Anti-interference magnetic resonance position sensor

Abstract

The utility model discloses an anti-interference magnetic resonance position sensor, and aims to solve the problems that the existing position sensor uses a plurality of strands of cables, when the transmission distance is long, the anti-interference capability is poor, the resolution ratio is low, the transmission signal is unstable, and the use requirements of users cannot be met. The position sensor comprises a sensor stator main body and a transmission cable, the sensor stator main body is provided with a wire hole, one end of the transmission cable is connected with the sensor stator main body, the other end of the sensor stator main body penetrates through the wire hole, and the transmission cable comprises six wire cores. According to the utility model, the transmission cable of the sensor stator main body adopts a coaxial design, and the shielding layer is arranged outside the wire cores, so that the sensor stator has high magnetic permeability and good magnetic shielding effect, signal interference among the wire cores can be prevented, and the transmission cable has the advantages of high interference resistance, high resolution and stable signal transmission.

Description

Technical Field

[0001] The utility model belongs to the technical field of position sensors, and in particular relates to an anti-interference magnetic resonance position sensor. Background Art

[0002] A resolver / transformer (resolver / transformer), also known as a resolver, is an electromagnetic resonant position sensor used to measure the angular displacement and angular velocity of a rotating object. It consists of a stator and a rotor. Due to its simple structure, sensitive operation, reliable operation, low environmental requirements (especially in high-temperature and high-dust environments), large output signal amplitude, and strong anti-interference ability, it is widely used in servo control systems, robotic systems, automobiles and other fields.

[0003] Most existing position sensors use multi-strand cables, which need to be bundled and fixed after installation. This is not only cumbersome to operate, but also difficult to transmit signals over long distances. When the transmission distance is long, there are problems such as poor anti-interference ability, low resolution, and unstable transmission signals, which cannot meet user needs. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide an interference-resistant magnetic resonance position sensor, which aims to solve the problem that the existing position sensors use multiple cables, have poor anti-interference ability, low resolution, and unstable transmission signals when the transmission distance is long, and cannot meet user needs.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the utility model provides an anti-interference magnetic resonance position sensor, which includes a sensor stator body and a transmission cable. A wire hole is opened on the sensor stator body, one end of the transmission cable is connected to the sensor stator body, and the other end of the sensor stator body passes through the wire hole. The transmission cable includes six wire cores, and the outer surfaces of the six wire cores are wrapped with an insulating layer and a shielding layer, and the outer surface of the shielding layer is wrapped with a filling layer and a sheath layer.

[0008] Preferably, the insulating layer is made of PTFE, and the shielding layer is woven from copper wire, aluminum wire or tinned copper wire.

[0009] Furthermore, the filling layer is made of high-density polyethylene material, and the interior of the high-density polyethylene material is filled with aluminum powder.

[0010] Furthermore, the filling layer is inlaid with reinforcing wires, and the reinforcing wires are made of nylon.

[0011] Furthermore, the sheath layer is a polyvinyl chloride sheath.

[0012] Furthermore, a threaded barrel is fixedly connected to the upper surface of the sensor stator body at the wire hole by screws. The diameter of the threaded barrel is larger than the diameter of the wire hole. A sealing ring made of rubber is provided inside the threaded barrel. The top end of the threaded barrel is threadedly connected to a hollow plug. The transmission cable is located inside the sealing ring and the plug.

[0013] Furthermore, the upper surface edge of the sealing ring is also provided with a beveled edge, and the inner wall of the bottom end of the plug is a conical structure.

[0014] Beneficial effects

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model passes the transmission cable through the blocking ring, the plug and the wire hole, and then connects it to the terminal on the stator body of the sensor, and then screws the plug to the threaded barrel. At this time, the plug is rotated to move toward the bottom of the threaded barrel. Since the inner wall of the bottom end of the plug is a tapered structure, the bevel on the blocking ring will be squeezed. The blocking ring will be deformed after being squeezed. The deformation of the blocking ring can seal the gap between the transmission cable and the wire hole, thereby preventing the interior of the stator body of the sensor from being damp or dust from entering, thereby improving the service life.

[0017] The utility model adopts a coaxial design for the transmission cable of the sensor stator body and embeds reinforcing wires inside, so that it has certain mechanical strength and hardness, improves the tensile strength, and extends the service life of the wire. At the same time, a shielding layer is provided on the outside of the conductor core to give it high magnetic permeability and a good magnetic shielding effect, which can prevent signal interference between the conductor cores, and make the transmission cable have the advantages of high anti-interference, high resolution and stable signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the utility model.

[0019] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model.

[0020] Figure 3 This utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the transmission cable of the present utility model.

[0022] The marks in the accompanying drawings are: 1. Sensor stator body; 2. Transmission cable; 3. Wire hole; 4. Wire core; 5. Insulation layer; 6. Shielding layer; 7. Filling layer; 8. Sheath layer; 9. Threaded barrel; 10. Sealing ring; 11. Plug; 12. Bevel; 701, Reinforcement wire; 13. Screw. DETAILED DESCRIPTION

[0023] This specific embodiment is an anti-interference magnetic resonance position sensor, and its structural diagram is shown in FIG. Figure 1-Figure 4 As shown, the position sensor includes a sensor stator body 1 and a transmission cable 2. A wire hole 3 is opened on the sensor stator body 1. One end of the transmission cable 2 is connected to the sensor stator body 1, and the other end of the sensor stator body 1 passes through the wire hole 3. The transmission cable 2 includes six conductor cores 4. The outer surfaces of the six conductor cores 4 are wrapped with an insulating layer 5 and a shielding layer 6. The outer surface of the shielding layer 6 is wrapped with a filling layer 7 and a sheath layer 8. There are six conductor cores 4, and one conductor core 4 is arranged in the center. The other five conductor cores 4 are evenly arranged on the outer periphery of the conductor core 4 at the center position. The conductor core 4 is made of bare copper monofilament or twisted into multiple wires.

[0024] In this embodiment, the insulating layer 5 is made of PTFE, and the shielding layer 6 is woven from copper wire, aluminum wire or tinned copper wire. This arrangement makes it have high magnetic permeability and good magnetic shielding effect, which can be used to resist low-frequency interference and better meet the user's usage needs.

[0025] In this embodiment, the filling layer 7 is made of high-density polyethylene material, and the interior of the high-density polyethylene material is filled with aluminum powder. This setting of filling the interior with aluminum powder can also have magnetic permeability, so that the shielding density can reach 90% or above, and the magnetic shielding effect is better.

[0026] like Figure 1 and Figure 4 As shown: In this embodiment, the filling layer 7 is embedded with reinforcing wires 701, and the reinforcing wires 701 are made of nylon.

[0027] This arrangement gives it a certain mechanical strength and hardness, improves tensile strength, and extends the service life of the wire.

[0028] like Figure 1 and Figure 4 As shown: In this embodiment, the sheath layer 8 is a polyvinyl chloride sheath. This arrangement can maintain the stability of the internal cable even in a high temperature, high humidity, and high corrosion environment, and has a simple structure and light weight, ensuring reliable operation of the line.

[0029] like Figure 2 and Figure 3As shown: In this embodiment, a threaded barrel 9 is fixedly connected to the upper surface of the sensor stator body 1 at the wire hole 3 by a screw 13. The diameter of the threaded barrel 9 is larger than the diameter of the wire hole 3. A sealing ring 10 made of rubber is provided inside the threaded barrel 9. The top of the threaded barrel 9 is threadedly connected to a hollow plug 11. The transmission cable 2 is located inside the sealing ring 10 and the plug 11. The upper surface edge of the sealing ring 10 also has a bevel 12, and the inner wall of the bottom end of the plug 11 is a conical structure.

[0030] In this way, the rotating plug 11 is moved toward the bottom of the threaded barrel 9. Since the inner wall of the bottom end of the plug 11 is a conical structure, the bevel 12 on the sealing ring 10 will be squeezed at this time. After being squeezed, the sealing ring 10 will be deformed, and the gap between the transmission cable 2 and the wire hole 3 is sealed by the deformation of the sealing ring 10.

[0031] Working principle: When in use, pass the transmission cable 2 through the sealing ring 10, the plug 11 and the wire hole 3, and then connect it to the terminal on the sensor stator body 1, and then thread the plug 11 to the threaded barrel 9. At this time, rotate the plug 11 to move toward the bottom of the threaded barrel 9. Since the inner wall of the bottom end of the plug 11 is a conical structure, the bevel 12 on the sealing ring 10 will be squeezed at this time. The sealing ring 10 will be deformed after being squeezed, and the deformation of the sealing ring 10 is used to seal the gap between the transmission cable 2 and the wire hole 3, thereby preventing the interior of the sensor stator body 1 from being damp or dust from entering, thereby improving the service life. By adopting a coaxial design for the transmission cable 2 of the sensor stator body 1 and inlaying a reinforcing wire 701 inside, it has certain mechanical strength and hardness, and the tensile strength is improved, which extends the service life of the wire. At the same time, a shielding layer 6 is provided on the outside of the conductor core 4, which has high magnetic permeability and a good magnetic shielding effect, which can prevent signal interference between the conductor cores 4.

[0032] All technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. An anti-interference magnetic resonance position sensor, comprising a sensor stator body (1) and a transmission cable (2), characterized in that: A wire hole (3) is provided on the sensor stator body (1); one end of the transmission cable (2) is connected to the sensor stator body (1); the other end of the sensor stator body (1) passes through the wire hole (3); the transmission cable (2) includes six conductor cores (4); the outer surfaces of the six conductor cores (4) are each wrapped with an insulating layer (5) and a shielding layer (6); and the outer surface of the shielding layer (6) is wrapped with a filling layer (7) and a sheath layer (8).

2. The interference-resistant magnetic resonance position sensor according to claim 1, characterized in that: The insulating layer (5) is made of PTFE, and the shielding layer (6) is woven from copper wires, aluminum wires, or tinned copper wires.

3. The interference-resistant magnetic resonance position sensor according to claim 2, characterized in that: The filling layer (7) is made of high-density polyethylene material, and the interior of the high-density polyethylene material is filled with aluminum powder.

4. The interference-resistant magnetic resonance position sensor according to claim 3, characterized in that: The filling layer (7) is embedded with reinforcing wires (701) which are made of nylon.

5. The interference-resistant magnetic resonance position sensor according to claim 4, characterized in that: The sheath layer (8) is a polyvinyl chloride sheath.

6. The interference-resistant magnetic resonance position sensor according to claim 1, characterized in that: A threaded barrel (9) is fixedly connected to the upper surface of the sensor stator body (1) at the wire hole (3) by a screw (13); the diameter of the threaded barrel (9) is larger than the diameter of the wire hole (3); a rubber sealing ring (10) is provided inside the threaded barrel (9); a hollow plug (11) is threadedly connected to the top end of the threaded barrel (9); and the transmission cable (2) is located inside the sealing ring (10) and the plug (11).

7. The interference-resistant magnetic resonance position sensor according to claim 6, characterized in that: The upper surface edge of the sealing ring (10) is also provided with a bevel (12), and the inner wall of the bottom end of the plug (11) is a conical structure.

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