| 摘要 |
PROBLEM TO BE SOLVED: To provide a strain/temperature measurement method enabling temperature measurement of high accuracy, while performing strain measurement. SOLUTION: Three lead wires 11 to 13 from a first to a third lead wire among four lead wires 11 to 14 connected to a resistance type strain gage 1 are made of a same material and used for strain measurement, based on the one-gauge three-wire method. A fourth lead wire 14 is made of a different material from the lead wires 11 to 13, and forms a thermocouple 15 with the third lead wire 13. In a state where a bridge power supply voltage is applied to a bridge circuit 32 for the one gauge three-wire method, strain measurement is performed, based on the output voltage e of the bridge circuit 32, and therewith the output voltage et of the bridge circuit 32, and the output voltage et of the thermocouple 15 the generated voltage er of the first lead wire 11 are extracted, and based on the differential voltage (et-er) of the voltages, the temperature of the thermocouple 15 is measured. COPYRIGHT: (C)2007,JPO&INPIT
|
