Research on the Dynamic Characteristic Calibration Method of Resistance Strain Sensors

Resistance strain sensors have a wide range of types and applications and are commonly used in industries such as bridge and tunnel construction, building, aerospace, etc., to monitor the structural health of various systems. Therefore, it is essential to reasonably evaluate the dynamic characteristics of resistance strain sensors. This article discusses and analyzes the characteristics of resistance strain sensors and the description of metrological characteristics in relevant domestic and international standards and specifications. Considering the current status of metrological calibration of resistance strain sensors, this paper proposes a method for calibrating the dynamic characteristics of resistance strain sensors using existing vibration measuring devices. This method is based on an existing vibration standard device, where a dynamic signal analyzer collects vibration table signals and strain sensor signals, and analyzes the measurement signals to obtain dynamic sensitivity, thus completing the calibration of the sensor's dynamic characteristics. Experiments have verified the feasibility and good repeatability of this method. Finally, the data processing process is explained, and the uncertainty of the sensor's dynamic sensitivity is evaluated.