Universal multi-core connector for testing equipment detection and connection method

Abstract

The invention discloses a universal multi-core connector for testing equipment detection and a connection method. The universal multi-core connector comprises a testing tool, a butt joint mechanism and an air source. The testing tool comprises a box body, a movable connector and a detachable mother board, the movable connector is of a multi-signal compatible structure, multi-core contact assemblies are independently arranged in groups according to signal types, small and weak signal interfaces are designed with shielding, and the mother board is detachably matched with a tested circuit board. The docking mechanism comprises a movement mechanism, a fixed connector and a controller, the movement mechanism drives the test tool to translate along a guide rail through a cylinder, a guide pin is matched with a positioning half pin to realize accurate docking, and the controller forms closed-loop control through an MCU, an electromagnetic valve and a travel switch. According to the device, an instruction can be triggered manually or through test equipment, automatic butt joint and separation of the movable connector and the fixed connector are achieved, the device is adaptive to various tested circuit boards, the problems that a multi-core connector is difficult to plug manually and poor in adaptability are solved, stable transmission of multiple signals is guaranteed, and test efficiency and data reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a special connector for test and detection equipment, in particular to a universal multi-core connector for test equipment detection and a connection method. BACKGROUND

[0002] In the research and development, production and quality inspection links of electronic products, test equipment (such as oscilloscopes, spectrum analyzers, power supplies, etc.) is usually used to connect with the circuit board under test through the connector to complete the function, performance and reliability test. The performance of the test connector is directly related to the accuracy of the test data and the test efficiency. Therefore, electrical testing is widely used in modern equipment production and is one of the indispensable processes. In testing, test equipment is needed to test circuit boards or components. In order to reduce costs, the test equipment is usually designed as a universal test equipment, which can test multiple products, which leads to a large number of connector pins between the test equipment and the product under test, and the pin types are complex. Some connectors are even divided into multiple test function blocks, which leads to a very large plugging force of the connector. When replacing the product under test, manual plugging is basically impossible, and the efficiency is low. Frequent plugging and unplugging can also cause damage.

[0003] Therefore, the current test connection scheme widely used in this field mainly has the following shortcomings:

[0004] First, strong specialization and insufficient universality. Most existing test fixtures are customized for specific models of circuit boards under test. The interface definition, physical size and signal type of the connector are fixed and cannot be changed. When the circuit board under test is changed or its interface definition is adjusted, the entire test fixture becomes invalid and must be redesigned and manufactured. This not only leads to huge repeated investment costs, but also prolongs the product testing preparation cycle, which cannot adapt to the characteristics of modern electronic products with rapid iteration and multiple models.

[0005] Second, the connection process relies on manual operation, and the reliability and efficiency are low. Most fixtures require operators to manually connect multi-core connectors. This process has two major risks: first, manual operation cannot guarantee that the force and angle of each connection are completely consistent, which may cause physical damage to the connector pins, such as bending and breaking, reducing the service life of the connector; second, manual connection cannot guarantee the stability and consistency of electrical contact, which may introduce unstable contact resistance and affect the reliability of test results. At the same time, tedious manual operation also seriously restricts the test efficiency and cannot meet the high rhythm requirements of the automated production line.

[0006] Third, the signal integrity protection measures are insufficient. With the increasing integration of circuit boards, test signals are increasingly dense and diverse in type (such as micro-volt analog signals, high-speed digital signals, and large-current power signals coexisting in the same connector). The existing connector often does not optimize the isolation and shielding of different types of signals in the structural layout. The high and low speed signals, power and weak signal terminals are too close, which can easily cause signal crosstalk and electromagnetic interference, leading to test waveform distortion, reading drift, and inability to meet high-precision testing, especially in high-frequency and small-signal testing scenarios.

[0007] Fourth, the automation integration capability is weak. The existing test connection scheme usually does not have a standardized interface with the automation mechanism in the structure, and lacks unified propulsion, guidance and positioning reference. Therefore, it is difficult to be conveniently and reliably integrated into a fully automatic test system, hindering the improvement of the overall automation level of the production line.

[0008] Therefore, there is an urgent need for a new test connection technology scheme that can overcome the above-mentioned defects, which should have high universality and compatibility, be able to realize fast, reliable and accurate automatic docking, and effectively guarantee the test integrity in complex signal environment. SUMMARY

[0009] In view of the above problems, the present application provides a universal multi-core connector for test equipment detection and a connection method, which has the characteristics of universality and high compatibility, and has high docking accuracy and high stability during connection. Through the design of the movable connector and the fixed connector, a standard transfer docking interface that can be repeatedly plugged with the fixed plate is provided, and the connection line between the movable connector and the circuit board under test and the mother board can be replaced separately, at low cost and high efficiency, without affecting the plugging of the test equipment and the test cable. Thus, the automatic docking of multi-core or complex connectors is realized, and the automatic docking of the test equipment and the product under test during the test process is realized. This conversion and separation design makes the test system no longer need to redesign the entire interface for each new product, but only needs to customize the connection between the mother board and the movable connector, improving the expansibility, adaptability, practicality and efficiency of the system.

[0010] Specifically, the application is implemented as follows: a universal multi-core connector for testing equipment detection, comprising: a testing tool and a docking mechanism; the testing tool comprises a box body, a movable connector and a mother board, the movable connector is installed on the docking surface of the box body, and the mother board is arranged in the box body and connected with the movable connector and a circuit board to be tested respectively; the circuit board to be tested and the mother board are both installed in the box body in a detachable manner; the movable connector is a multi-signal compatible docking structure, which comprises a multi-core contact assembly for transmitting multiple types of test signals and a multi-core contact docking part adapted to the interface requirements of different circuit boards to be tested; the multi-core contact assembly can simultaneously carry at least two test signals; the docking mechanism comprises a motion mechanism, a fixed connector and a controller; the controller is connected to the motion mechanism, the motion mechanism is drivingly connected to the box body and can drive the box body to translate to approach the fixed connector under the control of the controller, the fixed connector is provided with a docking structure corresponding to the multi-core contact docking part and the multi-core contact assembly of the movable connector, and after docking, the movable connector can be connected with the fixed connector through the multi-core contact docking part and the multi-core contact assembly, so that the docking between the fixed connector and the circuit board to be tested is realized; the other side of the fixed connector is a test cable, which is connected with the testing equipment; the multi-core contact assembly and the multi-core contact docking part on the movable connector penetrate through both sides of the movable connector and are made of insulating material, and different types of signal contact terminals, pin and socket are independently grouped and arranged; wherein the shielded interfaces of the small and weak signal contact holes are distributed on both sides of the movable connector in groups, the power signal interface group is located in the middle of the movable connector, and the conventional signal interface group is located below the power signal interface group, and each group protrudes outward as a whole.

[0011] Further, the motion mechanism comprises a base plate, a fixed block, a guide rail assembly, a fixed plate, a connecting rod and a gas cylinder, wherein: the fixed block is fixed on one end of the base plate, and the fixed connector is installed on the fixed block; the guide rail assembly comprises a guide rail seat, a fixed guide rail and a sliding block, the guide rail seat is fixed on the base plate, the fixed guide rail is installed on the guide rail seat, and the sliding block and the fixed guide rail constitute a kinematic pair, and the fixed plate is fixed on the sliding block; the testing tool is installed on the fixed plate; the gas cylinder is installed on the base plate, and the push rod thereof is connected with the fixed plate through the connecting rod; the testing tool can be pushed to move along the guide rail assembly, so that the multi-core contact assembly and / or the multi-core contact docking part are in translational docking connection or pulled out and separated from the fixed connector on the fixed block.

[0012] Further, the front end face of the box body is provided with a plurality of guide holes, and the butt joint face of the fixing block on the opposite face of the box body is provided with guide pins matched with the number and position of the guide holes; so that the guide pins can be inserted into the guide holes during butt joint, and the fixed connector and the movable connector are guided to butt joint; a plurality of protruding positioning half pins are arranged at the middle part of the butt joint face of the movable connector; a plurality of positioning slots matched with the positioning half pins are arranged at the corresponding positions of the butt joint face of the fixed connector; and the number, position and depth of the positioning slots are matched with the positioning half pins.

[0013] Further, the controller comprises a pneumatic assembly and an electrical controller, the pneumatic assembly comprises a pressure regulating valve, a one-way valve, an advancing electromagnetic valve, a retreating electromagnetic valve, an advancing regulating valve and a retreating electromagnetic valve, and the electrical controller comprises an MCU, an advancing button, a retreating button, an emergency stop button, a travel switch, a back travel switch and a relay; the gas source is connected with the air inlet end of the controller to provide power for the cylinder; the cylinder advancing end air inlet hole is connected with the cylinder retreating end air inlet hole; the travel switch is installed at the advancing end of the cylinder, and the back travel switch is installed at the retreating end of the cylinder, and both are connected with the MCU.

[0014] Further, the electrical controller further comprises a first non-contact electromagnetic switch and a second non-contact electromagnetic switch, which are connected with the MCU respectively to detect the advancing and retreating positions of the cylinder piston; the relay comprises a first relay and a second relay, which are connected with the MCU, the advancing electromagnetic valve and the retreating electromagnetic valve respectively; and the pneumatic assembly further comprises a two-position three-way electromagnetic valve arranged at the middle position to realize the state switching of the electromagnetic valve.

[0015] Further, the box body comprises a detachable mounting frame, the guide holes are arranged on the two sides of the mounting frame, the frame part of the movable connector is mounted on the mounting frame, and the multi-core contact butt joint parts on the two sides of the movable connector are arranged on the two sides of the mounting frame respectively; a motherboard mounting rack is further arranged in the box body, the motherboard mounting rack comprises a bottom edge, two vertical edges on the two sides and a detachable top edge, and mounting holes are arranged on the bottom edge, the vertical edges and the top edge; the top edge can be transversely fixed between the two vertical edges and adjusted to different mounting heights; the motherboard is fixedly mounted on the motherboard mounting rack through the mounting holes; a plurality of fixed strips with different heights are arranged on the two side walls in the box body, and the measured circuit board can be mounted along the fixed strips and plugged into the interface on one side of the motherboard.

[0016] Another aspect of the present application provides a universal multi-core connector docking method for test equipment detection, comprising the following steps: step S1, test preparation: installing the test tool on the docking mechanism, making the movable connector on the test tool face the fixed connector, connecting one end of the mother board with the movable connector, inserting the measured circuit board into the other end of the mother board; connecting the plug-in interface integrated with signal groups on the mother board to the corresponding multi-core contact docking part of the movable connector through the docking wire harness or connecting wire, ensuring accurate interface connection; step S2, docking execution: triggering the forward instruction through the test equipment or manually, the controller receives the instruction and connects the forward electromagnetic valve, the air source supplies air to the forward end of the air cylinder, the air cylinder pushes the fixed plate along the guide rail assembly to move towards the fixed connector through the connecting rod; making the movable connector dock with the fixed connector; step S3, docking locking: when the air cylinder advances to the predetermined position, the travel switch sends a signal to the controller after sensing, the controller cuts off the power supply of the forward electromagnetic valve, the forward adjusting valve locks the pressure, the docking is completed and the test is performed; step S4, separation execution: after the test is completed, triggering the backward instruction through the test equipment or manually, the controller connects the backward electromagnetic valve, the air source supplies air to the retracting end of the air cylinder, the air cylinder drives the fixed plate and the test tool to retreat, making the movable connector separate from the fixed connector; step S5, separation locking: when the air cylinder retreats to the predetermined position, the backward travel switch sends a signal to the controller after sensing, the controller cuts off the power supply of the backward electromagnetic valve, the backward adjusting valve locks the pressure, completing the separation.

[0017] Further, in step S2, the fixed connector is installed on the fixed block, the fixed block is provided with a guide pin, the guide pin is inserted into the guide hole of the test tool box body to realize alignment, the movable connector is provided with a positioning half pin, and the fixed connector is provided with a positioning slot; during the docking execution, the guide pin is first inserted into the guide hole for preliminary alignment, and then the positioning half pin is inserted into the positioning slot for secondary positioning, so that the small weak signal interface hole, the conventional signal interface group, and the power signal interface group can be aligned and docked with the corresponding docking structure of the fixed connector.

[0018] Further, in step S2, according to the physical size and interface position of the mother board, the top edge is fixed horizontally on the mounting holes of the corresponding height of the two side vertical edges to form a rigid fixed frame matching the size of the mother board. The mother board is placed in the frame composed of the bottom edge, vertical edge and top edge. On the inside of the two side walls of the box body, there are fixed strips at different heights. According to the thickness of the measured circuit board and the interface position, a pair of fixed strips at the same height and aligned with the interface of the mother board are selected as the installation stopper. The measured circuit board is pushed into the box body along the selected fixed strips with its board edge. Until the connector on the board edge is aligned and connected with the corresponding interface on the fixed mother board. When the measured circuit board is successfully connected with the mother board, an integrated test unit is formed. The test signal points of the measured circuit board are led to the active connector through the internal wiring of the mother board.

[0019] Further, in step S2, the one side interface of the mother board is connected with the rear end of the active connector to establish an electrical path from the multi-core contact assembly of the active connector to the mother board. The butt plug on the fixed connector is fully inserted into the jack on the multi-core contact butt joint of the active connector. At the same time, the interface on the multi-core contact assembly of the active connector is also fully engaged with the corresponding interface on the fixed connector. The small and weak signal path is established through the shielded interface distributed on both sides, which can effectively prevent signal crosstalk and external electromagnetic interference. The power signal path is established through the power signal interface group located in the middle to provide power connection. The conventional signal path is established through the conventional signal interface group located below the power group. The multi-type signal electrical path is established from the test equipment, test cable, fixed connector, active connector, mother board to the measured circuit board.

[0020] The working principle of the application: the pneumatic drive is the power, the mechanical structure is the guidance of the docking process, the electrical control is the logic core, and the paired connector is the signal connection carrier, realizing the automatic, high adaptability docking and separation of the general test equipment and various measured circuit boards, while ensuring stable transmission of multiple signals, solving the pain points of difficult manual plugging and poor adaptability of multi-core connectors. The application takes stable air pressure as the power, mechanical structure as the guidance, electrical system as the control core, and paired connector as the signal transmission component. First, the general docking reference is established through the rigidly installed fixed connector and the movable connector at the end of the test tool. The mother board realizes electrical communication between the measured circuit board and the movable connector. The air source maintains stable pressure and each component is in standby state. During docking, the electrical controller is triggered by automatic instruction of the test equipment or manual button. The controller connects the forward electromagnetic valve to make the cylinder push the test tool to move along the guide rail to the fixed connector. The guide pin on the fixed block is inserted into the test tool guide hole to guide the posture. The preset floating amount of the movable connector compensates the installation error. After reaching the position, the travel switch sends a signal to cut off the electromagnetic valve power and lock the air pressure, forming a complete signal path for the test equipment to transmit multiple signals and complete the detection. After the test is completed, the separation instruction is triggered. The controller connects the backward electromagnetic valve to make the cylinder drive the test tool to retreat. The movable connector is separated from the fixed connector. After retreating to the position, the travel switch triggers a signal to cut off the power and lock the air pressure. The test tool resets to wait for the next docking. The whole process realizes the automatic and accurate docking, stable testing and safe separation of the general test equipment and various measured circuit boards, solving the problems of difficult manual plugging and poor adaptability of multi-core connectors.Wherein: the fixed connector provides a stable docking reference, is rigidly connected with the bottom plate through the fixed block, ensures the position accuracy, provides a ''fixed target point'' for automatic docking, and avoids the card jam caused by reference deviation during docking; the modularization / configurable characteristics of the movable connector, including the core number and interface type, are determined by the test parameters of the measured circuit board, and the movable connector supports adaptation with different interface types (BTB, wire-to-board, etc.) of the measured board, without the need to design a dedicated connector for each product; the universal docking end of the fixed connector serves as an ''intermediate transfer hub'' of the test equipment and test tooling, the interface form of the universal docking end is paired with the movable connector, and the universal docking end can be compatible with multi-core and multi-signal type (power, analog, digital signal) transmission, so that the test equipment does not need to change its own interface, but only needs to replace the movable connector and part of the structure of the test tooling to adapt to the new measured product, thereby greatly reducing the adaptation cost and avoiding repeated design of ''one measured board corresponding to one set of dedicated connector''; the structure is also adapted to the anti-interference requirement of the signal, the movable connector can be integrated with a shielding structure (such as a metal shielding shell) and signal grouping arrangement (power / digital / analog signal partition), and the fixed connector corresponds to the same anti-interference design to form a full-link signal protection, thereby reducing internal crosstalk and external electromagnetic interference; the movable connector is designed in an integrated manner with the test tooling, and only needs to disassemble the fixing screws of the test tooling when being replaced, without the need to change the core components of the test equipment or docking mechanism; the fixed connector is independently installed on the fixed block, and can be replaced individually if damaged, without the need to disassemble the entire docking mechanism, and if the signal type needs to be increased later, only the movable connector of the corresponding type needs to be replaced, and the fixed connector can remain unchanged, thereby greatly improving the expansibility of the scheme; and overall, a standardized signal path of test equipment→fixed connector→movable connector→measured board is formed, which is convenient for compatibility with test equipment of different brands and types, and improves the market adaptability of the scheme.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] 1. According to the modular design (core number, interface can be configured according to the measured board parameters) of the movable connector and the universal docking end design of the fixed connector, only the test tooling needs to be replaced to adapt to different types of measured circuit boards, without the need to change the core structure of the test equipment. The situation that the connector cannot be manually plugged in due to excessive plugging force caused by too many and complex connector pins is solved; the fixed connector and the movable connector are independently modularized and installed, and can be replaced individually if damaged, without the need to disassemble the core mechanism, thereby reducing the maintenance cost.

[0023] 2. According to the present application, the precision guidance of the guide pin and the guide rail assembly, the size control of the connector center error ≤0.05mm, and the floating amount compensation design of the movable connector ensure the docking accuracy; the signal grouping arrangement and shielding structure are matched to reduce internal crosstalk and external electromagnetic interference, and the accuracy of test data is further improved compared with the prior art.

[0024] 3. This invention, through a combined design of pneumatic drive and mechanical guidance, completely replaces manual insertion and removal, significantly improving docking efficiency. The time required for a single docking / separation action is reduced to the second level, and commands can be automatically triggered by testing equipment, adapting to large-scale continuous testing scenarios. This solves the pain points of cumbersome switching and low efficiency when testing multiple products with a single device in existing technologies. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the usage state structure of a general-purpose multi-core connector used for testing equipment.

[0026] Figure 2 A three-dimensional view of the test fixture structure with the circuit board under test mounted.

[0027] Figure 3 A schematic diagram of the pneumatic components for a general-purpose multi-core connector used in testing equipment;

[0028] Figure 4 This is a schematic diagram of the electrical controller for a general-purpose multi-core connector used in testing equipment.

[0029] Figure 5 A schematic diagram of the structural installation and assembly of the test fixture;

[0030] Figure 6 One of the three-dimensional views of the test fixture after installation;

[0031] Figure 7 The second three-dimensional view of the structure after the test fixture has been installed;

[0032] Figure 8 The third three-dimensional view of the structure after the test fixture has been installed;

[0033] Figure 9 A three-dimensional view of the test fixture structure with another motherboard installed;

[0034] Figure 10 A schematic diagram showing the connection between the movable connector and the fixed connector after another motherboard has been installed;

[0035] Figure 11 A three-dimensional view of a test fixture structure with another type of motherboard installed;

[0036] Figure 12 A schematic diagram showing the connection between the active connector and the fixed connector when another type of motherboard is installed;

[0037] Figure label:

[0038] 1—Workbench, 2—Controller, 3—Air source, 4—Sliding block, 5—Connecting rod, 6—Cylinder, 7—Test fixture, 8—Guide pin, 9—Fixing block, 10—Fixing connector, 11—Test cable, 12—Fixing guide rail, 13—Guide rail seat, 14—Base plate, 15—Fixing plate, 16—Circuit board under test, 17—Box, 18—Mother board, 19—Movable connector, 20—Circuit board under test, 21—Limit switch, 22—Limit switch, 27—Cylinder, 28—Forward regulating valve, 29—Reverse regulating valve;

[0039] 30—One-way valve, 31—Pressure regulating valve, 32—Forward solenoid valve, 33—Reverse solenoid valve, 34—Pressure reducing valve, 35—Bottom edge, 36—Vertical edge, 37—Top edge, 38—Mounting hole, 39—Fixing strip. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0041] Example 1

[0042] Overall Structure Overview of the Device

[0043] This embodiment provides a universal multi-core connector device for testing equipment. Its core function is to achieve automated and precise docking, stable transmission of multiple signals, and safe separation between universal testing equipment and various specifications of circuit boards 16 under test. The overall size of the device is suitable for conventional industrial testing scenarios, with a total footprint of approximately 0.8m × 0.6m, facilitating flexible placement at testing stations. It mainly consists of three parts: a testing fixture 7, a docking mechanism, and an air source 3. These parts work together to achieve a complete testing chain of "power drive - precise guidance - electrical control - signal transmission".

[0044] Test fixture 7 serves as the core for carrying and signal conversion of the circuit board under test 16. It adopts a modular and detachable design, and its specific structure is as follows:

[0045] 1. Housing 17: Combining lightweight design with structural rigidity. The front of housing 17 features a detachable mounting frame with three symmetrical guide holes on both sides. These guide holes are 8mm in diameter and 20mm deep, and their walls are treated with wear-resistant materials to improve repeated connection life. Inside housing 17, metal fixing strips 39 are installed at specific intervals along the height of both side walls to support and position the circuit boards 16 at different mounting heights.

[0046] 2. Motherboard 18 Mounting Bracket: Made of aluminum alloy or PET plastic, it includes a bottom edge 35, two vertical edges 36, and a detachable top edge 37, all three with M4 mounting holes 38. The top edge 37 is fixed to the vertical edges 36 with bolts, and its installation position can be adjusted along the height of the vertical edges 36 to accommodate different sizes of motherboard 18. The motherboard 18 is fixed to the mounting bracket through the mounting holes 38.

[0047] 3. Motherboard 18: One side of the motherboard 18 is equipped with a BTB interface (0.8mm spacing) for connecting to the circuit board under test 16; the other side is equipped with a multi-pin socket adapted to the movable connector 19, enabling signal communication between the circuit board under test 16 and the movable connector 19. The motherboard 18 integrates signal classification wiring, arranging power, analog, and digital signals in separate zones.

[0048] 4. Movable Connector 19: The overall structure is rectangular. Multi-core contact components are independently grouped according to signal type. The low-signal interface group is encapsulated in a copper shield and is distributed in groups on both sides of the movable connector 19. The power signal interface group is located in the middle of the movable connector 19. The conventional signal interface group is located below the power signal interface group and is used to transmit digital and ordinary analog signals. Each interface group protrudes 10mm outwards for precise alignment with the fixed connector 10. Three positioning pins, either insert-shaped or cylindrical, are located in the center of the mating surface of the movable connector 19. The frame of the movable connector 19 is bolted to the mounting frame at the front end of the housing 17, ensuring that the low-signal mating parts on both sides are exposed on either side of the mounting frame, guaranteeing complete mating of the shielded interfaces.

[0049] Connecting organizations

[0050] The docking mechanism is the core of the device's power and positioning, providing stable linear drive and ensuring docking accuracy. Its specific structure is as follows:

[0051] Sports institutions:

[0052] Base plate 14: Fixed to the test station table with bolts.

[0053] Fixing block 9: The mating surface of fixing block 9 facing the box body 17 is provided with 3 guide pins 8, which are matched one by one with the guide holes of the mounting frame of the box body 17 to ensure smooth insertion during docking.

[0054] Guide rail assembly: The guide rail base 13 is made of aluminum alloy and is fixed to the left side of the fixing block 9 on the base plate 14 by bolts. The fixed guide rail 12 is a linear guide rail. The sliding block 4 and the fixed guide rail 12 form a clearance fit, and the fixing plate 15 is fixed above the sliding block 4 by bolts.

[0055] Cylinder 6 and connecting rod 5: Cylinder 6 is a standard double-acting cylinder 6, which is installed on the upper left side of the base plate 14.

[0056] Fixed connector 10: Designed to mate with movable connector 19, its shell material is the same as that of movable connector 19. Its mating surface has 230-pin sockets corresponding to the multi-pin contact components of movable connector 19, with elastic contact pieces inside the sockets to ensure reliable contact after mating. Three positioning slots are provided in the center of the mating surface, the diameter, depth, and spacing of which are adapted to the positioning half-pins of movable connector 19. Fixed connector 10 is fixed to the center of fixing block 9 by bolts, its center height being the same as that of movable connector 19. The other side of fixed connector 10 is connected to external testing equipment via test cable 11. Test cable 11 is a shielded cable with 230 cores, supporting synchronous transmission of power, analog signals, and digital signals.

[0057] Controller 2 and air source 3

[0058] Controller 2 is the control core of the device, realizing closed-loop control of "command input - power execution - position feedback", and air source 3 provides power guarantee.

[0059] Pneumatic components include a pressure regulating valve 31, a one-way valve 30, a two-position three-way solenoid valve (including a forward solenoid valve 32, a reverse solenoid valve 33, and a neutral position), a forward regulating valve 28, a reverse regulating valve 29, and an air pipe; the one-way valve 30 prevents airflow backflow and ensures stable operation of the cylinder 6; the forward regulating valve 28 and the reverse regulating valve 29 are used to regulate the movement speed of the cylinder 6; the air inlet at the forward end of the cylinder 6 is connected to the air outlet of the forward solenoid valve 32 through the air pipe, and the air inlet at the reverse end is connected to the air outlet of the reverse solenoid valve 33 to ensure that the airflow is turned on and off as needed.

[0060] Electrical Controller 2: The core uses an STM32 series MCU, featuring multi-channel digital input / output interfaces and supporting rising-edge triggered interrupt control. The controller 2 panel has forward, reverse, and emergency stop buttons, all of which are self-resetting. Limit switches 21 are installed at the forward and reverse ends of cylinder 6, respectively, both connected to the MCU signal input via wires. Electrical Controller 2 also includes a first and a second contactless electromagnetic switch, installed at the forward and reverse limits of cylinder 6, respectively. These switches work in conjunction with the magnetic field within the piston to achieve precise position detection, with the detection signal transmitted to the MCU in real time. Relays, including a first and a second relay, are connected to the MCU output, forward solenoid valve 32, and reverse solenoid valve 33, respectively, to achieve isolated drive between electrical control and pneumatic actuation.

[0061] Air source 3: A small air compressor is used, which is connected to the air intake end of the pneumatic components through an air pipe to provide a stable power source for cylinder 6.

[0062] Device assembly process

[0063] 1. Assembly of the motion mechanism: First, fix the base plate 14 to the test platform. Then, fasten the fixing block 9 to one end of the base plate 14 with bolts, ensuring that the mating surface of the fixing block 9 is perpendicular to the plane of the base plate 14. Next, install the guide rail seat 13 and the fixed guide rail 12. After adjusting the parallelism of the guide rail to the qualified range, tighten the bolts. Install the sliding block 4 on the fixed guide rail 12, and then fix the fixing plate 15 above the sliding block 4. Finally, install the cylinder 6 and the connecting rod 5, ensuring that the connecting rod 5 is firmly connected to the fixing plate 15 and that the cylinder 6 push rod extends and retracts smoothly without jamming.

[0064] 2. Assembly of Fixed Connector 10: Connect one end of the test cable 11 to the test equipment and the other end to the fixed connector 10. Then pass the fixed connector 10 through the through hole of the fixing block 9 and fix it to the center position of the fixing block 9 with bolts. Adjust its height and horizontal position so that the center height is consistent with the movable connector 19 to be installed later.

[0065] 3. Assembly of test fixture 7: First, fix the mounting bracket of the motherboard 18 inside the housing 17. Adjust the height of the top edge 37 according to the size of the circuit board 16 to be tested, and fix the motherboard 18 on the mounting bracket. Insert the circuit board 16 to be tested along the fixing strip 39 inside the housing 17 and connect it to the BTB interface of the motherboard 18. Then, fix the movable connector 19 to the front mounting frame of the housing 17 with the frame bolts, ensuring that the movable connector 19 and the pin socket of the motherboard 18 are accurately aligned.

[0066] 4. Assembly of Controller 2 and Air Source 3: Integrate all valves of the pneumatic assembly into the control box, connect the air pipes according to the pneumatic circuit diagram, and ensure that the air pipes are leak-free. Install the MCU, relays, switches, and other components of the electrical controller 2 into the control box, connect the wires according to the electrical circuit diagram, and complete the wiring and debugging of the power supply and signal lines. Finally, connect the air source 3 to the air inlet of the pneumatic assembly through the air pipe, and check the reliability of the air circuit and electrical circuit connection.

[0067] 5. Overall debugging: Connect the power supply and air source 3, adjust the pressure regulating valve 31 to stabilize the pressure of air source 3, test the extension and retraction of cylinder 6 by manually pressing the button, and ensure that the guide rail slides smoothly, the limit switch 21 and the contactless electromagnetic switch are triggered accurately, the guide pin 8 smoothly inserts into the guide hole when the movable connector 19 and the fixed connector 10 are connected, and the positioning half pin and the positioning slot are precisely matched without jamming or offset.

[0068] Device operation process

[0069] 1. Docking Phase: Before testing, the circuit board under test 16 is fixed inside the housing 17 and forms a signal path with the motherboard 18 and the movable connector 19. The air source 3 has stable pressure, and the device is in standby mode. The operator presses the forward button or the testing equipment automatically issues a docking command. After the MCU receives the command (the rising edge triggers an interrupt), it controls the first relay to engage, the forward solenoid valve 32 is activated, and the air source 3 supplies air to the forward end of the cylinder 6. The cylinder 6 push rod extends, and through the connecting rod 5, it pushes the fixed plate 15 along the fixed guide rail 12 towards the fixed connector 10, causing the testing fixture 7 to move synchronously. During the docking process, the guide pin 8 on the fixed block 9 is first inserted into the guide hole of the mounting frame of the housing 17 to achieve initial alignment. As the distance shortens, the positioning half pin of the movable connector 19 gradually embeds into the positioning slot of the fixed connector 10 to complete precise positioning. Finally, the multi-core contact component of the movable connector 19 is fully docked with the corresponding socket of the fixed connector 10, forming a complete signal path of "test equipment → test cable 11 → fixed connector 10 → movable connector 19 → motherboard 18 → circuit board under test 16". When the cylinder 6 advances to the predetermined position, the limit switch 21 and the first contactless electromagnetic switch are triggered simultaneously, sending a position signal to the MCU. The MCU controls the first relay to open, the forward solenoid valve 32 to close, the forward regulating valve 28 to lock the air pressure, the cylinder 6 stops moving, and the docking is completed.

[0070] 2. Testing Phase: After docking, the testing equipment outputs test signals to the circuit board under test (PCB) 16 through the signal path, and simultaneously collects feedback signals from the PCB 16. The grouping arrangement and shielding structure of the movable connector 19 effectively avoids signal crosstalk and external electromagnetic interference, ensuring stable transmission of multiple types of signals and accurate and reliable test data. During the test, if any abnormal situation occurs, the operator can press the emergency stop button. The MCU will immediately control the first and second relays to disconnect simultaneously, and both the forward solenoid valve 32 and the reverse solenoid valve 33 will close, stopping the cylinder 6 and providing safety protection.

[0071] 3. Separation Phase: After the test is completed, by pressing the retract button or receiving a separation command from the test equipment, the MCU receives the command and controls the second relay to engage, the retracting solenoid valve 33 to open, and the air source 3 supplies air to the retracted end of the cylinder 6. The cylinder 6 push rod retracts, driving the fixed plate 15 and the test fixture 7 to retract along the guide rail via the connecting rod 5. The movable connector 19 and the fixed connector 10 gradually separate, the positioning half pin disengages from the positioning slot, and the guide pin 8 is pulled out from the guide hole. When the cylinder 6 retracts to the initial position, the retracting limit switch 21 and the second non-contact solenoid switch are triggered, sending a reset signal to the MCU. The MCU controls the second relay to disconnect, the retracting solenoid valve 33 to close, and the retracting regulating valve 29 to lock the air pressure to prevent the cylinder 6 from malfunctioning. The test fixture 7 returns to the initial position, and the operator can remove the circuit board 16 under test or replace it with a new circuit board 16 for the next round of testing.

[0072] Example 2

[0073] For details regarding the work process and the structure of test fixture 7, please refer to [link / details]. Figure 2 :

[0074] Figure 2 The test fixture 7 consists of a movable connector 19, a motherboard 18, and a housing 17. The shape and size of the housing 17 are determined by the circuit board 16 under test. Three guide holes are provided on the front face of the housing 17, and these guide holes are paired with guide pins 8 on the fixing block 9. The movable connector 19 is used in conjunction with the fixed connector 10. The movable connector 19 has a certain amount of floating during mating. The number of pins and shape of the movable connector 19 are determined by the test parameters of the circuit board 16 under test.

[0075] One end of the motherboard 18 is connected to the movable connector 19, and the other end is connected to the circuit board under test 16, thus connecting the circuit board under test 16 to the movable connector 19. The housing 17 serves to fix the circuit board under test 16.

[0076] The docking mechanism consists of a workbench 1, a motion mechanism, a fixed connector 10, and a controller 2. The workbench 1 is a standard table. The motion mechanism consists of a base plate 14, a fixed block 9, a fixed guide rail 12, a guide rail seat 13, a sliding block 4, a fixed plate 15, a connecting rod 5, and a cylinder 6.

[0077] The fixing block 9 is fixed to the upper left side of the base plate 14 with bolts. The fixing connector 10 is installed on the fixing block 9. Three guide pins 8 are set on the right side of the mating surface of the fixing block 9. The guide pins 8 are matched with the guide holes on the front end face of the box 17 and play a guiding role during the mating. The guide rail seat 13 is fixed to the left side of the fixing block 9 on the base plate 14. The fixed guide rail 12 is installed on the guide rail seat 13. The sliding block 4 is installed on the fixed guide rail 12. The sliding block 4 and the fixed guide rail 12 are a kinematic pair. The sliding block 4 can slide on the fixed guide rail 12 along the length of the fixed guide rail 12. The fixing plate 15 is installed on the sliding block 4. The test fixture 7 is fixed on the fixing plate 15 with screws. The cylinder 6 is installed on the upper left side of the base plate 14. The push rod of the cylinder 6 faces the fixing plate 15. The push rod of the cylinder 6 is connected to the connecting rod 5. The other end of the connecting rod 5 is connected to the fixing plate 15. The air inlet of the forward end of cylinder 6 is connected to the air outlet of the forward solenoid valve 32, and the air inlet of the reverse end of cylinder 6 is connected to the air outlet of the reverse solenoid valve 33, connected via a compressed air pipe. Two limit switches 21 are installed. One end of limit switch 21 with a sensor is installed at the forward end of cylinder 6, and the other end is connected to the electrical controller 2MCU. The other end of limit switch 21 with a sensor is installed at the retracted end of cylinder 6, and the other end is connected to the electrical controller 2MCU. The specific installation positions need to be precisely determined through debugging. One of the core key points of the entire assembly is to ensure that the height from the upper surface of the base plate 14 to the center of the fixed connector 10 is consistent with the height from the upper surface of the base plate 14 to the center of the movable connector 19 on the test fixture 7. Secondly, the centers of the fixed connector 10 and the movable connector 19 on the test fixture 7 in the width direction must be consistent, with an error of less than 0.05mm.

[0078] The fixed connector 10 is used in pairs with the movable connector 19. One end is connected to the test equipment, and the other end is connected to the test fixture 7. During testing, the test equipment and the test fixture 7 are electrically connected and fixed by the fixing block 9.

[0079] The controller 2 consists of a pneumatic assembly and an electrical controller 2. The pneumatic assembly includes a pressure regulating valve 31, a one-way valve 30, a two-position three-way solenoid valve, a neutral position, a forward regulating valve 28, a reverse regulating valve 29, a forward solenoid valve 32, a reverse solenoid valve 33, and air pipes, etc.

[0080] Figure 3 pneumatic component schematic diagram

[0081] The schematic diagram of electrical controller 2 is shown below. Figure 4 It mainly consists of an MCU, a forward button, a backward button, an emergency stop button, a first contactless electromagnetic switch, a second contactless electromagnetic switch, a first relay, a second relay, a forward solenoid valve 32, and a backward solenoid valve 33. The inputs include forward, backward, and stop functions, all of which are implemented using rising edge triggering interrupts. The inputs also include contactless electromagnetic switch inputs, and the outputs include the first relay and the second relay.

[0082] The first and second contactless electromagnetic switches are connected to the MCU via wires. The forward, backward, and stop buttons are also connected to the MCU via wires. The first and second relays are connected to the MCU via wires. The first relay is connected to the forward solenoid valve 32 via a wire, and the second relay is connected to the backward solenoid valve 33 via a wire.

[0083] When the piston of cylinder 6 advances to a certain position, the first contactless solenoid switch interacts with the magnetic field inside the piston, forming a circuit and outputting a voltage level. When this level is detected by the MCU, the MCU controls the first relay to disconnect, at which point the forward solenoid valve will open, stopping forward movement. When the piston of cylinder 6 retracts to a certain position, the second contactless solenoid switch interacts with the magnetic field inside the piston, forming a circuit and outputting a voltage level. When this level is detected by the MCU, the MCU controls the second relay to disconnect, at which point the backward solenoid valve will open, stopping backward movement. The emergency stop button, when pressed in case of an accident, will cause the MCU to simultaneously disconnect the first and second relays, disconnecting both the forward and backward solenoid valves, thus stopping the piston of cylinder 6 and providing a safety function.

[0084] Figure 4 Electrical controller 2 schematic diagram

[0085] Air source 3 is an air compressor or an air compressor station with compressed air supply. Air source 3 is connected to the air inlet of controller 2. During operation, air source 3 is in a state of 0.5-0.8 MPa.

[0086] Before testing, the test fixture 7 is fixed to the fixed plate 15 of the docking mechanism with screws, with the end with the movable connector 19 facing the direction of the fixed connector 10, and the bottom of the test fixture 7 is in contact with the fixed plate 15.

[0087] At the start of the test, the pressure of the air source 3 is stable, and the test equipment and docking device are in working condition. The test equipment or the forward button in the electrical controller 2 is used to input a command to the docking device. The coil of the forward solenoid valve 32 in the electrical controller 2 is turned on, the forward solenoid valve 32 is opened, air enters the forward end of the cylinder 6, the cylinder 6 is pushed out, and the push rod of the cylinder 6 pushes the fixed plate 15 forward towards the fixed connector 10 through the connecting rod 5. The fixed plate 15 drives the test fixture 7 to approach the fixed connector 10. When they approach, the guide pin 8 is inserted into the guide hole to guide the movable connector 19. As the two connectors approach, the guide pin 8 guides the fixed connector 10 and the movable connector 19 to make contact. Under the thrust of the cylinder 6, the movable connector 19 is inserted into the fixed connector 10. When it reaches the predetermined position, the limit switch 21 senses the position and sends a signal to the electrical controller 2. The electrical controller 2 cuts off the power to the forward solenoid valve 32, the solenoid valve returns to the neutral position, the cylinder 6 loses the forward power and stops moving forward. The forward regulating valve 28 prevents the airflow backflow and locks the pressure. The docking is completed and the test can be carried out.

[0088] After the test is completed, a signal is input to the MCU via the test equipment or by manually pressing the back button of the electrical controller 2. The MCU opens the back solenoid valve 33 switch, and compressed air enters the retracting end of the cylinder 6. Under the pressure, the cylinder 6 retracts. The cylinder 6 push rod drives the fixed plate 15 to retract via the connecting rod 5. The fixed plate 15 drives the test fixture 7 to separate from the fixed connector 10. When the cylinder 6 retracts to the predetermined position, the back limit switch 21 senses the predetermined position and sends a signal to the MCU. The MCU disconnects the coil of the back solenoid valve 33, the solenoid valve returns to the neutral position, the cylinder 6 loses the back retraction power and stops retracting. The back regulating valve 29 prevents the airflow backflow, locks the pressure, prevents the cylinder 6 from malfunctioning, and completes the separation.

[0089] By repeating the above steps as needed, testing and disconnection can be continuously achieved.

[0090] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A universal multi-core connector for testing equipment, characterized in that, include: Test fixture (7) and docking mechanism; The test fixture (7) includes a housing (17), a movable connector (19), and a motherboard (18). The movable connector (19) is installed on the mating surface of the housing (17), and the motherboard (18) is located inside the housing (17). The motherboard (18) is connected to the movable connector (19) and the circuit board under test (16) respectively. The circuit board under test (16) and the motherboard (18) are both installed in the housing (17) in a detachable manner. The active connector (19) is a multi-signal compatible docking structure, which includes a multi-core contact component for transmitting multiple types of test signals, and a multi-core contact docking part adapted to the interface requirements of different test circuit boards (16); the multi-core contact component can carry at least two test signals at the same time. The docking mechanism includes a motion mechanism, a fixed connector (10), and a controller (2). The controller (2) is connected to the motion mechanism, which is driven to the housing (17). Under the control of the controller (2), the housing (17) can be moved to approach the fixed connector (10). The fixed connector (10) is provided with a docking structure that corresponds to and is adapted to the multi-core contact docking part and multi-core contact assembly of the movable connector (19). After docking, the movable connector (19) can be connected to the fixed connector (10) through the multi-core contact docking part and multi-core contact assembly, so that the fixed connector (10) can dock with the circuit board (16) under test. The other side of the fixed connector (10) is a test cable (11), which is connected to the test equipment. The multi-core contact assembly and multi-core contact mating part on the movable connector (19) extend through both sides of the movable connector (19) and are made of insulating material. Different types of signal contact terminal pins and sockets are arranged in independent groups. Among them, small and weak signal sockets are distributed in groups on both sides of the movable connector (19) using shielded interfaces, and the power signal interface group is located in the middle of the movable connector (19). The conventional signal interface group is located below the power signal interface group, and each group protrudes outward as a whole.

2. The universal multi-core connector according to claim 1, characterized in that, The motion mechanism includes a base plate (14), a fixing block (9), a guide rail assembly, a fixing plate (15), a connecting rod (5), and a cylinder (6), wherein: The fixing block (9) is fixed to one end of the base plate (14), and the fixing connector (10) is installed on the fixing block (9); The guide rail assembly includes a guide rail seat (13), a fixed guide rail (12), and a sliding block (4). The guide rail seat (13) is fixed on the base plate (14), the fixed guide rail (12) is installed on the guide rail seat (13), the sliding block (4) and the fixed guide rail (12) form a kinematic pair, and the fixed plate (15) is fixed on the sliding block (4). The test fixture (7) is mounted on the fixed plate (15); The cylinder (6) is mounted on the base plate (14), and its push rod is connected to the fixed plate (15) through the connecting rod (5); it can push the test fixture (7) to move along the guide rail assembly, so that the multi-core contact assembly and / or the multi-core contact mating part can be moved and mated with the fixed connector (10) on the fixed block (9) or pulled out and separated.

3. The universal multi-core connector according to claim 2, characterized in that, The front end face of the housing (17) is provided with several guide holes, and the mating surface of the fixing block (9) opposite to the housing (17) is provided with guide pins (8) that match the number and position of the guide holes; so that during the docking process, the guide pins (8) can be inserted into the guide holes, so that the fixed connector (10) and the movable connector (19) are aligned and docked; several protruding positioning half pins are provided in the middle of the mating surface of the movable connector (19); the mating surface of the fixed connector (10) is provided with positioning slots that are adapted to the positioning half pins at corresponding positions; the number, position and depth of the positioning slots are matched with the positioning half pins.

4. The universal multi-core connector according to claim 2, characterized in that, The controller (2) includes a pneumatic assembly and an electrical controller (2). The pneumatic assembly includes a pressure regulating valve (31), a check valve (30), a forward solenoid valve (32), a backward solenoid valve (33), a forward regulating valve (28), and a backward solenoid valve (33). The electrical controller (2) includes an MCU, a forward button, a backward button, an emergency stop button, a limit switch (21), a return limit switch (21), and a relay. The air source (3) is connected to the air inlet of the controller (2) to provide power to the cylinder (6). The air inlet of the forward end of the cylinder (6) is connected to the air outlet of the forward solenoid valve (32), and the air inlet of the backward end of the cylinder (6) is connected to the air outlet of the backward solenoid valve (33). The limit switch (21) is installed at the forward end of the cylinder (6), and the return limit switch (21) is installed at the backward end of the cylinder (6). Both are connected to the MCU.

5. The universal multi-core connector according to claim 4, characterized in that, The electrical controller (2) also includes a first contactless electromagnetic switch and a second contactless electromagnetic switch, which are connected to the MCU respectively and used to detect the forward and backward positions of the piston of the cylinder (6); The relays include a first relay and a second relay, which are respectively connected to the MCU, the forward solenoid valve (32) and the backward solenoid valve (33); The pneumatic assembly also includes a two-position three-way solenoid valve in the center position, used to switch the state of the solenoid valve.

6. The universal multi-core connector according to claim 3, characterized in that, The housing (17) includes a detachable mounting frame, the guide holes are provided on both sides of the mounting frame, and the frame portion of the movable connector (19) is mounted on the mounting frame, so that the multi-core contact mating portions on both sides of the movable connector (19) are located on both sides of the mounting frame. The box (17) is also provided with a mother plate (18) mounting frame. The mother plate (18) mounting frame includes a bottom edge (35), two vertical edges (36) on both sides and a detachable top edge (37). The bottom edge (35), vertical edges (36) and top edge (37) are all provided with mounting holes (38). The top edge (37) can be horizontally fixed between the two vertical edges (36) and the different installation heights can be adjusted. The mother plate (18) is fixedly installed on the mother plate (18) mounting frame through the mounting holes (38). The inner side walls of the box (17) are provided with several fixing strips (39) of different heights. The circuit board (16) to be tested can be installed along the fixing strips (39) and plugged into the interface on one side of the motherboard (18).

7. A method for mating a universal multi-core connector used in testing equipment, characterized in that... Includes the following steps: Step S1, Pre-test preparation: Install the test fixture (7) on the docking mechanism, so that the movable connector (19) on the test fixture (7) faces the fixed connector (10), one end of the motherboard (18) is connected to the movable connector (19), and the circuit board under test (16) is inserted into the motherboard (18) and the other end is connected to the motherboard (18); connect the plug interface of the integrated signal group on the motherboard (18) to the corresponding multi-core contact docking part of the movable connector (19) through the docking wire harness or connecting wire to ensure that the interface connection is accurate; Step S2, docking execution: By testing the equipment or manually triggering the forward command, the controller (2) receives the command and turns on the forward solenoid valve (32). The air source (3) supplies air to the forward end of the cylinder (6). The cylinder (6) pushes the fixed plate (15) along the guide rail assembly towards the fixed connector (10) through the connecting rod (5); so that the movable connector (19) docks with the fixed connector (10). Step S3, docking lock: When the cylinder (6) moves forward to the predetermined position, the limit switch (21) senses and sends a signal to the controller (2). The controller (2) cuts off the power to the forward solenoid valve (32), and the forward regulating valve (28) locks the pressure. The docking is completed and the test is performed. Step S4, Separation Execution: After the test is completed, the controller (2) connects the retraction solenoid valve (33) through the test equipment or by manually triggering the retraction command, and the air source (3) supplies air to the retraction end of the cylinder (6). The cylinder (6) drives the fixed plate (15) and the test fixture (7) to retract, so that the movable connector (19) is separated from the fixed connector (10). Step S5, Separation and Locking: When the cylinder (6) retracts to the predetermined position, the retraction limit switch (21) senses it and sends a signal to the controller (2). The controller (2) cuts off the power supply to the retraction solenoid valve (33), and the retraction regulating valve (29) locks the pressure, thus completing the separation.

8. The docking method according to claim 7, characterized in that, In step S2, the fixed connector (10) is installed on the fixed block (9), the fixed block (9) is provided with a guide pin (8), the guide pin (8) is inserted into the guide hole of the test fixture (7) box (17) to achieve alignment, the movable connector (19) is provided with a positioning half pin, and the fixed connector (10) is provided with a positioning slot; during the docking process, the guide pin (8) is first inserted into the guide hole for preliminary alignment, and then the positioning half pin is inserted into the positioning slot for secondary positioning, so that the small weak signal interface, the conventional signal interface group, and the power signal interface group can all be aligned and docked with the corresponding docking structure on the fixed connector (10).

9. The docking method according to claim 7, characterized in that, In step S2, based on the physical dimensions and interface position of the mother plate (18), the top edge (37) is horizontally fixed to the mounting holes (38) at the corresponding heights of the two vertical edges (36) to form a rigid fixing frame that matches the dimensions of the mother plate (18). The mother plate (18) is then placed into the frame composed of the bottom edge (35), vertical edges (36), and top edge (37). On the inner side walls of the box (17), there are fixing strips (39) at different heights. According to the thickness of the circuit board (16) under test and the interface position, a pair of fixing strips (39) at the same horizontal height and aligned with the interface of the motherboard (18) are selected as mounting strips. The circuit board (16) under test is pushed into the box (17) with the fixing strip (39) selected by its edge. Until the connector on its edge is aligned and connected with the corresponding interface on the fixed motherboard (18). When the circuit board (16) under test and the motherboard (18) are successfully connected, they form an integrated test unit. The test signal points of the circuit board (16) under test are led to the movable connector (19) through the wiring inside the motherboard (18).

10. The docking method according to claim 7, characterized in that, In step S2, one side interface of the motherboard (18) is connected to the rear end of the active connector (19) to establish an electrical path from the multi-core contact assembly of the active connector (19) to the motherboard (18). The mating pins on the fixed connector (10) are fully inserted into the sockets on the multi-core contact mating part of the movable connector (19); at the same time, the interface on the multi-core contact assembly of the movable connector (19) is also fully engaged with the corresponding interface on the fixed connector (10); Among them, the weak signal path is established by a group of shielded interfaces distributed on both sides. The shielded interfaces can effectively prevent crosstalk between signals and external electromagnetic interference. Power signal path: Established through the power signal interface group located in the middle, providing power connection; Conventional signal path: Established through the conventional signal interface group located below the power supply group; Establish multiple signal electrical paths from test equipment, test cable (11), fixed connector (10), movable connector (19), motherboard (18) to the circuit board under test (16).

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