Circuit board tooling testing device and method

Abstract

The present invention provides a circuit board tooling testing device and method, comprising an excitation area module and at least one circuit board test area module; the excitation area module comprises a test control board with a test control program burned in it; the circuit board test area module comprises a test board positioning slot and a test ejector base plate for establishing a connection with a circuit board to be tested, the test ejector base plate and the test board positioning slot being assembled and connected; the test control board and the test ejector base plate are detachably connected for communication; the present invention burns a test control program in the test control board of the excitation area module for sending messages to the circuit board to be tested, thereby promoting automated testing of the circuit board; the test ejector base plate and the test board positioning slot are designed in the circuit board test area; for different circuit boards, only different test ejector base plates and test board positioning slots need to be replaced to adapt to different circuit board tooling tests, thereby improving the testing efficiency of the circuit board.

Description

[0001] This case is a divisional application based on the invention patent with application date of May 11, 2024, application number 202410578320.9, and name “A device and method for circuit board detection” as the parent case. Technical Field

[0002] The present invention relates to the technical field of circuit board test signal transmission, and in particular to a circuit board tooling test device and method. Background Art

[0003] With the rapid development of the Internet of Things (IoT), embedded devices are becoming increasingly common in industrial production. To improve the efficiency of embedded device production, batch testing of circuit boards is crucial. Embedded device circuit boards come in a wide variety of types, requiring customized test fixtures and processes. Consequently, current circuit board testing is still relatively unautomated, resulting in lengthy testing times and low efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a circuit board tooling testing device and method with higher testing efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A circuit board tooling test device comprises an excitation area module and at least one circuit board test area module;

[0007] The excitation area module includes a test control board with a test control program burned into it;

[0008] The circuit board test area module includes a test board positioning slot and a test ejector base plate for establishing a connection with the circuit board to be tested, and the test ejector base plate is assembled and connected to the test board positioning slot;

[0009] The test control board and the test ejector base plate are detachably connected in communication.

[0010] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0011] A circuit board tooling testing method, using the circuit board tooling testing device described above, wherein the test control board establishes a communication connection with the circuit board to be tested, which has been pre-burned with a test program, via the test ejector base plate;

[0012] The test control board sends a query message to the circuit board to be tested;

[0013] The circuit board to be tested calls the test module to perform the test according to the query message and generates a reply message;

[0014] The test control board receives the reply message returned by the circuit board to be tested and obtains the test result.

[0015] The beneficial effects of the present invention are as follows: a circuit board tooling test device and method of the present invention are designed with an excitation area module and a circuit board test area module, a test control program is burned in the test control board of the excitation area module, and is used to send messages to the circuit board to be tested, thereby promoting the automated testing of the circuit board; at the same time, a test ejector base plate and a test board positioning slot are designed in the circuit board test area; for different circuit boards, only different test ejector base plates and test board positioning slots need to be replaced to adapt to different circuit board tooling tests, thereby improving the testing efficiency of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram illustrating an example circuit connection of an excitation zone module of a circuit board tooling test device according to an embodiment of the present invention;

[0017] Figure 2 This is an example diagram of the circuit connection of the CCU board test area module of a circuit board tooling test equipment according to an embodiment of the present invention;

[0018] Figure 3 This is an example diagram of the circuit connection of the PCU board test area module of a circuit board tooling test equipment according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of some components of a circuit board tooling test equipment according to an embodiment of the present invention;

[0020] Figure 5 This is an example diagram of test steps of a circuit board tooling test method according to an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the communication flow of a circuit board fixture testing method according to an embodiment of the present invention;

[0022] Figure 7 This is a communication flow sequence diagram of a circuit board fixture testing method according to an embodiment of the present invention;

[0023] Description of labels:

[0024] 1. Test board positioning slot; 2. Side vertical plate; 3. Test ejector base plate; 4. Fixing plate; 5. Tooling bottom surface; 6. Front vertical plate; 7. Back vertical plate; 8. Side plate; 9. Connecting plate; 10. Bottom piece. DETAILED DESCRIPTION

[0025] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0026] Please refer to Figures 1 to 4 , a circuit board tooling test device, comprising an excitation area module and at least one circuit board test area module;

[0027] The excitation area module includes a test control board with a test control program burned into it;

[0028] The circuit board test area module includes a test board positioning slot and a test ejector base plate for establishing a connection with the circuit board to be tested, and the test ejector base plate is assembled and connected to the test board positioning slot;

[0029] The test control board and the test ejector base plate are detachably connected in communication.

[0030] From the above description, it can be seen that the beneficial effects of the present invention are: a circuit board tooling test equipment of the present invention is designed with an excitation area module and a circuit board test area module, and a test control program is burned in the test control board of the excitation area module to send messages to the circuit board to be tested, thereby promoting the automated testing of the circuit board. At the same time, a test pin base plate and a test board positioning slot are designed in the circuit board test area. For different circuit boards, it is only necessary to replace different test pin base plates and test board positioning slots to adapt to different circuit board tooling tests, thereby improving the testing efficiency of the circuit board.

[0031] Furthermore, there are two circuit board test area modules, namely a CCU board test area module and a PCU board test area module.

[0032] As can be seen from the above description, the circuit board test area includes the CCU board test area and the PCU board test area, and can adapt to the automated testing of the CCU board and the PCU board.

[0033] Furthermore, the excitation zone module further includes a switch;

[0034] The test control board is connected to the switch via a network cable;

[0035] The switch is detachably connected to the test ejector base plate via a network cable.

[0036] As can be seen from the above description, the test control board and the test ejector base plate include a communication connection based on a network cable, thereby maintaining Ethernet communication between the two.

[0037] Furthermore, the excitation zone module also includes a switching power supply, a voltage source, a current control board, a relay board and a wiring harness slot;

[0038] The switching power supply is electrically connected to the voltage source and the wiring harness slot;

[0039] The relay board is electrically connected to the voltage source and the current control board respectively;

[0040] The relay board is connected to the wiring harness slot;

[0041] The wiring harness slot is connected to the test control board;

[0042] Each test interface of the test control board is connected to the corresponding interface of the test ejector base plate through the harness slot.

[0043] From the above description, it can be seen that the switching power supply provides the required power supply for the test tooling, such as providing voltage and current sources, which can meet the test requirements by adjusting the output voltage and current, and has stability and adjustability; the voltage source is used to provide a specific voltage signal, which can be used to measure the voltage of the circuit board under test or simulate actual working conditions, and can usually provide a stable and adjustable voltage supply; the current control board is used to generate a specific current signal, which is used to measure the current of the circuit board under test or simulate actual working conditions; the relay board is usually used to control the switching or connection of the circuit, and realizes the switching of test signals, connection and disconnection of circuits, etc. by opening and closing the relay, and is used for signal routing and switching of different parts in the test tooling; the wiring harness slot is used to plug and unplug the wiring harnesses of various components and circuits in the test tooling, and can provide an interface for the connection between the components.

[0044] Furthermore, the excitation area module further includes a voltage detection module, an insulation module, a current detection module and a temperature sensor;

[0045] The voltage source provides voltage to the voltage detection module and the insulation module through the relay board;

[0046] The current control board provides current to the current detection module through the relay board;

[0047] The temperature sensor is connected to the test control board.

[0048] As can be seen from the above description, monitoring devices such as voltage detection module, insulation module, current detection module and temperature sensor are also provided for performing relevant tests on the circuit board to be tested. The connection between each detection module and the circuit board to be tested can be achieved through the ejector base plate.

[0049] Furthermore, the stimulation zone module further includes a printer;

[0050] The printer is connected to the test control board.

[0051] As can be seen from the above description, a printer is also provided to print various test results of the circuit board to be tested.

[0052] Furthermore, the circuit board test area module further includes a fixing plate and a fixing assembly;

[0053] The shape of the fixing plate is adapted to the positioning slot of the test board, and the fixing plate can be detachably assembled to the top notch of the positioning slot of the test board through the fixing assembly.

[0054] As can be seen from the above description, after the circuit board to be tested is placed in the test board positioning slot, the fixing plate is fixed at the notch of the test board positioning slot by the fixing assembly, thereby fixing the circuit board to be tested.

[0055] A circuit board tooling testing method, using the circuit board tooling testing device described above, wherein the test control board establishes a communication connection with the circuit board to be tested, which has been pre-burned with a test program, via the test ejector base plate;

[0056] The test control board sends a query message to the circuit board to be tested;

[0057] The circuit board to be tested calls the test module to perform the test according to the query message and generates a reply message;

[0058] The test control board receives the reply message returned by the circuit board to be tested and obtains the test result.

[0059] From the above description, it can be seen that the beneficial effects of the present invention are: a circuit board tooling testing method of the present invention designs an excitation area module and a circuit board test area module in the detection equipment, burns the test control program in the test control board of the excitation area module, sends a message to the circuit board to be tested, thereby promoting the automated testing of the circuit board, and determines the test results based on the return message of the circuit board to be tested.

[0060] Furthermore, the test control board establishes a communication connection with the circuit board to be tested specifically as follows:

[0061] The test control board acts as a TCP communication server, and the test board acts as a TCP communication client to establish a TCP communication connection.

[0062] As can be seen from the above description, TCP communication is used to send messages between the test control board and the circuit board to be tested.

[0063] Furthermore, the communication between the test control board and the circuit board to be tested adopts JSON format messages;

[0064] The query message includes a frame sequence number and a test item name;

[0065] The reply message includes the frame sequence number, the test item name and the test result.

[0066] As can be seen from the above description, the test control board and the circuit board under test communicate using JSON format messages, and a test is identified by a frame number and a test item name.

[0067] A circuit board tooling testing device and method of the present invention are suitable for automatically testing circuit boards in a circuit board batch production scenario.

[0068] Please refer to Figures 1 to 4 , embodiment 1 of the present invention is:

[0069] A circuit board tooling test device comprises an excitation area module and at least one circuit board test area module;

[0070] The excitation area module includes a test control board with a test control program burned into it.

[0071] In this embodiment, the test control board adopts a CCU board, which is used to control the test process and test result feedback.

[0072] The excitation zone module also includes a switch, a switching power supply, a voltage source, a current control board, a relay board and a wiring harness slot;

[0073] The test control board and the test ejector base plate 3 are detachably connected in communication. Specifically, the test control board is connected in communication with the switch via a network cable; the switch is connected in communication with the circuit board test area module via a network cable, and is specifically detachably connected in communication with the test ejector base plate 3.

[0074] The switching power supply is electrically connected to the voltage source and the wiring harness slot;

[0075] The relay board is electrically connected to the voltage source and the current control board respectively;

[0076] The relay board is connected to the wiring harness slot;

[0077] The wiring harness slot is connected to the test control board;

[0078] Each test interface of the test control board is connected to the corresponding interface of the test ejector base plate 3 through the harness slot.

[0079] The excitation area module also includes a voltage detection module, an insulation module, a current detection module, a temperature sensor and a printer;

[0080] The voltage source provides voltage to the voltage detection module and the insulation module through the relay board;

[0081] The current control board provides current to the current detection module through the relay board;

[0082] The temperature sensor is connected to the test control board;

[0083] The printer is connected to the test control board.

[0084] In this embodiment, a 24V switching power supply is used as the switching power supply to power each circuit board. A DC voltage source provides detection voltage for the voltage detection module and the insulation module. The current control board provides current for the current detection module. The relay board is used to control whether the detection voltage and detection current are connected to the test module. The switch is used for Ethernet communication between the test control board and the circuit board to be tested. The circuit board to be tested and the test control board are connected to the switch via a network cable. The serial printer is connected to the excitation board to print the detailed test results.

[0085] In this embodiment, a three-color light and a start button connected to the test control board are also provided.

[0086] The circuit board test area module includes a test board positioning slot 1 and a test ejector base plate 3 for establishing a connection with the circuit board to be tested. The test ejector base plate 3 is assembled and connected to the test board positioning slot 1.

[0087] The test pin base plate 3 is provided with a test pin for contacting the circuit board to be tested.

[0088] In this embodiment, two circuit board test areas are included: a CCU test area and a PCU test area. In other equivalent embodiments, a test ejector base plate 3 with different ejector pin positions can be developed based on the type of circuit board being tested. By replacing the ejector base plate and the test board positioning slot 1, different types of circuit boards can be adapted.

[0089] Please refer to Figures 1 to 4 , the second embodiment of the present invention is:

[0090] A circuit board tooling test device provides further explanation of the tooling structure of the device.

[0091] In this embodiment, the circuit board test area module further includes a fixing plate 4 and a fixing component;

[0092] The fixing plate 4 is shaped to match the test board positioning slot 1 and is removably assembled to the top notch of the test board positioning slot 1 via the fixing assembly. In this embodiment, the fixing assembly includes a fixing handle and its accessories. During use, the circuit board to be tested is placed into the test board positioning slot 1, and then the fixing handle is lowered to ensure good contact between the test pins and the test board. In other equivalent embodiments, the fixing assembly may also adopt other structures, as long as the fixing assembly can press the fixing plate 4 downward and secure it to the notch of the test board positioning slot 1.

[0093] Please refer to Figure 2The accessories of the fixed handle include a fixed bracket, which includes side panels 8, a connecting plate 9 and an H-shaped bottom piece 10. The two side panels 8 are erected on both sides of the position of the test board positioning slot 1 corresponding to the test pin bottom plate 3. The connecting plate 9 is connected to the upper part of the two side panels 8. The bottom piece 10 is connected to the bottom of the connecting plate 9 through the H-shaped middle cross plate to form a fixed bracket for the fixed handle. The fixed handle is arranged above the test board positioning slot 1, connected to the connecting plate 9, and can move up and down along the connecting plate 9. The bottom of the fixed handle is connected to the fixed plate 4, and the fixed plate 4 is driven to move up and down by the up and down movement of the fixed handle.

[0094] In this embodiment, the connecting plate 9 is provided with screw holes, and the fixed handle can refer to the structure of a door bolt, and the positioning member of the bolt is screwed to the connecting plate 9. In other equivalent embodiments, other structures can also be used to enable the fixed handle to move up and down on the connecting plate 9.

[0095] In this embodiment, the switching power supply, switch, wiring harness slot, relay board, and test control board are all mounted on a fixture bottom surface 5. Side panels 2 are attached to the sides of the fixture bottom surface 5, a front panel 6 is located on the front, and a back panel 7 is located on the back. The fixture bottom surface 5, the side panels 2, the front panel 6, the back panel 7, and the removable test ejector base plate 3 define a storage space. The ejector pins on the test ejector base plate 3 extend downward into the storage space, connecting to the various wires of the test control board. The upper ejector pins then contact the circuit board under test.

[0096] In this embodiment, the three-color light, the start button, the printer and the current control board are installed on the front vertical plate 6. Among them, the three-color light adopts an LED light.

[0097] Please refer to Figures 5 to 7 , the third embodiment of the present invention is:

[0098] A circuit board tooling testing method adopts a circuit board tooling testing device described in the above embodiment 1 or 2, wherein the test control board establishes a communication connection with the circuit board to be tested which is pre-burned with a test program through the test ejector base plate 3.

[0099] In this embodiment, first, connect the 220V power supply, check whether the output of each power supply is normal, adjust the output voltage of the DC voltage source to 150V and turn it on, and adjust the current control board to 50.00 (using a 50mV / 300A ammeter). Figure 5, place the circuit board to be tested with the test program burned into the test board positioning slot 1 (there is a positioning hole in the test board positioning slot 1), insert the tooling cable (network cable, serial fiber optic cable), and fix the circuit board to be tested through the fixing component; power on the circuit board to be tested; if the blue light is on, it means that the test control board and the circuit board to be tested have not established Ethernet communication, if the blue light is off, it means that the Ethernet communication connection is successful, close the start button to enter the automatic tooling test; after the automatic tooling test is completed, the printer prints the test results of each item, if all the tests pass, the green light in the three-color light is on, otherwise the red light is on; the test of the circuit board to be tested is completed, disconnect the start button, and enter the test of the next circuit board to be tested.

[0100] In this embodiment, the test steps are described below. The test contents of the circuit board to be tested include but are not limited to Ethernet communication, RS485 communication, CAN communication, serial fiber communication, temperature sensor sampling, DC voltage sampling, DC current sampling, insulation module voltage sampling, and DODI module.

[0101] The circuit board to be tested and the test control board are connected to the switch via a network cable. The test control board acts as a TCP communication server, and the circuit board to be tested acts as a TCP communication client. The test control board controls the test board test process through network communication to implement RS485 and CAN module connection excitation board test, serial port optical fiber transceiver interconnection loopback test, DO to DI running light test, voltage sampling 0 point correction and 150v acquisition and judgment, current sampling 0 point correction and 300mA acquisition and judgment, temperature detection using 1kΩ fixed resistance acquisition and judgment, insulation voltage 150v acquisition and judgment, etc. Network communication can refer to Figure 6 As shown:

[0102] The test control board sends a query message to the circuit board to be tested;

[0103] The circuit board to be tested calls the test module to perform the test according to the query message and generates a reply message;

[0104] The test control board receives the reply message returned by the circuit board to be tested and obtains the test result;

[0105] The communication between the test control board and the circuit board to be tested adopts JSON format messages;

[0106] The query message includes a frame sequence number and a test item name;

[0107] The reply message includes the frame sequence number, the test item name and the test result.

[0108] In this embodiment, the communication process can refer to Figure 7The test control board sends a query message, and the circuit board under test returns a reply message. This communication process is used by the test control board to notify the circuit board under test to perform module testing. The circuit board under test tests each module and returns the test results. The message uses JSON format, which can be seen in Table 1 below.

[0109] Table 1: Protocol fields

[0110]

[0111] The query message format of the test control board is:

[0112] {"id":[frame number],"Item":[item name]};

[0113] The reply message format of the circuit board under test is:

[0114] {"id":[frame number],"Item":[item name],"Result":[detailed result]}.

[0115] Where "id": [Frame Number] is the frame number of each message frame, incremented from 0 upward by the test control board. The circuit board under test is required to return the received frame number. "Item": [Item Name] is the test item command. The test control board sends each test item command. Upon receiving the command, the circuit board under test initiates the corresponding module test and returns the test item result and detailed test result information after the test is completed. "Result": {[Detailed Result]} is the detailed test result returned by the test board. The content can be filled in according to the actual situation. If no detailed result is available, the content will be blank. Test modules include: I / O module, CC signal and electronic lock, serial port module, CAN module, ADC zero sampling, ADC fixed value verification, SD card file system, flash module, network module, etc.

[0116] In other equivalent embodiments, the circuit board under test can be tested and responded to according to the modules that need to be tested, and the protocol can flexibly add or remove test modules ([project name]). The actual communication message routine is shown in Table 2.

[0117] Table 2. Communication message routine

[0118]

[0119] In summary, the present invention provides a circuit board tooling testing device and method, which designs an excitation area module and a circuit board test area module, and burns a test control program in the test control board of the excitation area module to send messages to the circuit board to be tested, thereby promoting the automated testing of the circuit board. At the same time, a test pin base plate and a test board positioning slot are designed in the circuit board test area. For different circuit boards, it is only necessary to replace different test pin base plates and test board positioning slots to adapt to different circuit board tooling tests, thereby improving the testing efficiency of the circuit board.

[0120] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A circuit board tooling test equipment, characterized in that, It includes a stimulus area module and at least one circuit board test area module; The excitation area module includes a test control board with a test control program burned into it; There are two circuit board test area modules, namely a CCU board test area module and a PCU board test area module; The circuit board test area module includes a test board positioning slot and a test ejector base plate for establishing a connection with the circuit board to be tested, and the test ejector base plate is assembled and connected to the test board positioning slot; The test control board and the test ejector base plate are detachably connected to each other in communication; The circuit board test area module also includes a fixing plate and a fixing assembly; The shape of the fixing plate is adapted to the positioning slot of the test plate, and can be detachably assembled to the top notch of the positioning slot of the test plate through the fixing assembly; The fixing assembly includes a fixing handle and accessories. When in use, the circuit board to be tested is placed into the test board positioning slot, and then the fixing handle is lowered to ensure that the test pins on the test pin base are in good contact with the test board. The accessories for fixing the handle include a fixing bracket, and the fixing bracket includes a side plate, a connecting plate and an H-shaped bottom piece; There are two side panels, and the two side panels are erected on both sides of the position of the test pin bottom plate corresponding to the test plate positioning slot. The connecting plate is connected to the upper part of the two side panels, and the bottom piece is connected to the bottom of the connecting plate through an H-shaped middle horizontal plate to form the fixing bracket; The fixed handle is arranged above the positioning slot of the test board, connected to the connecting plate, and can move up and down along the connecting plate. The bottom of the fixed handle is connected to the fixing plate, and the fixing plate is driven to move up and down by the up and down movement of the fixed handle. The excitation zone module also includes a switch; The test control board is connected to the switch via a network cable; The switch is detachably connected to the test ejector base plate via a network cable; The stimulation zone module also includes a printer; The printer is connected to the test control board.

2. A circuit board tooling test equipment according to claim 1, characterized in that: The excitation zone module also includes a switching power supply, a voltage source, a current control board, a relay board and a wiring harness slot; The switching power supply is electrically connected to the voltage source and the wiring harness slot; The relay board is electrically connected to the voltage source and the current control board respectively; The relay board is connected to the wiring harness slot; Each test interface of the test control board is connected to the corresponding interface of the test ejector base plate through the harness slot.

3. A circuit board tooling test equipment according to claim 2, characterized in that: The excitation area module also includes a voltage detection module, an insulation module, a current detection module and a temperature sensor; The voltage source provides voltage to the voltage detection module and the insulation module through the relay board; The current control board provides current to the current detection module through the relay board; The temperature sensor is connected to the test control board.

4. A circuit board tooling testing method, characterized in that: Using the circuit board tooling test equipment according to any one of claims 1 to 3 above, the test control board establishes a communication connection with the circuit board to be tested that is pre-burned with a test program through the test ejector base plate; The test control board sends a query message to the circuit board to be tested; The circuit board to be tested calls the test module to perform the test according to the query message and generates a reply message; The test control board receives the reply message returned by the circuit board to be tested and obtains the test result.

5. A circuit board tooling testing method according to claim 4, characterized in that: The test control board establishes a communication connection with the circuit board to be tested specifically as follows: The test control board acts as a TCP communication server, and the test board acts as a TCP communication client to establish a TCP communication connection.

6. A circuit board tooling testing method according to claim 4, characterized in that: The communication between the test control board and the circuit board to be tested adopts JSON format messages; The query message includes a frame sequence number and a test item name; The reply message includes the frame sequence number, the test item name and the test result.

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