SAW wireless temperature measurement device using surface acoustic wave device

摘要

The present invention relates to a wireless temperature sensor using a SAW element that senses a temperature by detecting a change in resonance frequency that varies depending on physical characteristics of a substrate constituting a SAW element, An SAW element having an IDT for generating surface acoustic waves and a reflector for reflecting surface acoustic waves generated from the IDT and emitting the SAW to the antenna, the SAW element having a vibration characteristic deformed by physical property deformation due to a temperature change; The SAW device generates a transmission signal in a frequency range of the set range and transmits the transmission signal to the SAW device. And a reader for sensing the temperature of the place where the SAW device is installed by detecting the frequency and comparing with a predetermined frequency.;