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Piezoelectric vibrator based on shear vibration and flexural vibration, flexural transducer and manufacturing method of flexural transducer

A piezoelectric vibrator and shear vibration technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, etc. Solve problems such as the reduction of shear modulus, and achieve the effect of improving performance, improving operating distance, detection accuracy, and high-voltage electric constant.

Active Publication Date: 2018-09-04
BEIJING INFORMATION SCI & TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The piezoelectric strain constant d of the piezoelectric material 15 and permittivity did not decrease, while the piezoelectric voltage constant e 15 and shear modulus are reduced by 90%

Method used

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  • Piezoelectric vibrator based on shear vibration and flexural vibration, flexural transducer and manufacturing method of flexural transducer
  • Piezoelectric vibrator based on shear vibration and flexural vibration, flexural transducer and manufacturing method of flexural transducer
  • Piezoelectric vibrator based on shear vibration and flexural vibration, flexural transducer and manufacturing method of flexural transducer

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Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described below through specific embodiments and accompanying drawings.

[0035] 1. Structure of piezoelectric vibrator based on shear vibration

[0036] The piezoelectric vibrator structure based on shear vibration and flexural vibration of the present invention is composed of active material, ie piezoelectric material, and passive material, ie non-piezoelectric material. Such asfigure 1 As shown, in this embodiment, the vibrator is composed of three parts: adjustable prestressed screw 1 , vibration transition bracket 2 , and flexural shell 3 , which are non-piezoelectric materials and piezoelectric materials, namely piezoelectric ceramics 4 . The piezoelectric ceramics polarized positively along the x-axis and the piezoelectric ceramics polarized negatively along the x-axis are alternately arranged and bonded along...

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Abstract

The invention relates to a piezoelectric vibrator based on shear vibration and flexural vibration, a flexural transducer and a manufacturing method of the flexural transducer. According to the piezoelectric vibrator based on shear vibration and flexural vibration, the flexural transducer and the manufacturing method of the flexural transducer, with the limitations of the application of a d33 modeby a conventional 1-3 piezoelectric composite transducer eliminated, a d15 mode with a higher piezoelectric constant and an electromechanical coupling coefficient is selected to act as a vibration element; in order to avoid the defect of the shear vibration generation of the d15 mode, the shear vibration of the d15 mode is transformed to the flexural vibration of the upper surface and lower surface of a flexural shell through a special structural design, so that the shear vibration mode can be adopted to generate transverse waves; a low-frequency, high-power and small-sized transducer which ismanufactured on the basis of the d15 mode meets requirements such as underwater long-distance communication and detection. In the underwater sound field, the piezoelectric vibrator based on shear vibration and flexural vibration can improve the working distance and detection accuracy of a sonar system, and provide effective help for military detection, early warning, civil navigation, fishing andthe like.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric transducers, in particular to a piezoelectric vibrator based on shear vibration and flexural vibration, a flexural transducer and a manufacturing method thereof. Background technique [0002] Piezoelectric composite materials, as the core sensitive materials of transducers, have undergone rapid development for nearly half a century. Because it not only has the performance of piezoelectric phase materials but also can improve the comprehensive performance of materials by adding polymer phases, it has an irreplaceable role in ultrasonic nondestructive testing, geological detection, underwater sonar, etc. [0003] The shear vibration mode of piezoelectric ceramics is one of the typical vibration modes. The polarization direction and the electric field direction are vertically distributed, and shear deformation occurs in the plane formed by the polarization direction and the electric field direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/08H01L41/04H01L41/23H01L41/053H01L41/113H10N30/00H10N30/02H10N30/30H10N30/80H10N30/88
CPCH10N30/80H10N30/886H10N30/00H10N30/30H10N30/02
Inventor 秦雷贾俊博仲超谷传欣廖擎玮王丽坤
Owner BEIJING INFORMATION SCI & TECH UNIV
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