Portable cable fault detection device

Abstract

The utility model discloses a portable cable fault detection device comprising a casing, the upper surface of the casing is fixedly connected with a power switch, the upper surface of the casing is fixedly connected with a power indicating lamp, the upper surface of the casing is fixedly connected with a result indicating lamp, and the front of the casing is provided with an access door. The device is composed of the two binding posts, after the cable assembly to be detected is connected to the binding posts and the closed-loop switch, the power indicating lamp and the result indicating lamp are observed, the red lamp is turned on to indicate that the fault detection device works normally, the green lamp is turned on to indicate that the detected cable assembly has an open-circuit fault, operation is easy, and the result is visual. The fault detection device composed of the storage battery, the power switch, the power indicating lamp, the resistor, the Schmitt trigger, the D trigger, the result indicating lamp and the cable assembly test clamp is adopted, all components and electromechanical components are commonly used, the structure is simple, the cost is low, and in-situ detection of the open-circuit fault of the cable assembly on platforms such as airplanes and automobiles is facilitated.

Description

Technical Field

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

[0002] The development of electromechanical equipment has driven the development of cables. Cables, as an important medium for realizing system information transmission and power supply, are like the "neural network" of electromechanical equipment, and are an important guarantee for realizing system functions. Cable assemblies are an assembly combination of a group of wires, cables, connectors and accessories. After processing, sorting and arrangement, they can be installed or disassembled as a component. All wiring of the whole machine can be assembled by several cable assemblies. Therefore, cable assemblies are the most basic component unit of the whole machine interconnection and the core of the whole machine cable interconnection design technology.

[0003] Due to cable aging, external damage, wear, corrosion and other problems, cable assemblies may experience open circuit faults. Current cable assembly open circuit fault detection usually focuses on the average value. For example, a multimeter can easily detect continuous open circuit faults, but intermittent open circuit faults, especially short-term intermittent open circuit faults of the nanosecond level, are difficult to detect. High-speed oscilloscopes are usually used to detect intermittent open circuit faults in cable assemblies. These oscilloscopes are not only expensive, but also large in size and complex to operate, making them difficult to promote in industrial field environments.

[0004] To this end, we propose a portable cable fault detection device to solve the above problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a portable cable fault detection device to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A portable cable fault detection device includes a casing, a power switch is fixedly connected to the upper surface of the casing, a power indicator light is fixedly connected to the upper surface of the casing, a result indicator light is fixedly connected to the upper surface of the casing, an inspection door is provided in the front of the casing, a support plate is fixedly connected to the inner wall of the casing, a D trigger is fixedly installed on the upper surface of the support plate, a Schmitt trigger is fixedly installed on the upper surface of the support plate, a resistor is fixedly installed on the upper surface of the support plate, a battery is fixedly installed on the inner bottom wall of the casing, an insulating plate is fixedly connected to the right side of the casing, and two binding posts are fixedly connected to the upper surface of the insulating plate.

[0008] In a further embodiment, mounting holes are provided on the front of the inspection door and the front of the casing, and bolts are threadedly connected to the inner walls of the two groups of mounting holes.

[0009] In a further embodiment, two through openings are provided on the upper surface of the support plate, and a set of wire-holding concave plates are fixedly connected to the inner wall of each through opening.

[0010] In a further embodiment, a protective shell is hinged to the right side of the housing via a pin, a transverse plate is fixedly connected to the right side of the protective shell, and each of the terminal posts is located inside the protective shell.

[0011] In a further embodiment, two groups of foot pads are fixedly connected to the bottom surface of the housing, a handle is fixedly connected to the upper surface of the housing, and a group of heat dissipation holes are opened on the left and right side surfaces of the housing.

[0012] In a further embodiment, a charging connector is fixedly embedded on the left side of the housing, and the output end of the charging connector is electrically connected to the input end of the battery through a wire.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This device is composed of two binding posts. The user only needs to connect the cable assembly to be tested to the binding posts, close the loop switch, and observe the power indicator light and the result indicator light. The red light indicates that the fault detection device is working normally, and the green light indicates that the cable assembly under test has an open circuit fault. The operation is simple and the results are intuitive. The fault detection device is composed of a battery, a power switch, a power indicator light, a resistor, a Schmitt trigger, a D trigger, a result indicator light and a cable assembly test fixture. These are all commonly used components and electromechanical components. They are simple in composition and low in cost, making it convenient for in-situ detection of open circuit faults in cable assemblies on platforms such as aircraft and automobiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a portable cable fault detection device.

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of a top-down view of a portable cable fault detection device.

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of a front cross-section view of a portable cable fault detection device.

[0018] Figure 4 A schematic diagram of the three-dimensional structure of a side cross-section of a protective shell of a portable cable fault detection device;

[0019] Figure 5 This is the circuit distribution diagram of the portable cable fault detection device.

[0020] In the figure: 1. Casing; 2. Power indicator light; 3. Power switch; 4. Result indicator light; 5. Carrying handle; 6. Protective shell; 7. Heat dissipation holes; 8. Horizontal plate; 9. Bolts; 10. Inspection door; 11. Mounting holes; 12. Support plate; 13. D trigger; 14. Schmitt trigger; 15. Resistor; 16. Wire retaining plate; 17. Through port; 18. Insulation plate; 19. Battery; 20. Terminals; 21. Foot pad; 22. Charging connector. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-5 In the utility model, a portable cable fault detection device includes a housing 1, a power switch 3 is fixedly connected to the upper surface of the housing 1, a battery 19 is connected to the power switch 3, a power indicator light 2 and a resistor 15 through a wire, a power indicator light 2 is fixedly connected to the upper surface of the housing 1, and the power indicator light 2 adopts a green light emitting diode, a result indicator light 4 is fixedly connected to the upper surface of the housing 1, and the result indicator light 4 adopts a red light emitting diode, an inspection door 10 is provided in front of the housing 1, a support plate 12 is fixedly connected to the inner wall of the housing 1, and a D trigger 13 is fixedly installed on the upper surface of the support plate 12, and the D trigger 13 selects the 74LS74 model. When powered on, since the direct reset terminal is directly connected to the power ground, a low-level signal is output by default after power-on, and the result indicator light 4 is extinguished; after power-on is completed, when working normally, Identify the rising edge of the shaped high-level pulse generated by the intermittent open-circuit fault of the cable assembly under test, and output a high-level signal on the rising edge to light up the result indicator light 4. A Schmitt trigger 14 is fixedly installed on the upper surface of the support plate 12. The Schmitt trigger 14 adopts the 74HC14 model. The Schmitt trigger 14 is used to shape the high-level pulse with noise and irregular edges generated by the intermittent open-circuit fault of the cable assembly under test to form a clear and regular pulse signal, which is used as the trigger clock of the D trigger 13. A resistor 15 is fixedly installed on the upper surface of the support plate 12. The resistor 15 adopts a power resistor of ten kiloohms. A battery 19 is fixedly installed on the inner bottom wall of the casing 1. The right side of the casing 1 is fixedly connected to an insulating plate 18. The upper surface of the insulating plate 18 is fixedly connected to two terminals 20.

[0023] In this embodiment, mounting holes 11 are provided on the front of the inspection door 10 and the front of the casing 1, and the inner walls of the two groups of mounting holes 11 are threadedly connected with bolts 9. The inspection door 10 can be disassembled by providing bolts 9, and the internal equipment can be inspected.

[0024] In this embodiment, two through openings 17 are provided on the upper surface of the support plate 12, and a set of wire-holding recessed plates 16 are fixedly connected to the inner wall of each through opening 17. The through openings 17 can facilitate the extension of the power transmission line of the battery 19 to the top of the support plate 12, and the wires can be limited by the wire-holding recessed plates 16 to prevent the wires from shaking.

[0025] In this embodiment, the right side of the casing 1 is hinged with a protective shell 6 through a pin shaft, and the right side of the protective shell 6 is fixedly connected with a horizontal plate 8. Each terminal 20 is located inside the protective shell 6. The protective shell 6 can protect the terminal 20 to avoid collision when carrying.

[0026] In this embodiment, two sets of foot pads 21 are fixedly connected to the bottom surface of the casing 1, and a handle 5 is fixedly connected to the upper surface of the casing 1. A set of heat dissipation holes 7 are opened on the left and right sides of the casing 1. The handle 5 can facilitate the staff to carry the device by hand, so that the device can be carried easily, and the heat dissipation holes 7 can increase air flow to avoid heat accumulation. The foot pads 21 can support the casing 1 to prevent the casing 1 from directly contacting the ground.

[0027] In this embodiment, a charging connector 22 is fixedly embedded on the left side of the housing 1. The output end of the charging connector 22 is electrically connected to the input end of the battery 19 through a wire. The charging connector 22 can be used to charge the battery 19 to ensure the charging speed of the battery 19.

[0028] The working principle of this utility model is:

[0029] When in use, the cable assembly to be tested is connected to the two terminal posts 20, and then the closed-loop power switch 3 is turned on to energize the D trigger 13 and the Schmitt trigger 14. The high-level pulse with noise and irregular edges generated by the intermittent open circuit fault of the cable assembly to be tested is shaped by the Schmitt trigger 14 to form a clear and regular pulse signal, which is used as the trigger clock of the D trigger 13, and the signal is transmitted to the D trigger 13. When the D trigger 13 detects an intermittent open circuit fault, it identifies the rising edge of the shaped high-level pulse generated by the intermittent open circuit fault of the cable assembly to be tested, and outputs a high-level signal on the rising edge to turn on the result indicator light 4. When the D trigger 13 does not detect an intermittent open circuit fault, the result indicator light 4 remains in the off state.

[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Portable cable fault detection device, characterized by: The invention comprises a housing (1), wherein a power switch (3) is fixedly connected to the upper surface of the housing (1), a power indicator light (2) is fixedly connected to the upper surface of the housing (1), a result indicator light (4) is fixedly connected to the upper surface of the housing (1), an inspection door (10) is provided in front of the housing (1), a support plate (12) is fixedly connected to the inner wall of the housing (1), a D trigger (13) of model 74LS74 is fixedly installed on the upper surface of the support plate (12), a Schmitt trigger (14) is fixedly installed on the upper surface of the support plate (12), a resistor (15) is fixedly installed on the upper surface of the support plate (12), a battery (19) is fixedly installed on the inner bottom wall of the housing (1), an insulating plate (18) is fixedly connected to the right side of the housing (1), and two terminals (20) are fixedly connected to the upper surface of the insulating plate (18).

2. The portable cable fault detection device according to claim 1, characterized in that: The front of the inspection door (10) and the front of the housing (1) are both provided with mounting holes (11), and the inner walls of the two groups of mounting holes (11) are commonly threadedly connected with bolts (9).

3. The portable cable fault detection device according to claim 1, characterized in that: Two through openings (17) are provided on the upper surface of the support plate (12), and a group of wire-holding concave plates (16) are fixedly connected to the inner wall of each through opening (17).

4. The portable cable fault detection device according to claim 1, characterized in that: The right side of the housing (1) is hinged to a protective shell (6) via a pin, the right side of the protective shell (6) is fixedly connected to a transverse plate (8), and each of the terminal posts (20) is located inside the protective shell (6).

5. The portable cable fault detection device according to claim 1, characterized in that: Two sets of foot pads (21) are fixedly connected to the bottom surface of the housing (1), a handle (5) is fixedly connected to the upper surface of the housing (1), and a set of heat dissipation holes (7) are provided on both the left and right side surfaces of the housing (1).

6. The portable cable fault detection device according to claim 1, characterized in that: A charging connector (22) is fixedly embedded on the left side of the housing (1), and the output end of the charging connector (22) is electrically connected to the input end of the battery (19) via a wire.

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