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LDC1000EVM: Detecting progression of rusting

Part Number: LDC1000EVM

Hi ! 

I am working with iron powders or very thin iron sheets . I am setting up a test rig using LDC1000 to help understand the extent of oxidation ( rusting) in iron powder or sheets . In the experiments carried out we did notice the reduction of inductance value as the samples got oxidized or rusted .

I am looking for help in terms of increasing the sensitivity and also develop  means  to enhance / increase the inductance change for small changes in oxidation ( rusting) . 

Appreciate all responses , help advice .  Thanks a lot in advance , 

Regards,
Chandra

  • Hello,
    Unfortunately we do not have any data analysis for optimizing the LDC1000EVM for rust applications. Is it possible that inductance decrease is attributed to the metal/rust getting closer to the sensor? Typically, the response for an inductive measurement can be improved by decreasing the distance between the metal and sensor, changing the sensor frequency to optimize for the specific metal characteristics, optimizing the coil geometry, or by using a higher quality external clock source for the reference.
    Please take a look at our application notes which contain a lot of good info on inductive sensing as well as target design.
    Inductive Sensing Application notes: www.ti.com/.../inductive-sensing-technical-documents.page
    Target Design: www.ti.com/.../snoa957
    Regards,
    Luke
  • In reply to Luke LaPointe:

    Hello,

    Can you tell us the resonant frequency of your sensor?

    Regards,

    ChrisO