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TDC1000-C2000EVM: Minimum level sensing

na na78
Guru 16770 points
Part Number: TDC1000-C2000EVM
Other Parts Discussed in Thread: TDC1000

Hi

Our customer is considering TDC1000 for water level sensing.

When they used TDC1000EVM, they could not get level data lower than 2.72 cm.

The setting of GUI was in default.

A resonant frequency of transducer  is 1MHz.

Actually, it could detect water level if it is 10cm or so.

The customer's target level is 5mm.  So we can achieve 5mm level sensing using TDC1000.

Could you please advise us?

BestRegard

  • 0
    TI__Mastermind 31655 points
    Hello,

    Please post the settings that are being used. It is most likely that the blanking time is too long, and is obscuring the return echo so that a STOP is not generated. I will need to see the settings used, and preferably some scope captures showing the START, STOP, and COMPIN signals for this situation.

    Regards,
  • 0 in reply to Scott Cummins
    Guru 16770 points

    Hi Scott

    Thank you for your reply.

    At first, I apologize I informed wrong EVM.

    We are testing with TDC1000-TDC7200EVM boards.

    The following is the setting I used this time.

    tek00000.tif

    Actual water level is about 1cm.

    Start and stop can be detected.

    Is this result normal?

    BestRegards