CN215932137U - Ultrasonic sensor - Google Patents
Ultrasonic sensor Download PDFInfo
- Publication number
- CN215932137U CN215932137U CN202122430589.7U CN202122430589U CN215932137U CN 215932137 U CN215932137 U CN 215932137U CN 202122430589 U CN202122430589 U CN 202122430589U CN 215932137 U CN215932137 U CN 215932137U
- Authority
- CN
- China
- Prior art keywords
- matching layer
- piezoelectric ceramic
- adapter plate
- ceramic piece
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000013016 damping Methods 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000008054 signal transmission Effects 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- 239000003345 natural gas Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Measuring Volume Flow (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The utility model discloses an ultrasonic sensor which comprises a matching layer component, a piezoelectric ceramic piece, a PCB adapter plate and a sealing layer, wherein the matching layer component is arranged on the PCB adapter plate; the piezoelectric ceramic piece is electrically connected with the PCB adapter plate through an internal connecting wire, and the PCB adapter plate is also electrically connected with an external connecting wire; the piezoelectric ceramic piece is arranged in the matching layer component, and the cathode and the internal connecting lead of the piezoelectric ceramic piece are arranged in the flat bottom groove; the head of the matching layer assembly is in a round table structure, a stepped groove is formed inside the matching layer assembly, and a flat bottom groove is formed at the bottom of the stepped groove; according to the utility model, through the unique structural design of the matching layer assembly, the ultrasonic signal transmission and reception are both considered, the relatively serious received signal attenuation is avoided, and the ultrasonic flow measurement device is suitable for flow measurement; through the combination setting of matching layer subassembly, piezoceramics piece, damping layer, PCB keysets, sound absorbing layer, sealing layer for the structure of this application is more firm, makes signal detection accurate.
Description
Technical Field
The utility model relates to the technical field of sensors, in particular to an ultrasonic sensor.
Background
The ultrasonic sensor consists of three main components, acoustic matching, backing and piezoelectric material. Wherein the acoustic matching layer functions as: it is often the case that propagation of ultrasonic waves is difficult due to acoustic impedance mismatch because the ultrasonic waves propagate in two media. The significant difference in acoustic impedance between the two media not only reduces the interfacial coefficient of projection, but also causes the piezoelectric element to resonate at a high Q value, with a narrow frequency band and a long pulse length, thereby seriously affecting the transmitting and receiving sensitivity and axial resolution of the probe and the richness of information. Acoustic matching achieves acoustic impedance transitions or matches.
The backing is placed on the back of the piezoelectric material and is connected with the piezoelectric material into a whole body, and the backing is used for controlling the frequency and impulse response of the ultrasonic transducer. Ultrasonic sensor to natural gas divides according to the frequency channel, belongs to high frequency sensor. Since the density and composition of the ultrasonic sensor are completely different from those of air and the natural gas in many regions contains corrosive gas components, the ultrasonic sensor for the natural gas needs to be designed separately. In the prior art, the matching layer of the ultrasonic sensor is bonded with the piezoelectric material and the backing material in a surface mount manner, so that the ultrasonic sensor is more suitable for transmitting ultrasonic waves, the received signals of the ultrasonic waves are seriously attenuated, and the ultrasonic sensor has great influence particularly on the scene that the ultrasonic sensor is applied to flow measurement and needs to distinguish and process the received echo signals.
Therefore, it is necessary to develop an ultrasonic sensor to solve the above problems.
Disclosure of Invention
The present invention is directed to an ultrasonic sensor designed to solve the above problems.
The utility model realizes the purpose through the following technical scheme:
an ultrasonic sensor comprising:
a matching layer component; the head of the matching layer assembly is in a round table structure, a stepped groove is formed inside the matching layer assembly, and a flat bottom groove is formed at the bottom of the stepped groove;
piezoelectric ceramic plates; the piezoelectric ceramic piece is arranged in the matching layer component, and the cathode and the internal connecting lead of the piezoelectric ceramic piece are arranged in the flat bottom groove;
a PCB adapter plate; the piezoelectric ceramic piece is electrically connected with the PCB adapter plate through an internal connecting wire, and the PCB adapter plate is also electrically connected with an external connecting wire;
a sealing layer; the sealing layer, the PCB adapter plate, the piezoelectric ceramic piece and the matching layer component are sequentially connected and arranged.
Specifically, the ultrasonic sensor further comprises a damping layer, and the damping layer is arranged between the piezoelectric ceramic piece and the PCB adapter plate.
Specifically, the ultrasonic sensor further comprises a sound absorption layer, and the sound absorption layer is arranged between the PCB adapter plate and the sealing layer.
Specifically, the ultrasonic sensor further comprises a rubber sleeve, and the rubber sleeve is connected with one end, far away from the sound absorption layer, of the sealing layer.
Preferably, the matching layer assembly is connected with the piezoelectric ceramic plate through an adhesive.
The utility model has the beneficial effects that:
through the unique structural design of the matching layer assembly, the ultrasonic wave flow measurement device has the advantages that the ultrasonic wave signal transmission and reception are both considered, the relatively serious received signal attenuation is avoided, and the ultrasonic wave flow measurement device is suitable for flow measurement;
through the combination setting of matching layer subassembly, piezoceramics piece, damping layer, PCB keysets, sound absorbing layer, sealing layer for the structure of this application is more firm, makes signal detection accurate.
Drawings
FIG. 1 is an exploded view of the present application;
FIG. 2 is a perspective view of a matching layer assembly of the present application;
FIG. 3 is a cross-sectional view of a matching layer assembly of the present application;
wherein corresponding reference numerals are: 1-matching layer assembly; 11-flat bottom groove; 12-a step groove; 2. an adhesive; 3. piezoelectric ceramic plates; 4. a damping layer; 5. an internal connection lead; 6. a PCB adapter plate; 7. a sound absorbing layer; 8. a sealing layer; 9. a rubber sleeve; 10. and connecting with external leads.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of embodiments of the utility model refers to the accompanying drawings.
As shown in fig. 1 to 3, an ultrasonic sensor includes:
a matching layer assembly 1; the head of matching layer subassembly 1 is the round platform structure, and the design purpose has two like this: the contact area between the matching layer and the natural gas is increased, so that the incident angle and the transmitting angle of ultrasonic signals are increased, and the receiving and transmitting of ultrasonic sound beams are facilitated; and the natural gas airflow meets the circular truncated cone-shaped structure, can rotate along the outer edge of the circular truncated cone, has a flow guiding effect on the natural gas airflow, effectively increases the flow rate of the natural gas, can also separate solid impurities and gas contained in the natural gas, and effectively improves the sensitivity of the sensor. A stepped groove 12 is formed in the matching layer assembly 1, and a flat bottom groove 11 is formed at the bottom of the stepped groove 12; a wire passing groove is formed in the side wall of the stepped groove 12 and connected with the flat bottom groove 11 and used for placing the unilateral internal connecting wire 5;
a piezoelectric ceramic piece 3; the piezoelectric ceramic piece 3 is arranged in the matching layer component 1, the matching layer component 1 is connected with the piezoelectric ceramic piece 3 through the adhesive 2, and the cathode of the piezoelectric ceramic piece 3 and the internal connecting lead 5 are arranged in the flat bottom groove 11;
a PCB pinboard 6; the piezoelectric ceramic piece 3 is electrically connected with the PCB adapter plate 6 through an internal connecting lead 5, and the PCB adapter plate 6 is also electrically connected with an external connecting lead 10;
a sealing layer 8;
a damping layer 4; the damping layer 4 isolates the piezoelectric ceramic piece 3 and the PCB adapter plate 6.
A sound absorbing layer 7; the sound absorption layer 7 is arranged between the PCB adapter plate 6 and the sealing layer 8.
A rubber sleeve 9; the rubber sleeve 9 is connected with one end of the sealing layer 8 far away from the sound absorption layer 7. The rubber sleeve 9, the sealing layer 8, the sound absorbing layer 7, the PCB adapter plate 6, the damping layer 4, the piezoelectric ceramic piece 3 and the matching layer component 1 are sequentially connected. The external lead 10 is arranged by penetrating the sound absorption layer 7, the sealing layer 8 and the rubber sleeve 9 and is connected with the outside after penetrating.
The ultrasonic wave emission sound beam is transmitted to a natural gas medium through the piezoelectric ceramic piece 3, the adhesive 2 and the matching layer component 1 in sequence. On the contrary, the ultrasonic receiving echo is realized by the matching layer component 1, the adhesive 2 and the piezoelectric ceramic piece 3 in sequence.
The exciting and receiving transmission paths of the piezoelectric ceramic plate 3 are realized by the internal connecting lead 5. The internal lead 5 is further connected to the outside through the PCB adapter plate 6 and the external lead 10 soldered thereon to realize the transmission of the excitation and reception signals.
Description of the working principle:
the piezoelectric ceramic piece 3 in the ultrasonic sensor generates mechanical deformation along with the amplitude and frequency of the voltage loaded on the two poles of the piezoelectric ceramic piece, and simultaneously transmits ultrasonic waves to an external medium; if ultrasonic vibration is loaded on the piezoelectric ceramic piece 3 in reverse, an electric signal is generated, and the intensity of the loaded ultrasonic vibration can be obtained by detecting the intensity change of the electric signal, which is the working principle of the ultrasonic sensor.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (5)
1. An ultrasonic sensor, comprising:
a matching layer component; the head of the matching layer assembly is in a round table structure, a stepped groove is formed inside the matching layer assembly, and a flat bottom groove is formed at the bottom of the stepped groove;
piezoelectric ceramic plates; the piezoelectric ceramic piece is arranged in the matching layer component, and the cathode and the internal connecting lead of the piezoelectric ceramic piece are arranged in the flat bottom groove;
a PCB adapter plate; the piezoelectric ceramic piece is electrically connected with the PCB adapter plate through an internal connecting wire, and the PCB adapter plate is also electrically connected with an external connecting wire;
a sealing layer; the sealing layer, the PCB adapter plate, the piezoelectric ceramic piece and the matching layer component are sequentially connected and arranged.
2. The ultrasonic sensor of claim 1, further comprising a damping layer disposed between the piezoceramic wafer and the PCB interposer.
3. The ultrasonic sensor of claim 1, further comprising a sound absorbing layer disposed between the PCB interposer and the sealing layer.
4. The ultrasonic sensor of claim 1, further comprising a rubber sleeve, wherein the rubber sleeve is connected to an end of the sealing layer away from the sound absorbing layer.
5. The ultrasonic transducer of claim 1, wherein the matching layer assembly and the piezoceramic wafer are connected by an adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122430589.7U CN215932137U (en) | 2021-10-09 | 2021-10-09 | Ultrasonic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122430589.7U CN215932137U (en) | 2021-10-09 | 2021-10-09 | Ultrasonic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215932137U true CN215932137U (en) | 2022-03-01 |
Family
ID=80406949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122430589.7U Active CN215932137U (en) | 2021-10-09 | 2021-10-09 | Ultrasonic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215932137U (en) |
-
2021
- 2021-10-09 CN CN202122430589.7U patent/CN215932137U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4264788A (en) | Damped ultrasonic detection unit | |
| US5389848A (en) | Hybrid ultrasonic transducer | |
| JP2918102B2 (en) | Ultrasonic transducer | |
| US3794866A (en) | Ultrasonic search unit construction | |
| CN103562687B (en) | Ultrasonic transmitter-receiver and ultrasonic flow meter | |
| KR100852555B1 (en) | Ultrasonic flowmeter and ultrasonic generator/detector | |
| CN107249763B (en) | Acoustic transducer comprising a plurality of single transducers and method for making the same | |
| US11426764B2 (en) | Ultrasound transducer | |
| CN114111928B (en) | High-frequency ultrasonic sensor suitable for gas flow detection | |
| CN114111927B (en) | High-frequency ultrasonic sensor suitable for gas flow detection | |
| CN103111410A (en) | Novel ultrasonic wave sensor | |
| CN102288782A (en) | High-precision ultrasonic transducer | |
| JP2019535164A (en) | Hydrophone, energy conversion method and composite hydrophone | |
| RU169297U1 (en) | ELECTRO-ACOUSTIC OPTICAL TRANSMITTER TO ULTRASONIC FLOW METERS | |
| US7388317B2 (en) | Ultrasonic transmitting/receiving device and method for fabricating the same | |
| CN215932137U (en) | Ultrasonic sensor | |
| JP2008151599A (en) | Ultrasonic probe | |
| CN202196077U (en) | High precision ultrasonic sensor | |
| EP2735380A1 (en) | A transducer for a locator beacon and an underwater locator beacon | |
| US20220333970A1 (en) | Ultrasonic Transducer and Method of Operating an Ultrasonic Transducer | |
| JP4303100B2 (en) | Ultrasonic sensor | |
| CN203061411U (en) | Novel ultrasonic sensor | |
| JP2011007764A (en) | Ultrasonic level meter | |
| US20250256302A1 (en) | Ultrasonic transducer for high-temperature application | |
| JP3667426B2 (en) | Sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |