Circuit board circuit fault detection method, device and system

Abstract

The invention discloses a circuit board circuit fault detection method, device and system, and the method comprises the steps: obtaining target configuration parameter information which is inputted by a user and is used for configuring a working mode of a DC power supply; in response to a trigger signal selected by a user, issuing target configuration parameter information to the direct-current power supply; a thermal imaging instruction is sent to a thermal imaging system in response to the trigger signal, so that the thermal imaging system controls a thermal imaging device to perform thermal imaging on the to-be-tested circuit board; receiving a detection signal acquired by the ampere-voltage meter; and drawing a detection waveform according to a time sequence based on the signal intensity of the detection signal in a visual mode. The direct-current power supply, the ampere-voltage meter and the thermal imaging system can be subjected to linkage detection, and a convenient and visual fault detection scheme is provided for maintainers.

Description

Technical Field

[0001] The present invention relates to the technical field of maintenance instruments and meters for digital products, and particularly relates to a method, device, and system for detecting circuit faults on a circuit board. Background Art

[0002] When repairing digital products (such as terminal products with circuit boards like mobile phones, tablets, computers, etc.), maintenance instruments and meters such as a maintenance power supply, an ammeter and voltmeter are required for maintenance. For example, the digital product is powered on and tested using the maintenance power supply, and the fault condition of the circuit board is judged based on the current and / or voltage measured by the ammeter. In some scenarios, a thermal imaging device (such as a thermal imager) is also needed to detect the abnormally hot areas on a printed circuit board (such as a computer motherboard, a mobile phone motherboard, etc.), and the components with abnormal temperature are found by referring to the schematic diagram of the printed circuit board.

[0003] Currently, these maintenance instruments and meters come from different manufacturers, and the data is not interoperable, that is, the detection results are independent of each other, which is not conducive to maintenance personnel to organically judge the cause of the circuit board fault. To achieve comparative analysis, in the prior art, an oscilloscope is usually used to synchronously display the signals collected by different sensors. However, on the one hand, the cost of a professional oscilloscope is relatively high, and the oscilloscope is relatively bulky. Especially when there are a large number of maintenance instruments and meters, it is not convenient for users to carry; on the other hand, the oscilloscope can usually only display passively and cannot send control instructions to the lower computer.

[0004] Therefore, how to provide a convenient and intuitive fault detection solution for maintenance personnel has become an urgent technical problem to be solved. Summary of the Invention

[0005] Based on the above situation, the main purpose of the present invention is to provide a method, device, and system for detecting circuit faults on a circuit board, so as to provide a convenient and intuitive fault detection solution for maintenance personnel.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] In the first aspect, an embodiment of the present invention discloses a method for detecting circuit faults on a circuit board, which is applied to a control system. The control system is respectively connected to a DC power supply and an ammeter and voltmeter through a standard protocol interface, and the control system exchanges data with a thermal imaging control system. The method includes:

[0008] Step S100, obtaining target configuration parameter information input by the user for configuring the working mode of the DC power supply;

[0009] Step S200: In response to the trigger signal selected by the user, send the target configuration parameter information to the DC power supply, so that the DC power supply operates in the working mode corresponding to the target configuration parameter information, where the DC power supply is used to provide the working DC power to the circuit board under test;

[0010] Step S300: In response to the trigger signal, send a thermal imaging instruction to the thermal imaging system, so that the thermal imaging system controls the thermal imaging device to perform thermal imaging on the circuit board under test;

[0011] Step S400: Receive the detection signal collected by the current-voltage meter;

[0012] Step S500: Based on the signal intensity of the detection signal, draw a detection waveform in a visual manner according to the time series, where the detection signal is the current signal and / or voltage signal collected after the circuit board under test receives the DC power.

[0013] Optionally, the working mode of the DC power supply includes an intermittent power supply mode;

[0014] In step S200, the target configuration parameter includes a frequency parameter, which is used to characterize the on-off frequency of the DC power supply;

[0015] The trigger signal includes an intermittent power supply control signal. In step S200, in response to the intermittent power supply control signal, send an intermittent power supply instruction to the DC power supply, so that the DC power supply operates in an intermittent power supply mode in which it switches back and forth between power on and power off at the on-off frequency, so that the thermal imaging device performs thermal imaging at the on-off frequency.

[0016] Optionally, before step S100, it further includes:

[0017] Present selectable power supply modes to the user, and the power supply modes include a constant current mode, a constant voltage mode, and an overcurrent protection mode;

[0018] In step S200, use the power supply mode selected by the user click as the target power supply mode in the target configuration parameter;

[0019] Step S200 includes: Configure the DC power supply according to the target power supply mode, so that the DC power supply outputs DC power to the circuit board under test according to the target power supply mode.

[0020] Optionally, before step S100, it further includes:

[0021] Present several selectable output voltage amplitudes to the user;

[0022] In step S200, use the voltage amplitude selected by the user click as the target voltage amplitude in the target configuration parameter;

[0023] Step S200 includes: configuring a DC power supply according to the target voltage amplitude, so that the DC power supply provides a DC power matching the target voltage amplitude to the circuit board under test.

[0024] Optionally, it further includes:

[0025] Presenting the switch button of the DC power supply to the user;

[0026] In response to the start trigger signal selected by the user, sending the target configuration parameter information to the DC power supply, so that the DC power supply operates in the working mode corresponding to the target configuration parameter information;

[0027] In response to the shutdown signal selected by the user, sending a shutdown control instruction to the DC power supply to turn off the DC power supply.

[0028] Optionally, before step S400, it further includes: obtaining the trigger threshold of the detection waveform selected by the user;

[0029] Between step S400 and step S500, it further includes:

[0030] Judging whether the detection signal exceeds the trigger threshold;

[0031] When the detection signal exceeds the trigger threshold, execute step S500.

[0032] In a second aspect, an embodiment of the present invention discloses a circuit board circuit fault detection device, which is applied to a control system. The control system is respectively connected to a DC power supply and a current-voltage meter through a standard protocol interface, and the control system performs data interaction with a thermal imaging control system. The device includes:

[0033] A parameter acquisition module, configured to acquire target configuration parameter information input by the user for configuring the working mode of the DC power supply;

[0034] A parameter sending module, configured to send the target configuration parameter information to the DC power supply in response to the trigger signal selected by the user, so that the DC power supply operates in the working mode corresponding to the target configuration parameter information, wherein the DC power supply is used to provide a working DC power to the circuit board under test;

[0035] A thermal imaging instruction sending module, configured to send a thermal imaging instruction to the thermal imaging system in response to the trigger signal, so that the thermal imaging system controls the thermal imaging device to perform thermal imaging on the circuit board under test;

[0036] A detection signal receiving module, configured to receive the detection signal collected by the current-voltage meter;

[0037] A detection waveform plotting module, which is used to plot a detection waveform in a visual manner based on the signal intensity of a detection signal according to a time series. The detection signal is a current signal and / or a voltage signal collected after a circuit board under test receives a DC power supply.

[0038] Optionally, the operating mode of the DC power supply includes an intermittent power supply mode;

[0039] In the parameter distribution module, the target configuration parameters include a frequency parameter, which is used to characterize the on-off frequency of the DC power supply.

[0040] The trigger signal includes an intermittent power supply control signal. In the parameter distribution module, in response to the intermittent power supply control signal, an intermittent power supply instruction is sent to the DC power supply, so that the DC power supply operates in an intermittent power supply mode in which it switches back and forth between power on and power off at the on-off frequency, so that the thermal imaging device performs thermal imaging according to the on-off frequency.

[0041] Optionally, it further includes:

[0042] Presenting selectable power supply modes to the user, where the power supply modes include a constant current mode, a constant voltage mode, and an overcurrent protection mode;

[0043] In the parameter distribution module, the power supply mode selected by the user click is used as the target power supply mode in the target configuration parameters;

[0044] The parameter distribution module is specifically used for: configuring the DC power supply according to the target power supply mode, so that the DC power supply outputs a DC power supply to the circuit board under test according to the target power supply mode.

[0045] Optionally, it further includes:

[0046] Presenting several selectable output voltage amplitudes to the user;

[0047] In the parameter distribution module, the voltage amplitude selected by the user click is used as the target voltage amplitude in the target configuration parameters;

[0048] The parameter distribution module is specifically used for: configuring the DC power supply according to the target voltage amplitude, so that the DC power supply provides a DC power supply matching the target voltage amplitude to the circuit board under test.

[0049] Optionally, it further includes:

[0050] A button presentation module, which is used to present a switch button of the DC power supply to the user;

[0051] An on trigger module, which is used to send target configuration parameter information to the DC power supply in response to an on trigger signal selected by the user, so that the DC power supply operates in a working mode corresponding to the target configuration parameter information;

[0052] A shutdown trigger module, configured to respond to a shutdown signal selected by a user and send a shutdown control instruction to a DC power supply to shut down the DC power supply.

[0053] Optionally, it further includes:

[0054] A threshold acquisition module, configured to acquire the trigger threshold of the detection waveform selected by the user;

[0055] A judgment module, configured to judge whether the detection signal exceeds the trigger threshold; when the detection signal exceeds the trigger threshold, execute the detection waveform drawing module.

[0056] In a third aspect, an embodiment of the present invention discloses a computer-readable storage medium, on which a computer program is stored. The computer program stored in the storage medium is used to be executed by a processor to implement the method disclosed in the first aspect above.

[0057] In a fourth aspect, an embodiment of the present invention discloses a computer device, including a processor, and the processor executes a program to implement the method disclosed in the first aspect above.

[0058] In a fifth aspect, an embodiment of the present invention discloses a circuit board circuit fault detection system, including:

[0059] A DC power supply, configured to provide a working DC power supply to the circuit board to be tested;

[0060] An ammeter-voltmeter, configured to collect the electrical signal of the circuit board to be tested to obtain a detection signal;

[0061] A thermal imaging control system, configured to control a thermal imaging device to perform thermal imaging on the circuit board to be tested; and

[0062] The circuit board circuit fault detection device disclosed in the second aspect above.

[0063] Beneficial effects:

[0064] A circuit board circuit fault detection method, device and system disclosed according to an embodiment of the present invention. Compared with the dedicated interface method, in this application, the control system is respectively connected to the DC power supply and the current-voltage meter through standard protocol interfaces, enabling the control system to be compatible with slave devices having standard interfaces (such as USB, COM, etc.). That is, the control system can link slave devices such as the DC power supply and the current-voltage meter for linked detection and control, and the control system exchanges data with the thermal imaging control system, enabling the control system to link with the thermal imaging system for detection and control, so that the DC power supply, the current-voltage meter, and the thermal imaging system can all perform linked detection. In specific implementation, obtain the target configuration parameter information input by the user for configuring the working mode of the DC power supply; in response to the trigger signal selected by the user, send the target configuration parameter information to the DC power supply so that the DC power supply operates in the working mode corresponding to the target configuration parameter information, where the DC power supply is used to provide the working DC power for the circuit board to be tested; send a thermal imaging instruction to the thermal imaging system in response to the trigger signal so that the thermal imaging system controls the thermal imaging device to perform thermal imaging on the circuit board to be tested; receive the detection signal collected by the current-voltage meter and draw a detection waveform based on the signal intensity of the detection signal in a time series in a visual manner, and the detection signal is the current signal and / or voltage signal collected after the circuit board to be tested receives the DC power. It can be seen that it is convenient for the user to directly control the operation of the DC power supply through the control system and configure the working mode of the DC power supply. At the same time, it linkedly controls the thermal imaging device to perform thermal imaging on the circuit board to be tested and draws the detection waveform in a visual manner, realizing that the user can control the DC power supply, the current-voltage meter, and the thermal imaging device only through one operation interface, reducing the user's operation complexity. And during the process of troubleshooting the circuit board circuit fault, it can intuitively present the detected electrical signals and temperature abnormal areas, and enable the user to comprehensively judge the circuit fault of the circuit board based on the electrical signals and temperature abnormal areas. In summary, it provides a convenient and intuitive fault detection solution for maintenance personnel.

[0065] Other beneficial effects of the present invention will be elaborated in the specific implementation manner through the introduction of specific technical features and technical solutions. Those skilled in the art should be able to understand the beneficial technical effects brought by the technical features and technical solutions through these introductions. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] The embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings:

[0067] Figure 1 It is a schematic block diagram of a circuit board circuit fault detection system disclosed in this embodiment;

[0068] Figure 2Schematic diagram of the host computer interface of a control system disclosed in this embodiment;

[0069] Figure 3 Flowchart of a method for detecting circuit faults on a circuit board disclosed in this embodiment;

[0070] Figure 4 Schematic diagram of a thermal imaging example of a circuit board to be tested at a certain moment disclosed in this embodiment;

[0071] Figure 5 Schematic diagram of the structure of a device for detecting circuit faults on a circuit board disclosed in this embodiment. Detailed implementation manners

[0072] The following describes the present invention based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, and components are not described in detail.

[0073] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0074] Unless the context clearly requires otherwise, the words "including", "comprising", and similar words throughout the specification and claims should be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, the meaning of "including but not limited to".

[0075] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0076] In order to provide a convenient and intuitive fault detection solution for maintenance personnel, this embodiment discloses a method for detecting circuit faults on a circuit board. Please refer to Figure 1 , Figure 1 Schematic block diagram of a circuit board circuit fault detection system disclosed in this embodiment. The circuit board circuit fault detection system includes a control system 100 and a thermal imaging control system 200 that perform data interaction. In this embodiment, the control system 100 and the thermal imaging control system 200 perform data interaction, and can realize the linkage detection between the control system 100 and the thermal imaging control system 200. Please refer to Figure 2 , Figure 2Schematic diagram of an example of the host computer interface of a control system disclosed in this embodiment. On this host computer interface, a "thermal imaging synchronization" button can be integrated. When the user selects the "thermal imaging synchronization" button, based on the communication protocol between systems, communication can be established between the control system 100 and the thermal imaging control system 200, thereby realizing data interaction between the two. When the user does not select the "thermal imaging synchronization" button, the data interaction between the control system 100 and the thermal imaging control system 200 is disconnected.

[0077] Please refer to Figure 1 , in this embodiment, the control system 100 is respectively connected to the DC power supply and the current and voltage meter through standard protocol interfaces. In this embodiment, the so-called standard protocol interfaces can be COM ports, or mainstream standard protocol interfaces such as USB ports, as Figure 2 shown, in the standard protocol interface area, each mainstream interface can be set in this area for the user to select the interface to access, such as the "COM3" interface. In the specific implementation process, the interface can be selected by means of a drop-down box, or a tiled method can be adopted for the user to click and select. Compared with the method of using a dedicated interface for an oscilloscope, for example, in this embodiment, configuring standard protocol interfaces for the control system 100 can facilitate the control system 100 to access different lower-level devices, and in addition to being able to receive data collected by the lower-level devices, it can also issue corresponding control instructions to the lower-level devices.

[0078] A circuit board circuit fault detection method disclosed in this embodiment is applied to the control system 100. Please refer to Figure 3 , Figure 3 is a flowchart of a circuit board circuit fault detection method disclosed in this embodiment. The circuit board circuit fault detection method includes: step S100, step S200, step S300, step S400, and step S500, where:

[0079] Step S100, obtaining target configuration parameter information input by the user for configuring the working mode of the DC power supply. Please refer to Figure 2 , the user can input the target configuration parameters for configuring the working mode of the DC power supply in the mode configuration area, Figure 2The exemplary mode configuration area includes, for example, "Mode" (DC power supply mode), "Preset" (preset output power level), "Frequency", etc. In a specific embodiment, the user can input the target configuration parameter information by clicking and selecting. After the user clicks and selects the target configuration parameter, the target configuration parameter information can be obtained. In this embodiment, by clicking and selecting, it is possible to avoid errors in the configuration of the DC power supply caused by the user's random input. Moreover, by clicking and selecting, the corresponding parameters can be directly associated and sent to the DC power supply, reducing the tediousness of manual adjustment by the user. Compared with the manual adjustment method, directly configuring using the control system can improve the accuracy of the DC power supply configuration.

[0080] Step S200: In response to the trigger signal selected by the user, send the target configuration parameter information to the DC power supply so that the DC power supply operates in the working mode corresponding to the target configuration parameter information. In this embodiment, the so-called DC power supply is used to provide the working DC power for the circuit board under test. Specifically, please refer to Figure 2 , a trigger button representing the trigger signal can be presented to the user in the mode configuration area. For example, Figure 2 in the exemplary "Start according to the above settings", after obtaining the target configuration parameter information input by the user, as long as the user clicks, for example, "Start according to the above settings", the trigger signal selected by the user can be obtained. Based on this trigger signal, the target configuration parameter information is sent to the DC power supply, so that the DC power supply operates in the working mode corresponding to the target configuration parameter information.

[0081] Step S300: In response to the trigger signal, send a thermal imaging instruction to the thermal imaging system so that the thermal imaging system controls the thermal imaging device to perform thermal imaging on the circuit board under test. In this embodiment, please refer to Figure 2 , when the user selects the "Thermal imaging synchronization" button, communication is established between the control system 100 and the thermal imaging control system 200 for data interaction. At this time, the control system 100 can directly link with the thermal imaging control system 200 to perform related thermal imaging operations, that is, the user does not need to additionally operate the thermal imaging system 200. Specifically, when the trigger signal selected by the user is obtained, on the one hand, the control system 100 can directly configure its subordinate device (such as a DC power supply), and on the other hand, it can directly trigger the thermal imaging control system 200 to control the thermal imaging device to perform thermal imaging on the circuit board under test. Thus, not only the tediousness of user operation is reduced, but also the linked detection of current sampling and thermal imaging is achieved.

[0082] It should be noted that in this embodiment, the execution order between step S200 and step S300 is not distinguished.

[0083] Step S400: Receive the detection signal collected by the current-voltage meter. Specifically, after the DC power supply provides the working DC power to the circuit board under test, the current-voltage meter can collect the electrical signal of the circuit board under test, and the electrical signal can be a current signal and / or a voltage signal. In this embodiment, the detection signal collected by the current-voltage meter can be received through a standard protocol interface.

[0084] Step S500: Draw a detection waveform based on the signal strength of the detection signal in a time series in a visual manner. In this embodiment, the detection signal is a current signal and / or a voltage signal collected after the circuit board under test receives the DC power. Please refer to Figure 2 , in the specific implementation process, the drawn detection waveform can be displayed in the waveform display area of the control system, where the abscissa can be time and the ordinate can be current or current and voltage.

[0085] To facilitate the user to quickly and intuitively lock the temperature anomaly area, in an optional embodiment, the working mode of the DC power supply includes an intermittent power supply mode; in step S200, the target configuration parameter includes a frequency parameter, which is used to characterize the on-off frequency of the DC power supply; the trigger signal includes an intermittent power supply control signal. In step S200, in response to the intermittent power supply control signal, an intermittent power supply instruction is sent to the DC power supply, so that the DC power supply works in an intermittent power supply mode in which it switches back and forth between power on and power off at the on-off frequency, so that the thermal imaging device performs thermal imaging according to the on-off frequency. Please refer to Figure 2 , in the mode configuration area, a "flashing power supply" button can be configured. When the user triggers the "flashing power supply" button, the DC power supply works in the intermittent power supply mode. In the specific implementation process, in the mode configuration area, the on-off frequency of the DC power supply (such as 0.5 s) can also be set, so that the DC power supply works in an intermittent power supply mode in which it switches back and forth between power on and power off at the on-off frequency. Thus, the thermal imaging device performs thermal imaging according to the on-off frequency. When there is a temperature anomaly at a certain point, in the thermal imaging picture, a flashing red bright spot will appear, so as to facilitate the user to quickly and intuitively lock the temperature anomaly area. Please refer to Figure 4 , Figure 4 This is a schematic diagram of the thermal imaging example of a certain moment of the circuit board under test disclosed in this embodiment. When the temperature anomaly area is small, it is difficult to find the area with abnormal color in the static thermal imaging picture. In this embodiment, by controlling the DC power supply to work in the intermittent power supply mode, the thermal imaging device performs thermal imaging according to the on-off frequency. Thus, when there is an area with abnormal color, a "flashing" effect of alternating bright and dark will appear, so as to facilitate the user to quickly and intuitively lock the temperature anomaly area.

[0086] To reduce the time for the user to adjust the power supply, in an alternative embodiment, various mode parameters can be pre-configured in the control system in a preset manner, so that when the user uses it, the preset parameters can be directly called to configure the DC power supply. In an alternative embodiment, before step S100, it further includes: presenting selectable power supply modes to the user, where the power supply modes include constant current mode, constant voltage mode, and overcurrent protection mode; in step S200, the power supply mode selected by the user is used as the target power supply mode in the target configuration parameters; step S200 includes: configuring the DC power supply according to the target power supply mode, so that the DC power supply outputs DC power to the circuit board under test according to the target power supply mode. Please refer to Figure 2 , the constant current mode, constant voltage mode, and overcurrent protection mode are preset in the configuration area, as Figure 2 shown by "CC", "CV", "OCP" in

[0087] In an alternative embodiment, before step S100, it further includes: presenting several selectable output voltage amplitudes to the user; in step S200, the voltage amplitude selected by the user is used as the target voltage amplitude in the target configuration parameters; step S200 includes: configuring the DC power supply according to the target voltage amplitude, so that the DC power supply provides DC power matching the target voltage amplitude to the circuit board under test. Please refer to Figure 2 , several output voltage amplitudes such as "1.8V", "4.2V", "5.8V", "8.2V", "15V", "24V" are preset in the configuration area. As long as the user clicks to select the corresponding gear, the configuration parameters of that gear can be retrieved. When the user triggers to start the DC power supply, these parameters can be sent to the DC power supply, realizing one-key configuration of the power supply mode of the DC power supply and reducing the time for the user to adjust the power supply. Moreover, during the repair process for different circuit boards under test, it is also convenient for the user to quickly switch to the DC power supply with the output voltage amplitude corresponding to the circuit board under test.

[0088] In an alternative embodiment, it further includes: presenting a switch button of the DC power supply to the user; in response to the start trigger signal selected by the user, sending the target configuration parameter information to the DC power supply, so that the DC power supply operates in the working mode corresponding to the target configuration parameter information; in response to the shutdown signal selected by the user, sending a shutdown control instruction to the DC power supply to turn off the DC power supply. Specifically, please refer to Figure 2, a "Power Off" button and a "Start with the Above Settings" button are preset in the configuration area: when the user selects to trigger the "Power Off" button, the DC power supply can be directly turned off; when the user selects to trigger the "Start with the Above Settings" button, the DC power supply can be started according to the target configuration parameters input by the user and operate in the working mode corresponding to the target configuration parameter information. Thus, it is convenient for the user to control the start and stop of the DC power supply with one key.

[0089] To reduce the interference of the detection waveform caused by the non-steady-state current in the power-on sequence and improve the accuracy of data analysis, in an optional embodiment, before step S400, it further includes: obtaining the trigger threshold of the detection waveform selected by the user; between step S400 and step S500, it further includes: determining whether the detection signal exceeds the trigger threshold; when the detection signal exceeds the trigger threshold, step S500 is executed. Please refer to Figure 2 , an option such as "Auto Trigger" can be set on the control system, and the user can select whether to automatically trigger the drawing of the detection waveform and the trigger threshold for triggering the drawing of the detection waveform (for example, the current is greater than 0.05A). As an example, when the user selects the trigger threshold ">0.05A", during the process of receiving the detection signal, it can be determined whether the detection signal exceeds the trigger threshold. If the detection signal exceeds the trigger threshold, it means that the current power-on is stable, and the detection waveform can be drawn based on the detection signal. It should be noted that in the specific implementation process, when starting to draw the detection waveform based on the detection signal, the trigger threshold judgment is no longer performed during the drawing process, that is, currents less than, for example, 0.05A should also be drawn in the detection waveform.

[0090] This embodiment also discloses a circuit board circuit fault detection device applied to a control system. The control system is respectively connected to the DC power supply and the current voltage meter through a standard protocol interface, and the control system exchanges data with the thermal imaging control system. Please refer to Figure 5 , Figure 5 is a schematic structural diagram of a circuit board circuit fault detection device disclosed in this embodiment. The circuit board circuit fault detection device includes:

[0091] a parameter acquisition module 100, a parameter distribution module 200, a thermal imaging instruction sending module 300, a detection signal receiving module 400, and a detection waveform drawing module 500, where:

[0092] The parameter acquisition module 100 is used to acquire the target configuration parameter information input by the user for configuring the working mode of the DC power supply.

[0093] The parameter distribution module 200 is configured to respond to a trigger signal selected by a user and distribute target configuration parameter information to a DC power supply, so that the DC power supply operates in a working mode corresponding to the target configuration parameter information, where the DC power supply is used to provide a working DC power supply to a circuit board under test;

[0094] The thermal imaging instruction sending module 300 is configured to respond to a trigger signal and send a thermal imaging instruction to a thermal imaging system, so that the thermal imaging system controls a thermal imaging device to perform thermal imaging on a circuit board under test;

[0095] The detection signal receiving module 400 is configured to receive a detection signal collected by a current-voltage meter;

[0096] The detection waveform plotting module 500 is configured to plot a detection waveform in a visual manner based on the signal strength of the detection signal according to a time series, where the detection signal is a current signal and / or a voltage signal collected after the circuit board under test receives the DC power supply.

[0097] In an alternative embodiment, the working mode of the DC power supply includes an intermittent power supply mode;

[0098] In the parameter distribution module 200, the target configuration parameter includes a frequency parameter, which is used to characterize the on-off frequency of the DC power supply;

[0099] The trigger signal includes an intermittent power supply control signal. In the parameter distribution module 200, in response to the intermittent power supply control signal, an intermittent power supply instruction is distributed to the DC power supply, so that the DC power supply operates in an intermittent power supply mode in which it switches back and forth between power on and power off at the on-off frequency, so that the thermal imaging device performs thermal imaging at the on-off frequency.

[0100] In an alternative embodiment, it further includes:

[0101] Presenting selectable power supply modes to the user, where the power supply modes include a constant current mode, a constant voltage mode, and an overcurrent protection mode;

[0102] In the parameter distribution module 200, the power supply mode selected by the user through a click is used as the target power supply mode in the target configuration parameter;

[0103] The parameter distribution module 200 is specifically configured to: configure the DC power supply according to the target power supply mode, so that the DC power supply outputs a DC power supply to the circuit board under test according to the target power supply mode.

[0104] In an alternative embodiment, it further includes:

[0105] Presenting selectable several levels of output voltage amplitudes to the user;

[0106] In the parameter distribution module 200, the voltage amplitude selected by the user through a click is used as the target voltage amplitude in the target configuration parameter;

[0107] The parameter distribution module 200 is specifically configured to: configure the DC power supply according to the target voltage amplitude, so that the DC power supply provides a DC power supply matching the target voltage amplitude to the circuit board to be measured.

[0108] In an alternative embodiment, it further includes:

[0109] A button presentation module, configured to present a switch button of the DC power supply to the user;

[0110] An on-trigger module, configured to issue target configuration parameter information to the DC power supply in response to an on-trigger signal selected by the user, so that the DC power supply operates in a working mode corresponding to the target configuration parameter information;

[0111] An off-trigger module, configured to issue an off control instruction to the DC power supply in response to an off signal selected by the user to turn off the DC power supply.

[0112] In an alternative embodiment, it further includes:

[0113] A threshold acquisition module, configured to acquire a trigger threshold of a detection waveform selected by the user;

[0114] A judgment module, configured to judge whether the detection signal exceeds the trigger threshold; when the detection signal exceeds the trigger threshold, execute the detection waveform drawing module 500.

[0115] This embodiment also discloses a computer device, including a processor, and the processor executes a program to implement the method disclosed in the above embodiment.

[0116] This embodiment also discloses a circuit board circuit fault detection system, including: a DC power supply, a current and voltage meter, a thermal imaging control system, and the circuit board circuit fault detection device disclosed in the above embodiment, where:

[0117] The DC power supply is configured to provide a working DC power supply to the circuit board to be measured;

[0118] The current and voltage meter is configured to collect an electrical signal of the circuit board to be measured to obtain a detection signal;

[0119] The thermal imaging control system is configured to control a thermal imaging device to perform thermal imaging on the circuit board to be measured.

[0120] A circuit board circuit fault detection method, device, and system disclosed according to an embodiment of the present invention. Compared with the dedicated interface method, in this application, the control system is respectively connected to a DC power supply and a current-voltage meter through a standard protocol interface, enabling the control system to be compatible with slave devices having standard interfaces (such as USB, COM, etc.). That is, the control system can link slave devices such as a DC power supply and a current-voltage meter for linked detection and control. The control system exchanges data with a thermal imaging control system, enabling the control system to be linked with the thermal imaging system for detection and control, so that the DC power supply, the current-voltage meter, and the thermal imaging system can all perform linked detection. In specific implementation, target configuration parameter information for configuring the working mode of the DC power supply is obtained; in response to a trigger signal selected by the user, the target configuration parameter information is sent to the DC power supply to make the DC power supply operate in a working mode corresponding to the target configuration parameter information, where the DC power supply is used to provide a working DC power supply to the circuit board to be tested; a thermal imaging instruction is sent to the thermal imaging system in response to the trigger signal to make the thermal imaging system control the thermal imaging device to perform thermal imaging on the circuit board to be tested; the detection signal collected by the current-voltage meter is received, and a detection waveform is drawn based on the signal intensity of the detection signal in a time series in a visual manner. The detection signal is a current signal and / or a voltage signal collected after the circuit board to be tested receives the DC power supply. It can be seen that it is convenient for the user to directly control the operation of the DC power supply through the control system and configure the working mode of the DC power supply. At the same time, the thermal imaging device is linked to perform thermal imaging on the circuit board to be tested, and the detection waveform is drawn in a visual manner, realizing that the user can control the DC power supply, the current-voltage meter, and the thermal imaging device through only one operation interface, reducing the user's operation complexity. Moreover, during the process of repairing the circuit board circuit fault, the detected electrical signal and the temperature abnormal area can be intuitively presented, and the user can comprehensively judge the circuit fault of the circuit board based on the electrical signal and the temperature abnormal area. In summary, a convenient and intuitive fault detection solution is provided for maintenance personnel.

[0121] In addition, the present invention also provides a computer-readable storage medium, such as a chip, an optical disc, etc. An execution program is stored on the computer-readable storage medium, and when the execution program is executed, the method described in any one of the above is implemented.

[0122] It should be noted that the computer-readable storage medium described in the embodiments of the present disclosure is not limited to the above-described embodiments. For example, it may also be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the embodiments of the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program, and the program may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0123] Those skilled in the art can understand that, on the premise of no conflict, the above preferred solutions can be freely combined and superimposed. Among them, the flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order from that marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions. The numbers assigned to the steps in this article are only for convenience of description and reference, and are not used to limit the order before and after. The specific execution order is determined by the technology itself, and those skilled in the art can determine various permitted and reasonable orders according to the technology itself.

[0124] It should be noted that in the present invention, step numbers (letter or number numbers) are used to refer to certain specific method steps only for the purpose of convenience and brevity of description, and by no means to limit the order of these method steps by letters or numbers. Those skilled in the art can understand that the order of the relevant method steps should be determined by the technology itself and should not be unduly restricted by the existence of step numbers. Those skilled in the art can determine various permitted and reasonable step orders according to the technology itself.

[0125] Those skilled in the art can understand that, on the premise of no conflict, the above preferred solutions can be freely combined and superimposed.

[0126] It should be understood that the above embodiments are merely exemplary and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that those skilled in the art can make to the above details will be included within the scope of the claims of the present invention.

Claims

1. A circuit board circuit fault detection method, applied to a control system, characterized in that, The control system is respectively connected to a DC power supply and a current-voltage meter through a standard protocol interface, and the control system exchanges data with a thermal imaging control system. The method includes: Step S100: Obtain target configuration parameter information input by the user for configuring the working mode of the DC power supply. Step S200: In response to a trigger signal selected by the user, send the target configuration parameter information to the DC power supply, so that the DC power supply operates in a working mode corresponding to the target configuration parameter information. The DC power supply is used to provide a working DC power supply to the circuit board to be tested. Step S300: In response to the trigger signal, send a thermal imaging instruction to the thermal imaging system, so that the thermal imaging system controls the thermal imaging device to perform thermal imaging on the circuit board to be tested. Step S400: Receive the detection signal collected by the current-voltage meter. Step S500: Draw a detection waveform based on the signal intensity of the detection signal in a time series in a visual manner. The detection signal is a current signal and / or a voltage signal collected after the circuit board to be tested receives the DC power supply.

2. The circuit board circuit fault detection method according to claim 1, characterized in that, The working mode of the DC power supply includes an intermittent power supply mode. In step S200, the target configuration parameter includes a frequency parameter, which is used to characterize the on-off frequency of the DC power supply. The trigger signal includes an intermittent power supply control signal. In step S200, in response to the intermittent power supply control signal, send an intermittent power supply instruction to the DC power supply, so that the DC power supply operates in an intermittent power supply mode in which it switches back and forth between power on and power off at the on-off frequency, so that the thermal imaging device performs thermal imaging at the on-off frequency.

3. The circuit board circuit fault detection method according to claim 2, wherein, Before step S100, it further includes: Presenting selectable power supply modes to the user, where the power supply modes include a constant current mode, a constant voltage mode, and an overcurrent protection mode. In step S200, use the power supply mode selected by the user click as the target power supply mode in the target configuration parameter. Step S200 includes: Configuring the DC power supply according to the target power supply mode, so that the DC power supply outputs the DC power to the circuit board to be tested according to the target power supply mode.

4. The circuit board circuit fault detection method according to claim 2, characterized in that, Before step S100, it further includes: Presenting several selectable output voltage amplitudes to the user. In step S200, use the voltage amplitude selected by the user click as the target voltage amplitude in the target configuration parameter. Step S200 includes: Configuring the DC power supply according to the target voltage amplitude, so that the DC power supply provides a DC power supply matching the target voltage amplitude to the circuit board to be tested.

5. The circuit board circuit fault detection method according to claim 2, characterized in that, It further includes: Presenting a switch button of the DC power supply to the user. In response to an on trigger signal selected by the user, send the target configuration parameter information to the DC power supply, so that the DC power supply operates in a working mode corresponding to the target configuration parameter information. In response to a shutdown signal selected by the user, send a shutdown control instruction to the DC power supply to shut down the DC power supply.

6. The circuit board circuit fault detection method according to any one of claims 1-5, characterized in that Before the step S400, it further includes: obtaining the trigger threshold of the detection waveform selected by the user; Between the step S400 and the step S500, it further includes: Judging whether the detection signal exceeds the trigger threshold; When the detection signal exceeds the trigger threshold, execute the step S500.

7. A circuit board circuit fault detection device, applied to a control system, is characterized in that, The control system is respectively connected to the DC power supply and the current-voltage meter through a standard protocol interface, and the control system exchanges data with the thermal imaging control system. The device includes: A parameter acquisition module (100) for acquiring the target configuration parameter information input by the user for configuring the working mode of the DC power supply; A parameter distribution module (200) for distributing the target configuration parameter information to the DC power supply in response to the trigger signal selected by the user, so that the DC power supply operates in the working mode corresponding to the target configuration parameter information, wherein the DC power supply is used to provide the working DC power for the circuit board to be tested; A thermal imaging instruction sending module (300) for sending a thermal imaging instruction to the thermal imaging system in response to the trigger signal, so that the thermal imaging system controls the thermal imaging device to perform thermal imaging on the circuit board to be tested; A detection signal receiving module (400) for receiving the detection signal collected by the current-voltage meter; A detection waveform drawing module (500) for visually drawing a detection waveform based on the signal intensity of the detection signal in time series, where the detection signal is the current signal and / or voltage signal collected after the circuit board to be tested receives the DC power; 8. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer program stored in the storage medium is used to be executed by the processor to implement the method according to any one of claims 1-6.

9. A circuit board circuit fault detection system, characterized in that, It includes: A DC power supply for providing the working DC power for the circuit board to be tested; A current-voltage meter for collecting the electrical signal of the circuit board to be tested to obtain a detection signal; A thermal imaging control system for controlling the thermal imaging device to perform thermal imaging on the circuit board to be tested; And The circuit board circuit fault detection device according to claim 7.

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