TWI705258B - A circuit troubleshooting system - Google Patents

Abstract

A circuit troubleshooting system, including a graphical user interface program, a nodal electrical characteristic table, an artificial intelligence logic, a computer platform, a power and signal generator, a set of measuring equipment, and an editable maintenance note. The nodal electrical characteristic table records the electrical characteristics of each node on the target circuit under test, such as but not limited to the voltage, current, frequency...etc. The nodal electrical characteristic table also shows the meanings of common error signals, the correlation between nodes, and user guides to troubleshooting. The computer platform executes the graphical user interface program, which provides a graphical user interface for operation, manages system access permissions for different maintainers, and records the testing results logged by the maintainer. The graphical user interface program can operate on three modes to test a target circuit: a default general testing mode that tests multiple circuit functions, a specific testing mode that examines any one specific circuit function, and a manual component-testing mode that examines circuit components. The graphical user interface program guides the maintainer to feed necessary power and signal from the power and signal generator into the target circuit. The graphical user interface program then records the input and output signals of the target circuit with the measuring equipment. The artificial intelligence logic then uses the data to determine if the target circuit is operating correctly. If the target circuit is found to be operating incorrectly, the graphical user interface program first commands the power and signal generator to feed necessary power and signal into the target circuit, then guides the maintainer to measure the electrical characteristics of specific nodes with the measuring equipment. The graphical user interface program then diagnoses possible malfunctioning components using the artificial intelligence logic, according to the measured electrical characteristics data. The artificial intelligence logic analyzes the electrical characteristics data as it is collected, so that the possibilities of malfunctioning components can be narrowed down with each measurement. This enables the maintainer to locate and remove the malfunctioning component efficiently. This system additionally displays the circuit diagram, schematic diagram, and actual photos of the target circuit, and also briefly explains the circuit diagram of the target circuit with simple icons, making it easier for the maintainer to locate each node they intend to measure. The graphical user interface program saves the nodal electrical characteristic data table, and provides the maintainer with electrical characteristics data of correctly functioning nodes for comparison. The graphical user interface program also presents the maintainer with a menu of malfunction suggestions and corresponding troubleshooting steps, using simple icons that the maintainer can select and directly initiate a troubleshooting process. The graphical user interface program also allows the maintainer to create and edit maintenance notes for each node, to keep track of maintenance history.

Description

Circuit Maintenance System

This creation is a circuit maintenance system, used to automatically determine whether the circuit is operating normally, and to improve the speed of circuit troubleshooting. This creation has a computer platform that can run a graphical operation interface to guide the maintenance personnel to use appropriate power and signal feed Enter the circuit board to be tested and measure the input and output signals of the circuit board to be tested, and then automatically determine whether the circuit is operating normally. At the same time, the system can display the circuit diagram or schematic diagram of the circuit board to be tested, and physical photos, and the comparison relationship , It is convenient for the maintenance personnel to measure the electrical characteristics of the circuit nodes with the measuring equipment. When the circuit is abnormal, the maintenance personnel will be guided to gradually measure the circuit nodes to reduce the range of possible faulty components. The maintenance personnel can click on the icon to establish and Compile maintenance notes for each circuit node and accumulate maintenance experience.

Traditional circuit board maintenance work must use various electronic instruments, such as power supplies, function wave generators, etc. to feed the correct power and signal sources to the circuit board to be tested. The maintenance personnel then decide to measure the circuit diagram based on the circuit principle. Then, find the position of the circuit node to be measured on the actual circuit board under test, measure the electrical characteristics, and then determine whether the signal of the circuit node is correct according to the measured signal against the circuit principle. If the signal of the circuit node is not correct, the maintenance personnel must determine the cause of the fault signal based on the circuit principle, and continue its measurement, comparison and inference Work and can gradually narrow down the range of possible faulty components, and finally find out the truly faulty components or lines to complete the maintenance work. Therefore, the traditional circuit board maintenance personnel must have sufficient knowledge of circuit principles to determine which signal source to feed during the maintenance work, and determine the next maintenance step based on the electrical characteristics of the measured circuit nodes, repeated deliberation and measurement Only then can the components or circuits that are truly faulty be judged. Therefore, the maintenance personnel must repeatedly check the actual positions of the circuit nodes to be measured in the circuit diagram on the circuit board to be tested. This repeated comparison will slow down the maintenance work.

Since the same batch of circuit boards to be tested have similar or the same circuit diagrams and component materials, and the environment used is usually similar or the same, the faulty components or circuits are often the same or similar, but only in the traditional maintenance process Relying on maintenance personnel to record by themselves, maintenance experience is difficult to accumulate or pass on.

In addition, during the maintenance process, the maintenance personnel must repeatedly cross-check the circuit diagram and the circuit board to find out the actual position of the circuit node to be measured on the circuit board under test, which is time-consuming and laborious.

Another conventional automatic circuit board maintenance system is to design a dedicated elastic probe matrix for the circuit board to be tested. The position of the probe is the circuit node to be measured, and then the circuit board to be tested is pressed on the elastic probe. On the needle, the probe and the circuit node are connected to each other. The probe is connected with the necessary power supply, signal source and measurement circuit or instrument, and is fed into the probe and measured by the program control on the computer or microprocessor system The electrical signals of the probes. These electrical signals can be determined by pre-written rules to determine whether the electronic components and circuits are normal. However, this method is usually only suitable for quality control during the production of circuit boards, because the circuit boards that are reworked from the factory are usually coated with waterproof Adhesive film, it is difficult for the elastic probe to penetrate the insulation The glue film touches the circuit nodes, so this kind of circuit board automatic maintenance system will be difficult to apply. In contrast, a hand-held test stick can be used with a pointed puncture needle to manually puncture the film to measure the circuit nodes.

The structure of this creation is shown in Figure 1, including: a graphical interface program, a node electrical characteristic data sheet, an artificial intelligence logic, a computer platform, a test power supply and signal source, a measurement equipment and a maintenance note. Among them, the node electrical characteristics data table records the correct electrical characteristics of the circuit node, such as voltage, current, waveform, frequency, etc., and records the meaning of the common abnormal signals of the circuit node, the correlation between different circuit nodes, and the fault Excluded guidelines and other information, the computer platform can be used to execute the graphical interface program to provide a graphical operation interface for maintenance personnel, manage the measurement permissions that maintenance personnel can operate, and record the items measured by maintenance personnel. The graphical interface program There are three modes of overall function test, single function test and component maintenance test, which can guide maintenance personnel to feed the power and test signals generated by the test power supply and signal source to the circuit board to be tested, and use the measurement equipment to measure the input of the circuit Output signal, and then judge whether the circuit is normal according to the artificial intelligence logic. When the circuit is abnormal, the graphical interface program will direct the test power supply and signal source to generate the necessary power and test signals into the circuit board to be tested and guide the maintenance personnel to use the quantity The test equipment measures certain specific circuit nodes step by step. The program will use the artificial intelligence logic to determine possible fault points based on the measured electrical signals, and gradually narrow the range of possible faulty components to help users correctly determine the faulty components of the circuit Or line.

This system can display the circuit diagram or schematic diagram of the circuit board to be tested, and the physical phase The comparison relationship is shown with icons to facilitate the maintenance personnel to find the position of the circuit node to be measured on the circuit board to be tested. The graphical interface program can access the electrical characteristics data table of the node and display the correct electrical characteristics of the circuit node It can be compared by maintenance personnel, and can display the meaning of common abnormal signals and troubleshooting guidelines of each circuit node in the way of icon click, to help maintenance personnel quickly eliminate circuit faults, and maintenance personnel can click on the icon to establish and edit each circuit node Overhaul notes, accumulate overhaul experience.

11: Graphical interface program

12: Node electrical characteristics data sheet

13: artificial intelligence logic

14: Computer platform

15: Test power supply and signal source

16: Measuring equipment

17: Maintenance notes

18: circuit board to be tested

21: Boot test screen

22: Boot test screen

23: Step by step guide measurement circuit nodes

24: Fault judgment icon

25: Frame icon

26: Frame icon

31: circuit diagram frame

32: photo frame

33: Frame icon

34: Frame icon

41: circuit diagram frame

42: Correct electrical characteristics chart

43: Edit frame

44: Frame icon

Figure 1 is a diagram of the system architecture created, and Figure 2 is an embodiment of gradually reducing possible failure points.

Figure 3 is an example of the graphical interface program displaying the circuit diagram or schematic diagram of the circuit board to be tested, and a physical photo

Figure 4 is an embodiment of the graphical interface program showing the correct electrical and editing maintenance notes that the circuit node should have under normal operation

The system architecture diagram of this creation is shown in Figure 1, including: a graphical interface program 11, a node electrical characteristic data table 12, an artificial intelligence logic 13, a computer platform 14, a test power supply and signal source 15, a quantity Test equipment 16 and a maintenance note 17, where the node electrical characteristics data table 12 records the correct electrical characteristics of the circuit node, such as voltage, current, waveform, frequency, etc., and records the meaning of the common abnormal signals of the circuit node, Information about the correlation between different circuit nodes, troubleshooting guidelines, etc., The computer platform 14 can be used to execute the graphical interface program 11, and its composition can be Regarding a conventional computer host or a dedicated embedded system, the computer platform 14 has conventional graphical display devices such as a screen, a touch screen, a keyboard, a mouse, and other user operation interfaces.

The node electrical characteristic data table 12 is the information recorded on the computer platform 14. Its recording form can be in the form of a conventional database system, text table, code table array, etc. The record content includes: the correct electrical of each circuit node Features (such as voltage, current, waveform, frequency, etc.), the meaning of common abnormal signals of each circuit node, the correlation between different circuit nodes, troubleshooting guidelines and other information, make this graphical interface program 11 to facilitate access to its data.

The test power supply and signal source 15 can provide the voltage and current sources required to repair the circuit board, and at the same time provide the signal source required to repair the circuit board. The method of generating these power and signal sources can be provided by the instrument manufacturer. The power supply device or signal source device can also be an electronic circuit device specially designed for a specific circuit board to be tested. The test power supply and signal source 15 are electrically connected to the computer platform 14 and can be controlled by the graphical interface program 11. Set the output signal form and output timing. The test power supply and signal source 15 are designed with input and output interfaces suitable for the circuit board 18 to be tested, which can be physically connected to the circuit board 18 to be tested, so as to be able to follow the graphical interface program The test procedure of 11 feeds the required power and signal sources into the circuit board 18 to be tested for maintenance.

The measuring device 16 can measure the electrical characteristics of the circuit board 18 to be tested, such as voltage, current, waveform, frequency, etc., and its measurement location includes the complete input and output signals of the circuit board 18 to be tested and individual circuits. For nodes, etc., the measuring equipment 16 can be a commercially available measuring instrument or an electronic circuit specially designed for a specific circuit board to be tested. The device 16 is electrically connected to the computer platform 14 and can be controlled by the graphical interface program 11. Therefore, the measurement result can be read by the graphical interface program 11. The measurement device 16 is designed for the circuit board 18 to be tested The input and output interfaces can be physically connected to the circuit board under test 18, so that the electrical signals of the circuit board under test 18 can be read in accordance with the operation process and stages of the graphical interface program 11. At the same time, the measurement device 16 is designed with a handheld The form of the probe or test rod can be a conventional single test rod, or various circuit fixtures, which is convenient for maintenance personnel to measure the electrical signals of the circuit nodes on the circuit board 18 to be tested. At the same time, these probes or The test rod can be designed with a sharp probe so that the maintenance personnel can force the insulation coating or even the plastic on the circuit board 18 to be tested to pierce the electrical signal.

The artificial intelligence logic 13 is information recorded on the computer platform 14. Its recording form can be in the form of a conventional database system, a text table, a table array of program codes, etc., and its recording content includes the operation of the circuit board under test 18 Provided power and signal source, circuit board test steps and processes, and the corresponding input and output relationship of the circuit board 18 under test under normal conditions. The graphical interface program 11 can access the artificial intelligence logic 13 to access the circuit under test The board 18 performs a series of automatic test procedures. The graphical interface program 11 can be suspended in a specific test step of a series of test procedures according to the record of the artificial intelligence logic 13, or manually decide to proceed to the next test step, or Return to the previous test step. This function is particularly useful when the input and output relationship of the circuit board 18 to be tested is sequence dependent or data dependent. The maintenance personnel can set the test program to a specific test step and pause it. In order to observe or eliminate the circuit abnormalities that appear on the circuit board under a specific combination of input conditions or a specific operation sequence. often.

The artificial intelligence logic 13 also records the test steps and processes when the circuit board 18 to be tested is abnormal. The graphical interface program 11 can guide the maintenance personnel to use the measurement device 16 to perform a series of electrical measurements of the circuit nodes. The artificial intelligence logic 13 records the judgment logic for repairing the circuit board under test 18. When the circuit board under test is found to be faulty during the test, the graphical interface program 11 can be based on the node electrical characteristic data table 12 and the artificial intelligence logic The record of 13 guides the maintenance personnel to measure the electrical signals of each circuit node, and gradually narrows the range of possible faulty components, helping users to correctly determine the faulty components or lines of the circuit. This process can be a step-by-step measurement of man-machine interaction. It can also be a batch measurement of each circuit node to determine the fault location. Figure 2 is an embodiment. The graphical interface program 11 displays the guide test screen 21 and the outer frame icon 25 displays the circuit node Physical location. After the measurement personnel completes the measurement action with the measurement device 16, the graphical interface program 11 then displays a guiding test screen 22 to guide the measurement personnel to measure the next circuit node. The guiding test screen 22 will The outer frame icon 26 shows the physical location of the circuit node, just like the guided test screen 21 and the guided test screen 22. After the program of measuring the circuit node 23 step by step, the graphical interface program 11 can be used to determine the fault of the circuit board under test. The component or circuit is displayed in the fault judgment diagram 24.

The graphical interface program 11 provides a graphical operation interface for maintenance personnel, and can manage the account and password of the maintenance personnel. The program can define the measurement items that the maintenance personnel can operate according to the account and password, and the program can also record the maintenance personnel logging into the system Time and measurement items.

The graphical interface program 11 has three modes: overall function test, single function test, and component maintenance test. The program will test the power supply and signal source 15, the measurement equipment 16 and the circuit board 18 under test, etc. physical photos or equivalent pictures The type is displayed on the screen, and the maintenance personnel are guided to connect it physically.

When the graphical interface program 11 works in the overall function test mode, the program will feed the necessary test power and signal sources to the circuit board under test 18 according to the record of the artificial intelligence logic 13, and according to the circuit board recorded in the artificial intelligence logic 13 The test steps and processes automatically perform the overall functional test of the circuit board 18 under test. During the test, the graphical interface program 11 will also access the node electrical characteristic data table 12 to determine whether the circuit is normal. When the circuit function is abnormal, the graphical interface Program 11 can suspend or skip specific test steps according to the record of the artificial intelligence logic 13, so as to avoid generating meaningless test data or continuing to input test signals in case of circuit failure, which will further expand the scope of the failure. , The test program of this overall function test also has functions such as manual pause, manual stop, fixed-point pause, single-step forward, single-step backward, or conditional pause based on the measurement signal, so that maintenance personnel can use the circuit board at any time as needed The input and output stay in a specific state, and the graphical interface program 11 can be converted to the component maintenance test mode at any time through graphical operations.

When the graphical interface program 11 is working in the single function test mode, the tester can click on the icon on the graphical interface program 11 to perform a single function test of the circuit board to be tested. The program will compare the artificial intelligence according to the selected test function The record of logic 13 feeds the necessary test power and signal sources to the circuit board under test 18, and performs the test of the circuit board 18 according to the circuit board test steps and procedures recorded in the artificial intelligence logic 13 Single function test. During the test, the graphical interface program 11 will also access the node electrical characteristic data table 12 to determine whether the circuit is normal. When the circuit function is abnormal, the graphical interface program 11 can be based on the record of the artificial intelligence logic 13 Pause or skip specific test steps to avoid generating meaningless test data or to continue to input test signals in the case of circuit failure, which will further expand the scope of the failure. On the other hand, the test procedure for this single function test has manual Pause, manual stop, fixed-point pause, single-step forward, single-step backward, or conditional pause based on the measurement signal, so that maintenance personnel can keep the input and output of the circuit board in a specific state at any time as needed. The graphical operation turns the graphical interface program 11 into a component maintenance test mode.

When the graphical interface program 11 works in the component maintenance test mode, the program will display the circuit diagram or schematic diagram of the circuit board to be tested, as well as physical photos, and show the comparison relationship with icons, which is convenient for maintenance personnel to find on the circuit board to be tested 18 The position of the circuit node to be measured. The graphical interface program 11 also has a graphical interface that allows the maintenance personnel to select the power and signal source to be input to the circuit board 18 to be tested. At this time, the maintenance personnel can use the detection provided by the measurement device 16 Needle or test rod to measure the circuit node, the measured electrical signal will be displayed in the operation screen, on the other hand, the graphical interface program 11 will access the node electrical characteristic data table 12 and display the correct electrical of each circuit node Features can be compared by maintenance personnel in the operation screen. The graphical interface program 11 can also display the meaning of common abnormal signals of each circuit node and troubleshooting guidelines by clicking on the icon, helping maintenance personnel to quickly eliminate circuit faults

The node electrical characteristic data table 12 and the artificial intelligence logic 13 are established by engineers who understand the operation of the circuit board to be tested, and are not available to the maintenance personnel who use this system. To understand in detail, just follow the measurement steps prompted by the graphical interface program 11 to perform circuit troubleshooting.

The maintenance notes 17 are information recorded on the computer platform 14. The recording form can be in the form of a conventional database system, text tables, table arrays of program codes, etc. The maintenance personnel can create and edit each circuit node by clicking on the icon The maintenance notes 17 of, accumulate maintenance experience. When the graphical interface program 11 works in the component maintenance test mode, it can display the contents of the maintenance notes 17 of each circuit node, helping the maintenance personnel to quickly find the faulty component or circuit from the past maintenance experience

Figure 3 shows an example of the graphical interface program 11 displaying the circuit diagram or schematic diagram of the circuit board to be tested and a physical photo. The operation screen will have a circuit diagram frame 31 showing the circuit diagram or schematic diagram of the circuit board to be tested, and Another photo frame 32 displays the physical photos of the circuit board to be tested, and displays the comparison relationship with icons. After the maintenance personnel select specific electronic components on the external frame icon 33 on the circuit diagram frame 31, the graphical interface program 11 will be displayed at the same time The physical photo of the circuit board to be tested is displayed in the photo frame 32, and the outer frame icon 34 in the physical photo indicates the same specific electronic component.

Figure 4 shows an embodiment of the graphical interface program 11 showing the correct electrical and editing maintenance notes 17 that the circuit node should have under normal operation. The operation screen will have a circuit diagram box 41 showing the circuit diagram or principle of the circuit board to be tested Figure, a correct electrical characteristics frame 42 shows the normal electrical characteristics of the circuit node and a edit frame 43 for the maintenance personnel to edit Maintenance note 17, after the maintenance personnel select a specific circuit node in the outer frame icon 44 on the circuit diagram box 41, the correct electrical characteristics diagram box 42 will display the normal electrical characteristics of the circuit node at the same time. Edit the diagram box 43 for the maintenance personnel to edit this Overhaul notes for circuit nodes 17.

11‧‧‧Graphic interface program

12‧‧‧Node electrical characteristics data sheet

13‧‧‧Artificial Intelligence Logic

14‧‧‧Computer platform

15‧‧‧Test power and signal source

16‧‧‧Measuring equipment

17‧‧‧Overhaul notes

18‧‧‧Circuit board to be tested

Claims (8)

A circuit maintenance system, including: a graphical interface program, a node electrical characteristics data table, an artificial intelligence logic, a computer platform, a test power supply and signal source, a measurement equipment and a maintenance note, the node electrical characteristics data table Record the correct electrical characteristics of the circuit node, such as voltage, current, waveform, frequency, etc., and record the meaning of the common abnormal signals of the circuit node, the correlation between different circuit nodes, and troubleshooting guidelines. The computer The platform can be used to execute the graphical interface program to provide a graphical operation interface for maintenance personnel, manage the measurement permissions that the maintenance personnel can operate, and record the items measured by the maintenance personnel. The graphical interface program has an overall function test and a single function test. The three modes of test and component maintenance test can guide the maintenance personnel to feed the power and test signals generated by the test power supply and signal source to the circuit board under test, and use the measurement equipment to measure the input and output signals of the circuit, and then according to the artificial intelligence Logic judges whether the circuit is normal. When the circuit is abnormal, the graphical interface program will direct the test power supply and signal source to generate the necessary power and test signals into the circuit board to be tested and guide the maintenance personnel to use the measuring equipment to gradually measure certain specific According to the measured electrical signal, the graphical interface program will use the artificial intelligence logic and the electrical characteristics of the node to determine possible fault points, and gradually narrow the range of possible faulty components to help users correctly determine the circuit’s Faulty components or circuits, the graphical interface program can display the circuit diagram or schematic diagram of the circuit board to be tested, and physical photos, and graphically display the comparison relationship, which is convenient for maintenance personnel to find the location of the circuit node to be measured. The graphical interface program can Access the electrical characteristics data table of the node and display the correct electrical characteristics of the circuit node for comparison by maintenance personnel. It can also display the meaning of common abnormal signals of each circuit node and troubleshooting guidelines to help maintenance personnel quickly eliminate circuit faults. Maintenance personnel can Click on the icon to create and edit the maintenance notes of each circuit node to accumulate maintenance experience. Such as the circuit maintenance system of claim 1, in which the computer platform can be used to execute the graphical interface program It can be composed of a conventional host or a dedicated embedded system. The computer platform has conventional graphical display devices such as a screen, a touch screen, a keyboard, a mouse, and other user operation interfaces. For example, the circuit maintenance system of claim 1, in which the test power supply and signal source can provide the voltage and current sources required for the maintenance of the circuit board, and at the same time can provide the signal source required for the maintenance of the circuit board, and the way to generate these power and signal sources can be The conventional power supply equipment or signal source equipment provided by the instrument manufacturer can also be an electronic circuit equipment specially designed for a specific circuit board to be tested. The test power supply and signal source are electrically connected to the computer platform and can be Controlled by the graphic interface program, set the output signal form and output timing. The test power supply and signal source are designed with input and output interfaces suitable for the circuit board to be tested. The input and output interfaces can be physically connected to the circuit board to be tested, so as to follow the graphics The operation process and stages of the interface program feed the required power and signal sources into the circuit board to be tested for maintenance. For example, the circuit maintenance system of claim 1, wherein the node electrical characteristic data table is the information recorded on the computer platform, and its recording form can be a conventional database system, text table, code table array, etc., and its recorded content There are correct electrical characteristics of each circuit node, such as voltage, current, waveform, frequency, the meaning of common abnormal signals of each circuit node, the correlation between different circuit nodes, troubleshooting guidelines and other information to make the graph The interface program can easily access its data. For example, the circuit maintenance system of claim 1, where the measuring equipment can measure the electrical characteristics of the circuit board to be tested, such as voltage, current, waveform, frequency, etc., and the measurement location includes the complete input of the circuit board to be tested , Output signals and individual circuit nodes, etc. The measuring equipment can be a commercially available measuring instrument, or an electronic circuit specially designed for a specific circuit board to be tested. The measuring equipment is electrically connected to the computer platform. It can be controlled by the graphical interface program, so the measurement results can be read by the graphical interface program. The measurement equipment is designed for The input and output interfaces of the circuit board can be physically connected to the circuit board to be tested, so that the electrical signals of the circuit board to be tested can be read according to the operation flow and stage of the graphical interface program. At the same time, the measurement equipment is designed with a handheld Probes or test rods can be in the form of conventional single test rods or various circuit fixtures, which are convenient for maintenance personnel to measure the electrical signals of circuit nodes on the circuit board to be tested. At the same time, these probes or test rods can The sharp probe is designed so that the maintenance personnel can force the insulation coating or even the plastic puncture on the circuit board to be tested for electrical signal measurement. For example, the circuit maintenance system of claim 1, in which the artificial intelligence logic is information recorded on the computer platform, and its recording form can be a conventional database system, text table, code table array, etc., and its recorded content includes waiting The power supply and signal source that should be provided during the operation of the test circuit board, the steps and processes of the circuit board test, the corresponding input and output relationship of the circuit board to be tested under normal conditions, the graphical interface program can be accessed by the artificial intelligence logic Perform a series of automatic test procedures on the circuit board to be tested. The graphical interface program can pause at a certain test step of a series of test procedures based on the record of the artificial intelligence logic, or manually decide to proceed to the next test step, or Return to the previous test step, and the maintenance personnel can set the test program to be suspended in a specific test step in order to observe or eliminate the circuit abnormalities that only appear on the circuit board under a specific combination of input conditions or a specific operation sequence. The artificial intelligence logic At the same time, it records the test steps and processes when the circuit board to be tested is abnormal. The graphical interface program can guide the maintenance personnel to use the measurement equipment to perform a series of electrical measurements of the circuit nodes. The artificial intelligence logic records the maintenance The judgment logic of the circuit board to be tested, after guiding the maintenance personnel to measure the electrical signals of each circuit node, the graphical interface program can gradually narrow the range of possible faulty components according to the electrical characteristics of the node and the records of the artificial intelligence logic. Help users to correctly determine the faulty components or lines of the circuit. This process can be a step-by-step operation of human-computer interaction, or it can be a batch measurement of each circuit node to make the fault part Bit of judgment. For example, the circuit maintenance system of claim 1, in which the graphical interface program provides a graphical operation interface for maintenance personnel, and can manage the account and password of the maintenance personnel. The graphical interface program can define what the maintenance personnel can operate according to the account and password At the same time, the graphical interface program can also record the time of the maintenance personnel logging into the system and the measured items; the graphical interface program has three modes of overall function test, single function test and component maintenance test. The graphical interface program will Display physical photos of the test power supply and signal source, the measurement equipment and the circuit board under test, or their equivalent graphics on the screen, and guide the maintenance personnel to the test power supply and signal source, the measurement equipment and the test The circuit board is physically and electrically connected; when the graphical interface program works in the overall functional test mode, the graphical interface program will feed the necessary test power and signal sources to the circuit board under test according to the record of the artificial intelligence logic, and according to the The circuit board test steps and procedures recorded by artificial intelligence logic automatically perform the overall functional test of the circuit board to be tested. During the test, the graphical interface program will also access the node electrical characteristic data table to determine whether the circuit is normal. When the circuit function is abnormal , The graphical interface program can suspend or skip specific test steps according to the artificial intelligence logic record, so as to avoid generating meaningless test data or continuing to input test signals in the case of circuit failure, which will further expand the scope of the failure; When the graphical interface program is working in the overall function test mode, the test program has functions such as manual pause, manual stop, fixed-point pause, single-step forward, single-step backward, or conditional pause based on the measurement signal, so that the maintenance personnel can whenever needed. And make the input and output of the circuit board stay in a specific state and can switch to the component maintenance test mode of the graphical interface program at any time; when the graphical interface program is working in the component maintenance test mode, the graphical interface program will display the circuit board under test Circuit diagrams or schematic diagrams, and physical photos, with icons showing their comparison relationship, which is convenient for maintenance personnel to find the location of circuit nodes to be measured on the circuit board to be tested. The graphical interface program also has a graphical interface for maintenance personnel to choose Input the power and signal source of the circuit board to be tested, this The maintenance personnel can use the probes or test rods provided by the measuring equipment to measure the circuit nodes, and the measured electrical signals will be displayed on the operation screen. On the other hand, the graphical interface program will access the node electrical The characteristic data table also displays the correct electrical characteristics of each circuit node in the operation screen for the maintenance personnel to compare. The graphical interface program can also display the meaning of common abnormal signals of each circuit node and troubleshooting guidelines by clicking on the icon. Maintenance personnel quickly troubleshoot the circuit. For example, the circuit maintenance system of claim 1, in which the maintenance notes are information recorded on the computer platform, and the recording form can be a conventional database system, text tables, table arrays of code, etc. The maintenance personnel can click on the icon Select the method to create and edit the maintenance notes of each circuit node to accumulate maintenance experience. When the graphical interface program is working in the component maintenance test mode, it can display the maintenance notes of each circuit node, helping the maintenance personnel to quickly find the faulty component from the past maintenance experience Or line.

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