Protective device of non-contact current sensor

Abstract

The invention relates to the technical field of sensors, in particular to a protection device of a non-contact current sensor, which comprises a sealing assembly and a circulation assembly, the sealing assembly comprises a first layer piece, a retarding piece and a PCB, the first layer piece sequentially comprises a hydrophobic waterproof layer, a first hard anti-corrosion plastic layer, a first metal shielding layer, a second hard anti-corrosion plastic layer, a second metal shielding layer and a third hard anti-corrosion plastic layer from outside to inside, and the retarding piece comprises a first elastic layer and a second elastic layer. The PCB comprises a magnetic induction board, an operation circuit board and an energy recovery board; wherein the hydrophobic waterproof layer achieves waterproof blocking of the inner layer and the outer layer, the hard anti-corrosion plastic layer guarantees rigidity and corrosion resistance of the structure, the metal shielding layer resists electromagnetic interference, the elastic layer plays a role in damping and sealing, and the three types of PCBs have the magnetic induction detection function, the operation control function and the energy recovery function respectively. The ten-layer structure synergistically realizes waterproof, dustproof, anti-interference, damping and core function bearing, and provides basic guarantee for stable work of the sensor.

Description

Technical Field

[0001] This invention relates to the field of sensor technology, and in particular to a protective device for a non-contact current sensor. Background Technology

[0002] With the development of industrial automation and intelligence, current sensors are increasingly widely used in energy, power, and various industrial equipment. However, in harsh environments such as high humidity, high temperature, and dust, existing current sensors struggle to meet the high reliability and accuracy requirements for long-term stable operation. Their waterproof and dustproof performance is insufficient, and the commonly used enclosed structures and traditional heat dissipation designs result in poor heat dissipation. Furthermore, the cable center position of non-contact current sensors has a significant impact on measurement results and lacks precise positioning methods. Specifically, while the eddy current sensor in patent 202411924575.2 uses a dustproof plate and enclosed shell... While achieving waterproof and dustproof performance, the lack of an effective heat dissipation mechanism makes it prone to overheating at high temperatures, leading to insufficient stability. The Hall current sensor in patent 201910777675.X combines heat dissipation and cable positioning, but it suffers from defects such as large manual positioning errors, long oscillation time, and insufficient waterproof and dustproof protection. Although the waterproof and corrosion-resistant design in patent 202410993377.5 can block moisture and dust, it does not effectively solve the heat dissipation problem, and long-term use can easily lead to dust accumulation, affecting heat dissipation. Existing current sensors cannot simultaneously meet the requirements of waterproof, dustproof, heat dissipation, and cable positioning, making it difficult to operate stably for a long time in harsh environments. Summary of the Invention

[0003] In view of the above-mentioned problems of existing non-contact current sensors, such as insufficient waterproof and dustproof performance, low heat dissipation efficiency, low cable positioning accuracy, and poor overall structural reliability in harsh environments such as high temperature, high humidity, and dust, this invention is proposed.

[0004] Therefore, the purpose of this invention is to provide a protective device for a non-contact current sensor.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a protective device for a non-contact current sensor, comprising, The system includes a sealing assembly and a flow assembly. The sealing assembly comprises a first layer, a damping component, and a PCB board. The first layer, from the outside to the inside, consists of a hydrophobic and waterproof layer, a first rigid anti-corrosion plastic layer, a first metal shielding layer, a second rigid anti-corrosion plastic layer, a second metal shielding layer, and a third rigid anti-corrosion plastic layer. The damping component includes a first elastic layer and a second elastic layer. The PCB board includes a magnetic induction board, a computing circuit board, and an energy recovery board. The sealing assembly as a whole has a ten-layer structure from the outside to the inside, consisting of a hydrophobic and waterproof layer, a first rigid anti-corrosion plastic layer, a first metal shielding layer, a second rigid anti-corrosion plastic layer, a second metal shielding layer, a first elastic layer, a PCB board, a second elastic layer, a third rigid anti-corrosion plastic layer, and a hydrophobic and waterproof layer. Among them, the hydrophobic waterproof layer provides waterproof barrier between the inner and outer layers, the rigid anti-corrosion plastic layer ensures structural rigidity and corrosion resistance, the metal shielding layer resists electromagnetic interference, the elastic layer plays a role in shock absorption and sealing, and the three types of PCB boards respectively undertake the functions of magnetic induction detection, calculation control and energy recovery. The ten-layer structure works together to achieve waterproofing, dustproofing, anti-interference, shock absorption and core function support, providing a basic guarantee for the stable operation of the sensor.

[0006] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, wherein: the magnetic induction plate, the operational circuit board and the energy recovery plate of the PCB board are all concentric cylindrical in shape and connected, the operational circuit board is located between the magnetic induction plate and the energy recovery plate and there is a certain distance between them; the outer wall of the PCB board is bonded to the first elastic layer and the inner wall is bonded to the second elastic layer.

[0007] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, wherein: the magnetic induction plate and the energy recovery plate are inlaid with a magnetic induction sensor and a breathable membrane of the flow component, and the magnetic induction sensor and the breathable membrane are evenly distributed on the annular plate; the operational circuit board is inlaid with a breathable membrane, a fan, a first motor, a second motor, a third motor and a temperature sensor, the breathable membrane and the fan are evenly distributed on the annular plate, the first motor is located on the left side of the fan, and the second motor is located near the airflow channel of the flow component.

[0008] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, the hydrophobic component of the flow assembly includes a sloped plate, a main body shell, and a buckle. The sloped plate is made of rigid anti-corrosion plastic and has a hydrophobic coating on the outer layer. The sloped plate is connected and fixed to the main body shell by the buckle. The airflow channel of the flow assembly includes a rotating plate, a rotating shaft, a dustproof net, and a breathable mesh. The rotating plate is provided on the outermost side of the airflow channel. The rotating shaft of the rotating plate is connected to the output end of the second motor. The dustproof net is provided on the outer side of the breathable mesh.

[0009] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, wherein: in the control component of the flow assembly, the output end of the first motor is connected to the shaft of the fan, and can control the fan to rotate to achieve gas flow and heat dissipation; the output end of the second motor is connected to the shaft of the rotating plate, and can control the rotating plate to rotate to adjust the opening and closing degree of the airflow channel; a temperature sensor is set on the computing circuit board for monitoring the internal temperature of the device.

[0010] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, the temperature sensor of the flow component further optimizes the heat dissipation effect by adjusting the opening degree of the airflow channel through real-time monitoring of the internal temperature.

[0011] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, the fan speed of the circulation component can be automatically adjusted according to the working state of the current sensor. When the internal temperature of the device rises or the sensor load increases, the fan speed increases to improve heat dissipation efficiency.

[0012] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, the first motor, the second motor, and the third motor of the flow component are interconnected with the working state of the current sensor and can adjust the speed and action of the motors according to changes in temperature, humidity, vibration, etc. of the working environment to ensure the stability of the current sensor under different conditions; all electronic components are electrically isolated, and the airflow channel can be automatically adjusted by environmental sensors to maintain the device's optimal heat dissipation, dustproof performance, and electrical safety.

[0013] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, the sensor is provided with a positioning component, which includes a telescopic rod, a support plate, and a soft rubber pad. A spring is provided inside the telescopic rod. The soft rubber pad is located on the inner arc side of the support plate, and the telescopic rod is located on the outer arc side of the support plate. The extension and retraction of the spring of the telescopic rod is automatically controlled by a third motor on the computing circuit board to adjust the position of the cable and ensure that the cable is centered on the sensor.

[0014] As a preferred embodiment of the protective device for a non-contact current sensor of the present invention, the third motor is controlled by an electronic sensor installed on the positioning component that can automatically monitor the position of the cable, thereby making real-time fine adjustments to the position of the cable and ensuring the accuracy of the cable at the center of the sensor.

[0015] The advantages of this invention are as follows: The ten-layer composite structure in the sealing assembly significantly improves the sensor's environmental adaptability and long-term durability, effectively blocking moisture, corrosive media, dust intrusion, and electromagnetic interference, making it particularly suitable for highly corrosive and high-humidity environments such as coastal areas, chemical plants, and mines. The intelligent, tiered heat dissipation strategy, constructed using a temperature sensor, a temperature-controlled rotating plate, and an automatically adjustable fan in the flow assembly, combined with a dustproof mesh and breathable membrane within the airflow channel, achieves efficient gas flow and heat dissipation while preventing dust infiltration, achieving an optimal balance between efficient heat dissipation and dust prevention, thus avoiding performance degradation caused by dust accumulation or overheating in traditional sensors. The spring-loaded telescopic rod in the positioning assembly further enhances the sensor's performance. The device features a support plate and soft rubber pads, along with electronic sensors to detect cable position in real time. A third motor drives a telescopic rod for dynamic fine-tuning, effectively suppressing cable misalignment caused by mechanical vibration and thermal deformation, ensuring high-precision detection during long-term operation. The entire device integrates sealing, flow, and positioning components, with each component achieving intelligent control through motor and sensor linkage. Users do not need frequent debugging or maintenance, significantly reducing operating costs and failure rates. Furthermore, all electronic components adopt an electrical isolation design, and multiple metal shielding layers further enhance electromagnetic compatibility, effectively suppressing external electromagnetic interference, ensuring signal purity and operational safety, and ensuring long-term stable and reliable operation of the sensor in harsh environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic cross-sectional view of the protective device for a non-contact current sensor.

[0018] Figure 2 This is a schematic cross-sectional view of the sealing components of a protective device for a non-contact current sensor.

[0019] Figure 3 This is a schematic cross-sectional view of the hydrophobic component and airflow channel of a protective device for a non-contact current sensor.

[0020] Figure 4 This is a schematic diagram of the PCB layout for a protective device of a non-contact current sensor.

[0021] Figure 5 A schematic diagram of the control component of a protection device for a non-contact current sensor on a PCB board. Figure 1 .

[0022] Figure 6A schematic diagram of the control component of a protection device for a non-contact current sensor on a PCB board. Figure 2 .

[0023] Figure 7 A schematic diagram of the control component of a protection device for a non-contact current sensor on a PCB board. Figure 3 .

[0024] Reference numerals: 1. Sealing component; 11. First layer; 111. Hydrophobic and waterproof layer; 112. First rigid anti-corrosion plastic layer; 113. First metal shielding layer; 114. Second rigid anti-corrosion plastic layer; 115. Second metal shielding layer; 116. Third rigid anti-corrosion plastic layer; 12. Moisture-reducing component; 121. First elastic layer; 122. Second elastic layer; 13. PCB board; 131. Magnetic induction board; 132. Operational circuit board; 133. Energy recovery board; 2. Flow component; 21. Hydrophobic Components; 211. Slope plate; 212. Main body shell; 213. Buckle; 22. Airflow channel; 221. Rotating plate; 222. Rotating shaft; 223. Dustproof net; 224. Breathable mesh; 23. Control component; 231. Magnetic induction sensor; 232. Breathable membrane; 233. Fan; 234. First motor; 235. Second motor; 236. Third motor; 237. Temperature sensor; 3. Positioning assembly; 31. Telescopic rod; 32. Support plate; 33. Soft rubber pad; 311. Spring. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include the three-dimensional spatial dimensions of length, width, and depth.

[0029] Example Reference Figure 1 - Figure 7 As an embodiment of the present invention, a protective device for a non-contact current sensor is provided. This device includes a sealing assembly 1 and a flow assembly 2. The sealing assembly 1 includes a first layer 11, a buffer 12, and a PCB board 13. The first layer 11 consists of, from the outside to the inside, a hydrophobic and waterproof layer 111, a first rigid anti-corrosion plastic layer 112, a first metal shielding layer 113, a second rigid anti-corrosion plastic layer 114, a second metal shielding layer 115, and a third rigid anti-corrosion plastic layer 116. The buffer 12 includes a first elastic layer 1... 21 and the second elastic layer 122, the PCB board 13 includes a magnetic induction board 131, a computing circuit board 132 and an energy recovery board 133; the sealing assembly 1 has a ten-layer structure from the outside to the inside, which are, in sequence, a hydrophobic and waterproof layer 111, a first rigid anti-corrosion plastic layer 112, a first metal shielding layer 113, a second rigid anti-corrosion plastic layer 114, a second metal shielding layer 115, a first elastic layer 121, a PCB board 13, a second elastic layer 122, a third rigid anti-corrosion plastic layer 116, and a hydrophobic and waterproof layer 111; Among them, the hydrophobic and waterproof layer 111 achieves waterproof barrier between the inner and outer layers, the rigid anti-corrosion plastic layer ensures structural rigidity and corrosion resistance, the metal shielding layer resists electromagnetic interference, the elastic layer plays a role in shock absorption and sealing, and the three types of boards of PCB board 13 respectively undertake the functions of magnetic induction detection, calculation control and energy recovery. The ten-layer structure works together to achieve waterproof and dustproof, anti-interference, shock absorption and core function support, providing a basic guarantee for the stable operation of the sensor.

[0030] Among them, the magnetic induction plate 131, the computing circuit board 132 and the energy recovery plate 133 of the PCB board 13 are all concentric cylindrical in shape and connected. The computing circuit board 132 is located between the magnetic induction plate 131 and the energy recovery plate 133 and there is a certain distance between them. The outer wall of the PCB board 13 is attached to the first elastic layer 121 and the inner wall is attached to the second elastic layer 122.

[0031] Specifically, the magnetic induction plate 131 and the energy recovery plate 133 are inlaid with the magnetic induction sensor 231 and the breathable membrane 232 of the flow component 2, and the magnetic induction sensor 231 and the breathable membrane 232 are evenly distributed on the annular plate; the computing circuit board 132 is inlaid with the breathable membrane 232, the fan 233, the first motor 234, the second motor 235, the third motor 236 and the temperature sensor 237, the breathable membrane 232 and the fan 233 are evenly distributed on the annular plate, the first motor 234 is located on the left side of the fan 233, and the second motor 235 is located near the airflow channel 22 of the flow component 2; The hydrophobic and waterproof layer 111 is made of fluorocarbon polymer coating with a thickness of approximately 0.5 mm. It has self-healing properties and can automatically restore its integrity after minor scratches. The first rigid anti-corrosion plastic layer 112 is made of polyetheretherketone (PEEK) material with a thickness of 1 mm, which has high mechanical strength and chemical corrosion resistance. The first metal shielding layer 113 is made of permalloy sheet with a thickness of 0.3 mm for electromagnetic shielding. The second rigid anti-corrosion plastic layer 114 is made of the same material as the first rigid layer, further enhancing the structural rigidity. The second metal shielding layer 115 is made of the same material as the first metal shielding layer 113, forming a double-layer electromagnetic shielding structure. The first elastic layer... Layer 121 is made of silicone rubber with a thickness of 2mm and is used for shock absorption and sealing. The PCB board 13 includes a magnetic induction board 131, a computing circuit board 132, and an energy recovery board 133. The boards are electrically interconnected through flexible connectors. The second elastic layer 122 is made of the same material as the first elastic layer 121 and wraps and buffers the internal PCB board 13. The third rigid anti-corrosion plastic layer 116 serves as an inner lining structure to maintain the overall shape. The innermost hydrophobic and waterproof layer 111 is sprayed with polyurethane waterproof paint to achieve the innermost sealing protection. The layers are formed by hot-pressing composite process, and the overall structure has good toughness and environmental isolation performance.

[0032] Furthermore, the hydrophobic component 21 of the flow assembly 2 includes a sloped plate 211, a main body shell 212, and a buckle 213. The sloped plate 211 is made of hard anti-corrosion plastic and has a hydrophobic coating on the outer layer. The sloped plate 211 and the main body shell 212 are connected and fixed by the buckle 213. The airflow channel 22 of the flow assembly 2 includes a rotating plate 221, a rotating shaft 222, a dustproof net 223, and a breathable mesh 224. The rotating plate 221 is provided on the outermost side of the airflow channel 22. The rotating shaft 222 of the rotating plate 221 is connected to the output end of the second motor 235. The dustproof net 223 is provided on the outer side of the breathable mesh 224. The drainage component 21 consists of a sloped plate 211, a main body shell 212, and a buckle 213. The sloped plate 211 is located on the left and right sides of the main body shell 212 and is connected and fixed by the buckle 213. The sloped plate 211 serves to drain water and prevent water from flowing into the airflow channel 22. The main body shell 212 serves to connect with the sloped plate 211 and protect the internal structure. The buckle 213 serves to connect the sloped plate 211 and the main body shell 212, and the sloped plate 211 can be replaced.

[0033] Furthermore, in the control component 23 of the circulation component 2, the output end of the first motor 234 is connected to the rotating shaft 222 of the fan 233, which can control the fan 233 to rotate to achieve gas circulation and heat dissipation; the output end of the second motor 235 is connected to the rotating shaft 222 of the rotating plate 221, which can control the rotating plate 221 to rotate to adjust the opening and closing degree of the airflow channel 22; the temperature sensor 237 is set on the computing circuit board 132 to monitor the internal temperature of the device.

[0034] Furthermore, the temperature sensor 237 of the circulation component 2, by detecting the internal temperature in real time, adjusts the opening degree of the airflow channel 22 to further optimize the heat dissipation effect.

[0035] Among them, the fan 233 of the circulation component 2 can automatically adjust its speed according to the working status of the current sensor. When the internal temperature of the device rises or the sensor load increases, the fan 233 speed increases to improve heat dissipation efficiency.

[0036] Furthermore, the first motor 234, the second motor 235, and the third motor 236 of the flow component 2 are interconnected with the working state of the current sensor. They can adjust the speed and action of the motors according to changes in the temperature, humidity, vibration, etc. of the working environment to ensure the stability of the current sensor under different conditions. All electronic components are electrically isolated, and the airflow channel 22 can be automatically adjusted by the environmental sensor to maintain the device's optimal heat dissipation, dustproof performance, and electrical safety. The airflow channel 2224 is located inside the sensor housing and runs through three types of PCB boards 13. The breathable membranes 232, made of ePTFE material, are embedded in the magnetic induction plate 131 and the energy recovery plate 133, with six breathable membrane units evenly distributed on each plate. Four miniature brushless fans 233 are embedded in the computing circuit board 132 and are evenly distributed circumferentially. The fan shaft 222 is connected to the output of the first motor 234, allowing for speed adjustment. A temperature sensor 237 is attached to the inner wall of the computing circuit board 132 to monitor the internal temperature in real time and transmit the signal to the control unit. A rotating plate 221 is located on the outermost side of the airflow channel 22, and its shaft 222 is connected to the output of the second motor 235. The second motor 235 controls the opening and closing angle of the rotating plate 221 based on the feedback signal from the temperature sensor 237, thereby adjusting the cross-sectional area of ​​the airflow channel 22 and achieving intelligent control of heat dissipation intensity.

[0037] Furthermore, the sensor is equipped with a positioning component 3, which includes a telescopic rod 31, a support plate 32, and a soft rubber pad 33. A spring 311 is installed inside the telescopic rod 31. The soft rubber pad 33 is located on the inner arc side of the support plate 32, and the telescopic rod 31 is located on the outer arc side of the support plate 32. The extension and retraction of the spring 311 of the telescopic rod 31 is automatically controlled by a third motor 236 on the computing circuit board 132 to adjust the position of the cable and ensure that the cable is centered on the sensor.

[0038] Furthermore, the third motor 236 is controlled by an electronic sensor installed on the positioning component 3 that can automatically monitor the position of the cable, and the position of the cable is finely adjusted in real time to ensure the accuracy of the cable in the center of the sensor. Four identical positioning components 3 are evenly distributed circumferentially within the sensor cavity. Each positioning component 3 includes a telescopic rod 31, a support plate 32, and a position sensor. The telescopic rod 31 contains a spring 311 and a lead screw transmission mechanism. The third motor 236 drives the lead screw to achieve radial movement of the positioning component 3. The support plate 32 is an arc-shaped aluminum alloy part with a soft rubber pad 33 made of fluororubber attached to its inner arc surface. This pad provides friction when clamping the cable and prevents damage to the cable surface. The position sensor is embedded inside the support plate 32 and is used to detect the offset between the cable and the center of the sensor in real time. The control unit receives the position sensor signal, generates control commands through a PID algorithm, and drives the third motor 236 to rotate, thereby achieving dynamic fine-tuning of the cable position and ensuring that the cable is always at the geometric center of the sensor.

[0039] During operation, basic protection is first achieved through the ten-layer composite structure of the sealing component 1. The outer hydrophobic and waterproof layer 111 is coated with a fluorocarbon polymer coating, and the inner hydrophobic and waterproof layer 111 is sprayed with polyurethane waterproof paint, which together block moisture from the inside and outside. The first, second, and third rigid anti-corrosion plastic layers 116 ensure structural rigidity and corrosion resistance. The first and second metal shielding layers 115 form a double-layer electromagnetic shield to resist interference. The first and second elastic layers 122 achieve shock absorption and sealing. Each layer is hot-pressed and composite molded. At the same time, the magnetic induction board 131, the computing circuit board 132, and the energy recovery board 133 of the PCB board 13 respectively bear the magnetic... The sensor's sensing, detection, operation control, and energy recovery functions provide a foundation for stable operation. Regarding the flow component 2, the inclined plates 211 on both sides prevent water from flowing into the airflow channel 22. The airflow channel 22 connects to three types of PCB boards 13. The outer rotating plate 221 is controlled by a second motor 235 to adjust the opening and closing angle of the rotating shaft 222. The inner side is sequentially equipped with a dustproof mesh 223 and a breathable mesh 224. The operation circuit board 132 also has four circumferentially evenly distributed miniature brushless fans 233 and a temperature sensor 237 embedded in it. The miniature brushless fans 233 are controlled by a first motor 234 to adjust their rotation speed and temperature. The temperature sensor 237 monitors the internal temperature in real time and transmits the signal to the control unit. Based on the temperature, the control unit controls the first motor 234 to adjust the fan 233 speed and controls the second motor 235 to adjust the opening angle of the rotating plate 221 to optimize heat dissipation. Simultaneously, the first, second, and third motors 236 are linked to the sensor's operating status and can adjust their actions according to ambient temperature, humidity, and vibration. All electronic components are electrically isolated. The airflow channel 22 is automatically adjusted by an environmental sensor to maintain heat dissipation and dustproof performance. Regarding the positioning components 3, four identical positioning components 3 are evenly distributed circumferentially within the sensor cavity. Each positioning component 3 is supported by… Fluororubber soft pads 33 are attached to the inner arc side of the support plate 32 to prevent damage and provide friction when clamping the cable. The outer arc side is connected to the telescopic rod 31 with spring 311 and screw drive mechanism. The position sensor inside the support plate 32 detects the offset of the cable from the center in real time. After receiving the signal, the control unit generates instructions through PID algorithm to drive the third motor 236 to drive the screw to move the telescopic rod 31 radially, so as to dynamically fine adjust the position of the cable and ensure that the cable is always at the geometric center of the sensor. The whole device achieves waterproof and dustproof, heat dissipation, precise positioning and anti-interference under the coordinated action of each component, ensuring stable operation of the sensor. After the sensor is powered on, it operates according to the following procedure: (1) Initial state: Each motor is in standby state, the fan 233 runs at low speed, the rotating plate 221 opens at an angle of 30%, and the positioning component 3 is in the center position. (2) Temperature monitoring and heat dissipation regulation: Temperature sensor 237 monitors the internal temperature in real time. When the temperature is below 40℃, the system maintains the initial state; when the temperature reaches 40℃ (first threshold), the first motor 234 increases the speed of fan 233 to enhance forced air cooling; when the temperature reaches 55℃ (second threshold), the second motor 235 operates to open the rotating plate 221 to the maximum angle (90%) to achieve maximum airflow heat dissipation; at the same time, if the temperature continues to rise to 70℃ (third threshold), the control unit issues an overheat alarm signal and can link with the upper-level system to reduce the measurement current; (3) Cable position calibration: The position sensor monitors the cable position in real time. If the cable is detected to be deviated from the center by more than 0.5mm, the control unit starts the third motor 236 to drive the corresponding positioning component 3 to move and reposition the cable to the center area within 3 seconds. (4) Waterproof and dustproof: The multi-layer composite structure effectively isolates external moisture and dust throughout the entire working process. Even in rainy or dusty environments, the internal PCB board 13 can remain dry and clean, ensuring measurement accuracy.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A protective device for a non-contact current sensor, characterized in that: include, The assembly includes a sealing component (1) and a flow component (2); the sealing component (1) comprises a first layer (11), a buffer (12), and a PCB board (13). The first layer (11) consists of, from the outside to the inside, a hydrophobic and waterproof layer (111), a first rigid anti-corrosion plastic layer (112), a first metal shielding layer (113), a second rigid anti-corrosion plastic layer (114), a second metal shielding layer (115), and a third rigid anti-corrosion plastic layer (116). The buffer (12) comprises a first elastic layer (121) and a second elastic layer (122). Board B (13) includes a magnetic induction board (131), a computing circuit board (132) and an energy recovery board (133); the sealing assembly (1) has a ten-layer structure from the outside to the inside, namely, a hydrophobic and waterproof layer (111), a first rigid anti-corrosion plastic layer (112), a first metal shielding layer (113), a second rigid anti-corrosion plastic layer (114), a second metal shielding layer (115), a first elastic layer (121), a PCB board (13), a second elastic layer (122), a third rigid anti-corrosion plastic layer (116), and a hydrophobic and waterproof layer (111). Among them, the hydrophobic waterproof layer (111) achieves waterproof barrier between the inner and outer layers, the rigid anti-corrosion plastic layer ensures structural rigidity and corrosion resistance, the metal shielding layer resists electromagnetic interference, the elastic layer plays a role in shock absorption and sealing, and the three types of boards of the PCB board (13) respectively undertake the functions of magnetic induction detection, calculation control and energy recovery. The ten-layer structure works together to achieve waterproof and dustproof, anti-interference, shock absorption and core function support, providing a basic guarantee for the stable operation of the sensor.

2. The protective device for the non-contact current sensor as described in claim 1, characterized in that: The magnetic induction plate (131), the computing circuit board (132) and the energy recovery plate (133) of the PCB board (13) are all concentric cylindrical and connected. The computing circuit board (132) is located between the magnetic induction plate (131) and the energy recovery plate (133) and there is a certain distance between them. The outer wall of the PCB board (13) is attached to the first elastic layer (121) and the inner wall is attached to the second elastic layer (122).

3. The protective device for the non-contact current sensor as described in claim 2, characterized in that: The magnetic induction plate (131) and the energy recovery plate (133) are inlaid with magnetic induction sensors (231) and breathable membranes (232) of the flow component (2), and the magnetic induction sensors (231) and breathable membranes (232) are evenly distributed on the annular plate; the operation circuit board (132) is inlaid with breathable membranes (232), fans (233), first motors (234), second motors (235), third motors (236) and temperature sensors (237), the breathable membranes (232) and fans (233) are evenly distributed on the annular plate, the first motor (234) is located on the left side of the fans (233), and the second motor (235) is located near the airflow channel (22) of the flow component (2).

4. The protective device for the non-contact current sensor as described in claim 3, characterized in that: The hydrophobic component (21) of the flow component (2) includes a slope plate (211), a main body shell (212) and a buckle (213). The slope plate (211) is made of hard anti-corrosion plastic and has a hydrophobic coating on the outer layer. The slope plate (211) and the main body shell (212) are connected and fixed by the buckle (213). The airflow channel (22) of the flow component (2) includes a rotating plate (221), a rotating shaft (222), a dustproof net (223) and a breathable mesh (224). The rotating plate (221) is provided on the outermost side of the airflow channel (22). The rotating shaft (222) of the rotating plate (221) is connected to the output end of the second motor (235). The dustproof net (223) is provided on the outer side of the breathable mesh (224).

5. The protective device for the non-contact current sensor as described in claim 4, characterized in that: In the control component (23) of the circulation component (2), the output end of the first motor (234) is connected to the shaft of the fan (233), which can control the fan (233) to rotate to achieve gas circulation and heat dissipation; the output end of the second motor (235) is connected to the shaft (222) of the rotating plate (221), which can control the rotating plate (221) to rotate to adjust the opening and closing degree of the airflow channel (22); the temperature sensor (237) is set on the computing circuit board (132) to monitor the internal temperature of the device.

6. The protective device for the non-contact current sensor as described in claim 5, characterized in that: The temperature sensor (237) of the circulation component (2) adjusts the opening degree of the airflow channel (22) by monitoring the internal temperature in real time, thereby further optimizing the heat dissipation effect.

7. The protective device for the non-contact current sensor as described in claim 6, characterized in that: The fan (233) speed of the circulation component (2) can be automatically adjusted according to the working state of the current sensor. When the internal temperature of the device rises or the sensor load increases, the fan (233) speed increases to improve heat dissipation efficiency.

8. The protective device for the non-contact current sensor as described in claim 7, characterized in that: The first motor (234), second motor (235) and third motor (236) of the circulation component (2) are interconnected with the working state of the current sensor. They can adjust the speed and action of the motor according to changes in temperature, humidity, vibration and other factors in the working environment to ensure the stability of the current sensor under different conditions. All electronic components are electrically isolated. The airflow channel (22) can be automatically adjusted by the environmental sensor to maintain the best heat dissipation, dustproof performance and electrical safety of the device.

9. The protective device for the non-contact current sensor as described in claim 7 or 8, characterized in that: The sensor is equipped with a positioning component (3), which includes a telescopic rod (31), a support plate (32), and a soft rubber pad (33). A spring (311) is installed inside the telescopic rod (31). The soft rubber pad (33) is located on the inner arc side of the support plate (32), and the telescopic rod (31) is located on the outer arc side of the support plate (32). The extension and retraction of the spring (311) of the telescopic rod (31) is automatically controlled by a third motor (236) on the computing circuit board (132) to adjust the position of the cable and ensure that the cable is in the center of the sensor.

10. The protective device for the non-contact current sensor as described in claim 9, characterized in that: The third motor (236) controls the movement of the third motor (236) by installing an electronic sensor on the positioning component (3) that can automatically monitor the position of the cable, and makes real-time fine adjustments to the position of the cable to ensure the accuracy of the cable at the center of the sensor.

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