CN219981445U - Multi-frequency ultrasonic sensor - Google Patents
Multi-frequency ultrasonic sensor Download PDFInfo
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- CN219981445U CN219981445U CN202321136095.0U CN202321136095U CN219981445U CN 219981445 U CN219981445 U CN 219981445U CN 202321136095 U CN202321136095 U CN 202321136095U CN 219981445 U CN219981445 U CN 219981445U
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- piezoelectric ceramic
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- ceramic plate
- frequency
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- 239000000919 ceramic Substances 0.000 claims abstract description 72
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000004332 silver Substances 0.000 claims abstract description 31
- 229910052709 silver Inorganic materials 0.000 claims abstract description 31
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 239000011358 absorbing material Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 1
- 230000026683 transduction Effects 0.000 abstract 1
- 238000010361 transduction Methods 0.000 abstract 1
- 239000000470 constituent Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
Abstract
The utility model discloses a multi-frequency ultrasonic sensor, which belongs to the technical field of ultrasonic transduction, and comprises a shell and a piezoelectric ceramic piece arranged in the shell; the positive electrode silver layer of the piezoelectric ceramic plate is provided with a separation groove, and the separation groove divides the positive electrode silver layer of the piezoelectric ceramic plate into at least two areas. Compared with the traditional ultrasonic sensor, the ultrasonic sensor provided by the utility model optimizes the structure of the piezoelectric ceramic plate, and particularly, the positive electrode silver layer of the piezoelectric ceramic plate is divided into at least two areas by arranging the separation groove on the positive electrode silver layer of the piezoelectric ceramic plate, so that more frequency points can be obtained, the applicability and the utilization rate of the ultrasonic sensor are improved, the working frequency of the ultrasonic sensor can be selected to be a certain fixed frequency according to actual use requirements, and the working frequency of the ultrasonic sensor can be selected to be a plurality of frequencies, so that the frequency is variable.
Description
Technical Field
The utility model belongs to the technical field of ultrasonic transducers, and particularly relates to a multi-frequency ultrasonic sensor.
Background
The ultrasonic sensor is a sensor for converting an ultrasonic signal into other energy signals (usually electric signals), and the ultrasonic wave is a mechanical wave with the vibration frequency higher than 20kHz, and has the characteristics of high frequency, short wavelength, good directivity, capability of becoming rays to directionally propagate, and the like; meanwhile, the ultrasonic wave has strong penetrability to liquid and solid, especially in the solid which is opaque to sunlight, and can penetrate to a depth of tens of meters; the ultrasonic waves can be reflected obviously to form echoes when encountering impurities or interfaces, and Doppler effect can be generated when the ultrasonic waves collide with a living body. Therefore, the ultrasonic sensor can be widely applied to the fields of industry, national defense, biomedicine and the like.
However, most of the existing ultrasonic sensors adopt piezoelectric ceramic plates with two sides and two poles, the formed product has only 1 frequency point, and the single-frequency ultrasonic sensor can only be suitable for ranging in specific environments.
Disclosure of Invention
In order to solve the technical problems of single frequency point, narrow application range and the like of the traditional ultrasonic sensor, the utility model provides the multi-frequency ultrasonic sensor.
The utility model is realized by the following technical scheme:
a multi-frequency ultrasonic sensor comprises a shell and a piezoelectric ceramic piece arranged inside the shell; the positive electrode silver layer of the piezoelectric ceramic plate is provided with a separation groove, and the separation groove divides the positive electrode silver layer of the piezoelectric ceramic plate into at least two areas.
Compared with the traditional ultrasonic sensor, the ultrasonic sensor provided by the utility model optimizes the structure of the piezoelectric ceramic plate, and particularly, the positive electrode silver layer of the piezoelectric ceramic plate is divided into at least two areas by arranging the separation groove on the positive electrode silver layer of the piezoelectric ceramic plate, so that more frequency points can be obtained, for example, if the positive electrode silver layer is divided into two areas, namely the area A and the area B, 2-3 frequency points can be obtained, and therefore, the applicability and the utilization rate of the ultrasonic sensor are improved.
As a preferred embodiment, the depth of the separation groove of the present utility model is at least one third of the thickness of the piezoelectric ceramic sheet.
As a preferred embodiment, the sensor of the present utility model may provide a fixed operating frequency or a variable operating frequency. The ultrasonic sensor provided by the utility model can obtain multiple frequency points, so that the working frequency of the ultrasonic sensor can be selected to be a certain fixed frequency according to actual use requirements, and the working frequency of the ultrasonic sensor can also be selected to be a plurality of frequencies, thereby realizing frequency variation.
As a preferred embodiment, different areas on the positive electrode silver layer of the piezoelectric ceramic sheet are conducted, and the single-frequency ultrasonic sensor can be obtained. The ultrasonic sensor provided by the utility model can conduct different areas on the positive electrode silver layer, so that the ultrasonic sensor with a single frequency point can be obtained, and the application range is wide.
As a preferred embodiment, the piezoelectric ceramic sheet of the present utility model adopts, but is not limited to, a circular shape or a square shape.
As a preferred embodiment, the piezoelectric ceramic sheet of the present utility model may be electrically connected to an external power source through an FPC circuit board.
As a preferred embodiment, the piezoelectric ceramic sheet is adhered to the inner bottom of the shell and cured, and the positive electrode silver layer of the piezoelectric ceramic sheet is positioned on the side far away from the bottom of the shell; the FPC circuit board provided with a plurality of pins is adhered to the step inside the shell, the FPC circuit board is positioned above the piezoelectric ceramic plate, and the positive electrode wire of the FPC circuit board is welded on the piezoelectric ceramic plate.
In a preferred embodiment, the piezoelectric ceramic sheet of the present utility model is further provided with a sound absorbing material. According to the ultrasonic sensor, the sound absorbing material is arranged on the piezoelectric ceramic plate, so that the influence of the external environment on the piezoelectric ceramic plate is reduced, and the performance of the ultrasonic sensor is improved.
As a preferred embodiment, the housing of the present utility model is made of aluminum material.
As a preferred embodiment, the housing of the present utility model comprises two symmetrical shell structures. The shell of the utility model can adopt a symmetrical split structure, thereby being convenient for processing and assembly.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. according to the ultrasonic sensor provided by the utility model, the separation groove is formed in the positive electrode silver layer of the piezoelectric ceramic plate, so that the positive electrode silver layer of the piezoelectric ceramic plate is divided into at least two areas, more frequency points can be obtained, and the applicability and the utilization rate of the ultrasonic sensor are improved;
2. the ultrasonic sensor provided by the utility model can obtain multiple frequency points, so that the working frequency of the ultrasonic sensor can be selected to be a certain fixed frequency according to actual use requirements, and the working frequency of the ultrasonic sensor can also be selected to be a plurality of frequencies, thereby realizing variable frequency;
3. the ultrasonic sensor provided by the utility model can conduct different areas on the positive electrode silver layer, so that the ultrasonic sensor with a single frequency point can be obtained, and the application range is wide.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
fig. 1 is a three-view of a multi-frequency ultrasonic sensor structure according to an embodiment of the present utility model. Wherein, (a) is a side view, (b) is a top view, and (c) is a front view.
Fig. 2 is a three-view of a piezoelectric ceramic structure according to an embodiment of the present utility model. Wherein, (a) is a side view, (b) is a top view, and (c) is a front view.
Fig. 3 is a schematic diagram of a multi-frequency ultrasonic sensor product according to an embodiment of the utility model.
Reference numerals and corresponding part names:
1-shell, 2-piezoceramic sheet, 21-positive electrode silver layer, 3-row pins, 4-separation grooves and 5-positive electrode wire.
Detailed Description
Hereinafter, the terms "comprises" or "comprising" as may be used in various embodiments of the present utility model indicate the presence of inventive functions, operations or elements, and are not limiting of the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the utility model, the terms "comprises," "comprising," and their cognate terms are intended to refer to a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be interpreted as first excluding the existence of or increasing likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the utility model, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B or may include both a and B.
Expressions (such as "first", "second", etc.) used in the various embodiments of the utility model may modify various constituent elements in the various embodiments, but the respective constituent elements may not be limited. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present utility model.
It should be noted that: if it is described to "connect" one component element to another component element, a first component element may be directly connected to a second component element, and a third component element may be "connected" between the first and second component elements. Conversely, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the utility model. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the utility model belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the utility model.
For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.
Examples:
aiming at the condition that the frequency of the existing ultrasonic sensor is single and is only suitable for ranging in a specific environment, the embodiment provides a multi-frequency ultrasonic sensor, the multi-frequency ultrasonic sensor provided by the embodiment can realize multi-frequency, meanwhile, the frequency of the ultrasonic sensor can be adjusted according to the actual use requirement, the same frequency can be realized, and frequency conversion can also be realized, so that the application range of the ultrasonic sensor is improved, and the utilization rate of the ultrasonic sensor is improved.
As shown in fig. 1-2, the multi-frequency ultrasonic sensor provided in this embodiment mainly comprises a housing 1 and a piezoelectric ceramic plate 2 mounted inside the housing 1.
The separation groove 4 is disposed on the positive electrode silver layer 21 of the piezoelectric ceramic sheet 2 in this embodiment, so that the positive electrode silver layer 21 of the piezoelectric ceramic sheet 2 is divided into at least 2 regions. As shown in fig. 2, the piezoelectric ceramic plate 2 of the present embodiment has a cube structure, and square separation grooves 4 are provided on the positive electrode silver layer 21 of the piezoelectric ceramic plate 2, so that the positive electrode silver layer 21 of the piezoelectric ceramic plate 2 is separated into 2 areas, and the formed multi-frequency ultrasonic sensor has 2-3 frequency points. The operating frequency of the ultrasonic sensor is the resonant frequency of the piezoelectric ceramic plate, and the resonant frequency of the piezoelectric ceramic plate is related to the size (such as thickness, diameter, etc.) of the piezoelectric ceramic plate, so that the piezoelectric ceramic plate 2 is divided into two areas, so that the piezoelectric ceramic plate 2 forms three structures with different areas, namely, an area a, an area B and an area a+an area B, and 3 frequency points can be realized.
The depth of the separation groove 4 on the positive electrode silver layer 21 of the piezoelectric ceramic plate 2 in this embodiment is at least one third of the thickness of the piezoelectric ceramic plate 2, so as to achieve better performance of the ultrasonic sensor.
The piezoelectric ceramic plate of the embodiment can carry out frequency adjustment according to actual use requirements, can realize fixed frequency and can also realize various frequency conversion. As shown in fig. 2, the piezoelectric ceramic plate 2 is divided into two areas, so that three working frequencies can be realized at most, and one of the three working frequencies can be selected as the working frequency of the ultrasonic sensor according to actual use requirements, namely, the frequency is fixed; two or three of the frequencies may also be selected as the operating frequencies of the ultrasonic sensor, i.e. frequency conversion.
It should be noted that fig. 1-2 are only exemplary, and the shape, the number of the dividing grooves, the dividing regions, etc. of the piezoelectric ceramic sheet 2 are not limited, that is, in another alternative embodiment, according to practical use requirements, other shapes of piezoelectric ceramic sheets may be adopted, for example, a circular piezoelectric ceramic sheet, etc. and 2 or more dividing grooves may be provided, so that the positive electrode silver layer 21 of the piezoelectric ceramic sheet 2 is divided into more regions to obtain more multi-frequency requirements, for example, the positive electrode silver layer of the piezoelectric ceramic sheet may be divided into three or more regions.
The piezoelectric ceramic sheet 2 of the present embodiment may be electrically connected to the pins 3 through an FPC circuit board (not shown in the drawings), so that excitation voltages are supplied to different regions of the piezoelectric ceramic sheet 2 through the pins 3. The pin header 3 of this embodiment includes at least three pins, as shown in fig. 1-2, dividing the piezoelectric ceramic plate 2 into two areas, and then electrically connecting an external power source with the piezoelectric ceramic plate 2 through the three pins (two anodes and one cathode), wherein the two anodes are respectively connected with the area a and the area B of the positive silver layer of the piezoelectric ceramic plate 2 through the positive wire 5 on the FPC circuit board, and one cathode is integrated with the negative electrode of the FPC circuit board and the negative electrode of the piezoelectric ceramic plate 2.
The piezoelectric ceramic piece 2 of the present embodiment is adhered to the inner bottom of the case 1 and cured, and the positive electrode silver layer 21 of the piezoelectric ceramic piece 2 is located on the side away from the bottom of the case 1 (i.e., facing upward). Install three contact pin on the FPC circuit board, later will have the FPC circuit board of contact pin and bond on the inside step of shell 1, and the FPC circuit board is located piezoceramics piece 2 top, welds the anodal line of FPC circuit board to piezoceramics piece 2 relevant position and set up sound absorbing material on piezoceramics piece 2 at last, prevent the influence of external environment to piezoceramics piece, improve ultrasonic sensor's performance.
In other alternative embodiments, the piezoceramic sheet 2 may be electrically connected to an external driving power source through other structures, circuits, or modes.
The housing 1 of the ultrasonic sensor proposed in the present embodiment is made of, but not limited to, aluminum material. The shell 1 can also adopt a split structure, as shown in fig. 1, and the shell 1 is formed by adopting two symmetrical shell structures in a matched manner, so that the processing and the assembly are convenient.
At least 2 areas on the positive electrode silver layer 21 of the piezoelectric ceramic sheet 2 are conducted, and the single-frequency ultrasonic sensor can be obtained.
The multi-frequency ultrasonic sensor provided by the embodiment can realize multi-frequency points by partitioning the positive electrode silver layer of the piezoelectric ceramic plate, and can select the working frequency of the ultrasonic sensor to be a certain fixed frequency or a plurality of frequencies according to the actual use requirement, so that the frequency adjustment is realized, the fixed frequency is realized, and the various frequency conversion is also realized.
The assembly mode of the ultrasonic sensor provided in this embodiment specifically includes:
bonding the piezoelectric ceramic plate 2 to the inner bottom of the shell 1 by adopting automatic equipment and curing;
inserting 3 pins into holes on the FPC circuit board by adopting automatic equipment and tinning;
dispensing glue on the step of the shell 1 by adopting automatic equipment, and placing the prepared negative electrode surface of the FPC board at the dispensing position for bonding;
finally, the positive electrode wire on the FPC circuit board is welded to the corresponding position on the piezoelectric ceramic plate by adopting automatic equipment and is filled with sound absorbing materials, so that the ultrasonic sensor product shown in figure 3 is formed.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (8)
1. A multi-frequency ultrasonic sensor comprising a housing (1) and a piezoelectric ceramic plate (2) mounted inside said housing; the piezoelectric ceramic plate is characterized in that a separation groove (4) is formed in the positive electrode silver layer (21) of the piezoelectric ceramic plate (2), and the separation groove (4) divides the positive electrode silver layer (21) of the piezoelectric ceramic plate (2) into at least two areas;
the piezoelectric ceramic piece (2) is electrically connected with an external power supply through an FPC circuit board;
the piezoelectric ceramic piece (2) is adhered to the inner bottom of the shell (1) and cured, and the positive electrode silver layer (21) of the piezoelectric ceramic piece (2) is positioned at one side far away from the bottom of the shell (1); the FPC circuit board provided with a plurality of pins is adhered to the inner step of the shell (1), the FPC circuit board is positioned above the piezoelectric ceramic plate (2), and the positive electrode wire of the FPC circuit board is welded on the piezoelectric ceramic plate (2).
2. A multi-frequency ultrasonic sensor according to claim 1, characterized in that the depth of the separation groove (4) is at least one third of the thickness of the piezoelectric ceramic plate (2).
3. A multi-frequency ultrasonic sensor according to claim 1 or 2 wherein the sensor provides a fixed or variable operating frequency.
4. The multi-frequency ultrasonic sensor according to claim 1 or 2, wherein different areas on the positive electrode silver layer (21) of the piezoelectric ceramic plate (2) are conducted, so that the single-frequency ultrasonic sensor can be obtained.
5. A multi-frequency ultrasonic sensor according to claim 1 or 2, characterized in that the piezo-ceramic plate (2) is circular or square.
6. The multi-frequency ultrasonic sensor according to claim 1, wherein the piezoelectric ceramic plate (2) is further provided with a sound absorbing material.
7. A multi-frequency ultrasonic sensor according to claim 1 or 2, characterized in that the housing (1) is made of aluminium material.
8. A multi-frequency ultrasonic sensor according to claim 1 or 2, characterized in that the housing (1) comprises two symmetrical shell structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321136095.0U CN219981445U (en) | 2023-05-11 | 2023-05-11 | Multi-frequency ultrasonic sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321136095.0U CN219981445U (en) | 2023-05-11 | 2023-05-11 | Multi-frequency ultrasonic sensor |
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| CN219981445U true CN219981445U (en) | 2023-11-07 |
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| CN202321136095.0U Active CN219981445U (en) | 2023-05-11 | 2023-05-11 | Multi-frequency ultrasonic sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117664203A (en) * | 2024-01-31 | 2024-03-08 | 成都楷模电子科技有限公司 | Novel high-frequency ultrasonic sensor |
| CN117664203B (en) * | 2024-01-31 | 2024-04-26 | 成都楷模电子科技有限公司 | High-frequency ultrasonic sensor |
-
2023
- 2023-05-11 CN CN202321136095.0U patent/CN219981445U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117664203A (en) * | 2024-01-31 | 2024-03-08 | 成都楷模电子科技有限公司 | Novel high-frequency ultrasonic sensor |
| CN117664203B (en) * | 2024-01-31 | 2024-04-26 | 成都楷模电子科技有限公司 | High-frequency ultrasonic sensor |
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