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1. (WO2018221231) TEMPERATURE MEASUREMENT DEVICE USING STRAIN GAUGE

Pub. No.:    WO/2018/221231    International Application No.:    PCT/JP2018/019017
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri May 18 01:59:59 CEST 2018
IPC: G01K 5/52
Applicants: MINEBEA MITSUMI INC.
ミネベアミツミ株式会社
Inventors: SATO Satoshi
佐藤 聡
KOBAYASHI Masateru
小林 正輝
Title: TEMPERATURE MEASUREMENT DEVICE USING STRAIN GAUGE
Abstract:
Provided is a device for measuring the temperature of a metal object without being affected by the environmental temperature. A first aspect of the present invention is a device for measuring the temperature of a metal object using at least one strain gauge, wherein the at least one strain gauge is affixed to the metal object, and the linear coefficient of expansion of the strain gauge differs from the linear coefficient of expansion of the metal object. A second aspect of the present invention is a device for measuring the temperature of a metal object using two strain gauges, wherein the two strain gauges are affixed to the metal object, the two strain gauges have the same grid direction, the two strain gauges are used to form a Wheatstone bridge circuit, the linear coefficient of expansion of a first strain gauge among the two strain gauges is greater than the linear coefficient of expansion of the metal object, and the linear coefficient of expansion of a second strain gauge among the two strain gauges is less than the linear coefficient of expansion of the metal object.