Contact for synchronous detection of pin shrinkage and conduction of aviation electric connector

Abstract

The invention discloses a contact for synchronous detection of pin shrinkage and conduction of an aviation electric connector, which comprises a shell, a measuring piece is axially and movably arranged in the shell, the measuring piece extends out of the shell from a first end of the shell, an inductance type displacement sensing device is arranged at a second end of the shell, and the inductance type displacement sensing device is connected with the measuring piece. One end, close to the inductive displacement sensing device, of the measuring piece is provided with a magnetic piece, and the magnetic piece moves along with the measuring piece so as to realize electromagnetic induction with the inductive displacement sensing device; the inductive displacement sensing device is connected with a circuit interface, and the circuit interface is used for being connected with an external measuring circuit; according to the invention, the pin shrinkage inspection and the single-circuit conduction relation inspection of the contact element of the electric connector, which are originally performed in a time-sharing manner, are synchronously performed, so that the time required for inspection is remarkably shortened, and the working efficiency is improved. The method has good applicability under the working condition that single-contact pin shrinkage inspection and single-circuit conduction inspection are needed.

Description

Technical Field

[0001] The invention belongs to the technical field of electromechanical component detection, and in particular relates to a contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector. Background Art

[0002] During the manufacturing, installation, and maintenance of aviation wiring harnesses, electrical connectors require mechanical inspection for contact pin or hole shrinkage, as well as electrical inspection for correct circuit continuity. Currently, this inspection involves applying axial pressure to the pin or hole using a retention tool, or manually stretching the wire connected to the contact on the other side to verify that the contact is securely installed within the connector. Currently, there are two methods for checking circuit continuity. One is manual self-test, which uses two contacts connected to the contacts at each end of the wire. An indicator device, such as a multimeter with a beeping function, is used within the test circuit to indicate correct continuity. This method offers high flexibility and is suitable for onboard or targeted inspections. The other is automated continuity system testing, which uses automated testing equipment to perform a full circuit continuity test on the entire wiring harness assembly. This method is highly efficient and suitable for batch inspections.

[0003] In conventional production, wiring harness circuit continuity checks can be performed using a continuity system, significantly improving production efficiency. For electrical connector contact pin shrinkage or hole shrinkage inspections, existing technical solutions have proposed replacing manual single-contact inspections with automatic inspections or multi-contact parallel inspections to improve inspection efficiency. However, in some operating conditions, such as on-machine installation of electrical connectors, on-site maintenance, and manufacturing for missing parts, the automatic inspection method of the continuity system is not suitable for circuit continuity inspections. Automatic inspections or multi-contact parallel inspections are also not suitable for electrical connector contact pin shrinkage or hole shrinkage inspections. Traditional manual pin shrinkage or hole shrinkage inspections, as well as circuit continuity inspections performed one circuit at a time, are the only options.

[0004] Currently, the inspection of electrical connector contacts for pin or hole shrinkage and single-circuit continuity under these conditions are performed independently, consuming significant manpower and time, resulting in low efficiency. This can lead to even greater adverse effects in emergency situations, such as wiring harness repairs or emergency maintenance.

[0005] Therefore, to address the problem in the prior art that electrical connectors cannot be tested for conduction and pin reduction simultaneously, the present invention provides a contact for simultaneous detection of pin reduction and conduction of aviation electrical connectors. Summary of the Invention

[0006] The present invention discloses a contact for synchronous detection of pin reduction and conduction of aviation electrical connectors. Based on this, the pin reduction inspection of electrical connector contacts and the single circuit conduction relationship inspection, which were originally carried out in time, can be carried out simultaneously, significantly reducing the time required for electrical connector inspection.

[0007] The present invention is achieved through the following technical solutions: A contact for synchronous detection of pin retraction and conduction of an aviation electrical connector, comprising a housing, a measuring member disposed axially within the housing, the measuring member extending from a first end of the housing to the exterior of the housing, an inductive displacement sensing device disposed at a second end of the housing, a magnetic member disposed at one end of the measuring member proximate the inductive displacement sensing device, the magnetic member accompanying the movement of the measuring member to achieve electromagnetic induction with the inductive displacement sensing device; the inductive displacement sensing device being connected to a circuit interface, the circuit interface being configured to connect to an external measurement circuit, the external measurement circuit comprising a circuit for pin retraction detection and another circuit for conduction detection.

[0008] One end of the measuring member, extending outside the housing, contacts the object under test. By pressing the measuring member to apply pressure to the object under test, the measuring member moves within the housing under the reaction force, thereby driving the magnetic member at the second end to move relative to the inductive displacement sensor, thereby generating a differential voltage within the inductive displacement sensor. If the object under test does not experience needle retraction, the measuring member, under the action of a set external force, can move a fixed stroke, thereby driving a predetermined relative displacement between the magnetic member and the inductive displacement sensor, ultimately generating a desired differential voltage through the inductive displacement sensor. This differential voltage can be monitored and read by an external measurement circuit connected to the circuit interface, thereby performing a needle retraction test on the object under test. Simultaneously, the object under test, the conductive contact portion, the continuity test connection, the circuit interface, and the external measurement circuit form a loop. The external measurement circuit can monitor and determine whether the loop is conductive, thereby achieving simultaneous needle retraction and continuity testing of the object under test.

[0009] In order to better implement the present invention, further, an elastic member is provided between the measuring member and the inductive displacement sensor device, and the elastic member is elastically deformed along with the movement of the measuring member.

[0010] In order to better realize the present invention, further, the measuring part includes a measuring rod, a conductivity test wire, and a fixed conductivity wiring board. The measuring rod is coaxially movable and designed to be inside the shell. The first end of the measuring rod extends to the outside of the shell, and the second end of the measuring rod is provided with a magnetic part; the fixed conductivity wiring board is connected to the circuit interface, and a through hole that slides with the measuring rod is provided at the center of the fixed conductivity wiring board. The conductivity test wire is used to connect the fixed conductivity wiring board and the first end of the measuring rod.

[0011] In order to better implement the present invention, further, the first end of the measuring rod is provided with a conductive contact portion extending to the outside of the shell, an insulating partition is provided between the conductive contact portion and the measuring rod, the conductivity test line is used to connect the fixed conductivity wiring board and the conductive contact portion, and an elastic member is provided between the insulating partition and the fixed conductivity wiring board.

[0012] In order to better implement the present invention, further, a probe mounting bracket is provided at the first end of the shell, and an inner cavity for sliding and fitting the conductive contact part is provided at the center of the probe mounting bracket, and one end of the conductive test line extends into the inner cavity and contacts and connects with the conductive contact part.

[0013] In order to better implement the present invention, further, the elastic member includes an elastic member body, the elastic member body is arranged between the insulating partition and the fixed conductive wiring board, and the elastic member body generates elastic deformation along with the movement of the measuring rod.

[0014] In order to better implement the present invention, further, a guide cylinder is provided on the outside of the elastic member body, and the elastic member body is connected to the guide cylinder in a sliding fit.

[0015] In order to better realize the present invention, further, the inductive displacement sensing device includes a sensing coil and a shrinkage test wire. The sensing coil is arranged at the second end of the shell, the sensing coil is connected to the circuit interface through the shrinkage test wire, and the sensing coil is electromagnetically inductively coupled to the magnetic part.

[0016] In order to better implement the present invention, further, a sensor mounting bracket is provided inside the second end of the shell, a sensor coil is provided at the end of the sensor mounting bracket away from the measuring piece, and the end of the sensor mounting bracket close to the measuring piece is connected to a fixed conductive wiring board.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention synchronizes the electrical connector contact shrinkage inspection and single circuit continuity inspection, which were originally performed in separate time periods, significantly reducing the inspection time and improving work efficiency. It has good applicability in working conditions requiring single contact shrinkage inspection and single circuit continuity inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the contact for synchronous detection; Figure 2 This is a schematic diagram of the installation of the measuring piece; Figure 3 This is a schematic diagram of the installation of an inductive displacement sensor device; Figure 4 Schematic diagram of the installation of elastic parts.

[0019] Among them: 1-conductive contact part; 2-insulating partition; 3-measuring rod; 4-conductivity test connection line; 5-circuit interface; 6-elastic part body; 7-guide cylinder; 8-fixed conduction terminal block; 9-magnetic part; 10-sensing coil; 11-sensor mounting bracket; 12-shrinkage test line; 13-probe mounting bracket; 14-shell. DETAILED DESCRIPTION

[0020] Example 1: The embodiment of the present invention is a contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector, such as Figures 1-4 As shown, it includes a shell 14, a measuring piece is axially movable inside the shell 14, the measuring piece extends from the first end of the shell 14 to the outside of the shell 14, and an inductive displacement sensing device is provided at the second end of the shell 14. A magnetic piece 9 is provided at one end of the measuring piece close to the inductive displacement sensing device, and the magnetic piece 9 moves with the measuring piece to realize electromagnetic induction with the inductive displacement sensing device; the inductive displacement sensing device includes a circuit interface 5, and the circuit interface 5 is used to connect to an external measurement circuit.

[0021] When the magnetic member 9 moves with the measuring member, it will be displaced relative to the inductive displacement sensor device. Through electromagnetic induction, a differential voltage is generated within the inductive displacement sensor device. The differential voltage can be monitored and read by an external measurement circuit connected to the circuit interface 5. Whether a differential voltage is generated and how the differential voltage changes can be used to determine whether the device under test has experienced pin shrinkage. At the same time, the conductive contact portion 1 is in electrical contact with the device under test and forms a loop with the conduction test connection 4, the fixed conduction terminal block 8, the circuit interface 5, and the external measurement circuit. The external measurement circuit can monitor and read the on / off state of the device under test and determine whether the device under test is in the on state. Specifically: A predetermined external force is applied to the measuring member, causing its first end to contact the DUT. At this point, the measuring member (i.e., the sensing coil 10), the DUT (i.e., the retraction test lead 12), and the circuit interface 5 are connected to the external measurement circuit to form a loop. If the DUT does not retract, applying the predetermined external force will cause the measuring member to produce a predetermined displacement driven by the reaction force, thereby driving the magnetic member 9 to move a predetermined distance relative to the inductive displacement sensor. This generates a predetermined differential voltage in the inductive displacement sensor. This differential voltage is monitored and read by the external measurement circuit to perform a retraction test on the DUT. Simultaneously, the conductive contact portion 1 forms stable electrical contact with the DUT in the absence of retraction, forming a complete loop with the continuity test lead 4, the fixed continuity terminal block 8, the circuit interface 5, and the external measurement circuit. A test current is applied via the external measurement circuit's current source, and the DUT's disconnection or continuity state is determined within the loop, thereby simultaneously performing both retraction and continuity tests on the DUT.

[0022] If the test piece experiences pin shrinkage, applying a predetermined external force to the measuring piece will cause the measuring piece to not produce the predetermined displacement due to pin shrinkage at the contact point between the test piece and the measuring piece. This, in turn, prevents the magnetic member 9 from moving relative to the inductive displacement sensor through the predetermined travel distance, ultimately causing the differential voltage generated within the inductive displacement sensor to fall short of the expected value. The differential voltage is monitored by an external detection circuit. If the difference between the monitored differential voltage and the expected value exceeds the allowable error threshold, this indicates that the test piece is experiencing pin shrinkage.

[0023] Example 2: This embodiment discloses a contact for synchronous detection of pin reduction and conduction of an aviation electrical connector, which is further optimized based on the first embodiment. Figures 1-4 As shown, an elastic member is provided between the measuring member and the inductive displacement sensor device, and the elastic member is elastically deformed along with the movement of the measuring member.

[0024] The elastic member applies a spring force to the measuring member. When an external force is applied to the measuring member, the spring force overcomes the elastic member, allowing the measuring member to move smoothly within the housing 14 while simultaneously deforming. When the external force is removed, the measuring member rebounds under the elastic force of the elastic member, allowing for the next test of the member under test. The elastic force of the elastic member is preset. When a predetermined external force is applied to the measuring member, the elastic member compresses by a predetermined amount, which corresponds to the predetermined displacement of the measuring rod.

[0025] Furthermore, the elastic member includes an elastic member body 6, which is disposed between the insulating partition 2 and the fixed conductive terminal block 8. The elastic member body 6 elastically deforms in response to the movement of the measuring rod 3. A guide cylinder 7 is disposed externally to the elastic member body 6, with the elastic member body 6 and the guide cylinder 7 being slidably connected. The inner wall of the guide cylinder 7 slidably contacts the elastic member body 6. When the elastic member body 6 is compressed, the guide cylinder 7 guides the compressed movement of the elastic member body 6, ensuring smooth movement of the elastic member body 6 and the measuring member.

[0026] The rest of this embodiment is the same as that of embodiment 1, so it will not be described again.

[0027] Example 3: This embodiment discloses a contact for synchronous detection of pin reduction and conduction of an aviation electrical connector, which is further optimized on the basis of embodiment 1 or 2, such as Figure 3 As shown, the measuring part includes a measuring rod 3, a conductivity test line 4, and a fixed conductivity wiring board 8. The measuring rod 3 is coaxially movable and designed to be inside the shell 14. The first end of the measuring rod 3 extends to the outside of the shell 14. The second end of the measuring rod 3 is provided with a magnetic part 9; the fixed conductivity wiring board 8 is connected to the circuit interface 5, and a through hole that slides with the measuring rod 3 is provided at the center of the fixed conductivity wiring board 8. The conductivity test line 4 is used to connect the fixed conductivity wiring board 8 and the first end of the measuring rod 3.

[0028] Applying a predetermined external force to the measuring rod 3 causes it to move within the housing 14. This movement, in turn, causes the magnetic element 9 to move relative to the inductive displacement sensor, generating a differential voltage within the sensor. The external detection circuit forms a loop through the circuit interface 5, the sensing coil 10, and the reduced-needle test lead 12, allowing the differential voltage within the sensor to be monitored.

[0029] Furthermore, the first end of the measuring rod 3 is provided with a conductive contact part 1 extending to the outside of the shell 14, an insulating partition 2 is provided between the conductive contact part 1 and the measuring rod 3, and the conductivity test line 4 is used to connect the fixed conductivity wiring board 8 and the conductive contact part 1, and an elastic member is provided between the insulating partition 2 and the fixed conductivity wiring board 8.

[0030] The conductive contact portion 1 is made of a copper alloy, which offers excellent electrical conductivity and rigidity, making it less susceptible to deformation during frequent contact and compression with the test piece. An insulating spacer 2 is provided between the conductive contact portion 1 and the measuring rod 3, providing insulation between the conductive contact portion 1 and the elastic member.

[0031] Furthermore, a probe mounting bracket 13 is provided at the first end of the shell 14, and an inner cavity for sliding and fitting the conductive contact part 1 is provided at the center of the probe mounting bracket 13, and one end of the conductive test line 4 extends into the inner cavity and contacts and connects with the conductive contact part 1.

[0032] The rest of this embodiment is the same as that of embodiment 1 or 2, and thus will not be described in detail.

[0033] Example 4: This embodiment discloses a contact for synchronous detection of pin reduction and conduction of an aviation electrical connector, which is further optimized based on any one of the embodiments 1-3, such as Figure 3 As shown, the inductive displacement sensing device includes a sensing coil 10 and a pin reduction test line 12. The sensing coil 10 is disposed at the second end of the housing 14 and is connected to the circuit interface 5 via the pin reduction test line 12. The sensing coil 10 and the magnetic member 9 are subjected to electromagnetic induction. The magnetic member 9 is disposed within the hollow cavity of the sensing coil 10. When the magnetic member 9 moves relative to the sensing coil 10 under the drive of the measuring rod 3, a differential voltage is generated within the sensing coil 10. Through the pin reduction test line 12 connected to the circuit interface 5, an external detection circuit can be connected to monitor the differential voltage generated within the sensing coil 10.

[0034] Furthermore, a sensor mounting bracket 11 is disposed within the second end of the housing 14. A sensor coil 10 is disposed on the end of the sensor mounting bracket 11 away from the measured object, and the end of the sensor mounting bracket 11 closer to the measured object is connected to the fixed conductive wiring board 8. The sensor mounting bracket 11 is made of an insulating material, such as rubber or ceramic. The sensor mounting bracket 11 supports and secures the sensor coil 10, while also providing insulation between the sensor coil 10 and the fixed conductive wiring board 8.

[0035] The rest of this embodiment is the same as any one of Embodiments 1-3, so it will not be described again.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A contact for synchronous detection of pin reduction and conduction of an aviation electrical connector, comprising a housing (14), characterized in that: A measuring piece is provided inside the housing (14) for axial movement. The measuring piece extends from a first end of the housing (14) to the outside of the housing (14). An inductive displacement sensing device is provided at a second end of the housing (14). A magnetic piece (9) is provided at one end of the measuring piece close to the inductive displacement sensing device. The magnetic piece (9) moves with the measuring piece to achieve electromagnetic induction with the inductive displacement sensing device. The inductive displacement sensing device is connected to a circuit interface (5), and the circuit interface (5) is used to connect to an external measuring circuit.

2. A contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector according to claim 1, characterized in that: An elastic member is provided between the measuring member and the inductive displacement sensor device, and the elastic member is elastically deformed as the measuring member moves.

3. The contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector according to claim 2, characterized in that: The measuring component comprises a measuring rod (3), a conduction test connection line (4), and a fixed conduction wiring board (8); the measuring rod (3) is coaxially movable and designed to be inside a housing (14); the first end of the measuring rod (3) extends to the outside of the housing (14); and the second end of the measuring rod (3) is provided with a magnetic member (9); the fixed conduction wiring board (8) is connected to the circuit interface (5), and a through hole for slidingly matching with the measuring rod (3) is provided at the center of the fixed conduction wiring board (8); and the conduction test connection line (4) is used to connect the fixed conduction wiring board (8) and the first end of the measuring rod (3).

4. The contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector according to claim 3, characterized in that: The first end of the measuring rod (3) is provided with a conductive contact portion (1) extending to the outside of the housing (14), an insulating partition (2) is provided between the conductive contact portion (1) and the measuring rod (3), the conductive test connection line (4) is used to connect the fixed conductive wiring board (8) and the conductive contact portion (1), and an elastic member is provided between the insulating partition (2) and the fixed conductive wiring board (8).

5. The contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector according to claim 4, characterized in that: A probe mounting frame (13) is provided at the first end of the housing (14), an inner cavity for slidingly fitting the conductive contact portion (1) is provided at the center of the probe mounting frame (13), and one end of the conduction test wire (4) extends into the inner cavity and contacts and connects with the conductive contact portion (1).

6. The contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector according to claim 5, characterized in that: The elastic member comprises an elastic member body (6), the elastic member body (6) is arranged between the insulating partition (2) and the fixed conductive wiring board (8), and the elastic member body (6) generates elastic deformation as the measuring rod (3) moves.

7. The contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector according to claim 6, characterized in that: A guide cylinder (7) is provided outside the elastic member body (6), and the elastic member body (6) is connected to the guide cylinder (7) in a sliding manner.

8. A contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector according to any one of claims 3 to 7, characterized in that: The inductive displacement sensing device comprises a sensing coil (10) and a needle shrinkage test line (12); the sensing coil (10) is arranged at the second end of the housing (14); the sensing coil (10) is connected to the circuit interface (5) via the needle shrinkage test line (12); and the sensing coil (10) and the magnetic component (9) are electromagnetically inductively coupled.

9. The contact for synchronous detection of pin shrinkage and conduction of an aviation electrical connector according to claim 8, characterized in that: A sensor mounting frame (11) is provided inside the second end of the housing (14), a sensing coil (10) is provided at an end of the sensor mounting frame (11) away from the measuring piece, and an end of the sensor mounting frame (11) close to the measuring piece is connected to a fixed conductive wiring board (8).

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