Cable Fault Detection Equipment

Abstract

The utility model relates to a cable fault detection device, which belongs to the technical field of cable fault detection, and solves the problems of poor reliability and easy error detection of cable detection in the prior art. The cable fault detection device includes: an output interface connected to the input end of an output amplifier circuit, the output end of the output amplifier circuit connected to the input end of an output inverter, and the output end of the output inverter connected to an external interface; an input interface connected to the output end of an input amplifier circuit, the input end of the input amplifier circuit connected to the output end of an input inverter, and the input end of the input inverter connected to an external interface; the external interfaces of a first input-output combination and a second input-output combination are connected to a power supply through a voltage-dividing resistor, and the input interface and the output interface are connected to an MCU; the external interface of the first input-output combination is connected to one end of a cable to be tested, and the external interface of the second input-output combination is connected to the other end of the cable to be tested. Accurate fault detection of the cable is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable fault detection, in particular to a cable fault detection device. Background Art

[0002] Cables are the neural networks of modern communications. The quality of cables directly affects the security of communications. Cable testing, as a key link in ensuring cable quality, must be taken seriously.

[0003] At present, cable testing usually uses a multimeter to test point by point manually. When testing cables, testers need to switch back and forth between different cables and different contacts, which is inconvenient. Poor reliability, long cycle, and manual fatigue not only lead to missed detection, but also easy to cause false detection. Once a false detection occurs, a fault may occur after use. At this time, the line needs to be checked again. If the fault is serious, it may cause equipment damage.

[0004] Therefore, there is an urgent need for a technical solution for cable fault detection. Utility Model Content

[0005] In view of the above analysis, the utility model aims to provide a cable fault detection device to solve the problems of poor reliability and easy misdetection of cable detection in the prior art.

[0006] The purpose of this utility model is mainly achieved through the following technical solutions:

[0007] The cable fault detection device includes an MCU, a power supply, a voltage dividing resistor, at least one first input-output combination and at least one second input-output combination;

[0008] The first input-output combination and the second input-output combination both include an external interface, an input amplifier circuit, an input interface, an input inverter, an output inverter, an output amplifier circuit and an output interface; the output interface is connected to the input end of the output amplifier circuit, the output end of the output amplifier circuit is connected to the input end of the output inverter, and the output end of the output inverter is connected to the external interface; the input interface is connected to the output end of the input amplifier circuit, the input end of the input amplifier circuit is connected to the output end of the input inverter, and the input end of the input inverter is connected to the external interface;

[0009] The external interfaces of the first input-output combination and the second input-output combination are connected to the power supply through a voltage-dividing resistor, and the input interface and the output interface are connected to the MCU;

[0010] The external interface of the first input-output combination is connected to one end of the cable to be tested, and the external interface of the second input-output combination is connected to the other end of the cable to be tested.

[0011] Based on the further improvement of the above scheme, the input amplifier circuit and the output amplifier circuit both include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and an operational amplifier A;

[0012] The output end of the operational amplifier A is connected to one end of the first resistor R1 and serves as the output end of the input amplifier circuit and the output amplifier circuit;

[0013] The inverting input terminal of the operational amplifier A is connected to the other end of the first resistor R1 and one end of the second resistor R2; the other end of the second resistor R2 is grounded;

[0014] The in-phase input terminal of the operational amplifier A is connected to one end of the third resistor R3 and one end of the fourth resistor R4 at the same time; the other end of the third resistor R3 serves as the input end of the input amplifier circuit and the output amplifier circuit; the other end of the fourth resistor R4 is grounded.

[0015] Based on the further improvement of the above solution, the cable fault detection device further includes a first switching module and a second switching module.

[0016] One end of the first adapter module is connected to the external interface of the first input-output combination, and the other end is connected to one end of the cable to be tested;

[0017] One end of the second adapter module is connected to the external interface of the second input-output combination, and the other end is connected to the other end of the cable to be tested.

[0018] Based on the further improvement of the above solution, the first adapter module and the second adapter module both include a standard cable, an adapter board and an adapter socket;

[0019] The standard cable includes a first number of connecting wires, one end of the connecting wire is connected to the external interface of the corresponding input-output combination, the other end of the connecting wire is connected to the corresponding first welding hole of the adapter board, and the corresponding second welding hole of the adapter board is connected to one end of the adapter socket;

[0020] The other end of the adapter socket of the first adapter module is connected to one end of the cable to be tested; the other end of the adapter socket of the second adapter module is connected to the other end of the cable to be tested.

[0021] Based on the further improvement of the above solution, the cable fault detection device also includes a packaging box;

[0022] The MCU, power supply, voltage dividing resistor, first input-output combination, second input-output combination, standard cable and adapter board are arranged inside the packaging box;

[0023] The adapter sockets of the first adapter module and the second adapter module are arranged outside the packaging box and are used to connect the cable to be tested.

[0024] Based on a further improvement of the above solution, a detachable handle is further provided on the outside of the packaging box.

[0025] Based on the further improvement of the above solution, the cable fault detection device also includes multiple types of adapters, each adapter corresponding to a type of cable to be tested;

[0026] One end of the adapter is connected to the other end of the adapter socket, and the other end of the adapter is connected to the cable to be tested.

[0027] Based on the further improvement of the above solution, the cable fault detection device also includes a wireless communication module and a PCB board;

[0028] The wireless communication module, the MCU, the first input-output combination, and the second input-output combination are integrated on a PCB board;

[0029] The wireless communication module is connected to the communication port of the MCU.

[0030] Based on the further improvement of the above solution, the wireless communication module is a ZigBee module, a Bluetooth module or a Wi-Fi module.

[0031] Based on the further improvement of the above solution, the MCU also includes a control bus interface, and the MCU is connected to the external device through the control bus interface;

[0032] The control bus interface type is RS232 type, USB type or GPIB type.

[0033] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0034] The MCU is connected to both ends of the cable to be tested through the first input-output combination and the second input-output combination to realize cable fault detection, and the detection signal is amplified by combining the output amplifier circuit and the input amplifier circuit to improve the sensitivity of the detection signal and realize accurate detection of the cable.

[0035] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the following content, and some advantages can be obvious from the description or understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents specifically pointed out in the text and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0037] Figure 1A schematic diagram of the structure of the cable fault detection device provided by the utility model;

[0038] Figure 2 A schematic diagram of the principle of conducting continuity detection on a tested cable provided by the utility model;

[0039] Figure 3 A schematic diagram of the structure of an input amplifier circuit or an output amplifier circuit provided by the utility model;

[0040] Figure 4 A schematic diagram of the structure of the first adapter module or the second adapter module provided by the utility model;

[0041] 1-First input and output combination or second input and output combination; 2-Standard cable;

[0042] 3- Adapter board; 4- Adapter socket; 5- Cable to be tested. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0044] A specific embodiment of the utility model discloses a cable fault detection device, such as Figure 1 As shown, the cable fault detection device includes an MCU, a power supply, a voltage-dividing resistor, at least one first input-output combination and at least one second input-output combination;

[0045] The first input-output combination and the second input-output combination both include an external interface, an input amplifier circuit, an input interface, an input inverter, an output inverter, an output amplifier circuit and an output interface; the output interface is connected to the input end of the output amplifier circuit, the output end of the output amplifier circuit is connected to the input end of the output inverter, and the output end of the output inverter is connected to the external interface; the input interface is connected to the output end of the input amplifier circuit, the input end of the input amplifier circuit is connected to the output end of the input inverter, and the input end of the input inverter is connected to the external interface;

[0046] The external interfaces of the first input-output combination and the second input-output combination are connected to the power supply through a voltage-dividing resistor, and the input interface and the output interface are connected to the MCU;

[0047] The external interface of the first input-output combination is connected to one end of the cable to be tested, and the external interface of the second input-output combination is connected to the other end of the cable to be tested.

[0048] Specifically, Figure 1As shown, the MCU is connected to both ends of the cable to be tested through the first input-output combination and the second input-output combination, so as to detect each cable in the cable to be tested. It is worth noting that the MCU uses the first input-output combination and the second input-output combination to send and receive detection signals to the cable to be tested, thereby realizing fault detection of the cable.

[0049] Specifically, there are various types of cables. The number of first input-output combinations and second input-output combinations is determined according to the number of cables included in the cable. The two numbers are the same and should be greater than the maximum number of cables included in the cable, so that the cable fault detection device can be applicable to more types of cables.

[0050] When connecting to the cable to be tested, it is necessary to make a reasonable connection according to the actual situation of the type of the cable to be tested. For example, if there are 4 cables in the cable to be tested, 4 first input-output combinations are required to output 4 wires to connect to one end of the cable to be tested, and 4 second input-output combinations are required to output 4 wires to connect to the other end of the cable to be tested. After the connection is completed, the MCU sends a detection signal to the cable to be tested by controlling different first input-output combinations and second input-output combinations, and receives the detection signal according to the first input-output combination and the second input-output combination. It determines whether the cable to be tested has a fault based on the sent and received detection signals, thereby accurately detecting the fault of the cable to be tested.

[0051] Specifically, Figure 1 As shown, in each of the first input-output combination and the second input-output combination, the output interface is connected to the input end of the output amplifier circuit, the output end of the output amplifier circuit is connected to the input end of the output inverter, and the output end of the output inverter is connected to the external interface; the input interface is connected to the output end of the input amplifier circuit, the input end of the input amplifier circuit is connected to the output end of the input inverter, the input end of the input inverter is connected to the external interface, and the external interface of the first input-output combination and the second input-output combination is connected to the power supply through a voltage divider resistor, and the input interface and the output interface are connected to the MCU.

[0052] Specifically, Figure 1 As shown, the external interface of each first input-output combination and the second input-output combination also needs to be connected to the power supply through a voltage divider resistor, thereby realizing the detection of the cable to be tested. Preferably, the power supply is a rechargeable lithium battery or a replaceable dry battery, so that it can be reused and save resources.

[0053] Specifically, Figure 2As shown, when one of the cables under test is tested, U2A and U4A are output inverters, U1A and U3A are input inverters, and the MCU is connected to the first input-output combination and the second input-output combination through the input interface and the output interface. When the tested cable is tested for conduction, the MCU outputs a positive voltage value through port 1 of U2A, and port 2 of U2A becomes a negative voltage value after inversion. Since port 1 of U1A is connected to port 2 of U2A, port 1 of U1A is also a negative voltage value, and the input of port 2 of U1A is a positive voltage value after inversion. Since a positive value is output to this detection point, the outputs of the remaining detection points are all negative voltage values, so the detection point at the other end of the detected loop outputs a negative voltage value, that is, port 1 of U4A outputs a negative voltage value.

[0054] If the tested cable is open circuit, after the second reversal of U4A and U3A, the input of U3A's port 2 is also a negative voltage value; if the tested cable is open circuit, although the output of U4A's port 1 is a negative voltage value, since U4A's port 2 is also connected to U2A's port 2, U4A is open circuit and does not have a reverse effect. Because U3A's port 1 is connected to U2A's port 2 as a negative voltage value, the input of U3A's port 2 after the reversal is a positive voltage value. That is, by outputting different positive and negative voltage values ​​to the input and output combination through the MCU, the continuity of the tested cable can be determined. When testing the tested cable, you only need to set the detection sequence to perform continuity detection on all tested cables of the tested cable.

[0055] It is worth noting that when the MCU sends a detection signal to the output inverter, the detection signal is amplified by the output amplifier circuit to increase the signal strength before being input to the cable under test; at the same time, when the MCU receives the detection signal through the input inverter, the received detection signal is amplified by the input amplifier circuit to increase the strength of the received detection signal and improve the signal-to-noise ratio, so that the MCU can achieve high-precision detection based on the sent and received detection signals, thereby improving the detection accuracy of the cable fault detection device.

[0056] Preferably, if Figure 3 As shown, the input amplifier circuit and the output amplifier circuit both include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and an operational amplifier A;

[0057] The output end of the operational amplifier A is connected to one end of the first resistor R1 and serves as the output end of the input amplifier circuit and the output amplifier circuit;

[0058] The inverting input terminal of the operational amplifier A is connected to the other end of the first resistor R1 and one end of the second resistor R2; the other end of the second resistor R2 is grounded;

[0059] The in-phase input terminal of the operational amplifier A is connected to one end of the third resistor R3 and one end of the fourth resistor R4 at the same time; the other end of the third resistor R3 serves as the input end of the input amplifier circuit and the output amplifier circuit; the other end of the fourth resistor R4 is grounded.

[0060] Specifically, the MCU inputs the sending detection signal to the input end of the output amplifier circuit through the output interface, and then outputs it to the input end of the output inverter through the output end of the output amplifier circuit, and is connected to the external interface after passing through the output inverter; at the same time, after the external interface receives the detection signal, the receiving detection signal is transmitted to the input end of the input amplifier circuit through the input inverter, and then output to the output interface through the output end of the input amplifier circuit, and finally transmitted to the MCU; the MCU determines whether the cable to be tested has a fault based on the sending detection signal and the receiving detection signal.

[0061] Preferably, if Figure 1 As shown, the cable fault detection device further includes a first switching module and a second switching module.

[0062] One end of the first adapter module is connected to the external interface of the first input-output combination, and the other end is connected to one end of the cable to be tested;

[0063] One end of the second adapter module is connected to the external interface of the second input-output combination, and the other end is connected to the other end of the cable to be tested.

[0064] Specifically, the first adapter module is used to connect the external interface of the first input-output combination to one end of the cable to be tested, and the second adapter module is used to connect the external interface of the second input-output combination to the other end of the cable to be tested. By docking the first adapter module and the second adapter module with the cable to be tested, the cable fault detection device can be adapted to select more cable types, thereby improving the practicality of the cable fault detection device.

[0065] Preferably, Figure 4 As shown, the first adapter module and the second adapter module both include a standard cable, an adapter board and an adapter socket;

[0066] The standard cable includes a first number of connecting wires, one end of the connecting wire is connected to the external interface of the corresponding input-output combination, the other end of the connecting wire is connected to the corresponding first welding hole of the adapter board, and the corresponding second welding hole of the adapter board is connected to one end of the adapter socket;

[0067] The other end of the adapter socket of the first adapter module is connected to one end of the cable to be tested; the other end of the adapter socket of the second adapter module is connected to the other end of the cable to be tested.

[0068] Specifically, Figure 4As shown, 1 is the first input-output combination or the second input-output combination, 2 is the standard cable, 3 is the adapter board, 4 is the adapter socket, and 5 is the cable to be tested. The number of connecting wires included in the standard cable is the same as the number of the first input-output combination or the second input-output combination. Specifically, the external interface of each first input-output combination is connected to the cable to be tested through the first adapter module, and the external interface of each second input-output combination is connected to the cable to be tested through the second adapter module.

[0069] Specifically, the first adapter module and the second adapter module both include a standard cable, an adapter board and an adapter socket. Welding holes are provided at both ends of the adapter board. The first welding hole is used to connect the standard cable, and the second welding hole is used to connect the adapter socket.

[0070] Preferably, the cable fault detection device further includes multiple types of adapters, each adapter corresponding to a type of cable to be tested;

[0071] One end of the adapter is connected to the other end of the adapter socket, and the other end of the adapter is connected to the cable to be tested.

[0072] Specifically, different cables to be tested include different numbers of cables, and different adapters are provided. The adapter socket is connected to the cable to be tested through the adapter. By using an adapter of the same model to connect the cable to be tested, the accuracy of detection is improved.

[0073] Preferably, the cable fault detection device further comprises a packaging box;

[0074] The MCU, power supply, voltage dividing resistor, first input-output combination, second input-output combination, standard cable and adapter board are arranged inside the packaging box;

[0075] The adapter sockets of the first adapter module and the second adapter module are arranged outside the packaging box and are used to connect the cable to be tested.

[0076] Specifically, the MCU, power supply, voltage-dividing resistor, first input-output combination, second input-output combination, standard cable and adapter board are arranged inside the packaging box; at the same time, the adapter sockets of the first adapter module and the second adapter module are arranged outside the packaging box for connecting the cable to be tested, which is more convenient to use and improves the practicability of the cable fault detection equipment.

[0077] Preferably, a detachable handle is also provided on the outside of the packaging box.

[0078] Specifically, the detachable handle may include various types to adapt to different carrying scenarios, making the cable fault detection device more convenient to move and use.

[0079] Preferably, the cable fault detection device further comprises a wireless communication module and a PCB board;

[0080] The wireless communication module, the MCU, the first input-output combination, and the second input-output combination are integrated on a PCB board;

[0081] The wireless communication module is connected to the communication port of the MCU.

[0082] Specifically, the wireless communication module is used for wireless communication with external devices, such as mobile phones, computers and other external device terminals. The wireless communication module starts to detect the cable to be tested according to the instructions of the external device terminal. After the detection is completed, the detection result can be transmitted back to the external device terminal through the wireless communication module, so that the user can view the detection result more conveniently. For example, the wireless communication module is a ZigBee module, a Bluetooth module or a Wi-Fi module.

[0083] Preferably, the MCU further includes a control bus interface, and the MCU is connected to an external device via the control bus interface;

[0084] The control bus interface type is RS232 type, USB type or GPIB type.

[0085] Specifically, the MCU may also include a control bus interface, through which it communicates with an external device terminal, and starts testing the cable to be tested according to the instruction of the external device terminal, and after the test is completed, the test result may be transmitted back to the external device terminal through the control bus interface, so that the user can view the test result more conveniently, for example, through an RS232 type, USB type or GPIB type control bus.

[0086] Preferably, the MCU also includes an alarm indicator light.

[0087] Specifically, when testing the cable to be tested, if a cable break is detected, the user can be notified through the alarm indicator. Specifically, the alarm indicator is connected to the MCU, and when the MCU receives the result of the cable break, the alarm indicator is controlled to notify the user, so that the user can understand the detection situation more timely.

[0088] Preferably, the cable fault detection device further comprises a printer;

[0089] The printer is connected to the MCU to print the test results.

[0090] Specifically, when the MCU completes the detection of the cable to be tested, the detection result can be printed out through a connected printer for the user to view.

[0091] Compared with the prior art, the embodiment of the utility model provides a cable fault detection device, in which the MCU is connected to the two ends of the cable to be tested through a first input-output combination and a second input-output combination to realize cable fault detection, and the detection signal is amplified in combination with the output amplifier circuit and the input amplifier circuit to improve the sensitivity of the detection signal, thereby realizing accurate detection of the cable.

[0092] Those skilled in the art can understand that the program / software involved in the MCU in the above embodiment is a common method in the prior art, such as running the cable fault detection method in the prior art in the MCU, and the present utility model does not involve any improvement in software. The present utility model only needs to connect each device with corresponding functions through the connection relationship given in the embodiment of the present utility model, which does not involve any improvement in program software. As for the connection method between the hardware devices with corresponding functions, it can be implemented by those skilled in the art using the prior art, and will not be described in detail here.

[0093] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A cable fault detection device, characterized in that: The cable fault detection device includes an MCU, a power supply, a voltage dividing resistor, at least one first input-output combination and at least one second input-output combination; The first input-output combination and the second input-output combination each include an external interface, an input amplifier circuit, an input interface, an input inverter, an output inverter, an output amplifier circuit and an output interface; the output interface is connected to the input end of the output amplifier circuit, the output end of the output amplifier circuit is connected to the input end of the output inverter, and the output end of the output inverter is connected to the external interface; The input interface is connected to the output end of the input amplifier circuit, the input end of the input amplifier circuit is connected to the output end of the input inverter, and the input end of the input inverter is connected to the external interface; The external interfaces of the first input-output combination and the second input-output combination are connected to the power supply through a voltage-dividing resistor, and the input interface and the output interface are connected to the MCU; The external interface of the first input-output combination is connected to one end of the cable to be tested, and the external interface of the second input-output combination is connected to the other end of the cable to be tested.

2. The cable fault detection device according to claim 1, characterized in that: The input amplifier circuit and the output amplifier circuit both include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and an operational amplifier A; The output end of the operational amplifier A is connected to one end of the first resistor R1 and serves as the output end of the input amplifier circuit and the output amplifier circuit; The inverting input terminal of the operational amplifier A is connected to the other end of the first resistor R1 and one end of the second resistor R2; the other end of the second resistor R2 is grounded; The in-phase input terminal of the operational amplifier A is connected to one end of the third resistor R3 and one end of the fourth resistor R4 at the same time; the other end of the third resistor R3 serves as the input end of the input amplifier circuit and the output amplifier circuit; the other end of the fourth resistor R4 is grounded.

3. The cable fault detection device according to claim 1, characterized in that: The cable fault detection device further includes a first switching module and a second switching module. One end of the first adapter module is connected to the external interface of the first input-output combination, and the other end is connected to one end of the cable to be tested; One end of the second adapter module is connected to the external interface of the second input-output combination, and the other end is connected to the other end of the cable to be tested.

4. The cable fault detection device according to claim 3, characterized in that: The first adapter module and the second adapter module both include a standard cable, an adapter board and an adapter socket; The standard cable includes a first number of connecting wires, one end of the connecting wire is connected to the external interface of the corresponding input-output combination, the other end of the connecting wire is connected to the corresponding first welding hole of the adapter board, and the corresponding second welding hole of the adapter board is connected to one end of the adapter socket; The other end of the adapter socket of the first adapter module is connected to one end of the cable to be tested; the other end of the adapter socket of the second adapter module is connected to the other end of the cable to be tested.

5. The cable fault detection device according to claim 4, characterized in that: The cable fault detection device also includes a packaging box; The MCU, power supply, voltage dividing resistor, first input-output combination, second input-output combination, standard cable and adapter board are arranged inside the packaging box; The adapter sockets of the first adapter module and the second adapter module are arranged outside the packaging box and are used to connect the cable to be tested.

6. The cable fault detection device according to claim 5, characterized in that: The outside of the packaging box is also provided with a detachable handle.

7. The cable fault detection device according to claim 4, characterized in that: The cable fault detection equipment also includes multiple types of adapters, each adapter corresponding to a type of cable to be tested; One end of the adapter is connected to the other end of the adapter socket, and the other end of the adapter is connected to the cable to be tested.

8. The cable fault detection device according to claim 1, characterized in that: The cable fault detection device also includes a wireless communication module and a PCB board; The wireless communication module, the MCU, the first input-output combination, and the second input-output combination are integrated on a PCB board; The wireless communication module is connected to the communication port of the MCU.

9. The cable fault detection device according to claim 8, characterized in that: The wireless communication module is a ZigBee module, a Bluetooth module or a Wi-Fi module.

10. The cable fault detection device according to claim 1, characterized in that: The MCU also includes a control bus interface, through which the MCU is connected to external devices; The control bus interface type is RS232 type, USB type or GPIB type.

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