Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A flextensional transducer using a PVDF piezoelectric film

A flextensional transducer and piezoelectric film technology, which can be used in instruments, sound-producing instruments, etc., can solve problems such as inability to meet needs, and achieve the effects of improving energy conversion efficiency, low weight, and improving emission capability.

Active Publication Date: 2014-03-19
武汉国科舰航传感科技有限公司
View PDF2 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with the continuous increase of the transmitting power of the transducer and the reduction of the resonance frequency, the existing flextensional transducer can no longer meet the needs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A flextensional transducer using a PVDF piezoelectric film
  • A flextensional transducer using a PVDF piezoelectric film
  • A flextensional transducer using a PVDF piezoelectric film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be further described below through specific embodiments and accompanying drawings.

[0032] figure 1 It is a schematic diagram of the structure of the flextensional transducer using PVDF piezoelectric film in this embodiment, including polyvinylidene fluoride (PVDF) film 1, positively polarized piezoelectric ceramic sheet 2, metal gasket 3, reverse electrode Piezoelectric ceramic sheet 4, mass block 5, fixed block 6, fixed screw 7, tension screw 8 and prestressed screw 9. Among them, the positively polarized piezoelectric ceramic sheet 2, the metal spacer 3 and the reversely polarized piezoelectric ceramic sheet 4 together constitute a piezoelectric ceramic chip stack, and the electrodes are drawn out through the metal spacer, and all the positive electrodes are connected to each other, and the negative electrodes are connected to each other. The PVDF film 1 forms a closed cavity and wraps the stack of piezoelectric ceramic wafers. Its three-...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a flextensional transducer using a PVDF piezoelectric film. The flextensional transducer comprises a piezoelectric ceramic wafer stack and a PVDF film. The PVDF film surrounds the piezoelectric ceramic wafer stack. A connecting piece is arranged between the PVDF film and the piezoelectric ceramic wafer stack. The flextensional transducer further comprises a device for enabling the PVDF film to generate prestress. The metallic housing of a conventional flextensional transducer is replaced by the PVDF film. The PVDF film and the piezoelectric ceramic wafer stack are used as sensitive elements. The PVDF film uses a film flexural vibration mode under a simple boundary condition. The piezoelectric ceramic wafer stack uses a longitudinal vibration mode. A wide bandwidth can be acquired by mode coupling so as to achieve broadband transmission sound waves. The flextensional transducer has characteristics of low frequency, a wide band, high receiving sensitivity, large acoustic radiation power, and horizontal omnidirectional directivity.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic detection, and in particular relates to a novel flexural transducer which utilizes a PVDF piezoelectric film to replace the metal shell of the flexural transducer and utilizes the piezoelectric effect to send and receive signals to realize underwater detection. Background technique [0002] The flextensional transducer (flextensional transducer for short) is a compact underwater acoustic detection transducer that can obtain low-frequency, high-power and broadband acoustic signals. The shell is usually a curved body of inversion, a curved body of revolution, or an ellipse in translation. The working principle of the flextensional transducer is: use the longitudinal stretching vibration of the piezoelectric ceramic chip stack to excite the shell to perform bending vibration, and couple into a bending and stretching vibration mode. Effective low-frequency radiation can be obtained from t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G10K9/122
Inventor 秦雷王丽坤刘静静
Owner 武汉国科舰航传感科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com