Improved piezoelectric crystal plate type ultrasonic transducer

Abstract

The invention relates to a structure of a transducer, and aims to provide an improved piezoelectric crystal plate type ultrasonic transducer. The transducer comprises a plurality of groups of ceramic pieces and electrode pieces, a rear cover plate and a front cover plate, the ceramic pieces and the electrode pieces are arranged at intervals, the rear cover plate and the front cover plate are arranged at the head end and the tail end of the transducer, and a pre-stressing screw penetrates the center of the transducer; the rear plate, the ceramic pieces and the electrode pieces are of annular structures with consistent sizes, gaps are formed in the rear cover plate and the ceramic pieces, and the surfaces of the electrode pieces exposed out of the gaps are provided with welding positions for voltage input wires to connect. According to the improved piezoelectric crystal plate type ultrasonic transducer provided by the invention, under the precondition that the ultrasonic vibration intensity and a traditional transducer can be kept consistently, and the condition of breaking the electrode pieces can be reduced to a large extent; furthermore, by adopting the annular electrode pieces, the projection scope of the electrode pieces can be greatly reduced, the design and application scope of a protective shell are more flexible, and the area of the electrode piece welding potion can be improved, therefore the intensity of a part can be improved, and the probability of breaking the electrode pieces can be greatly reduced.

Description

technical field [0001] The invention mainly relates to a novel transducer structure, especially an ultrasonic transducer in the form of a piezoelectric wafer. Background technique [0002] Ultrasonic transducer is the core component of ultrasonic equipment. It is an energy conversion device that converts high-frequency electrical energy into mechanical energy (ie, ultrasonic waves). There are usually two types of magnetostrictive transducers and piezoelectric wafer transducers. . The electroacoustic conversion efficiency of the magnetostrictive transducer is relatively low, and it will gradually lose the electroacoustic conversion ability after being used for a certain period of time, so it is less used. [0003] At present, the relatively mature and reliable piezoelectric transducer mainly uses the piezoelectric effect of the piezoelectric ceramic sheet. Its general structure is as follows: figure 1 As shown, it is composed of a rear cover, a ceramic sheet, an electrode s...

AI Technical Summary

Problems solved by technology

Since the ceramic sheet of the transducer will carry a high unsafe voltage during work, in order to increase safety, a protective shell is usually added to the transducer in actual use. At this time, due to the size of the electrode sheet to the shell Bring restrictions, so that the entire product cannot be made smaller

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