RT- Backpack User Manual
Contents
1. User Manual Confidently Accurately Legal Notice Information furnished is believed to be accurate and reliable However Oxford Technical Solutions Limited assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Oxford Technical Solutions Limited Specifications mentioned in this publication are subject to change without notice and do not represent a commitment on the part of Oxford Technical Solutions Limited This publication supersedes and replaces all information previously supplied Oxford Technical Solutions Limited products are not authorised for use as critical components in life support devices or systems without express written approval of Oxford Technical Solutions Limited All brand names are trademarks of their respective holders Copyright Notice Copyright 2014 Oxford Technical Solutions Revision Document Revision 141027 See Revision History for detailed information Contact Details Oxford Technical Solutions Limited 77 Heyford Park Upper Heyford Oxfordshire OX25 5HD England Tel 44 0 1869 238 015 Fax 44 0 1869 238 016 http www oxts com mailto info oxts com a Oxford Technical Solutions RT Backpack User Manual Oaxrs Table of Contents System Overview 4 Scope of Deliv2. a client and will be ready to be used as a target For more information about the RT XLAN please refer to the RT XLAN user manual which is available at http support oxts com more user manuals Configuration There are no user configuration options on the RT XLAN However it is important to make sure that each unit is compatible with the other units in the environment There are several items to consider Each RT XLAN will have a label showing its configuration The RT XLAN labelled Base should be used on the Hunter vehicle The RT XLAN labelled Client should be used on the Target vehicle There cannot be two RT XLAN base units in the same environment There must be one RT XLAN base unit The RT XLAN client units will not communicate with each other unless there is a base present Each RT XLAN has an IP address All the units being used must have different IP addresses Normally the IP address will be in the range from 195 0 0 170 to 195 0 0 175 It is possible to order different IP addresses from OxTS This IP address range should not conflict with the recommended IP addresses with other OxTS equipment The RT XLAN will be configured for use in a specific country Different licensing laws require different frequencies to be used in different countries RT XLAN units from one country cannot be used automatically with RT XLAN units from another country It is possible to change the configuration in
3. mm hex key 1 Survey grade antenna for multi path rejection 1 1 m TNC TNC GPS antenna cable 1 7 Ah 12 volt battery 1 14C0077B user cable 1 RT XLAN client Wireless LAN radio and PoE cable 1 2 4 Ghz antenna 1 Base to antenna extension pole and L bracket RT XLAN 1 Wiring harness 1 Mains powered battery charger 1 RT Backpack user manual Table 2 Optional RT Backpack Components Qty Description 1 Radio modem for DGPS signals country specific 1 Radio antenna country specific Revision 141027 Ee Warranty Oxford Technical Solutions Limited warrants the RT Backpack products to be free of defects in materials and workmanship subject to the conditions set forth below for a period of one year from the Date of Sale Date of Sale shall mean the date of the Oxford Technical Solutions Limited invoice issued on delivery of the product The responsibility of Oxford Technical Solutions Limited in respect of this warranty is limited solely to product replacement or product repair at an authorised location only Determination of replacement or repair will be made by Oxford Technical Solutions Limited personnel or by personnel expressly authorised by Oxford Technical Solutions Limited for this purpose In no event will Oxford Technical Solutions Limited be liable for any indirect incidental special or consequential damages whether through tort contract or otherwise This warranty is expressly in lieu of all other warranties exp
4. one shown in the diagram but will provide equivalent or superior performance 4 The frame front plate 6 can now be attached to the main frame using four M6 x 12 mm button head screws 5 The RT XLAN 7 should be attached to the Base to Antenna Extension Pole fixed to the boss on the frame front plate The RT XLAN can then be height adjusted for maximum performance 6 The user cable can now be connected Start by attaching it to the RT sensor Route the other wires carefully through the frame to their respective components This is clearly marked on the loom 7 Connect the user cable to the battery 5 Connect the positive terminal first then the negative one 8 The RT Backpack is turned on using the toggle switch mounted near the top of the RT sensor 3 o Oxford Technical Solutions Figure 1 Assembly of the RT Backpack Revision 141027 Ka Configuring the RT Backpack NAVconfig settings Some RT models have different options These are set when the correct model is selected in step one of NAVconfig Figure 2 Settings can be prepared in advance as NAVconfig does not require a device to be connected Figure 2 NAVconfig Step 1 Product Selection NAVconfig wizard Product Selection Select the product for configuration RT3000 Inertial and GNSS Navigation RT2000 RT3000 RT4000 Step 1 of 10 Inertial Survey xNAV Read Configuration ces GNSS Selection Orientation Primary Antenna Sec
5. the field but it is necessary to contact OxTS support for information on how to do this If any configuration is changed then make sure the stickers on the outside of the RT XLAN are changed to reflect the configuration changes made 18 Oxford Technical Solutions RT Backpack User Manual Qoxrs Operation Once everything is connected the RT Range can be powered up The RT XLAN should work automatically and the RT Range can be used as normal LED indicators Found on the side of the RT XLAN are a series of LEDs These provide a quick indication of the status of the RT XLAN without the need for any software The meanings of these LEDs are shown in Table 4 Table 4 LED indicators LED Label Description Power Power on lt gt Link established p Shows the strength of the signal across four LEDs The signal strength indicator is a very useful tool for quickly checking the vehicle vehicle signal strength before attaching a PC to the RT Range system Checking the communication link It is possible to check that the communication link is working and there are several ways to do this It should be possible to ping the IP address of the RT XLAN This can be pinged first on the Ethernet side i e without any wireless communication and then on the remote side i e through one RT XLAN to another If the RT XLAN is working then packets from RT systems should be visible from any node Enginuity can be used to r
6. 0 Differential RTCA SBAS None Product Selection DGNSS service Disabled Read Configuration CAN Disabled GNS lection Orientation Primary Antenna Secondary Antenna initialisation speed im s Advanced Slip Displace output Disabled Heading lock Normal Garage mode Disabled Distance output None Analogue output Disabled Acceleration fiter Enabled Wheel speed Disabled Local co ordinates Disabled Serial 1 output Disabled Ethemet output Enabled Steering robot IP Disabled Output smoothing Disabled Slip points Disabled Commit Save Finish English x lt Back Revision 141027 e Inertial GPS Before committing any settings Figure 9 make sure the correct RT is selected as several may be available on the network Figure 9 NAVconfig Step 8 Commit P navconfig wizard BES Commit Commit configuration to the RT3000 RT3000 Inertial and GNSS IP Address of the RT3000 that you want to configure Navigation TIET Step 9 of 10 Product Selection Read Configuration G Primary Antenna Secondary Antenna Advanced Slip Options Save Finish Dev ID 140917 14am EE English X lt Back Commit Cancel It is not necessary to save a copy of any settings Figure 10 as they can be read from the device using NAVconfig Several files are created when saving settings so it is best to create a new folder for each set Figure 10 NA Vconfig Step 9 Save Finish P NAVconfig wizard
7. Finish Save configuration to a folder RT3000 Inertial and GNSS You have not yet committed your changes to the RPTP T3000 Go back to the Commit screen to retry Save settings Save settings in the following folder C Program Files amp 86 OxTS RT Range RT Back x _ Browse Step 10 of 10 Product Selection Primary Antenna Secondary Antenna Advanced Slip Options Commit Dev ID 140917 14am English x 4 Oxford Technical Solutions RT Backpack User Manual Qoxrs NAVconfig Options Many of the options available in step 7 of NAVconfig do not apply when configuring an RT Backpack Most default options are suitable with the exception of heading lock which should be disabled Only the settings listed here should be reviewed Care should be taken when reading an existing configuration from the RT device or using a saved configuration in case settings have been changed accidentally e GPS environment change this to suit the operating environment An RT sensor will only achieve accuracies that meet its specification in open sky mode e Differential when using radio modem DGPS corrections these need setting See the Differential Correction Option section of the RT Manual o SBAS see SBAS Option section of RT manual o OmniSTAR see OmniSTAR Option section of RT manual e Heading Lock this must be disabled in an RT Backpack application e Initialisation Speed this should be set to the
8. S Selection Poss Primary Antenna Accura Edes Secondary Antenna Advanced Slip Options Commit A wamed up correctly operating RT will have Save Finish See a tea r m the RT3000 device Dev ID 140917 14am EE Enalish M lt Back Next gt Cancel Revision 141027 i Inertial GPS The primary antenna measurements will be read from the predefined settings file when used Figure 5 It is important to re check the Above measurement as the antenna pole may be set to a different height z axis to the one used in the settings file Figure 5 NAVconfig Step 4 Primary Antenna P navconfig wizard Primary Antenna RT3000 Specify the primary GNSS antenna position on the vehicle in relation to the RT3000 Inertial and GNSS Measured from the RT3000 device Navigation Where is the measurement point of the GNSS antenna REE 00007 town OED Right j 0100m to within 0 050m F Above 0560m towthn O050m Step 5 of 10 Product Selection Read Configuration GNSS ction I Specify each accuracy separately Orientation Overall accuracy 0 050m v Secondary Antenna Advanced Slip Options Commit Save Finish Dev ID 140917 14am E Enish z The RT Backpack does not use dual antennas so make sure that option is disabled Figure 6 Figure 6 NA Vconfig Step 5 Secondary Antenna P NAVconfig wizard MEE Secondary Antenna RT3 o 00 Speci
9. cess again Data from the RT Backpack can also be monitored in the RT Range software using the Real time display window A full explanation of this can be found in the RT Range manual in the Real time display section It is worth noting that even though the RT Backpack is transmitting data to the RT Range it does not mean the RT Backpack has achieved its expected accuracy and care should be taken to check this before any test commences During tests it is quite feasible for the person wearing the RT Backpack to monitor its status using Enginuity and a laptop PC connected wirelessly to the relevant RT device Doing this will not affect the performance of the RT Backpack or the data being broadcast to the hunter RT Range device 16 Oxford Technical Solutions RT Backpack User Manual Qoxrs Charging the Battery The RT Backpack is supplied with a maintenance free rechargeable lead acid battery and mains powered charger In ideal conditions the battery should provide approximately three to four hours of use before needing a charge although it is advisable to start any test with the battery in a fully charged state While it is impractical to walk around with the RT Backpack while charging configuration changes or bench tests can be conducted while the system charges The battery can be charged without powering down the RT Backpack Revision 141027 a Using the RT XLAN The RT XLAN in the RT Backpack will come pre configured as
10. eceive the packets The LED indicators on the RT XLAN will provide a quick indication of a communication link and the strength of the signal as shown in Table 4 Revision 141027 19 Revision History Table 5 Revision History Revision Comments 130208 Initial version 141027 Revised for RT XLAN changes EJ Oxford Technical Solutions
11. ery 5 Warranty 6 Specification 7 Assembly Instructions 8 Configuring the RT Backpack 10 NAVconfig settings 10 NAVconfig Options 15 RT Range Settings 15 Initialisation and Warm up 16 Charging the Battery 17 Using the RT XLAN 18 Configuration 18 Operation 19 Checking the communication link 19 Revision History 20 Revision 141027 a System Overview The RT Backpack is a collection of small and lightweight components that transform any RT sensor into a wearable RT Range target object This makes it ideal for testing and validating advanced driver assistance systems ADAS especially where there is a need to track pedestrians cyclists or motorcyclists While the RT Backpack is packaged differently the principal of operation is the same as an RT Range target RT Range hunters do not differentiate between data received from target RT Ranges or RT Backpacks and treat both as mobile targets For that reason only information unique to the RT Backpack is covered in this manual All other relevant information can be found in the RT Range manual al Oxford Technical Solutions RT Backpack User Manual Qoxrs Scope of Delivery Table 1 lists all standard items delivered with the RT Backpack Table 2 lists optional components Table 1 Standard RT Backpack Components Olay Description 1 Backpack 1 Frame including fasteners 1 50 cm pole including fasteners 1 RT Backpack Bolt Pack Qty 5 x M4x8 hex bolts amp washers 3 mm amp 4
12. fy the secondary GNSS antenna position on the vehicle in relation to the primary antenna Inertial and GNSS I Enable secondary antenna Navigation Tm pd Step 6 of 10 Product Selection Read Configuration G elec Primary Antenna Advanced Slip Options Commit Save Finish Dev ID 140917 14am EE Enolish X lt Back Next gt Cancel i Oxford Technical Solutions RT Backpack User Manual Inertial GPS The advanced slip option Figure 7 is not applicable to the RT Backpack Ensure it is disabled Figure 7 NAVconfig Step 6 Advanced Slip P NAVconfig wizard AEE Advanced Slip Specify the position of the non steered axle RT3000 Inertial and GNSS IT The vehicle has a non steered ade Navigation s 7 Step 7 of 10 Product Selection Orientation Primary Antenna Secondary Antenna Options Commit Save Finish Dev ID 140917 14am EE Enolish hd lt Back Next gt Cancel Several settings should be checked on the options page Figure 8 Most importantly Displace Output should be disabled The RT Range applies any displacement For a full explanation of options see NA Vconfig Options on page 15 Figure 8 NAVconfig Step 7 Options NAVconfig wizard Performance Options RT3 0 00 Advanced options to improve the performance of the RT3000 Inertial TES Vehicle starts Level Navigation Vibration Normal GNSS environment Open sky Step 8 of 1
13. ondary Antenna Advanced Slip Options Commit Save Finish Dev ID 140917 14am English A predefined setting for the RT Backpack is included with NAVconfig This is normally located at C Program Files x86 OxTS RT Range RT Back Use the Read Settings from a Folder option to locate it See Figure 3 10 Oxford Technical Solutions RT Backpack User Manual Inertial GPS Figure 3 NAVconfig Step 2 Read Configuration NAVconfig wizard Read Configuration Choose where the initial settings should be read from RT3000 Inertial and GNSS Use default settings Navigation Read settings from a folder Step 2 of 10 C Read settings from an RD file Product Selection GNSS Selection C Read intial settings from RT3000 Orientation Primary Antenna Folder aeee Ee C Program Files K86 OxTS RT Range RT Back Advanced Slip Options Commit Save Finish Dev ID 140817 14am EE Erglish lt Back Net gt In an RT Backpack application the y axis always points left and the z axis always points forwards Figure 4 This is set automatically from the predefined settings file Figure 4 NAVconfig Step 3 Orientation P NAVconfig wizard BBE Orientation Specify how you have mounted the RT3000 in the vehicle RT3000 Inertial and GNSS Y axis points fa H Navigation Z avis points Forward X I Use advanced settings Step 4 of 10 Product Selection Read Configuration 90 deg GNS
14. ressed or implied including without limitation the implied warranties of merchantability or fitness for a particular purpose The foregoing states the entire liability of Oxford Technical Solutions Limited with respect to the products herein a Oxford Technical Solutions RT Backpack User Manual QOoxrs Specification Table 3 RT Backpack Technical Specifications Parameter Specifications RT XLAN Radio Range Line of Sight m gt 500 RT XLAN Delay ms RMS lt 10 Temperature Range C 10 to 50 Dimensions mm 340 x 270 x 180 Mass kg 5 Revision 141027 A Assembly Instructions Assembly of the RT Backpack is not complicated but requires care to avoid damaging components Please follow this process while referring to the diagram in Figure 1 1 Mount the RT sensor 3 in the frame 4 using the M4 x 8 mm cap head screws and 3 mm hex driver For non permanent installations the RT sensor can be mounted using only three screws as access is restricted to the screw nearest the main switch in the frame The screws should be tightened firmly to prevent movement but not overly tight 2 If the optional DGPS radio 2 is being used for differential corrections this should be fitted using the supplied hook and loop strips 3 Use the U bolts and dome head nuts to fix the mounting pole and antenna 1 into the frame A flat washer and spring washer should be fitted under each nut The supplied antenna may differ from the
15. speed of a brisk walk 1 m s After initialisation this value has no effect on the output e Displaced Output this must be disabled The hunter RT Range applies any offsets So any value entered here will cause an error at the RT Range RT Range Settings Because the hunter RT Range does not differentiate between RT Backpack and RT Range target objects the RT Backpack can be configured in the same way as normal RT Range targets See the RT Range manual for details Revision 141027 el Initialisation and Warm up To initialise the RT Backpack exceed the initialisation speed specified in NAVconfig Options Figure 8 p 13 It is important to walk forwards and in a straight line the first time the initialisation speed is exceeded Figure 11 Operating the RT Backpack It is important not to turn too quickly when operating the RT Backpack or the gyros can become saturated Depending on the model of RT used the maximum speed of rotation should not exceed 100 s or 300 s It is important not to spin too quickly when wearing the RT Backpack as this can saturate the gyros The RT sensor is designed to work on vehicles boats and aircraft Humans can spin much faster and therefore exceed the operating thresholds of the sensors Care should also be taken when donning the backpack for the same reason If the specification of the gyros is exceeded the RT may need to be reset and go through the initialisation and warm up pro
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