An electromagnetic interference shielded sensor

Abstract

The utility model relates to sensor equipment technical field, specifically disclose a kind of anti-electromagnetic interference protection sensor, including the sensor body of sliding connection in protective tube, and protective tube is equipped with PVC protective layer, graphene / polypyrrole shielding layer and PP insulating layer.Such as mounting seat is fixed through permanent magnet and mounting hole, and electric push rod drives sensor telescopic.Corresponding heat dissipation net is equipped with protective tube and the outer wall of sensor body, and heat dissipation net is aligned to form heat dissipation channel when retraction.The utility model realizes the synergic optimization of electromagnetic shielding, position adjustable and dynamic heat dissipation.

Description

Technical Field

[0001] This application relates to the field of sensor equipment technology, and specifically discloses a sensor with electromagnetic interference protection. Background Technology

[0002] In strong electromagnetic environments such as industrial automation and power monitoring, sensors face two major technical bottlenecks:

[0003] Electromagnetic interference issues:

[0004] Traditional metal shielding covers (such as copper mesh) are prone to eddy current effects in high-frequency electromagnetic fields, which can lead to sensor temperature rise and signal drift (error of ±5%).

[0005] Non-metallic shielding materials (such as conductive plastics) have problems such as low shielding effectiveness (<30dB) and poor mechanical strength, making it difficult to meet the requirements of IEC 61000-4-3 standard.

[0006] The contradiction between heat dissipation and fixed location:

[0007] Although the sealed protective structure can isolate dust / moisture, the heat buildup causes the sensor's lifespan to decrease by 50% for every 10°C increase in temperature.

[0008] Most existing adjustable position sensors adopt a manual extension and retraction design, which cannot achieve remote and precise control, and the original electromagnetic shielding integrity is destroyed after adjustment.

[0009] Therefore, the inventors have provided a sensor with electromagnetic interference protection to solve the above problems. Utility Model Content

[0010] The purpose of this invention is to provide a sensor with electromagnetic interference protection to solve the problems of existing sensors being susceptible to interference in electromagnetic environments, having poor heat dissipation, and being inconvenient to install and adjust.

[0011] To achieve the above objectives, the basic solution of this utility model provides a sensor with electromagnetic interference protection, including a protective tube and a sensor body slidably connected inside the protective tube. The protective tube is provided with a protective layer, a shielding layer and an insulating layer from the outside to the inside. It also includes a mounting base for mounting the protective tube and having a mounting structure. A driving component for driving the sensor body to slide is provided between the mounting base and the protective tube. The protective tube and the sensor body are also provided with heat dissipation structures for heat dissipation.

[0012] Furthermore, the driving component is a miniature electric push rod, the inner wall of the protective tube is provided with a guide groove, and the outer wall of the sensor body is provided with a sliding block that is slidably connected in the guide groove.

[0013] Furthermore, the shielding layer is a graphene coating or a polypyrrole coating, and the thickness of the coating is 0.5mm-1mm.

[0014] Furthermore, the mounting structure is a permanent magnet located at the bottom of the mounting base, and the mounting base is provided with several mounting holes.

[0015] Furthermore, the protective layer is made of polyvinyl chloride.

[0016] Furthermore, the insulating layer is made of PP material.

[0017] Furthermore, the heat dissipation structures are heat dissipation meshes respectively located on the outer walls of the protective tube and the sensor body, and the heat dissipation meshes face each other after the sensor is retracted.

[0018] The principle and effect of this basic scheme are as follows:

[0019] 1. Triple protection: The PVC protective layer is corrosion resistant, the graphene / polypyrrole shielding layer blocks electromagnetic interference, and the PP insulation layer prevents leakage and improves signal stability.

[0020] 2. Intelligent adjustment: The electric push rod drives the sensor to extend and retract, adapting to different detection depths;

[0021] 3. Synergistic heat dissipation: The dual heat dissipation meshes align to form an airflow channel when retracting, accelerating heat dissipation;

[0022] 4. Flexible installation: Dual modes of permanent magnet adsorption and mounting hole screw connection, suitable for metal / non-metal substrates. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of an electromagnetic interference-resistant sensor according to an embodiment of this application is shown.

[0025] Figure 2 A schematic diagram of the shielding layer of a sensor with electromagnetic interference protection according to an embodiment of this application is shown;

[0026] Figure 3 This paper shows a schematic diagram of the internal structure of the protective tube of a sensor with electromagnetic interference protection according to an embodiment of this application.

[0027] Figure 4 A schematic diagram of the sensor body of a sensor with electromagnetic interference protection according to an embodiment of this application is shown. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] The reference numerals in the accompanying drawings include: mounting base 1, miniature electric push rod 2, protective tube 3, sensor body 4, first heat dissipation mesh 5, protective layer 501, shielding layer 502, insulating layer 503, guide groove 6, second heat dissipation mesh 7, and sliding block 8.

[0030] A sensor with electromagnetic interference protection, implementing, for example Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown: It includes a protective tube 3 and a sensor body 4 slidably connected inside the protective tube 3. The protective tube 3 is provided with a protective layer 501, a shielding layer 502 and an insulating layer 503 from the outside to the inside. It also includes a mounting base 1 for mounting the protective tube 3 and having a mounting structure. A driving component for driving the sensor body 4 to slide is provided between the mounting base 1 and the protective tube 3. The protective tube 3 and the sensor body 4 are also provided with heat dissipation structures for heat dissipation.

[0031] Furthermore, the driving component is a miniature electric actuator 2, the inner wall of the protective tube 3 is provided with a guide groove 6, and the outer wall of the sensor body 4 is provided with a sliding block 8 that is slidably connected in the guide groove 6. The miniature electric actuator 2 can precisely control the sliding of the sensor body 4 in the protective tube 3, and the cooperation between the guide groove 6 and the sliding block 8 makes the sliding of the sensor body 4 more stable and smooth, avoiding deviation or jamming.

[0032] The shielding layer 502 is a graphene coating or a polypyrrole coating, and the thickness of the coating is 0.5mm-1mm. The graphene coating and the polypyrrole coating have good electromagnetic shielding performance, which can effectively block external electromagnetic interference and ensure the normal operation of the sensor body 4.

[0033] The mounting structure consists of a permanent magnet located at the bottom of the mounting base 1, which has several mounting holes. The permanent magnet allows the mounting base 1 to be easily attached to a metal surface for quick installation, while the mounting holes allow the mounting base 1 to be fixed to a non-magnetic material surface using screws or other connectors, increasing installation flexibility.

[0034] The protective layer 501 is made of polyvinyl chloride (PVC). PVC has good wear resistance, corrosion resistance and mechanical strength, and can effectively protect the internal shielding layer 502, insulation layer 503 and sensor body 4.

[0035] The insulating layer 503 is made of PP material. PP material has excellent insulation properties, which can prevent the sensor body 4 from being affected by external electric fields and ensure the measurement accuracy and stability of the sensor.

[0036] The heat dissipation structures are a first heat dissipation mesh 5 located on the outer wall of the protective tube 3 and a second heat dissipation mesh 7 located on the outer wall of the sensor body 4. After the sensor retracts, the heat dissipation meshes on both sides face each other. When the sensor generates heat during operation, the heat dissipation meshes can increase the heat dissipation area and accelerate heat dissipation. After the sensor retracts, the heat dissipation meshes of the protective tube 3 and the sensor body 4 face each other. When the sensor body 4 retracts, the two heat dissipation meshes are precisely aligned to form a through-cell honeycomb channel, which improves the heat dissipation efficiency by utilizing the chimney effect.

[0037] The usage process of this utility model is as follows:

[0038] The sensor body 4 is embedded within the protective tube 3, and the two are connected by a miniature electric push rod 2. The protective tube 3 has a wall thickness of 1.5mm, an outer polyvinyl chloride (PVC) protective layer 501 with a thickness of 0.8mm, a middle graphene shielding layer 502 with a thickness of 0.7mm, and an inner PP insulating layer 503 with a thickness of 0.5mm. A neodymium iron boron permanent magnet is embedded in the bottom of the mounting base 1, and four M4 mounting holes are opened on the side wall. A honeycomb heat dissipation mesh is formed around the protective tube 3, and the corresponding position of the sensor body 4 has the same interconnected heat dissipation mesh. When the electric push rod retracts the sensor, the heat dissipation meshes on both sides completely overlap, forming a through heat dissipation channel.

[0039] The advantages of this utility model are as follows:

[0040] This invention effectively resists external electromagnetic interference by setting a protective layer 501, a shielding layer 502, and an insulating layer 503 on the protective tube 3, protecting the sensor body 4 from electromagnetic influence and improving the measurement accuracy and stability of the sensor.

[0041] The heat dissipation structure corresponding to the protective tube 3 and the sensor body 4 can dissipate the heat generated during the operation of the sensor in a timely manner, reduce the temperature of the sensor, and extend the service life of the sensor.

[0042] The mounting structure and drive components on mounting base 1 make the installation and adjustment of the sensor more convenient and flexible, and the position of the sensor can be adjusted according to actual use needs to meet the requirements of different working conditions.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A sensor with electromagnetic interference protection, characterized in that, The device includes a protective tube and a sensor body slidably connected inside the protective tube. The protective tube is provided with a protective layer, a shielding layer and an insulating layer from the outside to the inside. It also includes a mounting base for mounting the protective tube and having a mounting structure. A driving component for driving the sensor body to slide is provided between the mounting base and the protective tube. The protective tube and the sensor body are also provided with heat dissipation structures for heat dissipation.

2. The sensor with electromagnetic interference protection according to claim 1, characterized in that, The driving component is a miniature electric push rod, the inner wall of the protective tube is provided with a guide groove, and the outer wall of the sensor body is provided with a sliding block that is slidably connected in the guide groove.

3. The sensor with electromagnetic interference protection according to claim 1, characterized in that, The shielding layer is a graphene coating or a polypyrrole coating, and the thickness of the coating is 0.5 mm to 1 mm.

4. The sensor with electromagnetic interference protection according to claim 1, characterized in that, The mounting structure is a permanent magnet located at the bottom of the mounting base, which has several mounting holes.

5. The sensor with electromagnetic interference protection according to claim 1, characterized in that, The protective layer is made of polyvinyl chloride.

6. The sensor with electromagnetic interference protection according to claim 1, characterized in that, The insulating layer is made of PP material.

7. The sensor with electromagnetic interference protection according to claim 1, characterized in that, The heat dissipation structures are heat dissipation meshes respectively installed on the outer wall of the protective tube and the sensor body. After the sensor is retracted, the heat dissipation meshes face each other.

Images