Circuit board fault diagnosis device

Abstract

The utility model discloses a circuit board fault diagnosis device which comprises a workbench, a supporting assembly, a pressing assembly and a probe fixing block, a detected circuit board is placed on the top of the probe fixing block, a detection control board is arranged at the bottom of the probe fixing block, and the detected circuit board is electrically connected with the detection control board through a connector; the device not only can monitor and analyze key parameters such as voltage and current of the circuit board in real time, but also can ensure the accuracy and reliability of test data through advanced digital isolation and analog-to-digital conversion technologies. Meanwhile, the device integrates a log transmission module and a burning integration module, so that data recording, fault tracing and program code burning are facilitated, and the efficiency and convenience of circuit board fault diagnosis are greatly improved. Besides, due to the rapid positioning and installation design of the probe fixing block and the compatibility of the device to various circuit boards, the maintenance efficiency and the test flexibility are greatly improved, and the test requirements in different scenes are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circuit board detection, particularly to a circuit board fault diagnosis device. BACKGROUND

[0002] With the rapid development of electronic instruments and other related industries, product types are increasingly rich, and functions are increasingly diverse. In order to realize different functions, microcontrollers selected by major equipment manufacturers are different, which makes the troubleshooting of circuit boards face many challenges.

[0003] The existing related detection device has a single function, and most of them can only determine whether the circuit board has a fault by detecting voltage and current, but cannot clearly indicate the specific location of the fault point. The troubleshooting personnel need to spend a lot of time and effort to analyze in depth, which greatly affects the maintenance efficiency. For example, the patent number CN207752112U circuit board detection device, the device includes workbench, support assembly, compression assembly, probe fixed block and circuit board positioning plate; the support assembly is installed on the workbench, the compression assembly is slidably connected with the support assembly, the probe fixed block is installed on the workbench, the probe fixed block is provided with a probe for conducting electricity with the circuit board, one end of the probe is electrically connected with the external detection assembly, the circuit board positioning plate is slidably connected with the probe fixed block, and the side of the circuit board positioning plate close to the compression assembly is provided with a positioning groove for accommodating the circuit board. Although the device can detect the current of the circuit board, it has a single function, the application scene is limited, and it does not have the function of archiving and saving test data. In the face of problems in batch production, it is difficult to carry out effective traceability analysis, and it cannot provide strong support for product quality improvement. UTILITY MODEL CONTENT

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the utility model is to provide a circuit board fault diagnosis device.

[0005] The technical solution solved is: a circuit board fault diagnosis device, comprising a workbench, a support assembly, a compression assembly and a probe fixed block, the probe fixed block is placed on the top of the measured circuit board, the probe fixed block is provided with a detection control panel at the bottom, and the measured circuit board is electrically connected with the detection control panel through a connector;

[0006] The detection control panel comprises:

[0007] A main control module is used for controlling the test operation and data processing of the detection control panel;

[0008] An output signal test module is connected with the main control module, and is used for boosting the test signal output by the main control module to form a test voltage;

[0009] The input signal test module is used for isolating the measurement feedback signal of the circuit board under test and sending the isolated signal to the main control module.

[0010] The voltage collection module is used for monitoring the voltage data of the measurement node of the circuit board under test in real time and sending the voltage data to the main control module for processing.

[0011] The communication module is used for data communication between the main control module and external equipment.

[0012] The display module is connected with the communication module and is used for displaying test data and test results.

[0013] The power conversion module is used for converting external power into the required power supply voltage of the detection control board.

[0014] Preferably, the output signal test module selects a 6N135 type photoelectric coupler, and the control end of the photoelectric coupler is connected to the PWM pin and the PWM_C pin of the main control module.

[0015] Preferably, the input signal test module selects an ADuM120N type digital isolator, and the input ends V1A and V1B of the digital isolator are respectively connected to the input signal ports SignalA and SignalB, and the output ends VOA and VOB of the digital isolator are respectively connected to the SignalA_M pin and the SignalB_M pin of the main control module.

[0016] Preferably, the voltage collection module selects an AD7606 type synchronous sampling analog-to-digital converter.

[0017] Preferably, the communication module includes an RS485 communication unit and an RS232 communication unit, which are used for realizing different communication protocol data exchange between the main control module and external equipment.

[0018] Preferably, the device further includes a log transmission interface connected with the main control module through the RS232 communication unit and used for transmitting log data in the test process to external storage equipment or an upper computer.

[0019] Preferably, the display module adopts an SGUS screen connected with the main control module through the RS485 communication unit.

[0020] Preferably, the device further includes a burning integrated module connected with the circuit board under test through a connecting line and used for burning external program code to the circuit board under test.

[0021] Preferably, the probe fixing block is provided with connecting grooves at both ends, and the connecting grooves match the positioning guide rail on the worktable, so that the probe fixing block can be quickly pushed into the positioning guide rail of the worktable to achieve rapid positioning and installation.

[0022] Through the above technical solutions, the beneficial effects of this utility model are as follows: This application provides a circuit board fault diagnosis device that is comprehensive in function, easy to expand, and highly compatible. This device can not only monitor and analyze key parameters such as voltage and current of the circuit board in real time, but also ensure the accuracy and reliability of test data through advanced digital isolation and analog-to-digital conversion technologies. Simultaneously, the device integrates a log transmission and programming module, facilitating data recording and fault tracing, as well as program code programming, greatly improving the efficiency and convenience of circuit board fault diagnosis. Furthermore, the rapid positioning and installation design of the probe fixing block, and the device's compatibility with various circuit boards, greatly improves maintenance efficiency and testing flexibility, meeting the testing needs in different scenarios. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a circuit board fault diagnosis device according to the present invention.

[0024] Figure 2 This is a schematic diagram of the probe fixing block in this utility model.

[0025] Figure 3 This is a diagram of the control module of the detection control board in this utility model.

[0026] Figure 4 This is a circuit diagram of the output signal testing module in this utility model.

[0027] Figure 5 This is a circuit diagram of the input signal testing module in this utility model.

[0028] Figure 6 This is a circuit diagram of the voltage acquisition module in this utility model.

[0029] Figure 7 This is a circuit diagram of the RS485 communication unit in this utility model.

[0030] Figure 8 This is a circuit diagram of the RS232 communication unit in this utility model.

[0031] Figure 9 This is a circuit diagram of the power conversion module in this utility model.

[0032] In the diagram: 1-Workbench, 2-Support assembly, 3-Clamping assembly, 4-Probe fixing block; 5-Test circuit board; 6-Detection control board; 7-Connector; 8-Display module; 9-Log transmission interface; 10-Burning integrated module; 11-Connection slot. Detailed Implementation

[0033] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figure 1 To be continued Figure 9 The detailed description of the embodiments will make this clear. All structural details mentioned in the following embodiments are based on the accompanying drawings.

[0034] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0035] like Figure 1 and 2 As shown, a circuit board fault diagnosis device includes a workbench 1, a support assembly 2, a clamping assembly 3, and a probe fixing block 4. The circuit board under test 5 is placed on the top of the probe fixing block 4, and a detection control board 6 is provided at the bottom of the probe fixing block 4. The circuit board under test 5 and the detection control board 6 are electrically connected through a connector 7.

[0036] In the above, such as Figure 3 As shown, the detection control board 6 includes:

[0037] The main control module is used to control the testing operations and data processing of the detection control board;

[0038] The output signal test module is connected to the main control module and is used to boost the test signal output by the main control module to form a test voltage.

[0039] The input signal test module is used to isolate the measurement feedback signal of the circuit board under test and send the isolated signal to the main control module.

[0040] The voltage acquisition module is used to monitor the voltage data of the measurement nodes on the circuit board under test in real time and send the voltage data to the main control module for processing.

[0041] The communication module is used for data communication between the main control module and external devices.

[0042] Display module 8, connected to the communication module, is used to display test data and test results;

[0043] The power conversion module is used to convert the external power supply into the power supply voltage required by the detection control board.

[0044] In one specific embodiment, such as Figure 4As shown, the output signal test module uses a 6N135 optocoupler, and the control terminal of the optocoupler is connected to the PWM pin and PWM_C pin of the main control module.

[0045] like Figure 5 As shown, the input signal test module uses an ADuM120N digital isolator. The input terminals V1A and V1B of the digital isolator are connected to the input signal ports SignalA and SignalB, respectively. The output terminals VOA and VOB of the digital isolator are connected to the SignalA_M pin and SignalB_M pin of the main control module, respectively.

[0046] like Figure 6 As shown, the voltage acquisition module uses the AD7606 synchronous sampling analog-to-digital converter to perform analog-to-digital conversion on the voltage data of the measurement nodes through the V1-V8 input ports.

[0047] like Figure 7 and 8 As shown, the communication module includes an RS485 communication unit and an RS232 communication unit, which are used to realize data exchange between the main control module and external devices using different communication protocols.

[0048] like Figure 9 As shown, the power conversion module is used to convert the 24V input power to 5V and 3.3V output, providing a stable power supply for each module.

[0049] In practical use, the circuit board under test (PCB) is placed on top of the probe fixing block, ensuring a tight connection between the PCB and the connector on the probe fixing block, thus achieving electrical connection between the PCB and the detection control board. After the system is powered on, the main control module sends a test signal to the 6N135 optocoupler via the PWM pin and PWM_C pin. The optocoupler boosts the test signal to form a suitable test voltage and applies it to the PCB. Upon receiving the test voltage, the PCB generates a measurement feedback signal. The input terminals V1A and V1B of the ADuM120N digital isolator receive the measurement feedback signal, isolates it, and transmits it to the SignalA_M and SignalB_M pins of the main control module via the output terminals VOA and VOB, respectively. The main control module analyzes and processes these signals. The AD7606 monitors the voltage data of the measurement nodes on the PCB in real time through its V1-V8 input ports, converts the acquired analog voltage signal into a digital signal, and transmits the digital signal to the main control module for processing. The main control module compares the test data with preset standard data to determine if the circuit board under test has a fault. Finally, the main control module transmits the processed test data and results to the display module for display via the communication module. The display module uses an SGUS screen, which is connected to the main control module via an RS485 communication unit.

[0050] In one specific embodiment, such as Figure 1 As shown, the device also includes a log transmission interface 9 and a programming integration module 10. The log transmission interface 9 is connected to the main control module via an RS232 communication unit and is used to transmit log data during the test process to an external storage device or a host computer for data recording and fault tracing.

[0051] The programming integration module 10 is connected to the circuit board under test (PCB) via a connecting cable and is used to program external program code onto the PCB 5. This programming integration module supports programming protocols for various microcontrollers and is compatible with the programming requirements of various microcontrollers, thus eliminating the hassle of repeatedly changing programming devices and improving work efficiency.

[0052] In addition, such as Figure 2 As shown, the probe fixing block 4 has connecting grooves 11 at both ends. The connecting grooves 11 match the positioning guide rail on the worktable, so that the probe fixing block 4 can be quickly pushed into the positioning guide rail of the worktable to achieve rapid positioning and installation.

[0053] In practical use, when it is necessary to test different types or specifications of circuit boards, simply pull the original probe fixing block out of the worktable along the positioning guide rail, replace it with a probe fixing block and detection control board that are compatible with the circuit board to be tested, and the new circuit board to be tested can be fault-diagnosed, thereby achieving compatibility of the device with a variety of circuit boards.

[0054] In summary, this application provides a comprehensive, easily expandable, and highly compatible circuit board fault diagnosis device. This device can not only monitor and analyze key parameters such as voltage and current of the circuit board in real time, but also ensure the accuracy and reliability of test data through advanced digital isolation and analog-to-digital conversion technologies. Simultaneously, the device integrates a log transmission and programming module, facilitating data recording and fault tracing, as well as program code programming, greatly improving the efficiency and convenience of circuit board fault diagnosis. Furthermore, the rapid positioning and installation design of the probe fixing block, and the device's compatibility with various circuit boards, significantly improves repair efficiency and testing flexibility, meeting the testing needs of different scenarios.

[0055] The above description is a further detailed explanation of the present utility model in conjunction with specific embodiments, and it should not be considered that the specific implementation of the present utility model is limited to this. For those skilled in the art to which the present utility model pertains and related fields, any extensions, operation methods, and data substitutions made based on the technical solution concept of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A circuit board failure diagnosis apparatus comprising a worktable, a support assembly, a pressing assembly and a probe fixing block, characterized in that, The probe fixing block top places the measured circuit board, the probe fixing block bottom sets the detection control board, the measured circuit board and the detection control board are electrically connected through the joint; The detection control board includes: The main control module is used for controlling the test operation and data processing of the detection control board; The output signal test module is connected with the main control module, and is used for boosting the test signal output by the main control module to form a test voltage; The input signal test module is used for isolating the measurement feedback signal of the measured circuit board and sending the isolated signal to the main control module; The voltage acquisition module is used for monitoring the voltage data of the measurement node on the measured circuit board in real time, and sending the voltage data to the main control module for processing; The communication module is used for data communication between the main control module and external equipment; The display module is connected with the communication module, and is used for displaying test data and test results; The power conversion module is used for converting external power into the power supply voltage required by the detection control board.

2. The circuit board failure diagnosis apparatus according to claim 1, characterized by The output signal test module selects a 6N135 type photoelectric coupler, and the control end of the photoelectric coupler is connected to the PWM pin and PWM_C pin of the main control module.

3. The circuit board failure diagnosis apparatus according to claim 2, characterized by The input signal test module selects a ADuM120N type digital isolator, the input end V1A and V1B of the digital isolator are respectively connected to the input signal port SignalA and SignalB, and the output end VOA and VOB of the digital isolator are respectively connected to the SignalA_M pin and SignalB_M pin of the main control module.

4. The circuit board failure diagnosis apparatus according to claim 3, characterized by The voltage acquisition module selects an AD7606 type synchronous sampling analog-digital converter.

5. The circuit board failure diagnosis apparatus according to claim 1, characterized by The communication module includes an RS485 communication unit and an RS232 communication unit, which are used for realizing different communication protocol data exchange between the main control module and external equipment.

6. The circuit board failure diagnosis apparatus according to claim 5, wherein The device also includes a log transmission interface connected with the main control module through the RS232 communication unit, which is used for transmitting log data in the test process to external storage equipment or host computer.

7. The circuit board failure diagnosis apparatus according to claim 5, wherein The display module adopts an SGUS screen connected with the main control module through the RS485 communication unit.

8. The circuit board failure diagnosis apparatus according to Claim 1, characterized by The device also includes a burning integrated module connected with the measured circuit board through a connecting line, which is used for burning external program code to the measured circuit board.

9. The circuit board fault diagnosis apparatus according to any one of claims 1 to 8, characterized by The probe fixing block is provided with a connecting groove at both ends, the connecting groove is matched with the positioning guide rail on the workbench, so that the probe fixing block can be quickly pushed into the positioning guide rail of the workbench, realizing quick positioning and installation.

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