Displacement sensor

Abstract

This utility model discloses a displacement sensor, relating to the field of displacement sensor technology. The displacement sensor includes an electronic chamber, a circuit board support, and a sealing element. The electronic chamber houses a sensitive element and an electronic board. The circuit board support includes a connecting part and a support body disposed within the electronic chamber. The connecting part is connected to the support body and the inner wall of the electronic chamber. The support body is connected to both the electronic board and the sensitive element. The sealing element covers the electronic chamber. This structural design achieves stable fixation of the electronic board and the sensitive element on the circuit board support, ensuring the reliability of their electrical connection and signal transmission. This design effectively reduces the impact of vibration on the components, thereby improving the sensor's measurement accuracy and stability. By optimizing the internal structure of the electronic chamber, the poor vibration damping effect of traditional sealing methods is solved, significantly improving the measurement performance and reliability of the displacement sensor.

Description

Technical Field

[0001] This utility model relates to the field of displacement sensor technology, and in particular to a displacement sensor. Background Technology

[0002] Magnetostrictive displacement sensors are high-precision measuring devices based on the magnetostrictive effect, widely used in industrial automation, precision measurement, and displacement control. Their core principle is the magnetostrictive effect, the phenomenon of ferromagnetic materials changing size under the influence of an applied magnetic field. These displacement sensors typically include components such as an electronic housing and a sensing element. The electronic housing is a crucial component, primarily used to protect the internal circuitry. The sensing element is the part of the displacement sensor that directly senses the measured quantity; elastic wave signals are generated and propagated through waveguide wires within the sensing element.

[0003] In related technologies, the electronic chamber is often sealed with sealant to directly enclose the electronic board and sensitive components, thereby effectively shielding them from external interference signals. However, this method results in poor shock absorption within the electronic chamber, leading to problems such as decreased measurement accuracy, signal instability, and shortened component lifespan for displacement sensors, which is detrimental to their stable use. Utility Model Content

[0004] The main purpose of this invention is to propose a displacement sensor that aims to solve the technical problems of decreased measurement accuracy and unstable signal in displacement sensors in related technologies.

[0005] To achieve the above objectives, this utility model proposes a displacement sensor, which includes:

[0006] An electronic compartment, which contains sensitive components and electronic boards;

[0007] A circuit board support includes a connecting part and a support body disposed within the electronic compartment. The connecting part is connected to the support body and to the inner wall of the electronic compartment. The support body is connected to the electronic board and the sensitive element, respectively.

[0008] A sealing element that covers the electronic compartment.

[0009] In one embodiment, the bracket body includes two connecting sections and a protruding section. The protruding section protrudes from the two connecting sections and each of the two connecting sections is provided with a connecting portion. The protruding section and the side ends of the two connecting sections respectively form a limiting groove, and the sensitive element is limited within the limiting groove.

[0010] In one embodiment, the bracket body further includes a first annular frame and a second annular frame that are detachably connected. The connecting portion includes two first protrusions and two second protrusions. The two first protrusions are disposed on the inner side of the first annular frame and are arranged opposite each other to form a first space for limiting the electronic board. The two second protrusions are disposed on the inner side of the second annular frame and are arranged opposite each other to form a second space for limiting the electronic board. Each first protrusion has a first through hole penetrating the first protrusion, and each second protrusion has a second through hole penetrating the second protrusion.

[0011] In one embodiment, a plurality of protrusions are spaced apart on one side of the second annular frame, the protrusions being configured to engage with the electronic compartment.

[0012] In one embodiment, the first annular frame is further provided with a first shock-absorbing hole, which extends circumferentially along the first annular frame; the second annular frame is further provided with a second shock-absorbing hole, which extends circumferentially along the second annular frame.

[0013] In one embodiment, the electronic compartment includes a housing and at least one sealing layer, each of the sealing layers being disposed on the outer periphery of the housing.

[0014] In one embodiment, the displacement sensor further includes a tail cover assembly, which includes a tail cover body, a sealing sleeve, a clamping pin, and a cable. The cable passes through the tail cover body, the sealing sleeve is fitted around the cable, and the tail cover body is connected to the clamping pin. The circuit board is electrically connected to the cable.

[0015] In one embodiment, the displacement sensor further includes a probe assembly, which includes a probe body and an end cap connected together. The probe body is connected to one end of the electronic compartment, and the end cap is disposed at one end of the probe body. The electronic compartment is connected to the probe body and the end cap respectively.

[0016] In one embodiment, the sensitive element includes a base, a shielding cover disposed on the base, and a flexible strip socket. The base and the shielding cover form a shielding cavity, which contains a sensitive element plate. A shielding tube passes through one side of the base, and a fiberglass tube connected to a support base is disposed inside the shielding tube. Waveguide wires and high-temperature guide wires are disposed inside the fiberglass tube. The flexible strip socket is disposed outside the shielding cover. The waveguide wires are connected to the sensitive element plate, and a portion of the sensitive element plate passes through the shielding cover and is electrically connected to the flexible strip socket.

[0017] In one embodiment, a support base is provided on one side of the base, and a coil support and a support column are provided on the side of the support base facing away from the base. The coil support and the support column are arranged opposite to each other. The coil support is electrically connected to the sensitive element board, and the support column is connected to the waveguide wire.

[0018] In one embodiment, a cable sheath is provided at one end of the shielding cover near the flexible strip socket, and the sensitive element board has multiple ribbon cables, each of which passes through the cable sheath and connects to the flexible strip socket;

[0019] And / or, a plug is provided at one end of the shielding tube away from the base, and the plug is connected to the shielding tube;

[0020] And / or, the shielding cavity is filled with sealant.

[0021] The technical solution of this utility model involves setting a circuit board bracket inside the electronic compartment of the displacement sensor. The circuit board bracket secures the sensitive element and the electronic board, ensuring their stability and reliable electrical connections. The circuit board bracket includes a connecting part and a bracket body. The connecting part connects to the bracket body, and the bracket body connects to both the electronic board and the sensitive element. This structural design achieves stable fixation of the electronic board and the sensitive element on the circuit board bracket, ensuring reliable electrical connections and signal transmission. This design effectively reduces the impact of vibration on the components, thereby improving the sensor's measurement accuracy and stability. By optimizing the internal structure of the electronic compartment, the poor vibration damping effect of traditional sealing methods is solved, significantly improving the measurement performance and reliability of the displacement sensor. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the displacement sensor provided by this utility model;

[0024] Figure 2 A cross-sectional structural schematic diagram of an embodiment of the displacement sensor provided by this utility model;

[0025] Figure 3 A schematic diagram of the structure of an embodiment of the displacement sensor provided by this utility model from another perspective;

[0026] Figure 4A schematic diagram of a circuit board bracket according to an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the structure of the first annular frame provided by this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the second annular frame provided by this utility model;

[0029] Figure 7 A schematic diagram of the structure of the electronic compartment provided by this utility model;

[0030] Figure 8 A schematic diagram of the structure of the sensitive element provided by this utility model.

[0031] Explanation of icon numbers:

[0032] 100. Displacement sensor; 1. Electronic compartment; 11. Housing; 12. Sealing layer; 2. Circuit board bracket; 21. Bracket body; 211. Connecting section; 212. Protruding section; 213. First annular frame; 213a. First anti-vibration hole; 214. Second annular frame; 214a. Second anti-vibration hole; 214b. Protrusion; 22. Connecting part; 221. First protrusion; 221a. First through hole; 222. Second protrusion; 222a. Second through hole; 222b, connecting protrusion; 3, sensitive element; 31, base; 311, shielding tube; 312, fiberglass tube; 313, waveguide wire; 314, high-temperature guide wire; 32, shielding cover; 3a, shielding cavity; 33, flexible strip socket; 34, cable sleeve; 4, tail cap assembly; 41, sealing sleeve; 42, clamping pin; 43, cable; 5, measuring rod assembly; 6, electronic board; 61, circuit board; 62, signal board; 7, seal.

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] This utility model proposes a displacement sensor 100.

[0038] Please see Figures 1 to 8 In one embodiment of the present invention, the displacement sensor includes an electronic chamber 1, a circuit board support 2, and a sealing element. The electronic chamber 1 contains a sensitive element 3 and an electronic board 6. The circuit board support 2 includes a connecting part 22 and a support body 21 disposed in the electronic chamber 1. The connecting part 22 is connected to the support body 21 and is connected to the inner wall of the electronic chamber 1. The support body 21 is connected to the electronic board 6 and the sensitive element 3 respectively. The sealing element 7 covers the electronic chamber 1.

[0039] In this embodiment, the displacement sensor 100 is a magnetostrictive displacement sensor. It works by generating a current pulse in the electronic board (signal board 62) within the electronic chamber 1 during measurement. This current generates a magnetic field that moves along the waveguide wire 313. Simultaneously, the movable magnetic ring on the measuring rod assembly 5 also generates a magnetic field. When the magnetic field generated by the current intersects with the magnetic field generated by the magnetic ring, the waveguide wire 313 in the sensing element 3 exhibits a magnetostrictive effect, generating a strain pulse. This pulse travels back along the waveguide wire 313 at a fixed speed and is detected by the measuring element. By measuring the time between the current pulse and the strain pulse, the position of the magnetic ring can be accurately determined. It is understood that the electronic chamber 1 is used to house and protect the internal sensing element 3 and electronic board 6. Typically, the electronic chamber 1 is made of metal or engineering plastic, which is not limited here. The type of electronic board 6 is not limited to, but includes, the form of a circuit board 61 and a signal board 62, which is not limited here. The circuit board bracket 2 is used to fix and support the electronic board 6. It should be noted that the connecting part 22 and the bracket body 21 together constitute the circuit board bracket 2. The shape of the bracket body 21 can be set according to specific needs. The connecting part 22 and the bracket body 21 can be integrally molded, or they can be injection molded or machined; this is not limited here. The connecting part 22 is used to fix the bracket body 21 to the inner wall of the electronic compartment 1. The form of the connecting part 22 here includes, but is not limited to, using a buckle or screw to fix it to the inner wall of the electronic compartment 1; this is not limited here. The specific implementation of the circuit board bracket will be described in the next embodiment, and will not be elaborated here. The material of the sealing element 7 here includes, but is not limited to, rubber, silicone, or other elastic materials. The sealing element 7 can be integrally covered or segmented covered to ensure the sealing performance of the electronic compartment 1. Figure 1 The sealing element 7 is arranged in a ring shape and is fitted on the outside of the electronic compartment 1.

[0040] The technical solution of this utility model involves setting a circuit board bracket 2 inside the electronic compartment 1 of the displacement sensor. The circuit board bracket 2 secures the sensitive element 3 and the electronic board 6, ensuring their stability and reliable electrical connections. The circuit board bracket 2 includes a connecting part 22 and a bracket body 21. The connecting part 22 is connected to the bracket body 21, and the bracket body 21 is connected to the electronic board 6 (circuit board 61, signal board 62) and the sensitive element 3 respectively. This structural design achieves stable fixation of the circuit board 6 (circuit board 61, signal board 62) and the sensitive element 3 on the circuit board bracket 2, ensuring the reliability of their electrical connections and signal transmission. This arrangement effectively reduces the impact of vibration on the components, thereby improving the sensor's measurement accuracy and stability. By optimizing the internal structure of the electronic compartment 1, the problem of poor shock absorption caused by traditional sealing methods is solved, significantly improving the measurement performance and reliability of the displacement sensor.

[0041] In one embodiment of the present invention, the bracket body 21 includes two connecting sections 211 and a protruding section 212. The protruding section 212 protrudes from the two connecting sections 211. Each of the two connecting sections 211 is provided with a connecting part 22. The protruding section 212 and the side ends of the two connecting sections 211 respectively form a limiting groove, and the sensitive element 3 is limited in the limiting groove.

[0042] Combination Figure 4 In this embodiment, to further enhance the stable support effect, the bracket body 21 is arranged in a U-shape. A protruding section 212 is located between the two connecting sections 211 and protrudes beyond each connecting section 211, allowing the bracket body 21 to effectively support the electronic board 6 (signal board 62, circuit board 61), etc. Simultaneously, the protruding section 212 and the side ends of the connecting sections 211 enclose a limiting groove for the sensing element 3. Through the combined action of the sidewall of the limiting groove and the bracket body 21, it is ensured that the electronic board 6 (signal board 62, circuit board 61) and the sensing element 3 remain in a predetermined position within the electronic compartment 1. This arrangement ensures that the device will not shift due to external forces or vibrations during operation, thereby guaranteeing the stability and reliability of the equipment.

[0043] In one embodiment of the present invention, the bracket body 21 includes a first annular frame 213 and a second annular frame 214 that are detachably connected. The connecting part 22 includes two first protrusions 221 and two second protrusions 222. The two first protrusions 221 are disposed on the inner side of the first annular frame 213 and are arranged opposite each other to form a first space for limiting the electronic board 6. The two second protrusions 222 are disposed on the inner side of the second annular frame 214 and are arranged opposite each other to form a second space for limiting the electronic board 6. Each first protrusion 221 has a first through hole 221a that penetrates the first protrusion 221, and each second protrusion 222 has a second through hole 222a that penetrates the second protrusion 222.

[0044] In this embodiment, to enhance structural stability, the first annular frame 213 and the second annular frame 214 are arranged in a ring shape, and the two first protrusions 221 and the two second protrusions 222 are arranged opposite each other to form a first space and a second space for limiting the electronic board 6. Combined with... Figure 5 Both the first through hole 221a and the second through hole 222a are used to fix the electronic board 6 (circuit board or signal board 62) to the connecting part 22 when the electronic board 6 is confined to the surface of the connecting part 22. It can be understood that the first protrusion 221 is connected to the electronic board 6 by fasteners such as bolts and screws passing through the through hole, and the through hole has an internal thread that matches the external thread of the bolt or screw; the second protrusion 222 is connected to the electronic board 6 in the same way. It should be noted that... Figure 5 This is one form of the first annular frame 213 and the first protrusion 221. Figure 6As one form of the second annular frame 214 and the second protrusion 222, the first annular frame 213 and the second annular frame 214 can be used individually or in combination. The connection method between the first annular frame 213 and the second annular frame 214 includes, but is not limited to, snap-fit ​​and plug-in methods, which are not limited here. In one embodiment, when the electronic board 6 includes a circuit board and a signal board 62, the circuit board can be placed on... Figure 5 The signal board 62 is placed between the two first protrusions 221 in the first annular frame 213 provided. Figure 6 The second annular frame 214 is positioned between the two second protrusions 222 and above the first annular frame 213. A connecting protrusion 222222 is formed at one end of the connecting portion 22 near the first annular frame 213, and is inserted into the through hole opened in the connecting portion 22 of the first annular frame 213. It is understood that the placement order of the circuit board and signal board 62 is not limited. In another embodiment, when a single electronic board 6 is placed on the circuit board annular frame, not only can the electronic board 6 be placed on... Figure 5 The first annular frame 213 provided can also be placed between the two first protrusions 221. Figure 6 The space between the two second protrusions 222 of the provided second annular frame 214 can be customized according to the requirements and is not limited. The above configuration provides another implementation of the circuit board bracket 2 with a relatively simple structure. Unlike the circuit board bracket 2 of the previous embodiment, the circuit board bracket 2 in this embodiment makes the manufacturing process simpler, reduces production costs, and facilitates large-scale production.

[0045] In one embodiment of the present invention, a plurality of protrusions 241b are provided at intervals on one side of the second annular frame 214, and the protrusions 241b are configured to engage with the electronic compartment 1.

[0046] In this embodiment, to further facilitate the fixing of the circuit board bracket 2 and the electronic compartment 1, combined with Figure 6 The second annular frame 214 has multiple protrusions 241b on one peripheral side, which are spaced apart circumferentially. It should be noted that the shape and size of the protrusions 241b are adapted to the internal shape and size of the electronic compartment 1. In one embodiment, the cross-section of the protrusion 241b is rectangular, engaging with a rectangular slot within the electronic compartment 1 for precise positioning. In another embodiment, the edge of the protrusion 241b is hook-shaped, engaging with the slot within the electronic compartment 1 for stronger fixing force. The shape of the protrusion 241b is not limited here and can be set according to specific needs.

[0047] In one embodiment of the present invention, the first annular frame 213 is further provided with a first anti-vibration hole 213a, which extends circumferentially along the first annular frame 213; the second annular frame 214 is further provided with a second anti-vibration hole 214a, which extends circumferentially along the second annular frame 214.

[0048] In this embodiment, to further achieve the shock absorption and buffering effect of the circuit board bracket 2, the first annular frame 213 and the second annular frame 214 are respectively provided with a first anti-vibration hole 213a and a second anti-vibration hole 214a. Taking the first anti-vibration hole 213a and the first annular frame 213 as examples, combined with... Figure 5 and Figure 6 The number of first anti-vibration holes 213a is not limited and can be one or two. In one embodiment, the first annular frame 213 has a first anti-vibration hole 213a along its circumference. The first anti-vibration hole 213a is elliptical in shape, which allows it to better adapt to the shape of the support body 21 and provides greater deformation space in some directions, thereby enhancing the shock absorption effect. In another embodiment, the first annular frame 213 has two oppositely arranged first anti-vibration holes 213a, which intersect with two first protrusions 221, so that the first annular frame 213 can effectively absorb and disperse vibration energy in multiple directions. The second annular frame 214 and the second anti-vibration hole 214a are the same as those described in the embodiments of the first anti-vibration hole 213a and the first annular frame 213, and will not be repeated here.

[0049] In one embodiment of the present invention, the electronic compartment 1 includes a housing 11 and at least one sealing layer 12, with each sealing layer 12 disposed on the outer periphery of the housing 11.

[0050] In this embodiment, combined with Figure 7 It should be noted that the housing 11 is used to house and protect electronic components, and its materials include, but are not limited to, metals and engineering plastics. A sealing layer 12 is located on the outer periphery of the housing 11. The sealing layer 12 has multiple through slots, spaced apart, and each slot contains multiple sealing elements 7. The sealing elements 7 are typically made of rubber, silicone, or other materials, and are not limited here. It is understood that the electronic compartment 1 can be either a double-sealed structure or a single-sealed structure, depending on specific requirements; a single-sealed structure means that one sealing layer 12 is provided on the outer periphery of the housing 11, while a double-sealed structure means that two sealing layers 12 are provided on the outer periphery of the housing 11. The above configuration improves the protective performance.

[0051] In one embodiment of the present invention, the displacement sensor further includes a tail cover assembly 4, which includes a tail cover body, a sealing sleeve 41, a clamping pin 42, and a cable 43. The cable 43 passes through the tail cover body, the sealing sleeve 41 is sleeved around the cable 43, the tail cover body is connected to the clamping pin 42, and the circuit board is electrically connected to the cable 43.

[0052] In this embodiment, combined with Figure 1 and Figure 2 The tail cover body protects the internal circuit board and sensitive component 3, and is fixed to the electronic compartment 1. The sealing sleeve 41 is combined with the electronic compartment 1 to form a whole to ensure that the hydraulic cylinder is waterproof and dustproof. The sealing sleeve 41 is used to hold the cable and provide a seal. The clamping pin 42 is used to fix the cable 43. The clamping pin 42 itself has installation threads and connects to the tail cover body. It should be noted that the tail cover assembly 4 also includes a retaining ring. The sealing sleeve 41 and the clamping pin 42 are fitted onto the cable and are tightened and pressed firmly by the threads on the clamping pin 42 and the tail cover body. Finally, the clamping pin 42 is screwed onto the tail cover body by threads, and sealant is applied at the contact point between the tail cover body and the cable 43 to provide a seal.

[0053] In one embodiment of this utility model, the displacement sensor further includes a measuring rod assembly 5, which includes a measuring rod body and an end cap connected together. The measuring rod body is connected to one end of the electronic compartment 1, and the end cap is disposed at one end of the measuring rod body. The electronic compartment 1 is connected to the measuring rod body and the end cap respectively.

[0054] In this embodiment, combined with Figure 1 It should be noted that the measuring rod body here is in the form of a measuring rod, with a base at one end and an end cap at the other end. A magnetic ring is fitted on the measuring rod, and a fluorine tube passes through the measuring rod, with the shielding tube 311 passing through the fluorine tube. It is understood that the connection methods between the measuring rod body and the end cap include, but are not limited to, threaded connections and welding, with welding being the preferred method here. The connection methods between the electronic compartment 1 and the measuring rod body and end cap include, but are not limited to, threaded connections, snap-fit ​​connections, and welding, with welding being the preferred method here. The electronic compartment 1 is connected to the measuring rod assembly by welding, thus welding the electronic compartment 1, measuring rod body, and end cap together using an automatic argon arc welding machine. A sealing ring is then fitted onto the threads of the electronic compartment 1, completing the assembly of the measuring rod assembly 5. Therefore, when the sensor requires maintenance, it is not necessary to remove the measuring rod assembly 5 from the hydraulic cylinder, thus eliminating the need to stop the equipment when removing the electronic compartment 1, reducing maintenance costs.

[0055] In one embodiment of this utility model, the sensitive element includes a base 31, a shielding cover 32 disposed on the base 31, and a flexible strip socket 33. The base 31 and the shielding cover 32 enclose a shielding cavity 3a, which contains a sensitive element 3 plate. A shielding tube 311 is provided on one side of the base 31. A fiberglass tube 312 connected to the support base is provided inside the shielding tube 311. A waveguide wire 313 and a high-temperature guide wire 314 are provided inside the fiberglass tube 312. The flexible strip socket 33 is disposed on the outside of the shielding cover 32. The waveguide wire 313 is connected to the sensitive element 3 plate, and part of the structure of the sensitive element 3 plate passes through the shielding cover 32 and is electrically connected to the flexible strip socket 33.

[0056] In this embodiment, combined with Figure 8 It should be noted that the base 31 is made of stainless steel, and the shielding cover 32 is welded and fixed to the base 31 during installation. After the sensitive element 3 is installed in the shielding cavity 3a, the shielding cavity 3a is filled with insulating sealant. The shielding tube 311 is made of stainless steel here, and the shielding tube 311 is welded together with the shielding cover 32 and the base 31 to form a shielding cavity to shield the sensitive element 3 from external environmental interference. The fiberglass tube 312 is used to reduce vibration, the waveguide wire 313 is used to generate and propagate elastic wave signals, and the high-temperature guide wire 314 is used to transmit pulse signals. The above arrangement makes the sensitive element 3 an independent unit, which can effectively shield external interference signals, thereby achieving high precision.

[0057] In one embodiment of the present invention, a support base is provided on one side of the base 31, and a coil support and a support column are provided on the side of the support base facing away from the base 31. The coil support and the support column are arranged opposite to each other. The coil support is electrically connected to the sensitive element 3 plate, and the support column is connected to the waveguide wire 313.

[0058] In this embodiment, combined with Figure 8 It should be noted that the bracket base supports the coil bracket, bracket column, and sensitive element plate 3. The bracket base can be connected and fixed to the base 31 by bolts, snap-fit, or other methods. The coil bracket is used to amplify the signal, has a copper coil wound around it, and is electrically connected to the sensitive element plate 3. The support column is used to filter noise and is welded to the waveguide wire 313. Understandably, during installation, the waveguide wire 313 can be passed through the bracket base and welded to the support column and sensitive element plate 3 respectively, and the high-temperature guide wire 314 can be passed through the bracket base and welded to the sensitive element plate 3.

[0059] In one embodiment of this utility model, a protective sleeve 34 is provided at one end of the shielding cover 32 near the flexible strip socket 33, and the sensitive element 3 plate has multiple ribbon cables, each of which passes through the protective sleeve 34 and is connected to the flexible strip socket 33.

[0060] And / or, a plug is provided at the end of the shielding tube 311 away from the base 31, and the plug is connected to the shielding tube 311;

[0061] And / or, the shielding cavity 3a is filled with sealant.

[0062] In this embodiment, combined with Figure 8 It should be noted that the cable sleeve 34 is used to prevent the flexible connector 33 from being scratched by the shielding cover 32. The ribbon cable is soldered and fixed to the sensitive element 3 board, and the ribbon cable consists of multiple lines evenly spaced on the sensitive element 3 board. The ribbon cable passes through the cable sleeve 34 and connects to the flexible connector 33. The cable sleeve 34 and the shielding cover 32 pass through the ribbon cable of the flexible connector 33, and the ribbon cable of the flexible connector 33 is soldered together with the sensitive element 3 board. The flexible connector 33 connects the sensitive element 3 board and the sensor circuit board for signal transmission, enabling plug-and-play functionality.

[0063] It should be noted that the plug is made of stainless steel and is used to shield the sensitive element 3 from external environmental interference, thus protecting the sensitive element 3. It is understood that the shielding tube 311 is laser-welded to the plug, and the shielding tube 311 is laser-welded to the base 31.

[0064] It should be noted that, in order to further ensure the waterproof and airtight seal of the sensitive element 3, after the internal components of the sensitive element 3 are assembled, the entire interior of the shielding cavity 3a is filled with sealant. The sealant material here includes, but is not limited to, silicone rubber sealant, polyurethane sealant, epoxy resin sealant, etc.

[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A displacement sensor, characterized in that, The displacement sensor includes: An electronic compartment, which contains sensitive components and electronic boards; A circuit board support includes a connecting part and a support body disposed within the electronic compartment. The connecting part is connected to the support body and to the inner wall of the electronic compartment. The support body is connected to the electronic board and the sensitive element, respectively. A sealing element that covers the electronic compartment.

2. The displacement sensor as described in claim 1, characterized in that, The bracket body includes two connecting sections and a protruding section. The protruding section protrudes from the two connecting sections and each of the two connecting sections is provided with a connecting part. The protruding section and the side ends of the two connecting sections respectively form a limiting groove, and the sensitive element is limited within the limiting groove.

3. The displacement sensor as described in claim 1, characterized in that, The bracket body also includes a detachably connected first annular frame and a second annular frame. The connecting part includes two first protrusions and two second protrusions. The two first protrusions are disposed on the inner side of the first annular frame and are arranged opposite each other to form a first space for limiting the electronic board. The two second protrusions are disposed on the inner side of the second annular frame and are arranged opposite each other to form a second space for limiting the electronic board. Each first protrusion has a first through hole penetrating the first protrusion, and each second protrusion has a second through hole penetrating the second protrusion.

4. The displacement sensor as described in claim 3, characterized in that, The second annular frame has a plurality of protrusions spaced apart on one side, the protrusions being configured to engage with the electronic compartment.

5. The displacement sensor as described in claim 3 or 4, characterized in that, The first annular frame is also provided with a first anti-vibration hole, which extends circumferentially along the first annular frame; the second annular frame is also provided with a second anti-vibration hole, which extends circumferentially along the second annular frame.

6. The displacement sensor as described in any one of claims 1 to 4, characterized in that, The electronic compartment includes a housing and at least one sealing layer, each of the sealing layers being disposed on the outer periphery of the housing.

7. The displacement sensor as described in any one of claims 1 to 4, characterized in that, The displacement sensor also includes a tail cover assembly, which includes a tail cover body, a sealing sleeve, a clamping pin, and a cable. The cable passes through the tail cover body, the sealing sleeve is fitted around the cable, and the tail cover body is connected to the clamping pin. The circuit board is electrically connected to the cable.

8. The displacement sensor as described in any one of claims 1 to 4, characterized in that, The displacement sensor also includes a measuring rod assembly, which includes a measuring rod body and an end cap connected together. The measuring rod body is connected to one end of the electronic compartment, and the end cap is disposed at one end of the measuring rod body. The electronic compartment is connected to the measuring rod body and the end cap respectively.

9. The displacement sensor as described in any one of claims 1 to 4, characterized in that, The sensitive element includes a base, a shielding cover disposed on the base, and a flexible strip socket. The base and the shielding cover enclose a shielding cavity, which contains a sensitive element plate. A shielding tube passes through one side of the base, and a fiberglass tube connected to a support base is disposed inside the shielding tube. Waveguide wires and high-temperature guide wires are disposed inside the fiberglass tube. The flexible strip socket is disposed outside the shielding cover. The waveguide wires are connected to the sensitive element plate, and a portion of the sensitive element plate passes through the shielding cover and is electrically connected to the flexible strip socket.

10. The displacement sensor as described in claim 9, characterized in that, A support base is provided on one side of the base, and a coil support and a support column are provided on the side of the support base facing away from the base. The coil support and the support column are arranged opposite to each other. The coil support is electrically connected to the sensitive element board, and the support column is connected to the waveguide wire. And / or, the shielding cover is provided with a cable sheath at one end near the flexible strip socket, and the sensitive element board has multiple ribbon cables, each of which passes through the cable sheath and connects to the flexible strip socket; And / or, a plug is provided at one end of the shielding tube away from the base, and the plug is connected to the shielding tube; And / or, the shielding cavity is filled with sealant.

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