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Temperature detector using a surface acoustic wave device

  • US 4,249,418 A
  • Filed: 04/12/1979
  • Issued: 02/10/1981
  • Est. Priority Date: 04/20/1978
  • Status: Expired due to Term
First Claim
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1. A temperature detector using a surface acoustic wave device comprising:

  • a transmitting section including an oscillator having a surface acoustic wave device of which the frequency characteristic varies responding to the temperature of a base plate thereof, said base plate being attached to a member having good heat conductivity through a flexible adhesive layer, said oscillator generating an oscillating output of a frequency corresponding to said frequency characteristic of said surface acoustic wave device, and a first antenna coupled to said oscillator for transmitting said oscillating output; and

    a receiving section including a second antenna for receiving the output of said first antenna, a means for detecting the oscillation frequency of said oscillator from the output of said second antenna, and a signal processing circuit for processing the output of said detecting means.

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