Pre-tightening and anti-loosening mechanism of piezoelectric sensor

Abstract

The invention discloses a pretightening and looseness-preventing mechanism for a piezoelectric sensor and relates to the technical field of measurement. An outer platform is of a hollow cuboid structure with two opposite openings. An inner platform and piezoelectric materials are all arranged in a containing cavity of the outer platform. The two ends of the inner platform are connected with the piezoelectric materials through epoxy resin adhesive. One ends of the piezoelectric materials are each connected with an auxiliary plate through epoxy resin adhesive. The middle of the inner side of the outer platform is provided with blind grooves. The auxiliary plates are matched with the blind grooves correspondingly. Each pretightening column is formed by connecting a clamping groove column, a threaded column and an unthreaded shaft column coaxially and sequentially. The middle of the outer side of the outer platform is provided with threaded blind holes. The outer platform and the pretightening columns are connected in a matched mode through the threaded columns and the threaded blind hole. The unthreaded shaft columns make contact with the auxiliary plates coretsondingly. The two sides of each clamping groove column are each provided with a locking plate. The lower surfaces of the locking plates are fixedly connected with the outer platform through screws. Through the pretightening and looseness-preventing mechanism for the piezoelectric sensor, pretightening and looseness-preventing functions of the piezoelectric sensor can be achieved simultaneously, and adjustment of the magnitude of pretightening force is convenient, stable and accurate.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a pre-tightening and anti-loosening mechanism of a piezoelectric sensor. Background technique [0002] Piezoelectric sensors have the advantages of wide response frequency, high sensitivity, large signal-to-noise ratio, simple structure, reliable operation, light weight, and almost no hysteresis. They are used in the measurement of various dynamic forces, accelerations, mechanical shocks and vibrations, and Acoustics, medicine, mechanics, aerospace and other aspects have been widely used. Piezoelectric sensors are made using the positive piezoelectric effect of piezoelectric materials. The working principle is: when the piezoelectric material is subjected to an external force along a certain direction, a polarization phenomenon will occur inside, and at the same time, it will Charges with opposite signs are generated, and the amount of charge is proportional to the magnitud...

AI Technical Summary

Problems solved by technology

However, when the above two inventions are used for the pre-tightening and anti-loosening of the piezoelectric sensor, there is a problem that it is difficult to adjust the pre-tightening force

To sum up, the current existing technology cannot simultaneously realize the pre-tightening and anti-loosening of the piezoelectric sensor, and cannot meet the four requirements of its pre-tightening device, which makes it difficult for the performance of this type of measuring instrument to achieve the expected high and precise performance. , pointed target

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