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Device and system for monitoring internal temperature of inaccessible or moving parts

  • US 6,964,518 B1
  • Filed: 03/23/2000
  • Issued: 11/15/2005
  • Est. Priority Date: 03/26/1999
  • Status: Expired due to Term
First Claim
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1. A device for measuring temperature of the inside of an inaccessible movable mechanical part, comprising:

  • a temperature-sensitive element from which a measurement of temperature can be obtained and having a SAW chip with temperature-dependent transfer function, the SAW chip having a transducer designed to be connected to an antenna mounted on an outside of said mechanical part,an encapsulation for said temperature-sensitive element, the encapsulation being designed to be arranged separately and kept in position at an inner end of a mounting hole in said moving mechanical part and thus exposed to temperature inside the mechanical part,a bolt for closing the mounting hole and a material placed between said bolt and the encapsulation for holding the encapsulation securely in position after mounting, anda transmission line for connecting the antenna to the temperature-sensitive element,whereby the device is adapted for measuring temperature inside the inaccessible mechanical part while the mechanical part is in motion.

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