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Original question:

[FAQ] Inductive sensing FAQ - Frequently asked questions

LDC1101: LDC1101

shivam Pandey
Prodigy 70 points
Part Number: LDC1101

If a sensor coil is moving with 3m/sec linearly. Can it detect any defect in metal? 

please suggest.

  • 0
    TI__Mastermind 23810 points

    Shivam,

    That is not a suggested application for TI's inductive sensing portfolio. Here are the reasons why I don't think it will work:

    - An Rp measurement could help detect a compositional change in the metal, but Rp measurements are best suited for identifying several distinct metals. It may not do well identifying small changes.

    - Rp varies quite a bit with temperature, which is one of the reasons why it is unsuitable for detecting small changes.

    - L measurements are good for detecting changes in distance, but it would not be able to detect small spurs or defects that are much smaller than the coil size.

    - Any changes in distance from the metal to the coil as the coil is moved will change the Rp and L readings. So you will be unable to tell if the delta is due to a defect or due to a small distance change

    - tilt of the metal or coil will also look like a distance change