An open short test device

Abstract

The utility model discloses a kind of open short-circuit test devices, comprising: single-chip microcontroller, single-chip microcontroller includes control circuit, first pin, power supply component, grounding component, first switch and second switch, control circuit connects first pin, control circuit includes pull-up resistor and pull-down resistor, pull-up resistor is connected power supply component by first switch, pull-down resistor is connected grounding component by second switch, first pin connects pull-up resistor and pull-down resistor;The voltage level of the pin corresponding to the pin of PCBA board stored in contrast learning under different conditions and the voltage level of the pin corresponding to the pin of PCBA board under different conditions can be compared, to determine whether the pin of PCBA board is normal, pull-up switch is used to raise the voltage of first pin, to detect whether the other pin of PCBA board is normal under this condition;Pull-down switch is used to pull down the voltage of first pin, to detect whether the other pin of PCBA board is normal under this condition.

Description

Technical Field

[0001] This utility model relates to the field of single-chip microcomputer technology, and in particular to an open / short circuit testing device. Background Technology

[0002] In the manufacturing process of small household appliances, multiple circuit boards are often connected together using connectors and wires. Because these connectors have many closely spaced pins, soldering can easily result in poor soldering leading to open circuits or short circuits due to solder bridging. This can even damage electronic components or cause short circuits or open circuits due to incorrect soldering. If a short circuit occurs in the power cord, it can easily damage the circuit board or cause a fire. Therefore, this invention provides an open / short circuit testing device. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide an open-circuit and short-circuit testing device.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: an open / short circuit testing device, comprising: The microcontroller includes a control circuit, a first pin, a power supply component, a grounding component, a first switch, and a second switch. The control circuit is connected to the first pin and includes a pull-up resistor and a pull-down resistor. The pull-up resistor is connected to the power supply component through the first switch, and the pull-down resistor is connected to the grounding component through the second switch. The first pin is connected to the pull-up resistor and the pull-down resistor.

[0005] In this technical solution, the control circuit is used to adjust the voltage of the first pin and acquire the voltage of the PCBA board pins through the first pin. This allows the microcontroller to learn the voltage levels of the PCBA board pins under different conditions and apply the learned voltage levels to the detection. During detection, the voltage levels of the PCBA board pins under different conditions stored during learning are compared with the actual voltage levels of the PCBA board pins under different conditions to determine whether the PCBA board pins are normal. The pull-up switch is used to raise the voltage of the first pin to detect whether other pins of the PCBA board are normal under this condition; the pull-down switch is used to lower the voltage of the first pin to detect whether other pins of the PCBA board are normal under this condition.

[0006] In some implementations, the open / short circuit test device further includes a socket under test, and the microcontroller further includes a second pin, with the first pin and the second pin respectively connected to the socket under test.

[0007] In this technical solution, the socket under test is used to connect to the PCBA board to be tested. The first pin and the second pin are respectively connected to the pins on the PCBA board through the socket under test. The second pin is used to detect the voltage of the pins on the PCBA board to which it is connected.

[0008] In some embodiments, the socket under test includes socket terminals, with the first pin and the second pin connected to the socket terminals.

[0009] In this technical solution, the socket under test is connected to the PCBA board through socket terminals, and the first pin and the second pin are connected to the socket terminals, thereby enabling the microcontroller to connect to the PCBA board. The microcontroller pulls the first pin high or low to connect to the corresponding socket terminal pin on the PCBA board, and uses the second pin to detect the remaining pins on the PCBA board, thereby enabling the microcontroller to detect the PCBA board.

[0010] In some embodiments, a third switch is also included, which is connected to the socket terminal and is used to connect the socket terminal to an external device.

[0011] In this technical solution, the third switch is used to connect the socket terminal to the external device, thereby connecting the PCBA board to the external device, which facilitates the performance testing of the PCBA board.

[0012] In some embodiments, the open / short circuit test device further includes an external power supply, and the socket terminals are connected to the external power supply via the third switch.

[0013] In this technical solution, an external power supply is used to raise the voltage of the pins on the PCBA board, thereby detecting the status of each pin on the PCBA board when it is powered on.

[0014] In some implementations, the microcontroller further includes a third pin, which is connected to the third switch.

[0015] In this technical solution, the third pin is used to connect the third switch to the microcontroller, thereby enabling the microcontroller to control the third switch and facilitating automated detection.

[0016] In some embodiments, the open / short circuit test device further includes a control panel, in which the microcontroller is disposed, and a display screen is provided on the control panel, the display screen being connected to the microcontroller.

[0017] In this technical solution, the control panel is used for manual operation and facilitates interaction between the operator and the open / short circuit test device, while the display screen allows the operator to understand the test results.

[0018] In some embodiments, the open / short circuit test device further includes a buzzer, which is mounted on a control panel and connected to the microcontroller.

[0019] In this technical solution, the buzzer is used to alert the operator to the test results of the PCBA board.

[0020] In some embodiments, the open / short circuit test device further includes an adapter board on which the socket under test is disposed.

[0021] In this technical solution, the adapter board is used to connect the PCBA board.

[0022] In some implementations, the microcontroller also includes a storage component.

[0023] In this technical solution, the storage component is used to store the voltages of the pins of the PCBA board under normal conditions, which are learned by the microcontroller.

[0024] The beneficial effects of this invention are as follows: By using a first switch to connect to the power supply component and using a pull-up resistor to adjust the voltage of the first pin to a high level, the system can detect whether other pins on the PCBA board are normal under this condition. By using a second switch to connect to the grounding component and using a pull-down resistor to adjust the voltage of the first pin to a low level, the system can detect whether other pins on the PCBA board are normal under this condition. By using a third switch to connect to an external power supply, the system can test whether each pin of the PCBA board is normal when the external node is connected to the PCBA board, thus completing a comprehensive inspection of the PCBA board and improving its quality. The system uses a microcontroller and control panel for intelligent control, which greatly saves manpower. The microcontroller's storage component stores the voltage of the PCBA board pins under normal conditions. When inspecting a PCBA board, the system compares the detected pin voltage with the corresponding stored pin voltage to automatically determine whether the PCBA board pins are normal, achieving a learning effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the circuit connection of an open / short circuit test device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of an open / short circuit testing device according to an embodiment of the present invention; In the diagram: 1. Microcontroller; 11. First pin; 12. Power supply assembly; 13. Grounding assembly; 14. First switch; 15. Second switch; 16. Pull-up resistor; 17. Pull-down resistor; 18. Second pin; 19. Third pin; 2. Socket under test; 21. Socket terminal; 3. Third switch; 4. External power supply; 5. Control panel; 6. Display screen; 7. Buzzer; 8. Adapter board. Detailed Implementation

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0027] Combined with appendix Figure 1 As shown, this utility model provides an open / short circuit testing device, comprising: The microcontroller 1 includes a control circuit, a first pin 11, a power supply component 12, a grounding component 13, a first switch 14, and a second switch 15. The control circuit is connected to the first pin 11 and includes a pull-up resistor 16 and a pull-down resistor 17. The pull-up resistor 16 is connected to the power supply component 12 through the first switch 14, and the pull-down resistor 17 is connected to the grounding component 13 through the second switch 15. The first pin 11 is connected to the pull-up resistor 16 and the pull-down resistor 17.

[0028] The control circuit is used to adjust the voltage of the first pin 11 and to acquire the voltage of the pins of the PCBA board through the first pin 11. This allows the microcontroller 1 to learn the voltage levels of the PCBA board pins under different conditions and apply the learned voltage levels to the detection. During detection, the voltage levels of the PCBA board pins under different conditions stored during learning are compared with the actual voltage levels of the PCBA board pins under different conditions to determine whether the pins of the PCBA board are normal. The pull-up switch is used to raise the voltage of the first pin 11 to detect whether other pins of the PCBA board are normal under this condition; the pull-down switch is used to lower the voltage of the first pin 11 to detect whether other pins of the PCBA board are normal under this condition.

[0029] For example, a PCBA board includes a first pin under test, a second pin under test, and a third pin under test. The pin of the microcontroller connected to the first pin under test is defined as the first pin 11. The microcontroller 1 controls the first switch 14 to close and the second switch 15 to open. At this time, the power supply component 12 of the control circuit is turned on, and the first pin 11 is in a high-level state. At this time, the voltage of the second pin under test and the third pin under test of the PCBA board is detected when the first pin under test is in a high-level state. This is used to test all pins of the PCBA board. After testing the other pins of the PCBA board when the first pin under test is in a high-level state, the pin connected to the second pin under test of the PCBA board is replaced with the pin connected to the first pin 11, and the voltage of the first pin under test and the third pin under test is tested according to the above method. The pin of the microcontroller connected to the second pin under test and the third pin under test are defined as the first pin 11 in sequence. The voltage of the other pins of the PCBA board, except for the pin connected to the first pin 11, is tested according to the above detection method to determine whether there are any problems between the pins of the PCBA board.

[0030] Continue to combine with the appendix Figure 1 As shown, in some embodiments, the open / short circuit test device further includes a test socket 2, and the microcontroller 1 further includes several second pins 18. The first pin 11 and the second pin 18 are respectively connected to the test socket 2. The test socket 2 is used to connect to the PCBA board to be tested. The first pin 11 and the second pin 18 are respectively connected to the pins on the PCBA board through the test socket 2. The second pin 18 is used to detect the voltage of the pins on the PCBA board to which it is connected.

[0031] Continue to combine with the appendix Figure 1 As shown, in some embodiments, the socket under test 2 includes a socket terminal 21, with the first pin 11 and the second pin 18 connected to the socket terminal 21. The socket under test 2 is connected to the PCBA board through the socket terminal 21, and the first pin 11 and the second pin 18 are also connected to the socket terminal 21, thereby enabling the microcontroller 1 to connect to the PCBA board. The microcontroller 1 can pull up or pull down the corresponding pin on the PCBA board by the first pin 11, and use the second pin 18 to detect the remaining pins on the PCBA board, thereby enabling the microcontroller 1 to detect the PCBA board.

[0032] Continue to combine with the appendix Figure 1 As shown, in some embodiments, a third switch 3 is also included. The third switch 3 is connected to the socket terminal 21 and is used to connect the socket terminal 21 to an external device, thereby connecting the PCBA board to the external device and facilitating performance testing of the PCBA board.

[0033] Continue to combine with the appendix Figure 1As shown, in some embodiments, the open / short circuit test device further includes an external power supply 4. The socket terminal 21 is connected to the external power supply 4 through the third switch 3. The external power supply 4 is used to raise the voltage of the pins on the PCBA board, thereby detecting the status of each pin on the PCBA board when it is powered on.

[0034] Continue to combine with the appendix Figure 1 As shown, in some embodiments, the microcontroller 1 further includes a third pin 19, which is connected to the third switch 3, thereby using the microcontroller 1 to control the third switch 3, which facilitates the automation of detection.

[0035] For example, the microcontroller 1 controls the third switch 3 to close via the third pin 19, thereby connecting the external power supply 4 to the socket terminal 21. This means the power supply connects to all pins on the PCBA board connected to the socket terminal 21. At this time, by raising and lowering the voltage of the first pin 11, the remaining pins of the PCBA board are detected, thereby obtaining the state of the PCBA board when the external power supply 4 provides power. The microcontroller 1 controls the third switch 3 to open via the third pin 19, thereby disconnecting the external power supply 4 from the socket terminal 21. This means the power supply is disconnected from the pins on the PCBA board connected to the socket terminal 21. By raising and lowering the voltage of the first pin 11, the remaining pins of the PCBA board are detected, thereby obtaining the state of the PCBA board when the external power supply 4 does not provide power.

[0036] Continue to combine with the appendix Figure 2 As shown, in some embodiments, the open / short circuit test device further includes a control panel 5, in which the microcontroller 1 is disposed. The control panel 5 is equipped with a display screen 6, which is connected to the microcontroller 1. The control panel 5 is used for manual operation and facilitates interaction between the operator and the open / short circuit test device. The display screen 6 allows the operator to understand the test results. The open / short circuit test device can be controlled by buttons on the control panel 5, such as a "learning" button and an "application" button, which facilitates switching between learning mode and application test mode.

[0037] Continue to combine with the appendix Figure 2 As shown, in some embodiments, the open / short circuit test device further includes a buzzer 7, which is mounted on the control panel 5 and connected to the microcontroller 1. The buzzer 7 is used to alert the operator of the test results of the PCBA board. For example, if a problem is found between the pins of the PCBA board under test during the test, the buzzer 7 will be activated to issue an alarm.

[0038] Continue to combine with the appendix Figure 2As shown, in some embodiments, the open / short circuit test device further includes an adapter board 8, on which the socket under test 2 is disposed, and the adapter board 8 is used to connect the PCBA board.

[0039] In some embodiments, the microcontroller 1 further includes a storage component for storing the voltages of the pins of the PCBA board under normal conditions, which are learned by the microcontroller 1.

[0040] For example, a PCBA board includes a first pin under test, a second pin under test, ..., an Nth pin under test. Using a standard PCBA board, an open / short circuit test device is connected. The pin connected to the first pin under test on the PCBA board is defined as the first pin 11. The pins of the microcontroller connected to the remaining pins on the PCBA board (excluding the first pin) are defined as the second pin 12. After pressing the "Learn" button on the control panel 5, the microcontroller 1 controls the third switch 3 to close, thereby enabling the external power supply 4 to conduct through the socket terminal 21. That is, the power supply conducts through the pins on the PCBA board connected to the socket terminal 21. At this time, by raising and... The voltage of the first pin 11 is pulled low, and the remaining pins of the PCBA board are detected using the second pin 12 to obtain the state of the PCBA board when powered by the external power supply 4. The detected voltage status of each pin is stored as "Sequence 1". Then, the external power supply 4 is disconnected, and the pin connected to the second pin to be tested on the PCBA board is defined as the first pin 11. The pins of the microcontroller connected to the remaining pins of the PCBA board (excluding the first pin) are defined as the second pin 12. The above steps are repeated, and the detected voltage status of the remaining pins of the PCBA board is stored as "Sequence 2"... The pin connected to the first pin under test of the microcontroller on the PCBA board is defined as pin 11. The pins of the microcontroller connected to the remaining pins of the PCBA board (excluding pin 1) are defined as pin 12. After pressing the "Learn" button on the control panel 5, the microcontroller 1 controls the third switch 3 to disconnect, thus disconnecting the external power supply 4 from the socket terminal 21. This disconnects the power supply from the pins connected to the socket terminal 21 on the PCBA board. At this time, by raising and lowering the voltage of pin 11, the remaining pins of the PCBA board are detected, thus obtaining the state of the PCBA board when the external power supply 4 does not provide power. The detected voltage status of each pin is stored as "Sequence N+1". Subsequently, the pin connected to the second pin under test of the microcontroller on the PCBA board is defined as pin 11, and the pins of the microcontroller connected to the remaining pins of the PCBA board (excluding pin 1) are defined as pin 12. The above steps are repeated, and the detected voltage status of the remaining pins of the PCBA board is stored as "Sequence N+2"... When testing other PCBA boards, after pressing the "Apply" button on the control panel 5, the pin connected to the microcontroller and the pin to be tested on the PCBA board is defined as the first pin 11, and the pins of the microcontroller connected to the other pins of the PCBA board (excluding the first pin) are defined as the second pin 12. Based on the pins of the PCBA board connected to the first pin 11 and the status of the third switch 3, the detection voltage status of the corresponding pin stored in the microcontroller 1 is retrieved, and the stored detection voltage status of the pin is compared with the actual pin voltage detection status to determine whether the PCBA board is qualified. If the pin of the microcontroller connected to the third pin to be tested is the first pin, and the third switch is in the open state, the detection voltage status of the other pins of the PCBA board corresponding to "Sequence 3" is retrieved as a reference.

[0041] In summary, this utility model provides an open / short circuit testing device. It uses a first switch to connect to a power supply component and a pull-up resistor to adjust the voltage of the first pin to a high level, detecting whether other pins on the PCBA board are normal under this condition. A second switch is used to connect to a grounding component and a pull-down resistor to adjust the voltage of the first pin to a low level, detecting whether other pins on the PCBA board are normal under this condition. A third switch is used to connect to an external power supply to test whether the pins of the PCBA board are normal when external nodes are connected to the PCBA board, completing a comprehensive inspection of the PCBA board and thus improving its quality. Intelligent control using a microcontroller and control panel greatly saves manpower. The microcontroller's storage component stores the voltages of the PCBA board pins under normal conditions. When testing a PCBA board, the detected pin voltage is compared with the stored pin voltages under corresponding conditions to automatically determine whether the PCBA board pins are normal, achieving a learning effect.

[0042] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. An open / short circuit testing device, characterized in that, include: The microcontroller includes a control circuit, a first pin, a power supply component, a grounding component, a first switch, and a second switch. The control circuit is connected to the first pin and includes a pull-up resistor and a pull-down resistor. The pull-up resistor is connected to the power supply component through the first switch, and the pull-down resistor is connected to the grounding component through the second switch. The first pin is connected to the pull-up resistor and the pull-down resistor.

2. The open / short circuit testing device according to claim 1, characterized in that, It also includes a socket to be tested, and the microcontroller also includes a second pin, with the first pin and the second pin respectively connected to the socket to be tested.

3. The open / short circuit testing device according to claim 2, characterized in that, The socket under test includes socket terminals, and the first pin and the second pin are connected to the socket terminals.

4. The open / short circuit testing device according to claim 3, characterized in that, It also includes a third switch, which is connected to the socket terminal and is used to connect the socket terminal to an external device.

5. The open / short circuit testing device according to claim 4, characterized in that, It also includes an external power supply, and the socket terminals are connected to the external power supply via the third switch.

6. The open / short circuit testing device according to claim 4, characterized in that, The microcontroller also includes a third pin, which is connected to the third switch.

7. The open / short circuit testing device according to claim 1, characterized in that, It also includes a control panel, in which the microcontroller is located, and a display screen is provided on the control panel, which is connected to the microcontroller.

8. The open / short circuit testing device according to claim 7, characterized in that, It also includes a buzzer, which is mounted on the control panel and connected to the microcontroller.

9. The open / short circuit testing device according to claim 2, characterized in that, It also includes an adapter board, on which the socket to be tested is mounted.

10. The open / short circuit testing device according to claim 1, characterized in that, The microcontroller also includes a storage component.

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