High-precision strain measuring technology based on double-channel parametric measurement
Liu Fang · Transducer and Microsystem Technologies · 2011
Perturbing factors and parameters of the unstable circuit elements bring bad effects on the accuracy of strain measurement.Aimed to improve the accuracy,the measuring circuit based on two-channel parametric measurement with resistance strain-gauge half-bridge is designed.The principle of strain measurement is introduced,then the errors of measuring circuits is analyzed.A measuring system based on the principle is developed.The test indicates that linear values are close to the nominal values and the accuracy,stability,anti-interference and reliability are excellent.The approach of analyzing error is worthwhile for other circuits.