Development of Strain Sensor Using Oscillator Circuit

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  • 発振回路を用いた新型ひずみセンサーの開発
  • ハッシン カイロ オ モチイタ シンガタヒズミ センサー ノ カイハツ

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Abstract

New type of strain sensor using a CMOS inverter oscillator circuit has been developed. The sensor could omit an amplifier because a counting device measures frequency changes of circuit voltage output caused by resistance changes of a strain gauge. Characteristics and measurement accuracy of the sensor that consists of an oscillator circuit and a strain gauge were confirmed by static tensile tests of specimens. The test results showed that the same level of accuracy as conventional sensor has been achieved by using simple compensation factor assuming of existence of internal resistance on circuit.

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