Anti-interference ultrasonic sensor

Abstract

The utility model belongs to the technical field of ultrasonic sensors, and particularly discloses an anti-interference ultrasonic sensor which comprises a ceramic chip assembly and a copper shell, one end of the copper shell is open, the other end of the copper shell is a closed end, the anti-interference ultrasonic sensor further comprises a foaming silicon rubber case, the interior of the foaming silicon rubber case is hollow, one end of the foaming silicon rubber case is open, and the other end of the foaming silicon rubber case is a closed end. The ceramic chip assembly is located in the foaming silicon rubber case and is in close fit with the foaming silicon rubber case, and the closed end of the foaming silicon rubber case and the closed end of the copper shell are both provided with circuit holes and air holes; the copper shell covers the outer side of the foaming silicon rubber sleeve and is in close fit with the foaming silicon rubber sleeve; sealing glue is injected into a hollow cavity between the foaming silicon rubber sleeve and the ceramic chip assembly. According to the utility model, anti-interference of the ultrasonic sensor can be realized, and working procedures can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic sensor technology, and specifically to an anti-interference ultrasonic sensor. Background Technology

[0002] Currently, high-frequency sensors primarily use copper shells for electromagnetic wave shielding. However, copper shells mainly shield electromagnetic waves through reflection. At high frequencies, this can lead to multiple reflections, eventually causing leakage through gaps. To create a sealed, interference-resistant environment, existing high-frequency sensors use silicone rings to shield the gap between the bottom copper shell and the matching layer. Specifically: [The text abruptly ends here, likely due to an incomplete translation or missing information.] Figure 5 and Figure 6 As shown, glue is applied to the silicone ring to fix it to the matching layer. The ceramic sheet assembly is covered with a copper shell except for the bottom working surface. Since the silicone ring and the copper shell are two separate parts, a conductive material is needed to bond the copper shell and the silicone ring after assembling the copper shell. After assembling the copper shell, sound-absorbing material is filled into the copper shell and silicone is potted.

[0003] The assembled sensor's ceramic chip assembly forms a sealed shielding environment, ultimately achieving anti-interference. In contrast, adhesive bonding has lower reliability, is prone to detachment, creating gaps between the copper shell and silicone ring, leading to electromagnetic wave leakage, reduced shielding effectiveness, and interference. Furthermore, the entire process is complex, involving multiple adhesive application steps, long waiting times, and high process and material costs. Utility Model Content

[0004] This invention provides an anti-interference ultrasonic sensor, which aims to reduce the number of processes while achieving anti-interference capabilities.

[0005] This utility model is achieved through the following technical solution: an anti-interference ultrasonic sensor, including a ceramic plate assembly and a copper shell, one end of the copper shell is open and the other end is closed, and also includes a foamed silicone sleeve, the inside of the foamed silicone sleeve is hollow, and one end of the foamed silicone sleeve is open and the other end is closed.

[0006] The ceramic sheet assembly is located inside the foamed silicone sleeve and fits tightly with the foamed silicone sleeve. Both the closed end of the foamed silicone sleeve and the closed end of the copper shell are provided with circuit holes and air holes.

[0007] The copper shell is disposed on the outside of the foamed silicone sleeve and fits tightly with the foamed silicone sleeve; the hollow cavity between the foamed silicone sleeve and the ceramic sheet assembly is filled with sealant.

[0008] Compared with existing technologies, this solution has the following advantages and beneficial effects:

[0009] In this solution, the foamed silicone sleeve can directly replace the copper shell in connection with the silicone ring and adhesive material. By directly assembling the open end of the foamed silicone sleeve around the ceramic plate assembly and tightly fitting it with the ceramic plate assembly, all surfaces of the ceramic plate assembly except the bottom working surface can be covered, so that the area around the ceramic plate assembly is completely shielded, achieving the purpose of anti-interference. Using the foamed silicone sleeve assembly can also reduce the residual vibration of the sensor without reducing the sensitivity, making the sensor performance better.

[0010] This solution uses a foamed silicone sleeve for assembly. The foamed silicone sleeve fits tightly with the ceramic sheet assembly, eliminating the need for separate glue fixation. The foamed silicone sleeve fits tightly with the copper shell, so no conductive material is needed for bonding. The foamed silicone sleeve is made of foamed silicone, so no sound-absorbing material needs to be filled after assembly. This reduces the material cost, processing cost, and processing steps of the three processes: silicone ring and ceramic sheet assembly, copper shell and silicone ring, and filling with sound-absorbing material.

[0011] Furthermore, the foamed silicone sleeve is cylindrical, and the shape of the foamed silicone sleeve matches the shape of the copper shell.

[0012] Beneficial effects: This setup allows for a higher degree of fit between the foamed silicone sleeve and the copper shell, resulting in higher operational efficiency during assembly.

[0013] Furthermore, the bottom of the ceramic sheet assembly is flush with the bottom of the foamed silicone sleeve.

[0014] Beneficial effects: This setup can further improve the sealing between the ceramic plate assembly and the foamed silicone sleeve, while making the assembled ultrasonic sensor more aesthetically pleasing and flat.

[0015] Furthermore, the sealant is silicone.

[0016] Beneficial effects: The sealant in this solution is made of silicone, which has stable chemical properties.

[0017] Furthermore, the ceramic sheet assembly is located inside the foamed silicone sleeve and is interference-fitted with the foamed silicone sleeve.

[0018] Beneficial effects: The ceramic sheet assembly and the foamed silicone sleeve in this solution are tightly fitted by an interference fit. The assembly method is simple and does not require the use of other connecting materials, which saves assembly process steps, thereby improving assembly efficiency and cost.

[0019] Furthermore, the ceramic sheet assembly includes a ceramic sheet and a matching layer, the ceramic sheet and the matching layer are coaxially connected, and the matching layer is interference-fitted with the foamed silicone sleeve.

[0020] Beneficial effects: In this solution, the diameter of the matching layer is usually larger than that of the ceramic sheet. The matching layer and the foamed silicone sleeve can be interference-fitted to achieve a tight fit with the ceramic sheet assembly as a whole.

[0021] Furthermore, both the wiring hole and the air hole are provided, with the air hole centrally located and the wiring hole located to one side of the air hole.

[0022] Beneficial effects: In this design, the wiring hole is for the passage of the sensor wiring, and the vent facilitates heat dissipation inside the sensor. Furthermore, since the foamed silicone sleeve is made of foamed silicone, no additional sound-absorbing material is needed after assembly. Therefore, only one wiring hole is required on the foamed silicone sleeve and the copper shell, unlike existing technologies where a separate hole needs to be made on the copper shell in addition to the wiring hole to facilitate the filling of sound-absorbing material.

[0023] Furthermore, the circuit hole consists of two interconnected circular holes.

[0024] Beneficial effects: In this design, the wiring hole consists of two interconnected circular holes, which increases the area of ​​the wiring hole. This allows the sensor wiring to pass through and also facilitates the injection of sealant into the inner cavity of the foamed silicone sleeve through the wiring hole.

[0025] Furthermore, the foamed silicone sleeve is a foamed conductive silicone sleeve.

[0026] Beneficial effects: The conductive foamed silicone sleeve can not only reflect electromagnetic waves, but also has absorption capabilities. It can absorb the high-frequency electromagnetic wave energy that is not reflected, thus preventing electromagnetic wave leakage in all aspects and achieving the purpose of anti-interference.

[0027] Furthermore, the foamed silicone sleeve is interference-fitted with the copper shell.

[0028] Beneficial effects: In this solution, the foamed silicone sleeve and the copper shell are interference-fitted to achieve a tight fit between the two. This fit is simple and requires no other connecting materials. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is an exploded view of an embodiment of an anti-interference ultrasonic sensor according to the present invention;

[0031] Figure 2 This is a perspective view of an embodiment of an anti-interference ultrasonic sensor according to the present invention;

[0032] Figure 3This is a schematic diagram of the assembly between the foamed silicone sleeve and the ceramic sheet assembly in an embodiment of an anti-interference ultrasonic sensor of this utility model.

[0033] Figure 4 This is a perspective view of a foamed silicone sleeve, which is an embodiment of an anti-interference ultrasonic sensor according to the present invention.

[0034] Figure 5 This is a three-dimensional view of the connection between the ceramic sheet assembly and the silicone ring in the prior art;

[0035] Figure 6 This is a 3D view of an ultrasonic sensor in the prior art.

[0036] The attached diagram shows the markings and corresponding component names:

[0037] 1. Copper shell, 2. Foamed silicone sleeve, 3. Ceramic sheet assembly, 301. Ceramic sheet, 302. Matching layer, 4. Conducting wire, 5. Line hole, 6. Air hole. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0039] Example 1

[0040] like Figures 1-3 As shown, this embodiment 1 provides an anti-interference ultrasonic sensor, including a ceramic plate assembly 3 and a copper shell 1. One end of the copper shell 1 is open and the other end is closed. The ceramic plate assembly 3 includes a ceramic plate 301 and a matching layer 302. The ceramic plate 301 and the matching layer 302 are coaxially connected. The connection and mating relationship between the ceramic plate 301 and the matching layer 302 adopts the prior art, which will not be described in detail here.

[0041] The anti-interference ultrasonic sensor in this embodiment also includes a foamed silicone sleeve 2. The foamed silicone sleeve 2 is hollow inside, with one end open and the other end closed. In this embodiment, the foamed silicone sleeve 2 is cylindrical, and the shape of the foamed silicone sleeve 2 matches the shape of the copper shell 1. The foamed silicone sleeve 2 is a sleeve-shaped structure made of foamed silicone material in the prior art.

[0042] The ceramic sheet assembly 3 is located inside the foamed silicone sleeve 2 and is tightly fitted with the foamed silicone sleeve 2. In this embodiment, the bottom of the ceramic sheet assembly 3 is flush with the bottom of the foamed silicone sleeve 2. The ceramic sheet assembly 3 is located inside the foamed silicone sleeve 2 and is interference-fitted with the foamed silicone sleeve 2. That is, the matching layer 302 in the ceramic sheet assembly 3 is flush with the bottom of the foamed silicone sleeve 2 and is interference-fitted with the foamed silicone sleeve 2.

[0043] Combination Figure 4 As shown, both the closed end of the foamed silicone sleeve 2 and the closed end of the copper shell 1 are provided with wiring holes and air holes. During assembly, the wiring holes 5 and air holes 6 on the foamed silicone sleeve 2 correspond to the wiring holes and air holes on the copper shell 1, respectively.

[0044] In this embodiment, both a circuit hole 5 and an air hole 6 are provided. The air hole 6 is centrally located, and the circuit hole 5 is located on one side of the air hole 6. In this embodiment, the circuit hole 5 is composed of two interconnected circular holes, thereby increasing the area of ​​the circuit hole 5. After the sensor's power wire 4 passes through, there are still some holes left, which facilitates the later filling of sealant into the foamed silicone sleeve 2.

[0045] The copper shell 1 is placed on the outside of the foamed silicone sleeve 2 and is tightly fitted with the foamed silicone sleeve 2. In this embodiment, the foamed silicone sleeve 2 and the copper shell 1 are interference-fitted.

[0046] The hollow cavity between the foamed silicone sleeve 2 and the ceramic sheet assembly 3 is filled with sealant. In this embodiment, the sealant is silicone. When the sealant is injected into the foamed silicone sleeve 2, liquid silicone is injected. After the liquid silicone solidifies, it forms solid silicone.

[0047] The specific implementation process is as follows:

[0048] In this invention, the open side of the foamed silicone sleeve 2 is directly assembled to the area around the matching layer 302 with an interference fit to achieve a tight assembly, and its bottom is flush with the matching layer 302. Then, the copper shell 1 is fitted onto the outside of the foamed silicone sleeve 2 with an interference fit to achieve a tight assembly. This can cover all surfaces of the ceramic sheet assembly 3 except for the bottom working surface, so that the area around the ceramic sheet assembly 3 is completely shielded.

[0049] Finally, some silicone is injected into the hollow part inside the foamed silicone sleeve 2 for sealing.

[0050] Example 2

[0051] The difference between this embodiment and embodiment 1 is that the foamed silicone sleeve 2 in this embodiment is a foamed conductive silicone sleeve, that is, the foamed silicone sleeve 2 in this embodiment is made of foamed conductive silicone material, and metal powder is evenly distributed inside, so that the foamed silicone sleeve 2 has a conductive effect and can further improve the shielding performance.

[0052] The conductive foamed silicone sleeve 2 can not only reflect electromagnetic waves, but also has absorption capabilities. It can absorb the high-frequency electromagnetic wave energy that is not reflected, thus preventing electromagnetic wave leakage in all aspects and achieving the purpose of anti-interference.

[0053] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-interference ultrasonic sensor, comprising a ceramic plate assembly and a copper shell, wherein one end of the copper shell is open and the other end is closed, characterized in that, It also includes a foamed silicone sleeve, which is hollow inside, with one end open and the other end closed. The ceramic sheet assembly is located inside the foamed silicone sleeve and fits tightly with the foamed silicone sleeve. Both the closed end of the foamed silicone sleeve and the closed end of the copper shell are provided with circuit holes and air holes. The copper shell is disposed on the outside of the foamed silicone sleeve and fits tightly with the foamed silicone sleeve; the hollow cavity between the foamed silicone sleeve and the ceramic sheet assembly is filled with sealant.

2. The anti-interference ultrasonic sensor according to claim 1, characterized in that, The foamed silicone sleeve is cylindrical, and its shape matches that of the copper shell.

3. The anti-interference ultrasonic sensor according to claim 1, characterized in that, The bottom of the ceramic sheet assembly is flush with the bottom of the foamed silicone sleeve.

4. The anti-interference ultrasonic sensor according to claim 1, characterized in that, The sealant is silicone.

5. The anti-interference ultrasonic sensor according to claim 1, characterized in that, The ceramic sheet assembly is located inside the foamed silicone sleeve and is interference-fitted with the foamed silicone sleeve.

6. The anti-interference ultrasonic sensor according to claim 5, characterized in that, The ceramic sheet assembly includes a ceramic sheet and a matching layer, the ceramic sheet and the matching layer are coaxially connected, and the matching layer is interference-fitted with the foamed silicone sleeve.

7. An anti-interference ultrasonic sensor according to any one of claims 1-6, characterized in that, Both the wiring hole and the air hole are provided, with the air hole being centrally located and the wiring hole being located to one side of the air hole.

8. The anti-interference ultrasonic sensor according to claim 7, characterized in that, The circuit hole consists of two interconnected circular holes.

9. An anti-interference ultrasonic sensor according to any one of claims 1-6, characterized in that, The foamed silicone sleeve is a foamed conductive silicone sleeve.

10. An anti-interference ultrasonic sensor according to any one of claims 1-6, characterized in that, The foamed silicone sleeve is interference-fitted with the copper shell.

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