Speed sensor cable based on Hall effect

Abstract

The invention relates to the field of sensor cables, in particular to a Hall effect-based speed sensor cable, which comprises conductors, an outer sheath, a protective hose and the like, the conductors are made of silver-plated copper and are twisted in pairs, an insulating layer is made of crosslinked polyethylene, and a composite shielding layer comprises an aluminum foil wrapping layer, a tinned copper woven mesh and a ferrite magnetic ring. The protective hose is made of a polyurethane material and is provided with a spiral structure, an anti-bending metal ring and a corrosion-resistant protective ring; the silver-plated copper conductors are twisted in pairs, so that the high-frequency signal transmission performance is improved, and the long-distance transmission attenuation is reduced; the composite shielding layer effectively resists electromagnetic interference; the service life of the cable is prolonged; the cross-linked polyethylene insulating layer, the polyurethane protective hose and the corrosion-resistant protective ring enable the cable to adapt to severe industrial environments and ensure stable operation in different temperatures and complex chemical environments.

Description

Technical Field

[0001] The present invention relates to the field of sensor cables, in particular to a speed sensor cable based on the Hall effect. Background Art

[0002] In the sensor cable field, with the rapid development of industrial automation and intelligentization, Hall-effect-based speed sensors are becoming increasingly widely used, and the performance requirements for their supporting cables are becoming increasingly stringent. However, traditional speed sensor cables have exposed numerous problems in actual use. Existing cable conductors fail to effectively mitigate the skin effect and electromagnetic interference, resulting in poor high-frequency signal transmission performance, high attenuation over long distances, unstable speed sensor signals, and a short service life.

[0003] Therefore, it is necessary to propose a speed sensor cable based on the Hall effect to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a speed sensor cable based on the Hall effect to solve the problems of being unable to effectively reduce the skin effect and reduce electromagnetic interference, resulting in poor high-frequency signal transmission performance, large attenuation in long-distance transmission, unstable speed sensor signals, and short service life.

[0005] To achieve the above object, the present invention provides the following technical solutions: A speed sensor cable based on the Hall effect, comprising a conductor, an outer sheath, and a protective hose, wherein the conductor is installed in the outer sheath, and both ends of the protective hose are connected to the outer sheath, and the characteristics are: there are multiple conductors, and the outer sides of the multiple conductors are wrapped with an insulating layer, and the multiple conductors are all arranged inside the outer sheath and the protective hose along the cable axis direction, the outer side of the insulating layer is wrapped with a composite shielding layer, the outer side of the composite shielding layer is wrapped with an aramid fiber braided layer, and the outer sheath is wrapped around the outer side of the aramid fiber braided layer, and the protective hose is a flexible curved tube, and a spiral structure is provided at a position near the two ports of the protective hose, and multiple groups of fixing grooves are provided at both ends of the interior of the protective hose, and anti-bending metal rings are connected in a clamping manner inside the fixing grooves, and the inner wall of the anti-bending metal ring is in close contact with the aramid fiber braided layer; Among them, the composite shielding layer includes an aluminum foil wrap, a tinned copper braided mesh, and a ferrite magnetic ring. The aluminum foil wrap is wrapped on the outside of the insulating layer, and a tinned copper braided mesh is installed on the outside of the aluminum foil wrap. A plurality of ferrite magnetic rings are installed at equal intervals on the outside of the tinned copper braided mesh, and the outside of the ferrite magnetic ring is tightly fitted with the aramid fiber braided layer.

[0006] Preferably, a rubber gasket is installed on the inner wall of the ferrite magnetic ring, and the inner side of the rubber gasket is tightly fitted on the tinned copper braided mesh.

[0007] Preferably, the conductor is made of silver-plated copper conductor, and every two conductors wrapped with the insulation layer are twisted together into a pair according to a preset lay length.

[0008] Preferably, the ferrite rings are installed at intervals of 50 cm.

[0009] Preferably, the insulating layer is made of cross-linked polyethylene.

[0010] Preferably, the coverage of the tinned copper braided mesh is ≥85%.

[0011] Preferably, the aluminum foil is wrapped evenly at an angle of 45°, and the coverage of the aluminum foil is ≥100%.

[0012] Preferably, the protective hose is made of polyurethane.

[0013] Preferably, the anti-bending metal ring is made of martensitic stainless steel.

[0014] Preferably, a plurality of corrosion-resistant protective rings are installed inside the protective hose.

[0015] Technical effects and advantages of the present invention: 1. Silver-plated copper conductors are twisted in pairs to reduce skin effect and signal transmission interference, improve high-frequency signal transmission performance, reduce long-distance transmission attenuation, ensure stable and accurate transmission of speed sensor signals, and improve measurement accuracy.

[0016] 2. The spiral structure of the protective hose port, the internal anti-bending metal ring and the aramid fiber braided layer work together. The spiral structure prevents cable fatigue fracture, the anti-bending metal ring prevents excessive bending, and the aramid fiber braided layer improves the overall strength, extends the service life of the cable and reduces maintenance costs.

[0017] 3. The aluminum foil wrapping in the composite shielding layer suppresses low-frequency interference, the tinned copper braid shields high-frequency noise, and the ferrite magnetic ring absorbs common-mode EMI, effectively resisting complex electromagnetic interference, ensuring that signal transmission is not affected by external electromagnetic interference, and improving the reliability of the cable in the electromagnetic environment.

[0018] 4. The insulation layer is made of cross-linked polyethylene with a temperature resistance range of -40℃~125℃, which can adapt to different temperature environments; the protective hose is made of polyurethane with a corrosion-resistant protective ring inside, which has good wear resistance, oil resistance and chemical corrosion resistance, ensuring the stable operation of the cable in harsh industrial environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the cable conductor structure of a speed sensor based on the Hall effect of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of the cable of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal spiral structure of the protective hose of the present invention.

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the protective hose of the present invention.

[0023] Figure 5 It is a schematic diagram of the installation structure of the rubber gasket and the ferrite ring of the present invention.

[0024] Figure 6 This is a schematic diagram of the structure of the tinned copper braided mesh of the present invention.

[0025] Figure 7 This is a schematic diagram of the aramid fiber braided layer structure of the present invention.

[0026] Figure 8 It is a schematic diagram of the aluminum foil wrapping structure of the present invention.

[0027] In the figure: 1. Conductor; 2. Outer sheath; 3. Insulation layer; 4. Composite shielding layer; 41. Aluminum foil wrapping; 42. Tinned copper braid; 43. Ferrite ring; 5. Protective hose; 51. Spiral structure; 52. Fixing groove; 53. Anti-bending metal ring; 6. Aramid fiber braid; 7. Rubber gasket. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The present invention provides Figure 1-8The Hall effect-based speed sensor cable shown includes a conductor 1, an outer sheath 2, and a protective hose 5. The conductor 1 is installed in the outer sheath 2, and both ends of the protective hose 5 are connected to the outer sheath 2. There are multiple conductors 1, and the outer sides of the multiple conductors 1 are wrapped with an insulating layer 3. The multiple conductors 1 are all arranged inside the outer sheath 2 and the protective hose 5 along the cable axis. The outer side of the insulating layer 3 is wrapped with a composite shielding layer 4, and the outer side of the composite shielding layer 4 is wrapped with an aramid fiber braided layer 6. The outer sheath 2 is wrapped around the outer side of the aramid fiber braided layer 6. The protective hose 5 is a flexible curved tube. A spiral structure 51 is provided near the two ports of the protective hose 5. The spiral structure 51 can prevent cable fatigue fracture. Multiple sets of fixing grooves 52 are provided at both ends of the protective hose 5. The fixing grooves 52 are connected with anti-bending metal rings 53 in a snap-fit ​​manner. The inner wall of the anti-bending metal ring 53 is tightly fitted with the aramid fiber braided layer 6. The tensile strength of the aramid fiber braided layer 6 is ≥200N / mm², which effectively improves the strength of the cable. Among them, the composite shielding layer 4 includes an aluminum foil wrap 41, a tinned copper braided mesh 42, and a ferrite magnetic ring 43. The aluminum foil wrap 41 is wrapped around the outside of the insulating layer 3, and the tinned copper braided mesh 42 is installed on the outside of the aluminum foil wrap 41. Multiple ferrite magnetic rings 43 are installed at equal intervals on the outside of the tinned copper braided mesh 42, and the outside of the ferrite magnetic ring 43 is tightly fitted with the aramid fiber braided layer 6.

[0030] Furthermore, a rubber gasket 7 is installed on the inner wall of the ferrite ring 43, and the inner side of the rubber gasket 7 is tightly fitted on the tinned copper braided mesh 42; Furthermore, the conductor 1 is made of silver-plated copper conductor, and every two conductors 1 wrapped with the insulating layer 3 are twisted together into a pair according to a preset lay length; Silver-plated copper conductors can reduce the skin effect, improve high-frequency signal transmission, and solve the problem of long-distance transmission attenuation.

[0031] Furthermore, the ferrite rings 43 are installed at intervals of 50 cm; The ferrite ring 43 is used to absorb common mode EMI, thereby solving the problem of electromagnetic interference sensitivity.

[0032] Furthermore, the material of the insulating layer 3 is cross-linked polyethylene, which has a temperature resistance range of -40°C to 125°C, solving the problem of insufficient temperature stability; Furthermore, the coverage of the tinned copper braided mesh 42 is ≥85% to shield high-frequency noise; Furthermore, the aluminum foil wrap 41 is evenly wrapped at an angle of 45°, and the coverage of the aluminum foil wrap 41 is ≥100%. The aluminum foil wrap 41 can suppress low-frequency interference; Furthermore, the material of the protective hose 5 is polyurethane; Furthermore, the anti-bending metal ring 53 is made of martensitic stainless steel; Furthermore, a plurality of corrosion-resistant protective rings are installed inside the protective hose 5; The use of silver-plated copper conductors can effectively reduce the skin effect. During long-distance transmission, the problem of high-frequency signal attenuation is significantly improved, ensuring stable and accurate signal transmission, and meeting the strict requirements of speed sensors for signal accuracy. The conductors are twisted into pairs at a preset lay length to further reduce electromagnetic interference in signal transmission and enhance the stability and reliability of signal transmission.

[0033] The aluminum foil wrapping coverage rate is ≥100%, which can effectively suppress low-frequency interference; the tinned copper braid coverage rate is ≥85%, which is responsible for shielding high-frequency noise; the ferrite magnetic rings installed at equal intervals of 50cm absorb common-mode EMI. The three work together to enable the cable to operate stably even in complex electromagnetic environments, ensuring that the speed sensor obtains accurate signals and reducing the impact of external electromagnetic interference on measurement accuracy.

[0034] The spiral structure at both ends of the protective hose effectively prevents fatigue fracture of the cable due to frequent bending, thereby extending the service life of the cable; the anti-bending metal ring is made of martensitic stainless steel and fits tightly with the aramid fiber braided layer, enhancing the overall bending resistance of the cable and protecting the internal structure from damage during bending.

[0035] The insulation layer is made of cross-linked polyethylene with a temperature resistance range of -40℃-125℃, which can adapt to a variety of complex environmental temperatures and ensure that the cable can work stably under different working conditions; the protective hose is made of polyurethane, which has good wear resistance, oil resistance and chemical corrosion resistance and can cope with harsh industrial environments; multiple corrosion-resistant protective rings installed inside further enhance the corrosion resistance of the cable and extend the service life of the cable in corrosive environments. Among them, the corrosion-resistant protective rings are not marked in the figure.

[0036] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A speed sensor cable based on the Hall effect, comprising a conductor (1), an outer sheath (2), and a protective hose (5), wherein the conductor (1) is installed in the outer sheath (2), and both ends of the protective hose (5) are connected to the outer sheath (2), characterized in that: There are multiple conductors (1), and the outer sides of multiple conductors (1) are all wrapped with insulating layers (3). Multiple conductors (1) are all arranged inside the outer sheath (2) and the protective hose (5) along the cable axis direction. The outer side of the insulating layer (3) is wrapped with a composite shielding layer (4), and the outer side of the composite shielding layer (4) is wrapped with an aramid fiber braided layer (6). The outer sheath (2) is wrapped around the outer side of the aramid fiber braided layer (6). The protective hose (5) is a flexible curved tube. The inner side of the protective hose (5) near the two ports is provided with a spiral structure (51). The inner ends of the protective hose (5) are provided with multiple sets of fixing grooves (52). The fixing grooves (52) are internally connected with anti-bending metal rings (53). The inner wall of the anti-bending metal ring (53) is tightly fitted with the aramid fiber braided layer (6). The composite shielding layer (4) includes an aluminum foil wrap (41), a tinned copper braided mesh (42), and a ferrite magnetic ring (43). The aluminum foil wrap (41) is wrapped around the outside of the insulating layer (3). The tinned copper braided mesh (42) is installed on the outside of the aluminum foil wrap (41). A plurality of ferrite magnetic rings (43) are installed at equal intervals on the outside of the tinned copper braided mesh (42). The outside of the ferrite magnetic ring (43) is tightly fitted with the aramid fiber braided layer (6).

2. The Hall effect-based speed sensor cable according to claim 1, characterized in that: A rubber gasket (7) is installed on the inner wall of the ferrite magnetic ring (43), and the inner side surface of the rubber gasket (7) is tightly fitted on the tinned copper braided mesh (42).

3. The Hall effect-based speed sensor cable according to claim 1, characterized in that: The conductor (1) is made of silver-plated copper conductor, and every two conductors (1) wrapped with the insulating layer (3) are twisted together to form a pair according to a preset twist pitch.

4. The Hall effect-based speed sensor cable according to claim 1, characterized in that: The ferrite magnetic rings (43) are installed at intervals of 50 cm.

5. The Hall effect-based speed sensor cable according to claim 1, characterized in that: The material of the insulating layer (3) is cross-linked polyethylene.

6. The Hall effect-based speed sensor cable according to claim 1, characterized in that: The coverage of the tinned copper braided mesh (42) is ≥85%.

7. The Hall effect-based speed sensor cable according to claim 1, characterized in that: The aluminum foil wrapping (41) is evenly wrapped at an angle of 45°, and the coverage of the aluminum foil wrapping (41) is ≥100%.

8. The Hall effect-based speed sensor cable according to claim 1, characterized in that: The material of the protective hose (5) is polyurethane.

9. The Hall effect-based speed sensor cable according to claim 1, characterized in that: The anti-bending metal ring (53) is made of martensitic stainless steel.

10. The Hall effect-based speed sensor cable according to claim 1, characterized in that: A plurality of corrosion-resistant protective rings are installed inside the protective hose (5).

Images