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Inductive Sensing Design Challenge: Portable Detector based on the LDC1000 (#6)

Former Member

This weekend I have been talking with a friend about this project. We looked at what is needed to get a custom coil to work with the best settings. To get the correct values for Rp_Min, Rp_Max and frequency you should use an Impedance Analyzer. These are very expensive. So I have to find a place where I can use one for a short time.

 

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Inductive Sensing Design Challenge: Portable Detector based on the LDC1000 (#5)

  • in reply to Former Member

    Sergio,

    I have been looking at WEBENCH. Unfortunately it is only useful for PCB coils with small diameter. I was thinking about designing an auto calibrating system for coils using the LDC1000. I mean a one-time calibration to find the best values for Rp_Min, Rp_Max and frequency. Could this work?

  • Hi Elbert and all,

    in Texas Instruments we’re in general trying to make users more&more happy with our Webench tool, and here a good point is that we have a nice Webench feature related to LDC1000.

     

    Just clicking at http://www.ti.com/lsds/ti/analog/webench/inductive-sensing.page you can access the easy-to-use WEBENCHRegistered Inductive Sensing Designer.

     

    Over that web page it’s already explained with full details how to properly design for suitable coils fitting your design goals in a few clicks, this taking in account and graphically controlling inductance vs distance, resolution versus distance, and Rp (impedance) vs distance parameters.

     

    I think that this Inductive Sensing Designer tool could be a very valuable resource while cross checking in advance for possible alternatives over same targeted application, and going further on your design even exporting CAD-like files for rapid prototyping.

     

    This just as heads up to simplify and speed up overall design phase, then I’m considering to upload too some slides to better explain it step by step.

     

    Just keep going with new ideas for your inductive sensing based designs!