CN211295149U - Composite ceramic structure for radial coupling-free high-frequency piezoelectric transducer - Google Patents
Composite ceramic structure for radial coupling-free high-frequency piezoelectric transducer Download PDFInfo
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- CN211295149U CN211295149U CN202020112705.3U CN202020112705U CN211295149U CN 211295149 U CN211295149 U CN 211295149U CN 202020112705 U CN202020112705 U CN 202020112705U CN 211295149 U CN211295149 U CN 211295149U
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- 239000000919 ceramic Substances 0.000 title claims abstract description 43
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000008187 granular material Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 4
- 230000005684 electric field Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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Abstract
The utility model provides a there is not radial coupling high frequency composite ceramic structure for piezoelectric transducer, piezoelectric ceramic combined material has single thickness vibration mode, and its structure includes a plurality of columnar piezoceramics granules to and anodal rete and negative pole rete, piezoceramics granule polarity orientation the same interval is arranged on the coplanar, mutual independence between the adjacent piezoceramics granule and form the space each other, all positive terminals of piezoceramics granule are pasted on same anodal rete, and all negative pole end are pasted on same negative pole rete. The piezoelectric ceramic composite material obtains a unique thickness vibration mode, and radial vibration modes around the thickness vibration mode and in a low frequency band are removed.
Description
Technical Field
The utility model relates to a transducer technical field especially relates to a no radial coupling high frequency piezoelectric transducer uses composite ceramic structure with single thickness vibration mode.
Background
The piezoelectric ceramic is an information functional ceramic material which can convert mechanical energy and electric energy into each other by using a piezoelectric effect. The preparation of the quasi 1-3 composite piezoelectric transducer published in the acoustic technology indicates that the conventional piezoelectric ceramic composite material is mostly made by cutting ceramic wafers into closely-arranged long-strip cylindrical ceramic particles, and then pouring epoxy resin material into the cutting seams to stick the ceramic particles. The vibration mode is single, the transverse coupling is small, the acoustic impedance is low, the frequency band is wide, and the like, and the vibration mode is widely applied. But still have some radial vibration modes.
In some application environments, it is desirable to obtain a unique thickness vibration mode, rather than a radial vibration mode. For example: the parametric array technology in the sonar field utilizes a relatively high frequency and a relatively wide bandwidth, and adds a frequency modulation signal to generate a low-frequency component, such as: the 150K +/-10K parametric array generates a 20K difference frequency signal, and the low-frequency signal has strong penetration capacity and can penetrate through the seabed to measure the sectional structure of the seabed bottom layer. This requires that both high power radiation is generated in the high frequency region of 150K and good reception performance is obtained in the low frequency region of 20K, so that in this case, no radial vibration is possible in the low frequency region. The conventional piezoelectric ceramic composite material adopting epoxy resin material for crack pouring has the radial vibration exactly in the low-frequency region, which cannot meet the requirement of the radial vibration in the low-frequency state.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: in order to overcome the deficiencies in the prior art, the utility model provides a no radial mode's no radial coupling high frequency piezoelectric transducer uses composite ceramic structure.
The utility model provides a technical scheme that its technical problem will adopt is: the utility model provides a no radial coupling high frequency piezoelectric transducer of no radial mode uses composite ceramic structure, includes a plurality of columnar piezoceramics granule to and positive rete and negative pole rete, piezoceramics granule polarity orientation the same interval is arranged on the coplanar, can be that the positive pole is last, and the negative pole is under, also can the positive pole be under, and the negative pole is used in last reverse, mutually independent and form the space each other between the adjacent piezoceramics granule, all positive terminals of piezoceramics granule are pasted on same positive rete, and all negative terminals are pasted on same negative pole rete.
Preferably, the positive electrode film layer and the negative electrode film layer are both made of conductive metal films, such as: gold foil, silver foil, copper foil, etc. may be used.
Since the larger the radial size of the ceramic particles, the more significant the radial vibration in the low frequency region, therefore, in order to obtain a better single thickness vibration mode, it is preferable that the size range of the piezoelectric ceramic particles is: 0.5 × 0.5 to 20 × 50, unit: mm; preferably, the spacing between the particles is no greater than half a wavelength, depending on the operating band.
Furthermore, in order to facilitate connection of external signals, signal wires are welded on the positive electrode film layer and the negative electrode film layer.
Specifically, the working frequency of the composite ceramic structure is 50 kHz-5 MHz.
The utility model has the advantages that: the utility model provides a pair of no radial mode's no radial coupling high frequency composite ceramic structure for piezoelectric transducer, piezoceramics combined material directly adopt interval distribution's ceramic particle, form the space, make between the piezoceramics particle be mutually independent, obtain an only thickness vibration mode, have removed at the peripheral radial vibration mode of thickness vibration mode.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic view of the piezoelectric ceramic composite material of the present invention.
Fig. 2 is a schematic sectional view of a-a in fig. 1.
In the figure: 1. 2 positive electrode film layers, 3 gaps, 4 piezoelectric ceramic particles and 4 negative electrode film layers.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
As shown in fig. 1 and fig. 2, the utility model discloses a no radial modal no radial coupling high frequency composite ceramic structure for piezoelectric transducer, including a plurality of columnar piezoceramics granule 3 to and anodal rete 1 and negative pole rete 4, 3 polarity orientation of piezoceramics granule arrange at the interval on the coplanar the same, can be that the positive pole is last, and the negative pole is under, also can the positive pole down, and the negative pole is used in the reverse direction at last, and the positive pole is taken as an example at last in this embodiment, mutually independent and each other between the adjacent piezoceramics granule 3 form space 2, all positive terminals of piezoceramics granule 3 are pasted on same anodal rete 1, and all negative terminals are pasted on same negative pole rete 4. Signal wires are welded on the anode film layer 1 and the cathode film layer 4. The positive electrode film layer 1 and the negative electrode film layer 4 are made of conductive metal films, for example: gold foil, silver foil, copper foil, etc. may be used. The columnar piezoelectric ceramic particles 3 are formed by cutting a whole piece of piezoelectric ceramic, and since the larger the radial size of the ceramic particles is, the more obvious the radial vibration in the low frequency region is, in order to obtain a better single thickness vibration mode, it is preferable that the size range of the piezoelectric ceramic particles 3 is: 0.5 × 0.5 to 20 × 50, unit: mm; preferably, the spacing between the particles is no greater than half a wavelength, depending on the operating band. The working frequency of the composite ceramic structure is between 50kHz and 5 MHz.
The working principle is as follows:
an alternating electric field is generated between the positive electrode film layer and the negative electrode film layer through the signal wire, and the columnar piezoelectric ceramic particle 3 array generates mechanical vibration corresponding to the frequency of the driving electric field under the action of the electric field, so that the medium is pushed to generate sound waves. The gaps 2 among the columnar ceramic particles isolate the transverse extrusion among the ceramics, and macroscopically, the ceramics are changed into a unidirectional elastic vibrating body from an isotropic elastomer. Thus eliminating the radial elastic mode.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a no radial coupling high frequency composite ceramic structure for piezoelectric transducer which characterized in that: the composite ceramic structure has a single-thickness vibration mode, and the structure comprises a plurality of columnar piezoelectric ceramic particles, an anode film layer and a cathode film layer, wherein the polarity orientation of the piezoelectric ceramic particles is arranged on the same plane at intervals, the adjacent piezoelectric ceramic particles are mutually independent and form gaps with each other, all anode ends of the piezoelectric ceramic particles are pasted on the same anode film layer, and all cathode ends are pasted on the same cathode film layer.
2. The composite ceramic structure for a non-radially-coupled high-frequency piezoelectric transducer according to claim 1, wherein: the positive electrode film layer and the negative electrode film layer are both made of conductive metal films.
3. The composite ceramic structure for a non-radially-coupled high-frequency piezoelectric transducer according to claim 2, wherein: the size range of the piezoelectric ceramic particles is as follows: 0.5 × 0.5 to 20 × 50, unit: mm.
4. The composite ceramic structure for a non-radially-coupled high-frequency piezoelectric transducer according to claim 1, wherein: and signal wires are welded on the anode film layer and the cathode film layer.
5. The composite ceramic structure for a high-frequency piezoelectric transducer without radial coupling according to claim 3, wherein: the working frequency of the composite ceramic structure is between 50kHz and 5 MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020112705.3U CN211295149U (en) | 2020-01-17 | 2020-01-17 | Composite ceramic structure for radial coupling-free high-frequency piezoelectric transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020112705.3U CN211295149U (en) | 2020-01-17 | 2020-01-17 | Composite ceramic structure for radial coupling-free high-frequency piezoelectric transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211295149U true CN211295149U (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020112705.3U Active CN211295149U (en) | 2020-01-17 | 2020-01-17 | Composite ceramic structure for radial coupling-free high-frequency piezoelectric transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211295149U (en) |
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2020
- 2020-01-17 CN CN202020112705.3U patent/CN211295149U/en active Active
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