Sensor shielding device

Abstract

The utility model provides a sensor shielding device. The sensor shielding device comprises an upper shell and a lower shell which are matched with the structure of a sensor to be shielded. Wherein the upper shell and the lower shell are assembled to form a shielding cavity for accommodating the sensor; moreover, a transmission channel for transmitting a detection signal is formed in the shielding cavity, and the sensor collects an external signal through the transmission channel. According to the utility model, the problems of space magnetic field interference and current interference near the sensor can be solved, and the accuracy of the sensor is improved.

Description

Technical Field

[0001] This utility model relates to the field of microphone technology, and more specifically, to a sensor shielding device. Background Technology

[0002] Coreless current sensors mainly refer to current sensors without an iron core, also known as coreless current sensors. The main characteristic of this type of sensor is that its core does not use an iron core, but instead achieves current detection through other means, such as the Hall effect.

[0003] Currently, the magnetic shielding structure for ring-shaped coreless current sensors is generally wrapped with magnetic material with adhesive backing. The magnetic material is usually an amorphous ribbon with high magnetic permeability. This not only requires manual operation, which makes the process cumbersome, but also easily causes overlap, forming a "short-circuit loop" that affects the product's test results. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a sensor shielding device to solve the problems of cumbersome procedures, high labor costs, and easy overlap that affect the product testing quality of existing sensor shielding methods.

[0005] The sensor shielding device provided by this utility model includes an upper shell and a lower shell adapted to the structure of the sensor to be shielded; wherein...

[0006] The upper shell and the lower shell are assembled to form a shielded cavity to accommodate the sensor; and,

[0007] A transmission channel for transmitting detection signals is formed on the shielded cavity, and the sensor collects external signals through the transmission channel.

[0008] In addition, optional structural features include that neither the upper shell nor the lower shell has an annular structure; a first positioning structure is provided on the upper shell, and a second positioning structure adapted to the first positioning structure is provided on the lower shell;

[0009] The upper shell and the lower shell are positioned and assembled using the first positioning structure and the second positioning structure.

[0010] In addition, an optional structural feature is that the first positioning structure is a first threaded portion provided on the upper shell, and the second positioning structure is a second threaded portion provided on the lower shell;

[0011] The first threaded portion and the second threaded portion are compatible internal and external thread structures.

[0012] In addition, optional structural features are,

[0013] The outer edge arms of the upper shell and the lower shell are threadedly connected by the first threaded portion and the second threaded portion;

[0014] The inner edge arms of the upper shell and the lower shell are spaced apart to form the transmission channel.

[0015] In addition, an optional structural feature is that the gap of the transmission channel is 1mm to 3mm.

[0016] In addition, an optional structural feature is that the first positioning structure is a first limiting step provided on the upper shell, and the second positioning structure is a second limiting step provided on the lower shell;

[0017] The first limiting step and the second limiting step are interlocked and limited.

[0018] In addition, an optional structural feature is that a positioning hole is provided on the upper shell, and a positioning seat corresponding to the position of the positioning hole is provided on the lower shell;

[0019] The upper shell and the lower shell are fixed together by bolts that pass through the positioning hole and the positioning seat.

[0020] In addition, an optional structural feature is that at least one clearance groove is provided on the end face of the inner edge arm of the lower shell;

[0021] At least one extension arm is provided on the inner edge arm of the upper shell;

[0022] After the upper shell and the lower shell are assembled, the extension arm extends into the corresponding clearance groove and is distributed at intervals with the clearance groove;

[0023] The gap between the extension arm and the clearance groove forms a zigzag transmission channel.

[0024] In addition, an optional structural feature is that the gap of the transmission channel is 0.2 mm to 0.4 mm.

[0025] In addition, an optional structural feature is that the sensor is attached to the inner wall of the lower shell or the upper shell; or,

[0026] A positioning boss is provided inside the lower shell or the upper shell, and the sensor is fixed to the positioning boss by pasting or bolting.

[0027] Using the aforementioned sensor shielding device, a shielding cavity for accommodating the sensor is formed by assembling the upper and lower shells, and a transmission channel for transmitting detection signals is formed on the shielding cavity. This can solve the problems of interference from external magnetic fields and nearby currents, while enabling the sensor to collect external signals through the transmission channel. The structure is simple, easy to assemble, and applicable to various sensor shielding scenarios of different sizes and types.

[0028] To achieve the foregoing and related objectives, one or more aspects of the present invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the present invention. However, these aspects indicate only a few of the various ways in which the principles of the present invention can be used. Furthermore, the present invention is intended to include all such aspects and their equivalents. Attached Figure Description

[0029] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0030] Figure 1 This is a cross-sectional view of the sensor shielding device according to Embodiment 1 of the present invention;

[0031] Figure 2 This is a perspective view of the upper shell according to Embodiment 1 of the present utility model;

[0032] Figure 3 This is a plan view of the upper shell according to Embodiment 1 of the present utility model;

[0033] Figure 4 This is a cross-sectional view of the upper shell according to Embodiment 1 of the present invention;

[0034] Figure 5 This is a perspective view of the lower shell according to Embodiment 1 of the present utility model;

[0035] Figure 6 This is a cross-sectional view of the lower shell according to Embodiment 1 of the present invention;

[0036] Figure 7 This is a schematic diagram of the sensor structure according to an embodiment of the present invention;

[0037] Figure 8 This is a cross-sectional view of the sensor shielding device according to Embodiment 2 of the present invention;

[0038] Figure 9 This is a top view of the sensor shielding device according to Embodiment 2 of this utility model;

[0039] Figure 10 This is a plan view of the upper shell according to Embodiment 2 of the present invention;

[0040] Figure 11 This is a perspective view of the lower shell according to Embodiment 2 of the present invention;

[0041] Figure 12 This is a plan view of the lower shell according to Embodiment 2 of the present invention;

[0042] Figure 13 This is a perspective view of the sensor shielding device according to Embodiment 2 of the present invention.

[0043] The markings in the attached diagram include: upper shell 10, lower shell 20, transmission channel 3, positioning boss 4, external thread 11, signal line lead-out hole 5, internal thread 21, sensor 6, mounting hole 61, transmission channel 7, upper shell 30, positioning hole 31, signal line lead-out hole 32, extension arm 33, lower shell 40, positioning seat 41, second limiting step 42, and clearance groove 43.

[0044] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0046] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0047] In the description of this utility model, it should be understood that the following terms, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential", indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the content or structure of this utility model.

[0048] To describe in detail the structure of the sensor shielding device of this utility model, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0049] Figures 1 to 7 The schematic structure of the sensor shielding device according to Embodiment 1 of this utility model is shown from different angles.

[0050] like Figures 1 to 7 As shown in the figure, the sensor shielding device of the present invention includes an upper shell 10 and a lower shell 20 adapted to the structure of the sensor to be shielded; wherein, the upper shell 10 and the lower shell 20 are assembled to form a shielding cavity for accommodating the sensor 6; and, a transmission channel 3 for transmitting detection signals is formed on the shielding cavity formed by the upper shell 10 and the lower shell 20, the sensor 6 is confined in the shielding cavity, the shielding cavity shields external interference, and at the same time ensures that the sensor 6 collects external signals through the transmission channel 3.

[0051] For sensors with different structures, corresponding upper and lower shell structures can be set. When the sensor is a ring current sensor, the upper shell 10 and lower shell 20 can be set as ring structures. Taking this as an example, to simplify the assembly of the upper shell 10 and lower shell 20, a first positioning structure is provided on the upper shell 10, and a second positioning structure adapted to the first positioning structure is provided on the lower shell 20. The upper shell 10 and lower shell 20 are positioned and assembled through the first positioning structure and the second positioning structure. In this embodiment, the first positioning structure is a first threaded portion provided on the upper shell 10, and the second positioning structure is a second threaded portion provided on the lower shell 20. The first threaded portion and the second threaded portion are adapted internal and external thread structures.

[0052] Specifically, an internal thread is provided on the inner edge of the lower shell 20 (outer edge arm), and an external thread 11 is provided on the outer edge of the upper shell 10 (outer edge arm). The upper shell 10 and the lower shell 20 are connected by the engagement of the external thread 11 and the internal thread. Alternatively, an internal thread can be provided on the upper shell 10 and an external thread can be provided on the lower shell 20, so that the two can be assembled to form a shielding device with a regular shape.

[0053] Since the upper shell 10 and lower shell 20 are annular structures, including circular inner edge arms and circular outer edge arms, the outer edge arms of the upper shell 10 and lower shell 20 are threaded together by a first thread and a second thread. The height of the inner edge arms of the upper shell 10 and lower shell 20 is less than the height of the outer edge arms, and the inner edge arms are of the same size and spaced apart, forming a transmission channel 3 structure, enabling the sensor 6 to collect external environmental information. It can be seen that if the size of the transmission channel 3 is too small, it will affect the detection effect of the sensor 6, while if the size of the transmission channel 3 is too large, it will affect the shielding effect of the device. Therefore, in the specific embodiment of this utility model, the gap of the transmission channel 3 can be set to 1mm to 3mm, for example, 1.5mm, 2mm or 2.5mm; preferably, after the upper shell 10 and lower shell 20 are assembled, the gap between the inner edge arms of the upper shell 10 and lower shell 20 is 1mm; the size of the transmission channel 3 can be flexibly set according to the shape, size and shielding requirements of the sensor 6.

[0054] It should be noted that the sensor 6 is attached to the inner wall of the lower shell 20 or the upper shell 10; alternatively, a positioning boss 4 is provided inside the lower shell 20 or the upper shell 10, and the sensor 6 is attached or bolted to the positioning boss 4. In this first embodiment, four positioning bosses 4 are provided inside the lower shell 20, corresponding mounting holes 61 are provided on the sensor 6, and signal line lead-out holes 5 are provided on the upper shell 10.

[0055] As an example, during the assembly of the ring-shaped Coreless current sensor, the ring-shaped Coreless current sensor can be positioned in the lower housing 20 through the mounting hole 61, or epoxy resin or other suitable structural adhesive can be poured into the lower housing 20 to bond the ring-shaped Coreless current sensor to the lower housing 20. Then, the signal line of the ring-shaped Coreless current sensor is led out from the signal line lead-out hole 5 of the upper housing 10. Finally, the upper housing 10 and the lower housing 20 are assembled together using the threaded structure. The outer edge arms of the entire device are connected together by threads, providing good shielding. The inner edge arms have gaps, allowing the magnetic field generated by the current passing through the ring center of the device to enter the shielding cavity, while the magnetic fields generated by currents in other directions and stray magnetic fields in space are shielded.

[0056] Figures 8 to 13 The schematic structure of the sensor shielding device according to Embodiment 2 of this utility model is shown from different angles.

[0057] like Figures 8 to 13 As shown in the figure, the sensor shielding device of the second embodiment of the present invention includes an upper shell 30 and a lower shell 40 adapted to the structure of the sensor to be shielded; wherein, the upper shell 30 and the lower shell 40 are assembled to form a shielding cavity for accommodating the sensor 6; and, a transmission channel 7 for transmitting detection signals is formed on the shielding cavity, the sensor 6 is confined in the shielding cavity, the shielding cavity shields external interference, and at the same time ensures that the sensor 6 collects external signals through the transmission channel 7.

[0058] Specifically, for sensors with different structures, corresponding upper and lower shell structures can be set. When the sensor is a ring current sensor, the upper shell 30 and lower shell 40 can be set as ring structures. Taking this as an example, a first positioning structure is set on the upper shell 30, and a second positioning structure adapted to the first positioning structure is set on the lower shell 40. The upper shell 30 and lower shell 40 are positioned and assembled through the first and second positioning structures. In this embodiment, the first positioning structure is a first limiting step set on the upper shell 30, and the second positioning structure is a second limiting step 42 set on the lower shell 40. The first limiting step and the second limiting step 42 are interlocked and limited, and the assembled upper shell 30 and lower shell 40 have a regular shape structure.

[0059] Among them, to ensure the overall reliability of the device, positioning holes 31 can also be provided on the upper shell 30, and positioning seats 41 corresponding to the positions of the positioning holes 31 are provided on the lower shell 40. The upper shell 30 and the lower shell 40 are fixedly connected by bolts penetrating through the positioning holes 31 and the positioning seats 41. In addition, multiple positioning holes can be provided on the lower shell 40, with some of the positioning holes used to fix the sensor 6 and some used for fixing with the upper shell 30; or, the upper shell 30, the sensor 6 and the lower shell 40 are directly fixed by bolts, that is, the positioning of the upper shell 30, the lower shell 40 and the sensor 6 is achieved through one bolt.

[0060] In addition, at least one avoidance groove 43 is provided on the end face of the inner edge arm of the lower shell 40, and at least one extension arm 33 is provided on the inner edge arm of the upper shell 30. After the upper shell 30 and the lower shell 40 are assembled, the extension arm 33 extends into the corresponding avoidance groove 43 and is distributed at intervals with the avoidance groove 43. The gap between the extension arm 33 and the avoidance groove 43 forms a zigzag transmission channel 7; among them, when both the avoidance groove 43 and the extension arm 33 are provided with one, the transmission channel 7 is a "ji" - shaped structure, and the gap of the transmission channel 7 is 0.2 mm to 0.4 mm.

[0061] As a specific example, the heights of the inner edge arm and the outer edge arm of the upper shell 30 are the same, and it can be convex or concave. The heights of the inner edge arm and the outer edge arm of the lower shell 40 are the same, and it can be concave or convex. The convex and concave structures of the upper shell 30 and the lower shell 40 are adapted to each other, and a gap of 0.2 mm, 0.25 mm, 0.3 mm or 0.35 mm can be left between them. Specifically, it can be set according to the size, structure and shielding requirements of the sensor 6.

[0062] As an example, during the assembly process of the annular Coreless current sensor, the annular Coreless current sensor can be positioned in the lower shell 30 through the mounting hole 61, or epoxy resin or other suitable structural adhesives can be poured into the lower shell 30 to bond the annular Coreless current sensor with the lower shell 30 together. Then, the signal wire of the annular Coreless current sensor is led out from the signal wire leading hole 32 of the upper shell 40; finally, the upper shell and the lower shell can be assembled together with bolts through the positioning holes 31. The outer edge cross - section of the upper shell and the lower shell is in a stepped fit, and the outer edge arms of the assembled shell form an effective shielding box body; the inner edge arms of the upper shell and the lower shell are in a concave - convex fit with a gap, so that the magnetic field of the through - hole current can be introduced.

[0063] It should be noted that in the above two embodiments, the shapes of the upper and lower shells can be set accordingly based on the shape of the sensor. The sensor shown in the attached figure is a ring-shaped coreless current sensor, which is attached to the inner wall of the lower or upper shell; or, at least three positioning bosses are provided in the lower or upper shell, and the sensor is attached or bolted to the positioning bosses; in other words, the sensor is fixed to the positioning bosses by bolts, or the positioning bosses are only used for positioning, and the sensor can be positioned in the entire lower or upper shell by epoxy resin or polyurethane colloid.

[0064] According to the above-mentioned sensor shielding device, a shielding cavity for accommodating the sensor is formed by a detachable upper shell and a lower shell, and a transmission channel for transmitting detection signals is formed on the inner edge of the upper shell and the lower shell. This can solve the problems of interference from external magnetic fields and nearby currents, while enabling the sensor to collect external signals through the transmission channel. The overall structure of the device is simple and easy to assemble, and it can be applied to various types and shapes of sensors.

[0065] The sensor shielding device according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the sensor shielding device proposed in the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A sensor shielding device, characterized in that, This includes an upper shell and a lower shell adapted to the structure of the sensor to be shielded; wherein, The upper shell and the lower shell are assembled to form a shielded cavity to accommodate the sensor; and, A transmission channel for transmitting detection signals is formed on the shielded cavity, and the sensor collects external signals through the transmission channel; Both the upper shell and the lower shell are annular structures, and the inner edge arms of the upper shell and the lower shell are spaced apart to form the transmission channel.

2. The sensor shielding device according to claim 1, characterized in that, A first positioning structure is provided on the upper shell, and a second positioning structure adapted to the first positioning structure is provided on the lower shell; The upper shell and the lower shell are positioned and assembled using the first positioning structure and the second positioning structure.

3. The sensor shielding device according to claim 2, characterized in that, The first positioning structure is a first threaded portion provided on the upper shell, and the second positioning structure is a second threaded portion provided on the lower shell; The first threaded portion and the second threaded portion are compatible internal and external thread structures.

4. The sensor shielding device according to claim 3, characterized in that, The outer edge arms of the upper shell and the lower shell are threaded together by the first threaded portion and the second threaded portion.

5. The sensor shielding device according to claim 4, characterized in that, The gap in the transmission channel is 1mm to 3mm.

6. The sensor shielding device according to claim 2, characterized in that, The first positioning structure is a first limiting step provided on the upper shell, and the second positioning structure is a second limiting step provided on the lower shell; The first limiting step and the second limiting step are interlocked and limited.

7. The sensor shielding device according to claim 6, characterized in that, A positioning hole is provided on the upper shell, and a positioning seat corresponding to the position of the positioning hole is provided on the lower shell; The upper shell and the lower shell are fixed together by bolts that pass through the positioning hole and the positioning seat.

8. The sensor shielding device according to claim 6, characterized in that, At least one clearance groove is provided on the end face of the inner edge arm of the lower shell; At least one extension arm is provided on the inner edge arm of the upper shell; After the upper shell and the lower shell are assembled, the extension arm extends into the corresponding clearance groove and is distributed at intervals with the clearance groove; The gap between the extension arm and the clearance groove forms a zigzag transmission channel.

9. The sensor shielding device according to claim 8, characterized in that, The gap in the transmission channel is 0.2mm to 0.4mm.

10. The sensor shielding device according to claim 1, characterized in that, The sensor is attached to the inner wall of the lower shell or the upper shell; or, A positioning boss is provided inside the lower shell or the upper shell, and the sensor is fixed to the positioning boss by pasting or bolting.

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