Line fault monitoring circuit and system

Abstract

The utility model provides a line fault monitoring circuit and system, the line fault monitoring circuit comprises a first detection end, N second detection ends, N monitoring branches, a first switch module, a second switch module, a first prompt module and a second prompt module, the first detection end is connected with the first ends of N lines to be detected, and the second detection end is connected with the second ends of the N lines to be detected. The N second detection ends are connected with the second ends of the N lines to be detected in a one-to-one correspondence manner, and the N monitoring branches are connected with the N second detection ends in a one-to-one correspondence manner. When the to-be-detected line is disconnected due to faults such as line breakage, node looseness or intermittent open circuit in the to-be-detected line, real-time alarm prompting can be performed, and fault points can be found conveniently.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a line fault monitoring circuit and a system. Background Art

[0002] In the electrical circuit of the engine unit, vibration may cause line breakage, loose nodes or intermittent circuit breaking, making it difficult to locate the fault point and troubleshoot. Utility Model Content

[0003] In view of this, the embodiments of the present utility model provide a line fault monitoring circuit and system, which can provide real-time alarm prompts when faults such as line breakage, node loosening or intermittent circuit breaking occur in the line to be tested, making it easier to find the fault point.

[0004] According to one aspect of the utility model, a line fault monitoring circuit is provided, which is connected to N lines to be tested, where N is a natural number; the line fault monitoring circuit comprises:

[0005] A first detection terminal connected to the first terminals of the N lines to be tested;

[0006] N second detection terminals are connected to the second terminals of the N lines to be tested in a one-to-one correspondence;

[0007] N monitoring branches, the N monitoring branches are connected to the N second detection terminals one by one; the monitoring branch comprises a relay, the moving contact of the relay is connected to the first detection terminal, the normally open contact of the relay is connected to the first end of its coil, and the second end of the coil of the relay is connected to the corresponding second detection terminal;

[0008] A first switch module comprises N first switch branches; a first end of the N first switch branches is connected to a first end of a power source, and a second end of the N first switch branches is connected to a first end of the coils of the N relays in a one-to-one correspondence;

[0009] The second switch module comprises N second switch branches; the first ends of the N second switch branches are connected to the second end of the power supply, and the second ends of the N second switch branches are connected to the second ends of the coils of the N relays in a one-to-one correspondence;

[0010] A first prompt module, connected to the normally open contacts of the N relays;

[0011] The second prompt module is connected to the normally closed contacts of the N relays.

[0012] Optionally, the number of turns of the coil of the relay is adjustable.

[0013] Optionally, the coil of the relay comprises a variable turns resistor.

[0014] Optionally, the first switch branch and the second switch branch include inching switches.

[0015] Optionally, the first prompt module includes a light emitting diode.

[0016] Optionally, the second prompt module includes a buzzer.

[0017] Optionally, the power supply includes a direct current power supply or an alternating current power supply.

[0018] According to another aspect of the present invention, a line fault monitoring system is provided, comprising the above-mentioned line fault monitoring circuit.

[0019] The line fault monitoring circuit and system provided in the embodiments of the present application can provide a real-time alarm when a line break, loose node, or intermittent circuit break occurs in the line to be tested, causing the line to be disconnected, thereby facilitating the locating of the fault point; and can maintain the fault prompt state when the line to be tested is turned on again, thereby facilitating timely processing by the staff and improving reliability; and can also monitor multiple lines to be tested at one time, thereby providing strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Further details, features and advantages of the present invention are disclosed in the following description of exemplary embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 A schematic diagram of the structure of a circuit fault monitoring circuit according to an exemplary embodiment of the utility model is shown;

[0022] Figure 2 A circuit diagram of a fault monitoring circuit according to an exemplary embodiment of the utility model is shown;

[0023] Figure 3 A schematic structural diagram of a road fault monitoring system according to an exemplary embodiment of the utility model is shown. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0025] It should be understood that the various steps described in the method implementation of the present utility model can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present utility model is not limited in this respect.

[0026] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in the present utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0027] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0028] The names of the messages or information exchanged between multiple devices in the implementation manner of the present utility model are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0029] The exemplary embodiment of the present utility model provides a line fault monitoring circuit 100, which is connected to N lines to be tested, where N is a natural number. Figure 1As shown, the line fault monitoring circuit 100 includes a first detection terminal, N second detection terminals, N monitoring branches 110, a first switch module 120, a second switch module 130, a first prompt module 140 and a second prompt module 150, wherein a first detection terminal is connected to the first terminals of the N lines to be tested, the N second detection terminals are connected to the second terminals of the N lines to be tested in a one-to-one correspondence, and the N monitoring branches 110 are connected to the N second detection terminals in a one-to-one correspondence. The monitoring branch includes a relay, the moving contact of the relay is connected to the first detection terminal, the normally open contact of the relay is connected to the first terminal of its coil, and the second terminal of the coil of the relay is connected to the corresponding second detection terminal. The first switch module 120 includes N first switch branches, the first terminals of the N first switch branches are connected to the first terminal of the power supply, and the second terminals of the N first switch branches are connected to the first terminals of the coils of the N relays in a one-to-one correspondence. The second switch module 130 includes N second switch branches, the first ends of the N second switch branches are connected to the second end of the power supply, and the second ends of the N second switch branches are connected to the second ends of the coils of the N relays in a one-to-one correspondence. The first prompt module 140 is connected to the normally open contacts of the N relays, and the second prompt module 150 is connected to the normally closed contacts of the N relays.

[0030] In this embodiment, the first switch module 120 and the second switch module 130 are controlled to be turned on and then turned off. When the first switch module 120 and the second switch module 130 are turned on, the coil of the relay is energized, the moving contact of the relay is disconnected from the normally closed contact and connected to the normally open contact. When the first switch module 120 and the second switch module 130 are disconnected, if the circuit to be tested is turned on, the coil of the relay remains energized, the moving contact of the relay remains disconnected from the normally closed contact and remains connected to the normally open contact, and the first prompt module 140 prompts that the circuit to be tested is normal. When a fault such as line break, loose node or intermittent circuit break occurs in the circuit to be tested, the coil of the relay is de-energized, the moving contact of the relay is connected to the normally closed contact and disconnected from the normally open contact, and the second prompt module 150 prompts that a fault has occurred in the circuit to be tested. During the vibration process, even if the circuit to be tested is turned on again, the coil of the relay continues to remain de-energized, the moving contact of the relay is connected to the normally closed contact and disconnected from the normally open contact, and the second prompt module 150 continues to prompt that a fault has occurred in the circuit to be tested.

[0031] In this embodiment, when the line to be tested is disconnected due to faults such as line breakage, loose nodes or intermittent circuit breaking, a real-time alarm can be given to facilitate finding the fault point; and the fault prompt state can be maintained when the line to be tested is turned on again, which is convenient for staff to handle in time and improves reliability; and multiple lines to be tested can be monitored at one time, which is highly practical.

[0032] In some embodiments, the number of turns of the coil of the relay is adjustable.

[0033] As an implementation mode, the coil of the relay includes a variable turns resistor, and the variable turns resistor can be used to replace the original coil of the relay, or the variable turns resistor can be connected in series with the original coil.

[0034] In this embodiment, the current can be changed by changing the number of turns of the coil of the relay, and the strength of the electromagnetic field can be controlled, thereby adjusting the sensitivity of the relay. As an example, the number of turns of the variable turns resistor is adjusted so that the normally open contact of the relay is at a critical value that can be closed, so as to improve the sensitivity of the relay.

[0035] The first switch branch and the second switch branch include a jog switch, the first prompt module 140 includes a light emitting diode, the second prompt module 150 includes a buzzer, the power supply includes a DC power supply or an AC power supply, and the relay includes a DC relay or an AC relay. When the relay is a DC relay, a DC power supply can be used, and when the relay is an AC relay, an AC power supply can be used.

[0036] As an example, Figure 2 As shown, N is set to 3. The three second detection terminals include a second detection point 1, a second detection terminal 2, and a second detection terminal 3. The second detection point 1, the second detection terminal 2, and the second detection terminal 3 are respectively connected to the circuit to be tested 1, the circuit to be tested 2, and the circuit to be tested 3 in a one-to-one correspondence. The three monitoring branches include relay 1, relay 2, and relay 3, respectively. Relay 1 includes coil 1, relay 2 includes coil 2, and relay 3 includes coil 3. The first switch module 120 includes a moment switch S11, a moment switch S12, and a moment switch S13. The second switch module 130 includes a moment switch S21, a moment switch S22, and a moment switch S23. The first prompt module 140 includes a light-emitting diode D1, a light-emitting diode D2, and a light-emitting diode D3. The second prompt module 150 includes a buzzer B1.

[0037] The moving contacts of relay 1, relay 2 and relay 3 are connected to the first detection terminal, and the first detection terminal is grounded. The normally open contact of relay 1 is connected to the first end of coil 1, the second end of coil 1 is connected to the cathode of light-emitting diode D1, and the anode of light-emitting diode D1 is connected to the second detection terminal 1. The normally open contact of relay 1 is connected to the first end of moment switch S11, the second end of moment switch S11 is connected to the moving contact of relay 1, the normally closed contact of relay 1 is connected to the first end of buzzer B1, the second end of buzzer B1 is connected to the first end of moment switch S21, and the second end of moment switch S21 is connected to the second detection terminal 1. The second end of moment switch S11 is also connected to the cathode of DC power supply, and the first end of moment switch S21 is also connected to the anode of DC power supply.

[0038] The normally open contact of relay 2 is connected to the first end of coil 2, the second end of coil 2 is connected to the cathode of light emitting diode D2, and the anode of light emitting diode D2 is connected to the second detection terminal 2. The normally open contact of relay 2 is connected to the first end of inching switch S12, the second end of inching switch S12 is connected to the moving contact of relay 2, the normally closed contact of relay 2 is connected to the first end of buzzer B1, the second end of buzzer B1 is connected to the first end of inching switch S22, and the second end of inching switch S22 is connected to the second detection terminal 2. The second end of inching switch S12 is also connected to the cathode of DC power supply, and the first end of inching switch S22 is also connected to the anode of DC power supply.

[0039] The normally open contact of the relay 3 is connected to the first end of the coil 3, the second end of the coil 3 is connected to the cathode of the light emitting diode D3, and the anode of the light emitting diode D3 is connected to the second detection terminal 3. The normally open contact of the relay 3 is connected to the first end of the inching switch S13, the second end of the inching switch S13 is connected to the moving contact of the relay 3, the normally closed contact of the relay 3 is connected to the first end of the buzzer B1, the second end of the buzzer B1 is connected to the first end of the inching switch S23, and the second end of the inching switch S23 is connected to the second detection terminal 3. The second end of the inching switch S13 is also connected to the cathode of the DC power supply, and the first end of the inching switch S23 is also connected to the anode of the DC power supply.

[0040] In this example, the inching switches S11, S12, S13, S21, S22 and S23 are pressed in a momentary manner, coil 1, coil 2 and coil 3 are energized, the moving contacts of relay 1, relay 2 and relay 3 are disconnected from the normally closed contacts and connected to the normally open contacts, light-emitting diodes D1, D2 and D3 continue to emit light, and the buzzer does not make a sound.

[0041] When a fault occurs in the circuit 1 to be tested, such as a broken circuit, loose nodes or intermittent circuit breakage, and the circuits 2 and 3 to be tested are normally connected, the coil 1 is de-energized, the moving contact of the relay 1 is connected to the normally closed contact and disconnected from the normally open contact, the LED D1 is extinguished, the LEDs D2 and D3 continue to emit light, and the buzzer B1 flashes and howls.

[0042] When the circuit 1 to be tested is turned on again, the coil 1 remains in the de-energized state, the moving contact of the relay 1 is continuously turned on with the normally closed contact and continuously turned off with the normally open contact, the light-emitting diode D1 remains in the off state, the light-emitting diode D2 and the light-emitting diode D3 continue to emit light, and the buzzer B1 remains in the flashing and howling state.

[0043] The exemplary embodiment of the utility model further provides a line fault monitoring system 1000, such as Figure 3As shown, it includes a line fault monitoring circuit 100. In the line fault monitoring system 1000, when a line break, loose nodes, intermittent circuit break or other faults occur in the line to be tested, resulting in disconnection of the line to be tested, an alarm can be given in real time, which is convenient for finding the fault point; and the fault prompt state can be maintained when the line to be tested is turned on again, which is convenient for the staff to handle in time and improves reliability; and multiple lines to be tested can be monitored at one time, which is highly practical.

[0044] The above are only preferred embodiments of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A line fault monitoring circuit, connected to N lines to be tested, where N is a natural number; characterized in that: include: A first detection terminal connected to the first terminals of the N lines to be tested; N second detection terminals are connected to the second terminals of the N lines to be tested in a one-to-one correspondence; N monitoring branches, the N monitoring branches are connected to the N second detection terminals one by one; the monitoring branch comprises a relay, the moving contact of the relay is connected to the first detection terminal, the normally open contact of the relay is connected to the first end of its coil, and the second end of the coil of the relay is connected to the corresponding second detection terminal; A first switch module comprises N first switch branches; a first end of the N first switch branches is connected to a first end of a power source, and a second end of the N first switch branches is connected to a first end of the coils of the N relays in a one-to-one correspondence; The second switch module comprises N second switch branches; the first ends of the N second switch branches are connected to the second end of the power supply, and the second ends of the N second switch branches are connected to the second ends of the coils of the N relays in a one-to-one correspondence; A first prompt module, connected to the normally open contacts of the N relays; The second prompt module is connected to the normally closed contacts of the N relays.

2. The line fault monitoring circuit according to claim 1, characterized in that: The number of turns of the coil of the relay is adjustable.

3. The line fault monitoring circuit according to claim 1, characterized in that: The coil of the relay includes a variable turns resistor.

4. The line fault monitoring circuit according to claim 1, characterized in that: The first switch branch and the second switch branch include inching switches.

5. The line fault monitoring circuit according to claim 1, characterized in that: The first prompt module includes a light emitting diode.

6. The line fault monitoring circuit according to claim 1, characterized in that: The second prompt module includes a buzzer.

7. The line fault monitoring circuit according to claim 1, characterized in that: The power supply includes a direct current power supply or an alternating current power supply.

8. A line fault monitoring system, characterized in that: The invention comprises the line fault monitoring circuit according to any one of claims 1 to 7.

Images