CN214333833U - Ultrasonic sensor containing sound-absorbing cotton - Google Patents
Ultrasonic sensor containing sound-absorbing cotton Download PDFInfo
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- CN214333833U CN214333833U CN202120723127.1U CN202120723127U CN214333833U CN 214333833 U CN214333833 U CN 214333833U CN 202120723127 U CN202120723127 U CN 202120723127U CN 214333833 U CN214333833 U CN 214333833U
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- piezoelectric ceramic
- sound
- ceramic piece
- absorbing cotton
- ultrasonic sensor
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Abstract
The utility model discloses an ultrasonic sensor containing sound-absorbing cotton, which comprises a piezoelectric ceramic piece and a shell, wherein the shell comprises a cavity, and the piezoelectric ceramic piece is arranged in the cavity; the piezoelectric ceramic piece is provided with sound absorption cotton. The sound-absorbing cotton is covered on the piezoelectric ceramic piece, so that the contact area of the piezoelectric ceramic piece and the foaming adhesive is reduced, and the aim of improving the sensitivity of a product is fulfilled; the sound-absorbing cotton covered on the piezoelectric ceramic piece ensures that the foaming glue is not in direct contact with the piezoelectric ceramic piece, thereby solving the problem that the amplitude and the sensitivity of the product are greatly reduced after the piezoelectric ceramic piece is bonded by the foaming glue. The piezoelectric ceramic piece is positioned at the bottom of the cavity, and sound absorption cotton is arranged on the front side of the piezoelectric ceramic piece; the piezoelectric ceramic piece and the sound-absorbing cotton are packaged in the cavity through the foaming adhesive, so that the contact area of the piezoelectric ceramic piece and the foaming adhesive is reduced, and the purpose of improving the product sensitivity is achieved.
Description
Technical Field
The utility model relates to an ultrasonic sensor, concretely relates to contain and inhale cotton ultrasonic sensor of sound.
Background
The ultrasonic sensor using the foaming glue process at present is generally characterized in that after piezoelectric ceramic pieces are bonded, a layer of foaming glue is directly sprayed on the bottom of an aluminum shell and the piezoelectric ceramic pieces, and the foaming glue is fully foamed and then is tightly bonded with the piezoelectric ceramic pieces, so that the vibration of the piezoelectric ceramic pieces is restrained to a certain extent, and the defects of low amplitude and low sensitivity of products are caused; in order to ensure that the foaming adhesive is tightly bonded with the aluminum shell so as to reduce the risk of product oversize and bifurcation, the whole cover has larger residual vibration due to the existence of gaps or unevenness between the sound-absorbing cotton and the cavity, and a layer of adhesive (the adhesive cannot be prevented from being sprayed on the piezoelectric ceramic sheet) is sprayed on the bottom of the aluminum shell before foaming the foaming adhesive, so that the piezoelectric ceramic sheet is more tightly bonded with the foaming adhesive, and the sensitivity of the product is further inhibited.
The utility model discloses a cover one on piezoceramics piece and inhale the sound cotton, reduce piezoceramics piece and foamed plastic's area of contact to reach the purpose that promotes product sensitivity.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that current inhale the sound cotton and encapsulate after piezoceramics piece integrally covers, wherein clearance or unevenness aftershock are great to influence ultrasonic sensor's sensitivity performance, aim at provides one kind and contains and inhale cotton ultrasonic sensor of sound, cover the sound cotton of inhaling of a less than or equal to piezoceramics surface area on piezoceramics piece, both guaranteed better whole fillability and improved sensitivity.
The utility model discloses a following technical scheme realizes:
an ultrasonic sensor containing sound absorption cotton comprises a piezoelectric ceramic piece and a shell, wherein the shell comprises a cavity, and the piezoelectric ceramic piece is arranged at the bottom of the cavity; further comprising: the sound absorption cotton, the first lead and the second lead; the first lead is connected with the piezoelectric ceramic piece, and the second lead is connected with the shell; the piezoelectric ceramic piece is provided with sound absorption cotton;
and the coverage area of the sound absorption cotton is smaller than or equal to the surface area of the front surface of the piezoelectric ceramic piece.
The sound-absorbing cotton is covered on the piezoelectric ceramic piece, so that the contact area of the piezoelectric ceramic piece and the foaming adhesive is reduced, and the aim of improving the sensitivity of a product is fulfilled; the sound-absorbing cotton covered on the piezoelectric ceramic piece ensures that the foaming glue is not in direct contact with the piezoelectric ceramic piece, thereby solving the problem that the amplitude and the sensitivity of the product are greatly reduced after the piezoelectric ceramic piece is bonded by the foaming glue.
Furthermore, the piezoelectric ceramic piece is positioned at the bottom of the cavity, and sound absorption cotton is arranged on the front side of the piezoelectric ceramic piece; the piezoelectric ceramic piece and the sound-absorbing cotton are packaged in the cavity through the foaming adhesive, so that the contact area of the piezoelectric ceramic piece and the foaming adhesive is reduced, and the purpose of improving the product sensitivity is achieved.
Further, the housing is made of a resin material, a plastic material or an aluminum material.
Furthermore, the piezoelectric ceramic piece is of a double-sided electrode structure, and the back of the piezoelectric ceramic piece is fixed at the bottom in the shell through silver colloid.
Further, the foaming adhesive is silicone or PE material.
Further, the foaming adhesive is a normal-temperature foaming adhesive.
Further, the density of the foaming glue is gradually increased along the upward direction of the bottom of the shell.
Further, be equipped with the polyurethane layer on the foaming glue, be equipped with the silica gel layer on the polyurethane layer.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model relates to an ultrasonic sensor containing sound-absorbing cotton, which covers a piece of sound-absorbing cotton on a piezoelectric ceramic piece, reduces the contact area between the piezoelectric ceramic piece and the foaming adhesive, thereby achieving the purpose of improving the sensitivity of the product; the sound-absorbing cotton covered on the piezoelectric ceramic piece ensures that the foaming glue is not in direct contact with the piezoelectric ceramic piece, thereby solving the problem that the amplitude and the sensitivity of the product are greatly reduced after the piezoelectric ceramic piece is bonded by the foaming glue.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the local enlarged structure of the present invention;
fig. 3 is a working principle diagram of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a piezoelectric ceramic sheet; 2-a shell; 3-sound absorbing cotton; 4-foaming glue; 5-a polyurethane layer; 6-silica gel layer; 7-a first lead; 8-second lead.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the present invention.
Examples
As shown in FIG. 1, the present invention relates to an ultrasonic sensor with sound-absorbing cotton, wherein the sound-absorbing cotton with processed size (e.g. 3mm in length and 3mm in width and 1mm in thickness, which can be adjusted according to the size of the actual piezoelectric ceramic plate and the inner cavity of the product) is covered on the surface of the piezoelectric ceramic plate before foaming adhesive, and then foaming adhesive is applied. The sound-absorbing cotton covered on the piezoelectric ceramic piece enables the foaming adhesive not to be in direct contact with the piezoelectric ceramic piece, so that the problem that the amplitude of the piezoelectric ceramic piece is greatly reduced after the piezoelectric ceramic piece is bonded by the foaming adhesive is solved, as shown in figure 3, the amplitude of a product is increased from the previous average 2.5dB to the average 4dB, the sensitivity is increased from the previous average 200us to the average 280us, and the sensitivity of the product is improved by 40%. The above changes further ensure the product quality and customer acceptance.
As shown in fig. 2, an ultrasonic sensor containing sound-absorbing cotton includes a piezoelectric ceramic plate 1 and a housing 2, the housing 2 includes a cavity, and the piezoelectric ceramic plate 1 is disposed at the bottom of the cavity; further comprising: the sound absorption cotton 3, the first lead 7 and the second lead 8; the first lead 7 is connected with the piezoelectric ceramic piece 1, and the second lead 8 is connected with the shell 2; the piezoelectric ceramic piece 1 is provided with sound absorption cotton 3; the first lead and the second lead are signal lines;
the coverage area of the sound absorption cotton 3 is smaller than or equal to the surface area of the front surface of the piezoelectric ceramic piece 1.
The sound absorption cotton 3 is covered on the piezoelectric ceramic piece 1, so that the contact area between the piezoelectric ceramic piece 1 and the foaming adhesive 4 is reduced, and the aim of improving the product sensitivity is fulfilled; the sound-absorbing cotton 3 covered on the piezoelectric ceramic piece 1 ensures that the foaming adhesive 4 is not in direct contact with the piezoelectric ceramic piece 1, thereby solving the problem that the amplitude and the sensitivity of the product are greatly reduced after the piezoelectric ceramic piece 1 is bonded by the foaming adhesive 4.
The piezoelectric ceramic piece 1 is positioned at the bottom of the cavity, and the front side of the piezoelectric ceramic piece 1 is provided with sound absorption cotton 3; the piezoelectric ceramic piece 1 and the sound-absorbing cotton 3 are packaged in the cavity through the foaming adhesive 4, so that the contact area of the piezoelectric ceramic piece 1 and the foaming adhesive 4 is reduced, and the purpose of improving the product sensitivity is achieved.
The housing 2 is made of a resin material, plastic or aluminum material. The piezoelectric ceramic piece 1 is of a double-sided electrode structure, and the back of the piezoelectric ceramic piece 1 is fixed at the bottom in the shell through silver colloid. The foaming glue 4 is silicone or PE material. The foaming adhesive 4 is a normal-temperature foaming adhesive. The density of the foam rubber 4 is gradually increased from the bottom of the shell 2 to the upper direction. The foaming adhesive 4 is provided with a polyurethane layer 5, and the polyurethane layer 5 is provided with a silica gel layer 6. The silica gel layer and the polyurethane layer are used for water resistance.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. An ultrasonic sensor containing sound absorption cotton comprises a piezoelectric ceramic piece (1) and a shell (2), wherein the shell (2) comprises a cavity, and the piezoelectric ceramic piece (1) is arranged at the bottom of the cavity; it is characterized by also comprising: the sound absorption cotton (3), the first lead (7) and the second lead (8); the first lead (7) is connected with the piezoelectric ceramic piece (1), and the second lead (8) is connected with the shell (2); the piezoelectric ceramic piece (1) is provided with sound-absorbing cotton (3);
the coverage area of the sound absorption cotton (3) is smaller than or equal to the surface area of the front surface of the piezoelectric ceramic piece (1).
2. The ultrasonic sensor containing the sound-absorbing cotton according to claim 1, further comprising a foam adhesive (4) for encapsulating the piezoelectric ceramic plate (1) and the sound-absorbing cotton (3) in the cavity through the foam adhesive (4).
3. The ultrasonic sensor containing sound-absorbing cotton as claimed in claim 1, wherein the housing (2) is made of plastic or aluminum material.
4. The ultrasonic transducer with the sound-absorbing cotton as claimed in claim 1, wherein the piezoelectric ceramic plate (1) is of a double-sided electrode structure, and the back surface of the piezoelectric ceramic plate (1) is fixed at the bottom in the shell (2) through silver paste.
5. The ultrasonic sensor containing the sound-absorbing cotton as claimed in claim 2, wherein the foam (4) is silicone or PE material.
6. The ultrasonic sensor containing the sound-absorbing cotton as claimed in claim 5, wherein the foam rubber (4) is a normal temperature foam rubber.
7. The ultrasonic sensor containing sound-absorbing cotton as claimed in claim 2, wherein the density of the foam (4) is gradually increased along the bottom of the housing (2).
8. The ultrasonic sensor containing the sound-absorbing cotton as claimed in claim 7, wherein a polyurethane layer (5) is provided on the foam (4), and a silicone layer (6) is provided on the polyurethane layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120723127.1U CN214333833U (en) | 2021-04-09 | 2021-04-09 | Ultrasonic sensor containing sound-absorbing cotton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120723127.1U CN214333833U (en) | 2021-04-09 | 2021-04-09 | Ultrasonic sensor containing sound-absorbing cotton |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214333833U true CN214333833U (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120723127.1U Active CN214333833U (en) | 2021-04-09 | 2021-04-09 | Ultrasonic sensor containing sound-absorbing cotton |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214333833U (en) |
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2021
- 2021-04-09 CN CN202120723127.1U patent/CN214333833U/en active Active
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