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Vibration Sensor with CC430

Amir B.
Intellectual 525 points


Hello all,

I have a vibration sensor that I want to connect to CC430. I would like to know if the process of reading the sensor is the same as reading the internal tempreture.

I did read the ADC ports and scanned them however I'm not getting any data from the sensor.

It would be much of appreciation if you provided some help.

Thanks

  • 0
    Expert 2740 points

    I need a telepathic link to your workbench.

    P

  • 0 in reply to Peter Dvorak
    Guru 227245 points

    Peter Dvorak said:
    I need a telepathic link to your workbench.

    I think, a video feed of a (high-res) webcam would be sufficient. Or just a description of what sensor is used. (part no., datasheet link) But yes, a telepathic link would be nice and could be used to give all the required information that was not in the original post.

  • 0 in reply to Jens-Michael Gross
    Intellectual 525 points

    currently using VS50-M from Vallen systems as a vibration sensor. However I have no idea where to start programming it ... 

    http://www.vallen.de/products/sensors/standard-sensors

  • 0 in reply to Amir B.
    Guru 227245 points

    Fri_coder said:
    currently using VS50-M from Vallen systems as a vibration sensor.

    Hmmm, I'm not sure whether the sensor is suitable for vibration detection. It is for acoustic emission sensoring (sort of a microphone) and probably has vibration decoupling.

    However, it is for 100-500kHz (resonance on 150kHz).
    You cannot directly sample the output signal by an MSP, as this would require 300kHz sampling frequency for 150kHz resonance, even more for higher frequencies.

    What you can do is

    1) feed the signal through a low-pass. This will produce a slowly changing voltage based on frequency (the higher the frequency, the lower the voltage) and intensity (the stronger the vibration, the higher the voltage). However, I doubt this will serve you. I don't knwo what you want to measure (the final purpose) but likely the frequency and intensity is what you need.

    2) put the signal on s schmitt trigger circuit and feed it into an MSP timer input pin. This way you can measure the average frequency over a period of time

    3) rectify and integrate the signal to get the average intensity. Which can be A/D converted by teh MSP.

    You may combine 2 and 3 by decoupling the signal with some OpAmps.

    However, I don't see a plain software (except for the MSP itself) solution

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