An Improved Piezoelectric Chip Type Ultrasonic Transducer

Abstract

The invention relates to a transducer structure, aiming to provide an improved piezoelectric wafer type ultrasonic transducer. The transducer includes multiple sets of ceramic sheets and electrode sheets arranged at intervals, as well as a rear cover and a front cover at both ends of the head and tail, and a prestressed screw passes through the center; the rear cover, ceramic sheets and electrode sheets are all dimension Consistent ring structure; gaps are provided on the back cover and the ceramic sheet, and welding positions for voltage input cables are provided on the surface of the electrode sheet exposed at the gap. On the premise that the generated ultrasonic vibration intensity is consistent with that of traditional transducers, the present invention can largely reduce the breakage of electrode sheets. By adopting the ring-shaped electrode sheet, the projection range of the electrode sheet is greatly reduced, and the design and application range of the protective shell are more flexible. The area of ​​the welding position of the electrode sheet is increased, thereby increasing the strength of the position, and greatly reducing the probability of electrode sheet fracture.

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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