Displacement sensor based on magnetic induction

Abstract

The utility model discloses a displacement sensor based on magnetic induction, which relates to the technical field of displacement sensor equipment and comprises a mounting frame, a first connector, a magnetic induction assembly, a magnetic strip, a second connector and a socket. According to the utility model, the mounting frame is used for mounting and supporting the displacement sensor, during use, the second connector is inserted into the socket of the first connector, then the mounting frame is adjusted to be parallel and aligned with the notch, and then the mounting frame is fixedly mounted on the surface of an oil cylinder, an air cylinder or other linear driving parts by using screws, so that the operation is convenient and fast; the magnetic induction assembly induces the magnetic field of the magnetic strip and collects the magnetic field intensity value, and high-sensitivity measurement of displacement is achieved through the change of the magnetic field intensity. The aligning and locking effects of the first connector and the second connector can be effectively improved, the angle adjustment of the mounting frame is not affected after the outer tooth-shaped connecting sleeve is connected with the tooth-shaped groove, and the mounting convenience of the sensor is ensured.

Description

Technical Field

[0001] This utility model relates to the field of displacement sensor equipment technology, specifically a displacement sensor based on magnetic induction. Background Technology

[0002] Displacement sensors, also known as linear sensors, are a type of linear device that uses metal induction. The function of a sensor is to convert various measured physical quantities into electrical quantities.

[0003] Patent (CN114812367B) discloses a non-contact external magnetic induction linear displacement measurement method. When the stroke device is driven by an external force, a magnetically driven moving component inside the casing of the stroke device moves linearly, causing at least two magnets of different polarities mounted on the moving component to move and generate a changing magnetic field. An external displacement sensor is set outside the casing of the stroke device, sensing the magnetic field and acquiring the magnetic field strength value through an internal magnetic induction chip array. The signal of the magnetic induction chip array is cyclically sampled, and the displacement data is calculated based on the sampled data. The calculated displacement data is then converted into an electrical signal and output. This method enables non-contact displacement measurement external to the outer wall of the cylinder, and has the advantages of convenient installation and disassembly, high-precision measurement, high-stability and high-reliability data output, compact and exquisite structure, maintenance-free operation, and applicability to various complex environments. It can be widely used in the field of linear displacement detection.

[0004] The displacement sensor described in the aforementioned patent is inconvenient to connect with hydraulic cylinders, pneumatic cylinders, or other linear drive components, making the installation of the magnetic induction displacement sensor quite cumbersome. Summary of the Invention

[0005] The purpose of this invention is to provide a displacement sensor based on magnetic induction to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a displacement sensor based on magnetic induction, including a mounting frame and a second connector. The mounting frame has a first connector that is slidably connected inside, and a magnetic induction component that is movably connected on the inner wall of the mounting frame. A magnetic strip is provided on the outer wall of the first connector near the magnetic induction component. The magnetic strip has at least one S pole and one N pole. A socket that matches the second connector is provided on the other side of the outer wall of the first connector.

[0007] Furthermore, the surface of the mounting frame is provided with a through groove that matches the first connector, and several mounting holes are symmetrically provided at both ends of the outer wall of the mounting frame.

[0008] Furthermore, the second connector is fixedly connected to the output end of the external device, the outer wall of the second connector is fitted with an external toothed connecting sleeve, the inner wall of the socket is provided with a toothed groove that matches the external toothed connecting sleeve, and the socket is rotatably connected to the first connector.

[0009] Furthermore, the magnetic induction component includes a mounting strip, the outer wall of which is provided with a plurality of induction chips, and the inner wall of the mounting frame is provided with a slot that matches the mounting strip.

[0010] Furthermore, the inner wall of the mounting frame is provided with a guide rod, the first connector is slidably connected to the guide rod, and the guide rod is parallel to the mounting strip.

[0011] Furthermore, one end of the inner wall of the mounting frame is provided with an elastic buckle assembly on the outside of the slot, and the elastic buckle assembly is engaged with the mounting strip.

[0012] Furthermore, the elastic buckle assembly includes two buckles, which are respectively disposed on both sides of the slot. A spring is provided at the end of the outer wall of the buckle away from the slot. The end of the spring away from the buckle is fixedly connected to the inner wall of the mounting frame. A support strip is provided on the outer wall of the spring near the buckle. The support strip extends to the outside of the mounting frame. A groove matching the buckle is opened on the outer wall of the mounting strip.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] 1. This utility model comprises an installation frame, a first connector, a magnetic induction component, a magnetic strip, a second connector, and a socket. The installation frame supports the displacement sensor. The second connector is pre-fixed to an external device (the piston rod of a hydraulic cylinder or pneumatic cylinder, or other moving parts of a linear drive component). The surface of the hydraulic cylinder, pneumatic cylinder, or other linear drive component also has a slot for the second connector to move. In use, simply align the first connector and the second connector of the installation frame, insert the second connector into the socket of the first connector, adjust the installation frame to be parallel and aligned with the slot, and then fix the installation frame to the surface of the hydraulic cylinder, pneumatic cylinder, or other linear drive component using screws. The operation is convenient and quick. The magnetic induction component senses the magnetic field of the magnetic strip and collects the magnetic field strength value, achieving high-sensitivity displacement measurement through changes in magnetic field strength. This effectively improves the alignment and locking effect of the first and second connectors and enhances the stability of their connection. The connection between the external toothed connecting sleeve and the toothed groove does not affect the angle adjustment of the installation frame, ensuring convenient sensor installation.

[0015] 2. In this utility model, the two support bars are first stretched outwards, causing the two buckles to move outwards. The spring is compressed, and the buckles move out of the slot. Then, the mounting strip is inserted into the slot between the two support bars. After the mounting strip is fully inserted into the slot, the support bars are released, the spring rebounds, and the spring pushes the buckles inwards into the slot. The buckles enter the groove on the surface of the mounting strip, thus achieving the snap-fit ​​fixation between the elastic buckle assembly and the mounting strip. The operation is convenient and quick. For disassembly, simply stretch the two support bars outwards, remove the buckles from the groove of the mounting strip, release the fixing state of the mounting strip, and then pull the mounting strip outwards to disassemble the mounting strip. The operation is convenient and quick. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a structural schematic diagram of the entire utility model from another angle;

[0019] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a utility model Figure 2 Front sectional view of the mounting frame;

[0021] Figure 5 This is a utility model Figure 4 Enlarged view of point B in the middle;

[0022] In the diagram: 1. Mounting frame; 101. Through groove; 102. Mounting hole; 103. Slot; 104. Guide rod; 105. Elastic snap-fit ​​assembly; 106. Snap-fit; 107. Spring; 108. Support bar; 2. First connector; 3. Magnetic induction assembly; 301. Mounting bar; 302. Induction chip; 303. Slot; 4. Magnetic strip; 5. Second connector; 501. External toothed connector sleeve; 6. Socket; 601. Toothed groove. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1-5 This utility model provides a technical solution: a displacement sensor based on magnetic induction, including a mounting frame 1 and a second connector 5. The mounting frame 1 has a horizontally slidably connected first connector 2 inside. The inner wall of the mounting frame 1 has a movably connected magnetic induction component 3. The outer wall of the first connector 2, near the magnetic induction component 3, has a magnetic strip 4, which has at least one S pole and one N pole. The other side of the outer wall of the first connector 2 has a socket 6 that matches the second connector 5. The second connector 5 is fixedly connected to the output end of an external device. The outer wall of the second connector 5 is fitted with an external toothed connecting sleeve 501. The inner wall of the socket 6 has a toothed groove 601 that matches the external toothed connecting sleeve 501. The socket 6 is rotatably connected to the first connector 2.

[0025] In one embodiment, the surface of the mounting frame 1 is provided with a through groove 101 that matches the first connector 2, and a plurality of mounting holes 102 are symmetrically provided at both ends of the outer wall of the mounting frame 1. The through groove 101 provides a movement channel for the first connector 2 and the second connector 5 on the surface of the mounting frame 1, ensuring that the second connector 5 can normally drive the first connector 2 to perform linear movement.

[0026] In one embodiment, the magnetic induction component 3 includes a mounting strip 301. The outer wall of the mounting strip 301 is provided with a plurality of induction chips 302. The inner wall of the mounting frame 1 is provided with a slot 103 that matches the mounting strip 301. The mounting strip 301 provides an installation position for the induction chips 302. By inserting the mounting strip 301 into the slot 103 of the mounting frame 1, all induction chips 302 can be quickly installed and removed. The operation is convenient and quick. Multiple magnetic induction chips 302 form a magnetic induction chip array. During operation, the magnetic magnetic field signal on the magnetic strip 4 is detected by the magnetic induction chip 302 and converted into linear displacement data. The specific data acquisition and conversion method can adopt the same principle as the comparative document in the background technology, or it can adopt the working principle of other magnetic induction displacement sensors.

[0027] In one embodiment, the inner wall of the mounting frame 1 is provided with a guide rod 104, the first connector 2 is slidably connected to the guide rod 104, the guide rod 104 is parallel to the mounting strip 301, and the guide rod 104 slides to guide the first connector 2, which can effectively ensure the safety and stability of the movement of the first connector 2.

[0028] In one embodiment, an elastic buckle assembly 105 is provided at one end of the inner wall of the mounting frame 1 on the outside of the slot 103. The elastic buckle assembly 105 is engaged with the mounting strip 301. The mounting strip 301 can be quickly engaged and fixed through the elastic buckle assembly 105, and the mounting strip 301 can also be quickly disassembled.

[0029] In one embodiment, the elastic buckle assembly 105 includes two buckles 106, which are respectively disposed on both sides of the slot 103. A spring 107 is provided at the end of the outer wall of each buckle 106 away from the slot 103. The end of the spring 107 away from the buckle 106 is fixedly connected to the inner wall of the mounting frame 1. A support strip 108 is provided on the outer wall of the spring 107 near the buckle 106, extending to the outside of the mounting frame 1. A groove 303 matching the buckle 106 is provided on the outer wall of the mounting strip 301. In use, the two support strips 108 are first spread outwards, causing the two buckles 106 to move outwards. The spring 107 is compressed, and the buckles 106 move out of the slot 103. Then, insert the mounting strip 301 into the slot 103 between the two support strips 108. After the mounting strip 301 is fully inserted into the slot 103, release the support strips 108, and the spring 107 will rebound. The spring 107 will push the buckle 106 into the slot 103, and the buckle 106 will enter the slot 303 on the surface of the mounting strip 301, thereby achieving the snap-fit ​​fixation between the elastic buckle assembly 105 and the mounting strip 301. The operation is convenient and quick. When disassembling, simply push the two support strips 108 outward, and the buckle 106 will move out of the slot 303 of the mounting strip 301, releasing the fixing state of the mounting strip 301. Then, pull the mounting strip 301 outward to disassemble the mounting strip 301. The operation is convenient and quick.

[0030] The working principle of this utility model:

[0031] Refer to the instruction manual appendix Figures 1-5 This utility model consists of an installation frame 1, a first connector 2, a magnetic induction component 3, a magnetic strip 4, a second connector 5, and a socket 6. The installation frame 1 supports the displacement sensor. The second connector 5 is pre-fixed to an external device (the piston rod of a hydraulic cylinder or pneumatic cylinder, or other moving parts of a linear drive component). The surface of the hydraulic cylinder, pneumatic cylinder, or other linear drive component also has a slot for the second connector 5 to move. In use, simply align the first connector 2 and the second connector 5 of the installation frame 1, insert the second connector 5 into the socket 6 of the first connector 2, adjust the installation frame 1 to be parallel and aligned with the slot, and then fix the installation frame 1 to the surface of the hydraulic cylinder, pneumatic cylinder, or other linear drive component with screws. The operation is convenient and quick.

[0032] When the linear drive component moves linearly, the linear drive component drives the second connector 5 to move linearly. The second connector 5 drives the magnetic strip 4 to move horizontally through the first connector 2. The S pole and one N pole on the surface of the magnetic strip 4 are displaced. The magnetic induction component 3 senses the magnetic field of the magnetic strip 4 and collects the magnetic field strength value. The displacement is measured with high sensitivity by the change in magnetic field strength. The specific measurement principle adopts the same measurement principle as the comparative document in the background technology.

[0033] An external toothed connecting sleeve 501 is provided on the outer wall of the second connector 5, and a toothed groove 601 for the external toothed connecting sleeve 501 is provided on the inner wall of the socket 6. When the second connector 5 is inserted into the socket 6 of the first connector 2, the external toothed connecting sleeve 501 is inserted into the toothed groove 601, which can effectively improve the alignment and locking effect of the first connector 2 and the second connector 5, and enhance the stability of the connection between the first connector 2 and the second connector 5. The socket 6 is rotatably connected to the first connector 2, so that the external toothed connecting sleeve 501 and the toothed groove 601 can be quickly aligned and inserted. After the external toothed connecting sleeve 501 and the toothed groove 601 are connected, it will not affect the angle adjustment of the mounting frame 1, ensuring the convenience of sensor installation.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A displacement sensor based on magnetic induction, comprising a mounting frame (1) and a second connector (5), characterized in that: The mounting frame (1) has a first connector (2) that is slidably connected inside. The inner wall of the mounting frame (1) has a magnetic induction component (3) that is movably connected. The outer wall of the first connector (2) has a magnetic strip (4) on the side close to the magnetic induction component (3). The magnetic strip (4) has at least one S pole and one N pole. The other side of the outer wall of the first connector (2) has a socket (6) that matches the second connector (5).

2. A magnetic-induction based displacement sensor according to claim 1, wherein: The mounting frame (1) has a through groove (101) on its surface that matches the first connector (2), and a number of mounting holes (102) are symmetrically provided at both ends of the outer wall of the mounting frame (1).

3. A magnetic-induction based displacement sensor according to claim 1, wherein: The second connector (5) is fixedly connected to the output end of the external device. The outer wall of the second connector (5) is fitted with an external toothed connector sleeve (501). The inner wall of the socket (6) is provided with a toothed groove (601) that matches the external toothed connector sleeve (501). The socket (6) is rotatably connected to the first connector (2).

4. The magnetic-induction based displacement sensor of claim 1, wherein: The magnetic induction component (3) includes a mounting strip (301), the outer wall of which is provided with a plurality of induction chips (302), and the inner wall of the mounting frame (1) is provided with a slot (103) that matches the mounting strip (301).

5. A displacement sensor based on magnetic induction according to claim 4, characterized in that: The inner wall of the mounting frame (1) is provided with a guide rod (104), the first connector (2) is slidably connected to the guide rod (104), and the guide rod (104) is parallel to the mounting strip (301).

6. A displacement sensor based on magnetic induction according to claim 4, characterized in that: One end of the inner wall of the mounting frame (1) is provided with an elastic buckle assembly (105) on the outside of the slot (103), and the elastic buckle assembly (105) is engaged with the mounting strip (301).

7. A displacement sensor based on magnetic induction according to claim 6, characterized in that: The elastic buckle assembly (105) includes two buckles (106), which are respectively located on both sides of the slot (103). A spring (107) is provided at the end of the outer wall of the buckle (106) away from the slot (103). The end of the spring (107) away from the buckle (106) is fixedly connected to the inner wall of the mounting frame (1). A support strip (108) is provided on the outer wall of the spring (107) near the buckle (106). The support strip (108) extends to the outside of the mounting frame (1). The outer wall of the mounting strip (301) is provided with a slot (303) that matches the buckle (106).

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