Sensor cable protection device and method

Abstract

A kind of sensor cable protection device and protection method, sensor tail has annular boss and sensor cable, cable shield sleeve and cable protection sleeve are sleeved on the outside of sensor cable, shield sleeve and protection sleeve are connected and fixed with sensor tail by a cable protection joint, cable protection joint is connected and fixed by left-right symmetry piece by binding belt, completely meet the protection and electromagnetic protection requirement of aircraft electrical circuit interconnection system design to sensor cable, its structure is simple and reliable.

Description

Technical Field

[0001] This invention relates to the field of aircraft electrical wiring interconnection system design, specifically a sensor cable protection device and protection method. Background Technology

[0002] Sensors are primarily used to detect the displacement of objects and have wide applications in aviation, aerospace technology, and industrial production. Sensors typically come with their own cables, and aircraft landing gear proximity sensors are often installed in harsh environments. The aircraft electrical wiring interconnect system, also known as the EWIS system, requires careful consideration of sensor cable protection and electromagnetic interference shielding during its design.

[0003] Traditionally, heat-shrink tubing was used to connect and secure sensors and their cables to cable protection sleeves and shielding sleeves to protect the sensor cables and provide electromagnetic shielding. However, aircraft EWIS system design has high protection requirements for landing gear proximity sensor cables, and heat-shrink tubing suffers from poor stability, poor environmental adaptability, and poor operability (requiring on-board heat-shrinking operation). With the continuous improvement of aircraft EWIS system design, it is imperative to design a standard protective device suitable for aircraft landing gear proximity sensor cables. Summary of the Invention

[0004] The purpose of this application is to provide a sensor cable protection device and method to meet the protection requirements for landing gear cables in aircraft EWIS system design and reduce unnecessary onboard operations. This method is particularly suitable for the protection of aircraft landing gear proximity sensor cables.

[0005] A sensor cable protection device includes an annular boss and a sensor cable at the tail of the sensor. A cable shielding sleeve and a cable protection sleeve are sleeved on the outside of the sensor cable. The device is characterized in that the shielding sleeve and the protection sleeve are connected and fixed to the tail of the sensor by a cable protection connector.

[0006] The cable protection connector is a stepped tubular connector composed of symmetrical left and right parts. The cable protection connector contains three steps, and each step has an annular binding groove on its outer side. The inner diameter of the first step matches the tail of the sensor, and the inner wall of the first step has an annular groove that matches the protrusion at the tail of the sensor and is limited by the protrusion at the tail of the sensor. The outer diameter of the second step matches the cable protection sleeve, and the end of the cable protection sleeve can be fitted into the annular binding groove on the outer side of the second step. The outer diameter of the third step matches the cable shielding sleeve, and the end of the cable shielding sleeve can be fitted into the annular binding groove on the outer side of the third step.

[0007] This application also proposes a sensor cable protection method, characterized by the following: 1) using the aforementioned sensor cable protection device; 2) binding the cable protection connector, which is composed of symmetrical left and right parts, to the tail of the sensor with a cable tie, the cable tie being embedded in the annular binding groove on the outside of the first-stage stepped tube, so that the annular boss at the tail of the sensor is engaged with the annular groove in the first-stage stepped tube, and a U-shaped annular rubber sealing gasket is located between the boss and the annular groove in the first-stage stepped tube; 3) flaring the end of the cable shielding sleeve and fitting it to the outside of the third-stage stepped tube, then binding the end of the cable shielding sleeve to the outer diameter of the third-stage stepped tube with a cable tie, the cable tie being embedded in the annular binding groove on the outside of the third-stage stepped tube; 4) finally flaring the end of the cable protection sleeve and fitting it to the outside of the second-stage stepped tube, binding the end of the cable shielding sleeve to the outer diameter of the second-stage stepped tube with a cable tie, the cable tie being embedded in the annular binding groove on the outside of the second-stage stepped tube.

[0008] The beneficial effects of this application are as follows: 1) This invention connects the cable shielding sleeve and the cable protection sleeve to the sensor tail end through a cable protection connector. The cable protection connector is made up of symmetrical left and right parts connected and fixed by cable ties, which fully meets the protection and electromagnetic protection requirements of the EWIS system design for the sensor cable. Its structure is simple and reliable. 2) This invention places a rubber pad between the cable protection connector and the convex ring of the sensor for anti-wear protection between the cable protection connector and the sensor, and improves water resistance and environmental adaptability. 3) This invention only uses cable ties as fixing parts, does not involve complicated on-machine operation procedures, and is highly operable.

[0009] The present application will be further described in detail below with reference to the accompanying drawings of the embodiments. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the assembly relationship of the sensor cable protection device.

[0011] Figure 2 This is a structural diagram of a symmetrical cable protection connector assembly.

[0012] Figure 3 This is a schematic diagram of the symmetrical components of a rubber sealing gasket assembly.

[0013] Figure 4 This is a schematic diagram of a sensor cable protection method.

[0014] Figure 5 This is a schematic diagram showing the protection status of the sensor cable.

[0015] The numbers in the diagram are explained as follows: 1. Sensor tail, 2. Boss, 3. Sensor cable, 4. Cable shielding sleeve, 5. Cable protection sleeve, 6. Cable protection connector, 7. Rubber sealing gasket, 8. Cable tie, 9. First-stage step tube, 10. Second-stage step tube, 11. Third-stage step tube, 12. Annular groove. Detailed Implementation

[0016] Referring to the attached figures, the sensor cable protection device proposed in this application has an annular boss 2 and a sensor cable 3 at the sensor tail 1. A cable shielding sleeve 4 and a cable protection sleeve 5 are sleeved on the outside of the sensor cable 3. This application connects and fixes the shielding sleeve 4 and the protection sleeve 5 to the sensor tail 1 through a cable protection connector 6.

[0017] The cable protection connector 6 in implementation is a stepped tubular connector composed of symmetrical left and right parts. The cable protection connector 6 contains three steps, and each step tube has an annular binding groove on its outer side. The inner diameter of the first step tube 9 matches the tail of the sensor 1, and the inner wall of the first step tube 9 is provided with an annular groove 12, which matches the tail boss 2 of the sensor and is limited by the tail boss. The outer diameter of the second step tube 10 matches the cable protection sleeve 5. The end of the cable protection sleeve 5 can be fitted into the annular binding groove on the outer side of the second step tube 10 after being flared. The outer diameter of the third step tube 11 matches the cable shielding sleeve 4. The end of the cable shielding sleeve 4 can be fitted into the annular binding groove on the outer side of the third step tube 11 after being flared.

[0018] In practice, to prevent wear between the cable protective connector and the sensor, and to prevent moisture from entering the cable protective sleeve 5, a U-shaped annular rubber sealing gasket 7 is embedded in the annular groove 12 on the inner wall of the first-stage stepped pipe 9. This annular rubber sealing gasket 7 is also assembled and connected by symmetrical left and right parts. The U-shaped cross-section of the annular rubber sealing gasket 7 matches the protrusion 2 at the tail of the sensor.

[0019] The embodiment uses the aforementioned sensor cable protection device to protect the aircraft landing gear proximity sensor cable. The specific procedure is as follows: The cable protection connector 6, composed of symmetrical left and right components, is bundled and connected to the tail of the aircraft landing gear proximity sensor using cable ties 8. The cable ties 8 are embedded in the annular binding groove on the outside of the first-stage stepped tube 9, so that the annular boss 2 at the tail of the sensor engages with the annular groove 12 inside the first-stage stepped tube 9. The U-shaped annular rubber sealing gasket 7 is located between the boss 2 and the annular groove 12 inside the first-stage stepped tube 9; the cable shielding sleeve 4... After the end is flared, it is fitted into the annular binding groove on the outside of the third-stage stepped pipe 11. Then, the end of the cable shielding sleeve 4 is bound together with the outer diameter of the third-stage stepped pipe 11 using binding tape 8. The binding tape 8 is embedded in the annular binding groove on the outside of the third-stage stepped pipe 11. Finally, the end of the cable protection sleeve 5 is flared and fitted into the annular binding groove on the outside of the second-stage stepped pipe 10. The end of the cable shielding sleeve 5 is bound together with the outer diameter of the second-stage stepped pipe 10 using binding tape 8. The binding tape 8 is embedded in the annular binding groove on the outside of the second-stage stepped pipe 10.

Claims

1. A sensor cable protection device, comprising an annular boss and a sensor cable at the tail end of the sensor, wherein a cable shielding sleeve and a cable protective sleeve are sleeved on the outside of the sensor cable, characterized in that, The shielding sleeve and protective sleeve are connected and fixed to the sensor tail via a cable protection connector. The cable protection connector is a stepped tubular connector composed of symmetrical left and right parts. The cable protection connector contains three steps, and each step tube has an annular binding groove on its outer side. The inner diameter of the first step tube matches the sensor tail, and the inner wall of the first step tube has an annular groove that matches the boss at the sensor tail and is limited by the boss at the sensor tail. The outer diameter of the second step tube matches the cable protective sleeve, and the end of the cable protective sleeve can be fitted into the annular binding groove on the outer side of the second step tube after being flared. The outer diameter of the third step tube matches the cable shielding sleeve, and the end of the cable shielding sleeve can be fitted into the annular binding groove on the outer side of the third step tube after being flared.

2. The sensor cable protection device as described in claim 1, characterized in that, An annular rubber gasket with a U-shaped cross-section is embedded in the annular groove on the inner wall of the first-stage stepped pipe. The annular rubber gasket is assembled and connected by left and right symmetrical parts.

3. A method for protecting sensor cables, characterized in that... The device includes the following: 1) using the sensor cable protection device as described in claim 1 or 2; 2) connecting the cable protection connector of the left and right symmetrical parts to the tail of the sensor by binding with cable ties, the cable ties being embedded in the annular binding groove on the outside of the first-stage stepped tube, so that the annular boss at the tail of the sensor is engaged with the annular groove in the first-stage stepped tube, and the U-shaped annular rubber sealing gasket is located between the boss and the annular groove in the first-stage stepped tube; 3) flaring the end of the cable shielding sleeve and fitting it onto the outside of the third-stage stepped tube, and then binding the end of the cable shielding sleeve to the outer diameter of the third-stage stepped tube with cable ties, the cable ties being embedded in the annular binding groove on the outside of the third-stage stepped tube; 4) finally flaring the end of the cable protection sleeve and fitting it onto the outside of the second-stage stepped tube, and binding the end of the cable shielding sleeve to the outer diameter of the second-stage stepped tube with cable ties, the cable ties being embedded in the annular binding groove on the outside of the second-stage stepped tube.

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