Piezoelectric sensor calibrating device and method

Abstract

The invention discloses a piezoelectric sensor calibrating method. The method comprises the following steps of: putting a piezoelectric sensor to be calibrated into a cylinder; inflating air into the cylinder through an aerostatic press, wherein the pressure value of inflated air is displayed synchronously by a pressure meter, and water in the cylinder generates a dynamic water pressure under theaction of the dynamic air pressure; according to the dynamic water pressure, outputting a voltage value by the piezoelectric sensor in the cylinder and displaying the fluctuation and change of the voltage data in real time by an oscilloscope; according to the voltage data displayed by the oscilloscope, forming a group of output-input data by corresponding to the pressure value displayed by the pressure meter at that time; generating a high-frequency signal by a signal generator for controlling a control valve so as to regulate the pressure value input by the aerostatic press and obtain multiple groups of the output-input data; establishing a functional relationship between the input data and the output data; and realizing the calibration for the piezoelectric sensor. The method can accurately, simply and conveniently calibrate the piezoelectric sensor in a specific working environment. The invention also provides a piezoelectric-sensor-calibrating device.

Description

technical field [0001] The invention relates to a calibration method of a piezoelectric sensor for detecting ultra-static pore water pressure, which can accurately calibrate any small-volume piezoelectric sensor, and can also calibrate an optical fiber Bragg grating ultra-static pore water pressure sensor. Background technique [0002] The calibration of the sensor is to use a standard device to generate a known non-electric quantity (such as standard force, displacement, etc.) as an input to the sensor to be calibrated to obtain the output of the sensor, and then compare the input and output of the sensor Quantitatively build relationships. The calibration of the sensor in the engineering test should be carried out in an environment similar to its use conditions to obtain higher accuracy. [0003] Calibration of piezoelectric transducers and pressure transducers usually uses the shock response method. The impact response method has the characteristics of less equipment ...

AI Technical Summary

Problems solved by technology

However, the calibration of the sensor in the engineering test should be carried out in an environment similar to its use conditions. However, the impact response method cannot effectively simulate the actual use of the sensor on the road, and the calibration results cannot truly reflect the performance of the piezoelectric sensor. There is a certain gap in usage

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