Open circuit detection circuit and open circuit detection system

Abstract

The utility model discloses an open circuit detection circuit and an open circuit detection system. The open circuit detection circuit is used for the detection device, the detection device comprises a first detection piece used for being in contact with a to-be-detected part, and the open circuit detection circuit is characterized by comprising a controller, a second detection piece and a detection loop; the first detection piece and the second detection piece are both connected in series with the detection loop, and the first detection piece and the second detection piece are used for enabling the to-be-detected part between the first detection piece and the second detection piece to be connected in series with the detection loop when the first detection piece and the second detection piece are in contact with the to-be-detected part; the detection device and / or the controller are / is used for outputting detection current to the detection loop, the controller is electrically connected with the detection loop, and the controller is used for determining whether the first detection piece is in contact with the to-be-detected part or not according to the detection current of the detection loop. By adopting the scheme, the problem that the detected product has the risk of missing detection is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a circuit breaker detection circuit and a circuit breaker detection system. Background Art

[0002] Many products need to be tested for voltage resistance and insulation performance during production. For example, the structural cover of the battery has positive and negative poles. The negative pole requires the pole and the cover to have good voltage resistance or insulation performance. Therefore, during battery production, a detection device is needed to detect the voltage resistance and insulation performance of the battery.

[0003] In the related art, during the test, the two detection pieces of the detection device need to contact the surfaces of the two parts to be tested of the product, and the detection device outputs voltage and detects the insulation resistance or withstand voltage current. When the detection data of the detection device is that the withstand voltage current is infinitely small or the insulation resistance is infinitely large, it means that the withstand voltage and insulation of the two parts to be tested are good.

[0004] However, when the detection device's detection piece does not contact the part to be tested on the product under test, the detected withstand voltage current is also infinitely small or the detected insulation resistance is also infinitely large, resulting in the product under test not being detected but being difficult for staff to find. Therefore, there is a risk of the detection device being short-circuited and causing the product under test to be missed. Utility Model Content

[0005] The utility model provides a circuit break detection circuit and a circuit break detection system to solve the problem of the risk of missed detection of the tested product.

[0006] According to one aspect of the utility model, there is provided a circuit breaker detection circuit for use in a detection device, the detection device comprising a first detection member for contacting a part to be detected, the circuit breaker detection circuit comprising a controller, a second detection member and a detection circuit;

[0007] The first detection member and the second detection member are both connected in series to the detection circuit, and the first detection member and the second detection member are used to connect the part to be detected between the first detection member and the second detection member in series to the detection circuit when they are in contact with the part to be detected;

[0008] The detection device and / or the controller are used to output a detection current to the detection circuit. The controller is electrically connected to the detection circuit. The controller is used to determine whether the first detection member is in contact with the part to be detected based on the detection current of the detection circuit.

[0009] In an optional embodiment of the present utility model, the controller includes a first output end and a first input end, the first output end is electrically connected to the first detection element, and the first input end is electrically connected to the second detection element;

[0010] The controller is used for determining that the first detection member contacts the part to be detected when the first input end receives the detection current.

[0011] In an optional embodiment of the present utility model, the controller is used to output a detection current to the detection circuit through the first output terminal;

[0012] Alternatively, the detection device is used to output a detection current to the detection circuit through the first detection component.

[0013] In an optional embodiment of the present utility model, the circuit break detection circuit further includes a switch module;

[0014] The switch module is used to control the on and off of the detection circuit.

[0015] In an optional embodiment of the present utility model, the switch module includes a solenoid valve, the solenoid valve includes a solenoid coil and a normally open switch contact, and the normally open switch contact is connected in series to the detection circuit;

[0016] One end of the electromagnetic coil is electrically connected to the first output end of the controller, and the other end of the electromagnetic coil is connected to the first input end of the controller. The electromagnetic coil is used to close the normally open switch contact when powered on.

[0017] In an optional embodiment of the present utility model, the number of the normally open switch contacts is two, one of the normally open switch contacts is connected in series between the first detection member and the first output terminal of the controller, and the other normally open switch contact is connected in series between the second detection member and the first input terminal of the controller.

[0018] In an optional embodiment of the present invention, the controller includes a PLC.

[0019] In an optional embodiment of the present utility model, the disconnection detection circuit further includes an alarm module, and the controller is electrically connected to the alarm module;

[0020] The controller is used to drive the alarm module to sound an alarm when the first detection member does not contact the part to be detected.

[0021] In an optional embodiment of the present utility model, the number of the first detection members is two, the two first detection members are used to detect different parts to be detected, and the two first detection members are electrically connected to the first output end of the controller;

[0022] The number of the detection circuits and the number of the second detection elements are both two, and they are connected to the two first detection elements in a one-to-one correspondence;

[0023] The controller further includes a second input terminal, one of the second detection components is connected to the first input terminal, and another of the second detection components is electrically connected to the second input terminal.

[0024] According to another aspect of the present invention, a circuit break detection system is provided. The circuit break detection system includes a detection device and the circuit break detection circuit described in any embodiment of the present invention.

[0025] The technical solution of the embodiment of the utility model is that the first detection member and the second detection member are connected in series to the detection circuit, and when the first detection member and the second detection member are used to contact the part to be detected, the part to be detected between the first detection member and the second detection member is connected in series to the detection circuit; the detection device and / or the controller are used to output a detection current to the detection circuit, and the controller is electrically connected to the detection circuit, so that the controller is used to determine whether the first detection member and the part to be detected are in contact according to the detection current of the detection circuit. Compared with the related art, when the first detection member of the detection device does not contact the part to be detected of the product to be detected, it will cause the product to be detected to be not detected but it is difficult for the staff to find it, and then there is a risk of the detection device being broken and causing the product to be missed. This solution can detect whether the first detection member and the part to be detected are in contact, thereby solving the problem of the risk of missed detection of the product to be detected.

[0026] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A circuit schematic diagram of a circuit break detection circuit, a detection device and a part to be detected provided in an embodiment of the utility model;

[0029] Figure 2 The utility model is provided in an embodiment of a controller and an alarm module connection block diagram.

[0030] Among them: 1. detection device; 11. first detection part; 12. detection body; 2. circuit break detection circuit; 21. controller; 211. first output terminal; 212. first input terminal; 213. second input terminal; 22. second detection part; 23. detection circuit; 24. switch module; 241. electromagnetic coil; 242. normally open switch contact; 25. alarm module; 3. part to be inspected; 31. battery cover; 32. pole. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] like Figure 1 As shown, an embodiment of the utility model provides a circuit break detection circuit 2, which is used for a detection device 1. The detection device 1 can be specifically a withstand voltage detector. The detection device 1 includes a first detection piece 11 for contacting a part to be tested 3. The first detection piece 11 is a component with a conductive function. In a specific embodiment, the first detection piece 11 is a metal probe.

[0034] The circuit breaker detection circuit 2 includes a controller 21, a second detection member 22 and a detection circuit 23; the second detection member 22 is a component with a conductive function, and in a specific embodiment, the second detection member 22 is a metal probe. The first detection member 11 and the second detection member 22 are both connected in series to the detection circuit 23, and the first detection member 11 and the second detection member 22 are used to connect the detection part 3 between the first detection member 11 and the second detection member 22 to the detection circuit 23 in series when they are in contact with the detection part 3; that is, when the detection device 1 performs a withstand voltage test, the first detection member 11 and the second detection member 22 will simultaneously contact the detection part 3 of the product to be detected, and at this time, the detection part 3 between the first detection member 11 and the second detection member 22 will be connected in series to the detection circuit 23.

[0035] The detection device 1 and / or the controller 21 are used to output the detection current to the detection circuit 23. The controller 21 is electrically connected to the detection circuit 23. The controller 21 is used to determine whether the first detection member 11 is in contact with the part to be detected 3 according to the detection current of the detection circuit 23. The controller 21 refers to a component with a logic control function. Preferably, the controller 21 includes one of an MCU and a PLC. In this embodiment, the controller 21 is specifically a PLC. Since the detection device 1 and / or the controller 21 will output the detection current to the detection circuit 23, when the first detection member 11 and the second detection member 22 both contact the inspected part 3 of the product to be detected, the inspected part 3 between the first detection member 11 and the second detection member 22 will be connected in series to the detection circuit 23, and the detection circuit 23 forms a complete circuit. The controller 21 can receive the detection current. When the first detection member 11 has poor contact with the inspected part 3 or does not contact the inspected part 3 or the line between the first detection member 11 and the detection device 1 is disconnected, the detection circuit 23 is open-circuited and the controller 21 cannot receive the detection current. Therefore, the controller 21 can determine whether the first detection member 11 is in contact with the inspected part 3 based on the detection current of the detection circuit 23.

[0036] The above scheme, by connecting the first detection member 11 and the second detection member 22 in series to the detection circuit 23, the first detection member 11 and the second detection member 22 are used to make the part 3 to be detected between the first detection member 11 and the second detection member 22 connected in series to the detection circuit 23 when they are in contact with the part to be detected 3; the detection device 1 and / or the controller 21 are used to output the detection current to the detection circuit 23, and the controller 21 is electrically connected to the detection circuit 23, so that the controller 21 is used to determine whether the first detection member 11 is in contact with the part to be detected 3 according to the detection current of the detection circuit 23. Compared with the related art, when the first detection member 11 of the detection device 1 does not contact the part to be detected 3 of the product to be detected, it will cause the product to be detected to be not detected but the staff will find it difficult to find, and then there is a risk of the detection device 1 being broken and causing the product to be missed, this scheme can detect whether the first detection member 11 is in contact with the part to be detected 3, thereby solving the problem of the risk of missed detection of the product to be detected.

[0037] In an optional embodiment of the present utility model, the controller 21 includes a first output terminal 211 and a first input terminal 212, the first output terminal 211 is electrically connected to the first detection member 11, and the first input terminal 212 is electrically connected to the second detection member 22; the controller 21 is used to determine that the first detection member 11 contacts the inspected part 3 when the first input terminal 212 receives a detection current.

[0038] Among them, when the first detection member 11 is in normal contact with the part to be inspected 3, the controller 21, the first detection member 11, the part to be inspected 3, and the second detection member 22 will form a complete detection circuit 23, so that the detection current in the detection circuit 23 will be transmitted to the first input terminal 212 of the controller 21, so the controller 21 can determine that the first detection member 11 is in contact with the part to be inspected 3 when the first input terminal 212 receives the detection current.

[0039] In an optional embodiment of the utility model, the detection current can be provided by the detection device 1 or by the controller 21. In this embodiment, the controller 21 is used to output the detection current to the detection circuit 23 through the first output terminal 211. Therefore, when the first detection member 11 is in normal contact with the part to be detected 3, the detection current output by the first output terminal 211 of the controller 21 will pass through the first detection member 11, the part to be detected 3, and the second detection member 22 and then flow back to the first input terminal 212 of the controller 21. Therefore, the controller 21 can determine that the first detection member 11 is in contact with the part to be detected 3 when the first input terminal 212 receives the detection current. When the first detection member 11 is in abnormal contact with the part to be detected 3, the first detection member 11 is disconnected from the part to be detected 3, so that the current output by the first output terminal 211 of the controller 21 cannot flow to the first input terminal 212 of the controller 21, and it can be determined that the first detection member 11 is in abnormal contact with the part to be detected 3 at this time.

[0040] In an optional embodiment of the present utility model, the detection device 1 is used to output a detection current to the detection circuit 23 through the first detection member 11. That is, the detection device 1 can output a detection current. When the first detection member 11 is in normal contact with the part to be detected 3, the detection current output by the detection device 1 through the first detection member 11 will pass through the part to be detected 3 and the second detection member 22 and then flow to the first input terminal 212 of the controller 21. Therefore, the controller 21 can determine that the first detection member 11 is in contact with the part to be detected 3 when the first input terminal 212 receives the detection current. When the first detection member 11 is in abnormal contact with the part to be detected 3, the first detection member 11 is disconnected from the part to be detected 3, so that the detection current flowing out of the first detection member 11 cannot flow to the first input terminal 212 of the controller 21, and it can be determined that the first detection member 11 is in abnormal contact with the part to be detected 3 at this time.

[0041] In an optional embodiment of the utility model, the circuit breaker detection circuit 2 further includes a switch module 24; the switch module 24 is used to control the on-off of the detection circuit 23. The switch module 24 refers to a module that can control the on-off of the circuit, so that when the detection device 1 is started for detection, the switch module 24 is first controlled to disconnect the detection circuit 23, so as to prevent the high voltage or high current output by the detection device 1 from being introduced into the controller 21 to cause damage to the controller 21, and also avoid the influence of the external circuit on the detection itself, so that the detection result is more real.

[0042] In an optional embodiment of the utility model, the switch module 24 includes a solenoid valve, which can be specifically a cylinder solenoid valve. The solenoid valve includes an electromagnetic coil 241 and a normally open switch contact 242, and the normally open switch contact 242 is connected in series to the detection circuit 23; one end of the electromagnetic coil 241 is electrically connected to the first output end 211 of the controller 21, and the other end of the electromagnetic coil 241 is connected to the first input end 212 of the controller 21, and the electromagnetic coil 241 is used to close the normally open switch contact 242 when power is turned on. Among them, since the normally open switch contact 242 is connected in series to the detection circuit 23, when the normally open switch contact 242 is disconnected, the detection circuit 23 is disconnected, so that when the detection device 1 is started for detection, the normally open switch contact 242 disconnects the detection circuit 23, preventing the high voltage or large current output by the detection device 1 from being introduced into the controller 21 to cause damage to the controller 21, and also avoiding the influence of the external circuit on the detection itself, so that the detection result is more real.

[0043] In addition, in this embodiment, the detection current is output by the first output terminal 211 of the controller 21, so when the controller 21 detects whether the first detection member 11 is in normal contact with the part to be inspected 3, the first output terminal 211 outputs the detection current. At this time, the electromagnetic coil 241 will be energized so that the normally open switch contact 242 is automatically closed, and then the controller 21 can detect whether the first detection member 11 is in normal contact with the part to be inspected 3 through the detection circuit 23, without the user having to perform additional operations, and is easy to use.

[0044] In an optional embodiment of the present utility model, the number of normally open switch contacts 242 is two, one normally open switch contact 242 is connected in series between the first detection member 11 and the first output terminal 211 of the controller 21, and the other normally open switch contact 242 is connected in series between the second detection member 22 and the first input terminal 212 of the controller 21. Therefore, when the normally open switch contact 242 is disconnected, the first output terminal 211 of the controller 21 is disconnected from the first detection member 11, and the first input terminal 212 is disconnected from the second detection member 22, thereby preventing the high voltage or high current output by the detection device 1 from being introduced into the controller 21 and causing damage to the controller 21.

[0045] In an optional embodiment of the present utility model, as Figure 2As shown, the circuit breaker detection circuit 2 also includes an alarm module 25, and the controller 21 is electrically connected to the alarm module 25; the controller 21 is used to drive the alarm module 25 to alarm when the first detection member 11 does not contact the part to be inspected 3. Among them, the alarm module 25 refers to a module that can alarm. In some embodiments, the alarm module 25 includes an LED, so that an alarm can be given by emitting light. In some embodiments, the alarm module 25 includes a buzzer, so that an alarm can be given by emitting sound. The specific composition of the alarm module 25 is not specifically limited here, but is only given as an example. The controller 21 sends a control electrical signal to the alarm module 25 when the first detection member 11 does not contact the part to be inspected 3, and the alarm module 25 alarms when it receives the control electrical signal. By setting the alarm module 25, it is possible to timely alarm when the first detection member 11 of the detection device 1 does not contact the part to be inspected 3, avoiding the staff from performing detection when the first detection member 11 does not contact the part to be inspected 3, resulting in inaccurate detection results, thereby improving the accuracy of the detection results.

[0046] In an optional embodiment of the present utility model, as Figure 1 As shown, there are two first detection members 11, and the two first detection members 11 are used to detect different parts to be inspected 3. The two first detection members 11 are both electrically connected to the first output terminal 211 of the controller 21; the number of detection circuits 23 and the number of second detection members 22 are both two, and they are connected to the two first detection members 11 in a one-to-one correspondence, that is, one first detection member 11 and one second detection member 22 are connected in series in one detection circuit 23, and another first detection member 11 and another second detection member 22 are connected in series in another detection circuit 23.

[0047] The controller 21 further includes a second input terminal 213, a second detection member 22 is connected to the first input terminal 212, and another second detection member 22 is electrically connected to the second input terminal 213. Therefore, the controller 21 can determine whether another first detection member 11 is in contact with the part to be detected 3 according to whether the second input terminal 213 obtains the detection current.

[0048] In the related art, the number of first detection members 11 of the detection device 1 is usually two, and the two first detection members 11 are in contact with different parts to be detected 3, and then the detection device 1 outputs voltage and detects insulation resistance or withstand voltage current to detect the withstand voltage performance and insulation performance of the two parts to be detected 3 in contact with the two first detection members 11. This solution can simultaneously detect the contact between the two first detection members 11 and the parts to be detected 3 by correspondingly setting two second detection members 22 and two detection circuits 23.

[0049] The detection principle of the present solution is described below with a specific embodiment: In this embodiment, the product to be inspected is a battery, and the two parts 3 of the battery to be inspected are the battery cover 31 and the pole 32 respectively.

[0050] When the circuit breaker detection circuit 2 in the present scheme does not exist, the detection device 1 includes a first detection member 11 and a detection body 12, one first detection member 11 contacts the battery cover 31, and the other first detection member 11 contacts the pole 32. The detection body 12 outputs a voltage and detects the insulation resistance or the withstand voltage current. When the insulation resistance approaches infinity and the withstand voltage current approaches infinitesimal, the detection device 1 will determine that the insulation performance and withstand voltage performance of the battery cover 31 and the pole 32 are qualified. When the first detection member 11 has poor contact or does not contact the battery cover 31 or the pole 32 at all, the insulation resistance detected by the detection device 1 approaches infinity, the withstand voltage current approaches infinitesimal, and the detection device 1 will still determine that the insulation performance and withstand voltage performance of the battery cover 31 and the pole 32 are qualified. When the line between the first detection member 11 and the detection body 12 is disconnected, the insulation resistance detected by the detection device 1 approaches infinity, the withstand voltage current approaches infinitesimal, and the detection device 1 will still determine that the insulation performance and withstand voltage performance of the battery cover 31 and the pole 32 are qualified.

[0051] When the circuit breaker detection circuit 2 in this solution exists, a second detection member 22 will contact the battery cover plate 31 at the same time as a first detection member 11, and another second detection member 22 will contact the pole 32 at the same time as another first detection member 11. The first output terminal 211 of the controller 21 will output the detection current. At this time, for the detection circuit 23 for detecting the battery cover plate 31, if the first detection member 11 is in good contact with the battery cover plate 31, the detection current will flow through the first detection member 11, the battery cover plate 31, and the second detection member 22 in sequence and return to the first input terminal 212 of the controller 21, so that the first input terminal 212 of the controller 21 can receive the detection current. Therefore, when the first input terminal 212 of the controller 21 receives the detection current, it is determined that the first detection member 11 and the battery cover plate 31 are in good contact. When the first input terminal 212 of the controller 21 does not receive the detection current, it is determined that the first detection member 11 and the battery cover plate 31 are in abnormal contact. When the first detection member 11 and the battery cover plate 31 are in abnormal contact, the controller 21 will drive the alarm module 25 to alarm.

[0052] As for the detection circuit 23 for detecting the pole 32, if the first detection member 11 is in good contact with the pole 32, the detection current will flow through the first detection member 11, the pole 32, and the second detection member 22 in sequence and return to the second input terminal 213 of the controller 21, so that the second input terminal 213 of the controller 21 can receive the detection current. Therefore, when the second input terminal 213 of the controller 21 receives the detection current, it is determined that the first detection member 11 and the pole 32 are in good contact, and when the second input terminal 213 of the controller 21 does not receive the detection current, it is determined that the first detection member 11 and the pole 32 are in abnormal contact. When the first detection member 11 and the pole 32 are in abnormal contact, the controller 21 will drive the alarm module 25 to alarm.

[0053] In summary, the circuit break detection circuit 2 can detect whether the first detection piece 11 is in contact with the part to be inspected 3, and can promptly give an alarm when the first detection piece 11 is in abnormal contact with the part to be inspected 3. Compared with the related art, when the first detection piece 11 of the detection device 1 does not contact the part to be inspected 3 of the product to be inspected, it will cause the product to be tested not to be detected but it is difficult for the staff to find it, which leads to the risk of missing the product to be tested due to the circuit breakage of the detection device 1. The present solution can detect whether the first detection piece 11 is in contact with the part to be inspected 3, thereby solving the problem of the risk of missing the product to be tested.

[0054] In an optional embodiment of the present utility model, a circuit breaker detection system is provided, such as Figure 1 As shown, the circuit break detection system includes a detection device 1 and a circuit break detection circuit 2 of any embodiment of the utility model. The detection device 1 refers to a device that can perform a withstand voltage test or an insulation test on the product to be tested. Preferably, the detection device 1 includes a withstand voltage tester.

[0055] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0056] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A circuit breaker detection circuit for use in a detection device, wherein the detection device comprises a first detection member for contacting a part to be detected, characterized in that: The circuit breaker detection circuit includes a controller, a second detection element and a detection loop; The first detection member and the second detection member are both connected in series to the detection circuit, and the first detection member and the second detection member are used to connect the part to be detected between the first detection member and the second detection member in series to the detection circuit when they are in contact with the part to be detected; The detection device and / or the controller are used to output a detection current to the detection circuit. The controller is electrically connected to the detection circuit. The controller is used to determine whether the first detection member is in contact with the part to be detected based on the detection current of the detection circuit.

2. The circuit break detection circuit according to claim 1, characterized in that: The controller comprises a first output end and a first input end, the first output end is electrically connected to the first detection element, and the first input end is electrically connected to the second detection element; The controller is used for determining that the first detection member contacts the part to be detected when the first input end receives the detection current.

3. The circuit break detection circuit according to claim 2, characterized in that: The controller is used to output the detection current to the detection circuit through the first output terminal; Alternatively, the detection device is used to output a detection current to the detection circuit through the first detection component.

4. The circuit break detection circuit according to claim 2, characterized in that: The circuit breaker detection circuit also includes a switch module; The switch module is used to control the on and off of the detection circuit.

5. The circuit break detection circuit according to claim 4, characterized in that: The switch module includes a solenoid valve, the solenoid valve includes a solenoid coil and a normally open switch contact, and the normally open switch contact is connected in series to the detection circuit; One end of the electromagnetic coil is electrically connected to the first output end of the controller, and the other end of the electromagnetic coil is connected to the first input end of the controller. The electromagnetic coil is used to close the normally open switch contact when powered on.

6. The disconnection detection circuit according to claim 5, characterized in that: The number of the normally open switch contacts is two, one of which is connected in series between the first detection member and the first output terminal of the controller, and the other of which is connected in series between the second detection member and the first input terminal of the controller.

7. The disconnection detection circuit according to any one of claims 1 to 6, characterized in that: The controller includes a PLC.

8. The disconnection detection circuit according to any one of claims 1 to 6, characterized in that: The circuit breaker detection circuit further includes an alarm module, and the controller is electrically connected to the alarm module; The controller is used to drive the alarm module to sound an alarm when the first detection member does not contact the part to be detected.

9. The disconnection detection circuit according to any one of claims 2 to 6, characterized in that: The number of the first detection members is two, the two first detection members are used to detect different parts to be detected, and the two first detection members are both electrically connected to the first output end of the controller; The number of the detection circuits and the number of the second detection elements are both two, and they are connected to the two first detection elements in a one-to-one correspondence; The controller further includes a second input terminal, one of the second detection components is connected to the first input terminal, and another of the second detection components is electrically connected to the second input terminal.

10. A circuit breaker detection system, characterized in that: The invention comprises a detection device and a circuit breaker detection circuit as claimed in any one of claims 1 to 9.

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