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Transponder telemetry

  • US 4,486,861 A
  • Filed: 12/24/1981
  • Issued: 12/04/1984
  • Est. Priority Date: 12/24/1981
  • Status: Expired due to Term
First Claim
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1. A telemetering transponder for transmitting information about the tension to which an underwater object is subjected, in response to receipt of a signal consisting of single pulse at a first frequency, comprising:

  • means associated with the object and adapted to receive the single signal pulse at the first frequency and in response thereto to transmit a first reply pulse at a second frequency that may differ from the first frequency;

    a strain gauge in communication with the object and arranged to produce an output indicating the tension to which the object is subjected;

    means for converting the output of the strain gauge to a count;

    means for reducing the count to zero at a fixed counting speed; and

    means for transmitting a second reply pulse at a third frequency that may differ from the second frequency, upon the count reaching zero.

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