Outlet pressure plate voltage monitoring sensor and voltage monitoring system

Abstract

The invention relates to the technical field of power grid outlet pressing plate state monitoring, in particular to an outlet pressing plate voltage monitoring sensor, which comprises an upper shell assembly, a PCB (Printed Circuit Board), an FPC (Flexible Printed Circuit) and a shell assembly, the upper shell assembly is rotationally connected with the shell assembly, and when the upper shell assembly and the shell assembly are closed, a via hole used for circumferentially clamping a pressing plate connecting cable is formed between the upper shell assembly and the shell assembly; at least a partial area of the outer surface of the FPC flexible board is arranged on a via hole between the upper shell assembly and the shell assembly, and the inner surface of the FPC flexible board fits and wraps a pressing plate connecting cable passing through the via hole in a whole circle. The PCB is arranged in the shell assembly, and at least part of the inner surface of the FPC board extends out of the pins and is connected with the PCB in the shell assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of grid outlet pressure plate state monitoring, and more specifically, to an outlet pressure plate voltage monitoring sensor and a voltage monitoring system. Background Art

[0002] At present, most of the existing outlet pressure plate monitoring systems adopt the magnetic induction principle, and indirectly monitor the switching state of the outlet pressure plate by using the attitude change of the outlet pressure plate, so as to judge the switching state of the outlet pressure plate. Although the magnetic induction method can complete the basic monitoring of the outlet pressure plate state, due to the low accuracy of this scheme, it cannot identify the virtual connection state of the outlet pressure plate and is prone to misjudgment.

[0003] And the other practices for accurately judging the state of the outlet pressure plate before and after switching in the current substation are similar. Generally, on-site staff use meters such as multimeters to measure the voltage at the upper and lower ends of the outlet pressure plate, and judge the state of the outlet pressure plate according to the measured voltage values at the upper and lower ends of the outlet pressure plate. However, this operation method is likely to affect the normal operation of the secondary protection circuit, and also likely to affect the normal operation of the primary equipment, and is also likely to cause accidents.

[0004] There are also some existing market acquisition schemes that use vibration capacitors to monitor DC small-signal voltage data, but this scheme does not effectively solve the problems of installation and monitoring effect.

[0005] Therefore, it is necessary to propose an outlet pressure plate voltage monitoring sensor and a voltage monitoring system to solve the above problems. Summary of the Invention

[0006] The present invention provides an outlet pressure plate voltage monitoring sensor and a voltage monitoring system to overcome at least one of the above-mentioned defects (deficiencies) of the prior art.

[0007] To solve the above technical problems, the technical solution of the present invention is as follows: An outlet pressure plate voltage monitoring sensor and a voltage monitoring system, comprising an upper shell assembly, a PCB board, an FPC flexible board and a housing assembly;

[0008] The upper shell assembly is rotatably connected to the housing assembly. When the upper shell assembly and the housing assembly are closed, there is a through hole for circumferentially clamping the pressure plate connection cable between the upper shell assembly and the housing assembly;

[0009] At least a part of the outer surface of the FPC flexible board is arranged on the through hole between the upper shell assembly and the housing assembly, and the inner surface of the FPC flexible board integrally fits and wraps the pressure plate connection cable passing through the through hole;

[0010] The PCB board is arranged inside the housing assembly. At least part of the inner surface of the FPC flexible board extends out of the pins and is connected to the PCB board inside the housing assembly. By leaving a through hole between the upper housing assembly and the housing assembly for circumferentially clamping the pressure plate connection cable, it is convenient to clamp the entire circumference of the pressure plate connection cable. The outer surface of the FPC flexible board is arranged on the through hole between the upper housing assembly and the housing assembly, and the inner surface of the FPC flexible board wraps around the pressure plate connection cable passing through the through hole in a full circle. Such a setting enables the FPC flexible board to accurately judge the on / off state of the outlet pressure plate by sensing the electric field voltage generated by the pressure plate connection cable, and will not affect the normal operation of the secondary protection circuit, nor will it affect the normal operation of the primary equipment. During use, it can upload the voltage signal that the outlet pressure plate voltage monitoring sensor should have in the on / off state in real time and stably, and the voltage values at the upper and lower ends of the outlet pressure plate voltage monitoring sensor can be detected without manual operation, which is safe and efficient.

[0011] Further, the upper housing assembly includes an upper cover plate, an upper housing body, an upper pressing block, a first compression spring, a countersunk head screw, and a hook arranged on the upper housing body;

[0012] The upper cover plate is detachably arranged on the upper housing body through countersunk head screws;

[0013] A communication port is arranged on the upper housing body, and the upper pressing block is telescopically arranged on the communication port;

[0014] One end of the first compression spring is arranged on the upper pressing block, and the other end is pressed against the upper cover plate. Since the upper pressing block is telescopically arranged in the communication port of the upper housing body through the first compression spring, the pressure plate connection cable with a wire diameter ranging from φ2.0 to φ4.0 can be clamped. This wire diameter range almost covers all application cases of the grid outlet pressure plates, and the clamping is firm, and it can withstand the operating force within the allowable range of engineering construction, and the situation of the pressure plate connection cable slipping and disengaging will not occur during the clamping process. During use, the FPC flexible board judges the on / off state of the outlet pressure plate by sensing the electric field voltage generated by the pressure plate connection cable, which improves the detection accuracy and will not cause misjudgment due to the loose connection state of the outlet pressure plate.

[0015] Furthermore, both the upper cover plate and the upper pressing block are provided with protrusions or grooves for fixing the first compression spring. Through the setting of the protrusions and grooves, the first compression spring can be better fixed, and the phenomenon of the first compression spring shifting during use can be avoided.

[0016] Further, the housing assembly includes a housing, a bottom plate, an elastic plunger, a lower pressing block, a second compression spring, a support rib, and a sliding buckle;

[0017] The bottom plate is detachably arranged on the housing;

[0018] A receiving groove and a communication hole are respectively arranged in the housing. The second compression spring is arranged in the receiving groove. The sliding buckle passes through the communication hole and is pressed against the second compression spring. When the upper shell assembly is buckled with the housing assembly, the hook of the upper shell assembly is buckled on the sliding buckle of the housing assembly;

[0019] The PCB board is arranged in the housing through support ribs, and the lower pressing block is arranged in the housing;

[0020] One end of the elastic plunger is arranged on the bottom plate, and the other end is pressed against the bottom of the sliding buckle. Through the arrangement of the lower pressing block, it can cooperate with the upper pressing block to clamp the connecting cable of the pressing plate, making the clamping more firm. The sliding buckle can be buckled with the hook on the upper shell body, so as to ensure that the upper shell assembly can be better clamped on the housing of the housing assembly, and the elastic plunger plays a supporting role for the sliding buckle.

[0021] Furthermore, a guiding groove is arranged at the bottom of the sliding buckle. One end of the elastic plunger is arranged on the bottom plate, and the other end is pressed against the guiding groove at the bottom of the sliding buckle. Through the arrangement of the guiding groove, it can play a guiding role, that is, even if the sliding buckle moves in the housing under pressure, the bottom of the sliding buckle will be closely connected to the elastic plunger.

[0022] Further, a through hole for the hook to pass through is arranged on the lower pressing block. By arranging the through hole for the hook to pass through on the lower pressing block, the hook can be more conveniently fixed on the sliding buckle.

[0023] Furthermore, the inner surfaces of the housing and the bottom plate are both sprayed with a conductive paint layer. Through the arrangement of the conductive paint layer, it can effectively shield the interference of the external electromagnetic field on the induced voltage signal of the outlet pressing plate voltage monitoring sensor, and finally realize the stable output of the monitored voltage signal.

[0024] Further, an insulating layer is arranged on the outer surface of the FPC flexible board. A copper foil is attached to the inner surface of the FPC flexible board. The copper foil extends to the pins of the FPC flexible board. The pins of the FPC flexible board are connected to the PCB board to form an electrical circuit. Since the copper foil is arranged on the inner surface of the FPC flexible board, the FPC flexible board can be more stably connected to the PCB board.

[0025] Furthermore, the upper cover plate, the upper shell body, the upper pressing block, the housing, the bottom plate, the support ribs and the sliding buckle are all made of plastic materials. In practical applications, the upper cover plate, the upper shell body, the upper pressing block, the housing, the bottom plate, the support ribs and the sliding buckle can also be made of other insulating materials, which are all easy to think of by those skilled in the art.

[0026] In the present invention, a voltage monitoring system applying an outlet pressure plate voltage monitoring sensor is also disclosed, which includes a pressure plate, a signal transmission line, a signal concentrator, a signal aggregation line, and a signal host;

[0027] The pressure plate is connected to the outlet pressure plate voltage monitoring sensor through a pressure plate connection cable;

[0028] The PCB boards of multiple outlet pressure plate voltage monitoring sensors are connected to the signal concentrator through signal transmission lines, and the signal concentrator is connected to the signal host through a signal aggregation line. Through the setting of the signal concentrator, multiple outlet pressure plate voltage monitoring sensors can be detected simultaneously, which is simple and convenient.

[0029] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0030] For the outlet pressure plate voltage monitoring sensor disclosed in the present invention, a through hole for circumferentially clamping the pressure plate connection cable is provided between the upper shell assembly and the housing assembly, which facilitates circumferential clamping of the pressure plate connection cable. The outer surface of the FPC flexible board is disposed on the through hole between the upper shell assembly and the housing assembly, and the inner surface of the FPC flexible board wraps the pressure plate connection cable passing through the through hole in a whole circle. Such a setting enables the FPC flexible board to accurately judge the input / output state of the outlet pressure plate by sensing the electric field voltage generated by the pressure plate connection cable, and will not affect the normal operation of the secondary protection circuit or the normal operation of the primary equipment. During use, it can stably upload the voltage signal that the outlet pressure plate voltage monitoring sensor should have in the input / output state in real time, and the voltage values at the upper and lower ends of the outlet pressure plate voltage monitoring sensor can be detected without manual operation, which is safe and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the outlet pressure plate voltage monitoring sensor in the present invention when clamping the pressure plate connection cable.

[0032] Figure 2 is a schematic structural diagram of the outlet pressure plate voltage monitoring sensor in the present invention from another angle when clamping the pressure plate connection cable.

[0033] Figure 3 is a schematic structural diagram of the outlet pressure plate voltage monitoring sensor in the present invention when the upper shell assembly is opened.

[0034] Figure 4 is a schematic structural diagram of the outlet pressure plate voltage monitoring sensor in the present invention from another angle when the upper shell assembly is opened.

[0035] Figure 5It is a schematic structural diagram of the outlet pressure plate voltage monitoring sensor in the present invention when the upper shell assembly is buckled on the housing assembly.

[0036] Figure 6 It is a schematic structural diagram of the outlet pressure plate voltage monitoring sensor in the present invention after the upper cover plate is disassembled.

[0037] Figure 7 It is a schematic structural diagram of the upper cover plate in the present invention.

[0038] Figure 8 It is a schematic structural diagram of the upper shell assembly in the present invention.

[0039] Figure 9 It is a schematic structural diagram of the FPC flexible board arranged on the housing assembly in the present invention.

[0040] Figure 10 It is a schematic structural diagram of the housing assembly in the present invention.

[0041] Figure 11 It is a schematic cross-sectional structural diagram of the housing assembly in the present invention.

[0042] Figure 12 It is a schematic cross-sectional structural diagram of the housing assembly from another angle in the present invention.

[0043] Figure 13 It is a schematic cross-sectional structural diagram when the upper shell assembly is buckled with the housing assembly in the present invention.

[0044] Figure 14 It is a schematic structural diagram when the upper shell assembly is buckled with the housing assembly in the present invention.

[0045] Figure 15 It is a schematic structural principle diagram of the voltage monitoring system in the present invention.

[0046] Figure 16 It is a schematic structural diagram of the voltage monitoring system in the present invention.

[0047] In the figure, 1 is the upper shell assembly, 2 is the PCB board, 3 is the FPC flexible board, 4 is the housing assembly, 5 is the pressure plate connection cable, 6 is the via hole, 7 is the pin, 8 is the upper cover plate, 9 is the upper shell body, 10 is the upper pressing block, 11 is the first compression spring, 12 is the countersunk head screw, 13 is the buckle, 14 is the communication port, 15 is the convex block, 16 is the groove, 17 is the housing, 18 is the bottom plate, 19 is the elastic plunger, 20 is the lower pressing block, 21 is the second compression spring, 22 is the support rib, 23 is the sliding buckle, 24 is the receiving groove, 25 is the communication hole, 26 is the guide groove, 27 is the through hole, 28 is the conductive paint layer, 29 is the insulating layer, 30 is the copper foil, 31 is the pressure plate, 32 is the signal transmission line, 33 is the signal concentrator, 34 is the signal summary line, 35 is the signal host. Specific embodiments

[0048] The accompanying drawings are only for illustrative purposes and should not be construed as limiting the patent; for better illustration of this embodiment, some components in the drawings may be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0049] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0050] As Figures 1-5 shown, an outlet clamp voltage monitoring sensor includes an upper shell assembly 1, a PCB board 2, an FPC flexible board 3, and a housing assembly 4; the upper shell assembly 1 is rotatably connected to the housing assembly 4. When the upper shell assembly 1 and the housing assembly 4 are closed, a through hole 6 for circumferentially clamping the clamp connection cable 5 is provided between the upper shell assembly 1 and the housing assembly 4; at least part of the outer surface of the FPC flexible board 3 is disposed on the through hole 6 between the upper shell assembly 1 and the housing assembly 4, and the inner surface of the FPC flexible board 3 fits and wraps around the clamp connection cable 5 passing through the through hole 6 in a full circle; the PCB board 2 is disposed inside the housing assembly 4, and at least part of the inner surface of the FPC flexible board 3 extends out pins 7 and is connected to the PCB board 2 inside the housing assembly 4. By leaving a through hole 6 for circumferentially clamping the clamp connection cable 5 between the upper shell assembly 1 and the housing assembly 4, it is convenient to circumferentially clamp the entire clamp connection cable 5. And by disposing the outer surface of the FPC flexible board 3 on the through hole 6 between the upper shell assembly 1 and the housing assembly 4 and making the inner surface of the FPC flexible board 3 fit and wrap around the clamp connection cable 5 passing through the through hole 6 in a full circle, such a setting enables the FPC flexible board 3 to accurately judge the on / off state of the outlet clamp by sensing the electric field voltage generated by the clamp connection cable 5, and will not affect the normal operation of the secondary protection circuit, nor will it affect the normal operation of the primary equipment. During use, it can upload the voltage signals that the outlet clamp voltage monitoring sensor should have in the on / off state in real time and stably, and the voltage values at the upper and lower ends of the outlet clamp voltage monitoring sensor can be detected without manual operation, which is safe and efficient.

[0051] As Figures 6-8As shown, the upper shell assembly 1 includes an upper cover plate 8, an upper shell body 9, an upper pressing block 10, a first compression spring 11, a countersunk head screw 12, and a hook 13 provided on the upper shell body 9; the upper cover plate 8 is detachably provided on the upper shell body 9 through the countersunk head screw 12; a communication port 14 is provided on the upper shell body 9, and the upper pressing block 10 is telescopically provided on the communication port 14; one end of the first compression spring 11 is provided on the upper pressing block 10, and the other end is pressed against the upper cover plate 8. Since the upper pressing block 10 can be telescopically provided in the communication port 14 of the upper shell body 9 through the first compression spring 11, the pressing plate connecting cable 5 with a wire diameter range between φ2.0 and φ4.0 can be clamped. This wire diameter range almost covers all application cases of the outlet pressing plates of the power grid, and the clamping is firm, capable of withstanding the operating force within the allowable range of engineering construction, and the pressing plate connecting cable 5 will not slide or disengage during the clamping process. During use, the FPC flexible board 3 judges the on / off state of the outlet pressing plate by sensing the electric field voltage generated by the pressing plate connecting cable 5, improving the detection accuracy and preventing misjudgment caused by the loose connection state of the outlet pressing plate. Among them, bumps 15 or grooves 16 for fixing the first compression spring 11 are provided on both the upper cover plate 8 and the upper pressing block 10. Through the setting of the bumps 15 and grooves 16, the first compression spring 11 can be better fixed, avoiding the phenomenon of displacement of the first compression spring 11 during use.

[0052] As Figures 9-14As shown, the housing assembly 4 includes a housing 17, a bottom plate 18, an elastic plunger 19, a lower pressing block 20, a second compression spring 21, a support rib 22, and a sliding buckle 23; the bottom plate 18 is detachably arranged on the housing 17; a receiving groove 24 and a communication hole 25 are respectively arranged in the housing 17, the second compression spring 21 is arranged in the receiving groove 24, the sliding buckle 23 passes through the communication hole 25 and is pressed against the second compression spring 21. When the upper housing assembly 1 is buckled with the housing assembly 4, the hook 13 of the upper housing assembly 1 is buckled on the sliding buckle 23 of the housing assembly 4; the PCB board 2 is arranged in the housing 17 through the support rib 22, and the lower pressing block 20 is arranged in the housing 17; one end of the elastic plunger 19 is arranged on the bottom plate 18, and the other end is pressed against the bottom of the sliding buckle 23. Through the arrangement of the lower pressing block 20, it can cooperate with the upper pressing block 10 to clamp the pressure plate connecting cable 5, making it clamped more firmly. The sliding buckle 23 can be mutually buckled with the hook 13 on the upper housing body 9, so as to ensure that the upper housing assembly 1 can be better clamped on the housing 17 of the housing assembly 4, and the elastic plunger 19 plays a supporting role for the sliding buckle 23. In the present invention, a guiding groove 26 is arranged at the bottom of the sliding buckle 23, one end of the elastic plunger 19 is arranged on the bottom plate 18, and the other end is pressed against the guiding groove 26 at the bottom of the sliding buckle 23. Through the arrangement of the guiding groove 26, a guiding effect can be achieved, that is, even when the sliding buckle 23 moves in the housing 17 under pressing, the bottom of the sliding buckle 23 will be closely connected to the elastic plunger 19.

[0053] In the present invention, a through hole 27 for the hook 13 to pass through is arranged on the lower pressing block 20. By arranging the through hole 27 for the hook 13 to pass through on the lower pressing block 20, the hook 13 can be more conveniently fixed on the sliding buckle 23. In addition, conductive paint layers 28 are sprayed on the inner surfaces of the housing 17 and the bottom plate 18. Through the arrangement of the conductive paint layers 28, the interference of external electromagnetic fields on the induced voltage signal of the outlet pressure plate voltage monitoring sensor can be effectively shielded, and finally the monitored voltage signal can be stably output. In the present invention, an insulating layer 29 is arranged on the outer surface of the FPC flexible board 3, a copper foil 30 is attached to the inner surface of the FPC flexible board 3, the copper foil extends to the pin 7 of the FPC flexible board 3, and the pin 7 of the FPC flexible board 3 is connected to the PCB board 2 to form an electrical circuit. Since the copper foil 30 is arranged on the inner surface of the FPC flexible board 3, the FPC flexible board 3 can be more stably connected to the PCB board 2. Among them, the upper cover plate 8, the upper housing body 9, the upper pressing block 10, the housing 17, the bottom plate 18, the support rib 22, and the sliding buckle 23 are all made of plastic materials. In practical applications, the upper cover plate 8, the upper housing body 9, the upper pressing block 10, the housing 17, the bottom plate 18, the support rib 22, and the sliding buckle 23 can also be made of other insulating materials, which are all easily thought of by those skilled in the art.

[0054] AsFigures 15-16 As shown, in the present invention, a voltage monitoring system applying an outlet clamping plate voltage monitoring sensor is also disclosed, which includes a clamping plate 31, a signal transmission line 32, a signal concentrator 33, a signal aggregation line 34, and a signal host 35; the clamping plate 31 is connected to the outlet clamping plate voltage monitoring sensor through a clamping plate connection cable 5; the PCB boards 2 of multiple outlet clamping plate voltage monitoring sensors are connected to the signal concentrator 33 through the signal transmission line 32, and the signal concentrator 33 is connected to the signal host 35 through the signal aggregation line 34. Through the setting of the signal concentrator 33, multiple outlet clamping plate voltage monitoring sensors can be detected simultaneously, which is simple and convenient.

[0055] Embodiment

[0056] In this embodiment, the upper shell assembly is rotatably arranged on the housing assembly through a rotating shaft. Among them, a communication port is provided on the upper shell body, and the upper pressing block is telescopically arranged on the communication port. One end of the first compression spring is arranged on the upper pressing block, and the other end is pressed against the upper cover plate. Since the upper pressing block can be telescopically arranged in the communication port of the upper shell body through the first compression spring, the clamping plate connection cable with a wire diameter range between φ2.0 and φ4.0 can be clamped. This wire diameter range almost covers all application cases of the grid outlet clamping plates, and the clamping is firm, capable of withstanding the operating force within the allowable range of engineering construction, and the situation of the clamping plate connection cable sliding and disengaging will not occur during the clamping process. During use, the FPC flexible board judges the switching state of the outlet clamping plate by sensing the electric field voltage generated by the clamping plate connection cable, which improves the detection accuracy and will not cause misjudgment due to the virtual connection state of the outlet clamping plate.

[0057] In addition, in this embodiment, a receiving groove and a communication hole are respectively provided in the housing. The second compression spring is arranged in the receiving groove. The sliding buckle passes through the communication hole and is pressed against the second compression spring. When the upper shell assembly is buckled with the housing assembly, the hook of the upper shell assembly is buckled on the sliding buckle of the housing assembly. The PCB board is arranged in the housing through the support ribs. The lower pressing block is arranged in the housing. One end of the elastic plunger is arranged on the bottom plate, and the other end is pressed against the bottom of the sliding buckle. Through the setting of the lower pressing block, it can cooperate with the upper pressing block to clamp the clamping plate connection cable, making the clamping more firm. The sliding buckle can be mutually buckled with the hook on the upper shell body, so as to ensure that the upper shell assembly can be better clamped on the housing of the housing assembly, and the elastic plunger plays a supporting role for the sliding buckle.

[0058] When the outlet pressure plate is in the input state, the outlet pressure plate and its connection circuit are in a connected state, and a corresponding electric field will be generated around the pressure plate connection cable. The outlet pressure plate voltage monitoring sensor clamped on the pressure plate connection cable will sense a voltage signal representing a certain voltage value in the electric field generated by the pressure plate connection cable, thereby determining that the outlet pressure plate is in the input state.

[0059] When the outlet pressure plate is in the withdrawn state, the outlet pressure plate and its connection circuit are in a disconnected state, and no corresponding electric field will be generated around the pressure plate connection cable. Thus, the outlet pressure plate voltage monitoring sensor clamped on the outlet pressure plate cable will not sense a voltage signal, thereby determining that the outlet pressure plate is in the withdrawn state.

[0060] In addition, multiple pressure plate voltage monitoring sensors can also be used in cooperation with a signal concentrator and a signal host. Therefore, during use, only through a signal concentrator can the detection conditions of multiple pressure plate voltage monitoring sensors be collected, and then the collected information is transmitted to the signal host to summarize and process the detected conditions.

[0061] In the figure, the description of the positional relationship is only for illustrative purposes and should not be construed as a limitation of this patent; obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An outlet pressing plate voltage monitoring sensor, characterized in that: It includes an upper shell assembly, a PCB board, an FPC flexible board, and a housing assembly; The upper shell assembly is rotatably connected to the housing assembly. When the upper shell assembly and the housing assembly are closed, there are through holes for circumferentially clamping the pressure plate connection cable between the upper shell assembly and the housing assembly; At least part of the outer surface of the FPC flexible board is disposed on the through holes between the upper shell assembly and the housing assembly, and the inner surface of the FPC flexible board fits and wraps around the pressure plate connection cable passing through the through holes in a full circle; The PCB board is disposed inside the housing assembly, and at least part of the inner surface of the FPC flexible board extends pins and is connected to the PCB board inside the housing assembly.

2. The outlet pressing plate voltage monitoring sensor according to claim 1, wherein: The upper shell assembly includes an upper cover plate, an upper shell body, an upper pressing block, a first compression spring, a countersunk head screw, and a hook provided on the upper shell body; The upper cover plate is detachably disposed on the upper shell body through the countersunk head screw; There is a communication port on the upper shell body, and the upper pressing block is telescopically disposed on the communication port; One end of the first compression spring is disposed on the upper pressing block, and the other end is pressed against the upper cover plate.

3. The outlet pressure plate voltage monitoring sensor according to claim 2, characterized in that: Both the upper cover plate and the upper pressing block are provided with bumps or grooves for fixing the first compression spring.

4. The outlet press plate voltage monitoring sensor according to claim 2, wherein: The housing assembly includes a housing, a bottom plate, an elastic plunger, a lower pressing block, a second compression spring, a support rib, and a sliding buckle; The bottom plate is detachably disposed on the housing; A receiving groove and a communication hole are respectively provided inside the housing. The second compression spring is disposed in the receiving groove. The sliding buckle passes through the communication hole and is pressed against the second compression spring. When the upper shell assembly is buckled with the housing assembly, the hook of the upper shell assembly is buckled on the sliding buckle of the housing assembly; The PCB board is disposed inside the housing through the support rib, and the lower pressing block is disposed inside the housing; One end of the elastic plunger is disposed on the bottom plate, and the other end is pressed against the bottom of the sliding buckle.

5. The outlet pressing plate voltage monitoring sensor according to claim 4, characterized in that: A guiding groove is provided at the bottom of the sliding buckle. One end of the elastic plunger is disposed on the bottom plate, and the other end is pressed against the guiding groove at the bottom of the sliding buckle.

6. The outlet platen voltage monitoring sensor according to claim 4, wherein: A through hole for the hook to pass through is provided on the lower pressing block.

7. The outlet press plate voltage monitoring sensor according to claim 4, characterized in that: The inner surfaces of the housing and the bottom plate are both sprayed with a conductive paint layer.

8. The outlet pressing plate voltage monitoring sensor according to claim 1, characterized in that: The outer surface of the FPC flexible board is provided with an insulating layer. The inner surface of the FPC flexible board is attached with copper foil, and the copper foil extends to the pins of the FPC flexible board. The pins of the FPC flexible board are connected to the PCB board to form an electrical circuit.

9. The outlet pressure plate voltage monitoring sensor according to claim 4, wherein: The upper cover plate, the upper shell body, the upper pressing block, the housing, the bottom plate, the support rib, and the sliding buckle are all made of plastic materials.

10. A voltage monitoring system for an outlet pressure plate voltage monitoring sensor according to any one of claims 1-9, including a pressure plate, a signal transmission line, a signal concentrator, a signal aggregation line, and a signal host, characterized in that: The pressure plate is connected to the outlet pressure plate voltage monitoring sensor through a pressure plate connection cable; The PCB boards of multiple outlet pressure plate voltage monitoring sensors are connected to the signal concentrator through signal transmission lines, and the signal concentrator is connected to the signal host through a signal aggregation line.

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