dsPIC Bearing Fault Detector user manual-web
Contents
1. Estimate shaft rotational speed Acquire a new set of data Analyse the new data set Step 5 Reset At any time you can start from the beginning by pressing Reset button2. then shift the U to the 3 digit from left then press the 2 button twice to get 2 then shift the U to the AY digit from left and then press the 2 button three times to get 3 Now the LCD will display 05 230 Step 3 Acquire and analyze data After inputting the FCC1 value press button 1 to collect data though you could run the system for any time duration only 1 sec of data will be collected and analyse the incoming vibration data From this point on the user is not asked to enter any parameters The processor will continue using the already entered FCC The following is displayed when the analysis is finished Continue Step 4 Collect and analyze new data if necessary You can acquire new data or you may wait until it becomes necessary to collect analyze new data e g when the shaft speed or any other conditions change For this purpose you may press button to continue the analysis Then the microprocessor will acquire a new set of data display the previous results the spectral peak indices for the first three harmonics and starts processing the new set of data Please see the following diagram Reset or plug in the power cable Ask for the number of FCCs Num of FCC 1 4 default is 1 press button 1 to continue Input the FCC1 value Continue press button to continue Display previous results if this is the first iteration 3 zeros will be displayed for the first three harmonic peak indices
3. dsPIC Machine fault detector Users Guide LCD displa pay Reset Button Button 2 Button 1 Power input Fig 1 Explorer 16 board and some useful descriptions Fig 2 Prototype Operation steps of the harmonic based fault detector Step 1 Start Referring to figures 1 and 2 when you press the Reset button or turn the system on by plugging in the power input the power is supplied by a power adapter Microchip Technology SN 20182 input 100 240 V AC and output is 9 V DC 700 mA the LCD will display the copy right information and then displays the following message Num of FCC 1 4 Step 2 Input number of FCC s Here the user is asked to enter the number of FCC s Fault Characteristic Coefficients Note in the C programs FCC is represented by FCF that are going to be analysed As the default number of FCC s is one to pass this step just press button 1 The LCD will then display FCC1 the first FCC FCC1 00 000 U Note o To adjust the FCC button you need to use buttons 2 and 3 o Button 3 relocates the U sign to the location of the digit that can be changed o Button 2 changes the value of the digit that is above the U sign Each time this button is pressed the digit increases by one and when it passes 9 it will return to 0 o For example if the desired FCC1 is 05 230 we can shift U by pressing the 3 button once to the gmd digit from left and press the 2 button five times to get 5
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