A method for detecting a controller loaded with a high frequency reception module

Abstract

The application relates to a controller detection method loaded with a high-frequency receiving module, and the specific steps are as follows: S1, a shielding box is opened, a to-be-detected controller is placed into the shielding box, an I / O load board is used to send an instruction to a cylinder, the shielding box is closed, and meanwhile the to-be-detected controller is connected with a high-frequency generator through a high-frequency antenna; S2, a digital signal generator sends a signal to the high-frequency generator, so that the high-frequency generator modulates high frequency, the modulated high frequency is transmitted to the to-be-detected controller through the high-frequency antenna, and a high-frequency interference signal is applied to the to-be-detected controller; and S3, after the high-frequency receiving module in the to-be-detected controller receives the modulated high frequency, the high-frequency receiving module actively sends a signal to a CAN receiver through a CAN line, and the CAN receiver finally collects the signal at an industrial computer. By adopting the technical scheme, the controller detection method loaded with the high-frequency receiving module is provided, the process that a remote control operation controller transmits a high-frequency signal more than 30 meters away is simulated through cooperation of the digital signal generator and the high-frequency generator.

Description

Technical Field

[0001] This invention relates to a controller detection method, and more particularly to a controller detection method equipped with a high-frequency receiving module. Background Technology

[0002] A controller equipped with a high-frequency receiver module is an embedded control system that integrates a radio frequency (RF) high-frequency receiver module. Its core function is to receive, demodulate, and decode wireless high-frequency signals (such as 315MHz / 433MHz / 2.4GHz) and execute corresponding control commands. The controller is the core of wireless control, enabling long-distance, low-power, and stable wireless communication through the high-frequency receiver module. It is widely used in smart homes, industry, automobiles, security, and other fields.

[0003] Traditional controllers typically use a remote control as the high-frequency carrier when testing their high-frequency receiving performance. The performance of the high-frequency receiving module is confirmed by controlling the distance of the remote controller. The biggest challenge is that the test space requirement is large, generally ≥30 meters. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a controller detection method equipped with a high-frequency receiving module. By cooperating with a digital signal generator and a high-frequency generator, the process of remote control controller transmitting high-frequency signals from a distance of more than 30 meters is simulated to determine whether the high-frequency receiver can work normally. This solves the problem of the traditional method of two employees conducting auxiliary detection at a distance of more than 30 meters, reducing the number of people from two to one. At the same time, as an automatic monitoring process, it reduces human interference factors.

[0005] The technical solution of this invention: A controller detection method with a high-frequency receiving module, comprising an industrial control computer, an I / O load board, a digital signal generator, a high-frequency generator, a shielded box, and a CAN receiver. The I / O load board, the digital signal generator, and the CAN receiver are all connected to the industrial control computer. The output terminal of the digital signal generator is connected to the input terminal of the high-frequency generator. A shielding box is used to house the controller under test (DUT). The shielding box provides an independent electromagnetic shielding space for the DUT from high-frequency electromagnetic interference outside the box. The shielding box includes an upper cover and a lower cover, which are connected by a cylinder. The upper cover rotates relative to the lower cover under the drive of the cylinder. I / O load board, used for opening and closing the cylinder of the load shield box; A digital signal generator that outputs excitation / modulation signals and sends them to a high-frequency generator; A high-frequency signal generator modulates the excitation / modulation signal into a high frequency and connects it to the controller under test via a high-frequency antenna to apply a high-frequency interference signal to the controller under test. The CAN receiver connects to the controller under test (DUT) via a CAN cable, receives CAN messages sent by the DUT, and sends them back to the industrial computer. The specific testing method is as follows: S1, Placement of the controller under test: Open the shielding box, place the controller under test into the shielding box, send a command to the cylinder through the I / O load board, and the cylinder drives the upper cover to rotate and close, thereby closing the shielding box. At the same time, the controller under test is connected to the high-frequency generator through the high-frequency antenna. S2, electromagnetic interference verification is performed on the high-frequency receiving module inside the controller under test. The digital signal generator sends a signal to the high-frequency generator, which modulates the high frequency. The modulated high frequency is transmitted to the controller under test through the high-frequency antenna, and a high-frequency interference signal is applied to the controller under test. S3: After the high-frequency receiving module inside the controller under test receives the modulated high frequency, it actively sends a signal to the CAN receiver through the CAN line. The CAN receiver eventually aggregates the signal to the industrial control computer.

[0006] The above technical solution is mainly used to test the high-frequency receiver in the controller under test (DUT). Through the cooperation of a digital signal generator and a high-frequency generator, the process of remotely controlling the controller to transmit high-frequency signals from a distance greater than 30 meters is simulated to determine whether the high-frequency receiver can function properly. The DUT collects field signals, performs logical operations, and outputs control commands. The digital signal generator outputs precise digital trigger / modulation signals to control the high-frequency generator to generate interference signals of specific frequencies and amplitudes, as well as high-frequency radio frequency (RF) signals, to simulate RF interference and wireless communication signals. A stable RF carrier is generated through frequency synthesis technology, and then amplitude / frequency / phase modulation is superimposed to simulate real interference or communication scenarios. Simultaneously, the functionality of the DUT is monitored for abnormalities, verifying its anti-RF interference capability. This integrated approach performs performance testing on the controller's receiving module. It solves the problem of requiring two employees for auxiliary testing at distances greater than 30 meters, reducing the number of people needed to one, and also reduces human interference factors as an automated monitoring process.

[0007] A further feature of the present invention is that the lower cover is provided with a loading plate and a first driving component that drives the loading plate to slide horizontally within the shielding box. The loading plate is provided with a detachable first loading clamp or a second loading clamp. Both loading clamps include a tray and several positioning blocks on the tray. The tray is detachably connected to the loading plate, and a positioning area is formed between each positioning block for the controller to be tested to be placed.

[0008] One side of the upper cover is rotatably connected to the lower cover via a hinge, allowing the upper cover to rotate around one side of the lower cover to open or close; the cylinder body is mounted on the lower cover, and the cylinder's output shaft is connected to the upper cover, driving the upper cover to rotate around the hinge to move closer to or away from the lower cover, thereby realizing the opening and closing of the shielding box.

[0009] By adopting the above-mentioned further configuration, and by setting replaceable first and second loading fixtures on the loading plate, compatible testing of controllers under test of different models and structures is achieved, avoiding the need for complete equipment replacement, greatly improving the equipment's versatility and adaptability, and reducing the equipment cost for multi-variety testing. The shielding box adopts a hinged opening and closing structure, which, together with the lifting device and the control buttons on the electrical control box, realizes the automatic opening and closing of the shielding box, replacing the traditional manual opening method. This makes operation convenient and labor-saving, while ensuring the rapid establishment of the shielding environment required for high-frequency testing. The positioning blocks on the tray form a positioning area, allowing the controller under test to be quickly placed and positioned, simplifying the clamping process, significantly improving the testing cycle time, and making it suitable for mass production testing scenarios.

[0010] A further feature of the present invention is that the first loading fixture further includes a needle block mounting base, which is mounted on the loading plate. The needle block mounting base is provided with a first connector and a first probe block. The first probe block is provided with a plurality of first probes that contact the test points of the controller under test.

[0011] With the above-mentioned further configuration, the first loading fixture is equipped with a pin block mounting base and a first probe block, providing a dedicated probe contact interface for a specific model of controller under test, ensuring accurate alignment of the test point and the probe, effectively reducing the risk of poor contact. When the first driving component drives the loading plate to slide horizontally, the test point on the controller under test contacts and conducts with the first probe of the first probe block; the probe signal is centrally extracted through the first connector, providing a stable and low-loss signal transmission path for the high-frequency receiving module, reducing signal interference, and ensuring the accuracy and reliability of high-frequency signal testing.

[0012] A further provision of the present invention: the second loading fixture further includes a second connector and a second probe block mounted on a tray, the second probe block having a plurality of second probes that contact the test points of the controller under test.

[0013] By adopting the above-mentioned further configuration, and by setting up an independent second loading fixture, the device can be compatible with another model of controller under test, realizing the function of testing multiple products with one device, avoiding repeated equipment investment, and improving equipment utilization. The second connector and the second probe block form an independent signal acquisition path, which can be individually adapted to the pin definitions and signal characteristics of different controller models, avoiding signal crosstalk between different products, and improving the versatility and stability of the test.

[0014] A further feature of the present invention is that the bottom of the tray is provided with a magnet, and the loading plate is provided with a magnetic induction device. When the tray is assembled on the loading plate, the magnet and the magnetic induction device are arranged in a corresponding manner.

[0015] With the above-mentioned further configuration, the magnet at the bottom of the tray cooperates with the magnetic induction on the loading plate to achieve rapid adsorption and positioning of the tray, eliminating the need for complex alignment actions, making loading and unloading convenient, and greatly improving the efficiency of fixture replacement; the magnetic attraction force can make the tray fit tightly with the loading plate, preventing the tray from moving during sliding or testing, ensuring the stability of the fixture installation, and indirectly improving the reliability of probe contact.

[0016] A further embodiment of the present invention includes: a pressure plate assembly provided on the inner top wall of the upper cover; the pressure plate assembly includes a fixed plate, a pressure plate, and a second driving member for driving the pressure plate to move up and down; the fixed plate is detachably installed on the inner top wall of the upper cover; the second driving member is fixedly installed on the fixed plate; and the pressure plate is directly or indirectly installed on the output shaft of the second driving member; when the upper cover is closed, the pressure plate is pressed onto the controller under test by the action of the second driving member.

[0017] With the above-mentioned further configuration, after the top cover is closed, the second cylinder operates, driving the pressure plate to move downwards. The pressure plate presses onto the upper surface of the controller under test, providing comprehensive positioning of the controller and preventing displacement from affecting the test. It also prevents poor probe contact caused by controller warping or gaps, ensuring stable contact at all test points. The pressure plate assembly can be adapted and adjusted according to the thickness and size of different controllers under test, and the pressure can be adjusted through the second drive component, avoiding hard contact that could damage the controller and improving compatibility with different products.

[0018] A further feature of the present invention is that the tray is assembled onto the loading plate by screws, the loading plate is provided with four guide posts, and the tray is provided with corresponding guide holes. When the tray is installed with the loading plate, the guide posts are located in the guide holes, and guide sleeves are also provided in the guide holes.

[0019] By adopting the above-mentioned further settings, the tray is installed and positioned for quick installation, which also facilitates subsequent screw assembly. This ensures the consistency of the probe and test point positions after fixture replacement, eliminating the need for repeated calibration. The guide sleeve design prevents wear between the guide post and the guide hole.

[0020] A further embodiment of the present invention includes: a base plate and two support seats disposed on the base plate inside the shielding box; a first driving member disposed between the two support seats; the output shaft of the first driving member being directly or indirectly connected to the loading plate; a slide rail disposed on both support seats; and a slider disposed on the loading plate, the slider being guided and slidably engaged with the slide rail.

[0021] Further design: Both support bases are equipped with stops at both ends of the slide rail to limit the movement of the slider.

[0022] By adopting the above-mentioned further settings, the sliding of the slider and the guide rail makes the structure stable when the loading plate slides, avoiding displacement of the controller under test on the fixture, which would affect the detection effect. When the first driving component drives the loading plate to slide, the stop can activate the limiting function to prevent the slider from sliding too far and detaching from the guide rail, causing the loading fixture to deviate and affecting the detection. After the slider contacts the stop, the slider can no longer slide and can only slide in the opposite direction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the connection of each component in the detection method of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of a specific embodiment of the present invention, showing a long strip controller placed inside a shielded box; Figure 3 This is a schematic diagram of the first loading fixture according to a specific embodiment of the present invention; Figure 4 This is a schematic diagram of a long strip controller according to a specific embodiment of the present invention; Figure 5 This is a schematic diagram showing the position of the pressure plate assembly in a specific embodiment of the present invention; Figure 6 This is a schematic diagram of a specific embodiment of the present invention, showing the rectangular controller placed inside a shielded box; Figure 7 This is a schematic diagram of the second loading fixture according to a specific embodiment of the present invention; Figure 8 This is a bottom schematic diagram of the rectangular controller according to a specific embodiment of the present invention; Figure 9 This is a schematic diagram of the bottom of the tray according to a specific embodiment of the present invention; Figure 10 This is a schematic diagram of the carrier plate in a specific embodiment of the present invention.

[0024] In the diagram, 1. Electrical control box; 11. On / off switch; 12. Control button; 13. Handle; 2. Shielding box; 21. Top cover; 211. Shielding protrusion; 22. Bottom cover; 221. Shielding groove; 23. Hinge; 24. Base plate; 25. Support base; 251. Slide rail; 252. Stop block; 3. Lifting device; 4. Loading plate; 41. Guide column; 42. Magnetic induction; 43. Slider; 5. First driving component; 6. First loading fixture; 61. Needle block mounting base; 611. First connector; 612. First probe block; 7. Second loading fixture; 71. Second connector; 72. Second probe block; 8. Screw; 9. Pressure plate assembly; 91. Fixing plate; 92. Pressure plate; 93. Second drive component; 101. Tray; 1011. Positioning post; 1012. Guide hole; 1013. Magnet; 102. Positioning block; 1021. Boss; 103. Positioning area; 200. Long strip controller; 300. Rectangular controller. Detailed Implementation

[0025] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that in the description of this invention, all directional indications (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0027] Furthermore, in this invention, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0029] like Figure 1-10As shown, a controller detection method with a high-frequency receiving module includes an industrial computer, an I / O load board, a digital signal generator, a high-frequency generator, a shielded box 2, and a CAN receiver. The I / O load board, digital signal generator, and CAN receiver are all connected to the industrial computer. The output of the digital signal generator is connected to the input of the high-frequency generator. The shielding box 2 is used to place the controller under test. The shielding box 2 provides an independent electromagnetic shielding space for the controller under test to shield against high-frequency electromagnetic interference outside. The shielding box 2 includes an upper cover 21 and a lower cover 22. The upper cover 21 and the lower cover 22 are connected by a cylinder. The upper cover 21 rotates relative to the lower cover 22 under the drive of the cylinder. I / O load board, used for opening and closing the cylinder of load shield box 2; A digital signal generator that outputs excitation / modulation signals and sends them to a high-frequency generator; A high-frequency signal generator modulates the excitation / modulation signal into a high frequency and connects it to the controller under test via a high-frequency antenna to apply a high-frequency interference signal to the controller under test. The CAN receiver connects to the controller under test (DUT) via a CAN cable, receives CAN messages sent by the DUT, and sends them back to the industrial computer. The specific testing method is as follows: S1, Placement of the controller under test: Open the shielding box 2, place the controller under test into the shielding box 2, send a command to the cylinder through the I / O load board, and the cylinder drives the upper cover 21 to rotate and close, thereby closing the shielding box 2. At the same time, the controller under test is connected to the high frequency generator through the high frequency antenna. S2, electromagnetic interference verification is performed on the high-frequency receiving module inside the controller under test. The digital signal generator sends a signal to the high-frequency generator, which modulates the high frequency. The modulated high frequency is transmitted to the controller under test through the high-frequency antenna, and a high-frequency interference signal is applied to the controller under test. S3: After the high-frequency receiving module inside the controller under test receives the modulated high frequency, it actively sends a signal to the CAN receiver through the CAN line. The CAN receiver eventually aggregates the signal to the industrial control computer.

[0030] The testing method is mainly used to test the high-frequency receiver in the controller under test (DUT). Through the cooperation of a digital signal generator and a high-frequency generator, it simulates the process of a remote-controlled controller transmitting a high-frequency signal from a distance of more than 30 meters to determine whether the high-frequency receiver can function properly. The DUT collects field signals, performs logical operations, and outputs control commands. The digital signal generator outputs precise digital trigger / modulation signals to control the high-frequency generator to generate interference signals of specific frequencies and amplitudes, as well as high-frequency radio frequency (RF) signals, to simulate RF interference and wireless communication signals. A stable RF carrier is generated through frequency synthesis technology, and then amplitude / frequency / phase modulation is superimposed to simulate real interference or communication scenarios. Simultaneously, the functionality of the DUT is monitored for abnormalities, verifying its anti-RF interference capability. This integrated approach performs performance testing on the controller's receiver module. It solves the problem of requiring two employees for auxiliary testing at distances greater than 30 meters, reducing the number of people needed to one, and also reduces human interference factors as an automated monitoring process.

[0031] Using the I / O load board: verify the DI / DO channel response and logic control correctness; drive the cylinder using the I / O load board; open and close the shielded box 2; and connect the controller under test to the high-frequency antenna.

[0032] Electromagnetic interference immunity verification: Inside shielded box 2, radio frequency interference was received via a high-frequency antenna to verify the functional stability under industrial electromagnetic environment.

[0033] Ensure that the controller does not malfunction or crash under scenarios such as motor start-up and shutdown, wireless interference, and power grid fluctuations.

[0034] Specifically, the structure of the shielding box 2 is as follows: one side of the upper cover 21 is rotatably connected to the lower cover 22 via a hinge 23, allowing the upper cover 21 to rotate around one side of the lower cover 22 to open or close; the cylinder body is mounted on the lower cover 22, and the output shaft of the cylinder is connected to the upper cover 21. The cylinder drives the upper cover 21 to rotate around the hinge 23, moving closer to or away from the lower cover 22, thereby opening and closing the shielding box 2. The lower cover 22 is provided with a loading plate 4 and a first driving member 5 that drives the loading plate 4 to slide horizontally within the shielding box 2. The loading plate 4 is provided with a detachable first loading clamp 6 or a second loading clamp 7. Both loading clamps include a tray 101 and several positioning blocks 102 disposed on the tray 101. The tray 101 is detachably connected to the loading plate 4. A positioning area 103 is formed between 02 for the controller under test to be placed; by setting replaceable first and second loading fixtures 7 on the loading plate 4, compatible testing of controllers under test of different models and structures is realized, avoiding the need for complete equipment replacement, greatly improving the versatility and adaptability of the equipment, and reducing the equipment cost for multi-variety testing; the shielding box 2 adopts a hinge 23 type opening and closing structure, which, together with the lifting device 3 and the control button 12 on the electrical control box 1, realizes the automatic opening and closing of the shielding box 2, replacing the traditional manual opening method, which is convenient and labor-saving, while ensuring the rapid establishment of the shielding environment required for high-frequency testing. The positioning block 102 on the tray 101 forms the positioning area 103, and the controller under test can be quickly placed and positioned, simplifying the clamping process, significantly improving the test cycle, and is suitable for batch production testing scenarios. The shielding box 2 can fix two controllers with different structures. The first loading fixture 6 fixes the long strip controller and puts the long strip controller into the positioning area 103 on the first loading fixture 6. The second loading fixture 7 fixes the rectangular controller and puts the rectangular controller into the positioning area 103 on the second loading fixture 7 from top to bottom. The long strip controller and the rectangular controller cannot be placed in the testing equipment at the same time for testing. They can only be placed separately. The high-frequency antenna extends from the side wall of the shielding box 2 into the inside of the shielding box 2 (not shown in the figure) and transmits the high-frequency signal to the controller under test.

[0035] The bottom of the shielded box 2 is equipped with an electrical control box 1. The electrical control box 1 is equipped with an on / off switch 11 and a control button 12 for driving the lifting device 3. The rear wall of the electrical control box 1 is equipped with an AC power interface with a fuse, a control interface, and a pneumatic valve module. The electrical control box 1 contains a circuit board. The AC power interface is connected to 220V AC mains power through a power cord to directly power the electrical control box 1. The control interface is connected to an external host computer or PLC through a serial cable. The signal cable is connected to the electrical control box 1. The rear wall of the shielded box 2 is equipped with a through-wall signal interface and a pneumatic connector. The through-wall signal interface has a male connector on the outside and a female connector on the inside, which enables the signal to penetrate the wall of the shielded box 2 for transmission. The two are fixed by the box wall flange to achieve the internal and external penetration of high frequency / detection signals, while ensuring the electromagnetic sealing of the shielded box 2. The external air source is connected to the pneumatic connector, controlled by the hand valve module, and connected to the cylinder through the air pipe to drive the mechanism. The female connector can be directly plugged into the connector of the first loading clamp 6 or the second loading clamp 7 through a cable / ribbon cable to introduce the high frequency / electrical signal from outside the box into the box at once.

[0036] Specifically, the first loading fixture 6 further includes a pin block mounting base 61, which is mounted on the loading plate 4. The pin block mounting base 61 is provided with a first connector 611 and a first probe block 612. The first probe block 612 is provided with a plurality of first probes that contact the test points of the controller under test. The addition of the pin block mounting base and the first probe block 612 to the first loading fixture 6 provides a dedicated probe contact interface for a specific model of controller under test, ensuring accurate alignment of the test points and probes and effectively reducing the risk of poor contact. When the first driving component 5 drives the loading plate 4 to slide horizontally, the test points on the controller under test contact and conduct with the first probes of the first probe block 612. The first connector 611 enables the centralized output of probe signals, providing a stable and low-loss signal transmission path for the high-frequency receiving module, reducing signal interference, and ensuring the accuracy and reliability of high-frequency signal testing.

[0037] Specifically, the second loading fixture 7 also includes a second connector 71 and a second probe block 72 mounted on the tray 101. The second probe block 72 is provided with several second probes that contact the test points of the controller under test. By setting up an independent second loading fixture 7, the device can be compatible with another model of controller under test, realizing the function of testing multiple products with one device, avoiding repeated equipment investment and improving equipment utilization. The second connector 71 and the second probe block 72 form an independent signal acquisition path, which can be individually adapted to the pin definitions and signal characteristics of different models of controllers, avoiding signal crosstalk between different products and improving the universality and stability of the test.

[0038] Each positioning block 102 corresponds to one of the four corners of the controller under test. The inner wall of the positioning block 102 is provided with a boss 1021. The controller under test is mounted on the boss 1021. The boss 1021 structure on the inner wall of the positioning block 102 provides a stable support surface for the controller under test, avoiding scratches or wear caused by direct contact between the bottom surface of the controller and the tray 101, thus protecting the appearance of the product. The boss 1021 structure ensures that the controller is only subjected to force at the four corners, and the sides are completely open, which facilitates quick picking and placing by manual or robotic arms. At the same time, it forms a stable positioning reference, preventing the controller from undergoing horizontal displacement during the testing process and improving the positioning accuracy.

[0039] The tray 101 is equipped with positioning posts 1011 for positioning the controller under test (DUT). When the DUT is placed in the positioning area 103, it snaps into the positioning posts 1011. The positioning posts 1011 on the tray 101 can mate with corresponding holes on the DUT to achieve foolproof snap-in positioning, effectively preventing the controller from being placed backwards or off-center, ensuring accurate alignment of the probe and test point, and avoiding test failure caused by mis-contact or contact deviation. The positioning posts 1011 and the positioning block 102 work together to form a double positioning constraint, effectively limiting the horizontal and vertical displacement of the controller, preventing the controller from shifting due to vibration or pressure from the pressure plate 92 during the testing process, and improving accuracy. This improves the stability and consistency of the test. The tray 101 is assembled onto the loading plate 4 by screws 8, making the loading fixture and the loading plate 4 detachable. The loading plate 4 is provided with four guide posts 41, and the tray 101 is provided with corresponding guide holes 1012. When the tray 101 and the loading plate 4 are installed, the guide posts 41 are located in the guide holes 1012. The guide holes 1012 are also provided with guide sleeves to position the tray 101 for quick installation and facilitate subsequent screw assembly. This ensures the consistency of the probe and test point positions after fixture replacement, eliminating the need for repeated calibration. The guide sleeves prevent wear between the guide posts 41 and the guide holes 1012.

[0040] The bottom of the tray 101 is provided with a magnet 1013, and the loading plate 4 is provided with a magnetic induction device 42. When the tray 101 is assembled on the loading plate 4, the magnet 1013 and the magnetic induction device 42 are correspondingly arranged. The magnet 1013 at the bottom of the tray 101 cooperates with the magnetic induction device 42 on the loading plate 4 to achieve rapid adsorption and positioning of the tray 101 without complicated alignment actions, making loading and unloading convenient and greatly improving the efficiency of fixture replacement. The adsorption force of the magnet 1013 can make the tray 101 fit tightly with the loading plate 4, preventing the tray 101 from moving during sliding or detection, ensuring the stability of the fixture installation, and indirectly improving the reliability of probe contact.

[0041] The inner top wall of the upper cover 21 is provided with a pressure plate assembly 9. The pressure plate assembly 9 includes a fixed plate 91, a pressure plate 92, and a second driving member 93 that drives the pressure plate 92 to move up and down. The fixed plate 91 is detachably installed on the inner top wall of the upper cover 21. The second driving member 93 is fixedly installed on the fixed plate 91. The pressure plate 92 is directly or indirectly installed on the output shaft of the second driving member 93. When the upper cover 21 is closed, the pressure plate 92 is pressed onto the controller under test under the action of the second driving member 93. After the upper cover 21 is closed, the second cylinder works and drives the pressure plate 92 to move down. The pressure plate 92 is pressed onto the upper end face of the controller under test, which provides comprehensive positioning of the controller under test, avoids displacement affecting the test, and also prevents poor probe contact caused by controller warping or gaps. It ensures stable contact of all test points. The pressure plate assembly 9 can be adapted and adjusted according to the thickness and size of different controllers under test. The pressure can be adjusted by the second driving member 93, avoiding hard contact that could damage the controller and improving compatibility with different products.

[0042] The shielding box 2 contains a base plate 24 and two support seats 25 mounted on the base plate 24. The first driving member 5 is located between the two support seats 25, and its output shaft is directly or indirectly connected to the loading plate 4. Each support seat 25 is equipped with a slide rail 251, and the loading plate 4 is equipped with a slider 43. The slider 43 is guided and slidably engaged with the slide rail 251. Each support seat 25 has a stop block 252 at both ends of the slide rail 251 to limit the slider 43. Through the guided sliding engagement of the slider 43 and the slide rail 251, the loading plate 4 remains structurally stable during sliding, preventing displacement of the controller under test on the fixture and affecting the detection effect. When the first driving member 5 drives the loading plate 4 to slide, the stop block 252 can activate its limiting function to prevent the slider 43 from sliding over-prone. If the slider detaches from the guide rail, the loading fixture will deviate, affecting the detection. After the slider 43 contacts the stop 252, the slider 43 can no longer slide and can only slide in the opposite direction. The bottom of the shielding box 2 is equipped with a bakelite board, and the base plate 24 is mounted on the circuit board. Since the shielding box 2 is generally made of metal, the bakelite board has high insulation strength and is used to isolate the live parts from the metal frame to ensure accurate detection signals and prevent misjudgments. The controller has a high-frequency receiving module that is sensitive to electromagnetic interference. The bakelite board is non-conductive and non-magnetic, and will not reflect, absorb or interfere with high-frequency signals like metal. It can reduce noise interference and improve detection stability. During the test, instantaneous arcing, overcurrent and heat may occur. The bakelite board is heat-resistant, arc-resistant and not easily combustible, which can prevent instantaneous arcing of the probe from damaging the equipment or controller and improve safety.

[0043] At least one shielding groove 221 is provided adjacent to each other along the length direction on the mating surface of the lower cover 22 that fits with the upper cover 21. A shielding protrusion 211, matching each shielding groove 221, is provided adjacent to each other along the length direction on the mating surface of the upper cover 21 that fits with the lower cover 22. The height of the shielding protrusion 211 is equal to or less than the depth of the shielding groove 221, ensuring close contact between the shielding groove 221 and the shielding protrusion 211. Preferably, the lower cover 22 has one shielding groove 221, which is arranged circumferentially around the lower cover 22. The upper cover 21 has one shielding protrusion 211 corresponding to the shielding groove 221, ensuring an effective shielding space is achieved when the upper cover 21 and the lower cover 22 are fastened together.

[0044] Handles 13 are provided on both sides of the electrical control box 1 or the lower cover 22 for easy handling. The electrical control box 1 contains a circuit board, and two green closing buttons electrically connected to the circuit board are located on the upper surface of the electrical control box 1. The two closing buttons are parallel and spaced a certain distance apart. When the shielding box 2 is in the open state, if it is necessary to close the shielding box 2 for testing, both closing buttons must be pressed simultaneously with both hands to send a control signal to close the shielding box 2, causing the upper cover 21 to rotate and press down to close with the lower cover 22, thus preventing hand pinching. Specifically, pressing the two green closing buttons simultaneously causes two double-acting cylinders to receive air, driving the upper cover 21 to rotate and press down, closing the upper cover 21. A red opening button electrically connected to the circuit board is located between the two closing buttons. When it is necessary to open the closed shielding box 2, pressing the red opening button causes the upper cover 21 to press down and rotate away from the lower cover 22, opening the shielding box 2.

Claims

1. A method for detecting a controller equipped with a high-frequency receiving module, characterized in that, The system includes an industrial control computer, an I / O load board, a digital signal generator, a high-frequency generator, a shielded box (2), and a CAN receiver. The I / O load board, digital signal generator, and CAN receiver are all connected to the industrial control computer. The output of the digital signal generator is connected to the input of the high-frequency generator. The shielding box (2) is used to place the controller under test. The high-frequency electromagnetic interference outside the shielding box (2) provides an independent electromagnetic shielding space for the controller under test. The shielding box (2) includes an upper cover (21) and a lower cover (22). The upper cover (21) and the lower cover (22) are connected by a cylinder. The upper cover (21) rotates relative to the lower cover (22) under the drive of the cylinder. I / O load board, used for opening and closing the cylinder of the load shield box (2); A digital signal generator that outputs excitation / modulation signals and sends them to a high-frequency generator; A high-frequency signal generator modulates the excitation / modulation signal into a high frequency and connects it to the controller under test via a high-frequency antenna to apply a high-frequency interference signal to the controller under test. The CAN receiver connects to the controller under test (DUT) via a CAN cable, receives CAN messages sent by the DUT, and sends them back to the industrial computer. The specific testing method is as follows: S1, Placement of the controller under test, opening the shielding box (2), placing the controller under test into the shielding box (2), sending a command to the cylinder through the I / O load board, the cylinder drives the upper cover (21) to rotate and close, thereby closing the shielding box (2), and at the same time the controller under test is connected to the high frequency generator through the high frequency antenna; S2, electromagnetic interference verification is performed on the high-frequency receiving module inside the controller under test. The digital signal generator sends a signal to the high-frequency generator, which modulates the high frequency. The modulated high frequency is transmitted to the controller under test through the high-frequency antenna, and a high-frequency interference signal is applied to the controller under test. S3: After the high-frequency receiving module inside the controller under test receives the modulated high frequency, it actively sends a signal to the CAN receiver through the CAN line. The CAN receiver eventually aggregates the signal to the industrial control computer.

2. The controller detection method for a high-frequency receiving module according to claim 1, characterized in that, The lower cover (22) is provided with a loading plate (4) and a first drive (5) that drives the loading plate (4) to slide horizontally within the shielding box (2). The loading plate (4) is provided with a detachable first loading clamp (6) or a second loading clamp (7). Both loading clamps include a tray (101) and several positioning blocks (102) on the tray (101). The tray (101) is detachably connected to the loading plate (4), and a positioning area (103) is formed between each positioning block (102) for the controller under test to be placed.

3. The controller detection method for loading a high-frequency receiving module according to claim 2, characterized in that, The first loading fixture (6) further includes a needle block mounting base (61), which is mounted on the loading plate (4). The needle block mounting base (61) is provided with a first connector (611) and a first probe block (612). The first probe block (612) is provided with a plurality of first probes that contact the test points of the controller under test.

4. The controller detection method for loading a high-frequency receiving module according to claim 2, characterized in that, The second loading fixture (7) also includes a second connector (71) and a second probe block (72) mounted on a tray (101), the second probe block (72) having a plurality of second probes that contact the test points of the controller under test.

5. The controller detection method for a high-frequency receiving module according to claim 2, characterized in that, One side of the upper cover (21) is rotatably connected to the lower cover (22) via a hinge (23), so that the upper cover (21) rotates around one side of the lower cover (22) to open or close; the cylinder body is mounted on the lower cover (22), and the output shaft of the cylinder is connected to the upper cover (21). The cylinder drives the upper cover (21) to rotate around the hinge (23) to move closer to or away from the lower cover (22), thereby realizing the opening and closing of the shielding box (2).

6. The controller detection method for loading a high-frequency receiving module according to claim 2, characterized in that, The bottom of the tray (101) is provided with a magnet (1013), and the loading plate (4) is provided with a magnetic induction (42). When the tray (101) is assembled on the loading plate (4), the magnet (1013) and the magnetic induction (42) are arranged correspondingly.

7. The controller detection method for a high-frequency receiving module according to claim 2, characterized in that, The inner top wall of the upper cover (21) is provided with a pressure plate assembly (9). The pressure plate assembly (9) includes a fixed plate (91), a pressure plate (92), and a second driving member (93) that drives the pressure plate (92) to move up and down. The fixed plate (91) is detachably installed on the inner top wall of the upper cover (21). The second driving member (93) is fixedly installed on the fixed plate (91). The pressure plate (92) is directly or indirectly installed on the output shaft of the second driving member (93). When the upper cover (21) is fastened, the pressure plate (92) is pressed onto the controller under test by the action of the second driving member (93).

8. The controller detection method for loading a high-frequency receiving module according to claim 2, characterized in that, The tray (101) is assembled onto the loading plate (4) by screws (8). The loading plate (4) is provided with four guide posts (41). The tray (101) is provided with corresponding guide holes (1012). When the tray (101) and the loading plate (4) are installed, the guide posts (41) are located in the guide holes (1012). The guide holes (1012) are also provided with guide sleeves.

9. The controller detection method for a high-frequency receiving module according to claim 2, characterized in that, The lower cover (22) is provided with a base plate (24) and two support seats (25) on the base plate (24). The first driving member (5) is located between the two support seats (25). The output shaft of the first driving member (5) is directly or indirectly connected to the loading plate (4). Both support seats (25) are provided with slide rails (251). The loading plate (4) is provided with a slider (43). The slider (43) is guided and slidably cooperates with the slide rail (251).

10. The controller detection method for loading a high-frequency receiving module according to claim 9, characterized in that, Both support bases (25) are equipped with stops (252) at both ends of the slide rail (251) to limit the slider (43).

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