Piezoelectric patch size measuring device and method

Abstract

The invention discloses a piezoelectric patch size measuring device and method. The upper end face of a measuring platform is provided with a slide testing table, an inclined included angle is formed between the slide testing table and the horizontal plane, the outer side of the end face of the slide testing table is provided with a first laser displacement sensor and a second laser displacement sensor, the first laser displacement sensor and the second laser displacement sensor are opposite to each other so as to measure the diameter size of a piezoelectric patch arranged between the two laser displacement sensors; a third laser displacement sensor is arranged above the slide testing table, and the third laser displacement sensor emits laser and irradiates the end face of the slide testing table so as to measure the thickness size of a piezoelectric patch arranged between the third laser displacement sensor and the end face of the slide testing table; and the numerical value deviation range of two or more diameters is calculated according to a diameter measurement result, and the numerical value deviation range is taken as the roundness of the piezoelectric patch. The same measuring device can simultaneously measure the diameter, the roundness and the thickness of the piezoelectric patch, repeated disassembly and assembly are not needed, the time consumed by measurement is reduced, and the efficiency of piezoelectric patch measurement is improved.

Description

technical field [0001] The invention relates to a piezoelectric sheet measurement technology, in particular to a piezoelectric sheet size measuring device used in a thin-sheet piezoelectric sheet in a transducer. Background technique [0002] A transducer is an energy conversion device that can convert acoustic vibrations and electrical signals into each other, and is widely used in different industries such as industry and national defense. Ultrasonic flowmeter is a flowmeter that uses the principle that the propagation speed of ultrasonic waves in the flowing medium is equal to the vector sum of the average flow velocity of the measured medium and the velocity of sound waves in the static medium. It has small interference to the flow field, high measurement accuracy and anti-interference Strong and other advantages. The transducer is a key component in an ultrasonic flowmeter, mainly used to transmit and receive ultrasonic waves. The key device in the transducer to reali...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that existing piezoelectric sheets used in transducers in ultrasonic flowmeters need to ensure that the piezoelectric sheets used in them have high dimensional accuracy, and are more likely to be impacted or collided during the detection of their dimensions. A piezoelectric sheet size measuring device that can improve the detection accuracy of the piezoelectric sheet, improve the detection efficiency, and reduce or avoid the impact and collision damage of the piezoelectric sheet based on the current situation of defects such as bending deformation.

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