WIRELESS SURFACE ACOUSTIC WAVE SENSOR

PROBLEM TO BE SOLVED: To provide an inexpensive, small, and power-saving sensor, capable of wirelessly detecting the stress applied to a target portion or distortions due to the stress. SOLUTION: In this surface acoustic wave sensor, comprising a transponder including a surface acoustic wave element...

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Bibliographische Detailangaben
Hauptverfasser:	OKAZAKI SADAKO, SAKURAI HIROSHI, OTANI KEIZO, TAKIGAWA TAKETOSHI, SAKAMOTO HIRONORI, FURUYA YASUBUMI, SHIMADA MUNEKATSU
Format:	Patent
Sprache:	eng
Schlagworte:	MEASURING MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an inexpensive, small, and power-saving sensor, capable of wirelessly detecting the stress applied to a target portion or distortions due to the stress. SOLUTION: In this surface acoustic wave sensor, comprising a transponder including a surface acoustic wave element having a piezoelectric substrate 1 and a comb-tooth electrode 2 and an antenna means 3, and an inquiry device transmitting a drive signal to the transponder and receiving a response signal from the transponder; a magnetostrictive membrane 4 is provided on the piezoelectric substrate 1; and a stress acting on the piezoelectric substrate 1 is wirelessly detected, based on the change in propagation characteristic of surface acoustic wave by the magnetostrictive membrane 4. COPYRIGHT: (C)2008,JPO&INPIT