Vibration sensor high temperature sensitivity absolute calibration method

Abstract

The present invention provides a vibration sensor high temperature sensitivity absolute calibration method. The method includes the following steps that: (1) a high temperature test box is set; (2) the vibration of a standard vibration stage is conveyed to a calibrated vibration sensor in the high temperature test box through a vibration extension rod, the vibration sensor in the high temperature test box senses the vibration signals of the standard vibration stage and generates analog electrical signals, and outputs the analog electrical signals to a data acquisition card, the analog electrical signals are converted into digital signals through the data acquisition card, and the digital signals are inputted to a computer; (3) light of a laser interferometer is emitted onto the calibrated vibration sensor through a glass window on the high temperature test box, the laser interferometer measures the vibration magnitude of the vibration sensor and outputs analog electrical signals, the analog electrical signals are converted into digital signals through the data acquisition card, and the digital signals are inputted to the computer; and (4) the computer calculates the high temperature sensitivity of the vibration sensor. With the vibration sensor high temperature sensitivity absolute calibration method of the invention adopted, the problem of incapability of calibrating a vibration sensor under a high temperature environment can be solved, and the high temperature sensitivity absolute calibration of the vibration sensor can be realized.

Description

technical field [0001] The invention relates to the technical field of vibration measurement, in particular to an absolute calibration method for high temperature sensitivity of a vibration sensor. Background technique [0002] Vibration sensors are widely used in various links in the scientific research, production and testing process of national defense and military industry, and are responsible for monitoring and testing functions under various environmental conditions. It has been found through research that temperature changes have a great influence on the sensitivity of the vibration sensor. This is because most vibration sensors are composed of piezoelectric materials. According to the characteristics of piezoelectric materials, when it works outside the reference working temperature (room temperature), its output Charge sensitivity will vary greatly. The test error caused by the temperature in the high and low temperature environment cannot be ignored, and the sensi...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the current vibration sensor cannot be calibrated in a high temperature environment, the present invention proposes an absolute calibration method for the high temperature sensitivity of the vibration sensor

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