Sine force online calibration device based on piezoelectric ceramics

Abstract

The invention discloses a sine force online calibration device based on piezoelectric ceramics. The calibration device and the calibrated sensor are integrated between a first part and a second part.The calibration device comprises a force transmission block, a standard force sensor, a piezoelectric stack and a locking mechanism. The force transmission block, the standard sensor and the piezoelectric stack are stacked and fixed in turn. The force transmission block is arranged between the calibrated sensor and the standard sensor. The locking mechanism locks the first part and the second part. The calibration device and the calibrated sensor are integrated on the calibrated equipment, the calibrated sensor does not need to be detached in calibration and in-situ online calibration can be performed on the calibrated sensor so that the calibration efficiency of the sensor can be enhanced, the influence of the working environment on the performance of the calibrated sensor is also fused in calibration and the calibration accuracy can be enhanced.

Description

technical field [0001] The invention relates to the field of on-line calibration sensors, in particular to an on-line calibration device for sinusoidal force based on piezoelectric ceramics that can be integrated on equipment to be calibrated. Background technique [0002] The sinusoidal pressure signal is the most commonly used periodic signal in dynamic pressure calibration, through which the amplitude-frequency characteristics and phase-frequency characteristics of the pressure sensor can be obtained very accurately. [0003] CN200810240985.X discloses a dynamic pressure calibrator based on piezoelectric ceramic technology, including resonant pipeline, piezoelectric stack and voltage excitation circuit, voltage excitation circuit includes sinusoidal voltage signal generator, power amplifier and LC resonance circuit, LC resonance The output end of the circuit is connected to the piezoelectric stack, the piezoelectric stack is placed at the bottom of the resonant pipe, and ...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the sensor to be calibrated needs to be removed from the equipment, and then installed on the pressure calibrator for calibration, and it is impossible to perform online calibration without removing the sensor to be calibrated

For the case where the calibrated sensor is integrated between two parts of the calibrated device as a connection (such as a sensor that measures the force between adjacent mechanisms on the manipulator), it is very difficult to disassemble the calibrated sensor

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