An electromagnetic shielding device for a sensor and a sensor with an electromagnetic shielding device.

Abstract

This utility model relates to the field of sensor technology, and more particularly to a sensor electromagnetic shielding device, which includes a conductive mounting bracket and a shielding cover. The shielding cover is mounted on the mounting bracket, and a cavity is provided inside the shielding cover, with both ends of the cavity penetrating through the shielding cover. The shielding cover is used to house a sensor assembly, and the mounting bracket is used to fix it to an external structure. A sensor with an electromagnetic shielding device is also provided. Compared with the prior art, the sensor electromagnetic shielding device and the sensor with an electromagnetic shielding device provided by this utility model can significantly improve the electromagnetic interference resistance of the sensor assembly and reduce replacement costs.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a sensor electromagnetic shielding device and a sensor with an electromagnetic shielding device. Background Technology

[0002] A sensor is a detection device that can sense the information being measured and transform that information into an electrical signal or other required form of output according to a certain rule, in order to meet the requirements of information transmission, processing, storage, display, recording, and control. Sensors can be divided into many different types, each corresponding to the detection of different physical quantities. With technological advancements, composite sensors have also emerged. Composite sensors integrate two or more detection elements with different functions, enabling the simultaneous detection of multiple physical quantities.

[0003] Sensors are used in rail transit vehicles to detect signals such as temperature and vibration. For example, sensors are installed in the locomotive running gear (running gear: refers to the complete set of devices in rail transit vehicles that supports the weight of the car body, guides the vehicle to travel along the track, bears and transmits various loads from the car body and the track, and mitigates their dynamic effects) to monitor the status. The sensors are generally equipped with temperature measuring elements (usually platinum resistance or thermocouple) and vibration and shock sensitive devices. After measuring the temperature and vibration and shock signals, the sensors transmit them to the on-board system through shielded cables.

[0004] However, sensors are susceptible to external electromagnetic interference during use, which can affect the stable transmission of signals. For example, the locomotive running gear includes bogies and a drive system. The drive system mainly consists of traction motors and gear transmission assemblies. When the motor is working, the interaction between the motor's frequency converter, motor cables, and the motor itself generates strong high-frequency electromagnetic interference. Furthermore, communication, control, and sensor systems, including the running gear condition monitoring sensor network (a system composed of distributed intelligent sensors and their adapters in the running gear that continuously senses, collects, and transmits health status and operational data of key components in the running gear), are sensitive to low-voltage signals. High-frequency electromagnetic interference will affect the signal transmission of the running gear monitoring sensor network, causing system misjudgments and affecting normal train operation.

[0005] Currently, to combat external electromagnetic interference to sensor signals, the common practice is to use shielded cables for signal transmission, which offer some protection against electromagnetic interference. However, current locomotive running gear condition monitoring sensor network systems lack continuous, loop-connected shielding and reliable grounding to enhance the Faraday cage effect, resulting in ineffective shielding against low frequencies and electrostatic discharge. Furthermore, with advancements in rail transit vehicle technology, electrical systems are becoming increasingly complex, leading to more interference sources and frequency bands. Traditional shielded cables are no longer adequate, resulting in severe electromagnetic interference in many current locomotive running gear sensor networks. This distorts running gear condition monitoring and health assessment, and can even directly impact operational safety. Utility Model Content

[0006] To address the problem that signals detected by sensors in existing technologies are easily affected by external electromagnetic interference, leading to signal data distortion, this invention provides a sensor electromagnetic shielding device. This device includes a mounting bracket and a shielding cover. The shielding cover has a cavity, allowing the sensor assembly to be housed within it. The shielding cover effectively blocks external electromagnetic energy, significantly improving the sensor assembly's electromagnetic interference resistance without requiring extensive replacement of sensors and adapter cables. This better ensures the authenticity and accuracy of the sensor signal data.

[0007] An electromagnetic shielding device for a sensor includes a conductive mounting bracket and a shielding cover. The shield is mounted on the mounting bracket, and the shield has a cavity inside, with both ends of the cavity penetrating through the shield. The shield is used to house the sensor assembly. The mounting bracket is used to fix it to the external structure.

[0008] Preferably, the shielding cover includes a first shielding cover and a second shielding cover; The first shielding cover is connected to one side of the mounting bracket and is used to cover the outside of the sensor; The second shield is connected to the other side of the mounting bracket and is used to cover the outside of the sensor adapter cable.

[0009] Preferably, the first shielding cover includes a first connecting seat and a first shielding mesh. The first connecting seat is connected to the mounting bracket, and the first shielding mesh is installed on the first connecting seat. The first connecting seat and the first shielding cover are used to cover the outside of the sensor. The second shielding cover includes a second connecting base and a second shielding mesh. The second connecting base is connected to the mounting bracket, and the second shielding mesh is installed on the second connecting base. The second connecting base and the second shielding cover are used to cover the outside of the sensor adapter cable.

[0010] Preferably, the first shielding mesh is fastened to the first connecting seat by a first loop connection device; The second shielding mesh is fastened to the second connecting seat by the second loop connection device.

[0011] Preferably, the outer peripheral surface of the first connecting seat is provided with a first annular groove, and the first ring-connecting device rings and fastens the first shielding mesh to the first annular groove. The outer peripheral surface of the second connector is provided with a second annular groove, and the second ring connection device rings and fastens the second shielding mesh to the second annular groove.

[0012] Preferably, the outer peripheral surface of the first connecting seat is provided with an outwardly protruding first boss, which is located at the tail of the first annular groove; The outer peripheral surface of the second connector is provided with an outwardly protruding second boss, which is located at the tail of the second annular groove.

[0013] Preferably, the first ring connection device is one of the following: metal cable tie, metal clamp, nylon cable tie, heat shrink tubing, and metal sheet; The second ring connection device uses one of the following: metal cable tie, metal clamp, nylon cable tie, heat shrink tubing, or metal sheet.

[0014] Preferably, the end faces of the first connecting seat and the second connecting seat respectively abut against the mounting bracket, and the first connecting seat and the second connecting seat are connected by a first fastener; The mounting bracket has a first through hole corresponding to the first fastener, through which the first fastener passes; the first connecting seat has a first mounting hole corresponding to the first fastener, and the second connecting seat has a second mounting hole corresponding to the first fastener, the first mounting hole or the second mounting hole is a threaded hole, and the first fastener is threadedly connected to the first connecting seat or the second connecting seat.

[0015] Preferably, the first connector has a through-hole cavity inside, the inner diameter of the first cavity near the mounting bracket is larger than the inner diameter away from the mounting bracket, and a first groove is formed in the cavity near the mounting bracket. The first connector is used to cover the outside of the sensor connector end.

[0016] Preferably, the second connector has a through second inner cavity, the inner diameter of the end of the second inner cavity near the mounting bracket is larger than the inner diameter of the end away from the mounting bracket, a second groove is formed in the inner cavity near the mounting bracket, and the depth of the second groove is greater than the sum of the flange thickness and the fastener height on the connector end of the sensor adapter cable, and the second connector is used to cover the outside of the connector end of the sensor adapter cable.

[0017] Preferably, the first shielding mesh is one of the following: anti-surge sleeve, metal wire mesh, conductive cloth, oriented metal wire mesh, metallized film, and metallized foil. The second shielding mesh is made of one of the following: anti-wave sleeve, metal wire mesh, conductive cloth, oriented metal wire mesh, metallized film, or metallized foil.

[0018] Preferably, the mounting bracket is used to install at the connection between the sensor and the sensor adapter cable, the mounting bracket has a second through hole at the center, and the mounting bracket has a mounting structure for installing the sensor adapter cable.

[0019] Preferably, the mounting structure is a threaded hole for mounting the adapter cable, and the sensor adapter cable can be mounted on the mounting bracket by bolts.

[0020] Preferably, the mounting bracket includes a first plate and a second plate bent from the end of the first plate. The second through hole is provided on the first plate. The first plate is used to install the shielding cover and the sensor adapter cable, and the second plate is used to connect with an external structure.

[0021] Preferably, the second plate is used for welding onto the external structure; Alternatively, the second plate may have mounting holes, and the second plate may be fixed to an external structure by fasteners.

[0022] A sensor with an electromagnetic shielding device, comprising a sensor assembly and a sensor electromagnetic shielding device as described in any of the preceding claims. The sensor assembly is built into the shielding cover.

[0023] Preferably, the sensor assembly includes a sensor and a sensor adapter cable connected to the sensor; The first shielding cover of the shielding cover is placed outside the sensor, and the second shielding cover of the shielding cover is placed outside the sensor adapter cable.

[0024] Preferably, the sensor includes a sensor probe end, a first connecting cable, and a sensor connector end arranged sequentially. The sensor adapter cable includes a first connector end, a second connecting cable, and a second connector end arranged in sequence.

[0025] Preferably, a flange is provided on the first connector end, and the flange is threadedly connected to the adapter wire mounting thread hole on the mounting bracket by a second fastener.

[0026] Compared with existing technologies, the sensor electromagnetic shielding device provided by this utility model includes a conductive mounting bracket and a shielding cover. The shielding cover is mounted on the mounting bracket, and a cavity is provided inside the shielding cover, with both ends of the cavity penetrating through the shielding cover. The shielding cover is used to house a sensor assembly, and the mounting bracket is used to fix it to an external structure. The shielding cover has the cavity penetrating through both ends, allowing the sensor assembly to be housed within the shielding cover. The shielding cover can block external electromagnetic energy, thereby improving the sensor assembly's anti-electromagnetic interference capability. Furthermore, the shielding cover is mounted on the conductive mounting bracket, so after the mounting bracket is connected to the external structure, the shielding cover can be connected to the external structure, enhancing the anti-electromagnetic interference capability by strengthening the Faraday cage effect. In addition, the sensor electromagnetic shielding device can significantly improve the anti-electromagnetic interference capability without requiring extensive replacement of sensors and adapter cables, and can also reduce replacement costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0028] Figure 1 This is a partial structural diagram of some components of a sensor with an electromagnetic shielding device provided in one embodiment. Figure 2 A schematic diagram of the disassembled structure of a sensor with an electromagnetic shielding device provided in one embodiment; Figure 3 for Figure 1 A three-dimensional structural diagram of the mounting bracket shown; Figure 4 for Figure 1 The diagram shows a three-dimensional structure of the sensor and the first shielding cover. Figure 5 for Figure 4 A schematic diagram of the exploded structure shown; Figure 6 for Figure 4A three-dimensional structural schematic diagram of the first connecting seat shown; Figure 7 for Figure 1 A three-dimensional structural diagram of the sensor adapter cable and the second shielding cover is shown. Explanation of reference numerals in the attached figures: Sensor 1000 with electromagnetic shielding device; The sensor electromagnetic shielding device 100, mounting bracket 40, first plate 41, adapter cable mounting threaded hole 411, first through hole 412, second plate 42, mounting hole 421, second through hole 43, shielding cover 50, first shielding cover 51, cavity 501, first connecting seat 511, first annular groove 5111, first boss 5112, first mounting hole 5113, first inner cavity 5114, first groove 5115, second shielding mesh 512, first ring connection device 513, second shielding cover 52, second connecting seat 521, second annular groove 5211, second boss 5212, second mounting hole 5213, second inner cavity 5214, second groove 5215, second shielding mesh 522, second ring connection device 523, second fastener 60, and first fastener 70; Sensor assembly 200, sensor 10, sensor probe end 11, first connecting cable 12, sensor connector end 13, sensor adapter cable 20, first connector end 21, flange 211, second connecting cable 22, second connector end 23. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that when a component is referred to as "mounted on", "fixed on", or "set on" another component, it can be directly on or indirectly set on another component; when a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to another component.

[0031] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0032] This invention provides a sensor electromagnetic shielding device, comprising a conductive mounting bracket and a shielding cover. The shielding cover is mounted on the mounting bracket, and has a cavity inside, with both ends of the cavity penetrating the shielding cover. The shielding cover is used to house a sensor assembly, and the mounting bracket is used to fix it to an external structure. The shielding cover has the cavity penetrating at both ends, allowing the sensor assembly to be housed within it. The shielding cover can block external electromagnetic energy, thereby improving the sensor assembly's electromagnetic interference resistance. Furthermore, the shielding cover is mounted on the conductive mounting bracket, so that after the mounting bracket is connected to the external structure, the shielding cover can be connected to the external structure, enhancing the electromagnetic interference resistance by strengthening the Faraday cage effect. In addition, this sensor electromagnetic shielding device can significantly improve electromagnetic interference resistance without requiring extensive replacement of sensors and adapter cables, and can also reduce replacement costs.

[0033] Please refer to the following: Figures 1 to 7 In one embodiment, a sensor electromagnetic shielding device 100 is provided, primarily used to improve the electromagnetic interference resistance of sensor components. Specifically, in one embodiment, the sensor electromagnetic shielding device 100 is an electromagnetic shielding implementation scheme for a locomotive running gear sensor cable network. Without extensively updating the original locomotive running gear sensor network, it enhances the sensor network's electromagnetic interference resistance by strengthening the Faraday cage effect, thereby improving the accuracy of running gear monitoring, ensuring locomotive operating safety, and simultaneously reducing upgrade and usage costs.

[0034] The sensor electromagnetic shielding device 100 includes a conductive mounting bracket 40 and a shielding cover 50. The sensor electromagnetic shielding device 100 is a continuous shielding body made of conductive or magnetically conductive materials, capable of absorbing, reflecting, and canceling electromagnetic energy, and blocking the entry of external electromagnetic energy. The conductive mounting bracket 40 is a mounting bracket made of a conductive material; for example, the mounting bracket 40 can be made of conductive or magnetically conductive materials, thus making the mounting bracket 40 conductive. The mounting bracket 40 is used to fix it to an external structure.

[0035] The shielding cover 50 is mounted on the mounting bracket 40. The shielding cover 50 has a cavity 501 inside, with both ends of the cavity 501 penetrating through it. The shielding cover 50 is used to house the sensor assembly 200. In other words, the shielding cover 50 has a cavity 501 with both ends open, allowing the sensor assembly 200 to pass through it. The cavity 501 can also accommodate components of the sensor assembly 200, thus protecting the sensor assembly 200 and improving its electromagnetic interference immunity.

[0036] Because the mounting bracket 40 is conductive, when it is connected to an external structure, the shielding cover 50 can be conductively connected to the external structure, achieving reliable grounding and enhancing the Faraday cage effect. For example, when the mounting bracket 40 is installed on a locomotive body, the shielding cover 50 can be conductively connected to the locomotive body, achieving reliable grounding. When the shielding cover 50 is placed over the sensor assembly 200, it can prevent external electromagnetic energy from entering the sensor adapter cable 20 and the sensor 10.

[0037] Understandably, to resist external electromagnetic interference to sensor signals, the common practice is to use shielded cables for signal transmission, which can resist electromagnetic interference to a certain extent. However, current locomotive running gear condition monitoring sensor network systems lack continuous, loop-connected shielding and reliable grounding to enhance the Faraday cage effect, resulting in ineffective shielding against low frequencies and electrostatic discharge. Furthermore, with advancements in rail transit vehicle technology, electrical systems are becoming increasingly complex, leading to more interference sources and frequency bands. Traditional shielded cables can no longer meet shielding requirements, resulting in severe electromagnetic interference in many current locomotive running gear sensor networks. This distorts running gear condition monitoring and health assessment, and can even directly impact operational safety.

[0038] The sensor electromagnetic shielding device 100 provided in this embodiment is equipped with a shielding cover 50, which can be placed over the sensor assembly to block external electromagnetic energy. Furthermore, because the mounting bracket 40 is conductive, the shielding cover 50 can be reliably grounded, allowing the sensor electromagnetic shielding device 100 to form a continuous and stable shield, thus providing better anti-electromagnetic interference capabilities. This better ensures the authenticity and accuracy of sensor signal data transmission and avoids signal data distortion. The sensor electromagnetic shielding device 100 effectively solves the problem of severe electromagnetic interference in many locomotive running gear sensor networks, which leads to distortion of running gear status monitoring and health assessment, and even directly affects driving safety. In addition, the sensor electromagnetic shielding device 100 can significantly improve anti-electromagnetic interference capabilities without requiring extensive replacement of sensors and adapter cables, and can also reduce replacement costs.

[0039] The mounting bracket 40 is mainly used to support and fix the shielding cover 50, ensuring the stability of the shielding cover 50's position and preventing it from swinging. The mounting bracket 40 also enables communication between the shielding cover 50 and the external structure. The mounting bracket 40 should balance conductivity and corrosion resistance to provide stable support and communication for the shielding cover 50. Specifically, in one embodiment, the mounting bracket 40 is a metal structural component.

[0040] To facilitate a more detailed description of some embodiments of the sensor electromagnetic shielding device 100, the structure of a sensor assembly 200 that can use the sensor electromagnetic shielding device 100 will be described below. Specifically, in one embodiment, the sensor assembly 200 may include a sensor 10 and a sensor adapter cable 20 connected to the sensor 10. The sensor 10 is a unit directly used to detect physical quantities. The tail end of the sensor 10 is connected to a cable and a connector. The sensor adapter cable 20 is a transmission cable structure for connecting to the sensor 10. The main function of the sensor adapter cable 20 is to transmit signal data.

[0041] Preferably, in one embodiment, the mounting bracket 40 is used to install at the connection between the sensor 10 and the sensor adapter cable 20. The mounting bracket 40 has a second through hole 43 at its center and a mounting structure for installing the sensor adapter cable. That is, in this embodiment, the mounting bracket 40 can also be used to install the sensor adapter cable 20, thereby better ensuring the accurate positioning of the sensor adapter cable 20 and the sensor 10, and ensuring the accurate relative position between the shielding cover 50 and the sensor 10 and sensor adapter cable 20, thus improving the anti-electromagnetic interference effect. The second through hole 43 avoids the sensor 10 and the sensor adapter cable 20, allowing for smooth connection between them.

[0042] Specifically, in one embodiment, the mounting structure on the mounting bracket 40 is a threaded hole 411 for the adapter cable, allowing the sensor adapter cable 20 to be bolted onto the mounting bracket 40. This structure reduces installation difficulty and improves the reliability of the connection between the sensor adapter cable 20 and the mounting bracket 40.

[0043] Preferably, in one embodiment, the mounting bracket 40 includes a first plate 41 and a second plate 42 bent from the end of the first plate 41. A second through hole 43 is disposed on the first plate 41. The first plate 41 is used to mount the shielding cover 50 and the sensor adapter cable 20, and the second plate 42 is used to connect to an external structure. The second plate 42 allows the mounting bracket 40 to achieve surface contact with the external structure, i.e., surface conductivity. Specifically, in one embodiment, the second plate 42 is used for connection and installation with the locomotive body.

[0044] Specifically, in one embodiment, the second plate 42 has a mounting hole 421, which is used to fix the second plate 42 to an external structure by fasteners. The mounting hole 421 can be a through hole, so that the second plate 42 can be threadedly connected to the external structure by bolts, for example, the second plate 42 can be fastened to the locomotive body by bolts. Of course, in other embodiments, the second plate 42 can also be fixed to the external structure by welding, and the mounting hole 421 can be retained or removed as needed.

[0045] Specifically, in one embodiment, the first plate 41 and the second plate 42 are perpendicular to each other, and the mounting bracket 40 is an "L"-shaped mounting bracket.

[0046] Specifically, in one embodiment, the adapter cable mounting threaded hole 411 is formed on the first plate 41.

[0047] Preferably, in one embodiment, the shielding cover 50 includes a first shielding cover 51 and a second shielding cover 52. The first shielding cover 51 is connected to one side of the mounting bracket 40 and is used to cover the outside of the sensor 10. The second shielding cover 52 is connected to the other side of the mounting bracket 40 and is used to cover the outside of the sensor adapter cable 20. That is, in this embodiment, the shielding cover 50 uses two covers to cover the sensor 10 and the sensor adapter cable 20 respectively. This structure facilitates the connection and installation of the shielding cover 50 and reduces the installation difficulty of the shielding cover 50.

[0048] Preferably, in one embodiment, the first shielding cover 51 includes a first connecting seat 511 and a first shielding mesh 512. The first connecting seat 511 is connected to the mounting bracket 40, and the first shielding mesh 512 is mounted on the first connecting seat 511. The first connecting seat 511 and the first shielding mesh 512 are used to cover the outside of the sensor 10. The first connecting seat 511 is the main component of the first shielding cover 51 used for connecting to the mounting bracket 40, and it also provides electrical conductivity between the first shielding mesh 512 and the mounting bracket 40. Simultaneously, the first connecting seat 511 also provides electromagnetic shielding protection for the sensor 10, while the first shielding mesh 512 is also used to cover the sensor 10 for electromagnetic shielding. This structure allows for a more stable and reliable connection between the first shielding cover 51 and the mounting bracket 40.

[0049] Preferably, in one embodiment, the second shielding cover 52 includes a second connecting seat 521 and a second shielding mesh 522. The second connecting seat 521 is connected to the mounting bracket 40, and the second shielding mesh 522 is mounted on the second connecting seat 521. The second connecting seat 521 and the second shielding mesh 522 are used to cover the outside of the sensor adapter cable 20. Similarly, the second connecting seat 521 is the main component of the second shielding cover 52 used for connecting with the mounting bracket 40, and the second connecting seat 521 can also conduct electricity between the second shielding mesh 522 and the mounting bracket 40. At the same time, the second connecting seat 521 can also provide electromagnetic shielding protection for the sensor adapter cable 20, and the second shielding mesh 522 is also a component used to cover the sensor adapter cable 20 for electromagnetic shielding. With this structure, the connection between the second shielding cover 52 and the mounting bracket 40 can be more stable and reliable.

[0050] Preferably, in one embodiment, the first shielding mesh 512 is fastened to the first connecting seat 511 by a first loop-connecting device 513. That is, in this embodiment, the first shielding mesh 512 is specifically fastened to the first connecting seat 511 by a loop-shaped connecting device (i.e., the first loop-connecting device 513). Using the first loop-connecting device 513 for loop-connection not only simplifies the connection structure and facilitates installation, but also makes the connection area between the first shielding mesh 512 and the first connecting seat 511 present an overall ring structure, increasing the connection area, achieving surface contact, and ensuring a stable and reliable connection between the first shielding mesh 512 and the first connecting seat 511.

[0051] Preferably, in one embodiment, the second shielding mesh 522 is fastened to the second connecting seat 521 by a second loop-connecting device 523. Similarly, in this embodiment, the second shielding mesh 522 is specifically fastened to the second connecting seat 521 by a loop-shaped connecting device (i.e., the second loop-connecting device 523). The connection structure is simple, easy to install, increases the connection area, achieves surface contact, and also makes the connection between the second shielding mesh 522 and the second connecting seat 521 stable and reliable.

[0052] Specifically, in one embodiment, a first annular groove 5111 is formed on the outer peripheral surface of the first connecting seat 511, and the first ring-connecting device 513 rings and fastens the first shielding mesh 512 to the first annular groove 5111. Specifically, the first shielding mesh 512 is sleeved on the first annular groove 5111 and ring-connected and fastened by the first ring-connecting device 513. This structure further improves the connection stability between the first shielding mesh 512 and the first connecting seat 511, achieving reliable conductive contact between the first shielding mesh 512 and the first connecting seat 511.

[0053] Specifically, in one embodiment, a second annular groove 5211 is formed on the outer peripheral surface of the second connecting seat 521, and the second ring-connecting device 523 rings and secures the second shielding mesh 522 to the second annular groove 5211. Specifically, the second shielding mesh 522 is sleeved on the second annular groove 5211 and secured by the second ring-connecting device 523. This structure further improves the connection stability between the second shielding mesh 522 and the second connecting seat 521, achieving reliable conductive contact between them.

[0054] Preferably, in one embodiment, the outer peripheral surface of the first connecting seat 511 is provided with an outwardly protruding first boss 5112, which is located at the tail end of the first annular groove 5111 (the end away from the mounting bracket 40). The first boss 5112 can prevent the first annular connecting device 513 from sliding or detaching, thereby reducing the possibility of the first shielding mesh 512 accidentally falling off.

[0055] Preferably, in one embodiment, the outer peripheral surface of the second connecting seat 521 is provided with an outwardly protruding second boss 5212, which is located at the tail end of the second annular groove 5211 (the end away from the mounting bracket 40). The provision of the second boss 5212 can prevent the second ring connecting device 523 from sliding or detaching, thereby reducing the possibility of the second shielding mesh 522 accidentally falling off.

[0056] Both the first loop-connecting device 513 and the second loop-connecting device 523 are fastening structures used to ensure that the shielding mesh and the connecting seat are looped together and that the shielding mesh does not fall off. Specifically, in one embodiment, the first loop-connecting device 513 includes, but is not limited to, metal cable ties, metal clamps, nylon cable ties, heat shrink tubing, metal sheet welding, and any other structure that can achieve a loop-connection and reliable connection between the first shielding mesh 512 and the first connecting seat 511. The second loop-connecting device 523 includes, but is not limited to, metal cable ties, metal clamps, nylon cable ties, heat shrink tubing, metal sheet welding, and any other structure that can achieve a loop-connection and reliable connection between the second shielding mesh 522 and the second connecting seat 521.

[0057] The first shielding mesh 512 and the second shielding mesh 522 include, but are not limited to, highly conductive and highly magnetically permeable metallic materials that can be used to shield electromagnetic interference and radio frequency interference, ensuring the normal operation of electronic equipment, data security, and preventing electromagnetic information leakage. Specifically, in one embodiment, the first shielding mesh 512 includes, but is not limited to, anti-surge sleeves, metal mesh, conductive cloth, oriented metal mesh, metallized films, and metallized foil. The second shielding mesh 522 includes, but is not limited to, anti-surge sleeves, metal mesh, conductive cloth, oriented metal mesh, metallized films, and metallized foil.

[0058] Specifically, in one embodiment, the first shielding mesh 512 is used to cover the outside of the connecting cable in the sensor 10, and both ends of the first shielding mesh 512 extend to the outside of the probe end and the connector end of the sensor. That is, the first shielding mesh 512 has a certain length, and when in use, it can more completely cover and protect the connecting cable of the sensor 10. The first shielding mesh 512 can start protecting the sensor 10 from the probe end and extend to the connector end of the sensor 10, thereby better preventing external electromagnetic interference to the sensor 10.

[0059] Specifically, in one embodiment, the second shielding mesh 522 is used to cover the outside of the connecting cable of the sensor adapter cable 22, and both ends of the second shielding mesh 522 extend to the outside of the connector ends of the sensor adapter cable 22. That is to say, the second shielding mesh 522 also has a certain length. When the second shielding mesh 522 is used, it can more completely cover and protect the connecting cable of the sensor adapter cable 22. The second shielding mesh 522 can start protecting the sensor adapter cable 22 from the connector end of one end of the sensor adapter cable 22 until it extends to the connector end of the other end of the sensor adapter cable 22, thereby better preventing external electromagnetic interference to the sensor adapter cable 22.

[0060] Preferably, in one embodiment, the end faces of the first connecting seat 511 and the second connecting seat 521 abut against the mounting bracket 40, thereby achieving surface contact, i.e., surface conductivity, and the first connecting seat 511 and the second connecting seat 521 are connected by a first fastener 70. The mounting bracket 40 is provided with a first through hole 412 corresponding to the first fastener 70, through which the first fastener 70 passes. The first connecting seat 511 is provided with a first mounting hole 5113 corresponding to the first fastener 70, and the second connecting seat 521 is provided with a second mounting hole 5213 corresponding to the first fastener 70. The first mounting hole 5113 or the second mounting hole 5213 is a threaded hole, and the first fastener 70 is threadedly connected to the first connecting seat 511 or the second connecting seat 521. This connection structure better ensures the positional reliability between the first connecting seat 511, the second connecting seat 521, and the mounting bracket 40.

[0061] Specifically, in one embodiment, the first fastener 70 is a bolt, the first mounting hole 5113 is a threaded hole, and the second mounting hole 5213 is a through hole. The head of the first fastener 70 abuts against the second connecting seat 521, and the shank of the first fastener 70 passes through the second mounting hole 5213 and the first through hole 412 before being threadedly connected to the first mounting hole 5113.

[0062] Specifically, in one embodiment, the first through hole 412 is disposed on the first plate 41.

[0063] Specifically, in one embodiment, four first fasteners 70 are provided, located at the four corners. Correspondingly, four first mounting holes 5113, four second mounting holes 5213, and four first through holes 412 are provided. The first connecting seat 511 and the second connecting seat 521 are fastened together by the four first fasteners 70, thereby further ensuring the reliability of the connection.

[0064] Preferably, in one embodiment, the first connecting seat 511 has a through-hole first inner cavity 5114. The inner diameter of the first inner cavity 5114 near the mounting bracket 40 is larger than the inner diameter away from the mounting bracket 40. A first groove 5115 is formed in the inner cavity near the mounting bracket 40. The first connecting seat 511 covers the outside of the sensor connector end 13. The first inner cavity 5114 is mainly for the sensor connector end 13 to pass through, while the first groove 5115 can surround the end of the sensor connector end 13 within the first connecting seat 511, so that the sensor 10 can be protected from the probe to the connector. More specifically, in one embodiment, both the first connecting seat 511 and the first shielding mesh 512 are made of metal, thereby protecting the sensor 10 within the metal.

[0065] Preferably, in one embodiment, the second connecting seat 521 has a through second inner cavity 5214. The inner diameter of the second inner cavity 5214 near the mounting bracket 40 is larger than the inner diameter away from the mounting bracket 40. A second groove 5215 is formed in the inner cavity near the mounting bracket 40, and the depth of the second groove 5215 is greater than the sum of the thickness of the flange 211 on the first connector end 21 of the sensor adapter cable 20 and the height of the fastener. The second connecting seat 521 is used to cover the outside of the first connector end 21. That is, in this embodiment, the depth of the second groove 5215 is greater than the sum of the heights of the flange 211 and the second fastener 60 (bolt) exposed outside the flange 211, so that the exposed parts of the flange 211 and the second fastener 60 can be completely accommodated in the second groove 5215. This provides better protection and avoids interference, allowing the second connecting seat 521 to stably abut against the mounting bracket 40. The second inner cavity 5214 is mainly for the cylindrical part of the first connector end 21 to pass through, while the second groove 5215 can surround the end of the first connector end 21 in the second connecting seat 521, so that the flange part of the first connector end 21 can be sunk in the second groove 5215, so that the sensor adapter cable 20 can be protected from the second connector end 23 to the first connector end 21. More specifically, in one embodiment, the second connecting seat 521 and the second shielding mesh 522 are both made of metal, so that the sensor adapter cable 20 can be protected in metal.

[0066] In one embodiment, the mounting bracket 40, the first connecting seat 511, the first shielding mesh 512, the first ring connection device 513, the second connecting seat 521, the second shielding mesh 522, the second ring connection device 523, and the fasteners, etc., can be adapted to the installation environment to ensure reliable connection and good conductivity between the components.

[0067] In one embodiment, the installation steps of the sensor electromagnetic shielding device 100 are as follows: 1. After completing the shielding installation of the sensor 10 and the sensor adapter cable 20 (when the sensor electromagnetic shielding device 100 needs to be installed on an existing sensor assembly (a sensor assembly already in use on the locomotive), the corresponding structure of the existing sensor assembly is disassembled from the locomotive), the mounting bracket 40 is installed on the locomotive body by welding or bolting, so that the mounting bracket 40 and the car body achieve surface contact, i.e., surface conduction. 2. The flange 211 on the sensor adapter cable 20 is installed on the mounting bracket 40 with screws, and the sensor connector end (circular connector) 13 is connected to the first connector end 21 from the other end of the mounting bracket 40. Third, approach the first connecting seat 511 and the second connecting seat 521 from both ends toward the mounting bracket 40. Use the first fastener 70 to pass through the second connecting seat 521 and the mounting bracket 40 in sequence, and then tighten the first fastener 70 onto the first mounting hole 5113 of the first connecting seat 511, ensuring reliable surface contact between the first connecting seat 511, the second connecting seat 521, and the mounting bracket 40. The first shielding mesh 512 has been pre-looped around the first connecting seat 511, and the second shielding mesh 522 has also been pre-looped around the second connecting seat 521. Therefore, after connecting the first connecting seat 511 and the second connecting seat 521, the sensor electromagnetic shielding device 100 is completely installed outside the sensor assembly 200.

[0068] The electromagnetic shielding device 100 for the sensors significantly improves the electromagnetic interference resistance of the locomotive running gear condition monitoring sensor network system without requiring extensive replacement of sensors and adapter cables, thereby enhancing the accuracy of running gear monitoring, ensuring locomotive driving safety, and reducing operating costs.

[0069] Meanwhile, in one embodiment, a sensor 1000 with an electromagnetic shielding device is also provided, which includes a sensor assembly 200 and the sensor electromagnetic shielding device 100. The sensor assembly 200 is built into the shielding cover 50, so that the sensor assembly 200 can be well protected by the shielding cover 50, and the electromagnetic interference resistance of the sensor assembly 200 can be improved.

[0070] Specifically, in one embodiment, the sensor assembly 200 includes a sensor 10 and a sensor adapter cable 20 connected to the sensor 10. The sensor 10 is a unit directly used to detect physical quantities, and its tail end is connected to a cable and a connector. The sensor adapter cable 20 is a transmission cable structure for connecting to the sensor 10, and its main function is to transmit signal data. A first shielding cover 51 is provided outside the sensor 10, and a second shielding cover 52 is provided outside the sensor adapter cable 20.

[0071] Specifically, in one embodiment, the sensor 10 includes a sensor probe end 11, a first connecting cable 12 and a sensor connector end 13 arranged in sequence, and the sensor adapter cable 20 includes a first connector end 21, a second connecting cable 22 and a second connector end 23 arranged in sequence, with the first connector end 21 mating with the sensor connector end 13.

[0072] Specifically, in one embodiment, the first shielding mesh 512 is disposed over the outside of the first connecting cable 12, and both ends of the first shielding mesh 512 extend to the outside of the sensor probe end 11 and the sensor connector end 13. That is, the first shielding mesh 512 protects the sensor 10 from the sensor probe end 11 to the sensor connector end 13, thus better preventing external electromagnetic interference to the sensor 10. Specifically, in one embodiment, the first connector 511 is disposed over the outside of the sensor connector end 13.

[0073] Specifically, in one embodiment, the second shielding mesh 522 is disposed over the outside of the second connecting cable 22, and both ends of the second shielding mesh 522 extend to the outside of the first connector end 21 and the second connector end 23. That is, the second shielding mesh 522 protects the sensor adapter cable 20 from the second connector end 23 to the first connector end 21, thus better preventing external electromagnetic interference to the sensor adapter cable 20. Specifically, in one embodiment, the second connector 521 is disposed over the outside of the first connector end 21.

[0074] Preferably, in one embodiment, a flange 211 is provided on the first connector end 21, and the flange 211 is mounted on the mounting bracket 40 by a second fastener 60. The mounting bracket 40 is provided with a threaded hole 411 for the adapter cable, and the second fastener 60 is threadedly connected to the threaded hole 411 for the adapter cable. Specifically, in one embodiment, the second fastener 60 is a bolt, and the flange 211 is provided with a through hole corresponding to the second fastener 60, the through hole for the threaded rod of the second fastener 60 to pass through. More preferably, in one embodiment, four second fasteners 60 are provided, and through holes are provided at the four corners of the flange 211. The mounting bracket 40 is provided with four threaded holes 411 for the adapter cable, and the flange 211 is mounted on the mounting bracket 40 by four second fasteners 60, thereby improving the stability of the connection.

[0075] Specifically, in one embodiment, the first connector end 21 is provided with a square flange 211, and the first connector end 21 can be referred to as the square connector end. The second connector end 23 adopts a circular structure as a whole, and the second connector end 23 can be referred to as the circular connector end.

[0076] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. An electromagnetic shielding device for a sensor, characterized in that, This includes conductive mounting brackets and shielding covers; The shield is mounted on the mounting bracket, and the shield has a cavity inside, with both ends of the cavity penetrating through the shield. The shield is used to house the sensor assembly. The mounting bracket is used to fix it to the external structure.

2. The sensor electromagnetic shielding device according to claim 1, characterized in that, The shielding cover includes a first shielding cover and a second shielding cover; The first shielding cover is connected to one side of the mounting bracket and is used to cover the outside of the sensor; The second shield is connected to the other side of the mounting bracket and is used to cover the outside of the sensor adapter cable.

3. The sensor electromagnetic shielding device according to claim 2, characterized in that, The first shielding cover includes a first connecting base and a first shielding mesh. The first connecting base is connected to the mounting bracket, and the first shielding mesh is installed on the first connecting base. The first connecting base and the first shielding cover are used to cover the outside of the sensor. The second shielding cover includes a second connecting base and a second shielding mesh. The second connecting base is connected to the mounting bracket, and the second shielding mesh is installed on the second connecting base. The second connecting base and the second shielding cover are used to cover the outside of the sensor adapter cable.

4. The sensor electromagnetic shielding device according to claim 3, characterized in that, The first shielding mesh is fastened to the first connecting seat by the first loop connection device; The second shielding mesh is fastened to the second connecting seat by the second loop connection device.

5. The sensor electromagnetic shielding device according to claim 4, characterized in that, The outer peripheral surface of the first connector is provided with a first annular groove, and the first ring connection device rings and fastens the first shielding mesh to the first annular groove. The outer peripheral surface of the second connector is provided with a second annular groove, and the second ring connection device rings and fastens the second shielding mesh to the second annular groove.

6. The sensor electromagnetic shielding device according to claim 5, characterized in that, The outer peripheral surface of the first connector is provided with an outwardly protruding first boss, which is located at the tail of the first annular groove. The outer peripheral surface of the second connector is provided with an outwardly protruding second boss, which is located at the tail of the second annular groove.

7. The sensor electromagnetic shielding device according to claim 4, characterized in that, The first ring connection device adopts one of the following: metal cable tie, metal clamp, nylon cable tie, heat shrink tubing, and metal sheet; The second ring connection device uses one of the following: metal cable tie, metal clamp, nylon cable tie, heat shrink tubing, or metal sheet.

8. The sensor electromagnetic shielding device according to claim 3, characterized in that, The end faces of the first connecting seat and the second connecting seat respectively abut against the mounting bracket, and the first connecting seat and the second connecting seat are connected by a first fastener; The mounting bracket has a first through hole corresponding to the first fastener, through which the first fastener passes; the first connecting seat has a first mounting hole corresponding to the first fastener, and the second connecting seat has a second mounting hole corresponding to the first fastener, the first mounting hole or the second mounting hole is a threaded hole, and the first fastener is threadedly connected to the first connecting seat or the second connecting seat.

9. The sensor electromagnetic shielding device according to claim 3, characterized in that, The first connector has a through-hole cavity inside. The inner diameter of the first cavity near the mounting bracket is larger than the inner diameter away from the mounting bracket. A first groove is formed in the cavity near the mounting bracket. The first connector is used to cover the outside of the sensor connector end.

10. The sensor electromagnetic shielding device according to claim 3, characterized in that, The second connector has a through second inner cavity. The inner diameter of the second inner cavity near the mounting bracket is larger than the inner diameter of the end away from the mounting bracket. A second groove is formed in the inner cavity near the mounting bracket. The depth of the second groove is greater than the sum of the flange thickness and the fastener height on the connector end of the sensor adapter cable. The second connector is used to cover the outside of the connector end of the sensor adapter cable.

11. The sensor electromagnetic shielding device according to claim 3, characterized in that, The first shielding mesh is made of one of the following: anti-surge sleeve, metal wire mesh, conductive cloth, oriented metal wire mesh, metallized film, and metallized foil. The second shielding mesh is made of one of the following: anti-wave sleeve, metal wire mesh, conductive cloth, oriented metal wire mesh, metallized film, or metallized foil.

12. The sensor electromagnetic shielding device according to claim 1, characterized in that, The mounting bracket is used to install at the connection between the sensor and the sensor adapter cable. The mounting bracket has a second through hole at its center and a mounting structure for installing the sensor adapter cable.

13. The sensor electromagnetic shielding device according to claim 12, characterized in that, The mounting structure has a threaded hole for mounting the adapter cable, and the sensor adapter cable can be mounted on the mounting bracket by bolts.

14. The sensor electromagnetic shielding device according to claim 12, characterized in that, The mounting bracket includes a first plate and a second plate bent from the end of the first plate. The second through hole is provided on the first plate. The first plate is used to install the shielding cover and the sensor adapter cable. The second plate is used to connect with an external structure.

15. The sensor electromagnetic shielding device according to claim 14, characterized in that, The second plate is used for welding onto the external structure; Alternatively, the second plate may have mounting holes, and the second plate may be fixed to an external structure by fasteners.

16. A sensor with an electromagnetic shielding device, characterized in that, Includes sensor components and a sensor electromagnetic shielding device as described in any one of claims 1 to 15; The sensor assembly is built into the shielding cover.

17. The sensor with electromagnetic shielding device according to claim 16, characterized in that, The sensor assembly includes a sensor and a sensor adapter cable connected to the sensor; The first shielding cover of the shielding cover is placed outside the sensor, and the second shielding cover of the shielding cover is placed outside the sensor adapter cable.

18. The sensor with electromagnetic shielding device according to claim 17, characterized in that, The sensor includes a sensor probe end, a first connecting cable, and a sensor connector end arranged sequentially. The sensor adapter cable includes a first connector end, a second connecting cable, and a second connector end arranged in sequence.

19. The sensor with electromagnetic shielding device according to claim 18, characterized in that, The first connector end is provided with a flange, and the flange is threadedly connected to the adapter wire mounting thread hole on the mounting bracket by a second fastener.

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