CN203191547U - Multidirectional high-frequency ultrasonic sensor - Google Patents
Multidirectional high-frequency ultrasonic sensor Download PDFInfo
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- CN203191547U CN203191547U CN 201320156197 CN201320156197U CN203191547U CN 203191547 U CN203191547 U CN 203191547U CN 201320156197 CN201320156197 CN 201320156197 CN 201320156197 U CN201320156197 U CN 201320156197U CN 203191547 U CN203191547 U CN 203191547U
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- piezoelectric ceramic
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Abstract
The utility model relates to a sensor, especially to a high-frequency ultrasonic sensor which comprises a plurality of piezoelectric ceramic sheets and matching layers, of which the number equals to that of the piezoelectric ceramic sheets, wherein the conducting layer on the upper surface of each piezoelectric ceramic sheet is bonded to one corresponding matching layer which is bonded to a metal casing. A PCB plate, where cathode and anode terminals are fixed, are bonded in the metal casing, wherein the conducting layer on the upper surface of each piezoelectric ceramic sheet is connected with the anode terminal, and the conducting layer on the lower surface of each piezoelectric ceramic sheet is connected with the cathode terminal. In such a structure, the multidirectional high-frequency ultrasonic sensor detects in multiple directions without a plurality of high-frequency ultrasonic sensors, which saves space for a machine and lowers cost.
Description
Technical field
The utility model relates to a kind of sensor, particularly a kind of high-frequency ultrasonic sensor.
Background technology
Ultrasonic sensor is the sensor that utilizes hyperacoustic characteristic to develop.Ultrasound wave is the mechanical wave that a kind of vibration frequency is higher than sound wave, is taken place under the excitation of voltage by the transducing wafer that vibration produces, and it has the frequency height, wavelength is short, the diffraction phenomenon is little, particularly good directionality, can become ray and characteristics such as direction propagation.
Just because of the ultrasonic sensor good directionality, can direction propagation characteristics, so general ultrasonic sensor all is unidirectional ultrasonic sensor.As shown in Figure 1, existing folk prescription comprises matching layer 1 to high-frequency ultrasonic sensor, and it is bonding with metal shell 5 then to be bonded with piezoelectric ceramic piece 4 on the described matching layer 1.Pcb board 3 is bonding with metal shell 5, and positive signal line 2 connects the positive terminal 8 of piezoelectric ceramic piece 4 and pcb board 3, and negative signal line 6 connects the negative terminals 7 of metal shell 5 and pcb board 3.Piezoelectric ceramic piece 4 is electrically connected with metal shell 5 with the bonding plane of matching layer 1, and the both sides of piezoelectric ceramic piece 4 are connected with positive terminal 8, negative terminals 7 respectively like this.Send and received ultrasonic signal by piezoelectric ceramic piece, thus the position of detection object.
High-frequency ultrasonic sensor generally is applied in fields such as industrial automation, intelligent robot.High-frequency ultrasonic sensor can only be to folk prescription to transmitting and receiving ultrasound wave, can only survey folk prescription to.Survey a plurality of directions if desired and just a plurality of high-frequency ultrasonic sensors need be set, increased cost so undoubtedly.In addition, ultrasonic sensor is integrated is a developing direction of ultrasonic sensor.
Summary of the invention
The utility model technical issues that need to address provide a kind of high-frequency ultrasonic sensor of multidirectional.
For solving above-mentioned technical matters, multidirectional high-frequency ultrasonic sensor of the present utility model comprises a plurality of piezoelectric ceramic pieces and the matching layer that equates with piezoelectric ceramic piece quantity, the top surface conductive layers of each piezoelectric ceramic piece is bonded on the corresponding matching layer, and described matching layer is bonded on the metal shell; Be bonded with pcb board in the described metal shell, the positive and negative electrode terminals are fixedly arranged on the described pcb board; The top surface conductive layers of described each piezoelectric ceramic piece is connected with negative terminals; The lower surface conductive layer of each piezoelectric ceramic piece is connected with positive terminal.
Described piezoelectric ceramic piece is two, and described metal shell is that two cylindrical cases are formed by connecting, and described cylindrical case inside communicates, and described two cylindrical cases are one-body molded.
Described two matching layers are bonded in respectively on two cylindrical case end faces, form angle between described two cylindrical case end faces.
Described matching layer is surperficial vertical with the detection direction of corresponding piezoelectric ceramic piece with being connected of corresponding piezoelectric ceramic piece.
Described negative terminals is connected with metal shell, and the top surface conductive layers of described each piezoelectric ceramic piece is connected with metal shell.
After adopting said structure, multidirectional high frequency ultrasound sensor of the present utility model is separately positioned on a plurality of piezoelectric ceramic pieces on the different matching layers, the upper and lower conductive layers of piezoelectric ceramic piece is the public both positive and negative polarity terminals that are connected respectively, do not need to use a plurality of high-frequency ultrasonic sensors just can survey a plurality of directions like this, can not only save the space for machinery and equipment like this, can save cost again.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 be in the utility model background technology folk prescription to the inner structure synoptic diagram of high-frequency ultrasonic sensor.
Fig. 2 is sectional structure synoptic diagram of the present utility model.
Fig. 3 is the structural representation of the utility model piezoelectric ceramic piece.
Fig. 4 is the plan structure synoptic diagram of the utility model metal shell.
Among the figure: 1 is matching layer, and 2 is the positive signal line, and 3 is pcb board, and 4 is piezoelectric ceramic piece, and 5 is metal shell, and 6 is the negative signal line, and 7 is negative terminals, and 8 is positive terminal
101 is first matching layer, and 102 is second matching layer, and 301 is the lower surface conductive layer, and 302 is top surface conductive layers, and 303 is potsherd, and 401 is first piezoelectric ceramic piece, and 402 is second piezoelectric ceramic piece
Embodiment
As shown in Figure 2, multidirectional high frequency ultrasound sensor of the present utility model comprises two piezoelectric ceramic pieces and the matching layer that equates with piezoelectric ceramic piece quantity, i.e. first piezoelectric ceramic piece 401 and second piezoelectric ceramic piece 402, first matching layer 101 and second matching layer 102.
As shown in Figure 3, piezoelectric ceramic piece described in the utility model comprises middle potsherd 303 and the conductive layer that covers middle potsherd two surfaces about in the of 303, and top surface conductive layers 302 and lower surface conductive layer 301, top surface conductive layers 302 and lower surface conductive layer 301 are silver-plated conductive layer here.
As shown in Figure 4, metal shell of the present utility model is formed by connecting by two cylindrical cases, and in order to make the integral body of metal shell 5 more firm, described two cylindrical cases are one-body molded.Described two cylindrical case inside are identical, as shown in Figure 2, are bonded with pcb board 3 in the inner identical zone of two cylindrical cases.
As shown in Figure 2, the top surface conductive layers of described first piezoelectric ceramic piece 401 is mutually bonding with first matching layer 101, the top surface conductive layers of described second piezoelectric ceramic piece 402 is mutually bonding with second matching layer 102, described first matching layer 101 and second matching layer 102 be bonded in respectively metal shell 5 about on the end face of two cylindrical cases, disconnect between described first matching layer 101 and second matching layer 102.Positive terminal 8 and negative terminals 7 are fixedly arranged on the described pcb board 3, and the top surface conductive layers of described first piezoelectric ceramic piece 401 and second piezoelectric ceramic piece 402 all is connected with negative terminals 7; The top surface conductive layers of first piezoelectric ceramic piece 401 and second piezoelectric ceramic piece 402 is connected with positive terminal 8 by positive signal line 2.Can between positive terminal 8 and negative terminals 7, feed signal like this first piezoelectric ceramic piece 401 and second piezoelectric ceramic piece 402 are worked simultaneously, can send and receive ultrasound wave to both direction and survey.Further, for the positive and negative electrode link that reduces metal shell 5 lead that is connected with piezoelectric ceramic piece upper and lower surface conductive layer, negative terminals 7 is connected with metal shell 5 by negative signal line 6, the piezoelectric ceramic piece upper surface is electrically connected with metal shell 5 with lead between the matching layer by being arranged on the piezoelectric ceramic piece top surface conductive layers then, the piezoelectric ceramic piece upper surface has reduced the use that connects lead just by metal shell 5 indirect being connected with negative terminals 7 like this.Two electric loops have so just been formed, positive terminal 8-positive signal line 2-piezoelectric ceramic piece 401-metal shell 5-negative signal line 6-negative terminals 7; Positive terminal 8-positive signal line 2-piezoelectric ceramic piece 402-metal shell 5-negative signal line 6-negative terminals 7.Take place for respectively two piezoelectric ceramic pieces and the reception signal by two electric loops, produce and receive ultrasound wave both direction is surveyed.
Further, though it is hyperacoustic to sending that each piezoelectric ceramic piece of ultrasonic sensor is folk prescription, but the ultrasound wave surface of emission of each piezoelectric ceramic piece is fan-shaped, in order to make adjacent piezoelectric ceramic piece ultrasound wave emitting area not produce common factor, form angle between the end face of described two cylindrical cases, because two matching layers are connected on the end face of two cylindrical cases, so form angle between described first matching layer 101 and second matching layer 102.Such angle structure with locate the structure of two matching layers at grade and compare the emitting area that can effectively avoid two piezoelectric ceramic pieces and intersect.
Further, in order to make the direction of the hyperacoustic transmit direction of each piezoelectric ceramic piece and required detection be consistent as far as possible, with described two matching layers and piezoelectric ceramic piece to be connected the surface vertical with the detection direction of each piezoelectric ceramic piece, namely first matching layer 101 and first piezoelectric ceramic piece 401 be connected surperficial vertical with the detection direction of first piezoelectric ceramic piece; Being connected of second matching layer 102 and second piezoelectric ceramic piece 402 is surperficial vertical with the detection direction of second piezoelectric ceramic piece, so just can guarantee that the detection direction of each piezoelectric ceramic piece and desired detection direction are consistent.
Certainly, the quantity of the utility model piezoelectric ceramic piece and matching layer can be more than three or three, guarantee that each piezoelectric ceramic piece is corresponding with matching layer, the top surface conductive layers of each piezoelectric ceramic piece is connected with negative terminals, and the lower surface conductive layer of each piezoelectric ceramic piece is connected with positive terminal and gets final product.Though more than described embodiment of the present utility model, but those of skill in the art in the art are to be understood that, these only illustrate, and can make numerous variations or modification to these embodiments, and not deviate from principle of the present utility model and essence.Scope of the present utility model is only limited by appended claims.
Claims (5)
1. multidirectional high frequency ultrasound sensor, it is characterized in that: comprise a plurality of piezoelectric ceramic pieces and the matching layer that equates with piezoelectric ceramic piece quantity, the top surface conductive layers of each piezoelectric ceramic piece is bonded on the corresponding matching layer, and described matching layer is bonded on the metal shell; Be bonded with pcb board in the described metal shell, the positive and negative electrode terminals are fixedly arranged on the described pcb board; The top surface conductive layers of described each piezoelectric ceramic piece is connected with negative terminals; The lower surface conductive layer of each piezoelectric ceramic piece is connected with positive terminal.
2. according to the described multidirectional high frequency ultrasound of claim 1 sensor, it is characterized in that: described piezoelectric ceramic piece is two, and described metal shell is that two cylindrical cases are formed by connecting, and described cylindrical case inside communicates, and described two cylindrical cases are one-body molded.
3. according to the described multidirectional high frequency ultrasound of claim 2 sensor, it is characterized in that: described two matching layers are bonded in respectively on two cylindrical case end faces, form angle between described two cylindrical case end faces.
4. according to the described multidirectional high frequency ultrasound of claim 3 sensor, it is characterized in that: described matching layer is surperficial vertical with the detection direction of corresponding piezoelectric ceramic piece with being connected of corresponding piezoelectric ceramic piece.
5. according to each described multidirectional high frequency ultrasound sensor in the claim 1 to 4, it is characterized in that: described negative terminals is connected with metal shell, and the top surface conductive layers of described each piezoelectric ceramic piece is connected with metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320156197 CN203191547U (en) | 2013-03-29 | 2013-03-29 | Multidirectional high-frequency ultrasonic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320156197 CN203191547U (en) | 2013-03-29 | 2013-03-29 | Multidirectional high-frequency ultrasonic sensor |
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| Publication Number | Publication Date |
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| CN203191547U true CN203191547U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320156197 Expired - Lifetime CN203191547U (en) | 2013-03-29 | 2013-03-29 | Multidirectional high-frequency ultrasonic sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197309A (en) * | 2013-03-29 | 2013-07-10 | 常州波速传感器有限公司 | Multiple-directivity high-frequency ultrasonic sensor |
-
2013
- 2013-03-29 CN CN 201320156197 patent/CN203191547U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197309A (en) * | 2013-03-29 | 2013-07-10 | 常州波速传感器有限公司 | Multiple-directivity high-frequency ultrasonic sensor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130911 |
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| CX01 | Expiry of patent term |