WaveGuide - Direction User Manual
Contents
1. mHz s Tm0_1_M Minus first moment period from M 1 and MO in the range f 30 1000 mHz s Table 4 Parameters of spectral processing Name Description Unit H1 3 Average height of the highest 1 3 of the waves cm TH1 3 Average period of the highest 1 3 of the waves s H1 10 Average height of the highest 1 10 of the waves cm H1 50 Average height of the highest 1 50 of the waves cm T1 3 Average period of the longest 1 3 of the periods s GGH Average height of all waves cm GGT Average period of all waves s AG2 Number of waves SPGH Standard deviation of the wave height cm SPGT Standard deviation of the wave period s Hmax Height of highest wave cm Tmax Period of longest wave s THmax Period of highest wave s HCM Crest height maximum positive value of all data within one analysis period cm Table 5 Parameters from time domain processing of data collected in the last 20 min 29 Name Description Unit Nwt_zP Sum of periods of waves divided by analysis period Ndlr_H Number of valid sub series of the signal in the vertical direction Ngd_zP Percentage of data points that do not contain error code before pre processing Nu_z Number of valid data points that are rejected because of 0 sigma errors Nv_z number of valid data points that are rejected because of 4 sigma errors Nd_z number of valid data points that are rejected because of 4 delta errors Ni_z number of interpolated or extrapolated vertical wave motion datapoints T2. 10 and 15 deg from vertical in the direction away from the downward looking radar In this case the size and position of the array footprints depends on the choice of tilt angle and the vertical position of the radars height above actual water level e The line array where the mounting positions of the three radars form a straight line The two outside radars are mounted at zero inclination angles and the middle radar is tilted with an angle between 10 and 15 deg in a direction perpendicular to the line the radars are mounted on In this case the size and position of the array footprints depends on the mounting position the tilt angle and the vertical position of the radars height above actual water level e The triangle array where the mounting positions of the three radars form a triangle and all three radars are mounted at a zero inclination angle resulting in optimal per formance In this case the size and orientation of the array footprints are determined only by the horizontal positions of the radars S O Radar sensor functional y position and orientation lt q En a Nor Tilt angle of radar sensor North O Q functional with respect Psa Y wa Co to vertical A e Angle formed by the N 0 ye ay B line AC functional and reference North Figure 1 3 Definitions for WaveGuide Direction systems The proper installation of a WaveGuide Direction array of radars requires understanding the following naming
3. as the WaveGuide server that you are trying to connect to The WaveGuide server homepage contains 10 links in the menu bar on the left side Fig 3 1 Those links are described in Table 3 1 17 Link Description Measurements Measured data plots Parameters Calculated parameter plots Spectra Spectral plots of energy density mean direction and spreading Data logger Access to data logger files Sensor raw data Preview of raw data required for data processing routines Configure Sensor For defining the array and sensor configuration Subscriptions Settings for data distribution Configure Network Allows the user to change the network settings Set Date Time WaveGuide server date and time settings Expert Mode Allows for editing more settings System Info System state overview Table 3 1 Description of server links Step 2 Become an authorized user To modify the WaveGuide system configuration you need to be an authorized user There fore an authorization dialogue will appear when the user tries to change a configuration item The authorization will become invalid after 5 minutes of inactivity However the web browser may store the login name and password In that case the authorization data will be submitted automatically by the browser without a pop up dialog The default login name and password are both radac After successful authorization the changed settings will be stored and a reboot dialog will appear
4. connecting the radars to the server y Shielding LAN Service Serial Output 24 VDC and ground SS LAN 10 100 COM2 COM3 gt e COMI COM2 COM3 RADAR A RADAR B RADARC 2 5 2 5 23 5 173 PIBES ae ak ai ac AQ 230 230 123 123 123 xZ AXZ xxzZ i f J o Waveguide Waveguide Waveguide Radar A Radar B Radar C E FE EEE Service Serial Output Figure 2 2 Connector panel on the WaveGuide server In addition to the connectors used for connecting the WaveGuide radar the connector panel of the WaveGuide server includes the following connectors e COMI Reserved service port e COM2 Serial port for RS 232 data output e COM3 Serial port for RS 232 data output e LAN port Ethernet access to the server Note Each COM port is connected in parallel to both the DE 9 connector and the terminal block connector Hence only one of the two types of connectors needs to be used per COM port When the radar is powered through the server then the power supply for the server must be 24 36 VDC Please do take care of the voltage drop due to wire resistance between the server and the radar The power supply to the WaveGuide radar is controlled by the power switch on the WaveGuide server 12 2 3 Three cable connection Each cable between the server and a radar sensor must be a shielded five wire cable with at least one twisted wire pair The length of each cable can not exceed 1200 m T
5. distance should be left between the radars and the structure they are mounted to That is to prevent reflections as explained in the beginning of this chapter If the customer chooses to design and manufacture a frame the center of the mounted antennas must form an equilateral triangle with sides that are at least 45 cm long to avoid the collision of the sensor housings an example sketch is given in Fig 1 6 gt Figure 1 4 Top view of the three radar positions labeled A B and C in an anticlockwise se quence In this case the labels apply to the physical radars and their functional definitions 290 dd Figure 1 5 Top view of horizon tal beams distances in mm The images in Fig 1 7 show the radar array installation sequence First the inner part of the standard mounting frame is fixed to the horizontal beams Then the three antennas are mounted Next the two outermost radars are mounted to the antennas a wrench is provided as part of the optional mounting frame package Then the outer part of the frame can be lowered and fixed to the horizontal beams Finally the innermost radar can be fixed using the provided wrench Connector block side Figure 1 6 The Point Array mounting frame for the WaveGuide Direction radars and their positions in mm Figure 1 7 Installation sequence of the standard Point Array mounting frame for the WaveGuide Direction radars 1 4 The line array As
6. drop down menu Choose dirA and click edit This will display the configuration page for the WaveGuide Direction radar sensors Fill in the distances between the radar mounting points as defined by their functional labels Next fill in the Angle North AC deg This is the angle between the line formed by functional radars A and C and the reference North direction The preview geome try button generates an illustration of the array configuration based on the parameters provided see Fig 3 3 Figure 3 3 Preview of the array orientation based on user input 19 Step 4 Set sensor parameters The mounting height and tilt angle angle with vertical for each radar sensor must be set even if all three mounting heights and tilt angles are equal This can be done by clicking the configure button for each sensor respectively see Fig 3 2 and 3 4 Configure Remote Radar Sensor A Connection Settings 127 0 0 1 8888 Name sensorO Version 1 1 Angle with vertical deg 0 0 Mounting height cm 1200 0 Range Maximum m 20 0 Range Minimum m 2 0 Signal Minimum dB 20 0 submit Figure 3 4 Setting sensor parameters changes only take effect after the system is rebooted The tilt angle or the angle with vertical is measured in deg For the Point Array only radars B and C will have a tilt angle larger than 0 deg In the triangular array all 3 radars have a tilt angle of 0 deg While for the in
7. if radar is powered via server 9 36 VDC and 6 Watt if radar is powered separately 40 to 85 C No fan required 2 x 20 characters On board flash 32 General system specifications sampling rate 5 Hz wave heights 0 60 m wave periods 0 1 Hz accuracy water level lt 1 cm processing period wave height 20 min SWAP standard wave direction 20 min SWAP standard tide can be changed upon request default is 10 min processing interval wave height can be changed upon request default is 1 min wave direction can be changed upon request default is 1 min tide can be changed upon request default is 1 min 33
8. 5 deg half top angle as shown in Fig 1 1 The minimum horizontal distance between a radar and any obstacle in the beam s path should be at least 10 of the vertical distance between the radar and the obstacle This does not only include horizontal objects in the beam s path but also vertical structures Any structure that the WaveGuide radar sensors are mounted to might have some influence on the wave flow around it Hence it is advised to mount the radars at a position facing the mean wave direction so that the radars can measure the least disturbed water surface The reference level for the mounting height of the radars is shown in Fig 1 1 Figure 1 2 shows the polarization plane of the signal emit ted from a radar antenna If the WaveGuide radar is mounted close to a large vertical wall then the radar should be mounted such that the polarization plane is parallel to the wall That is to minimize the effect of the wall on the propagation of the signal Nevertheless the horizontal distance between the radar and the wall should comply with the previous criteria A vertically mounted radar 0 deg tilt angle results in optimal performance But if necessary the WaveGuide radar can be mounted with a maximum tilt angle of 15 deg tilted to face the direction away from the structure it is mounted on E Reference cea E O a Level a o he 5 we 0 18 m
9. 615004E 4 7 975558E 4 7 6214876E 4 7 1647903E 4 7 6107396E 4 6 847791E 4 6 6441507E 4 4 567583E 4 7 3393347E 4 8 3342794E 4 7 177321E 4 8 320104E 4 9 631133E 4 4 7024636E 4 5 479116E 4 7 0798665E 4 7 973897E 4 8 964213E 4 0 0010354978 5 15721E 4 8 0113555E 4 8 009798E 4 8 0272334E 4 8 0752687E 4 6 5126666E 4 8 172201E 4 5 1516114E 4 6 2683446E 4 5 63858E 4 3 5074513E 4 6 5980386E 4 5 53472E 4 7 269641E 4 6 289437E 4 6 156702E 4 5 8503065E 4 6 2185246E 4 5 5198127E 4 4 41777E 4 2 7770927E 4 3 3221033E 4 7 5746316E 4 6 8937184E 4 6 167301E 4 7 730603E 4 6 513776E 4 5 5705215E 4cm2 Hz 25 Chapter 4 Using the system 4 1 Calculated parameters Once the system is commissioned the facilities of raw data presentation reflection diagram system info etc can be used to monitor the proper operation of the system Water level and wave height information are calculated using the measurements of one radar physical RADAR A For directional information the measurements of all three radars are analyzed and the directional parameters are calculated There are two analysis routines Wave Analysis The Standard Wave Processing Package SWAP is used in performing time and frequency domain analysis on the measured data to calculate wave parameters This package is the standard processing package used by the Dutch government for wave height analysis It also meets the standards set by The International Association of Oil amp Gas Producers OGP A deta
10. Figure 1 1 The 5 deg half top angle of the F08 antenna beam and the reference level for mounting height measurement Polarization Plane Locking Pin Figure 1 2 Top view of radar an tenna and its polarization plane The working principle of the WaveGuide Direction system is the measurement of surface elevation at three different positions using an array consisting of three radars The array design criteria are e The footprints measurement points of the three radars on the sea surface must form a triangle e To obtain directional information of the same quality for all wave directions an equi lateral triangle is preferable but not critical e The measurement of wave directional parameters is optimal for wave lengths that are 3 to 30 times the array size distance between the center of two radar footprints For example if the dominant wave periods are between 3 and 10 sec long wave lengths from 15 to 150 m long Then for such waves a radar array size of 5 m is optimal To allow the WaveGuide Direction system to be installed in various locations it was designed to be mounted in one of three array configurations All three configurations allow for the radar array footprint to form an equilateral triangle on the sea surface at mean water level e The point array where the three radars are mounted on a single frame One radar is looking vertically downwards The two other radars are tilted with an angle between
11. G RADAC level tide and wave monitoring WaveGuide Direction Ex Certified User Manual CE Radac B V Elektronicaweg 16b 2628 XG Delft The Netherlands tel 31 0 15 890 3203 e mail info radac nl website www radac nl WaveGuide Direction User Manual Applicable for product no WG DR67 EX WG DR19 EX Version 3 2 16th of Mar 2015 G RADAC level tide and wave monitoring Preface This user manual and technical documentation is intended for engineers and technicians involved in the software and hardware setup of the Ex certified version of the WaveGuide Direction system Note All connections to the instrument must be made with shielded cables with exception of the mains The shielding must be grounded in the cable gland or in the terminal compartment on both ends of the cable For more information regarding wiring and cable specifications please refer to Chapter 2 Legal aspects The mechanical and electrical installation shall only be carried out by trained personnel with knowledge of the local requirements and regulations for installation of explosion proof equipment in hazardous areas The information in this installation guide is the copyright property of Radac BV Radac BV disclaims any responsibility for personal injury or damage to equipment caused by e Deviation from any of the prescribed procedures e Execution of activities that are not prescribed e Neglect of the general safety
12. SB devices are delivered with FAT32 format 26 Note The USB device used must not be formatted using NTFS A USB drive must be manually mounted when first used and will be automatically re mounted on system reboot Mounting a USB drive can be done via the push buttons on the front panel of the WaveGuide server Using button 1 scroll to the storage menu If the message Disk not mounted is displayed click button 2 If the message Mount USB disk OK is displayed Click button 5 to mount the device To unmount or remove the disk safely use button 1 to scroll to the storage menu Then click button 2 to arrive at the Safely remove OK option Then Click button 5 to unmount the device The Data Logger page in the web user interface Fig 4 1 gives access to the stored data Also the data can be transferred easily to other computers using an FTP program Login name and password for FTP file transfers are the same as the user name and password for modifying settings by default both user name and password are radac Data Logger Data directory Disk mounted 4992 MB free safely remove Figure 4 1 Data logger page The folder structure used is one directory per system In this directory sub directories are created that contain the raw data and parameter files one file per day per parameter If the drive is full a delete mechanism starts This allows the system to store the most recent parameters
13. The settings will not be effective until the WaveGuide server is rebooted Step 3 Configure the sensors The Configure Sensor page will display a sensor drop down menu Choose dirA and click the edit button This will display the configuration page for the directional array Fig 3 2 Sensor names in the port RADAR drop down menu sensor0 sensorl and sensor2 should not be altered unless the functions of the radar sensors need to be switched as in the case of a line array The physical radar sensors are called RADAR A RADAR B and RADAR C according to the connector they are connected to on the server side The actual radars must be mounted at positions A B and C depending on the chosen array as explained in Chapter 1 If the radar sensor functionality is switched then the sensor properties set using the web interface relate to the functional radar sensor A B or C not the physical radar sensor A B or C 18 Configure Directional Sensor Sensor Settings Sensor Type RadcanDir Connection Settings 127 0 0 1 3840 Name dira Sensor dira edit Distance A B cm 40 0 Distance A C cm 40 0 Distance B C cm 40 0 Angle North AC 120 0 deg Ipreniensgeamenl port RADAR A sensoro configure reflection port RADAR B sensor1 y configure reflection port RADAR C sensor2 y configure reflection reset submit Figure 3 2 The configure sensor page will display a sensor
14. able 6 Quality parameters Name Description Unit H Average height over last 10 seconds cm H1 Average height over last 1 minute cm H5 Average height over last 5 minutes cm H10 Average height over last 10 minutes cm Table 7 parameters from tide processing Name Description Unit Th010 10 mHz spectrum of mean direction deg deg SObh10 10 mHz spectrum of directional spreading deg deg Table 8 Directional spectra Name Description Unit Th0 Average mean direction in the frequency band 30 500mHz deg SObh Average directional spreading in the frequency band 30 500mHz deg Th3 Average mean direction in the frequency band 30 100mHz deg Table 9 Directional parameters 30 In the directional spectral analysis the frequency range from 30 500mHz is divided in 15 separate frequency bands These frequency bands are given in the Table 10 Name Description Unit BO 30 500 mHz Bl 200 500 mHz B2 100 200 mHz B3 30 100 mHz B4 Peak frequency band fmax A f to fmax A f mHz Gl 30 45 mHz G2 45 60 mHz G3 60 85 mHz G4 85 100 mHz G5 100 125 mHz G6 125 165 mHz G7 165 200 mHz G8 200 250 mHz G9 250 335 mHz G10 335 500 mHz Per frequency band 7 parameters are calculated These parameters are given in Table 11 Table 10 Frequency bands from 5 mHz spectra Name Description Unit Hm0__ Average wave height in the frequency band m Ndfe_ Number of degrees in the frequency band deg ThO_ Mean direction of the directional distribution in the frequenc
15. are powered from a separate source Power Supply Server Side Sensor Side i Junction Junction Box Box cnp a 1 Radar A 2 31 Radar A 1 l Radar B Radar B 2 31 Radar C 1 Radar C 2 31 Figure 2 6 The one cable connection diagram between the WaveGuide server and radars when the radars are powered from a separate source 15 Chapter 3 WaveGuide system commissioning With all the wiring in place as described in the previous chapter the server can be configured using the following steps explained in the current chapter 1 Connect the WaveGuide server to a computer 2 Become an authorized user 3 Configure the system Set sensor parameters Perform a system check Set system date time N DD Ot A Configure the distribution of data The display on the server shows system information and measured parameters and is con trolled using e Button 1 To switch between groups e Button 2 To switch between items within each group e Button 5 To confirm mounting and unmounting of USB data storage The server display contains the following groups and items e Parameters Scrolls through selected parameters Appendix 1 Table 1 e Network Host name IP address e System information Date and time Uptime Software version e USB storage only appears when USB device is connected State Mou
16. at the expense of the oldest data 27 Appendix 1 System parameters Default parameters In the web user interface and the physical display a selection of the raw and processed parameters is made available to the user Table 1 Name Description Unit heave Instantaneous water level cm SObh Average directional spreading in the frequency band 30 500mHz deg Tho Average mean direction in the frequency band 30 500mHz deg Th010 10 mHz spectrum of mean direction deg SObh10 10 mHz spectrum of directional spreading deg Hm0 Significant wave height from MO cm Ngd_zP Percentage of datap oints that do not contain error code before pre processing Tm02 Average period from MO and M2 in the range f 30 500 mHz s Czz10 10 mHz energy density spectrum cm Tmax Period of longest wave in the last 20 min s Hmax Height of highest wave in the last 20 min cm Fp Frequency f where Czz10 f has its maximum in the range f 30 500 mHz H10 Average height over last 10 minutes cm Table 1 Default parameters All possible parameters Tables 2 to 11 describe all the parameters measured and calculated by the WaveGuide Direction system Changing the parameters available by default on the web interface is possible It is strongly recommended that the user requests the changes when the WaveGuide Direction system is ordered so that all necessary tests can be performed at Radac Post installation adjustments to the available parameters are also possible upon reque
17. conventions and standards e The labeling of a physical radar A B or C is defined by the connector the radar is connected to on the server Upon delivery the functional definition of each radar is the same as the physical radar In certain cases e g when the radars are not installed in counter clockwise orientation the function of a radar can be assigned to a different physical radar e The positions of the radars A B and C functional must always be in a counter clockwise orientation In a line or a point array radar A functional must be the middle radar e Ina line array radar A functional must be radar B physical and vice versa e The positions of the radars A and C functional define the array orientation with respect to the reference North e On the configure sensor page of the web interface the following parameters can be found more information about accessing and using the web interface is available in Chapter 3 Distances between radar sensors functional Angle between line formed by radars AC functional and the reference North Relation between the radar sensor functional and the physical radar sensor the configuration parameters and reflection diagram of the selected physical radar sensor 1 3 The point array The point array has proven to be an easy to install configuration that requires the smallest amount of space on the supporting structure The correct installation requir
18. e Figure 3 8 List of defined subscriptions The address for a serial port subscription should have the following format port baud rate number of data bits number of stop bits parity handshake For example COM2 9600 7 1 EVEN NONE If the address string is not complete the default values will be used For example COM2 9600 will be interpreted as COM2 9600 8 1 NONE NONE The format for the network message is http ip address port For example http 192 168 111 103 8032 The format of the output string can be chosen from the drop down menu Four message format options are available Radac default KMA SESAM and FGTI After modifying or creating a new subscription click the update button and authorize the changes This will change and store the settings and implement the subscription no system reboot is required Radac message format The Radac format starts a new line for each parameter in the subscription The time used in the Radac format is Unix Epoch time in milliseconds UTC time in milliseconds since 00 00 00 on the 1 of January 1970 Each line in the Radac format ends with a Line Feed character char10 When a parameter is disapproved or not available the string NaN is inserted instead of the actual value NaN stands for Not a Number An example of the output strings in the Radac format is time 1157359800206 sensor radcan H1 319 9429cm time 1157359259847 sensor radcan Hm0 1 2517135c
19. es the radar sensors to be installed in a counter clockwise manner with radar sensor A installed as the center and vertical radar sensor Upon request Radac can provide a standard mounting frame product no WG MD EX that allows for easy and accurate mounting of the system fig 1 6 The mounting frame can be used to mount the three radars together while allowing the vertical mounting of one radar and the tilted mounting of two radars tilted to 15 deg from vertical This results in an ar ray footprint size that is approximately 25 of the mounting height Using the array design criteria it can be concluded that this configuration is optimized for measuring directional wave parameters for wave lengths that are 0 75 to 7 5 times the mounting height For example a mounting height of 10 m is optimal for wave lengths in the range from 7 5 to 75 m wave periods from 2 2 to 7 sec While a mounting height of 25 m is optimal for a wave length range from 18 75 to 187 5 m wave periods from 3 5 to 11 sec Installation The optional mounting frame product no WG MD EX con sists of two parts connected to each other by hinges The mount ing frame should be installed on two horizontal beams the hor izontal beams are not included in the mounting frame package Figure 1 5 shows the required positions of the mounting holes along the horizontal beams Note when designing and produc ing the horizontal mounting beams enough horizontal
20. ging the sensor parameters for the three radar sensors rebooting the system is required for the changes to take effect The reflection diagram of each sensor should be checked to ensure that the water level measurement is within the defined limits More information can be found in Step 5 1 Check the Reflection Diagrams 20 Step 5 Perform a system check This section explains how to inspect the quality of measurements after configuring and rebooting the WaveGuide server the start up process can take up to 5 minutes Step 5 1 Check the System Info page The bottom most table on the system info page displays the sensor status as shown in Fig 3 5 The communication status INIT indicates that the WaveGuide server is initiating the communication process with the radar sensors Once the communication process is initiated a process that can take up to five minutes after reboot the displayed status becomes OK System Info Waveguide Server Version Software Version 20140107 Waveguide Server Status Last Reboot Wed Nov 12 14 35 17 GMT 2014 Current Time Thu Nov 20 14 15 21 GMT 2014 Plots Served 83 Sensor Version Sensor Type Version dirA _ RadcanDir RadcanDir1 0 Sensor Status Sensor Communication Temp Measurements Invalids IdirA OK 1768744 104 Figure 3 5 System informati
21. he cable shielding must be connected to ground at both ends of the cable Since there can be a potential difference between the ground at the radar sensor side and the ground at the server side a capacitor 10 to 100 nF should be used on one side of the cable between its shield and the ground The twisted wire pair is used for the RS 485 communication link pins labeled 1 and 2 RS 485 transceivers use differential signals and need a third wire to provide a reference common voltage to allow for the interpretation of the differential signal pin labeled 3 Without this common reference a set of transceivers may incorrectly interpret the differential signal The remaining two wires out of the five wires in a cable are used for supplying power to the radar sensor pins labeled and Server Side Junction Sensor Side Box GND He 2 a I Shielding 3 E 7 R A RadarA 1 1 adar 2 2 L3 1 34 2 Shielding Radar B 1 1 Radar B 2 2 3 3 47 F Radar C 1 Radar C 3J Figure 2 3 The three cable connection diagram between the WaveGuide server and radars when the radars are powered from server 13 2 4 One cable connection When it is more convenient to use one cable to connect all three radars to the server for example when the one point array configuration is used The cable used must be a shielded nine wire cable with at least three twisted w
22. iled description of the SWAP package is available on the Radac website http www radac nl The SWAP parameters are calculated every minute using 20 minute data blocks The 20 minute observation block is chosen as a compromise between short enough to obtain small variance in the statistical parameters and long enough to assume it to be a stationary process The time stamp used on SWAP parameters is the mean between the start and end time of the 20 minute data block Tide Analysis The tide parameters are calculated by averaging measured data over 10 min periods by default Other averaging periods can be set upon request Parameters that are calculated over a time period get a time stamp that is in the center of the time period used to calculate them The spectra and parameters that can be cal culated by the WaveGuide system are described in Appendix 1 Due to the large number of parameters only a selection of the most commonly used ones is displayed on the user interface This selection can be modified by Radac upon request 4 2 Data logging A USB storage device can be easily mounted to the WaveGuide server for data logging But without taking additional precautions USB storage is not a safe method for archiving data Since power failures can damage USB devices it is advised to use an Uninterrupted Power Supply UPS together with a high quality USB device The WaveGuide server supports FAT32 Ext2 and Ext3 formats The majority of U
23. ion diagram of one of the three sensors Based on a one minute history of measured distance the WaveGuide system calculates an expected minimum and maximum distance for the next measurement The values for the expected minimum and maximum distance are shown on the reflection diagram using vertical green lines A horizontal green line shows the minimum expected reflection strength the value set as the Signal Minimum dB parameter The three green lines together form a region of acceptable values for the current measure ment and any values outside of it are ignored The highest peak in the region bounded by the green lines is considered to represent the distance to the water surface The region of acceptable values is automatically updated when persistent reflections occur outside this region Step 5 3 Check measurements On the Measurements page the data measured during the last 1 3 or 10 minutes can be viewed Please inspect the available graphs to visually confirm measured heave data 22 Step 6 Set system date and time Some customers choose to use their own facilities to log the time at which data points are collected However for the highest level of accuracy the WaveGuide server is capable of adding time stamps to measured data points The current date and time can be set using the Set Date Time page Fig 3 7 The date and time are kept by an on board clock with battery back up Please be aware that such on board cloc
24. ire pairs The length of the cable can not exceed 1200 m The cable shielding must be connected to ground at both ends of the cable Since there can be a potential difference between the ground at the radar sensor side and the ground at the server side A capacitor 10 to 100 nF should be used on one side of the cable between its shield and the ground The twisted wire pairs are used for the RS 485 communication links pins labeled 1 and 2 RS 485 transceivers use differential signals and need a third wire to provide a reference common voltage to allow for the interpretation of the differential signal pin labeled 3 Without this common reference a set of transceivers may incorrectly interpret the differ ential signal It is sufficient to use one wire to connect the reference common voltage pins labeled 3 of all three radar sensors to the reference common voltage pins labeled 3 of the three connectors on the server side please note that all reference common voltage pins on the server side and on the radar sensor side must be connected to the reference common voltage wire The remaining two wires are used for power and those can be connected to any of the radar sensor connectors and pins on the WaveGuide server side On the Side of the radar sensors an Ex certified terminal box must be used to split the two power wires the reference common voltage wire and the cable shielding to connect the 3 radars Se
25. ks are not very accurate and can drift over the years while the system is used If the system is connected to a network and has access to the Internet then it will automat ically synchronize the time and date with an Internet time server Even then it is advised to set the initial date and time as accurately as possible because the synchronization of date and time when there is a large difference takes a long time due to the small incremental changes After changing the system time or date the WaveGuide server must be rebooted Set Date Time GMT Date 14 2 v 1997 y Time 0 v o_r o_r reset update Figure 3 7 Setting the system time and date If the WaveGuide system is not connected to the Internet but instead connected to a local network that includes a time server then the server can be adjusted to synchronize time and date with the local time server For more information regarding such an adjustment please contact Radac 23 Step 7 Configure the distribution of data The WaveGuide server can transmit measured and calculated data via its serial ports COM2 amp COM3 and via its network link to several network addresses In the Sub scriptions page Fig 3 8 the existing subscriptions can be removed or modified and new ones can be added Simultaneous subscriptions are possible List of subscriptions remove new Address Protocol Sensor edit COM2 9600 8 1 NONE NONE Radac radcan heav
26. line array only radar C will have a tilt angle larger than 0 deg as explained in Chapter 1 The Mounting height is defined as the height of a radar above the reference water level n cm The reference point for measuring the height of each radar is the lower side of the radar mounting plate as shown in Fig 1 1 By default the mounting height is set to zero cm The Range Maximum is the maximum distance in m at which the sensor will detect the water level It is advised to set this parameter to a value lower than two times the distance from the radar to the lowest expected water level That is to avoid detecting multiple echoes of the same measurement sweep The Range Minimum is the minimum distance in m at which the sensor will detect the water level This parameter is used to avoid spurious measurements and should be set depending on the installation location If there are any nearby surfaces that can reflect the radar signal the Range Minimum should be set to a value higher than the distance to those reflecting surfaces The Range Minimum parameter should not be lower than 2 m to avoid interference with the internal reflection in the radar antenna The Signal Minimum is the lower limit for the signal power that will be considered in water level measurements This parameter should be set to 20 dB in the case of a vertically mounted radar sensor and set to 5 dB in the case of a tilted radar sensor After chan
27. m time 1157359860268 sensor radcan H1 NaNcm 24 KMA message format Modifications can be made upon request For example the Korean Meteorological Admin istration KMA format preferred a readable time format in the Korean time zone An example of the output strings in the KMA format is time 2006 09 04 17 58 00 H1 319 70026cm time 2006 09 04 17 48 59 Hm0 1 3314528cm time 2006 09 04 17 59 00 H1 NaNcm SESAM message format The SESAM format used by the Dutch Ministry of Infrastructure and the Environment Rijkswaterstaat is only defined for the heave and the 10 second mean H parameter It consists of 8 character lines Line Feed character status character sign character 4 character value in cm Carriage Return character For a regular message the status character is a space If an error occurs the status character becomes a letter A An example of the output strings in the RWS format is 0001 0004 A 9999 FGTI message format The FGTI format used by the Belgium government Where one string is used for all required information parameters spectrum per processing interval The chosen parameters are separated by a semicolon and the 51 spectrum values czz10 are included The NaN string is replaced with a 9999 string An example of the output string in the FGTI format is time 1159898219628 sensor radcan H1 3 0 101608045cm Hm0 0 070818946cm Czz10 0 0 5 0869432E 5 1 3970293E 4 4 7124052E 4 7 1
28. nt USB disk Unmount USB disk 16 Step 1 Connect the WaveGuide server to a computer Once the WaveGuide server is connected to a Local Area Network communication with the WaveGuide server can be done via the available web interface Fig 3 1 For this purpose any web browser with JavaScript enabled can be used Welcome to WaveGuide Server Please select an option from the menu on the left Figure 3 1 The web interface of the WaveGuide server Note A computer can be connected to the WaveGuide server directly using a network cable a crossover cable is not required By default during startup the WaveGuide server tries to obtain an IP address by searching the Local Area Network for a DHCP server If a DHCP server is not found the WaveGuide server will use the default IP address 192 168 111 71 When the WaveGuide server completes the startup process its IP address can be found via the LCD display it can take up to 10 minutes for the IP address to appear To view the IP address scroll through the menu using button 1 until network information is displayed and then use button 2 to switch between displaying the Host Name and the IP address The default IP address can be modified via the web interface To access the web interface type the IP address indicated on the LCD display e g http 192 168 111 71 in the ad dress line of your Internet browser Note that your computer must be on the same IP address subnet
29. nual describes the Ex version of the WaveGuide Direction system Warning Do not use the instrument for anything else than its intended purpose This manual consists of 4 chapters Chapter 1 specifies the criteria of radar sensor po sitioning for optimal quality of measurements Chapter 2 illustrates the mounting and installation procedure Chapter 3 describes the commissioning of the system via the user interface Chapter 4 explains data processing data presentation and data distribution within the system Please refer to Appendix 1 for a list of measured and calculated parameters And to Appendix 2 for specifications information about certification and environmental conditions applicable to the WaveGuide Direction system Chapter 1 Radar positioning and installation 1 1 Safety notes The personnel installing the WaveGuide system must have basic technical skills to be able to safely install the equipment When the WaveGuide system is installed in a hazardous area the personnel must work in accordance with the local requirements for electrical equipment in hazardous areas 1 2 Positioning For obtaining the best results from each WaveGuide radar sen sor a number of positioning criteria must be taken into account It is advised to choose a mounting position such that the WaveGuide radar beam is free of large reflecting obstacles the beam of the F08 antenna can be approximated to a conical shape having a
30. on In the same table the ratio between the number of performed and invalid measurements gives an indication of the system performance When the system is setup in a correct man ner the number of invalid measurements should be below 10 of the number of performed measurements However during the startup and communication initiation processes the number of invalid measurements can grow to over 1000 temporarily increasing the ra tio between invalid measurements and performed measurements The number of invalid measurement will show a slow increase after the initial invalid measurements 21 Step 5 2 Check the reflection diagrams The reflection diagram for each radar sensor can be accessed via the sensor configuration page by clicking on the corresponding reflection button Fig 3 2 Please note that each reflection diagram is displayed in a new window A reflection diagram is a graphic representation of a 25 ms scan where the signal strength dB is plotted against the measured distance m A scan consists of one up sweep increas ing frequency red curve and one down sweep decreasing frequency blue curve Often several peaks are visible in a reflection diagram as shown in Fig 3 6 This is caused by the multiple signal reflections between radar water surface and any objects within the radar foot print radarc Thu Sep 20 14 32 51 GMT 2012 signal strength 9 10 20 30 40 50 60 70 80 Figure 3 6 The reflect
31. osion proof in creased safety Ex e that allow for the installation of non armoured elastomer and plastic insulated cables from 7 5 to 11 9 mm in diameter In the terminal compartment of each WaveGuide radar there is a gray connector block as shown in Fig 2 1 This connector block is used to connect the RS485 data wires poles labeled 1 2 and 3 and supply power to the radar poles labeled and The housing of each WaveGuide radar has two intercon nected ground connections One in the terminal compart ment and one on the outside of the housing Cable Entries 1 RS 485 2 O GND 24 64 VDC Figure 2 1 Terminal compartment and connections Warning the WaveGuide radar Improper installation of cable glands or stopping plugs will invalidate the Ex approval of Warning Safety depends on proper grounding Check the resistance of the ground connection directly after installation The measured ground resistance shall be below the maximum prescribed by local grounding requirements 11 2 2 WaveGuide server For ease of use the connector poles common between the WaveGuide server and radars are marked using the same labeling symbols Warning It is of utmost importance to keep in mind the positions of the installed WaveGuide radars with respect to the chosen array type when
32. precautions for handling tools and use of electricity The contents descriptions and specifications in this installation guide are subject to change without notice Radac BV accepts no responsibility for any errors that may appear in this installation guide Additional information Please do not hesitate to contact Radac or its representative if you require additional information Contents Preface Introduction 1 Radar positioning and installation 1 1 Safety notes aaa Yoana e a ar a a 1 22 Positioning dni o aar eca a A eo A A AA A as 1 3 The p int array oa poaae a aa a ca LA The lineas 35 42 2 sr Meg dg Is Qe he a a eg Se 15 The tbriangle array ue si 2 ge ae ee a A 2 Wiring 2 1 Wayvegwderadar 2 2m A ek hi cn 2 2 WaveG uideiserver wann A eine en 2 3 Three cable connection 2 2 a a a 2 4 One cable connection 2 s e e e a 2 5 Separate sensor power supply 2 22 2 En En nn 3 WaveGuide system commissioning Step 1 Connect the WaveGuide server toa computer Step 2 Become an authorized user 2 2 2 Cm om nn Step 3 Configure the sensors 2 2 2 2 mm nn nn Step 4 Set sensor parameters Step 5 Perform a system check 2 CE m on e Step 6 Set system date and time nn Step 7 Configure the distribution of data 4 Using the system 4 1 Calculated parameters Co Con nn 4 2 Data Jopin ahnen ee A a
33. re A A en Appendix 1 System parameters Appendix 2 System specifications 16 17 18 18 20 21 23 24 26 26 26 28 32 Introduction The principle of operation of a WaveGuide Direction system is based on the synchronized measurements of sea elevation heave at three different spots on the surface of the water The slopes around two horizontal and perpendicular axes are calculated using the measured elevations Then the correlations between the calculated slopes and the measured heave values are used to calculate the wave directional information The three radar sensors are standard WaveGuide Height radar sensors that are connected to a WaveGuide Direction server Each WaveGuide radar sensor measures the distance between the sensor antenna and the water surface The WaveGuide server takes care of data handling synchronized measurements processing distribution and presentation The WaveGuide server unit also facilitates commissioning and remote servicing of the system All facilities are accessible via the built in web server running on the WaveGuide server The WaveGuide radar sensors are available in two versions e A standard Ex certified version e A non Ex certified stainless steel version where the antenna and electronics are built into one stainless steel compact unit The antenna and electronics are the same in both versions but the stainless steel version is easier to handle due to its compact size This ma
34. rver Side citar A Sensor Side Junction Junction Box Box GND 1 Radar A A 2 3 RadarA 1 2 L3 Ri Pa E i 1 Radar B Radar B 1 2 2 3 L3 u RadarC 1 BS 2 1 Radar C 3 2 3 Figure 2 4 The one cable connection diagram between the WaveGuide server and radars when the radars are powered from server 14 2 5 Separate sensor power supply In some cases it is more convenient to use a separate power supply to power the radar sensors rather than supplying them with power from the server side In that case a 24 64 VDC power supply can be used on the radar sensor side to supply them with a total of 18 Watt of power If a separate power supply is used for the radar sensors then the one cable or three cables used to connect the server to the radar sensors do not need the extra two wires per cable for power Hence in the one cable solution seven wires will be sufficient and in the three cable solution three wires per cable will be sufficient Power Supply Server Side Junction Junction Sensor Side i Box Box E GND i E ete Shielding 7 Radar A 1 1 Radar A E i E 3 oe E 4 Shielding HI 7 Radar B 1 ze Radar B 2 2 3 3 i E 1 Radar C Radar C 2 i 2 3 u Figure 2 5 The three cable connection diagram between the WaveGuide server and radars when the radars
35. st Name Description Unit heave Instantaneous water level cm slope Water surface slopes Table 2 Raw data at 2 or 2 56 Hz 28 Name Description Unit Czz5 5 mHz energy density spectrum mHz WTBH Table of wave heights cm WTBT Table of wave periods s Czz10 10 mHz energy density spectrum mHz Table 3 Spectra and wave tables Name Description Unit Hm0 Significant wave height from MO cm MO Band energy from Czz10 f in the range f 30 500 mHz cm MO_M Band energy from Czz10 f in the range f 30 1000 mHz cm Hm0_M _ Significant wave height from MO_M cm Tm02 Average period from MO and M2 in the range f 30 500 mHz s Tm02_M__Average period from MO and M2 in the range f 30 1000 mHz s TEO Band energy from Czz10 f in the range f 500 1000 mHz cm TE1 Band energy from Czz10 f in the range f 200 500 mHz cm TE1_M Band energy from Czz10 f in the range f 200 1000 mHz cm TE2 Band energy from Czz10 f in the range f 100 200 mHz cm HTE3 Wave height from TE3 band energy from Czz10 f where f 30 100 mHz cm Fp Frequency f where Czz10 f has its maximum in the range f 30 500 mHz mHz Fp_M Frequency f where Czz10 f has its maximum in the range f 30 1000 mHz mHz AV10_H Theoretical number of degrees of freedom of the energy density spectrum cm 4 Ndlr_H 20 HS7 Wave height from band energy from Czz5 f in the range f 30 142 5 mHz Tm0_1 Minus first moment period from M 1 and MO in the range f 30 500
36. ting of the radar at different angles product no WG MH EX 1 5 The triangle array As with other array configurations the labeling of a physical radar sensor A B or C is defined by the connector the radar is connected to on the server The mounting positions of radars A B and C must be anticlockwise when looking from above as shown in Fig 1 11 A mounting plate can be used to fix each radar to two horizontal beams at the desired location an example sketch of such a plate is given in Fig 1 12 Upon request Radac can supply such a mounting plate product no WG MP EX During installation it is advised to install the mounting plate first then install the radar antenna and then install the radar Q f B gt 007 Otz Figure 1 11 The three radar positions are num bered A B and C in an anticlockwise sequence Figure 1 12 Optional mounting plate for an Ex certified WaveGuide Radar product no WG MP EX 10 Chapter 2 Wiring 2 1 WaveGuide radar The terminal compartment in a radar has three cable en tries as shown in Fig 2 1 Each entry has a 3 4 NPT thread This type of thread forms a fluid tight seal but it has the disadvantage that it makes unscrewing of the glands impossible without causing damage to the thread Each radar sensor comes with two M20 cable glands two converters to convert from NPT to M20 and two NPT stop glands The provided cable glands are expl
37. with other array configurations the labeling of a physical radar sensor A B or C is defined by the connector the radar is connected to on the server But the Line Array requires that the physical radar sensor A is set using the web interface as the functional radar B and vice versa This allows tilting the functional radar A physical radar B away from vertical and by doing so forming a triangle with the radar foot prints on the water surface The conventions for the radar physical definitions functional definitions and tilt angles are shown in Fig 1 8 A mounting plate can be used to fix each radar to two horizontal beams at the desired location an example sketch of such a plate is given in Fig 1 9 Upon request Radac can supply such a mounting plate product no WG MP EX During installation it is advised to install the mounting plate first then install the radar antenna and then install the radar Upon request Radac can supply an optional frame product no WG MH EX that allows for mounting a radar at angles 0 5 10 15 and 20 deg with the horizontal plane shown in Fig 1 10 Each frame includes a mounting plate e op Figure 1 9 Optional mounting plate for an Ex Figure 1 8 Top view of the three physical certified WaveGuide Radar product no WG radars labeled A B and C With the functional MP EX definitions labeled A B and C Figure 1 10 Optional frame that allows moun
38. y band deg SObh__ Average width of the directional distribution in the frequency band deg Gl_ Average asymmetry of the directional distribution in the frequency band _ G2_ Average flatness of the directional distribution in the frequency band _ Fm01_ Average frequency in the frequency band mHz Table 11 Parameters in each of the 15 frequency bands 31 Appendix 2 System specifications WaveGuide radar Mechanical Dimensions Weight Casing material Electrical Radar frequency Modulation Emission Power requirements 26 x 44 cm diameter height 14 kg Chromatized aluminum 9 9 10 2 GHz Triangular FMCW The emitted microwave energy is far below acceptable limits for exposure of the human body Depending on the type of antenna a maximum radiation of 0 1 mW is generated 24 64 VDC and 6 Watt when powered separately from server Environmental conditions Ambient temperature Relative humidity Ingress protection Safety 40 to 60 C 0 100 IP67 Explosion proof ATEX II 1 2 GD T80 C EEx d IIB T4 Class I Division 1 Groups C and D acc to ANSI NFPA 70 FM CSA WaveGuide server Dimensions Computer boards Processor COM ports Network Power requirements Operating temperature Cooling Display Memory 48 x 9 x 28 cm width height and depth AAEON GENE TC05 Intel Atom E620T 600MHz 3 x RS485 used to connect the radar 3 x RS232 Ethernet 24 36 VDC and 12 Watt
Download Pdf Manuals
Related Search