Resistor voltage intelligent detection device

Abstract

The utility model discloses a resistor voltage intelligent detection device, comprising a test tool used for being connected with a test point of a PCBA board to be tested; and the desk type digital multimeter is used for transmitting the measured resistance value or voltage value to the computer through the serial port to USB data line. The resistor voltage intelligent detection device provided by the utility model solves the problem that the height of an FPGA radiator is improperly controlled, so that the FPGA is damaged or the radiating effect cannot be achieved. Through the design of the cross recess mounting hole of the probe plate, the problem that the probe of a conventional test tool is difficult to position and correct is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCBA board detection, and more specifically to an intelligent resistance voltage detection device. Background Art

[0002] The existing manual resistance voltage testing of PCBA boards has problems such as low testing efficiency, troublesome data statistics, overheating and burning of FPGA chips, and incorrect operation burning out PCBA boards. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an intelligent resistance voltage detection device in order to solve the technical problems existing in the background art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An intelligent resistance voltage detection device, comprising:

[0006] A test fixture, which is used to connect to the measurement points of the PCBA board to be tested;

[0007] A desktop digital multimeter, which is used to transmit the measured resistance value or voltage value to the computer through a serial port to USB data cable.

[0008] In some embodiments, the test fixture includes: a frame, on which a power supply socket, a wiring terminal, and a control circuit board are provided. The power supply socket is used to provide an AC220V power supply interface for the test fixture; the wiring terminal is connected to the desktop digital multimeter with a multimeter test line; the control circuit board has multiple test channels and is connected to the computer through a serial port to USB data cable.

[0009] In some embodiments, the frame includes: a tooling box body, a pressing plate, and positioning columns; the tooling box body is provided with a tooling box cover, the tooling box cover is provided with a positioning frame, the positioning frame is provided with a movable handle connected by rotation, several positioning columns are provided between the tooling box cover and the positioning frame, the pressing plate slides through the positioning columns, the pressing plate is connected to the movable handle, and the movable handle and the pressing plate are configured such that when the movable handle is pressed down, it will drive the pressing plate to move downward along the positioning columns; a probe unit is connected below the pressing plate; the probe unit is used to perform tests on the PCBA board to be tested under the drive of the pressing plate.

[0010] In some embodiments, the probe unit includes: a needle plate, probes, and pressure columns, the needle plate is fixedly connected to the pressing plate, and the probes and pressure columns are connected below the needle plate.

[0011] In some embodiments, a board positioning device is provided on the tooling box cover below the probes and pressure columns.

[0012] In some embodiments, the mounting holes for fixing the needle board on the pressing plate are cross-slot holes.

[0013] In some embodiments, the needle board includes two needle boards, a main board needle board and a sub-board needle board, and the distance between the sub-board needle board and the pressing plate is smaller than the distance between the main board needle board and the pressing plate.

[0014] In some embodiments, an FPGA radiator is designed below the main board needle board, and the FPGA radiator is connected to the main board needle board through a spring.

[0015] The beneficial effects of the present utility model compared with the prior art are as follows:

[0016] 1) By designing the cross-slot mounting holes for the needle board, the present utility model solves the problems of difficult positioning and calibration of the test needles in the conventional test tooling.

[0017] 2) By independently designing the positioning needle boards for the main board and the sub-board, the present utility model solves the problem of difficult positioning of the test needles for double-layer boards in the conventional test tooling.

[0018] 3) The present utility model has the characteristics of simple principle, easy to understand, easy to purchase supporting components, easy to install, easy to repair, and low cost.

[0019] 4) The present utility model, as a resistance voltage intelligent detection device, solves the problems of troublesome manual resistance voltage testing operation, time-consuming, laborious, low efficiency, and misoperation, which may cause damage to the PCBA board under test.

[0020] 5) The present utility model is simple and convenient to operate, highly efficient, easy to judge, and can achieve the purpose of full inspection.

[0021] 6) The present utility model has no any influence on the performance and indicators of the PCBA board under test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the system wiring diagram of a resistance voltage intelligent detection device of the present utility model.

[0023] Figure 2 is the front view of the test tooling of a resistance voltage intelligent detection device of the present utility model.

[0024] Figure 3 is the rear view of the test tooling of a resistance voltage intelligent detection device of the present utility model.

[0025] Figure 4 is the internal view of the test tooling of a resistance voltage intelligent detection device of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0027] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0030] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or display that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or displays.

[0031] The following will be combined with Figures 1 - 4 to describe in detail a resistive voltage intelligent detection device related to the embodiments of the present application. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation to the present application.

[0032] Embodiment 1:

[0033] As Figures 1 - 4As shown in the figure, an intelligent resistor voltage detection device includes a computer 1, a desktop digital multimeter 2, a test fixture 3, a serial port to USB data cable 5, a multimeter test lead 6, a driver service, and client software.

[0034] The test fixture 3 includes a frame 3-1, a power socket 3-2, a power switch 3-3, a terminal 3-4, an AC-DC power module 3-5, a 12V switch 3-6, a digital voltage / ammeter 3-7, a 12V indicator light 3-8, a fuse 3-9, a control circuit board 3-10, a cooling fan 3-11, and a quick-release connector 3-12.

[0035] The frame 3-1 includes a tooling box body 3-1-1, a positioning frame 3-1-2, a movable handle 3-1-3, a pressing plate 3-1-4, a positioning post 3-1-5, a main board pin board 3-1-6, a sub-board pin board 3-1-7, a test probe 3-1-8, a pressing column 3-1-9, a tooling box cover 3-1-10, a lock 3-1-11, a hinge 3-1-12, an anti-tipping part 3-1-13, a guide rail 3-1-14, an FPGA radiator 3-1-15, a board positioning device 3-1-16, and a foot pad 3-1-17.

[0036] The guide rail is located in the middle of the tooling box and is mainly used to install and fix the control circuit board for convenient loading and unloading during maintenance.

[0037] This device breaks through the conventional test methods of manual resistor voltage testing, manual recording, and manual judgment. It adopts an intelligent testing method and, in cooperation with the test software, realizes automatic testing, recording, judgment, and statistical functions, and can quickly and accurately determine the quality of the PCBA board under test.

[0038] When testing the resistance or voltage of the PCBA board 9 under test, the desktop digital multimeter 2 automatically switches gears through the control of the client software, and transmits the measured resistance value or voltage value to the computer 1 through the serial port to USB data cable 5. By directly observing the computer 1, the test result of the PCBA board 9 under test can be judged. When the resistance values and voltage values measured at all measuring points are within the standard range, the qualified values are displayed in the measurement value column on the computer 1, and "qualified" is displayed in the conclusion column for all, which is regarded as a qualified product; when the resistance values and voltage values measured at one or more measuring points do not meet the standard range, unqualified red "values" are displayed in the measurement value column on the computer 1, and at the same time, "unqualified" in red characters is also prompted in the conclusion column, which is regarded as an unqualified product.

[0039] Before testing the resistance or voltage of the PCBA board 9 under test, the client software on the computer 1 can be used to set the two test modes of "automatic test" or "manual test". When set to the "automatic test" mode, the resistance and voltage of all test points of the PCBA board 9 under test can be tested at one time; when set to the "manual test" mode, a point to be tested can be selected at will on the client software of the computer 1 for testing.

[0040] The control circuit board 3-10 has 48 test channels, which may meet the test requirements of 1 to 48 test points. When the number of test points of the PCBA board 9 under test is greater than 48, the test channels of the control circuit board 3-10 can be expanded to 96 or more.

[0041] The test fixture 3 is designed with a positioning device. There are four positioning columns 3-1-5 on the pressure plate 3-1-4 for positioning. A plurality of pressure columns 3-1-9 and measuring needles 3-1-8 of the same height are evenly arranged on the fixed needle plate 3-1-6 below. When the movable handle 3-1-3 is pressed down, the pressure plate 3-1-4 will be pressed down vertically, and the pressure columns 3-1-9 will be evenly pressed onto the PCBA board 9 under test, so that the PCBA board 9 under test will not be deviated, and the measuring needle 3-1-8 can accurately align with each test point of the PCBA board 9 under test.

[0042] The probe is installed on the needle board, and is installed by laser drilling at the precise location of each measuring point of the PCBA board being tested, and is connected to the control circuit board interface through wires and quick-release connectors.

[0043] The movable handle is located above the pressure plate, and the rear side is connected and fixed to the positioning frame. The mounting hole is designed as a strip hole. The compression amount of the probe can be adjusted by adjusting the height of the movable handle. When the movable handle is pressed, the pressure plate is pressed down, and the probe contacts the measuring point of the measured board. When the movable handle is lifted, the pressure plate is lifted, and the probe is disconnected from the measuring point of the board.

[0044] A quick-release connector is installed on the cables between the 48 relay output terminals of the control circuit board and all the measuring pins of the needle board. Its purpose is to avoid the cumbersome problems of wiring and disconnecting the control circuit board terminals when replacing the needle board.

[0045] The test fixture 3 is of universal design. When testing different PCBA boards, it is only necessary to replace the board positioning device 3-1-16, the needle plate 3-1-6 and the plug cable of the quick-release connector 3-12 to meet the test of other PCBA boards, avoiding the problems of wire removal and complicated wiring during the loading and unloading process, saving the production cost of the test fixture 3 and improving the production efficiency.

[0046] The board positioning device is located below the needle board and is a fixture used to position and fix the PCBA board under test. The positioning device is designed based on the outer dimensions and screw holes of the PCBA board under test. It has a detachable design, allowing for easy replacement of the positioning device when testing different boards.

[0047] The mounting holes for fixing the needle board on the pressure plate 3-1-4 are designed as cross-slot holes. When the measuring needle 3-1-8 is misaligned with the measuring points of the PCBA board 9 under test, the position of the needle board can be finely adjusted through the cross-slot holes of the pressure plate 3-1-4, enabling the measuring needle 3-1-8 to align with the measuring points of the PCBA board 9 under test.

[0048] The test fixture 3 is designed with two needle boards, namely the main board needle board 3-1-6 and the daughter board needle board 3-1-7, mainly for testing when the PCBA board 9 under test has upper and lower layers. When it comes to the main board 9 and the daughter board 9-2 of the PCBA board under test, there are relatively high positioning requirements for the measuring needles 3-1-8, and it is difficult to ensure that all the measuring needles 3-1-8 are fully aligned with all the test points of the main board 9 and the daughter board 9-2 of the PCBA board under test. Through the independent installation design of the main board needle board 3-1-6 and the daughter board needle board 3-1-7, their respective positions are finely adjusted and fixed to achieve the accurate positioning of the measuring needles 3-1-8 and the measuring points.

[0049] The test fixture 3 is equipped with multiple insurance protections. The AC220V power socket 3-2 comes with a fuse tube, providing direct protection for the entire test fixture 3. The PCBA board 9 under test is powered through the fuse tube 3-9 and the relay on the control circuit board 3-10. The fuse tube 3-9 plays a direct protection role for the PCBA board 9 under test. The relay on the control circuit board 3-10 is controlled by the client software to prevent power-off control protection during the resistance test of the PCBA board 9 under test.

[0050] The FPGA 9-1 of the PCBA board 9 under test is equipped with a dual heat dissipation device. There is an FPGA heat sink 3-1-15 designed under the main board needle board 3-1-6 on the FPGA 9-1. There are 4 springs on the FPGA heat sink 3-1-15, and a 1mm thick thermal conductive rubber pad is attached to the bottom. When the movable handle 3-1-3 is pressed down, the 4 springs automatically adjust the height of the FPGA heat sink 3-1-15 according to the actual height of the FPGA 9-1, making the FPGA heat sink 3-1-15 and the thermal conductive rubber pad closely adhere to the FPGA 9-1 chip, achieving a good heat dissipation effect. This avoids damage to the FPGA 9-1 or insufficient heat dissipation caused by improper height control of the FPGA heat sink 3-1-15. Additionally, a 12V DC cooling fan 3-11 is installed on the right side of the FPGA heat sink 3-1-15. The fan blows air directly on the FPGA 9-1 and the FPGA heat sink 3-1-15 for heat dissipation, and also plays a role in blowing air to dissipate heat from other chips.

[0051] During the voltage test of the PCBA board 9 under test by the test fixture 3, the digital display voltage / ammeter 3-7 can monitor the voltage and current of the PCBA board 9 under test in real time.

[0052] At the rear side of the connection part between the tooling box body 3-1-1 and the tooling box cover 3-1-10, two anti-toppling parts 3-1-13 are installed to prevent the tooling box cover 3-1-10 from tipping backward due to unbalanced center of gravity when it is opened.

[0053] The input cost is low, the design is simple, the operation is convenient, efficient, easy to judge, and misoperation can be avoided. It can achieve full inspection, and the test process has no impact on the performance indicators of the product itself. At the same time, it can also meet the requirements of resistance and voltage tests.

[0054] The power socket (with a built-in 10A fuse) is located in the middle left position at the rear side of the tooling box and is a power supply interface for the test fixture with AC220V.

[0055] The power switch (with an AC220V power supply indicator light) is located in the left position at the rear side of the tooling box and is a control switch for the AC220V power supply of the test fixture.

[0056] The AC-DC power module is located at the front right position inside the tooling box and has a total of 4-way DC4.18~16.88V wide voltage DC output. In this solution, it is 4-way DC12V voltage. The first way of DC12V supplies power to the 12V indicator light and the PCBA board under test; the second way of DC12V supplies power to the control board circuit board; the third way of DC12V supplies power to the cooling fan; the fourth way of DC12V supplies power to the digital display voltage / ammeter. The fuse is located at the output end of the fourth way of DC12V of the AC-DC power module inside the tooling box to protect the power supply of the PCBA board under test. The 12V switch is located in the middle left position at the front side of the tooling box and is mainly used to manually control the power supply of the PCBA board under test. The input end is connected to the output end of the fourth way of DC12V of the AC-DC power module, and the output end is connected to the monitoring pins of the 12V indicator light, the fuse, and the digital display voltage / ammeter.

[0057] The 12V indicator light is located on the left side of the 12V switch and is the power supply indicator light of the PCBA board under test. The light is on when the 12V switch is turned "on" and off when the 12V switch is "off". The digital display voltage / ammeter is located in the middle part at the front side of the tooling box and is mainly used to monitor the working voltage and working current of the PCBA board under test during the test process.

[0058] The control circuit board is installed on the rail at the middle position inside the test tooling box and is connected to the computer through a serial port to USB data cable. When testing resistance or voltage, the computer controls the "on" and "off" of the 48-way relay of the control circuit board through the client software.

[0059] The terminal posts are located at the right rear position of the tooling box. A total of 2 groups of terminal posts are designed (2 red and 2 black). One group of terminal posts is left unconnected as a spare interface. The red post of the other group of terminal posts is connected to the relay output terminal of the internal control circuit board, and the black post is connected to the ground pin measurement of the PCBA board under test; the outside of the tooling is connected to the resistance and voltage interfaces of the desktop digital multimeter through the multimeter test wire. The red wire is connected to "positive" and the black wire is connected to "negative". During the resistance and voltage test, when the desktop digital multimeter recognizes the resistance or voltage of each measurement point of the PCBA board under test, it will automatically perform the resistance and voltage measurement, and upload the measured resistance and voltage data to the computer client through the serial port to USB data cable. By directly observing the computer client, the test result of the PCBA board under test can be judged.

[0060] The power supply socket of the test tooling is connected to AC220V voltage, and the power switch is turned on to supply power to the AC-DC power module. The AC-DC power module has 4 DC12V DC outputs. The first DC12V supplies power to the 12V indicator light, fuse tube and the PCBA board under test through the 12V switch and the digital voltage / current meter; the second DC12V supplies power to the control board circuit board; the third DC12V supplies power to the cooling fan; the fourth DC12V supplies power to the digital voltage / current meter. The terminal posts of the test tooling are connected to the desktop digital multimeter with the multimeter test wire 6. The desktop digital multimeter is connected to the computer through the serial port to USB data cable, and the computer is connected to the serial port of the control board with the USB to serial port data cable. After loading the PCBA board under test into the test tooling and turning on the power, open the computer client software to perform the resistance and voltage tests on the PCBA board under test. After the test is completed, directly observing the computer client software can judge the test result of the board. When the resistance values and voltage values measured at all measurement points are within the standard range, the qualified values are displayed in the measurement value column of the computer client software, and "qualified" is displayed in all the conclusion columns, which is regarded as a qualified product; when the resistance values and voltage values measured at one or more measurement points are not within the standard range, the unqualified values are displayed in the measurement value column of the computer client software, and at the same time, "unqualified" in red characters will be prompted in the conclusion column, which is regarded as an unqualified product.

[0061] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent resistance voltage detection device, characterized in that, Including: A test tooling, which is used to connect to the measurement points of the PCBA board under test; A bench digital multimeter, which is used to transmit the measured resistance value or voltage value to the computer through a serial-to-USB data cable.

2. An intelligent resistance voltage detection device according to claim 1, wherein, The test tooling includes: a frame, on which a power socket, a terminal block, and a control circuit board are provided. The power socket is used to provide an AC220V power supply interface for the test tooling; the terminal block is connected to the bench digital multimeter with a multimeter test lead; the control circuit board has multiple test channels and is connected to the computer through a serial-to-USB data cable.

3. An intelligent resistance voltage detection device according to claim 2, characterized in that The frame includes: a tooling box body, a pressing plate, and positioning posts; a tooling box cover is provided on the tooling box body, a positioning frame is provided on the tooling box cover, a movable handle is rotatably connected to the positioning frame, and several positioning posts are provided between the tooling box cover and the positioning frame. The pressing plate slidably penetrates through the positioning posts, and the pressing plate is connected to the movable handle. The movable handle and the pressing plate are configured such that when the movable handle is pressed down, it will drive the pressing plate to move downward along the positioning posts; a probe unit is connected below the pressing plate; the probe unit is used to perform tests on the PCBA board under test under the drive of the pressing plate.

4. An intelligent resistance voltage detection device according to claim 3, characterized in that The probe unit includes: a needle board, probes, and pressing columns. The needle board is fixedly connected to the pressing plate, and the probes and pressing columns are connected below the needle board.

5. An intelligent resistance voltage detection device according to claim 4, characterized in that A board positioning device is provided on the tooling box cover below the probes and pressing columns.

6. An intelligent resistance voltage detection device according to claim 4, characterized in that, The mounting hole for fixing the needle board on the pressing plate is a cross-slot hole.

7. An intelligent resistance voltage detection device according to claim 4, characterized in that, The needle board includes two needle boards, a main board needle board and a sub-board needle board. The distance between the sub-board needle board and the pressing plate is smaller than the distance between the main board needle board and the pressing plate.

8. An intelligent resistance voltage detection device according to claim 7, characterized in that, An FPGA radiator is designed below the main board needle board, and the FPGA radiator is connected to the main board needle board through a spring.

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