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Piston energy exchanger

A transducer and piston technology, applied in the field of acoustic sensors, can solve the problems of small amplitude of piston surface and reduced efficiency, and achieve the effect of increasing radiation capacity and improving work efficiency.

Inactive Publication Date: 2007-04-04
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of two piston surfaces, the amplitude of the piston surface on one side of the transducer is relatively small, and the efficiency is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A transducer shell consisting of an asymmetric flexural casing 1, a transition beam 3 and a circular piston radiation head 2 is made of stainless steel. As shown in Figure 1, the asymmetric flexural shell 1 is a short tube with an elliptical cross-section, and the two ends of the tube are not closed, and the ratio of the tube length to the major axis of the elliptical section should be less than 0.8. The wall thickness of the lower wall 10 of the tube is 5 times that of the upper wall 9 . At the center of the upper wall 9 , the upper wall 9 is rigidly connected to one end of the transition beam 3 , and the other end of the transition beam 3 is rigidly connected to an end surface of the circular piston radiation head 2 . The inner wall of the asymmetric flextensional housing 1 has an inward semicircular protrusion 11 on the left and right sides, and the driving element and the two rigid transition blocks 7 at both ends form the assembly unit of the transducer inner cavit...

Embodiment 2

[0024] In this embodiment, a piezoelectric ceramic stack 8 is used as a driving element. The piezoelectric ceramic stack 8 is formed by bonding rectangular piezoelectric ceramic sheets, and the ceramic sheets are connected in parallel in circuit form. The prestressing method of the piezoelectric ceramic stack 8 is the same as that of the first embodiment.

[0025] Other parts of this embodiment are identical to Embodiment 1.

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Abstract

A piston-type energy transducer with high radiation power and efficiency is composed of an asymmetric stretching casing which is a short elliptical tube with thick upper wall and thin lower wall, a drive element in said casing and connected rigidly to the inner surface of casing, a piston-type radiation head, and a transition beam connected rigidly between the upper wall of casing and the piston-type radiation head. The vibration of piston-type radiation head is caused by the vibration at the web point of casing.

Description

technical field [0001] The invention belongs to the field of acoustic sensors, in particular, the invention relates to a piston transducer. Background technique [0002] At present, the widely used piston transducer is the Tonpilz transducer, which has the characteristics of obtaining a large sound energy density with a small weight and volume and is easy to deploy. It is widely used in underwater acoustics and ultrasonic technology. However, such a longitudinal vibration transducer is suitable for medium and high frequencies. If it is applied to a low frequency band, the size and weight of the transducer are relatively large, which is not conducive to application. Henrik Borg, Anders Svensson, and Daniel Johansson proposed a piston-type hydroacoustic transducer that is conducive to driving the radiating surfaces on both sides of the flextensional shell in 2001. The basic idea is to combine the mechanical conversion properties of a flextensional shell with the acoustical ad...

Claims

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Application Information

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IPC IPC(8): B06B1/00B06B1/08B06B1/06
Inventor 刘永平莫喜平
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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