PCB testing system

Abstract

The invention, which relates to the technical field of PCB testing, provides a PCB testing system comprising a relay module, a power supply module, a test calibration module and a control panel. One end of the power supply module is used for being connected with a power grid, the other end of the power supply module is electrically connected with a power supply interface of the control panel, and the power supply interface is used for being electrically connected with a power supply access terminal of a PCB to be tested; the relay module comprises a first switch unit, the first switch unit comprises a plurality of switches, the test calibration module is respectively connected with the plurality of detection interfaces of the control panel through the plurality of switches in the first switch unit, the plurality of switches are correspondingly connected with the plurality of detection interfaces, and the detection interfaces are used for being electrically connected with detection points on a PCB to be tested. The compatibility of the PCB test system is greatly improved, and the interface of the test calibration module is expanded, so that the expansibility of the test system is enhanced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of PCB board testing, and more particularly, to a PCB board testing system. Background Art

[0002] Before the micro-inverter PCB board is put into use, it needs to be tested and calibrated to ensure the integrity of the product function. Due to the particularity of the micro-inverter, if the PCB board is directly potted and assembled into a complete machine after production, it is difficult to remove the abnormal PCB board during the testing and calibration at the complete machine end, which is not conducive to repair, and often causes waste of labor and spare parts. Therefore, it is required to perform testing and calibration during the PCB board assembly process.

[0003] Since different PCB boards have different structures, different testing systems need to be designed for different types of PCB boards, and the expandability and compatibility of a single testing system are poor. Summary of the Utility Model

[0004] The problem to be solved by the present disclosure is that the expandability and compatibility of the existing testing system are poor.

[0005] To solve the above problems, the present disclosure provides a PCB board testing system, including a relay module, a power supply module, a test and calibration module, and a control panel;

[0006] One end of the power supply module is used to be connected to the power grid, the other end of the power supply module is electrically connected to the power supply interface of the control panel, and the power supply interface is used to be electrically connected to the power access terminal of the PCB board to be tested;

[0007] The relay module includes a first switch unit, the first switch unit includes a plurality of switches, the test and calibration module is respectively connected to a plurality of detection interfaces of the control panel through the plurality of switches in the first switch unit, the plurality of switches are correspondingly connected to the plurality of detection interfaces, and the detection interfaces are used to be electrically connected to the detection points on the PCB board to be tested.

[0008] Optionally, the test and calibration module includes a test instrument, and the test ends of the test instrument are respectively connected to the plurality of detection interfaces of the control panel through the plurality of switches.

[0009] Optionally, the test and calibration module includes a current calibration power supply. Two of the switches form a first switch group, and the detection interface is a current calibration interface. The input end of the current calibration power supply is used to be connected to the power grid. The output end of the current calibration power supply is electrically connected to multiple pairs of current calibration interfaces of the control panel through two of the switches in multiple first switch groups. Multiple first switch groups are connected to multiple pairs of current calibration interfaces in a one-to-one correspondence. The current calibration interface is used to be electrically connected to the circuit to be calibrated of the PCB board to be tested.

[0010] Optionally, the test and calibration module includes a test voltage source. Two of the switches form a second switch group, and the detection interface is a voltage interface. The input end of the test voltage source is used to be connected to the power grid. The output end of the test voltage source is electrically connected to multiple pairs of the voltage interfaces of the control panel through two of the switches in multiple second switch groups. Multiple second switch groups are connected to multiple pairs of voltage interfaces in a one-to-one correspondence. The voltage interface is used to be electrically connected to the power supply access terminal of the PCB board to be tested.

[0011] Optionally, the test and calibration module includes an auxiliary power supply. The detection interface is an auxiliary power supply interface. The input end of the auxiliary power supply is used to be connected to the power grid. The output end of the auxiliary power supply is electrically connected to multiple pairs of the auxiliary power supply interfaces of the control panel through multiple switches. Multiple switches are connected to multiple pairs of auxiliary power supply interfaces in a one-to-one correspondence. The auxiliary power supply interface is used to be electrically connected to the power supply access terminal of the PCB board to be tested.

[0012] Optionally, the PCB board test system further includes a voltage calibration power supply. The input end of the voltage calibration power supply is used to be connected to the power grid. The output end of the voltage calibration power supply is electrically connected to a pair of voltage calibration interfaces of the control panel. The voltage calibration interface is used to be electrically connected to the circuit to be calibrated of the PCB board to be tested.

[0013] Optionally, the relay module further includes a second switch unit. The second switch unit includes multiple switches. Multiple short-circuit interface groups are arranged on the control panel. Each short-circuit interface group includes two short-circuit interfaces. Two short-circuit interfaces in each short-circuit interface group are electrically connected through one of the switches in the second switch unit. Two short-circuit interfaces in each short-circuit interface group are used to be electrically connected to any two output terminals of the PCB board to be tested.

[0014] Optionally, the PCB board testing system further includes a startup circuit, which includes an air switch, a contactor, a startup switch, and an emergency stop switch. One end of the air switch is used to connect to the power grid, the other end of the air switch is connected to one end of the contactor, the other end of the contactor is electrically connected to the test and calibration module, one end of the startup switch is connected to one end of the emergency stop switch, the other end of the emergency stop switch is connected to one end of the control coil of the contactor, and the other ends of the startup switch and the control coil are respectively used to be electrically connected to the live wire and the neutral wire of the power grid.

[0015] Optionally, the PCB board testing system further includes a host computer, a communication module, and a control module;

[0016] The host computer is electrically connected to the communication module, the communication module is electrically connected to the control module, and the communication module is also used to be electrically connected to the PCB board to be tested;

[0017] The power supply module includes a first power transformer and a second power transformer. The input ends of the first power transformer and the second power transformer are respectively used to connect to the power grid. The output end of the first power transformer is electrically connected to the power supply interface of the control panel, and the output end of the second power transformer is electrically connected to the control module.

[0018] Optionally, the relay module further includes a third switch unit, and the third switch unit includes a plurality of switches;

[0019] The communication module includes a first communication module and a second communication module. The control module includes a PLC. One end of the first communication module and one end of the second communication module are both connected to the host computer. The other end of the second communication module is connected to the information receiving terminal of the control module. The other end of the first communication module is respectively connected to a plurality of communication interfaces of the control panel through the plurality of switches in the third switch unit. The communication interfaces are used to be electrically connected to the communication terminals of the PCB board to be tested.

[0020] Compared with the prior art, the present disclosure has the following beneficial effects:

[0021] A PCB board testing system provided by the present disclosure. The power supply module converts the grid voltage into the voltage required by the PCB board to be tested and supplies it to the PCB board to be tested. The PCB board to be tested starts to work and execute various functions. At this time, multiple switches in the first switch unit under the relay module are switched on and off, so that the test and calibration module detects the PCB board to be tested connected to the detection interface of the control panel. Since different types of PCB boards or different detection points of the PCB board can be connected to the detection interface of the control panel, and different switches are switched on and off, correspondingly, the test and calibration module can be controlled to communicate with different detection interfaces, so that the circuit information at different types of PCB boards or different detection points on the PCB board can be continuously tested and inspected, greatly improving the compatibility of the PCB board testing system; the test and calibration module is connected to multiple detection interfaces of the control panel through multiple switches, expanding the interfaces of the test and calibration module, and further enhancing the expandability of the test system. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a PCB board testing system;

[0023] Figure 2 It is a schematic circuit diagram of the power supply module;

[0024] Figure 3 It is a schematic wiring diagram of the multimeter;

[0025] Figure 4 It is a schematic interface diagram of the operation panel;

[0026] Figure 5 It is a schematic wiring diagram of the current calibration power supply;

[0027] Figure 6 It is a schematic diagram of the power-on circuit of some devices of a PCB board testing system;

[0028] Figure 7 It is a schematic wiring diagram of the output terminal of the voltage calibration power supply;

[0029] Figure 8 It is a schematic wiring diagram of the test voltage source;

[0030] Figure 9 It is a schematic wiring diagram of the auxiliary power supply;

[0031] Figure 10 It is a schematic diagram of the short-circuit circuit of the digital output port

[0032] Figure 11 It is a schematic wiring diagram of the PLC terminal;

[0033] Figure 12 For Figure 11 It is a schematic wiring diagram of the internal intermediate relay;

[0034] Figure 13 It is a wiring schematic diagram of communication module 1. Specific embodiments

[0035] To make the above objects, features, and advantages of the present disclosure more obvious and understandable, the following will describe in detail the specific embodiments of the present disclosure with reference to the accompanying drawings.

[0036] It should be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of the present disclosure are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described here can be implemented in an order other than those illustrated or described here.

[0037] In the description of this specification, the descriptions referring to terms such as "embodiment", "one embodiment", and "one implementation manner" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or implementation manner are included in at least one embodiment or implementation manner of the present disclosure. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or implementation manner. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or implementation manners in a suitable manner.

[0038] As Figure 1 shown, a PCB board test system is provided in the present disclosure, including a relay module 7, a power supply module 5, a test and calibration module 6, and a control panel;

[0039] One end of the power supply module 5 is used to be connected to the power grid, and the other end of the power supply module 5 is electrically connected to the power supply interface of the control panel, and the power supply interface is used to be electrically connected to the power access terminal of the PCB board 8 to be tested;

[0040] The relay module 7 includes a first switch unit, the first switch unit includes a plurality of switches, the test and calibration module 6 is respectively connected to a plurality of detection interfaces of the control panel through the plurality of switches in the first switch unit, the plurality of switches are correspondingly connected to the plurality of detection interfaces, and the detection interfaces are used to be electrically connected to the detection points on the PCB board 8 to be tested.

[0041] Specifically, as Figure 2 shown, the power supply module 5 is connected to the live wire L1 and the neutral wire N1 in the power grid. The power supply module 5 can select a power supply of 220V to 60V to supply power to the PCB board. The test and calibration module 6 can include a test instrument, and the test instrument can be a multimeter, which is used to test the voltage, current, etc. of the circuit to be tested. The model of the multimeter can be Figure 3The shown GDM-8261A, the test terminals of the multimeter are respectively connected to multiple detection interfaces on the control panel through multiple switches in the first switch unit, such as Figure 4 . The test and calibration module 6 can also include a current calibration power supply, such as Figure 5 . The model of the current calibration power supply can be selected as IT6592A. The input end of the current calibration power supply is connected to the power grid, converting the grid current into a stable required current. Combining Figure 4 and Figure 5 , this current is respectively delivered to the P3 socket and P4 socket of the control panel through the switch. Among them, the interfaces with corresponding numbers in the P3 socket and P4 socket form a pair of current calibration interfaces. Figure 3 and Figure 5 . The multiple switches in can be manual switches or controllable automatic switches (such as relays, IGBTs, contactors, etc.). As long as they can realize the on-off function of the circuit, they can be used as switches. Therefore, different PCB boards or different detection points of the PCB board can be connected to the detection interfaces on the control panel. By controlling the on-off of the switches, the multimeter can be correspondingly controlled to communicate with different detection interfaces, so that the circuit information at different types of PCB boards or different detection points on the PCB board can be continuously tested.

[0042] In this embodiment, the power supply module 5 converts the grid voltage into the voltage required by the PCB board 8 to be tested and supplies it to the PCB board 8 to be tested. The PCB board 8 to be tested works and starts to execute various functions. At this time, the multiple switches in the first switch unit are switched on and off, so that the test and calibration module 6 detects the PCB board 8 to be tested connected to the detection interface of the control panel. Since different types of PCB boards or different detection points of the PCB board can be connected to the detection interfaces on the control panel, and different switches are switched on and off, the test and calibration module 6 can be correspondingly controlled to communicate with different detection interfaces, so that the circuit information at different types of PCB boards or different detection points on the PCB board can be continuously tested and inspected, greatly improving the compatibility of the PCB board test system; the test and calibration module 6 is connected to multiple detection interfaces of the control panel through multiple switches, expanding the interfaces of the test and calibration module 6, and further enhancing the expandability of the test system.

[0043] Optionally, as Figure 3 shown, the test and calibration module includes a test instrument, and the test terminals of the test instrument are respectively connected to the multiple detection interfaces of the control panel through the multiple switches.

[0044] Specifically, the test instrument can be a multimeter, which is used to test the voltage, current, etc. of the circuit to be tested. The model of the multimeter can be Figure 3The shown GDM-8261A, the test terminals of the multimeter are respectively connected to multiple detection interfaces on the control panel through multiple switches in the first switch unit. Since there are two test terminals of the multimeter, the detection interfaces on the control panel can also be grouped in pairs of two. Each group of detection interfaces is connected to the test terminal of the test calibration module 6 through different switches. For example, Figure 3 and Figure 4 shown, the multimeter is connected to DB1-1 to DB1-16, DB1-20 to DB1-35 in the DB1 plug, DB2-9 to DB2-12 and DB2-28 to DB2-31 in the DB2 plug on the control panel through switches. For example, Figure 3 in, the test terminal of the multimeter is connected to DB1-1 and DB1-20 through KA22. Similarly, it can also be connected to more plugs on the control panel through more switches such as KA23, KA24,..., KA44 and KA45.

[0045] Optionally, as Figure 5 shown, the test calibration module 6 includes a current calibration power supply. Two of the switches form a first switch group. As Figure 6 shown, the input end of the current calibration power supply is used to be connected to the power grid. The detection interface is a current calibration interface. The output end of the current calibration power supply is electrically connected to multiple pairs of current calibration interfaces on the control panel through two of the switches in multiple first switch groups. Multiple first switch groups are connected to multiple pairs of current calibration interfaces in one-to-one correspondence. The current calibration interface is used to be connected to the circuit to be calibrated on the PCB board 8 to be tested.

[0046] Specifically, as Figure 5 shown, the above switches can be manual switches or controllable automatic switches (such as relays, IGBTs, contactors, etc.). As long as they can realize the on-off function of the circuit, they can be used as switches. The model of the current calibration power supply can be IT6592A. The input end of the current calibration power supply is connected to the power grid, converting the grid current into a stable required current, and sending this current to the P3 socket and P4 socket on the control panel through multiple first switch groups respectively. The interfaces with corresponding numbers in the P3 socket and P4 socket form a pair of current calibration interfaces. For example, Figure 5As shown, for example, P3-1 and P4-1, P3-2 and P4-2, P3-3 and P4-3,......, P3-10 and P4-10, etc.; two of the said switches form a first switch group, which can be KB13 and KB14, KB15 and KB16, KB17 and KB18,......, KB31 and KB32, etc.; the above-mentioned multiple pairs of current calibration interfaces correspond to multiple first switch groups one by one. For example, the first switch group composed of KB13 and KB14 corresponds to a pair of current calibration interfaces composed of P3-1 and P4-1. Both ends of the current calibration power supply are respectively connected to two current calibration interfaces (P3-1 and P4-1) in the corresponding pair of current calibration interfaces through two switches (KB13 and KB14) in a first switch group. By closing two switches in a switch group, the output end of the current calibration power supply is controlled to be connected to the corresponding pair of current calibration interfaces, and the input end of the circuit to be calibrated of the PCB board 8 to be tested is connected to a pair of current calibration interfaces, and the magnitude of the current in the circuit to be calibrated is detected. By observing the magnitude of the current, the component parameters in the circuit to be calibrated are changed, so that the current in the circuit to be calibrated reaches the ideal value. The current calibration power supply can output a stable and known magnitude of current. For example, the 25A current source outputs a current of 25A, which is convenient for calibrating the current of the PCB board 8 to be tested. By setting multiple calibration branches, the compatibility and expandability of the test system are increased.

[0047] Optionally, as Figure 6 and Figure 7 shown, the PCB board test system further includes a voltage calibration power supply. The input end of the voltage calibration power supply is used to be connected to the power grid, and the output end of the voltage calibration power supply is electrically connected to a pair of voltage calibration interfaces of the control panel. The voltage calibration interfaces are used to be electrically connected to the circuit to be calibrated of the PCB board 8 to be tested.

[0048] Specifically, as Figure 6 shown, the model of the voltage calibration power supply can be IT6833A. Its input end is connected to the power grid, and the output end is electrically connected to a pair of voltage calibration interfaces (PV+ and PV-) of the control panel. The voltage calibration interfaces can be electrically connected to the circuit to be calibrated of the PCB board 8 to be tested. By observing the change of the voltage in the circuit to be calibrated, the component parameters of the circuit to be calibrated are calibrated, so that the operating voltage of the circuit to be calibrated is kept consistent with the ideal voltage. The voltage calibration power supply can output a stable voltage. For example, the 72V voltage source can stably output 72V voltage, which is beneficial to improving the accuracy of calibration. Moreover, by integrating the voltage calibration power supply into the control panel of the test system, only the wiring connected to the PCB board 8 to be tested needs to be plugged and unplugged each time, reducing the preparation workload of the test and improving the test efficiency and calibration efficiency.

[0049] Optionally, as Figure 8As shown, the test and calibration module 6 includes a test voltage source. Two of the switches form a second switch group. The detection interface is a voltage interface. The input end of the test voltage source is used to be connected to the power grid. The output end of the test voltage source is electrically connected to multiple pairs of voltage interfaces on the control panel through two of the switches in multiple second switch groups. Multiple second switch groups are connected to multiple pairs of voltage interfaces in one-to-one correspondence. The voltage interfaces are used to be electrically connected to the power access terminals of the PCB under test 8.

[0050] Specifically, the above switches can be manual switches or controllable automatic switches (such as relays, IGBTs, contactors, etc.), as long as they can achieve the on-off function of the circuit, they can be used as switches. As Figure 8 shown, the model of the test voltage source can be selected as IT6517D. This type of power supply can provide a large voltage of 300V. Two of the switches form a second switch group, which can be KB1 and KB2, KB3 and KB4, KB5 and KB6,......, KB11 and KB12, etc.; the test voltage source is electrically connected to multiple pairs of voltage interfaces on the control panel through different switch groups. Multiple pairs of voltage interfaces can be P2-1 and P2-11, P2-2 and P2-12, P2-3 and P2-13,......, P2-6 and P2-16, etc.; the above multiple pairs of voltage interfaces correspond to multiple second switch groups one by one. For example, the second switch group composed of KB1 and KB2 corresponds to a pair of voltage interfaces composed of P2-1 and P2-11. Both ends of the test voltage source are respectively connected to two voltage interfaces (P2-1 and P2-11) in the corresponding pair of voltage interfaces through two switches (KB1 and KB2) in a second switch group. By controlling the closing of a switch group, the connection between the test voltage source and the corresponding voltage interface can be controlled. If the power access terminal of the PCB under test 8 is connected to this voltage interface, a large voltage can be input to the PCB under test 8, changing the working environment or calibration environment of the PCB under test 8, etc., testing the working condition of the PCB under test 8 under extreme voltage or harsh voltage environment, and conducting a more comprehensive test on the PCB under test 8 to ensure the ex-factory quality of the PCB under test 8.

[0051] Optionally, as Figure 9 shown, the test and calibration module 6 includes an auxiliary power supply. The detection interface is an auxiliary power supply interface. The input end of the auxiliary power supply is used to be connected to the power grid. The output end of the auxiliary power supply is electrically connected to multiple pairs of auxiliary power supply interfaces on the control panel through multiple switches. Multiple switches are connected to multiple pairs of auxiliary power supply interfaces in one-to-one correspondence. The auxiliary power supply interfaces are used to be electrically connected to the power access terminals of the PCB under test 8.

[0052] Specifically, the above switch can be a manual switch or a controllable automatic switch (such as a relay, IGBT, contactor, etc.), as long as it can achieve the function of opening and closing the circuit, it can be used as a switch. For example, Figure 9 , the model of the auxiliary power supply can be selected as IT6862A. As Figure 6 shown, one end of the auxiliary power supply is connected to the power grid, and the other end is electrically connected to multiple pairs of auxiliary power supply interfaces of the control panel through multiple switches. The multiple switches can be KA46, KA47, KA50, KA51, KA52, KA53, etc.; the multiple pairs of auxiliary power supply interfaces can be DB2-1 and DB2-20, DB2-2 and DB2-21, DB2-3 and DB2-22,......, DB2-6 and DB2-25, etc.; the above multiple pairs of auxiliary power supply interfaces correspond to the multiple switches one by one. For example, KA46 corresponds to a pair of auxiliary power supply interfaces composed of DB2-1 and DB2-20. The two ends of the auxiliary power supply are respectively connected to the two auxiliary power supply interfaces (DB2-1 and DB2-20) in the corresponding pair of auxiliary power supply interfaces through the switch KA46. By controlling the switch to close, the auxiliary power supply is connected to the power access terminal of the PCB under test 8 connected to the auxiliary power supply interface, and the PCB under test 8 is supplied with auxiliary power, which can increase the voltage value input to the PCB under test 8 and can also supply power to other functional modules of the PCB under test 8 separately, increasing the flexibility and diversity of power supply.

[0053] Optionally, as Figure 10 shown, the relay module 7 further includes a second switch unit. The second switch unit includes multiple switches. A plurality of short-circuit interface groups are arranged on the control panel. Each short-circuit interface group includes two short-circuit interfaces. The two short-circuit interfaces in each short-circuit interface group are electrically connected through one of the switches in the second switch unit. The two short-circuit interfaces in each short-circuit interface group are used to be electrically connected to any two output terminals of the PCB under test 8.

[0054] Specifically, the switch in the above second switch unit can be a manual switch or a controllable automatic switch (such as a relay, IGBT, contactor, etc.), as long as it can achieve the function of opening and closing the circuit, it can be used as a switch. For example, Figure 10, the multiple switches in the second switch unit can be KA54, KA55, KA56, KA57, etc., and the multiple short - circuit interface groups can be DB2 - 13 and DB2 - 32, DB2 - 14 and DB2 - 33, DB2 - 15 and DB2 - 34, and DB2 - 16 and DB2 - 35. Close one of the switches to directly connect a group of short - circuit interfaces. Then connect any two output terminals of the PCB under test 8 to two short - circuit interfaces in this group, which is equivalent to directly short - circuiting the two output terminals of the PCB under test 8. Observe whether the PCB under test 8 gives an alarm or whether the value changes as expected, etc., so as to realize the short - circuit test of the output terminals.

[0055] Optionally, as Figure 6 shown, the PCB board test system further includes a start - up circuit. The start - up circuit includes an air switch, a contactor, a start - up switch, and an emergency stop switch. One end of the air switch is used to connect to the power grid, the other end of the air switch is connected to one end of the contactor, the other end of the contactor is electrically connected to the test and calibration module 6, one end of the start - up switch is connected to one end of the emergency stop switch, the other end of the emergency stop switch is connected to one end of the control coil of the contactor, and the other end of the start - up switch and the other end of the control coil are respectively used to be electrically connected to the live wire and the neutral wire of the power grid.

[0056] Specifically, one end of the air switch Q1 is connected to the power grid (live wire L and neutral wire N), the other end of the air switch Q1 is connected to one end of the contactor KM1, the other end of the contactor KM1 is electrically connected to the test and calibration module 6 (GDM - 8261A), and can also be connected to the current calibration power supply IT6592A, the voltage calibration power supply IT6833A, the test voltage source IT6517D, and the auxiliary power supply IT6862A. One end of the start - up switch H1 is connected to one end of the emergency stop switch H3, the other end of the emergency stop switch H3 is connected to one end of the control coil of the contactor KM1. The emergency stop button is in a normally - closed state. The other end of the start - up switch H1 and the other end of the control coil are respectively used to be electrically connected to the live wire L and the neutral wire N of the power grid. After closing the air switch and the start - up switch H1, the contactor is energized and closed, and the H1 button lights up, and the entire test system is powered on. When an emergency occurs, press H3, the contactor loses power and disconnects, and the start - up circuit can be immediately powered off, realizing fast and safe power - off and ensuring the safety of the production and debugging process.

[0057] Optionally, as Figure 1 shown, the PCB board test system further includes a host computer 2, a communication module 3, and a control module 4;

[0058] The host computer 2 is electrically connected to the communication module 3, the communication module 3 is electrically connected to the control module 4, and the communication module 3 is also used to be electrically connected to the PCB board 8 to be tested.

[0059] As Figure 2 shown, the power supply module 5 includes a first power transformer and a second power transformer. The input end of the first power transformer is used to be connected to the power grid, the output end of the first power transformer is electrically connected to the power supply interface of the control panel, the input end of the second power transformer is used to be connected to the power grid, and the output end of the second power transformer is electrically connected to the control module 4.

[0060] Specifically, the first power transformer can be Figure 2 the 60V power supply in Figure 4 , that is, the power supply that converts 220V to 60V. Combining Figure 2 , the 60V power supply is connected to the power supply interfaces FP+ and FP- in the P1 plug of the control panel to supply normal power to the PCB board 8 to be tested. The second power transformer can be Figure 2 , the 24V power supply in Figure 11 , that is, the power supply that converts 220V to 24V. As Figure 11 shown, the control module 4 can be a PLC, or other control chips or control devices such as a single-chip microcomputer can be selected. Combining Figure 12 , the 24V power supply provides power for the PLC. If the switch is a relay, it also provides electrical energy for the control coil of the relay.

[0061] As Figure 1 shown, the host computer 2 can be an industrial computer. The industrial computer can perform data interaction with the cloud server 1. The cloud server can form a test report for each PCB board, and the test records are traceable for facilitating the investigation of abnormal product data in the later stage. The communication module 3 is used to process and convert the instructions issued by the host computer 2 into data or signals that can be recognized by the control module 4 and the PCB board 8 to be tested. For example, the communication module 3 is an RS232 interface and is an RS485 interface to convert the communication method. When the interface is converted, the data passing through is processed and converted, which is a commonly used communication method conversion method in this field.

[0062] Combining Figure 11 and Figure 12 , the PLC is connected to the power grid and is powered on and standby. When receiving the instructions issued by the host computer 2, it starts to work and controls the on and off of the switch in the relay module 7 connected to the PLC terminal. This is a commonly used existing technology and does not involve the improvement of the method. As Figure 12 is Figure 11Wiring schematic diagram of multiple switches on the left side. The multiple switches can be relays KA2, KA3, KA4...KA20, KA21, KA66, etc. The PLC is connected to the control coils (control terminals) of the multiple switches in the first switch unit. The PLC controls the energization or de - energization of the control coils. Correspondingly, Figure 12 the multiple relays KA in it will close or open. Similarly, Figure 3 when the multiple switches in it are relays KA, they can also be controlled by the PLC. When the upper computer 2 issues an instruction, the communication module 3 processes the instruction into data that can be recognized by the control module 4 and the PCB under test 8, and sends it to the control module 4 and the PCB under test 8. The PCB under test 8 receives the instruction and starts to execute various functions.

[0063] In addition, when the switches in the above - mentioned multiple switch units are automatically controllable switches such as relays, the control module 4 can be electrically connected to the control terminals of the multiple relays in the multiple switch units, so as to realize the automatic control of the switches, reduce the operation time, and improve the efficiency and safety. As Figure 12 shown, multiple intermediate relays can also be set. Each switch group corresponds to an intermediate relay. The control module 4 is electrically connected to the control terminals of the multiple intermediate relays respectively, so as to control the on - off of the intermediate relays. The multiple intermediate relays are respectively connected to the multiple switch groups correspondingly. Each intermediate relay is connected to the control terminals of two switches in a switch group, and then 24V power supply is connected to both ends. That is, the control module 4 first controls the intermediate relay to be energized and closed, and then controls the two switches in the switch group to be energized and closed. For example Figure 5 and Figure 8 in, if two switches are required to be in a group and the two switches in a group need to be opened and closed simultaneously, the above method can be adopted, and a total control is carried out through an intermediate relay to ensure that the two switches in a group are opened and closed synchronously.

[0064] Optionally, Figure 13 as shown, the relay module 7 further includes a third switch unit. The third switch unit includes multiple switches. The control module 4 is electrically connected to the control terminals of the multiple switches in the third switch unit respectively;

[0065] As Figure 2 shown, the communication module 3 includes a first communication module and a second communication module. The control module 4 can be a PLC. One end of the first communication module and one end of the second communication module are both connected to the upper computer 2. As Figure 11 shown, the other end of the second communication module is connected to the information receiving terminal of the control module (such as PLC). As Figure 13As shown, the other end of the first communication module is electrically connected to a plurality of communication interfaces on the control panel through a plurality of switches in the third switch unit, and the communication interfaces are used to be electrically connected to the communication end of the PCB board 8 to be tested.

[0066] Specifically, as Figure 2 shown, the host computer 2, the mainframe, the display, the communication module 1 (the first communication module), and the communication module 2 (the second communication module) are respectively connected to the power grid through transformers and are powered on and standby. As Figure 11 shown, the other end of the second communication module is connected to PLC-485-A and PLC-485-B and is used to send the instructions of the host computer 2 to the PLC. As Figure 13 shown, the third switch unit includes a plurality of switches, which can be KA60 and KA61 respectively. The other end of the first communication module is connected to the communication interfaces DB9-1, DB9-2, DB9-4, and DB9-5 in the DB9 socket on the control panel through a plurality of switches in the third switch unit. The communication interfaces are used to be electrically connected to the communication end of the PCB board 8 to be tested and are used to transmit the instructions of the host computer 2 to the PCB board 8 to be tested. Figure 13 shown, at least two PCB boards 8 to be tested can be pre-connected on the control panel, and the two PCB boards 8 to be tested can be alternately tested to reduce the time wasted in replacing the PCB board.

[0067] The PCB board test system provided by the present disclosure realizes the process integration of the function test and parameter calibration of the PCB board; can test the PCB board in parallel to improve the test efficiency; can accurately and efficiently complete the function test and parameter calibration tasks of the PCB board; has a high digital level, and can be set to execute corresponding test programs for different PCB boards to form a traceable test report, which is convenient for troubleshooting abnormal data in the later stage; has good scalability and can be upgraded and expanded according to needs to meet other test requirements.

[0068] Although the present disclosure is disclosed as above, the present disclosure is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the scope defined by the claims.

Claims

1. A PCB board testing system, characterized in that, It includes a relay module, a power supply module, a test and calibration module, and a control panel; One end of the power supply module is used to connect to the power grid, the other end of the power supply module is electrically connected to the power supply interface of the control panel, and the power supply interface is used to be electrically connected to the power access terminal of the PCB board to be tested; The relay module includes a first switch unit, the first switch unit includes multiple switches, the test and calibration module is respectively connected to multiple detection interfaces of the control panel through the multiple switches in the first switch unit, the multiple switches are correspondingly connected to the multiple detection interfaces, and the detection interfaces are used to be electrically connected to the detection points on the PCB board to be tested.

2. The PCB board testing system according to claim 1, wherein The test and calibration module includes a test instrument, and the test end of the test instrument is respectively connected to the multiple detection interfaces of the control panel through the multiple switches.

3. The PCB board testing system according to claim 1, characterized in that, The test and calibration module includes a current calibration power supply, two of the switches form a first switch group, the detection interface is a current calibration interface, the input end of the current calibration power supply is used to connect to the power grid, and the output end of the current calibration power supply is respectively electrically connected to multiple pairs of the current calibration interfaces of the control panel through two of the switches in the multiple first switch groups, the multiple first switch groups are correspondingly connected to the multiple pairs of current calibration interfaces one by one, and the current calibration interface is used to be electrically connected to the circuit to be calibrated on the PCB board to be tested.

4. The PCB board testing system according to claim 1, characterized in that, The test and calibration module includes a test voltage source, two of the switches form a second switch group, the detection interface is a voltage interface, the input end of the test voltage source is used to connect to the power grid, and the output end of the test voltage source is respectively electrically connected to multiple pairs of the voltage interfaces of the control panel through two of the switches in the multiple second switch groups, the multiple second switch groups are correspondingly connected to the multiple pairs of voltage interfaces one by one, and the voltage interface is used to be electrically connected to the power access terminal of the PCB board to be tested.

5. The PCB board testing system according to claim 1, characterized in that, The test and calibration module includes an auxiliary power supply, the detection interface is an auxiliary power supply interface, the input end of the auxiliary power supply is used to connect to the power grid, and the output end of the auxiliary power supply is respectively electrically connected to multiple pairs of the auxiliary power supply interfaces of the control panel through the multiple switches, the multiple switches are correspondingly connected to the multiple pairs of auxiliary power supply interfaces one by one, and the auxiliary power supply interface is used to be electrically connected to the power access terminal of the PCB board to be tested.

6. The PCB board testing system according to claim 1, wherein, It also includes a voltage calibration power supply, the input end of the voltage calibration power supply is used to connect to the power grid, and the output end of the voltage calibration power supply is electrically connected to a pair of voltage calibration interfaces of the control panel, and the voltage calibration interface is used to be electrically connected to the circuit to be calibrated on the PCB board to be tested.

7. The PCB board testing system according to claim 1, characterized in that, The relay module further includes a second switch unit, the second switch unit includes a plurality of switches, a plurality of short-circuit interface groups are arranged on the control panel, each short-circuit interface group includes two short-circuit interfaces, and the two short-circuit interfaces in each short-circuit interface group are electrically connected through one of the switches in the second switch unit. The two short-circuit interfaces in each short-circuit interface group are used to be electrically connected to any two output terminals of the PCB to be tested.

8. The PCB board testing system according to claim 1, wherein, It further includes a starting circuit, the starting circuit includes an air switch, a contactor, a starting switch and an emergency stop switch. One end of the air switch is used to be connected to the power grid, the other end of the air switch is connected to one end of the contactor, the other end of the contactor is connected to the test and calibration module, one end of the starting switch is connected to one end of the emergency stop switch, the other end of the emergency stop switch is connected to one end of the control coil of the contactor, and the other end of the starting switch and the other end of the control coil are respectively used to be electrically connected to the live wire and the neutral wire of the power grid.

9. The PCB board testing system according to claim 1, wherein, It further includes a host computer, a communication module and a control module; The host computer is electrically connected to the communication module, the communication module is electrically connected to the control module, and the communication module is also used to be electrically connected to the PCB to be tested; The power supply module includes a first power transformer and a second power transformer. The input ends of the first power transformer and the second power transformer are respectively used to be connected to the power grid. The output end of the first power transformer is electrically connected to the power supply interface of the control panel, and the output end of the second power transformer is electrically connected to the control module.

10. The PCB board testing system according to claim 9, wherein The relay module further includes a third switch unit, and the third switch unit includes a plurality of switches; The communication module includes a first communication module and a second communication module. One end of the first communication module and one end of the second communication module are both connected to the host computer. The other end of the second communication module is connected to the information receiving terminal of the control module. The other end of the first communication module is respectively electrically connected to a plurality of communication interfaces of the control panel through a plurality of switches in the third switch unit, and the communication interfaces are used to be electrically connected to the communication end of the PCB to be tested.

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