A Prestressed Stacked Piezoelectric Tube Transducer
A piezoelectric circular tube and prestressing technology, which is applied in the direction of piezoelectric/electrostrictive transducers, sensors, electrical components, etc., can solve the problems of small beam width, high sensitivity, large vibration energy, etc., and improve reliability , Improve sensitivity, improve the effect of power-to-weight ratio
Active Publication Date: 2017-10-13
BEIJING INFORMATION SCI & TECH UNIV
View PDF4 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0017] In summary, the cylindrical tube structure can obtain horizontal and omnidirectional beam directivity, but since the transducer only vibrates through a single-layer piezoelectric ceramic shell to receive or radiate acoustic signals, obviously its vibration energy is far less than that generated by stacked chips Large, that is, the sensitivity is not as high as that of stacked wafer transducers
The composite rod piezoelectric transducer adopts multiple piezoelectric wafers to be stacked, and the stacked wafers generate greater vibration energy, which makes its emission sensitivity higher, but its radiation surface is a plane, resulting in a beam width of emission directionality ( opening angle) smaller
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0039] figure 1 A structural schematic diagram of a prestressed stacked multi-layer circular tube piezoelectric transducer is given in an embodiment of the present invention, the piezoelectric transducer includes a stacked piezoelectric circular tube 1, a bracket 2, electrode leads 3, and a cable 4 , Waterproof and sound-permeable layer 5, end cap 6, gasket 7, glass fiber 8 and lining pipe 9.
[0040] Wherein, the stacked piezoelectric circular tube 1 and inner liner tube 9 constitute the stacked layers of the device, such as figure 2 As shown, it is a coaxial cylindrical shell, image 3 It is a cross-sectional view of stacked multi-layer circular tubes. The innermost liner tube 9 is a complete thin-walled tube made of heat-shrinkable and cold-expandable material, and the piezoelectric round tubes 1 of the outer three layers are all made of two se...
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
Login to View More Abstract
The present invention provides a prestressed stacked piezoelectric circular tube transducer, which includes a liner tube, a stacked multi-layer piezoelectric tube sleeved on the outside of the liner tube, and the stacked multi-layered piezoelectric tube A device for applying prestress to a piezoelectric circular tube. The present invention adopts stacking of multiple stacked piezoelectric round tubes, and the vibration of the vibrator is the superposition of the radial vibration of multiple round tubes to improve the sensitivity of the transducer; since the radii of each round tube are not equal, the resonance of each tube The frequency is different, so that the transducer vibration system has a variety of vibration modes, which can expand the working frequency band of the transducer; the structure of the cylindrical tube is applied, so that the transducer can obtain horizontal and omnidirectional beam directivity; glass fiber winding is used Piezoelectric circular tubes are stacked, and prestress is applied to increase the power that the piezoelectric transducer can carry, thereby improving the reliability of the transducer.
Description
technical field [0001] The invention belongs to the technical field of underwater acoustic detection, and in particular relates to a transducer for underwater detection that adopts multilayer piezoelectric ceramic circular tubes and prestressed stacks to realize the emission and reception of underwater acoustic signals. The transducer can be widely used in underwater communication, detection, target positioning, tracking, etc., and is an important part of sonar. Background technique [0002] The underwater acoustic transducer is a device that converts sound energy and electrical energy into each other. Its status is similar to the antenna in radio equipment, and it is a key device for transmitting and receiving sound waves underwater. Underwater detection, identification, communication, as well as marine environment monitoring and the development of marine resources are inseparable from underwater acoustic transducers. Transducers can be divided into transmitting type, rece...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04R17/00H04R1/32
Inventor 王丽坤秦雷张彬仲超
Owner BEIJING INFORMATION SCI & TECH UNIV