×

Remote sensor telemetering system

  • US 4,531,526 A
  • Filed: 08/29/1983
  • Issued: 07/30/1985
  • Est. Priority Date: 08/07/1981
  • Status: Expired due to Fees
First Claim
Patent Images

1. A telemetering system for measuring a selected physical parameter of an object comprising:

  • an indicator device comprising;

    an oscillator for generating an oscillating first signal,means for intermittently transmitting a signal burst comprising a selected number of oscillations of the first signal,means for receiving a second oscillating signal,means for selecting one of the oscillations of the second signal occurring after the end of each signal burst,means for measuring peak values for measuring the peak value of the selected one oscillation, andmeans for displaying the measured peak value for indicating the value of the selected physical parameter; and

    a passive but energy storing sensor circuit having associated therewith a variable figure-of-merit-of energy-storage (Q) for being excited by the transmitted excitation energy of the first signal to store a portion of the excitation energy and transmit a second signal having a parameter value dependent on the amount of excitation energy stored in the sensor circuit, the stored energy dissipating from the sensor circuit as a consequence of the transmission of the transmitted second signal, the rate of stored energy dissipation being dependent on the value of Q, the sensor circuit comprising;

    a first parallel tuned circuit having a resonant frequency for being rung by each signal burst from the indicator device, the tuned circuit transmitting the ringing to define the second signal, anda selected parameter sensitive member coupled in the tuned circuit for altering the shape of the ring down and therefore the peak value of each oscillation of the second signal after the end of each signal burst, the parameter sensitive member being attached in parameter sensing relationship to the object.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×