Intelligent open circuit and short circuit detection equipment
The intelligent testing equipment, which uses analog switching circuits and MCU control, solves the problem of low efficiency in traditional manual testing, and achieves efficient and accurate open circuit and short circuit detection, avoiding detection omissions.
Patent Information
- Application Number
- CN202522027199.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-22
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2035-09-22
AI Technical Summary
Traditional open-circuit and short-circuit detection methods for wire harnesses or interfaces are inefficient, prone to omissions during manual measurement, and cannot be detected in time, leading to potentially serious consequences.
The intelligent testing equipment, which uses analog switching circuits and MCU control, selects the target core wire through an analog switching chip, and uses LED indicators and buzzers to indicate and alarm the test results, thereby achieving automated testing.
It achieves efficient and accurate open-circuit and short-circuit detection, avoids detection omissions, and improves detection efficiency and accuracy.
Smart Images
Figure CN223501148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of detection circuit technology, and in particular to an intelligent detection device for open circuit and short circuit. Background Technology
[0002] In traditional open-circuit and short-circuit testing of wire harnesses or interfaces, manual methods are often used to determine the presence of open-circuit and short-circuit defects by measuring continuity with a multimeter in beep mode. However, in power electronic systems, wire harnesses or interfaces are complex in type and have a large number of core wires. Manual measurement is not only inefficient, but also may miss core wires during measurement, making it impossible to guarantee the accuracy of the measurement results. When open-circuit or short-circuit occurs in the wire harness or interface, it may not be detected in time, which may lead to serious consequences. This testing method can no longer meet current technical and management requirements.
[0003] Therefore, it is necessary to provide detection circuits to avoid the problem of missed detections due to open circuits or short circuits. Utility Model Content
[0004] In view of the above problems, this utility model is proposed to provide an intelligent open circuit and short circuit detection device that overcomes or at least partially solves the above problems.
[0005] This utility model provides an intelligent detection device for open circuits and short circuits, comprising:
[0006] Input interface, connected to one end of the circuit to be tested;
[0007] The output interface connects to the other end of the circuit under test.
[0008] An analog switch circuit includes an input connection module and an output connection module. The input connection module is connected to an input interface, and the output connection module is connected to an output interface. Both the input connection module and the output connection module include an analog switch chip. The analog switch chip is used to determine the target core wire of the circuit to be tested based on selection.
[0009] The MCU is connected to the analog switch circuit.
[0010] The LED indicator circuit is connected to the MCU and is used to indicate the detection results of the target core wire.
[0011] Preferably, the input connection module includes at least one analog switch chip, and the output connection module includes at least one analog switch chip;
[0012] The analog switch chip includes: 8 core connection pins, 1 enable pin, 3 select pins, and 1 common pin.
[0013] Preferably, when both the input connection module and the output connection module include a first analog switch chip, it is used to detect a circuit under test with up to 8 core wires.
[0014] Preferably, when both the input connection module and the output connection module include a second analog switch chip and a third analog switch chip, it is used to detect a circuit under test with up to 15 core wires;
[0015] The common pin of the second analog switch chip is connected to any one of the core wire connection pins of the third analog switch chip.
[0016] Preferably, when both the input connection module and the output connection module include a fourth analog switch chip, a fifth analog switch chip, and a sixth analog switch chip, it is used to detect a circuit under test with up to 22 core wires.
[0017] The common pin of the fourth analog switch chip is connected to any one of the core wire connection pins of the sixth analog switch chip, and the common pin of the fifth analog switch chip is connected to any one of the remaining core wire connection pins of the sixth analog switch chip.
[0018] Preferably, during open circuit detection, the MCU inputs a first selection signal to the analog switch circuit, causing the input connection module of the analog switch circuit to select the first core wire, and the output connection module to select the corresponding first core wire. It is then determined whether the total output terminal of the analog switch circuit is at a high level. If yes, the first core wire is determined to be open circuit; otherwise, the first core wire is determined to be conducting normally, and the first core wire is the target core wire.
[0019] Preferably, during short-circuit detection, the MCU inputs a second selection signal to the analog switch circuit, causing the input connection module of the analog switch circuit to select the second core wire and the output connection module to select the third core wire. The third core wire is another core wire unrelated to the second core wire. It is determined whether the output of the analog switch circuit is high. If yes, it is determined that there is no short circuit between the second core wire and the third core wire. If no, it is determined that there is a short circuit between the second core wire and the third core wire.
[0020] Preferably, the LED indicator circuit includes:
[0021] Blue indicator light, green indicator light, and red indicator light;
[0022] When the device is in the detection phase, the blue indicator light illuminates.
[0023] When the equipment test is completed and the test result is qualified, the green indicator light will illuminate;
[0024] When the equipment finishes testing and the test result is unqualified, the red indicator light will illuminate.
[0025] If the test result is qualified, the target core wire is free from short circuits or continuity; if the test result is unqualified, the target core wire is short-circuited or open-circuited.
[0026] Preferably, it further includes:
[0027] A buzzer, connected to the MCU, is used to turn on or off based on the detection result of the target core wire.
[0028] Preferably, it further includes:
[0029] The display screen, connected to the MCU, is used to display the detection results based on the target core wire.
[0030] One or more technical solutions in the embodiments of this utility model have at least the following technical effects or advantages:
[0031] This utility model provides an intelligent open-circuit and short-circuit detection device, comprising: an input interface connected to one end of the circuit under test; an output interface connected to the other end of the circuit under test; an analog switch circuit, including an input connection module and an output connection module, wherein the input connection module is connected to the input interface and the output connection module is connected to the output interface, and both the input connection module and the output connection module include an analog switch chip, which is used to determine the target core wire of the circuit under test based on selection; an MCU connection module switch circuit; and an LED indicator circuit connected to the MCU, used to indicate the detection result of the target core wire. By using the analog switch circuit to realize the selection and detection of the target core wire, the detection results of all target core wires are provided, avoiding detection omissions. Attached Figure Description
[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference figures denote the same parts throughout the drawings. In the drawings:
[0033] Figure 1 This diagram illustrates the structure of the intelligent open-circuit and short-circuit detection device according to an embodiment of the present invention.
[0034] Figure 2 This invention provides a schematic diagram showing the structure of the input connection module, which includes three analog switches, in an embodiment of the present invention.
[0035] Figure 3 This invention provides a schematic diagram showing the structure of the output connection module, which includes three analog switches, in an embodiment of the present invention.
[0036] Figure 4A schematic diagram of another open-circuit and short-circuit intelligent detection device in an embodiment of this utility model is shown. Detailed Implementation
[0037] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0038] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this utility model, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0039] This utility model embodiment provides an intelligent open-circuit and short-circuit detection device, such as... Figure 1 As shown, it includes:
[0040] Input interface 101 is connected to one end of the circuit to be tested;
[0041] Output interface 102 is connected to the other end of the circuit under test;
[0042] The analog switch circuit 103 includes an input connection module 1031 and an output connection module 1032. The input connection module 1031 is connected to the input interface 101, and the output connection module 1032 is connected to the output interface 102. Both the input connection module 1031 and the output connection module 1032 are analog switch chips. The analog switch chips are used to determine the target core wire of the circuit to be tested based on selection.
[0043] MCU104 is connected to analog switch circuit 103;
[0044] LED indicator circuit 105, connected to MCU, is used to indicate the detection results of the target core wire.
[0045] In a specific implementation, the MCU104 controls the analog switch circuit 103 to select and control the target core wire in the detection circuit, thereby realizing the detection of open circuit and short circuit of the target core wire.
[0046] Specifically, the input connection module 1031 includes at least one analog switch chip, and the output connection module 1032 includes at least one analog switch chip;
[0047] The analog switch chip includes: 8 core connection pins, 1 enable pin, 3 select pins, and 1 common pin.
[0048] The different implementation methods are described in detail below:
[0049] When both the input connection module 1031 and the output connection module 1032 include a first analog switch chip, it is used to detect a circuit under test with up to 8 core wires.
[0050] In this process, one end of the core wire of the circuit to be tested is connected to one of the eight core wire connection pins of the first analog switch chip. The enable pin E# and the select pins S0, S1 and S2 are connected to the IO ports of the MCU104. The same applies to the first analog switch chip of the input connection module 1031 and the first analog switch chip of the output connection module 1032.
[0051] The operation of a single analog multiplexer is controlled by controlling the enable pin E#, and the connection of the core wire connection pins (Y0~Y7) and the common pin Z is selected by controlling the selection pins (S0, S1, S2), thereby realizing the subsequent open circuit and short circuit detection.
[0052] In this configuration, if the common pin Z of either the input connection module 1031 or the output connection module 1032 is grounded, then the common pin Z of the other first analog switch chip is connected to the MCU 104.
[0053] When both the input connection module 1031 and the output connection module 1032 include a second analog switch chip, it is used to detect a circuit under test with up to 15 core wires; wherein, the common pin Z of the second analog switch chip is connected to any core wire connection pin Yi of the third analog switch chip.
[0054] Since the second analog switch chip has 8 pins for connecting wires and the third analog switch chip has 7 pins for connecting wires, the remaining pin is used to connect to the common pin Z of the second analog switch chip. Therefore, 8 + 7 = 15 wires can be detected.
[0055] If the common pin Z of either the input connection module 1031 or the output connection module 1032 is grounded, then the common pin Z of the other third analog switch chip is connected to the MCU 104.
[0056] like Figure 2 , Figure 3As shown, when both the input connection module 1031 and the output connection module 1032 include a fourth analog switch chip 201, a fifth analog switch chip 202, and a sixth analog switch chip 203, they are used to detect a circuit under test with up to 22 core wires. The common pin Z of the fourth analog switch chip 201 is connected to any one of the core wire connection pins Yi of the sixth analog switch chip 203, and the common pin Z of the fifth analog switch chip 202 is connected to any remaining core wire connection pin of the sixth analog switch chip.
[0057] Thus, since the fourth analog switch chip 201 has 8 core wire connection pins, the fifth analog switch chip 202 has 8 core wire connection pins, and the sixth analog switch chip 203 occupies two core wire connection pins Yi and Yj to connect to the fourth analog switch chip 201 and the fifth analog switch chip 202 respectively, 8+8+6=22 core wires can be detected.
[0058] If the common pin Z of either the input connection module 1031 or the output connection module 1032 of the sixth analog switch chip is grounded, then the common pin Z of the other third analog switch chip is connected to the MCU 104.
[0059] Of course, there are many more connection methods available to match the detection of more core wires, which will not be elaborated on here.
[0060] The following tests are performed to detect open circuits and short circuits respectively:
[0061] During open circuit detection, MCU104 inputs a first selection signal to analog switch circuit 103, causing input connection module 1031 of analog switch circuit 103 to select the first core wire and output connection module 1031 to select the corresponding first core wire. It then determines whether the output of analog switch circuit 103 is high. If yes, it determines that the first core wire is open. If no, it determines that the first core wire is conducting normally and is the target core wire.
[0062] In other words, if the first core wire is open, both ends of the first core wire are grounded and at a low level. If a high level occurs, it indicates that the wire is open.
[0063] During short circuit detection, the short circuit detection is a detection between any two different core wires. The MCU104 inputs a second selection signal to the analog switch circuit 103, causing the input connection module 1031 of the analog switch circuit 103 to select the second core wire and the output connection module 1032 to select the third core wire. The third core wire is another core wire that is not related to the second core wire. It is determined whether the output of the analog switch circuit is high. If it is, it is determined that there is no short circuit between the second core wire and the third core wire. If not, it is determined that there is a short circuit between the second core wire and the third core wire.
[0064] The second and third core wires can be any two core wires in the circuit under test. That is, when the second and third core wires are short-circuited, since one end is grounded, the output of the other end will be low, which indicates a short circuit. Of course, if it is high, it means that the second and third core wires are not short-circuited.
[0065] In one optional embodiment, the LED indicator circuit 105 includes a blue indicator, a green indicator, and a red indicator; the blue indicator is lit when the open circuit / short circuit intelligent detection device is in the process of detection; the green indicator is lit when the open circuit / short circuit intelligent detection device finishes detection and the detection result is qualified; and the red indicator is lit when the open circuit / short circuit intelligent detection device finishes detection and the detection result is unqualified.
[0066] The detection status of the detection equipment is indicated by indicator lights of different colors, which can clearly show the detection status at different times.
[0067] like Figure 4 As shown, in one optional embodiment, the intelligent detection device further includes a buzzer 106 connected to the MCU 104, used to turn on and off based on the detection results of the target core wire.
[0068] Specifically, if the test results of the target core wire indicate an open circuit or short circuit, an alarm will be triggered via buzzer 106; if the test results of the target core wire indicate that the core wire is normal, the buzzer will be turned off. The buzzer alarm can visually remind the tester to pay attention.
[0069] In one optional implementation, the intelligent testing device further includes a display screen 107 connected to an MCU 104, used to display the test results based on the target core wire, showing whether the unqualified core wire is open or short-circuited, and which specific core wire is unqualified.
[0070] In addition, the intelligent testing equipment is equipped with a power interface and a power switch to provide power to various components.
[0071] One or more technical solutions in the embodiments of this utility model have at least the following technical effects or advantages:
[0072] This utility model provides an intelligent open-circuit and short-circuit detection device, comprising: an input interface connected to one end of the circuit under test; an output interface connected to the other end of the circuit under test; an analog switch circuit, including an input connection module and an output connection module, wherein the input connection module is connected to the input interface and the output connection module is connected to the output interface, and both the input connection module and the output connection module include an analog switch chip, which is used to determine the target core wire of the circuit under test based on selection; an MCU connection module switch circuit; and an LED indicator circuit connected to the MCU, used to indicate the detection result of the target core wire. By using the analog switch circuit to realize the selection and detection of the target core wire, the detection results of all target core wires are provided, avoiding detection omissions.
[0073] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0074] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. An intelligent detection device for open circuits and short circuits, characterized in that, include: Input interface, connected to one end of the circuit to be tested; The output interface connects to the other end of the circuit under test. An analog switch circuit includes an input connection module and an output connection module. The input connection module is connected to an input interface, and the output connection module is connected to an output interface. Both the input connection module and the output connection module include an analog switch chip. The analog switch chip is used to determine the target core wire of the circuit to be tested based on selection. The MCU is connected to the analog switch circuit. The LED indicator circuit is connected to the MCU and is used to indicate the detection results of the target core wire.
2. The intelligent open-circuit and short-circuit detection device as described in claim 1, characterized in that, The input connection module includes at least one analog switch chip, and the output connection module includes at least one analog switch chip. The analog switch chip includes: 8 core connection pins, 1 enable pin, 3 select pins, and 1 common pin.
3. The intelligent open-circuit and short-circuit detection device as described in claim 2, characterized in that, When both the input connection module and the output connection module include a first analog switch chip, it is used to detect a circuit under test with up to 8 core wires.
4. The intelligent open-circuit and short-circuit detection device as described in claim 2, characterized in that, When both the input connection module and the output connection module include a second analog switch chip and a third analog switch chip, it is used to detect a circuit under test with up to 15 core wires. The common pin of the second analog switch chip is connected to any one of the core wire connection pins of the third analog switch chip.
5. The intelligent open-circuit and short-circuit detection device as described in claim 2, characterized in that, When both the input connection module and the output connection module include a fourth analog switch chip, a fifth analog switch chip, and a sixth analog switch chip, it is used to detect a circuit under test with up to 22 core wires. The common pin of the fourth analog switch chip is connected to any one of the core wire connection pins of the sixth analog switch chip, and the common pin of the fifth analog switch chip is connected to any one of the remaining core wire connection pins of the sixth analog switch chip.
6. The intelligent open-circuit and short-circuit detection device as described in claim 2, characterized in that, During open circuit detection, the MCU inputs a first selection signal to the analog switch circuit, causing the input connection module of the analog switch circuit to select the first core wire, and the output connection module to select the corresponding first core wire. It is then determined whether the total output terminal of the analog switch circuit is at a high level. If yes, the first core wire is determined to be open circuit; otherwise, the first core wire is determined to be conducting normally, and the first core wire is the target core wire.
7. The intelligent open-circuit and short-circuit detection device as described in claim 2, characterized in that, During short-circuit detection, the MCU inputs a second selection signal to the analog switch circuit, causing the input connection module of the analog switch circuit to select the second core wire and the output connection module to select the third core wire. The third core wire is another core wire that is not related to the second core wire. It is determined whether the output of the analog switch circuit is high. If it is, it is determined that there is no short circuit between the second core wire and the third core wire. If not, it is determined that there is a short circuit between the second core wire and the third core wire.
8. The intelligent open-circuit and short-circuit detection device as described in claim 1, characterized in that, The LED indicator circuit includes: Blue indicator light, green indicator light, and red indicator light; When the device is in the detection phase, the blue indicator light illuminates. When the equipment test is completed and the test result is qualified, the green indicator light will illuminate; When the equipment finishes testing and the test result is unqualified, the red indicator light will illuminate. If the test result is qualified, the target core wire is free from short circuits or continuity; if the test result is unqualified, the target core wire is short-circuited or open-circuited.
9. The intelligent open-circuit and short-circuit detection device as described in claim 8, characterized in that, Also includes: A buzzer, connected to the MCU, is used to turn on or off based on the detection result of the target core wire.
10. The intelligent open-circuit and short-circuit detection device as described in claim 8, characterized in that, Also includes: The display screen, connected to the MCU, is used to display the detection results based on the target core wire.