CN203642937U - Piezoelectric ceramics-based high-sensitivity sensor - Google Patents
Piezoelectric ceramics-based high-sensitivity sensor Download PDFInfo
- Publication number
- CN203642937U CN203642937U CN201320850688.3U CN201320850688U CN203642937U CN 203642937 U CN203642937 U CN 203642937U CN 201320850688 U CN201320850688 U CN 201320850688U CN 203642937 U CN203642937 U CN 203642937U
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- piezoelectric ceramic
- ceramic piece
- negative pole
- sensor
- electrode area
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- 239000000919 ceramic Substances 0.000 title claims abstract description 47
- 239000004033 plastic Substances 0.000 claims abstract description 15
- 125000006850 spacer group Chemical group 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model belongs to the field of ultrasonic sensors, and particularly relates to a piezoelectric ceramics-based high-sensitivity sensor. The piezoelectric ceramics-based high-sensitivity sensor comprises a housing, an inner part of the housing is a cavity, a piezoelectric ceramic piece is located on the bottom of the cavity and fixedly connected to the bottom of the housing, the sensor also comprises a plastic frame, one side of the plastic frame is provided with contact pins, the other side is provided with a PCB, and the contact pins are connected with the PCB. The sensor is characterized in that an upper surface of the piezoelectric ceramic piece is divided into a positive electrode area, a negative electrode area and a spacer area arranged between the positive electrode area and the negative electrode area, a lower surface of the piezoelectric ceramic piece is also provided with a lower negative electrode area, the negative electrode area of the upper surface is communicated with the lower negative electrode area of the lower surface, and the area of the positive electrode area is larger than that of the negative electrode area. The piezoelectric ceramics-based high-sensitivity sensor reduces load, reduces attenuation of signals of the piezoelectric ceramic sensor, and improves the sensitivity of the sensor.
Description
Technical field
The utility model belongs to ultrasonic sensor field, particularly a kind of based on piezoelectric ceramics high sensor.
Background technology
Along with the development of electron trade, the application of ultrasonic sensor is more and more wider, type is also more and more, various Novel ultrasonic wave sensors are also progressively developed, and automotive automation degree is more and more higher, to sensor requirement also more and more higher, the one that the present invention designs mainly for automobile automated parking system is based on piezoelectric ceramics high sensor.
The negative pole of traditional piezoceramic transducer and positive pole are all and the front of piezoelectric ceramic piece, and both areas are identical, respectively account for the general of piezoelectric ceramic piece front, because negative pole area is larger, cause the load of piezoceramic transducer larger, there is decay in the signal of piezoceramic transducer, the sensitivity of sensor is poor, cannot meet the requirement of automated parking system.
Utility model content
For the deficiencies in the prior art, the positive pole of the utility model to piezoceramic transducer and the structure of negative pole are improved, reduce the area that negative pole is positioned at piezoelectric ceramic piece front, increase the anodal area that is positioned at piezoelectric ceramic piece front, reduce load, reduce the decay of piezoceramic transducer signal, the sensitivity that has improved sensor.
The utility model is achieved through the following technical solutions:
A kind of based on piezoelectric ceramics high sensor, it comprises shell, enclosure is a cavity, piezoelectric ceramic piece is located at the bottom of cavity and is fixedly connected on the bottom of shell, also comprise a plastic processing frame, one side of plastic processing frame is provided with contact pin, opposite side is provided with pcb board, contact pin is connected with pcb board, described pcb board is connected with the positive pole of piezoelectric ceramic piece by positive signal line, pcb board is connected with the negative pole of piezoelectric ceramic piece by negative signal line, plastic processing frame is connected to the end of shell, it is characterized in that: the upper surface of described piezoelectric ceramic piece is divided into positive polar region, negative pole district and be arranged on positive polar region and negative pole district between spacer region, the lower surface of described piezoelectric ceramic piece is also provided with lower negative pole district, upper surface negative pole district be communicated with the lower negative pole district of lower surface, the area of described positive polar region is greater than the area in negative pole district.
Further, between described plastic processing frame and shell, be also provided with rubber ring.
Further, described cavity inside is also provided with noise reduction sponge, and described noise reduction sponge is pressed the surface that is attached to piezoelectric ceramic piece.
Further, in described cavity, be filled with fluid sealant.
In sum, the utlity model has following beneficial effect:
The positive pole of the utility model to piezoceramic transducer and the structure of negative pole are improved, reduce the area that negative pole is positioned at piezoelectric ceramic piece front, increase the anodal area that is positioned at piezoelectric ceramic piece front, reduce load, reduce the decay of piezoceramic transducer signal, the sensitivity that has improved sensor.
Brief description of the drawings
By the detailed description below in conjunction with accompanying drawing, the utility model is aforesaid will be become apparent with other object, feature and advantage.Wherein:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the front schematic view of piezoelectric ceramic piece;
Fig. 3 is the reverse side schematic diagram of piezoelectric ceramic piece;
Fig. 4 is the cut-open view of piezoelectric ceramic piece;
In figure, 1 is shell, and 2 is rubber ring, and 3 is plastic processing frame, and 4 is contact pin, and 5 is fluid sealant, and 6 is noise reduction sponge, and 7 is piezoelectric ceramic piece, and 11 is cavity, and 8 is pcb board, and 72 is negative pole district, and 73 is spacer region, and 74 is positive polar region, and 75 is lower negative pole district.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
One is as shown in Figures 1 to 4 based on piezoelectric ceramics high sensor, it comprises shell 1, shell 1 inside is a cavity 11, piezoelectric ceramic piece 7 is located at the bottom of cavity 11 and is fixedly connected on the bottom of shell 1, also comprise a plastic processing frame 3, one side of plastic processing frame 3 is provided with contact pin 4, opposite side is provided with pcb board 8, contact pin 4 is connected with pcb board 8, described pcb board 8 is connected with the positive pole of piezoelectric ceramic piece 7 by positive signal line, pcb board 8 is connected with the negative pole of piezoelectric ceramic piece 7 by negative signal line, plastic processing frame 3 is connected to the end of shell 1, it is characterized in that: the upper surface of described piezoelectric ceramic piece 7 is divided into positive polar region 74, negative pole district 72 and be arranged on positive polar region and negative pole district between spacer region 73, the lower surface of described piezoelectric ceramic piece is also provided with lower negative pole district 75, upper surface negative pole district 72 be communicated with the lower negative pole district 75 of lower surface, the area of described positive polar region 74 is greater than the area in negative pole district 72.
Further, between described plastic processing frame 3 and shell 1, be also provided with rubber ring 2, the rubber ring of setting has been realized flexibly connecting between sensor and car crust, can reduce sensor and automobile and produce resonance, reduces the blind area of sensor.
Further, described cavity inside is also provided with noise reduction sponge 6, and described noise reduction sponge 6 is pressed the surface that is attached to piezoelectric ceramic piece.
Further, in described cavity 11, be filled with fluid sealant 5.
In sum, the utlity model has following beneficial effect:
The positive pole of the utility model to piezoceramic transducer and the structure of negative pole are improved, reduce the area that negative pole is positioned at piezoelectric ceramic piece front, increase the anodal area that is positioned at piezoelectric ceramic piece front, reduce load, reduce the decay of piezoceramic transducer signal, the sensitivity that has improved sensor.
The utility model is not limited to described embodiment; those skilled in the art is not departing from spirit of the present utility model openly in scope; still can do some corrections or change, therefore the scope that rights protection scope of the present utility model limits with claims is as the criterion.
Claims (4)
1. one kind based on piezoelectric ceramics high sensor, it comprises shell, enclosure is a cavity, piezoelectric ceramic piece is located at the bottom of cavity and is fixedly connected on the bottom of shell, also comprise a plastic processing frame, one side of plastic processing frame is provided with contact pin, opposite side is provided with pcb board, contact pin is connected with pcb board, described pcb board is connected with the positive pole of piezoelectric ceramic piece by positive signal line, pcb board is connected with the negative pole of piezoelectric ceramic piece by negative signal line, plastic processing frame is connected to the end of shell, it is characterized in that: the upper surface of described piezoelectric ceramic piece is divided into positive polar region, negative pole district and be arranged on positive polar region and negative pole district between spacer region, the lower surface of described piezoelectric ceramic piece is also provided with lower negative pole district, upper surface negative pole district be communicated with the lower negative pole district of lower surface, the area of described positive polar region is greater than the area in negative pole district.
2. one according to claim 1, based on piezoelectric ceramics high sensor, is characterized in that: between described plastic processing frame and shell, be also provided with rubber ring.
3. one according to claim 1, based on piezoelectric ceramics high sensor, is characterized in that: described cavity inside is also provided with noise reduction sponge, and described noise reduction sponge is pressed the surface that is attached to piezoelectric ceramic piece.
4. one according to claim 1, based on piezoelectric ceramics high sensor, is characterized in that: in described cavity, be filled with fluid sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850688.3U CN203642937U (en) | 2013-12-20 | 2013-12-20 | Piezoelectric ceramics-based high-sensitivity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850688.3U CN203642937U (en) | 2013-12-20 | 2013-12-20 | Piezoelectric ceramics-based high-sensitivity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203642937U true CN203642937U (en) | 2014-06-11 |
Family
ID=50874172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320850688.3U Expired - Lifetime CN203642937U (en) | 2013-12-20 | 2013-12-20 | Piezoelectric ceramics-based high-sensitivity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203642937U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743417A (en) * | 2013-12-20 | 2014-04-23 | 常州波速传感器有限公司 | High-sensitivity sensor based on piezoelectric ceramic |
| CN111063789A (en) * | 2019-12-10 | 2020-04-24 | 湖南博锐泰仪表有限公司 | High-sensitivity piezoelectric ceramic sensor structure |
| CN111220704A (en) * | 2019-12-10 | 2020-06-02 | 成都汇通西电电子有限公司 | Carpet identification device based on ultrasonic waves, preparation method and application |
| CN115079147A (en) * | 2022-07-21 | 2022-09-20 | 成都汇通西电电子有限公司 | Ultrasonic sensor |
-
2013
- 2013-12-20 CN CN201320850688.3U patent/CN203642937U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743417A (en) * | 2013-12-20 | 2014-04-23 | 常州波速传感器有限公司 | High-sensitivity sensor based on piezoelectric ceramic |
| CN111063789A (en) * | 2019-12-10 | 2020-04-24 | 湖南博锐泰仪表有限公司 | High-sensitivity piezoelectric ceramic sensor structure |
| CN111220704A (en) * | 2019-12-10 | 2020-06-02 | 成都汇通西电电子有限公司 | Carpet identification device based on ultrasonic waves, preparation method and application |
| CN111063789B (en) * | 2019-12-10 | 2023-04-28 | 湖南博锐泰仪表有限公司 | High-sensitivity piezoelectric ceramic sensor structure |
| CN115079147A (en) * | 2022-07-21 | 2022-09-20 | 成都汇通西电电子有限公司 | Ultrasonic sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |
|
| CX01 | Expiry of patent term |