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Linear indutive transducer

Ricardo Pedro
Prodigy 80 points

Hi,

With LDC1000 I can measure a inductive position sensor (one coil with two wires that change inductance with position) between 7mH and 25mH? After, I need a acquisition frequency of 1kHz - 1,5 kHz (in other words, the digital value of inductance in MCU must be updated each 1 ms maximum.

Is possible with LDC1000? 

Thanks in advance.

Best regards

  • 0
    TI__Intellectual 2790 points

    Hi Ricardo,

    Yes.  However, you would have to

    1. reduce the TBCLK frequency, or

    2. access the EVM using a custom-script for 24-bit data

    if you want to data-log since at the moment the GUI does not support 24-bit inductance measurements.

    We have tested 7mH-25mH range successfully.  You would have to work with a lower oscillation frequency and increase the tank capacitance both by roughly 3 orders of magnitude.
    An increase in the filter cap would also be needed.  See the datasheet for more info.

    Thanks,

  • 0 in reply to Charles Cheung*
    Prodigy 80 points

    Thanks for your answer.

    In your message, I have a question with "access the EVM using a custom-script for 24-bit data". I don´t understand.

     

    Thank you!