Circuit board maintenance device

Abstract

The utility model discloses a circuit board maintenance device. The device comprises a master control module, an electrical performance detection module, an input acquisition module and a temperature and humidity detection module. The electrical performance detection module is connected with the main control module and is used for detecting the voltage and current of a target detection point on the circuit board to be detected, transmitting the voltage and current to the main control module and displaying the voltage waveform of the target detection point. The input acquisition module is respectively connected with the main control module and the input end of the circuit board to be detected and is used for acquiring electrical parameters of the input end of the circuit board to be detected and transmitting the electrical parameters to the main control module; wherein the electrical parameters comprise input current, input current frequency, input voltage, input voltage frequency and input power. The temperature and humidity detection module is connected with the main control module and used for detecting the temperature and humidity of the working environment where the to-be-detected circuit board is located and transmitting the temperature and humidity to the main control module. According to the utility model, the circuit board maintenance precision and efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit board repair technology, and in particular to a circuit board repair device. Background Technology

[0002] With the rapid development of electronic technology, circuit boards have become an indispensable core component in various electronic and automated equipment. However, due to factors such as the usage environment, improper operation, or equipment aging, circuit boards may experience various malfunctions, requiring repair. Therefore, their repair and maintenance are particularly important. Circuit board repair requires professional knowledge and skills to identify and detect various faults, and to repair or replace them. During the repair process, various tools and instruments are needed, such as multimeters, oscilloscopes, soldering irons, and hot air guns. Furthermore, repair personnel need to be familiar with the circuit board's schematic diagram and layout to quickly locate and repair faults.

[0003] Current circuit board repair methods primarily rely on visual inspection and multimeter testing, resulting in low accuracy. Furthermore, the complexity of circuit board structures and the diversity of fault types mean that the repair process is time-consuming and labor-intensive, leading to low efficiency. Utility Model Content

[0004] This invention provides a circuit board repair device that improves the accuracy of circuit board repair while reducing the manpower and time required, thereby increasing the efficiency of circuit board repair.

[0005] According to one aspect of the present invention, a circuit board repair device is provided, comprising:

[0006] Main control module;

[0007] An electrical performance testing module, connected to the main control module, is used to detect the voltage and current of the target testing point on the circuit board under test and transmit them to the main control module, as well as to display the voltage waveform of the target testing point;

[0008] An input acquisition module is connected to the input terminals of the main control module and the circuit board under test, respectively, and is used to acquire the electrical parameters of the input terminals of the circuit board under test and transmit them to the main control module; wherein, the electrical parameters include input current, input current frequency, input voltage, input voltage frequency, and input power;

[0009] A temperature and humidity detection module, connected to the main control module, is used to detect the temperature and humidity of the working environment where the circuit board under test is located and transmit the data to the main control module.

[0010] Optionally, the input terminals of the circuit board under test include: a first input terminal and a second input terminal; the input acquisition module is connected between the first input terminal and the second input terminal;

[0011] The circuit board repair device further includes: a protection circuit; the protection circuit includes:

[0012] The first light-emitting unit is connected between the first power supply terminal of the protection circuit and the first input terminal of the circuit board under test. The second power supply terminal of the protection circuit is connected to the second input terminal of the circuit board under test. The first power supply terminal of the protection circuit is connected to a power signal, and the second power supply terminal of the protection circuit is grounded.

[0013] The first switch is connected in parallel to both ends of the first light-emitting unit.

[0014] Optionally, the input acquisition module and the protection circuit are integrated on the same circuit board.

[0015] Optionally, the electrical performance testing module includes:

[0016] A current detection unit, connected to the main control module, is used to detect the current at the target detection point on the circuit board to be tested and transmit it to the main control module.

[0017] A voltage detection unit, connected to the main control module, is used to detect the voltage at the target detection point on the circuit board to be tested and transmit it to the main control module.

[0018] The waveform display unit is connected to the main control module and is used to acquire the voltage of the target detection point on the circuit board to be tested and transmit it to the main control module, and display the voltage waveform of the target detection point according to the control of the main control module.

[0019] Optionally, the waveform display unit includes: a first detection terminal, a second detection terminal, a signal amplification unit, a status indication unit, a mode switching unit, and a first display unit;

[0020] The first detection terminal is connected to the target detection point, and the second detection terminal is grounded;

[0021] The signal amplification unit is connected between the first detection terminal and the main control module;

[0022] The status indication unit is connected between the main control module and ground;

[0023] The mode switching unit is connected to the main control module and is used to control the display mode of the first display unit;

[0024] The first display unit is connected to the main control module and is used to display the voltage waveform of the target detection point.

[0025] Optionally, the signal amplification unit includes: a first potentiometer and a first resistor, a first end of the first resistor is connected to the first detection terminal, a second end of the first resistor is connected to the first connection terminal of the first potentiometer and to the sliding terminal of the first potentiometer, the sliding terminal of the first potentiometer is connected to the main control module, and the second connection terminal of the first potentiometer is connected to the main control module;

[0026] The status indication unit includes: a light-emitting diode and a second resistor, wherein the first terminal of the light-emitting diode is grounded, the second terminal of the light-emitting diode is connected to the first terminal of the second resistor, and the second terminal of the second resistor is connected to the main control module;

[0027] The mode switching unit includes: multiple switching sub-units; each switching sub-unit includes: a button and a third resistor;

[0028] For any switching subunit, the first end of the third resistor is connected to the main control module, the second end of the third resistor is connected to the first end of the button and serves as the output end of the switching subunit, which is connected to the main control module, and the second end of the button is grounded;

[0029] In this configuration, the first end of the third resistor in different switching subunits is connected to the same end of the main control module, and the output ends of different switching subunits are connected to different ends of the main control module.

[0030] Optionally, the current detection unit includes: an AC / DC sensor;

[0031] The AC / DC sensor is connected in series with the target detection point in the circuit where the target detection point is located, and the output terminal of the AC / DC sensor is connected to the main control module;

[0032] And / or,

[0033] The current detection unit includes: a Hall current sensor;

[0034] The Hall current sensor includes a first coil, the line where the target detection point is located passes through the center hole of the first coil, and the output terminal of the Hall current sensor is connected to the main control module;

[0035] And / or,

[0036] The voltage detection unit includes: a voltage sensor;

[0037] The output terminal of the voltage sensor is connected to the main control module, and the detection terminal of the voltage sensor is connected to the target detection point.

[0038] Optionally, the temperature and humidity detection module includes a temperature and humidity sensor and a fourth resistor;

[0039] The temperature and humidity sensor is placed in the working environment of the circuit board under test. The output terminal of the temperature and humidity sensor is connected to the main control module and to the first terminal of the fourth resistor. The second terminal of the fourth resistor is connected to the power signal.

[0040] Optionally, the circuit board repair device further includes: a capacitance detection circuit;

[0041] The capacitance detection circuit includes a second potentiometer and a fifth resistor. The first connection terminal of the second potentiometer is connected to a power signal. The sliding terminal of the second potentiometer is connected to the second connection terminal of the second potentiometer and to the first terminal of the fifth resistor and the main control module. The second terminal of the fifth resistor is connected to the main control module.

[0042] The capacitor on the circuit board to be tested is connected between the second terminal of the second potentiometer and the ground terminal of the capacitor detection circuit.

[0043] Optionally, the circuit board repair device further includes: a display module connected to the main control module;

[0044] And / or, a communication module connected to the main control module; the communication module includes a Bluetooth communication unit, the transmission end of which is connected to the main control module;

[0045] And / or, a power module, connected to the main control module;

[0046] And / or, a chip detection module, connected to the main control module, the chip detection module being used to detect whether the chip devices on the circuit board to be tested are short-circuited;

[0047] And / or, the main control module includes: a microcontroller.

[0048] The technical solution of this utility model embodiment includes a circuit board repair device comprising a main control module, an electrical performance testing module, an input acquisition module, and a temperature and humidity detection module. The electrical performance testing module can acquire the current and voltage of the target testing point and display the voltage waveform, providing a more intuitive reflection of the target testing point's operating status. By acquiring the electrical parameters of the input terminals of the circuit board under test, the system can initially determine whether the fault occurs at the input terminal during repair. If the electrical parameters at the input terminal are normal, the fault can be pinpointed to the circuit board under test, thereby improving repair efficiency. Furthermore, detecting the electrical parameters at the input terminal ensures that the testing is performed when the parameters are within the normal range, improving repair accuracy. The temperature and humidity detection module 40 detects the temperature and humidity of the environment where the circuit board under test is located, effectively considering the influence of ambient temperature and humidity on the test results, ensuring the accuracy and reliability of the test results.

[0049] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 A schematic diagram of the structure of a circuit board repair device provided in an embodiment of this utility model;

[0052] Figure 2 A schematic diagram of another circuit board repair device provided in this embodiment of the present utility model;

[0053] Figure 3 A schematic diagram of another circuit board repair device provided in this embodiment of the present utility model;

[0054] Figure 4 A schematic diagram illustrating the connection relationship between an input acquisition module and a protection circuit provided in an embodiment of this utility model;

[0055] Figure 5 A schematic diagram of the structure of a main control module provided in an embodiment of this utility model;

[0056] Figure 6 A schematic diagram of the structure of a waveform display unit provided in an embodiment of this utility model;

[0057] Figure 7 A schematic diagram of the structure of a current detection unit provided in an embodiment of this utility model;

[0058] Figure 8 This is a schematic diagram of another current detection unit provided in an embodiment of the present invention;

[0059] Figure 9 A schematic diagram of the structure of a voltage detection unit provided in an embodiment of this utility model;

[0060] Figure 10 A schematic diagram of the structure of a temperature and humidity detection module provided in an embodiment of this utility model;

[0061] Figure 11 A schematic diagram of a capacitance detection circuit provided in an embodiment of this utility model;

[0062] Figure 12 A schematic diagram of the structure of a communication module provided in an embodiment of this utility model;

[0063] Figure 13 This is a schematic diagram of the structure of a display module provided in an embodiment of the present utility model;

[0064] Figure 14 This is a schematic diagram of the structure of a power module provided in an embodiment of the present utility model. Detailed Implementation

[0065] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0066] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and their variations, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0067] This utility model provides a circuit board repair device. Figure 1 A schematic diagram of a circuit board repair device provided in an embodiment of this utility model is shown below. Figure 1 The circuit board repair device includes: a main control module 10, an electrical performance testing module 20, an input acquisition module 30, and a temperature and humidity detection module 40.

[0068] The electrical performance testing module 20 is connected to the main control module 10. It detects the voltage and current at target testing points on the circuit board under test and transmits this data to the main control module 10, as well as displaying the voltage waveform at the target testing points. The input acquisition module 30 is connected to both the main control module 10 and the input terminals of the circuit board under test. It collects the electrical parameters of the input terminals of the circuit board under test and transmits them to the main control module 10. These electrical parameters include input current, input current frequency, input voltage, input voltage frequency, and input power. The temperature and humidity detection module 40 is connected to the main control module 10. It detects the temperature and humidity of the operating environment of the circuit board under test and transmits this data to the main control module 10. Target testing points can be understood as devices or nodes on the circuit board under test that significantly affect its performance.

[0069] Each functional module can operate independently to test different parts of the circuit board to be tested.

[0070] The electrical performance testing module 20 may include components for detecting current, such as a current transformer, components for detecting voltage, such as a voltage sensor, and components for display, such as a display screen, all connected to the main control module 10. Each testing component can operate independently, meaning it can individually detect the voltage and current at a target testing point on the circuit board under test and transmit the detection data to the main control module 10. When the main control module 10 receives the voltage at the target testing point, it further displays the waveform of the voltage changing over time using the display component.

[0071] The input acquisition module 30 may include a second coil, which is wound using the principle of electromagnetic induction. The module acquires the current, voltage and frequency at both ends of the second coil, amplifies the acquired data and transmits it to the main control module 10. The main control module 10 processes the received data and further calibrates the received data to obtain the actual data at the input end.

[0072] The temperature detection module 40 can be placed in the environment where the circuit board under test is located, so as to detect the temperature and humidity of the environment when the circuit board is being tested, thereby ensuring the accuracy and reliability of the test results. For example, by detecting the temperature of the environment where the circuit board is located, the testing process can be carried out within a standard temperature range, thus avoiding the influence of temperature on the performance parameters of the circuit board, and ensuring the accuracy and consistency of the test results. It also ensures that the testing equipment operates within a specified temperature range, thereby improving the reliability of the test. By detecting the humidity of the environment where the circuit board is located, it can be ensured that the humidity is maintained within a suitable range (e.g., 40%-60% relative humidity), thereby reducing the generation of static electricity and preventing electrostatic damage to the circuit board.

[0073] The technical solution of this utility model embodiment includes a circuit board repair device comprising a main control module 10, an electrical performance testing module 20, an input acquisition module 30, and a temperature and humidity detection module 40. The electrical performance testing module 20 can acquire the current and voltage of the target testing point and display the voltage waveform, providing a more intuitive reflection of the target testing point's operating status. By acquiring the electrical parameters of the input terminal of the circuit board under test using the input acquisition module 30, it is possible to initially determine whether the fault occurs at the input terminal during repair. If the electrical parameters at the input terminal are normal, the fault can be pinpointed to the circuit board under test, thereby improving repair efficiency. Furthermore, detecting the electrical parameters at the input terminal ensures that the testing is performed when the parameters are within the normal range, improving repair accuracy. The temperature and humidity detection module 40 detects the temperature and humidity of the environment surrounding the circuit board under test, effectively considering the influence of ambient temperature and humidity on the test results, ensuring the accuracy and reliability of the test results.

[0074] Figure 2 A schematic diagram of another circuit board repair device provided in this embodiment of the present invention is shown below. Figure 2 Optionally, based on the above embodiments, the circuit board repair device further includes a protection circuit 50, which is connected to the main control module 10.

[0075] Specifically, the protection circuit 50 is used for short circuit protection. For example, when the circuit board under test is powered on, if a short circuit occurs on the circuit board under test, the protection circuit 50 can prevent secondary damage to the electronic components, thereby eliminating the problem that the circuit board under test is damaged, which is not conducive to repair and poses a safety hazard.

[0076] See also Figure 2 Optionally, the circuit board repair device also includes a capacitance detection circuit 60 for detecting the capacitance value on the circuit board under test. By setting up a separate capacitance detection circuit 60, it can be dedicated to the repair of capacitor components.

[0077] See also Figure 2 Optionally, the circuit board inspection device also includes a display module 70 connected to the main control module 10. The display module 70 can display the data information received by the main control module 10, so as to more intuitively reflect the working status of the target inspection point.

[0078] See also Figure 2 Optionally, the circuit board repair device also includes a communication module 80, which is connected to the main control module 10. The communication module 80 is used to remotely transmit the data received by the main control module 10 to the mobile terminal, so that the user can more intuitively understand the various parameters of the circuit board under test.

[0079] See also Figure 2 Optionally, the circuit board repair device further includes a chip detection module 90, connected to the main control module 10. The chip detection module 90 is used to detect whether the chip devices on the circuit board under test are short-circuited. The chip devices may include diodes, transistors, switching transistors, and chip-level devices. The chip detection module 90 can test the voltage, current, and resistance of the chip devices to verify the correctness of the circuit connections and whether the electrical parameters meet the specified range, thereby improving the repair efficiency and accuracy of critical areas on the circuit board under test.

[0080] See also Figure 2 Optionally, the circuit board repair device also includes a power supply module 91 connected to the main control module 10. The power supply module 91 is used to supply power to each functional module. For example, the power supply module 10 supplies power at a voltage of 5V.

[0081] In summary, the circuit board repair device provided by this utility model, by setting up multiple functional modules, can address the problems of time-consuming and labor-intensive repairs caused by the complex structure and diverse fault types of the circuit boards under test. It can also achieve standardized repair procedures for the circuit boards under test, while simplifying the complexity of multi-functional module collaboration. Furthermore, it can improve the accuracy and reliability of the circuit board repair device. Each functional module can be set to a corresponding functional area within the circuit board repair device, with each area used to perform its corresponding repair function. This setup ensures clear division of functional areas, convenient operation, and effectively solves the problem of misjudgment or missed detections during repairs due to a lack of skills and experience among staff. Moreover, each functional area directly corresponds to the testing requirements of the circuit under test, resulting in clear division of labor and high measurement accuracy. The independent operation of each functional area not only improves repair efficiency and reduces time costs but also addresses the problems of time-consuming and labor-intensive repairs caused by the complex structure and diverse fault types of circuit boards.

[0082] Understandably, this inspection device can inspect various target points on the circuit board to be inspected, thus enabling precise detection of minor defects or hidden faults and improving inspection accuracy.

[0083] Therefore, the circuit board repair device provided by this utility model can overcome the limitations of existing circuit board repair operations. For example, existing circuit board repair procedures involve observing the chip sockets to see if they have been forcibly pried open due to the lack of specialized tools. Observe the chips on the circuit board; if they have sockets, first check if the chips are inserted incorrectly. This is mainly to prevent operators from inserting the chips in the wrong position or orientation when repairing the circuit board themselves. If the circuit board has shorting terminals, check if the shorting terminals are inserted incorrectly. Observe whether any components on the circuit board are burnt out. For example, check if resistors, capacitors, and diodes are blackened or charred. Observe the integrated circuits on the circuit board, such as CPU, coprocessor, and AD chips, for bulging, cracks, burning, or blackening. If such conditions occur, it can be basically determined that the chip has been burned out and must be replaced. Observe whether the traces on the circuit board are peeling, burnt, or broken. Check if the copper vias have detached from the pads. Observe the fuses on the circuit board (including fuses and thermistors) to see if the fuses have blown. Sometimes, because the fuse is too thin to see clearly, a multimeter can be used as an auxiliary tool to determine whether the fuse is damaged.

[0084] Figure 3 A schematic diagram of another circuit board repair device provided in this embodiment of the present invention is shown below. Figure 3 Based on the above embodiments, optionally, the electrical performance testing module 20 includes a current detection unit 21, a voltage detection unit 22, and a waveform display unit 23.

[0085] The current detection unit 21 is connected to the main control module 10. The current detection unit 21 detects the current at the target detection point on the circuit board under test and transmits the data to the main control module 10. The voltage detection unit 22 is also connected to the main control module 10. The voltage detection unit 22 detects the voltage at the target detection point on the circuit board under test and transmits the data to the main control module 10. The waveform display unit 23 is connected to the main control module 10. The waveform display unit 23 acquires the voltage at the target detection point on the circuit board under test, transmits the data to the main control module 10, and displays the voltage waveform at the target detection point according to the control of the main control module 10.

[0086] The following description of the possible structures of each module in the circuit board repair device is not intended to limit the scope of this utility model.

[0087] Figure 4 A schematic diagram illustrating the connection relationship between an input acquisition module and a protection circuit provided in an embodiment of this utility model is shown below. Figure 4The circuit board 100 under test has two input terminals: a first input terminal I1 and a second input terminal I2. The input acquisition module 30 is connected between the first input terminal I1 and the second input terminal I2.

[0088] The protection circuit 50 includes: a first light-emitting unit 51 and a first switch S1.

[0089] The first light-emitting unit 51 is connected between the first power supply terminal V1 of the protection circuit 50 and the first input terminal I1 of the circuit board under test 100. The second power supply terminal V2 of the protection circuit 50 is connected to the second input terminal I2 of the circuit board under test 100. The first power supply terminal V1 of the protection circuit 50 is connected to a power signal, and the second power supply terminal V2 of the protection circuit 50 is grounded. The first switch S1 is connected in parallel across the two ends of the first light-emitting unit 51. The live wire is connected to the first input terminal I1 of the circuit board under test 100 through the first power supply terminal V1, the first light-emitting unit 51 is connected in series with the live wire, and the neutral wire is connected to the second input terminal I2 of the circuit board under test 100 through the second power supply terminal V2.

[0090] Specifically, when a short circuit occurs on the circuit board under test, the brightness of the first light-emitting unit 51 is at its brightest; when no short circuit occurs on the circuit board under test, the brightness of the first light-emitting unit 51 is at a moderate level, and the two different brightness states can be directly distinguished by the human eye. For example, the first light-emitting unit 51 may include an LED bead. The first switch S1 may be a mechanical switch, and the initial state of the first switch S1 is the off state.

[0091] Specifically, when the first light-emitting unit 51 determines that the circuit board 100 under test is not short-circuited, the first switch S1 is closed to short-circuit the first light-emitting unit 51. At this time, the input acquisition module 30 can acquire the electrical parameters of the input terminal of the circuit board 100 under test to obtain the true power consumption of the circuit board 100 under test, which is beneficial to improving the accuracy of the detection and analysis of the circuit board under test.

[0092] See also Figure 3 Optionally, the input acquisition module 30 and the protection circuit 50 are integrated on the same circuit board 200, which helps to reduce the size of the circuit board maintenance device.

[0093] Optionally, based on the above embodiments, the main control module 10 includes a microcontroller. The microcontroller is an integrated circuit chip that uses very large-scale integrated circuit technology to integrate a central processing unit with data processing capabilities, random access memory, read-only memory, multiple I / O ports, an interrupt system, timers / timers, and other functions onto a single silicon chip, forming a small but complete microcomputer system. It coordinates and manages the operation of each functional module, processing and analyzing the detection data received from each functional module. Specifically, Figure 5A schematic diagram of the main control module provided in an embodiment of this utility model is shown below. Figure 5 The main control module 10 includes a microcontroller U1. Microcontroller U1 may include 30 pins, of which pin VIN is used to input a power signal, pin GND is used for grounding, pin RST is used for reset, pin 5V is used to output a 5V voltage, pins A7-A0 are used for input / output analog signals, pin REF is used to provide a reference voltage or reference signal, pin 3V3 is used to output a 3.3V voltage, pins D2-D13 are used for input / output digital signals, pin TXD is used to transmit data, and pin RXD is used to receive data.

[0094] Alternatively, the microcontroller U1 can be an Arduino Uno microcontroller.

[0095] Figure 6 This is a schematic diagram of the structure of a waveform display unit provided in an embodiment of the present invention. See also: Figure 6 The waveform display unit 23 includes a first detection terminal IN1+, a second detection terminal IN1-, a signal amplification unit 231, a status indication unit 232, a mode switching unit 235, and a first display unit 234.

[0096] In this configuration, when detecting any target detection point, a first detection terminal IN1+ can be connected to the target detection point, and a second detection terminal IN1- can be grounded. A signal amplification unit 231 is connected between the first detection terminal IN1+ and the main control module 10. A status indication unit 232 is connected between the main control module 10 and ground. A mode switching unit 235 is connected to the main control module 10 and is used to control the display mode of the first display unit 234. The first display unit 234 is connected to the main control module 10 and is used to display the voltage waveform of the target detection point.

[0097] The mode switching unit 235 controls the display mode of the first display unit 234, including: controlling the first display unit 234 to display the voltage waveform of the target detection point; or controlling the first display unit 234 to switch the measurement frequency; or controlling the first display unit 234 to select the measurement voltage range; or controlling the first display unit 234 to record the voltage peak value. The status indication unit 232 indicates the current energization status between the first detection sub-IN1+ and the second detection sub-IN1-. The main control module 10 includes a microcontroller U1, whose pin VIN is connected to the power signal VCC.

[0098] See also Figure 6Optionally, the signal amplification unit 231 includes: a first potentiometer RS1 and a first resistor R1. The first end of the first resistor R1 is connected to the first detection terminal IN1+. The second end of the first resistor R1 is connected to the first connection terminal of the first potentiometer RS1 and to the sliding terminal of the first potentiometer RS1. The sliding terminal of the first potentiometer RS1 is connected to the main control module 10. The second connection terminal of the first potentiometer RS1 is connected to the main control module 10.

[0099] Specifically, the sliding end of the first potentiometer RS1 is connected to pin A0 of the microcontroller U1, and the second connection end of the first potentiometer RS1 is connected to pin D12 of the microcontroller U1. The first potentiometer RS1 is used to amplify the waveform to make the voltage waveform display more intuitive, and the first resistor R1 is used for current limiting. The second detector IN1- is connected to pin D7 of the microcontroller U1.

[0100] See also Figure 6 Optionally, the status indication unit 232 includes: a light-emitting diode D1 and a second resistor R2, the first terminal of the light-emitting diode D1 is grounded, the second terminal of the light-emitting diode D1 is connected to the first terminal of the second resistor R2, and the second terminal of the second resistor R2 is connected to the main control module 10.

[0101] Specifically, LED D1 is connected to pin D13 of microcontroller U1 through second resistor R2. LED D1 is used for live safety indication and reverse protection to avoid damage to the circuit board repair device. Second resistor R2 is used for current limiting.

[0102] See also Figure 6 Optionally, the mode switching unit 235 includes: a plurality of switching subunits 233; the switching subunit 233 includes: a button K1 and a third resistor R3. Figure 6 An example is given: mode switching unit 235 including four switching subunits 233.

[0103] In any switching subunit 233, the first end of the third resistor R3 is connected to the main control module 10, and the second end of the third resistor R3 is connected to the first end of the button K1, serving as the output terminal of the switching subunit 233, which is also connected to the main control module 10. The second end of the button K1 is grounded. In different switching subunits 233, the first end of the third resistor R3 is connected to the same terminal of the main control module 10, and the output terminals of different switching subunits 233 are connected to different terminals of the main control module 10.

[0104] Specifically, the first end of the third resistor R3 in each of the different switching subunits 233 is connected to pin D2 of the microcontroller U1. The output of the first switching subunit 233 is connected to pin D8 of the microcontroller U1, the output of the second switching subunit 233 is connected to pin D9 of the microcontroller U1, the output of the third switching subunit 233 is connected to pin D10 of the microcontroller U1, and the output of the fourth switching subunit 233 is connected to pin D11 of the microcontroller U1. Button K1 is used to control the display mode of the first display unit 234. For example, when button K1 in one switching subunit 233 is pressed, the first display unit 234 displays the voltage waveform of the target detection point; when button K1 in two switching subunits 233 is pressed, the first display unit 234 switches the measurement frequency; when button K1 in three switching subunits 233 is pressed, the first display unit 234 selects the measurement voltage range; and when button K1 in four switching subunits 233 is pressed, the first display unit 234 records the voltage peak value.

[0105] See also Figure 6 Optionally, the first display unit 234 may include an OLED display screen. The OLED display screen may include a clock terminal (SCL), a data terminal (SDA), a power terminal, and a ground terminal. Specifically, the clock terminal (SCL) of the OLED display screen is connected to pin A5 of the microcontroller U1, the data terminal (SDA) of the OLED display screen is connected to pin A4 of the microcontroller U1, the power terminal (VCC6) of the OLED display screen is connected to pin 5V of the microcontroller U1, and the ground terminal (GND6) of the OLED display screen is connected to pin GND of the microcontroller U1. The OLED display screen is used to display the voltage waveform processed by the microcontroller using the relationship between time and voltage changes.

[0106] A dedicated waveform display unit is used to collect the voltage of the target detection point through the first detection terminal IN1+ and the second detection terminal IN1-, and transmit the data to the microcontroller U1. The microcontroller U1 uses the relationship between time and voltage changes, processes the data, and displays it on an OLED screen. This visual display can more intuitively reflect the working status of key points.

[0107] Since the current sensing unit needs to be connected in series with the circuit where the target detection point is located when performing current detection on a circuit board, different types of current sensing sensors can be selected to accommodate different circuit boards, depending on the ease of disassembly and assembly. These will be explained separately below.

[0108] Based on the above embodiments, in one implementation, the current detection unit 21 includes an AC / DC sensor. The AC / DC sensor is connected in series with the target detection point in the circuit where the target detection point is located, and the output terminal of the AC / DC sensor is connected to the main control module 10. The AC / DC sensor is used to detect a circuit board to be tested that is easy to disassemble and reassemble. Figure 7 A schematic diagram of the structure of a current detection unit provided in an embodiment of this utility model is shown below. Figure 7 The AC / DC sensor U2 is connected in series with the line where the target detection point is located through its first input terminal IN2+ and second input terminal IN2-. The power supply terminal VCC1 of the AC / DC sensor U2 is connected to the power signal VCC, for example, it can be connected to the pin VIN of the microcontroller U1. The ground terminal GND1 of the AC / DC sensor U2 is grounded, for example, it can be connected to the pin GND of the microcontroller U1. The output terminal OUT1 of the AC / DC sensor U2 is connected to the pin D8 of the microcontroller U1.

[0109] Based on the above embodiments, in another embodiment, the current detection unit 21 includes a Hall current sensor. The Hall current sensor includes a first coil, with the line containing the target detection point passing through the center hole of the first coil. The output terminal of the Hall current sensor is connected to the main control module 10. The Hall current sensor is used to detect circuit boards that are inconvenient to disassemble. Figure 8 See the schematic diagram of another current detection unit provided in this embodiment of the present invention. Figure 8 The power supply terminal VCC2 of the Hall current sensor U3 is connected to the power signal VCC, for example, it can be connected to the VIN pin of the microcontroller U1. The ground terminal GND2 of the Hall current sensor U3 is grounded, for example, it can be connected to the GND pin of the microcontroller U1. The analog output terminal AOUT of the Hall current sensor U3 is connected to the A6 pin of the microcontroller U1. The direction of current flow in the circuit where the target detection point is located must be the same as the direction from "+" to "-" marked by arrows in the first coil. The Hall current sensor U3 collects the induced current, voltage, and frequency change at both ends of the first coil, amplifies and processes the collected signal, and then transmits it to the microcontroller U1 for further data processing and calculation to obtain the current at the target detection point.

[0110] Alternatively, in another embodiment, the current detection unit 21 may be equipped with both an AC / DC sensor U2 and a Hall current sensor U3 to improve the versatility and practicality of the circuit board repair device.

[0111] In summary, the device features a dedicated current detection area and offers two modes to adapt to different scenarios. Firstly, an AC / DC sensor U2 is connected in series in the circuit for easily disassembled circuit boards during repair. Secondly, a Hall effect current sensor U3, based on the principle of electromagnetic induction, winds a first coil to collect the induced current, voltage, and frequency changes at both ends of the coil. The signals are then amplified and processed for testing and repairing circuit boards that are difficult to disassemble. Both methods transmit the data to the microcontroller U1 for further processing and calculation, enhancing the device's versatility.

[0112] Figure 9 A schematic diagram of a voltage detection unit provided in an embodiment of this utility model is shown below. Figure 9 Based on the above embodiments, optionally, the voltage detection unit 22 includes a voltage sensor U4. The output terminal OUT2 of the voltage sensor U4 is connected to the main control module 10, and the detection terminal of the voltage sensor U4 is connected to the target detection point.

[0113] The voltage sensor U4 includes a third detection terminal IN3+ and a fourth detection terminal IN3-. When detecting voltage at any target detection point, the third detection terminal IN3+ and the fourth detection terminal IN3- of the voltage sensor U4 are connected to the two ends of the voltage being measured for voltage detection. For example, the third detection terminal IN3+ of the voltage sensor U4 can be connected to the target detection point, and the fourth detection terminal IN3- of the voltage sensor U4 can be grounded.

[0114] Specifically, the power supply terminal VCC3 of the voltage sensor U4 is connected to the power signal VCC, for example, it can be connected to the pin VIN of the microcontroller U1. The ground terminal GND3 of the voltage sensor U4 is grounded, for example, it can be connected to the pin GND of the microcontroller U1. The output terminal OUT2 of the voltage sensor U4 is connected to the pin D3 of the microcontroller U1.

[0115] Figure 10 A schematic diagram of a temperature and humidity detection module provided in an embodiment of this utility model is shown below. Figure 10 Based on the above embodiments, the temperature and humidity detection module 40 may optionally include a temperature and humidity sensor U5 and a fourth resistor R4.

[0116] The temperature and humidity sensor U5 is placed in the working environment of the circuit board under test. The output terminal DATA of the temperature and humidity sensor U5 is connected to the main control module 10 and to the first terminal of the fourth resistor R4. The second terminal of the fourth resistor R4 is connected to the power signal VCC.

[0117] Specifically, the power supply terminal VDD of the temperature and humidity sensor U5 is connected to the power signal VCC, for example, it can be connected to the VIN pin of the microcontroller U1. The ground terminal GND4 of the temperature and humidity sensor U5 is grounded, for example, it can be connected to the GND pin of the microcontroller U1. The unconnected terminal NC of the temperature and humidity sensor U5 is left floating. The output terminal DATA of the temperature and humidity sensor U5 is connected to the D3 pin of the microcontroller U1. The fourth resistor R4 is a pull-up resistor. The temperature and humidity sensor U5 is used to transmit the temperature and humidity of the working environment of the circuit board under test to the microcontroller U1.

[0118] Figure 11 A schematic diagram of a capacitance detection circuit provided in an embodiment of this utility model is shown below. Figure 11 Based on the above embodiments, optionally, the capacitance detection circuit 60 includes a second potentiometer RS2 and a fifth resistor R5. The first connection terminal of the second potentiometer RS2 is connected to a power signal, the sliding terminal of the second potentiometer RS2 is connected to the second connection terminal of the second potentiometer RS2, and is connected to the first terminal of the fifth resistor R5 and the main control module 10. The second terminal of the fifth resistor R5 is connected to the main control module 10.

[0119] In this circuit, capacitor CX on the circuit board under test is connected between the second terminal of the second potentiometer RS2 and the ground terminal of the capacitor detection circuit. During capacitance detection, the capacitance value is indirectly calculated by measuring the charging and discharging time of the capacitor, utilizing its charging and discharging characteristics. The resistance values ​​of the second potentiometer RS2 and the fifth resistor R5 are known. For example, the first terminal of the second potentiometer RS2 is connected to the power signal VCC, such as pin VIN of the microcontroller U1; the second terminal of the second potentiometer RS2 is connected to pin A3 of the microcontroller U1; the second terminal of the fifth resistor R5 is connected to pin D13 of the microcontroller U1; and the ground terminal of the capacitor detection circuit 60 is grounded, such as pin GND of the microcontroller U1. When pin VIN of the microcontroller U1 outputs a high level, capacitor CX is charged. Simultaneously, the voltage across capacitor CX is input to the microcontroller U1 through the fifth resistor R5 to monitor the charging process of capacitor CX.

[0120] Specifically, when the VIN pin of microcontroller U1 outputs a high level to charge capacitor CX, microcontroller U1 simultaneously starts its internal timer and begins timing. When the voltage value detected by pin A3 of microcontroller U1 reaches a preset voltage threshold, the timer stops timing. Furthermore, the capacitance value can be calculated based on the charging time, the known resistance value, and the charging time constant formula. It can be understood that during the capacitance detection process, microcontroller U1 needs to continuously read the voltage value of its pin A3 and compare it with the preset voltage threshold; when the condition is met, it obtains the timer value for calculation.

[0121] The time constant formula is τ = RC, where τ is the time constant, R is the resistance value, and C is the capacitance value. A preset voltage threshold is, for example, 63.2% of the power supply signal VCC, because the voltage rises exponentially during the charging process of capacitor CX, and the time it takes to reach 63.2% of the power supply signal VCC is directly related to the time constant.

[0122] Understandably, in other detection processes, the voltage of pin A3 and pin D13 of the microcontroller U1 can be read separately and compared. When the two voltages are the same, it indicates that the capacitor CX has finished charging. Then, the time required for the charging to be completed can be read, and the capacitance value can be calculated.

[0123] Figure 12 A schematic diagram of the structure of a communication module provided in an embodiment of this utility model is shown below. Figure 12 Based on the above embodiments, optionally, the communication module 80 includes a Bluetooth communication unit U6, and the transmission end of the Bluetooth communication unit U6 is connected to the main control module 10.

[0124] Specifically, the transmission terminals of the Bluetooth communication unit U6 include a first transmission terminal TXD1 and a second transmission terminal RXD1. The first transmission terminal TXD1 of the Bluetooth communication unit U6 is connected to the RXD pin of the microcontroller U1, and the second transmission terminal RXD1 of the Bluetooth communication unit U6 is connected to the TXD pin of the microcontroller U1. The power supply terminal VCC4 of the Bluetooth communication unit U6 is connected to the power signal VCC, for example, it can be connected to the VIN pin of the microcontroller U1. The ground terminal GND5 of the Bluetooth communication unit U6 is grounded, for example, it can be connected to the GND pin of the microcontroller U1.

[0125] Figure 13 This is a schematic diagram of the structure of a display module provided in an embodiment of the present utility model. See also: Figure 13 Based on the above embodiments, optionally, the display module 70 includes a liquid crystal display screen, such as an LCD1602 liquid crystal display screen. The liquid crystal display screen is used to display the voltage, current, power, temperature and humidity, communication status, and whether the chip, diode, transistor, and switching transistor are intact at the target detection point.

[0126] Pins P1, P5, and P16 of the LCD screen are all grounded, for example, they can all be connected to pin GND of microcontroller U1. Pin P3 of the LCD screen is grounded through resistor R6, for example, it can be connected to pin GND of microcontroller U1. Resistor R6 is used to adjust the contrast of the LCD screen. Pin P2 of the LCD screen is connected to the power signal VCC, for example, it can be connected to pin VIN of microcontroller U1. Pin P4 of the LCD screen is connected to pin D6 of microcontroller U1. Pin P6 of the LCD screen is connected to pin D7 of microcontroller U1. Pins P4, P5, and P6 of the LCD screen are used to control register selection, read / write operations, and enable for data transmission. Pin P11 of the LCD screen is connected to pin D9 of microcontroller U1; pin P12 of the LCD screen is connected to pin D10 of microcontroller U1; pin P13 of the LCD screen is connected to pin D11 of microcontroller U1; pin P14 of the LCD screen is connected to pin D12 of microcontroller U1; pins P11-P14 of the LCD screen select the high four bits of the data bus for data exchange. Pin P15 of the LCD screen is connected to the 5V pin of microcontroller U1; the remaining pins of the LCD screen are left floating.

[0127] Figure 14 A schematic diagram of a power module provided in an embodiment of this utility model is shown below. Figure 14 Based on the above embodiments, optionally, the power module 91 includes a device power supply 92, a second switch S2, and a third switch S3. The second switch S2 and the third switch S3 can be configured for interlocking control.

[0128] In this configuration, power module 91 can be connected only to pins VIN and GND of microcontroller U1, with other functional modules drawing power from the power supply of microcontroller U1. Alternatively, power module 91 can be connected to the power supply and ground terminals of each functional module, with each functional module drawing power from device power supply 92. For example, device power supply 92 is a 5V device power supply.

[0129] In summary, the beneficial effects of the circuit board repair device provided by this utility model are as follows:

[0130] 1. It can overcome the limitations of observation and multimeter testing methods. By testing each target test point, it can accurately identify some minor defects or hidden faults.

[0131] 2. By setting up multiple functional modules, the accuracy and reliability of equipment maintenance can be improved.

[0132] 3. By setting up corresponding functional areas for each functional module in the circuit board repair device, each functional area performs its corresponding repair function. This makes the functional areas clearly defined, the operation convenient, and effectively solves the problem of misjudgment or omission during the repair process due to the lack of skills and experience of the staff.

[0133] 4. Each functional area directly corresponds to the testing requirements of the circuit under test, resulting in clear division of labor and high measurement accuracy. Independent operation of each functional area not only improves maintenance efficiency and reduces time costs, but also addresses the challenges of time-consuming and labor-intensive maintenance caused by complex circuit board structures and diverse fault types.

[0134] 5. It has achieved a unified standard for circuit board repair and simplified the complexity of multi-instrument collaborative work.

[0135] 6. By setting up a protection circuit, secondary damage to the circuit board under test can be effectively avoided, eliminating the problems of difficult repair and potential safety hazards caused by damage to the circuit board under test.

[0136] 7. By setting up a chip detection module, it can meet the functional repair needs of diodes, transistors, switching transistors, chips and other components on the circuit board to be tested. By testing the electrical characteristics (such as current, voltage and resistance) of the above components, it can detect the correctness of the circuit connection and whether the electrical parameters meet the specified range, which greatly improves the repair efficiency and accuracy of the target key point area.

[0137] 8. By setting up a capacitor detection circuit, it can be used specifically for the repair of various types of capacitors.

[0138] 9. A current detection unit is incorporated, offering two modes to adapt to different scenarios. First, an AC / DC sensor is used, connected in series in the circuit for easily disassembled circuit boards during repair. Second, a Hall effect current sensor is used, with a first coil wound based on the principle of electromagnetic induction, to collect the induced current, voltage, and frequency changes at both ends of the first coil. The signals are then amplified and processed for testing and repairing circuit boards that are difficult to disassemble. Both methods transmit the data to the microcontroller U1 for further processing and calculation, enhancing the device's practicality.

[0139] 10. By setting up a waveform display unit, the voltage of the target detection point on the circuit board to be tested will be collected and transmitted to the main control module. The voltage waveform of the target detection point will be displayed according to the control of the main control module. This visualization display can more intuitively reflect the working status of the target detection point.

[0140] 11. By setting up a communication module, the collected data can be remotely transmitted to a mobile device, allowing users to understand the various parameters of the circuit board more intuitively.

[0141] In summary, the circuit board repair device provided by this utility model includes a dedicated protection circuit to prevent secondary damage to the circuit board under test. It can collect the temperature and humidity of the circuit board's operating environment in real time, and collect and detect waveforms, voltages, currents, and power at target detection points in real time. It can also perform functional testing on electronic components such as chips and diodes. The communication module transmits the data displayed by the display module to a mobile device, enabling rapid fault location, reducing repair time, and improving repair efficiency. Furthermore, it can accurately test various parts of the circuit board under test, including component values ​​and circuit continuity, ensuring repair accuracy. It can also discover potential hidden dangers in the circuit board under test to improve repair quality. This circuit board repair device enhances the safety, convenience, accuracy, and efficiency of testing.

[0142] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0143] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A circuit board repair device, characterized in that, include: Main control module; An electrical performance testing module, connected to the main control module, is used to detect the voltage and current of the target testing point on the circuit board under test and transmit them to the main control module, as well as to display the voltage waveform of the target testing point; An input acquisition module is connected to the input terminals of the main control module and the circuit board under test, respectively, and is used to acquire the electrical parameters of the input terminals of the circuit board under test and transmit them to the main control module; wherein, the electrical parameters include input current, input current frequency, input voltage, input voltage frequency, and input power; A temperature and humidity detection module, connected to the main control module, is used to detect the temperature and humidity of the working environment where the circuit board under test is located and transmit the data to the main control module.

2. The circuit board repair device according to claim 1, characterized in that, The input terminals of the circuit board under test include: a first input terminal and a second input terminal; the input acquisition module is connected between the first input terminal and the second input terminal; The circuit board repair device further includes: a protection circuit; the protection circuit includes: The first light-emitting unit is connected between the first power supply terminal of the protection circuit and the first input terminal of the circuit board under test. The second power supply terminal of the protection circuit is connected to the second input terminal of the circuit board under test. The first power supply terminal of the protection circuit is connected to a power signal, and the second power supply terminal of the protection circuit is grounded. The first switch is connected in parallel to both ends of the first light-emitting unit.

3. The circuit board repair device according to claim 2, characterized in that, The input acquisition module and the protection circuit are integrated on the same circuit board.

4. The circuit board repair device according to claim 1, characterized in that, The electrical performance testing module includes: A current detection unit, connected to the main control module, is used to detect the current at the target detection point on the circuit board to be tested and transmit it to the main control module. A voltage detection unit, connected to the main control module, is used to detect the voltage at the target detection point on the circuit board to be tested and transmit it to the main control module. The waveform display unit is connected to the main control module and is used to acquire the voltage of the target detection point on the circuit board to be tested and transmit it to the main control module, and display the voltage waveform of the target detection point according to the control of the main control module.

5. The circuit board repair device according to claim 4, characterized in that, The waveform display unit includes: a first detection terminal, a second detection terminal, a signal amplification unit, a status indication unit, a mode switching unit, and a first display unit; The first detection terminal is connected to the target detection point, and the second detection terminal is grounded; The signal amplification unit is connected between the first detection terminal and the main control module; The status indication unit is connected between the main control module and ground; The mode switching unit is connected to the main control module and is used to control the display mode of the first display unit; The first display unit is connected to the main control module and is used to display the voltage waveform of the target detection point.

6. The circuit board repair device according to claim 5, characterized in that, The signal amplification unit includes: a first potentiometer and a first resistor, a first end of the first resistor is connected to the first detection terminal, a second end of the first resistor is connected to the first connection terminal of the first potentiometer and to the sliding terminal of the first potentiometer, the sliding terminal of the first potentiometer is connected to the main control module, and the second connection terminal of the first potentiometer is connected to the main control module. The status indication unit includes: a light-emitting diode and a second resistor, wherein the first terminal of the light-emitting diode is grounded, the second terminal of the light-emitting diode is connected to the first terminal of the second resistor, and the second terminal of the second resistor is connected to the main control module; The mode switching unit includes: multiple switching sub-units; each switching sub-unit includes: a button and a third resistor; For any switching subunit, the first end of the third resistor is connected to the main control module, the second end of the third resistor is connected to the first end of the button and serves as the output end of the switching subunit, which is connected to the main control module, and the second end of the button is grounded; In this configuration, the first end of the third resistor in different switching subunits is connected to the same end of the main control module, and the output ends of different switching subunits are connected to different ends of the main control module.

7. The circuit board repair device according to claim 4, characterized in that, The current detection unit includes: an AC / DC sensor; The AC / DC sensor is connected in series with the target detection point in the circuit where the target detection point is located, and the output terminal of the AC / DC sensor is connected to the main control module; And / or, The current detection unit includes: a Hall current sensor; The Hall current sensor includes a first coil, the line where the target detection point is located passes through the center hole of the first coil, and the output terminal of the Hall current sensor is connected to the main control module; And / or, The voltage detection unit includes: a voltage sensor; The output terminal of the voltage sensor is connected to the main control module, and the detection terminal of the voltage sensor is connected to the target detection point.

8. The circuit board repair device according to claim 1, characterized in that, The temperature and humidity detection module includes a temperature and humidity sensor and a fourth resistor; The temperature and humidity sensor is placed in the working environment of the circuit board under test. The output terminal of the temperature and humidity sensor is connected to the main control module and to the first terminal of the fourth resistor. The second terminal of the fourth resistor is connected to the power signal.

9. The circuit board repair device according to claim 1, characterized in that, Also includes: Capacitance detection circuit; The capacitance detection circuit includes a second potentiometer and a fifth resistor. The first connection terminal of the second potentiometer is connected to a power signal. The sliding terminal of the second potentiometer is connected to the second connection terminal of the second potentiometer and to the first terminal of the fifth resistor and the main control module. The second terminal of the fifth resistor is connected to the main control module. The capacitor on the circuit board to be tested is connected between the second terminal of the second potentiometer and the ground terminal of the capacitor detection circuit.

10. The circuit board repair device according to claim 1, characterized in that, Also includes: The display module is connected to the main control module; And / or, a communication module connected to the main control module; the communication module includes a Bluetooth communication unit, the transmission end of which is connected to the main control module; And / or, a power module, connected to the main control module; And / or, a chip detection module, connected to the main control module, the chip detection module being used to detect whether the chip devices on the circuit board to be tested are short-circuited; And / or, the main control module includes: a microcontroller.

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