Magnetostrictive displacement sensor

Abstract

The utility model provides a magnetostrictive displacement sensor relates to sensor technical field, include: electronic warehouse base, electronic warehouse is with electronic warehouse base detachable connection, circuit board subassembly is located in electronic warehouse, measuring rod is worn in electronic warehouse base and electronic warehouse, with circuit board subassembly electricity is connected, electronic warehouse base is equipped with installation groove and at least one first installation hole, and first installation hole is connected with installation groove, and at least one part of electronic warehouse is located in installation groove, and the magnetostrictive displacement sensor still includes: at least one tight piece, each tight piece is worn in one corresponding first installation hole, and tight piece is used to with the outer wall surface of electronic warehouse is resisted. The utility model's technical scheme, electronic warehouse and electronic warehouse base are the split type structure, adopt the way of core pulling to magnetostrictive displacement sensor and assemble, need not to rotate measuring rod, and magnetostrictive displacement sensor can install under the linear assembly condition or the arc line assembly condition, and the scope of application is wider.

Description

Technical Field

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

[0002] In related magnetostrictive displacement sensors, the electron housing and mounting base are integrated or fixed together by welding. Because the mounting base has external threads on its outer wall, the sensor needs to be fixed by rotation during assembly. However, under curved assembly conditions, the probe cannot rotate with the electron housing, thus limiting the sensor's application scenarios. Utility Model Content

[0003] In order to solve or improve the technical problem that magnetostrictive displacement sensors are not suitable for curved assembly conditions, one objective of this utility model is to provide a magnetostrictive displacement sensor.

[0004] To achieve the above objectives, this utility model provides a magnetostrictive displacement sensor, comprising: an electronic chamber base; an electronic chamber detachably connected to the electronic chamber base; a circuit board assembly disposed within the electronic chamber; a measuring rod passing through the electronic chamber base and the electronic chamber, the measuring rod being electrically connected to the circuit board assembly; the electronic chamber base having a mounting groove and at least one first mounting hole communicating with the mounting groove; at least a portion of the electronic chamber being disposed within the mounting groove; the magnetostrictive displacement sensor further comprising: at least one clamping member, each clamping member passing through a corresponding first mounting hole, the clamping member being used to abut against the outer wall surface of the electronic chamber to achieve a detachable connection between the electronic chamber and the electronic chamber base.

[0005] This invention aims to provide a magnetostrictive displacement sensor with a separate electronic housing and base. During assembly, the electronic housing base is first connected to the cylinder body of the hydraulic cylinder. Then, the electronic housing and probe are inserted into the cylinder body and base, and secured with clamping components. The magnetostrictive displacement sensor is assembled using a pull-out method, eliminating the need to rotate the probe. The advantages of this design are: firstly, the magnetostrictive displacement sensor can be installed under both linear and curved assembly conditions, broadening its applicability; secondly, it simplifies the assembly process, reduces assembly difficulty, and makes operation more convenient.

[0006] In some technical solutions, optionally, the electronic compartment includes: a main body; a connecting part connected to the main body, the connecting part being disposed in a mounting groove, and the connecting part having a second mounting hole; wherein, the circuit board assembly is disposed in the main body, the clamping member is used to abut against the outer wall surface of the connecting part, and the measuring rod passes through the electronic compartment base and the second mounting hole.

[0007] In this technical solution, the electronic compartment is functionally divided into a main body and a connecting part. The main body is used to install circuit board assemblies, and the connecting part is used to connect to the electronic compartment base. This design optimizes the spatial layout and stress distribution, resulting in a more compact overall structure and greater ease of assembly and disassembly.

[0008] In some technical solutions, the connecting part can optionally be shaped as a frustum or a pyramid, and the connecting part has a small end and a large end; the small end is used to connect with the main body, and the large end is used to abut against the wall of the mounting groove; when the electronic compartment and the electronic compartment base are connected, the end face of the clamping member abuts against the outer wall of the connecting part.

[0009] In this technical solution, when the clamping member abuts against the outer wall of the connector radially, the inclined surface decomposes the radial force into an axial component, allowing the large end to abut more tightly against the wall of the mounting groove. This design allows the clamping member to simultaneously restrict both radial and axial movement of the electronic compartment, providing stronger resistance to loosening compared to a cylindrical connector that relies solely on radial clamping.

[0010] In some technical solutions, optionally, a first placement groove is provided on the groove wall of the mounting groove; the magnetostrictive displacement sensor further includes: a first sealing element, disposed in the first placement groove, the first sealing element being used to abut against the large end.

[0011] In this technical solution, by setting a first sealing element, the sealing performance between the electronic compartment and the electronic compartment base in the connected state is improved, and the two are sealed together.

[0012] In some technical solutions, the main body may optionally have a chamfered structure at one end near the connecting part.

[0013] In this technical solution, by setting a chamfered structure, firstly, it can largely avoid rigid collisions between the main body and other components at the corners of the outer wall; secondly, it is used to avoid the clamping parts, so as to facilitate the disassembly of the clamping parts by the workers.

[0014] In some technical solutions, the measuring rod may optionally include: a first part, which is inserted through the electronic compartment base and the electronic compartment, and one end of the first part is electrically connected to the circuit board assembly; a second part, one end of which is connected to the other end of the first part, and the second part is a flexible part; and an end cap, which is disposed at the other end of the second part.

[0015] In this technical solution, by setting at least a portion of the measuring rod as a flexible rod part, the measuring rod can be bent into the desired shape under arc-shaped assembly conditions to achieve step-by-step assembly along the curved trajectory.

[0016] In some technical solutions, optionally, the electronic compartment base is provided with a third mounting hole, which is connected to the mounting groove, and the measuring rod passes through the third mounting hole and the electronic compartment.

[0017] In this technical solution, by setting a third mounting hole, firstly, the measuring rod can pass through to ensure that the measuring rod can be connected to the circuit board assembly inside the electronic compartment; secondly, a pressure-resistant outer tube can be installed when necessary to meet the requirements of measurement scenarios with pressure resistance requirements.

[0018] In some technical solutions, the magnetostrictive displacement sensor may optionally include: a pressure-resistant outer tube, at least a portion of which is disposed within a third mounting hole, and the pressure-resistant outer tube is sleeved on the measuring rod.

[0019] In this technical solution, in order to meet the pressure resistance requirements in some measurement scenarios, a pressure-resistant outer tube needs to be installed to protect the measuring rod from pressure, thereby improving the service life of the magnetostrictive displacement sensor.

[0020] In some technical solutions, the electronic compartment base may optionally include a third part and a fourth part connected together; a third mounting hole is provided in the third part, and a mounting groove and a first mounting hole are provided in the fourth part; the outer wall of the third part is provided with mounting threads; the outer wall of the third part is also provided with a second placement groove for placing a second seal.

[0021] In this technical solution, by optimizing the structure of the electronic compartment base, the overall structure becomes more compact and easier to assemble and disassemble. The installation threads enable a threaded connection between the electronic compartment base and the cylinder body, facilitating easy disassembly and assembly, and aiding in maintenance or replacement. The inclusion of a second sealing element improves the sealing performance between the electronic compartment base and the cylinder body when connected, achieving a sealed connection.

[0022] In some technical solutions, the magnetostrictive displacement sensor may optionally include: a ring magnet, sleeved on the measuring rod, the ring magnet being used to connect with the piston of the hydraulic cylinder; wherein the piston is used to drive the ring magnet to move relative to the measuring rod.

[0023] In this technical solution, the annular magnet moves with the piston. A sensing element detects the change in relative position between the annular magnet and the measuring rod, and transmits the displacement signal to the signal board. The signal board converts the displacement signal into an electrical signal and transmits it to the power supply board. The power supply board feeds back the electrical signal to an external data center via a male connector. The external data center determines the piston's position based on the electrical signal.

[0024] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned by practice of the present invention. Attached Figure Description

[0025] Figure 1 A schematic diagram of a magnetostrictive displacement sensor according to an embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram of a magnetostrictive displacement sensor according to another embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram of a magnetostrictive displacement sensor according to another embodiment of the present invention is shown;

[0028] Figure 4 A schematic diagram of a magnetostrictive displacement sensor according to another embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram of a magnetostrictive displacement sensor according to another embodiment of the present invention is shown;

[0030] Figure 6 A schematic diagram of an electronic compartment base according to an embodiment of the present invention is shown;

[0031] Figure 7 A schematic diagram of a magnetostrictive displacement sensor according to another embodiment of the present invention is shown;

[0032] Figure 8 A schematic diagram of an electronic compartment according to an embodiment of the present invention is shown;

[0033] Figure 9 A schematic diagram is shown of a magnetostrictive displacement sensor and a hydraulic cylinder in a connected state according to an embodiment of the present invention.

[0034] in, Figures 1 to 9 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0035] 1: Magnetostrictive displacement sensor; 10: Electronic compartment base; 101: Third part; 102: Fourth part; 103: Mounting slot; 104: First mounting hole; 105: First placement slot; 106: Third mounting hole; 107: Mounting thread; 108: Second placement slot; 11: Electronic compartment; 111: Main body; 1111: Chamfered structure; 112: Connecting part; 1121: Small end; 1122: Large end; 1123: Second mounting hole; 12: Circuit Board assembly; 122: Sensing element; 124: Signal board; 126: Power board; 128: Circuit board bracket; 13: Probe; 131: First part; 132: Second part; 133: End cap; 14: Tightening member; 151: First seal; 152: Second seal; 16: Pressure-resistant outer tube; 171: Ring magnet; 172: Non-magnetic gasket; 181: Aviation plug tail cover; 182: Aviation plug male head; 2: Hydraulic cylinder; 20: Cylinder body; 22: Piston. Detailed Implementation

[0036] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, embodiments of the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0038] In related magnetostrictive displacement sensors, the electron housing and mounting base are an integrated structure or fixed together by welding. Because the outer wall of the mounting base has external threads, the magnetostrictive displacement sensor needs to be fixed by rotation during assembly. However, under curved assembly conditions, the sensor's probe cannot rotate synchronously with the electron housing due to assembly environment or its own structural limitations, thus restricting the application scenarios of magnetostrictive displacement sensors with the above structural form.

[0039] This invention aims to provide a magnetostrictive displacement sensor with a separate electronic housing and base. During assembly, the electronic housing base is first connected to the cylinder body of the hydraulic cylinder. Then, the electronic housing and probe are inserted into the cylinder body and base, and secured with clamping components. The magnetostrictive displacement sensor is assembled using a pull-out method, eliminating the need to rotate the probe. The advantages of this design are: firstly, the magnetostrictive displacement sensor can be installed under both linear and curved assembly conditions, broadening its applicability; secondly, it simplifies the assembly process, reduces assembly difficulty, and makes operation more convenient.

[0040] It should be noted that "straight line" and "curved line" refer to the path shape of the magnetostrictive displacement sensor during assembly. Under straight line assembly conditions, the assembly path of the magnetostrictive displacement sensor is a single, straight path without bends, requiring the sensor to be installed and fixed along the same straight line. Under curved line assembly conditions, the assembly path of the magnetostrictive displacement sensor has curvature, turns, or changes in direction, requiring at least a portion of the measuring rod to be made into a flexible structure to achieve step-by-step assembly along the curved trajectory.

[0041] The advantages of this magnetostrictive displacement sensor are as follows: First, it has a simple and compact structure, and adopts a core-pulling design, which facilitates installation and maintenance; second, it can use a flexible measuring rod and bend it into the required shape, making it suitable for arc-shaped measurement environments (arc-shaped assembly conditions); third, it has reserved mounting holes for a pressure-resistant outer tube, which can be used in measurement applications with pressure resistance requirements.

[0042] The following reference Figures 1 to 9 This invention describes a magnetostrictive displacement sensor provided according to some embodiments of the present invention.

[0043] In one embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, the magnetostrictive displacement sensor 1 includes an electronic housing base 10, an electronic housing 11, a circuit board assembly 12, and a measuring rod 13.

[0044] The electronic compartment 11 is detachably connected to the electronic compartment base 10. A circuit board assembly 12 is disposed within the electronic compartment 11. A probe 13 passes through the electronic compartment base 10 and the electronic compartment 11, and is electrically connected to the circuit board assembly 12. The electronic compartment base 10 has a mounting groove 103 and at least one first mounting hole 104, the first mounting hole 104 communicating with the mounting groove 103. At least a portion of the electronic compartment 11 is disposed within the mounting groove 103.

[0045] The magnetostrictive displacement sensor 1 also includes at least one clamping member 14. Each clamping member 14 is inserted into a corresponding first mounting hole 104 and is used to abut against the outer wall of the electronic compartment 11 to achieve a detachable connection between the electronic compartment 11 and the electronic compartment base 10.

[0046] The magnetostrictive displacement sensor 1 is a sensor that achieves non-contact, high-precision displacement measurement based on the magnetostrictive effect. The annular magnet 171 of the magnetostrictive displacement sensor 1 is connected to the piston 22 of the hydraulic cylinder 2, and the annular magnet 171 moves with the piston 22. The circuit board assembly 12 senses the position change of the annular magnet 171, converts the displacement signal into an electrical signal, and feeds the electrical signal back to an external data center (such as a control module) so that the external data center can obtain the movement position of the piston 22.

[0047] The electronic compartment base 10 serves as the mounting base for the electronic compartment 11. The electronic compartment 11, relative to the circuit board assembly 12, primarily functions as a mounting carrier and protects the electronic components.

[0048] The number of first mounting holes 104 is at least one, that is, there can be one, two or more first mounting holes 104, which can be flexibly set according to actual needs. The number of clamping members 14 is at least one, that is, there can be one, two or more clamping members 14, which can be flexibly set according to actual needs.

[0049] When there are multiple first mounting holes 104 and multiple clamping members 14, each clamping member 14 is inserted into a corresponding first mounting hole 104.

[0050] The connection between the electronic compartment 11 and the electronic compartment base 10 is detachable, which makes it convenient for staff to disassemble and install, and facilitates maintenance or replacement.

[0051] Optionally, such as Figure 9 As shown, the electronic compartment base 10 is used to connect to the cylinder body 20 of the hydraulic cylinder 2.

[0052] This utility model aims to provide a magnetostrictive displacement sensor 1. The electronic chamber 11 and the electronic chamber base 10 are separate structures. When assembling the magnetostrictive displacement sensor 1, the electronic chamber base 10 is first connected to the cylinder body 20 of the hydraulic cylinder 2. Then, the electronic chamber 11 and the measuring rod 13 are inserted into the cylinder body 20 and the electronic chamber base 10, and the electronic chamber 11 and the electronic chamber base 10 are fixed by the clamping member 14. The magnetostrictive displacement sensor 1 is assembled using a core-pulling method, eliminating the need to rotate the measuring rod 13. The advantages of this design are: firstly, the magnetostrictive displacement sensor 1 can be installed under both linear and curved assembly conditions, thus having a wider range of applications; secondly, it simplifies the assembly process, reduces assembly difficulty, and makes operation more convenient.

[0053] It should be noted that "straight line" and "curved line" refer to the path shape of the magnetostrictive displacement sensor during assembly. Under straight line assembly conditions, the assembly path of the magnetostrictive displacement sensor 1 is a single, straight path without bends, requiring the magnetostrictive displacement sensor 1 to be installed and fixed along the same straight line. Under curved line assembly conditions, the assembly path of the magnetostrictive displacement sensor 1 has curvature, turns, or changes in direction, requiring at least a portion of the measuring rod 13 to be set as a flexible structure to achieve step-by-step assembly along the curved trajectory.

[0054] In some embodiments, the clamping member 14 is optionally threadedly connected to the first mounting hole 104. Operators can tighten or loosen the clamping member 14 by rotating it. When the electronic compartment 11 needs to be secured, the clamping member 14 is tightened so that its end face abuts against the outer wall of the electronic compartment 11; when the electronic compartment 11 needs to be disassembled, the clamping member 14 is loosened. This design is simple, convenient, and quick to operate.

[0055] In some embodiments, the clamping member 14 is optionally engaged within the first mounting hole 104. By changing the position of the clamping member 14 within the first mounting hole 104, the clamping member 14 can limit or release the electronic compartment 11.

[0056] In some embodiments, optionally, one end of the clamping member 14 is used to abut against the outer wall of the electronic compartment 11, and the other end of the clamping member 14 is provided with an internal hexagon countersunk hole. By providing an internal hexagon countersunk hole, it is convenient for workers to use tools (such as an internal hexagon wrench) to rotate the clamping member 14, which helps to reduce the difficulty of disassembly and assembly.

[0057] In one specific embodiment, the first mounting hole 104 is a threaded hole. The clamping member 14 is a hex socket head cap screw. The parameters of the hex socket head cap screw are M3×5. Wherein, "M3" indicates that the nominal diameter of the thread (the maximum diameter of the thread) is 3mm. "5" indicates that the length of the screw is 5mm.

[0058] In one specific embodiment, there are three first mounting holes 104 and three clamping members 14. Each clamping member 14 is inserted into a corresponding first mounting hole 104.

[0059] In some embodiments, the electronic compartment base 10 and the cylinder body 20 of the hydraulic cylinder 2 are optionally detachably connected, which facilitates disassembly and assembly by staff and is beneficial for maintenance or replacement.

[0060] In one specific embodiment, the outer wall of the electronic compartment base 10 is provided with an installation thread 107 (an external thread). The cylinder body 20 of the hydraulic cylinder 2 is provided with a reserved mounting hole, and the wall of the reserved mounting hole is provided with an internal thread. Through the mutual cooperation of the installation thread 107 and the internal thread, a detachable connection between the electronic compartment base 10 and the cylinder body 20 is achieved.

[0061] Since the electronic housing base 10 and the electronic housing 11 adopt a split structure, when installing the magnetostrictive displacement sensor 1 under linear assembly conditions, either the traditional installation method (first connect the electronic housing base 10 and the electronic housing 11, and then install the magnetostrictive displacement sensor 1 by rotation) or the core-pulling installation method can be used. The installation method is more flexible and has a wider range of applications.

[0062] In some embodiments, optionally, such as Figure 1 As shown, the circuit board assembly 12 includes a sensing element 122, a signal board 124, and a power board 126. The sensing element 122 is electrically connected to the signal board 124, the power board 126, and the signal board 124 is also electrically connected to the power board 126. The sensing element 122, the signal board 124, and the power board 126 are all located inside the electronic compartment 11. The sensing element 122 is electrically connected to one end of the measuring rod 13.

[0063] The annular magnet 171 moves with the piston 22. The sensing element 122 detects the change in relative position between the annular magnet 171 and the measuring rod 13, and transmits the displacement signal to the signal board 124. The signal board 124 converts the displacement signal into an electrical signal and transmits it to the power supply board 126. The power supply board 126 feeds back the electrical signal to the external data center via the male connector 182. The external data center determines the movement position of the piston 22 based on the electrical signal.

[0064] In some embodiments, optionally, such as Figure 1 As shown, the circuit board assembly 12 also includes a circuit board bracket 128. The circuit board bracket 128 is disposed within the electronics compartment 11. The sensitive element 122, the signal board 124, and the power board 126 are all disposed on the circuit board bracket 128. The circuit board bracket 128 serves as a mounting carrier. The signal board 124 is disposed on one side of the circuit board bracket 128, and the power board 126 is disposed on the other side of the circuit board bracket 128. The sensitive element 122 is mounted on the circuit board bracket 128.

[0065] In some embodiments, the electronic compartment 11 may optionally include a mounting cavity. The sensing element 122, signal board 124, power board 126, and circuit board support 128 are all disposed within the mounting cavity of the electronic compartment 11. The cavity wall of the mounting cavity has a stepped structure. The stepped surface of the stepped structure abuts against the circuit board support 128 to limit the movement of the circuit board support 128.

[0066] In some embodiments, optionally, such as Figure 1 , Figure 4 , Figure 5 and Figure 7 As shown, the magnetostrictive displacement sensor 1 also includes a tail cap 181 and a male connector 182. The electronics compartment 11 has a mounting cavity with an opening at one end. At least a portion of the tail cap 181 is disposed within the mounting cavity to seal the opening of the mounting cavity. The tail cap 181 and the electronics compartment 11 are connected by welding.

[0067] At least a portion of the male connector 182 is located inside the tail cover 181. The male connector 182 and the tail cover 181 are assembled together, and adhesive is applied from inside the tail cover 181 to improve sealing performance.

[0068] In some embodiments, optionally, such as Figure 1 , Figure 4 , Figure 5 and Figure 8 As shown, the electronic compartment 11 includes a main body 111 and a connecting part 112. The connecting part 112 is connected to the main body 111. The connecting part 112 is disposed in the mounting groove 103, and a second mounting hole 1123 is provided on the connecting part 112.

[0069] The circuit board assembly 12 is located inside the main body 111, the clamping member 14 is used to abut against the outer wall of the connecting part 112, and the measuring rod 13 passes through the electronic compartment base 10 and the second mounting hole 1123.

[0070] It should be noted that the shape of the connecting part 112 is adapted to the shape of the mounting groove 103.

[0071] The mounting cavity of the electronic compartment 11 is located in the main body 111. The circuit board assembly 12 is located in the mounting cavity. The second mounting hole 1123 of the connecting part 112 communicates with the mounting cavity of the main body 111 so that one end of the probe 13 can be electrically connected to the circuit board assembly 12.

[0072] The connecting part 112 is located in the mounting groove 103 of the electronic compartment base 10. The contour of the mounting groove 103 can form a radial limit on the connecting part 112. With the action of the clamping member 14 against the outer wall of the connecting part 112, the circumferential and axial positions of the electronic compartment 11 relative to the electronic compartment base 10 can be precisely constrained, avoiding misalignment or loosening caused by positioning ambiguity during assembly.

[0073] By functionally dividing the electronic compartment 11 into a main body 111 and a connecting part 112, the main body 111 is used to install the circuit board assembly 12, and the connecting part 112 is used to connect to the electronic compartment base 10. This design helps to optimize the spatial layout and stress conditions, making the overall structure more compact and easier to assemble and disassemble.

[0074] In one specific embodiment, the connecting part 112 and the main body 111 are an integral structure, that is, the electronic compartment 11 is an integral structure. Compared with post-processing (such as welding or bonding), it has better mechanical properties and higher connection strength, which helps to reduce the number of parts and improve assembly efficiency.

[0075] In some embodiments, optionally, such as Figure 1 , Figure 4 and Figure 8 As shown, the connecting part 112 is shaped like a frustum or a pyramid, and has a small end 1121 and a large end 1122. The small end 1121 is used to connect with the main body 111, and the large end 1122 is used to abut against the wall of the mounting groove 103.

[0076] When the electronic compartment 11 and the electronic compartment base 10 are connected, the end face of the clamping member 14 abuts against the outer wall surface of the connecting part 112.

[0077] The outer wall surface of the connecting part 112 is an inclined surface or a cut surface. The outer wall surface of the connecting part 112 is perpendicular to the center line of the first mounting hole 104. This design helps to improve the limiting effect of the clamping member 14 on the electronic compartment 11 and effectively prevents axial movement between the electronic compartment 11 and the electronic compartment base 10.

[0078] When the clamping member 14 abuts against the outer wall of the connecting portion 112 radially, the inclined surface (outer wall surface of the connecting portion 112) decomposes the radial force into an axial component (pointing towards the large end 1122), so that the large end 1122 can abut against the groove wall of the mounting groove 103 more tightly. With this design, the clamping member 14 can simultaneously restrict the radial sway and axial movement of the electronic compartment 11, and has a stronger resistance to loosening compared to the cylindrical connecting portion 112 which is fixed by only radial clamping.

[0079] In some embodiments, optionally, such as Figure 5 and Figure 6 As shown, the mounting groove 103 has a first placement groove 105 on its groove wall.

[0080] The magnetostrictive displacement sensor 1 also includes a first seal 151. The first seal 151 is disposed in the first placement groove 105 and is used to abut against the large end 1122.

[0081] By setting the first sealing element 151, it is beneficial to improve the sealing performance between the electronic compartment 11 and the electronic compartment base 10 when they are in the connected state, so as to achieve a sealed connection between the two.

[0082] In one specific embodiment, the first seal 151 is an O-ring.

[0083] In some embodiments, optionally, such as Figure 1 , Figure 4 and Figure 8 As shown, the main body 111 has a chamfered structure 1111 at one end near the connecting part 112.

[0084] By setting the chamfered structure 1111, firstly, it can largely avoid rigid collisions between the main body 111 and other components at the corners of the outer wall; secondly, it is used to avoid the clamping member 14, so as to facilitate the disassembly of the clamping member 14 by the staff.

[0085] Optionally, the chamfer structure 1111 is provided at the corner of the outer wall surface of the main body 111.

[0086] In some embodiments, optionally, such as Figure 1 , Figure 4 , Figure 5 and Figure 7 As shown, the measuring rod 13 includes a first part 131, a second part 132, and an end cap 133. The first part 131 passes through the electronic compartment base 10 and the electronic compartment 11, and one end of the first part 131 is electrically connected to the circuit board assembly 12. One end of the second part 132 is connected to the other end of the first part 131, and the second part 132 is a flexible part. The end cap 133 is located at the other end of the second part 132.

[0087] It should be noted that the first part 131 is the rigid part of the measuring rod 13, and the second part 132 is the flexible part of the measuring rod 13. By setting at least a portion of the measuring rod 13 as a flexible part, under curved assembly conditions, the measuring rod 13 can be bent into the desired shape to achieve step-by-step assembly along the curved trajectory.

[0088] In some embodiments, the second part 132 may have a lower hardness than the first part 131. The first part 131 is the rigid part of the measuring rod 13, and the second part 132 is the flexible part of the measuring rod 13.

[0089] In some embodiments, the first part 131 (rigid rod part) is optionally fixedly connected to the electronic compartment 11 by welding.

[0090] In some embodiments, the second part 132 (flexible rod portion) is optionally fixedly connected to the first part 131 by welding.

[0091] In some embodiments, the end cap 133 and the second part 132 are optionally fixedly connected by welding.

[0092] In some embodiments, the maximum bendable angle of the second part 132 is optionally not less than 90 degrees.

[0093] Optionally, the first part 131 passes through the second mounting hole 1123 of the electronic compartment base 10 and the electronic compartment 11. Optionally, the outer wall of the first part 131 is connected to the hole wall of the second mounting hole 1123.

[0094] In one specific embodiment, the outer wall of the first part 131 and the wall of the second mounting hole 1123 are fixed relative to each other by welding.

[0095] In some embodiments, optionally, such as Figure 6 As shown, the electronic compartment base 10 is provided with a third mounting hole 106, which is connected to the mounting groove 103. The measuring rod 13 passes through the third mounting hole 106 and the electronic compartment 11.

[0096] By providing the third mounting hole 106, firstly, the measuring rod 13 can pass through to ensure that the measuring rod 13 can be connected to the circuit board assembly 12 inside the electronic compartment 11; secondly, a pressure-resistant outer tube 16 can be installed when necessary to meet the pressure resistance requirements in some measurement scenarios.

[0097] In one specific embodiment, the probe 13 passes through the third mounting hole 106 and the second mounting hole 1123, and one end of the probe 13 can be electrically connected to the sensitive element 122 of the circuit board assembly 12.

[0098] In some embodiments, optionally, such as Figure 3 and Figure 7 As shown, the magnetostrictive displacement sensor 1 also includes a pressure-resistant outer tube 16. At least a portion of the pressure-resistant outer tube 16 is disposed within the third mounting hole 106, and the pressure-resistant outer tube 16 is sleeved on the measuring rod 13.

[0099] To meet the pressure resistance requirements in some measurement scenarios, a pressure-resistant outer tube 16 needs to be installed to protect the measuring rod 13 from pressure, thereby improving the service life of the magnetostrictive displacement sensor 1.

[0100] It should be noted that the third mounting hole 106 is a reserved mounting hole for the optional (optional installation or not, which can be flexibly set according to actual needs) pressure-resistant outer tube 16.

[0101] When the pressure-resistant outer tube 16 is installed, the pressure-resistant outer tube 16 is fixedly connected to the third mounting hole 106 by welding.

[0102] Under the condition of arc-shaped assembly, the pressure-resistant outer tube 16 is not installed. In this case, the flexible rod part of the measuring rod 13 needs to be bent into the required shape to achieve step-by-step assembly along the curved trajectory.

[0103] In some embodiments, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the electronic compartment base 10 includes a third part 101 and a fourth part 102 connected together. A third mounting hole 106 is provided in the third part 101, and a mounting groove 103 and a first mounting hole 104 are provided in the fourth part 102.

[0104] By optimizing the structure of the electronic compartment base 10, the overall structure can be made more compact and easier to assemble and disassemble.

[0105] The outer wall of the third part 101 is provided with mounting threads 107.

[0106] By setting the installation thread 107, a threaded connection can be achieved between the electronic compartment base 10 and the cylinder body 20, which makes it convenient for staff to disassemble and assemble the electronic compartment base 10, and facilitates maintenance or replacement.

[0107] Workers fix the electronic compartment base 10 to the cylinder 20 by installing the thread 107. By loosening the clamping part 14, the electronic compartment 11 and measuring rod 13 of the magnetostrictive displacement sensor 1 can be directly pulled out, so as to disassemble and assemble the magnetostrictive displacement sensor 1 in a confined space.

[0108] The outer wall of the third part 101 is also provided with a second placement groove 108, which is used to place the second seal 152.

[0109] By setting the second seal 152, it is beneficial to improve the sealing performance between the electronic compartment base 10 and the cylinder 20 when they are in the connected state, so as to achieve a sealed connection between the two.

[0110] In some embodiments, the third part 101 and the fourth part 102 are optionally integrated structures, that is, the electronic compartment base 10 is an integral structure. Compared with post-processing methods (such as welding or bonding), it has better mechanical properties and higher connection strength, which helps to reduce the number of parts and improve assembly efficiency.

[0111] In one specific embodiment, the second seal 152 is an O-ring.

[0112] In some embodiments, optionally, such as Figure 1 , Figure 2 , Figure 3 and Figure 9 As shown, the magnetostrictive displacement sensor 1 also includes a ring magnet 171. The ring magnet 171 is sleeved on the measuring rod 13 and is used to connect with the piston 22 of the hydraulic cylinder 2. The piston 22 is used to drive the ring magnet 171 to move relative to the measuring rod 13.

[0113] The annular magnet 171 moves with the piston 22. The sensing element 122 detects the change in relative position between the annular magnet 171 and the measuring rod 13, and transmits the displacement signal to the signal board 124. The signal board 124 converts the displacement signal into an electrical signal and transmits it to the power supply board 126. The power supply board 126 feeds back the electrical signal to the external data center via the male connector 182. The external data center determines the movement position of the piston 22 based on the electrical signal.

[0114] In some embodiments, optionally, such as Figure 1 , Figure 2 , Figure 3 and Figure 9 As shown, the magnetostrictive displacement sensor 1 also includes a non-magnetic pad 172. At least a portion of the non-magnetic pad 172 is disposed between the annular magnet 171 and the piston 22 to isolate the annular magnet 171 and the piston 22 and avoid interference with the magnetic signal transmitted by the annular magnet 171.

[0115] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0116] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0117] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0118] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetostrictive displacement sensor, characterized in that, include: Electronic compartment base (10); The electronic compartment (11) is detachably connected to the electronic compartment base (10); A circuit board assembly (12) is disposed within the electronic compartment (11); A probe (13) is inserted through the electronic compartment base (10) and the electronic compartment (11), and the probe (13) is electrically connected to the circuit board assembly (12); The electronic compartment base (10) is provided with a mounting groove (103) and at least one first mounting hole (104), the first mounting hole (104) communicating with the mounting groove (103); at least a portion of the electronic compartment (11) is disposed in the mounting groove (103); The magnetostrictive displacement sensor further includes: At least one clamping member (14) is provided, each clamping member (14) being inserted into a corresponding first mounting hole (104), the clamping member (14) being used to abut against the outer wall of the electronic compartment (11) to achieve a detachable connection between the electronic compartment (11) and the electronic compartment base (10).

2. The magnetostrictive displacement sensor according to claim 1, characterized in that, The electronic storage unit (11) includes: Main body (111); A connecting part (112) is connected to the main body part (111). The connecting part (112) is located in the mounting groove (103). A second mounting hole (1123) is provided on the connecting part (112). The circuit board assembly (12) is located inside the main body (111), the clamping member (14) is used to abut against the outer wall of the connecting part (112), and the measuring rod (13) passes through the electronic compartment base (10) and the second mounting hole (1123).

3. The magnetostrictive displacement sensor according to claim 2, characterized in that, The connecting part (112) is shaped like a frustum or a pyramid, and the connecting part (112) has a small end (1121) and a large end (1122) opposite to each other. The small end (1121) is used to connect with the main body (111), and the large end (1122) is used to abut against the groove wall of the mounting groove (103); When the electronic compartment (11) and the electronic compartment base (10) are connected, the end face of the clamping member (14) abuts against the outer wall surface of the connecting part (112).

4. The magnetostrictive displacement sensor according to claim 3, characterized in that, The mounting groove (103) has a first placement groove (105) on its groove wall; The magnetostrictive displacement sensor further includes: A first seal (151) is disposed in the first placement groove (105) and is used to abut against the large end (1122).

5. The magnetostrictive displacement sensor according to claim 2, characterized in that, The main body (111) has a chamfered structure (1111) at one end near the connecting part (112).

6. The magnetostrictive displacement sensor according to any one of claims 1 to 5, characterized in that, The measuring rod (13) includes: The first part (131) is disposed in the electronic compartment base (10) and the electronic compartment (11), and one end of the first part (131) is electrically connected to the circuit board assembly (12); The second part (132) is connected at one end to the other end of the first part (131), and the second part (132) is a flexible part; End cap (133) is located at the other end of the second part (132).

7. The magnetostrictive displacement sensor according to any one of claims 1 to 5, characterized in that, The electronic compartment base (10) is provided with a third mounting hole (106), which is connected to the mounting groove (103). The measuring rod (13) passes through the third mounting hole (106) and the electronic compartment (11).

8. The magnetostrictive displacement sensor according to claim 7, characterized in that, Also includes: A pressure-resistant outer tube (16) is provided in the third mounting hole (106) at least a portion thereof, and the pressure-resistant outer tube (16) is sleeved on the measuring rod (13).

9. The magnetostrictive displacement sensor according to claim 7, characterized in that, The electronic compartment base (10) includes a third part (101) and a fourth part (102) connected together. The third mounting hole (106) is provided in the third part (101), and the mounting groove (103) and the first mounting hole (104) are provided in the fourth part (102). The outer wall of the third part (101) is provided with mounting threads (107). The outer wall of the third part (101) is also provided with a second placement groove (108), which is used to place the second sealing element (152).

10. The magnetostrictive displacement sensor according to any one of claims 1 to 5, characterized in that, Also includes: A ring magnet (171) is sleeved on the measuring rod (13), and the ring magnet (171) is used to connect with the piston (22) of the hydraulic cylinder (2); The piston (22) is used to drive the annular magnet (171) to move relative to the measuring rod (13).

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