| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic quantity sensor system capable of discrimination of existence of a sensor or an individual body, normal operation diagnosis, compensation to a temperature change, and management of a plurality of sensors, concerning a dynamic quantity sensor system requiring continuous sensing. SOLUTION: A sensor element 101 comprising a surface elastic wave resonator having an interdigital electrode and a reflector formed on a piezoelectric substrate, and a vibration sensor 102 comprising an antenna 120 are installed on a measuring object in a measuring domain, and an interrogator 103 for transmitting by radio a carrier wave signal to the vibration sensor 102 and monitoring a reflected wave from the vibration sensor 102 is installed. The interrogator 103 comprises a reference signal generation part 104 for generating a signal having a carrier wave frequency used as a reference, a frequency modulation part 105 for generating a signal whose frequency is changed continuously and periodically around the reference frequency of the carrier wave signal, an antenna 108, a signal receiving part 109, a signal processing part 110, and a determination output part 111. COPYRIGHT: (C)2008,JPO&INPIT
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