Hard pressure plate voltage monitoring device and hard pressure plate voltage monitoring system

Abstract

The present invention provides a hard pressing plate voltage monitoring device and a hard pressing plate voltage monitoring system. Among them, the insulating protective shell includes a protection measurement port opened on its bottom end face, and a moving shielding component that moves horizontally on its bottom end face; the cable shielding member is assembled on the bottom end face of the insulating protective shell. A part of the cable shielding member passes through the protection measurement port and is connected to the shielding housing, and at least a part of the protection measurement port is blocked. Among them, the cable shielding member further includes a protruding structure b extending to a position below it; when the moving shielding component moves and blocks the cable shielding member, and at least a part of it contacts the protruding structure b, the moving shielding component forms a part of the shielding cavity. The present invention can simplify the connection and conduction method between the cable shielding member and the shielding main body, improve the connection and conduction performance between the cable shielding member and the shielding main body, and enhance the shielding performance against interference signals in the external environment.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid hard pressure plate state detection, in particular to a hard pressure plate voltage monitoring device and a hard pressure plate voltage monitoring system. Background Art

[0002] Since the development of smart grid, the automation level of substations has greatly improved the efficiency and safety of power grid operation. The hard pressure plate as a secondary equipment operation is the hub for the distribution network protection and automation devices to connect to the outside. Therefore, the activation and deactivation status of the hard pressure plate is a breakpoint artificially created in the protection tripping circuit. This breakpoint directly affects whether the protection function and action output can function normally, providing protection for maintenance and power safety. The hard pressure plate is used to activate or deactivate the corresponding protection function. The management of the hard pressure plate of the relay protection device requires the responsibility of designated personnel. In the operation of the smart grid, when the state of the hard pressure plate changes, it causes the relay protection device to refuse to operate or malfunction, which will seriously affect the safe and reliable operation of the power equipment.

[0003] According to the substation operation regulations, the voltage between the two ends of the hard pressure plate and the ground needs to be measured before the hard pressure plate is put into use to prevent the relay protection device from refusing to operate or malfunctioning. At present, the traditional voltage measurement is manually operated, usually using a multimeter, which is prone to the multimeter's gear error, causing the control circuit to be turned on and causing a tripping accident.

[0004] like Figure 1 As shown, in the invention patent with publication number CN117452050A, a hard pressure plate voltage monitoring device, system and method are disclosed, which include an insulating protective shell, a measuring circuit board and a shielding shell, wherein the measuring circuit board is placed inside the shielding shell and is grounded to the shielding shell. The insulating protective shell is sleeved on the outside of the shielding shell to protect the shielding shell, and corresponding cable measuring holes are formed on the insulating protective shell and the shielding shell, and a cable of the hard pressure plate outlet is arranged in the cable measuring hole, and the measuring circuit board is used to measure the voltage of the hard pressure plate according to the electric field generated by the cable of the hard pressure plate outlet.

[0005] The insulating protective shell includes a protective upper cover 1', a protective body 2' and a protective side cover 3', and the shielding shell includes a circuit board shielding body 5', a circuit board shielding upper cover 6', a cable shielding member 4' and a shielding connector 7'. The cable shielding member 4' is fixed in the protective side cover 3', and the protective side cover 3' is connected to the insulating protective shell 5' through a rotating shaft 31' and a rotating port 22', a snap protrusion 23' and a snap fixing port 32'. The shielding connector 7' is fixed on the protective body 2' and is connected to the circuit board shielding body 5' by welding. After the protective side cover 3' is rotated and fixed to the protective body 2', the cable shielding member 4' can be charged through the contact between the cable shielding member 4' and the shielding connector 7' to achieve the shielding function.

[0006] However, the cable shielding part 4' is connected and conducted with the circuit board shielding body 5' through the rotating shaft 31' and the rotating mouth 22', the snap protrusion 23' and the snap fixing mouth 32', and the shielding connector 7', which makes the connection and conduction method between the cable shielding part 4' and the circuit board shielding body 5' too complicated. In addition, the cable shielding part 4' is connected to the circuit board shielding body 5' through the shielding connector 7', and there is also a situation where the connection and conduction performance of the cable shielding part 4' and the circuit board shielding body 5' is unstable, which affects the shielding performance.

[0007] Therefore, how to solve the problem that the connection and conduction method between the cable shielding member 4 ′ and the circuit board shielding body 5 ′ is too complicated and the connection and conduction performance is unstable is a technical problem that needs to be solved urgently. Summary of the invention

[0008] In response to the shortcomings existing in the above-mentioned problems, the present invention provides a hard pressure plate voltage monitoring device and a hard pressure plate voltage monitoring system which can simplify the connection and conduction method between the cable shielding part and the shielding body, improve the connection and conduction performance between the cable shielding part and the shielding body, and enhance the shielding performance against interference signals in the external environment.

[0009] To achieve the above-mentioned purpose, in a first aspect, the present invention provides a hard pressure plate voltage monitoring device, comprising an insulating protective shell, a shielding shell, a cable shielding member and a measuring assembly, wherein the measuring assembly and the shielding shell are sequentially placed inside the insulating protective shell, and the insulating protective shell comprises a protective measuring port opened on its bottom end surface, and a movable shielding assembly moving along the horizontal direction on its bottom end surface;

[0010] The cable shielding member is mounted on the bottom end surface of the insulating protective shell, a portion of the cable shielding member passes through the protective measuring port and is connected to the shielding shell, and shields at least a portion of the protective measuring port, wherein the cable shielding member further includes a protruding structure b extending to a position below the cable shielding member;

[0011] When the movable shielding assembly moves and shields the cable shielding member, and at least a portion thereof contacts the protruding structure b, the movable shielding assembly forms a portion of the shielding cavity.

[0012] In one of the embodiments, a measuring port corresponding to the protective measuring port is opened on the bottom end surface of the shielding shell, and a first shielding member for shielding a portion of the inner wall surface of the protective measuring port is provided at the edge of the measuring port;

[0013] The cable shielding member includes a measurement through-hole, and an upper end portion and a lower end portion connected to each other. After the upper end portion penetrates through the protection measurement port, at least a part of it is connected to the shielding housing, forming a second shielding member that blocks a partial area of the inner wall surface of the protection measurement port. The lower end portion forms a third shielding member that covers and blocks the bottom end face of the protection measurement port;

[0014] When the movable shielding assembly moves to block the cable shielding member and at least a part of it contacts the protruding structure b, the first shielding member, the second shielding member, the third shielding member and the movable plate shielding member form the shielding cavity.

[0015] In one embodiment, the first shielding member includes a first lower extension plate, a second lower extension plate, a third lower extension plate and a fourth lower extension plate connected to the edge of the measurement port. The position of the first lower extension plate corresponds to the position of the second lower extension plate, and the position of the third lower extension plate corresponds to the position of the fourth lower extension plate. Among them, the second lower extension plate and the third lower extension plate are arranged at intervals and are connected to the same edge of the measurement port along the same axis. The first lower extension plate and the fourth lower extension plate are arranged at intervals and are connected to the same edge of the measurement port along the same axis.

[0016] In one embodiment, the upper end portion includes a first upper extension plate, a second upper extension plate, a first bending plate and a second bending plate that penetrate through the protection measurement port. The first upper extension plate and / or the second upper extension plate are connected to the edge of the measurement port. The top end faces of the first bending plate and the second bending plate are both abutted against the bottom end face of the shielding housing;

[0017] The lower end portion includes a first front panel, a first rear panel and a second rear panel. The end of the first upper extension plate, the front ends of the first bending plate and the second bending plate are all connected to the first front panel. The rear ends of the first bending plate and the second bending plate are both connected to the first rear panel. The second upper extension plate is connected to the first rear panel through the second rear panel;

[0018] The measurement through-hole is located on the lower end portion, and the measurement through-hole is communicated with the protection measurement port and the measurement port to form a cable measurement hole.

[0019] In one embodiment, the first bent plate includes a first front plate, a first top plate, and a first rear plate connected in sequence. The first front plate and the first rear plate are bent towards the position of the shielding housing, such that the first top plate is located above the first front plate, the first rear plate, and the lower portion. The first front plate, the first top plate, and the first rear plate enclose a first groove region;

[0020] The second bent plate includes a second front plate, a second top plate, and a second rear plate connected in sequence. The second front plate and the second rear plate are bent towards the position of the shielding main body, such that the second top plate is located above the second front plate, the second rear plate, and the lower portion. The second front plate, the second top plate, and the second rear plate enclose a second groove region.

[0021] In one embodiment, the front end of the second rear panel inclines towards the lower region of the second rear panel, such that the second rear panel forms an inclined panel;

[0022] The end of the second upper extension plate is connected to the front end of the second rear panel, such that the second upper extension plate and the second rear panel form the protruding structure b.

[0023] In one embodiment, the protection measurement port includes a first wall surface adjacent to the front wall plate of the insulating protection shell, a second wall surface adjacent to the rear wall plate of the insulating protection shell, and an opening region located between the first wall surface and the second wall surface;

[0024] The first shielding member shields a first portion of the first wall surface and a first portion of the second wall surface, and the second shielding member shields a second portion of the first wall surface and a second portion of the second wall surface;

[0025] The opening region includes a connected opening region a, opening region b, and opening region c. The opening region a is respectively in communication with the measurement port and the measurement through hole.

[0026] In one embodiment, the first wall surface includes a first front wall surface, a first side wall surface, a second front wall surface, a second side wall surface, and a third front wall surface connected in sequence, and the second wall surface includes a first rear wall surface, a third side wall surface, a second rear wall surface, a fourth side wall surface, and a third rear wall surface connected in sequence;

[0027] Among them, the first front wall surface corresponds to the first rear wall surface to form two wall surfaces of the opening area b, the connected first side wall surface, the second front wall surface and the second side wall surface, and the connected third side wall surface, the second rear wall surface and the fourth side wall surface respectively form two corresponding wall surfaces of the opening area a, and the third front wall surface corresponds to the third rear wall surface to form two wall surfaces of the opening area c.

[0028] In one embodiment, the protection measurement port further includes a first inner wall surface, a second inner wall surface and a third inner wall surface. The end of the third inner wall surface is connected to the second inner wall surface, and the front end of the third inner wall surface is connected to the second rear wall surface. After the lower end of the second rear wall surface extends to the lower area of the bottom end surface of the insulation protection shell, at least a part of the protruding structure a protruding from the second inner wall surface is formed.

[0029] In one embodiment, a first slide rail and a second slide rail are arranged in parallel on the bottom end surface of the insulation protection shell, where:

[0030] The bottom end surfaces of the first slide rail and the second slide rail both protrude from the bottom end surface of the insulation protection shell. The outer wall surface of the first slide rail is connected to the outer wall surface of the first side plate of the insulation protection shell and they are in the same plane. The outer wall surface of the second slide rail is connected to the outer wall surface of the second side plate of the insulation protection shell and they are in the same plane;

[0031] The moving shielding assembly moves horizontally on the bottom end surface of the insulation protection shell through the first slide rail and the second slide rail. When the moving shielding assembly moves and blocks the cable shielding member, at least a part of the moving shielding assembly contacts the protruding structure b, and the moving plate shielding member is charged to achieve the shielding function.

[0032] In one embodiment, a partial area of the first slide rail is recessed towards the top end surface of the first side plate to form a first cable groove, and a partial area of the second slide rail is recessed towards the top end surface of the second side plate to form a second cable groove, where:

[0033] The first cable groove communicates with the opening area b, and the second cable groove communicates with the opening area c.

[0034] In one embodiment, the moving shielding assembly includes a moving plate and a moving plate shielding member, where:

[0035] The moving plate moves horizontally on the bottom end surface of the insulation protection shell through the first slide rail and the second slide rail to block the cable shielding member, the first cable groove and the second cable groove;

[0036] The moving plate shield is arranged on the top end face of the moving plate and faces the cable shield. When the moving plate moves to block the cable shield, at least a part of the moving plate shield contacts the protruding structure b, and the moving plate shield is charged to achieve the shielding function.

[0037] In a second aspect, the present invention also provides a hard pressing plate voltage monitoring system, including the above-mentioned hard pressing plate voltage monitoring device and a collector, and the collector is connected to the hard pressing plate voltage monitoring device through a shielded wire;

[0038] The hard pressing plate voltage monitoring device is used to output a voltage analog signal of the cable at the outlet of the hard pressing plate;

[0039] The collector is used to obtain the on / off state of the hard pressing plate according to the voltage analog signal.

[0040] Compared with the prior art, the present invention has one of the following advantages:

[0041] After the cable shield is assembled on the insulating protective shell, a part of the cable shield penetrates through the protective measurement port and is directly connected to the shielded housing. Compared with the prior art, there is no need to set up a shield connection part, which can simplify the connection and conduction method between the cable shield and the shield main body, improve the connection and conduction performance between the cable shield and the shield main body, and ensure the shielding performance against interference signals in the external environment;

[0042] When the moving plate shield moves to block the cable shield, it contacts the protruding structure b, making the moving plate shield charged, which can further enhance the shielding performance against interference signals in the external environment;

[0043] A shielding cavity can be formed by the first shield, the second shield, the third shield and the moving plate shield. When the measurement end of the cable is placed inside the shielding cavity, the shielding performance against interference signals in the external environment can be enhanced, the accuracy of voltage measurement can be improved, and the on / off state of the hard pressing plate can be obtained;

[0044] The moving plate uses a sliding method to block the cable measurement hole, which is easier to adjust the state of the cable measurement hole. Compared with the prior art in which the protective side cover is connected to the insulating protective shell through a rotating shaft and a rotating port, a snap protrusion and a snap fixing port, the connection method between the moving plate and the protection main body can be simplified, and the connection performance between the moving plate and the protection main body can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is an exploded view of the existing hard pressing plate voltage monitoring device;

[0046] Figure 2It is the first state diagram of the hard pressure plate voltage monitoring device in the present invention;

[0047] Figure 3 It is the second state diagram of the hard pressure plate voltage monitoring device in the present invention;

[0048] Figure 4 is Figure 3 exploded view;

[0049] Figure 5 is Figure 3 exploded view from another perspective;

[0050] Figure 6 It is the connection diagram of the shielding main body and the cable shielding part in the present invention;

[0051] Figure 7 is Figure 6 enlarged view of part A in

[0052] Figure 8 is Figure 6 cross-sectional view;

[0053] Figure 9 is Figure 8 enlarged view of part B in

[0054] Figure 10 is Figure 6 exploded view;

[0055] Figure 11 It is the structure diagram of the cable shielding part in the present invention;

[0056] Figure 12 It is the structure diagram of the cable shielding part from another perspective in the present invention;

[0057] Figure 13 It is the state diagram of the connection between the hard pressure plate voltage monitoring device and the cable in the present invention;

[0058] Figure 14 is Figure 13 cross-sectional view;

[0059] Figure 15 is Figure 14 enlarged view of part C in

[0060] Figure 16 It is the structure diagram of the protection main body in the present invention;

[0061] Figure 17 It is the partial structure diagram of the protection main body in the present invention;

[0062] Figure 18 It is the structure diagram of the hard pressure plate voltage monitoring system in the present invention;

[0063] Figure 19It is a flowchart of the hard pressure plate voltage monitoring method in the present invention;

[0064] Figure 20 It is a voltage waveform diagram in the hard pressure plate voltage monitoring method of the present invention.

[0065] The main reference numerals are as follows:

[0066] 1` - Protection upper cover; 2` - Protection main body; 21` - Protection measurement port; 22` - Rotation port; 23` - Snap protrusion;

[0067] 3` - Protection side cover; 31` - Rotation shaft; 32` - Snap fixing port; 4` - Cable shield; 5` - Shield main body; 51` - Measurement port; 6` - Shield upper cover; 7` - Shield connecting piece;

[0068] 1 - Protection upper cover; 101 - Snap protrusion;

[0069] 2 - Protection main body; 21 - Protection measurement port; 211 - First side wall surface; 212 - Second side wall surface; 213 - Third side wall surface; 214 - Fourth side wall surface; 215 - First inner wall surface; 216 - Second inner wall surface; 217 - Opening area a; 218 - Opening area b; 219 - Opening area c; 220 - First front wall surface; 221 - Second front wall surface; 222 - Third front wall surface; 223 - First rear wall surface; 224 - Second rear wall surface; 225 - Third inner wall surface; 226 - Third rear wall surface; 22 - First cable groove; 23 - First slide rail; 24 - Second slide rail; 241 - Limit protrusion; 25 - Snap fixing port; 27 - Protection main body bottom plate; 28 - First side plate; 29 - Second side plate; 210 - Front wall plate; 2101 - Front card slot; 2110 - Shielded wire through hole; 2111 - Rear wall plate; 2112 - Second cable groove;

[0070] 3 - Moving plate; 31 - First chute; 32 - Second chute; 33 - Front snap; 34 - Upper groove;

[0071] 4 - Moving plate shield;

[0072] 5 - Shield main body; 51 - Measurement port; 52 - Shield main body bottom plate; 521 - First lower extension plate; 522 - Second lower extension plate; 523 - Third lower extension plate; 524 - Fourth lower extension plate;

[0073] 6 - Shield upper cover;

[0074] 7 - Cable shield; 71 - First groove area; 711 - First front plate; 712 - First top plate; 713 - First rear plate; 72 - Second groove area; 721 - Second front plate; 722 - Second top plate; 723 - Second rear plate; 73 - First upper extension plate; 74 - Second upper extension plate; 75 - First front panel; 76 - First rear panel; 77 - Second rear panel; 78 - Measurement through - hole;

[0075] 8 - Cable; 9 - Shielded wire; 10 - Hard - pressure - plate voltage monitoring device; 11 - Collector; 12 - Probe connection aviation plug; 13 - Communication aviation plug. Detailed implementation mode

[0076] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0077] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "top surface", "bottom surface", "inside", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0078] Embodiment 1

[0079] As Figures 2 to 17 shown, this embodiment provides a hard - pressure - plate voltage monitoring device, including an insulating protective shell, a measurement component and a shielding shell. The measurement component is placed inside the shielding shell and is grounded to the shielding shell. The insulating protective shell is sleeved outside the shielding shell to protect the shielding shell. Corresponding cable measurement holes (i.e., corresponding measurement ports 51, protection measurement ports 21 and measurement through - hole 78) are formed on the insulating protective shell and the shielding shell. When a cable 8 with a hard - pressure - plate outlet is arranged in the cable measurement hole, the voltage of the measurement end of the cable 8 can be detected through the measurement component, so as to measure the voltage of the hard - pressure - plate according to the electric field generated by the cable 8 at the hard - pressure - plate outlet.

[0080] The insulating protective case can be made of nylon, ABS plastic, ASA plastic and other insulating materials, which is used to protect the shielding case and avoid accidental contact with electricity when measuring the voltage of the cable 8 at the outlet of the hard pressure plate, ensuring the safe use of the hard pressure plate voltage monitoring device.

[0081] The shielding case can be made of metal material. After the shielding case is grounded and connected to the measuring component, the shielding case can shield the interference signals in the external environment, making the measurement of the cable 8 at the outlet of the hard pressure plate by the measuring component more accurate.

[0082] The measuring component can adopt a vibrating capacitive electric field sensor, a rotating vane electric field sensor, a piezoelectric film electric field sensor, a micro-electro-mechanical system (MEMS) electric field sensor, a direct induction electric field sensor, etc., which can measure the voltage through the electric field of the cable 8.

[0083] In this embodiment, specifically, the insulating protective case includes a protective upper cover 1, a protective main body 2 and a moving plate 3. Among them, the protective main body 2 is a rectangular case with an open top. A protective measurement port 21 is opened on the bottom end surface of the protective main body 2, and the protective upper cover 1 covers the open top of the protective main body 2. The moving plate 3 is located on the bottom end surface of the protective main body 2 and can move from the first position on the bottom end surface of the protective main body 2 to the second position. When the moving plate 3 moves to the first position, it is located at the bottom end of the protective measurement port 21 to block the protective measurement port 21.

[0084] Furthermore, a snap protrusion 101 is provided on the protective upper cover 1. Snap fixing ports 25 that are in the same position as and cooperate with the snap protrusion 101 are opened on both the first side wall surface 211 and the second side wall surface 212 of the protective main body 2. A shielded wire through hole 2110 is also opened on the rear wall plate 2111 of the protective main body 2.

[0085] Furthermore, the protective main body 2 includes a front wall plate 210, a first side plate 28, a second side plate 29, a rear wall plate 2111 and a protective main body bottom plate 27. The bottom end surface of the front wall plate 210 extends downward below the protective main body bottom plate 27 to form a front wall plate extension end, and a front card slot 2101 is formed in a partial area on the bottom end surface of the front wall plate extension end. The protective measurement port 21 is located on the protective main body bottom plate 27, penetrates through its interior, and corresponds to the acquisition end of the measuring component. First slide rails 23 and second slide rails 24 are also provided in parallel on the protective main body bottom plate 27. Among them, the bottom end surfaces of both the first slide rail 23 and the second slide rail 24 protrude from the protective main body bottom plate 27. The outer side wall surface of the first slide rail 23 is connected to the outer side wall surface of the first side plate 28 and they are in the same plane. The outer side wall surface of the second slide rail 24 is connected to the outer side wall surface of the second side plate 29 and they are in the same plane.

[0086] Further, the bottom end face of the extended end of the front wall panel is located below the bottom end faces of the first slide rail 23 and the second slide rail 24.

[0087] Further, a front card slot 2101 corresponding to the area between the first slide rail 23 and the second slide rail 24 is further formed on a partial area of the bottom end face of the extended end of the front wall panel.

[0088] In this embodiment, the position of the protection measurement port 21 is close to the front wall panel 210, and it includes a first inner wall surface 215, a second inner wall surface 216, a third inner wall surface 225, an opening area, a first front wall surface 220, a first side wall surface 211, a second front wall surface 221, a second side wall surface 212, a third front wall surface 222, a first rear wall surface 223, a third side wall surface 213, a second rear wall surface 224, a fourth side wall surface 214, and a third rear wall surface 226.

[0089] Further, the end of the third inner wall surface 225 is connected to the second inner wall surface 216, the front end of the third inner wall surface 225 is connected to the second rear wall surface 224. After the lower end of the second rear wall surface 224 extends to the lower area of the protection main body bottom plate 27, a protruding structure a that protrudes at least partially from the second inner wall surface 216 is formed. Among them, the protruding structure a includes an inclined surface with a higher rear and a lower front (i.e., the third inner wall surface 225).

[0090] Further, among the first front wall surface 220, the second front wall surface 221, and the third front wall surface 222, the first front wall surface 220 and the third front wall surface 222 are substantially in the same plane, the second front wall surface 221 is in a different plane from the first front wall surface 220 and the third front wall surface 222, and is closer to the front wall panel 210 than the first front wall surface 220 and the third front wall surface 222. Among the first rear wall surface 223, the second rear wall surface 224, and the third rear wall surface 226, the first rear wall surface 223 and the third rear wall surface 226 are substantially in the same plane, the second rear wall surface 224 is in a different plane from the first rear wall surface 223 and the third rear wall surface 226, and is closer to the rear wall panel 2111 than the first rear wall surface 223 and the third rear wall surface 226.

[0091] Further, the first front wall surface 220, the first side wall surface 211, the second front wall surface 221, the second side wall surface 212, and the third front wall surface 222 connected in sequence form the first wall surface of the opening area, and the first rear wall surface 223, the third side wall surface 213, the second rear wall surface 224, the fourth side wall surface 214, and the third rear wall surface 226 connected in sequence form the second wall surface of the opening area.

[0092] Further, the opening area includes a connected opening area a217, an opening area b218, and an opening area c219. The first front wall surface 220 corresponds to the first rear wall surface 223 to form two inner wall surfaces of the opening area b218. The first side wall surface 211 corresponds to the second side wall surface 212, and the third side wall surface 213 corresponds to the fourth side wall surface 214. The first side wall surface 211 and the third side wall surface 213 are in the same plane, and the second side wall surface 212 and the fourth side wall surface 214 are in the same plane. The connected first side wall surface 211, the second front wall surface 221, and the second side wall surface 212, and the connected third side wall surface 213, the second rear wall surface 224, and the fourth side wall surface 214 respectively form two wall surfaces of the opening area a217. The third front wall surface 222 corresponds to the third rear wall surface 226 to form two inner wall surfaces of the opening area c219.

[0093] In this embodiment, a first cable groove 22 and a second cable groove 2112 with corresponding positions are further provided on the bottom end surface of the first slide rail 23 and the bottom end surface of the second slide rail 24. Among them, the first cable groove 22 is formed by being recessed from the bottom end surface of the first slide rail 23 towards the top end surface of the first side plate 28, and the second cable groove 2112 is formed by being recessed from the bottom end surface of the second slide rail 24 towards the top end surface of the second side plate 29.

[0094] Further, the internal area of the first cable groove 22 is communicated with the internal area of the opening area c219, and the internal area of the second cable groove 2112 is communicated with the internal area of the opening area b218, so that the first cable groove 22 is communicated with the second cable groove 2112 through the opening area c219, the opening area a217, and the opening area b218.

[0095] In this embodiment, the protection main body bottom plate 27 includes a planar area near the rear wall plate 2111 and a recessed area near the front wall plate 210. Among them, the protection measurement port 21 is located in the recessed area, and the lowermost end of the third inner wall surface 225 is approximately in the same plane as the bottom end surface of the planar area.

[0096] In this embodiment, a limiting protrusion 241 is included in the first slide rail 23 and / or the second slide rail 24. When the moving plate 3 is arranged on the bottom end surface of the protection main body 2 through the first slide rail 23 and the second slide rail 24, the moving position of the moving plate 3 can be limited by the limiting protrusion 241 to prevent the moving plate 3 from separating from the protection main body 2.

[0097] In this embodiment, a first chute 31 that cooperates with the first slide rail 23, a second chute 32 that cooperates with the second slide rail 24, a front buckle 33 that cooperates with the front card slot 2101, and an upper groove 34 formed on the top end surface of the push plate are provided on the moving plate 3.

[0098] Furthermore, the moving plate 3 can move on the bottom end surface of the protection body 2 through the cooperating first slide rail 23 and first chute 31, and the cooperating second slide rail 24 and second chute 32. When the moving plate 3 moves forward so that the front end surface of the moving plate 3 contacts the rear end surface of the extended end of the front wall plate, and the moving plate 3 is located in the lower area of the protection measurement port 21, the moving plate 3 moves to the first position. At this time, the protection measurement port 21, the first cable groove 22, and the second cable groove 2112 are in an occluded state. When the moving plate 3 moves backward so that the front end surface of the moving plate 3 moves away from the extended end of the front wall plate, and the moving plate 3 is not located in the lower area of the protection measurement port 21, the moving plate 3 moves to the second position. At this time, the protection measurement port 21, the first cable groove 22, and the second cable groove 2112 are all in a non-occluded state.

[0099] Preferably, when the moving plate 3 moves to the lower part of the concave area, the moving plate 3 is located in the lower area of the protection measurement port 21, and the moving plate 3 is in the first position. At this time, the protection measurement port 21, the first cable groove 22, and the second cable groove 2112 are in an occluded state. When the moving plate 3 moves to the lower part of the flat area, the moving plate 3 is not located in the lower area of the protection measurement port 21, then the moving plate 3 is in the second position. At this time, the protection measurement port 21, the first cable groove 22, and the second cable groove 2112 are all in a non-occluded state.

[0100] Wherein, when the moving plate 3 is in the first position, the front buckle 33 is located inside the front card slot 2101, thereby fixing the current position of the moving plate 3.

[0101] Using a sliding method to move the moving plate 3 is more conducive to adjusting the state of the protection measurement port 21. Compared with the prior art's rotating shaft connection method, the connection method between the moving plate and the protection body can be simplified, and the connection performance between the moving plate and the protection body can be increased.

[0102] In this embodiment, specifically, the shielding housing includes a shielding main body 5 and a shielding upper cover 6. Among them, the shielding main body 5 is a rectangular housing with an open top end, and the shielding upper cover 6 covers the open top end of the shielding main body 5. The measuring assembly is in the shielding main body 5 and is grounded to the shielding main body 5. The shielding main body 5 and the shielding upper cover 6 are made of metal materials. After the shielding main body 5 is grounded to the measuring assembly, the shielding main body 5 can shield the interference signals from the external environment of the shielding main body 5, making the measurement of the cable 8 at the outlet of the hard pressure plate by the measuring assembly more accurate. It can be understood that when the shielding upper cover 6 covers the open top end of the shielding main body 5, it will contact the shielding main body 5. Due to the conductivity of the metal, when measuring the cable 8, both the shielding main body 5 and the shielding upper cover 6 are grounded. In other embodiments, the shielding main body 5 and the shielding upper cover 6 can also be made of insulating materials and then sprayed with conductive paint inside to achieve the shielding of the interference signals of the environmental electric field outside the cable 8 at the outlet of the hard pressure plate.

[0103] Further, the shielding main body 5 includes a shielding main body bottom plate 52, and a measuring port 51 corresponding to the position of the protection measuring port 21 is opened on the shielding main body bottom plate 52. The protection measuring port 21 is corresponding to the acquisition end in the measuring assembly through the measuring port 51.

[0104] Further, in the shielding main body 5, there are also a first lower extension plate 521, a second lower extension plate 522, a third lower extension plate 523 and a fourth lower extension plate 524 connected to the edge of the measuring port 51. The second lower extension plate 522 and the third lower extension plate 523 are arranged at intervals, both are connected to the same edge of the measuring port 51, and they are on the same axis. The first lower extension plate 521 and the fourth lower extension plate 524 are arranged at intervals, both are connected to the same edge of the measuring port 51, and they are on the same axis. Among them, the first lower extension plate 521 is substantially the same as the second lower extension plate 522 and their positions correspond to each other. The third lower extension plate 523 is substantially the same as the fourth lower extension plate 524 and their positions correspond to each other.

[0105] Furthermore, the top ends of the first lower extension plate 521, the second lower extension plate 522, the third lower extension plate 523 and the fourth lower extension plate 524 are all connected to the edge of the measuring port 51.

[0106] In this embodiment, the cable shielding member 7 is connected to the bottom end face of the shielding main body bottom plate 52 and corresponds to the measuring port 51. The cable shielding member 7 can be made of metal materials or insulating materials. When the cable shielding member 7 is made of insulating materials, conductive paint is sprayed on the surface of the cable shielding member 7 facing the shielding main body 5. According to the conductivity of the metal or the conductive paint, the cable shielding member 7 is also grounded to the measuring assembly to shield the interference signals outside the cable 8 at the outlet of the hard pressure plate.

[0107] Specifically, the cable shield 7 includes a first front panel 75, a first rear panel 76, a second rear panel 77, a measurement through-hole 78, a first upper extension plate 73, a second upper extension plate 74, a first bending plate and a second bending plate.

[0108] Further, the position of the first upper extension plate 73 corresponds to the position of the second upper extension plate 74. The end of the first upper extension plate 73 is connected to the first front panel 75, and the end of the second upper extension plate 74 is connected to the first rear panel 76 through the second rear panel 77.

[0109] Furthermore, the end of the second rear panel 77 is connected to the first rear panel 76. The front end of the second rear panel 77 is a free end and is inclined downward in the region below the second rear panel 77, such that the second rear panel 77 forms an inclined panel with a lower front end and a higher rear end. Since the end of the second upper extension plate 74 is connected to the front end of the second rear panel 77, the second upper extension plate 74 and the second rear panel 77 form a convex structure b.

[0110] Further, the position of the first bending plate corresponds to the position of the second bending plate. The two ends of the first bending plate are respectively connected to the first front panel 75 and the first rear panel 76. After the first bending plate is bent toward the shielding body 5, a first groove region 71 is formed in the region below it. The two ends of the second bending plate are respectively connected to the first front panel 75 and the first rear panel 76. After the second bending plate is bent toward the shielding body 5, a second groove region 72 is formed in the region below it. Among them, both the first groove region 71 and the second groove region 72 communicate with the measurement through-hole 78.

[0111] Further, the first bending plate includes a first front end plate 711, a first top plate 712 and a first rear end plate 713. The first front end plate 711 and the first rear end plate 713 are bent toward the shielding body 5, and the first top plate 712 is respectively connected to the top ends of the first front end plate 711 and the first rear end plate 713, such that the first front end plate 711, the first top plate 712 and the first rear end plate 713 enclose the first groove region 71. The second bending plate includes a second front end plate 721, a second top plate 722 and a second rear end plate 723. The second front end plate 721 and the second rear end plate 723 are bent toward the shielding body 5, and the second top plate 722 is respectively connected to the top ends of the second front end plate 721 and the second rear end plate 723, such that the second front end plate 721, the second top plate 722 and the second rear end plate 723 enclose the second groove region 72.

[0112] In this embodiment, the cable shield 7 is grounded to the shield main body bottom plate 52, thereby achieving shielding of external environmental interference signals. Specifically, the top end of the first upper extension plate 73 and / or the top end of the second upper extension plate 74 are connected to the edge of the measurement through hole 78. When the shield main body 5 is energized, after the cable shield 7 is connected to the shield main body 5, the cable shield 7 is also energized, realizing the shielding function.

[0113] In addition, after the cable shield 7 is grounded to the shield main body bottom plate 52, the top end faces of the first top plate 712 and the second top plate 722 are also respectively connected to the shield main body bottom plate 52, thereby further ensuring the connection performance between the cable shield 7 and the shield main body 5, making the cable shield 7 also energized and realizing the shielding function.

[0114] In this embodiment, when the protection main body 2, the shield main body 5 and the cable shield 7 are assembled, first, the shield main body 5 is placed in the protection main body 2 so that the opening area a217 corresponds to the measurement port 51; then, the cable shield 7 is fixed in the protection measurement port 21 from below the protection main body 2 so that the measurement through hole 78 is sequentially communicated with the opening area a217 and the measurement port 51; finally, the top end of the first upper extension plate 73 and / or the top end of the second upper extension plate 74 are connected to the edge of the measurement through hole 78.

[0115] Further, first, the cable shield 7 can be fixed to the bottom end face of the protection main body 2 by caulking or fasteners, and the upper part of the cable shield 7 penetrates through the protection measurement port 21. Then, the top end of the first upper extension plate 73 and / or the top end of the second upper extension plate 74 are connected to the edge of the measurement through hole 78 by welding.

[0116] In this embodiment, when the cable shield 7 is fixed to the bottom end face of the protection body 2, the first bent plate penetrates through the opening area c219, so that the top end face of the first top plate 712 contacts the bottom end face of the shield body bottom plate 52, and the second bent plate penetrates through the opening area b218, so that the top end face of the second top plate 722 contacts the bottom end face of the shield body bottom plate 52. At the same time, the second front end plate 721 shields the first front wall surface 220, the second lower extension plate 522 shields the first side wall surface 211, the first upper extension plate 73 shields the second front wall surface 221, the first lower extension plate 521 shields the second side wall surface 212, the first front end plate 711 shields the third front wall surface 222, the first rear end plate 713 shields the third rear wall surface 226, the fourth lower extension plate 524 shields the fourth side wall surface 214, the second upper extension plate 74 shields the second rear wall surface 224, the third lower extension plate 523 shields the third side wall surface 213, the second rear end plate 723 shields the first rear wall surface 223, the first front panel 75 shields the first inner wall surface 215, the first rear panel 76 shields the second inner wall surface 216, and the second rear panel 77 shields the third inner wall surface 225. After the cable shield 7 is connected to the shield body 5, through the above design, the wall surfaces of the opening area can achieve the shielding function.

[0117] Furthermore, the first lower extension plate 521 is located in the area between one side edge of the first upper extension plate 73 and the first front end plate 711, and this area is substantially the same as the first lower extension plate 521 and the second side wall surface 212. The second lower extension plate 522 is located in the area between one side edge of the first upper extension plate 73 and the second front end plate 721, and this area is substantially the same as the second lower extension plate 522 and the first side wall surface 211. The third lower extension plate 523 is located in the area between one side edge of the second upper extension plate 74 and the second rear end plate, and this area is substantially the same as the third lower extension plate 523 and the third side wall surface 213. The fourth lower extension plate 524 is located in the area between one side edge of the second upper extension plate 74 and the first rear end plate, and this area is substantially the same as the third lower extension plate 523 and the fourth side wall surface 214. The second front end plate 721 is substantially the same as the first front wall surface 220, the second rear end plate 723 is substantially the same as the first rear wall surface 223, the first front end plate 711 is substantially the same as the third front wall surface 222, the first rear end plate 713 is substantially the same as the third rear wall surface 226, the interval between the first lower extension plate 521 and the fourth lower extension plate 524 is substantially the same as the width of the first bent plate, and the interval between the second lower extension plate 522 and the third lower extension plate 523 is substantially the same as the width of the second bent plate. With such a design, the wall surfaces of the opening area can be comprehensively shielded, further improving the electrical shielding effect.

[0118] After the protruding structure b wraps around the outside of the protruding structure a, the lowermost end of the protruding structure b is located at the lower end of the bottom end face of the first rear panel. The protruding structure a can provide a certain strength for the protruding structure b, limit the position of the protruding structure b, prevent the protruding structure b from moving towards the position of the shielding housing under the action of an external force, and ensure that the lowermost end of the protruding structure b is always located at the lower end of the bottom end face of the first rear panel.

[0119] In this embodiment, on the basis that the first upper extension plate 73 and / or the second upper extension plate 74 are respectively connected to the edge of the measurement port 51, in order to further improve the connection performance between the cable shielding member 7 and the shielding main body 5, the first lower extension plate 521, the second lower extension plate 522, the third lower extension plate 523, and the fourth lower extension plate 524 can be respectively connected to the cable shielding member 7.

[0120] Specifically, the first side wall surface of the first lower extension plate 521 is connected to the wall surface of the first upper extension plate 73 close to the first lower extension plate 521, the second side wall surface of the first lower extension plate 521 is connected to the wall surface of the first front end plate 711 close to the first lower extension plate 521, and the bottom end face of the first lower extension plate 521 is connected to the wall surface of the first front panel 75 close to the first lower extension plate 521.

[0121] The first side wall surface of the second lower extension plate 522 is connected to the wall surface of the first upper extension plate 73 close to the second lower extension plate 522, the second side wall surface of the second lower extension plate 522 is connected to the wall surface of the second front end plate 721 close to the second lower extension plate 522, and the bottom end face of the second lower extension plate 522 is connected to the wall surface of the first front panel 75 close to the second lower extension plate 522.

[0122] The first side wall surface of the third lower extension plate 523 is connected to the wall surface of the second rear end plate 723 close to the third lower extension plate 523, the second side wall surface of the third lower extension plate 523 is connected to the wall surface of the second upper extension plate 74 close to the third lower extension plate 523, and the bottom end face of the third lower extension plate 523 is connected to the wall surface of the first rear panel 76 close to the third lower extension plate 523.

[0123] The first side wall surface of the fourth lower extension plate 524 is connected to the wall surface of the first rear end plate 713 close to the fourth lower extension plate 524, the second side wall surface of the fourth lower extension plate 524 is connected to the wall surface of the second upper extension plate 74 close to the fourth lower extension plate 524, and the bottom end face of the fourth lower extension plate 524 is connected to the wall surface of the first rear panel 76 close to the fourth lower extension plate 524.

[0124] In this embodiment, it further includes a moving plate shielding member 4. Specifically, the moving plate shielding member 4 is fixed in the upper groove 34.

[0125] Among them, the movable plate shield 4 can be made of a metal material or an insulating material. After the movable plate shield 4 is made of an insulating material, conductive paint is sprayed on the surface of the movable plate shield 4 facing the shielding body 5.

[0126] When the movable plate 3 moves to the lower area of the cable shield 7, a part of the movable plate shield 4 is also in the directly lower area of the cable shield 7, blocking the cable shield 7 and contacting the lowermost end of the convex structure b in the cable shield 7, so that the movable plate shield 4 is grounded to the cable shield 7, thereby realizing the shielding of external environmental interference signals. When the cable shield 7 is charged, the movable plate shield 4 is also charged, realizing the shielding function.

[0127] At the same time, when the movable plate shield 4 blocks the cable shield 7 and contacts the lowermost end of the convex structure b in the cable shield 7, the first shield, the second shield, the third shield and the movable plate shield form a shielding cavity.

[0128] In this embodiment, in use, first, move the movable plate 3 to the second position; then, place the cable 8 in the first cable groove 22, the first groove area 71, the measurement through hole 78, the second groove area 72 and the second cable groove 2112, and move the movable plate 3 to the first position to block the measurement through hole 78, the first cable groove 22 and the second cable groove 2112; finally, the measurement component senses the electric field of the cable 8 through the cable measurement hole, realizing the measurement of the hard pressure plate voltage.

[0129] In this embodiment, an equipment connection port is provided on the shielding body 5, which corresponds to the shielding wire through hole 2110 on the protection body 2, facilitating the connection of the measurement component to other equipment.

[0130] In this embodiment, since the shielding body 5 is placed inside the protection body 2, the top end face of the protection measurement port 21 abuts against the bottom end face of the shielding body 5. On this basis, the cable shield 7, the first lower extension plate 521, the second lower extension plate 522, the third lower extension plate 523 and the fourth lower extension plate 524 can fully block and shield the protection measurement port 21, enhancing the shielding performance of the protection measurement port 21 against interference signals in the external environment, improving the accuracy of voltage measurement, and obtaining the input / output state of the hard pressure plate.

[0131] In this embodiment, the movable plate shield 4 blocks the cable shield 7 and is connected to the cable shield 7 through the protruding structure b, so that the movable plate shield 4 can realize the shielding function of the cable measurement hole.

[0132] In this embodiment, the cable shielding member 7, the first lower extension plate 521, the second lower extension plate 522, the third lower extension plate 523 and the fourth lower extension plate 524 can fully shield and block the protection measurement port, making the protection measurement port a part of the shielding cavity, and can fully shield the wall surface of the protection measurement port, preventing interference signals from entering the cable measurement area through the wall surface of the protection measurement port.

[0133] In this embodiment, the cable shielding member 7, the moving plate shielding member 4, the first lower extension plate 521, the second lower extension plate 522, the third lower extension plate 523 and the fourth lower extension plate 524 cooperate to form a shielding cavity. When the measurement end of the cable 8 is placed in the shielding cavity, the shielding performance against interference signals in the external environment can be enhanced, the accuracy of voltage measurement can be improved, and the on / off state of the hard pressure plate can be obtained.

[0134] In this embodiment, after the cable shielding member 7 is connected to the shielding main body 5 located in the protection main body 2, the protection main body 2 is located between the cable shielding member 7 and the shielding main body 5, which can increase the connection performance among the cable shielding member 7, the protection main body 2 and the shielding main body 5.

[0135] In this embodiment, since the cable shielding member 7 can be directly connected to the shielding main body 2 after passing through the protection measurement port 21, compared with the prior art, there is no need to set a connection shielding member between the cable shielding member and the shielding main body.

[0136] In this embodiment, on the basis that the first upper extension plate 73 and / or the second upper extension plate 74 are respectively connected to the edge of the measurement port 51, in order to further increase the connection performance between the cable shielding member 7 and the shielding main body 5, the first lower extension plate 521, the second lower extension plate 522, the third lower extension plate 523 and the fourth lower extension plate 524 can be respectively connected to the cable shielding member 7.

[0137] Embodiment Two

[0138] This embodiment provides an assembly method for a hard pressure plate voltage monitoring device, which is used to assemble the hard pressure plate voltage monitoring device in the above Embodiment One, and includes the following steps:

[0139] S1. Place the measurement component inside the shielding housing;

[0140] S2. Place the shielding housing inside the insulating protection housing, the top end face of the protection measurement port abuts against the bottom end face of the shielding main body, the acquisition end of the measurement component corresponds to the measurement port and the protection measurement port in sequence, and the first shielding member connected to the edge of the measurement port extends downward to block a part of the inner wall surface of the protection measurement port.

[0141] S3. The cable shield is assembled on the insulating protective housing from bottom to top. The measurement through holes correspond to the protection measurement ports and the measurement through holes in sequence. After the second shield in the cable shield penetrates through the protection measurement port, at least a part of it is connected to the shield housing to block a partial area of the inner wall surface of the protection measurement port. The third shield in the cable shield covers and blocks the bottom end face of the protection measurement port. After the cable shield is fixedly connected to the shield housing, it is energized to achieve the electrical shielding function.

[0142] S4. The moving plate moves horizontally on the bottom end face of the insulating protective housing. When the moving plate shield blocks and contacts a part of the cable shield, the moving plate shield has the shielding function.

[0143] S5. The first shield, the second shield, the third shield and the moving plate shield form a shielding cavity.

[0144] Embodiment Three

[0145] As Figure 18 shown, this embodiment provides a hard pressure plate voltage monitoring system, including a collector 11 and the hard pressure plate voltage monitoring device 10 in Embodiment One. The collector 11 includes at least one communication aviation plug 13 and at least one probe connection aviation plug 12. The probe connection aviation plug 12 of the collector 11 and the hard pressure plate voltage monitoring device 10 are connected by a shielded wire 9. The hard pressure plate voltage monitoring device 10 is used to detect the voltage of the hard pressure plate outlet cable and output a voltage analog signal of the cable 8 at the hard pressure plate outlet; the collector 11 is used to obtain the on / off state of the hard pressure plate according to the voltage analog signal. The collector 11 includes a single-chip microcomputer module and a probe interface module. The single-chip microcomputer module is electrically connected to the probe interface module, and the probe interface module is connected to the shielded wire 9. The probe interface module is used to amplify the voltage analog signal; the single-chip microcomputer module is used to convert the received voltage analog signal into a data signal, that is, voltage data according to the voltage analog signal sent by the probe interface module, and obtain the on / off state of the hard pressure plate according to the judgment of the voltage data.

[0146] To ensure the safe use of the power supply, the collector 11 further includes a power supply module and a power supply protection module. The power supply protection module is electrically connected to the power supply module, and the power supply module is electrically connected to the single-chip microcomputer module. The power supply protection module is used to protect the single-chip microcomputer module and has functions such as isolation, short-circuit protection, over-voltage protection, under-voltage protection, over-current protection, voltage stabilization, and noise reduction; the power supply module is used to provide power for the single-chip microcomputer module.

[0147] To ensure that the connected devices do not affect the microcontroller module, the collector further includes a serial communication module and a serial protection module. The serial protection module is electrically connected to the serial communication module, and the serial communication module is electrically connected to the microcontroller module. The serial protection module is used to protect the serial communication module and prevent voltage surges from damaging the serial communication module and the microcontroller module. The serial communication module is used to establish communication with other devices and can send the on / off status of the hard pressure plate.

[0148] To reduce the workload of staff who need to regularly check the hard pressure plate information, a hard pressure plate voltage monitoring system is established to achieve centralized collection of the status information of the hard pressure plate. The embodiment of the present application provides a hard pressure plate voltage monitoring method, which is applied to the collector in the hard pressure plate voltage monitoring system. By analyzing and judging the obtained voltage data of the hard pressure plate, the on / off status of the hard pressure plate is determined. The main process of the method is described as follows.

[0149] As Figure 19 shown:

[0150] Step S201: Obtain the voltage data set of the hard pressure plate within a preset time period.

[0151] Specifically, the hard pressure plate voltage monitoring device can detect the voltage of the cable at the hard pressure plate outlet, and then send the data measured by the hard pressure plate voltage monitoring device to the collector. The collector will obtain the voltage data measured by the hard pressure plate voltage monitoring device. Obtain the voltage data within a recent period of time to form a voltage data set. For example, if the preset time period is ten minutes, then obtain the voltage data at the current moment and the previous ten minutes to form a voltage data set.

[0152] The preset time period is determined by the following method:

[0153] Obtain the decay change waveform diagrams of the hard pressure plate monitoring voltage in different environments. The decay change waveform diagram refers to the voltage change situation of the hard pressure plate. In a specific implementation manner, the horizontal axis of the decay change waveform diagram is time, and the vertical axis is the voltage of the hard pressure plate. It should be understood that in different environments, the voltage change situation of the hard pressure plate is different. Different environments mean that at least one of the factors such as humidity and air pressure in the two environments is different. At the same time, the wire materials of the hard pressure plate are different, and the voltage change situations are also different. In a specific implementation manner, obtain two decay change waveform diagrams. The humidity of the environments where the two decay change waveform diagrams are located is different. The two diagrams are respectively referred to as the first waveform diagram and the second waveform diagram. According to the decay change waveform diagrams, calculate the decay time in different environments. The decay time refers to the time it takes for the voltage of the hard pressure plate to drop to a specified value when switching from the on state to the off state. The specified value is set by the staff according to the actual situation. Take the maximum value of the decay time in different environments as the preset time period.

[0154] Step S202: Calculate the difference between the maximum and minimum values in the voltage dataset.

[0155] Step S203: Determine the on / off state of the hard pressure plate according to the difference.

[0156] When the difference is greater than the preset difference value, switch the on / off state of the hard pressure plate. For example, if the current state of the hard pressure plate is the on state, when the difference is greater than the preset difference value, the state of the hard pressure plate changes from the on state to the off state. Another example, if the current state of the hard pressure plate is the off state, when the difference is greater than the preset difference value, the state of the hard pressure plate changes from the off state to the on state.

[0157] In a specific embodiment, taking the DC voltage as 110V when the hard pressure plate is in the on state as an example, refer to Figure 20 , including the off state s0 of the hard pressure plate, and the voltage is always 0V in the off state; when the hard pressure plate is in the on state, corresponding to the s1 part, the voltage value Uo output by the hard pressure plate voltage monitoring device 10 rises and stabilizes at 110V in a short time; when the hard pressure plate is off or disconnected due to unreliable connection, corresponding to the s2 part, the voltage waveform changes to a slow decay discharge process of a floating metal body. Set the decay change value Δy as the difference between the stable voltage 110V and 10% of the stable voltage 110V, that is, Δy = 110V - 110V×10%. Under two environmental conditions with different humidities, record the decay time Δt experienced when the difference between Uo and the measured DC voltage value 110V is greater than Δy, which are Δt1 and Δt2 respectively.

[0158] Since the decay time Δt will vary greatly when the environment changes. Refer to Figure 20 , set the time threshold ΔT, that is, the preset time period, with the larger decay time Δt. The monitoring device outputs the voltage value Uo that has been stable at about 110V, and it is considered that the state of the hard pressure plate is on. However, due to external environmental changes, Uo jumps at ΔT. During the ΔT time, if the maximum change amount of Uo is less than Δy, it is considered that the state of the hard pressure plate does not change. If the maximum change amount of Uo is not less than Δy, it is considered that the state of the hard pressure plate has changed. Δy is the preset difference value.

[0159] The above are only the preferred embodiments of the present invention, which are illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims

1. A hard plate voltage monitoring device, comprising an insulating protective shell, a shielding shell, a cable shielding member and a measuring component, wherein the measuring component and the shielding shell are sequentially placed inside the insulating protective shell, characterized in that: The insulating protective shell includes a protective measuring port opened on the bottom end surface thereof, and a movable shielding component moving along the horizontal direction on the bottom end surface thereof; The cable shielding member is mounted on the bottom end surface of the insulating protective shell, a portion of the cable shielding member passes through the protective measuring port and is connected to the shielding shell, and shields at least a portion of the protective measuring port, wherein the cable shielding member further includes a protruding structure b extending to a position below the cable shielding member; When the movable shielding assembly moves and shields the cable shielding member, at least a portion of which contacts the protruding structure b, the movable shielding assembly forms a part of the shielding cavity; The cable shielding member includes a measuring through hole, and an upper end portion and a lower end portion connected thereto. After the upper end portion passes through the protective measuring port, at least a portion thereof is connected to the shielding shell to form a second shielding member that shields a portion of the inner wall surface of the protective measuring port, and the lower end portion forms a third shielding member that covers and shields the bottom end surface of the protective measuring port. The upper end portion includes a first upper extension plate, a second upper extension plate, a first bent plate and a second bent plate that penetrate the protective measuring port, the first upper extension plate and / or the second upper extension plate are connected to the edge of the measuring port, and the top end surface of the first bent plate and the top end surface of the second bent plate are both in contact with the bottom end surface of the shielding shell; The lower end portion includes a first front panel, a first rear panel and a second rear panel, the end of the first upper extension plate, the front end of the first bent plate and the front end of the second bent plate are all connected to the first front panel, the rear end of the first bent plate and the rear end of the second bent plate are all connected to the first rear panel, and the second upper extension plate is connected to the first rear panel through the second rear panel; The front end of the second rear panel is inclined toward the lower area of ​​the second rear panel, so that the second rear panel forms an inclined panel; The end of the second upper extension plate is connected to the front end of the second rear panel, so that the second upper extension plate and the second rear panel form the protruding structure b.

2. The hard platen voltage monitoring device according to claim 1, characterized in that: A measuring port corresponding to the protective measuring port is provided on the bottom end surface of the shielding shell, and a first shielding member for shielding a portion of the inner wall surface of the protective measuring port is provided on the edge of the measuring port; When the movable shielding assembly moves and blocks the cable shielding component, and at least a portion thereof contacts the protruding structure b, the first shielding component, the second shielding component, the third shielding component and the movable plate shielding component form the shielding cavity.

3. The hard platen voltage monitoring device according to claim 2, characterized in that: The first shielding member includes a first lower extension plate, a second lower extension plate, a third lower extension plate and a fourth lower extension plate connected to the edge of the measuring port, the position of the first lower extension plate corresponds to the position of the second lower extension plate, the position of the third lower extension plate corresponds to the position of the fourth lower extension plate, wherein the second lower extension plate and the third lower extension plate are spaced apart and connected to the same edge of the measuring port along the same axis, and the first lower extension plate and the fourth lower extension plate are spaced apart and connected to the same edge of the measuring port along the same axis.

4. The hard platen voltage monitoring device according to claim 2, characterized in that: The measuring through hole is located on the lower end portion, and the measuring through hole is communicated with the protection measuring port and the measuring port to form a cable measuring hole.

5. The hard platen voltage monitoring device according to claim 4, characterized in that: The first bent plate includes a first front end plate, a first top plate, and a first rear end plate connected in sequence, the first front end plate and the first rear end plate are bent toward the position of the shielding shell, so that the first top plate is located above the first front end plate, the first rear end plate, and the lower end portion, and the first front end plate, the first top plate, and the first rear end plate surround a first groove area; The second bending plate includes a second front end plate, a second top plate and a second rear end plate connected in sequence, and the second front end plate and the second rear end plate are bent toward the position of the shielding body so that the second top plate is located above the second front end plate, the second rear end plate and the lower end portion, and the second front end plate, the second top plate and the second rear end plate form a second groove area.

6. The hard platen voltage monitoring device according to any one of claims 2 to 5, characterized in that: The protection measurement port includes a first wall surface adjacent to the front wall plate of the insulating protection shell, a second wall surface adjacent to the rear wall plate of the insulating protection shell, and an opening area between the first wall surface and the second wall surface; The first shielding member shields a first portion of the first wall surface and a first portion of the second wall surface, and the second shielding member shields a second portion of the first wall surface and a second portion of the second wall surface; The opening area includes an opening area a, an opening area b and an opening area c which are connected to each other, and the opening area a is connected to the measuring port and the measuring through hole respectively.

7. The hard platen voltage monitoring device according to claim 6, characterized in that: The first wall surface includes a first front wall surface, a first side wall surface, a second front wall surface, a second side wall surface and a third front wall surface connected in sequence, and the second wall surface includes a first rear wall surface, a third side wall surface, a second rear wall surface, a fourth side wall surface and a third rear wall surface connected in sequence; Among them, the first front wall surface corresponds to the first rear wall surface, forming two wall surfaces of the opening area b, the connected first side wall surface, the second front wall surface and the second side wall surface, and the connected third side wall surface, the second rear wall surface and the fourth side wall surface respectively form the corresponding two wall surfaces of the opening area a, and the third front wall surface and the third rear wall surface correspond to each other, forming two wall surfaces of the opening area c.

8. The hard platen voltage monitoring device according to claim 7, characterized in that: The protective measuring port also includes a first inner wall surface, a second inner wall surface and a third inner wall surface. The end of the third inner wall surface is connected to the second inner wall surface, and the front end of the third inner wall surface is connected to the second rear wall surface. The lower end of the second rear wall surface extends to the lower area of ​​the bottom end surface of the insulating protective shell, forming a protruding structure a that at least partially protrudes from the second inner wall surface.

9. The hard platen voltage monitoring device according to claim 8, characterized in that: The bottom end surface of the insulating protective shell is provided with a first slide rail and a second slide rail arranged in parallel, wherein: The bottom end surface of the first slide rail and the bottom end surface of the second slide rail both protrude from the bottom end surface of the insulating protective shell, the outer wall surface of the first slide rail is connected to the outer wall surface of the first side plate of the insulating protective shell, and the two are in the same plane, and the outer wall surface of the second slide rail is connected to the outer wall surface of the second side plate of the insulating protective shell, and the two are in the same plane; The movable shielding assembly moves horizontally on the bottom end surface of the insulating protective shell through the first slide rail and the second slide rail. When the movable shielding assembly moves and blocks the cable shielding component, at least a portion of the movable shielding assembly contacts the protruding structure b, and the movable plate shielding component is energized to realize the shielding function.

10. The hard platen voltage monitoring device according to claim 9, characterized in that: A local area of ​​the first slide rail is recessed toward the top end surface of the first side plate to form a first cable trough, and a local area of ​​the second slide rail is recessed toward the top end surface of the second side plate to form a second cable trough, wherein: The first cable trough is in communication with the opening area b, and the second cable trough is in communication with the opening area c.

11. The hard platen voltage monitoring device according to claim 10, characterized in that: The movable shielding assembly comprises a movable plate and a movable plate shielding member, wherein: The movable plate moves horizontally on the bottom end surface of the insulating protective shell through the first slide rail and the second slide rail to cover the cable shielding member, the first cable groove and the second cable groove; The movable plate shielding component is arranged on the top end surface of the movable plate and faces the cable shielding component. When the movable plate moves and blocks the cable shielding component, at least a portion of the movable plate shielding component contacts the protruding structure b, and the movable plate shielding component is energized to realize the shielding function.

12. A hard plate voltage monitoring system, characterized in that: It comprises a hard platen voltage monitoring device and a collector as described in any one of claims 1 to 11, wherein the collector is connected to the hard platen voltage monitoring device via a shielded wire; The hard pressing plate voltage monitoring device is used to output a voltage analog signal of the cable at the hard pressing plate outlet; The collector is used to obtain the insertion and retraction status of the hard pressing plate according to the voltage simulation signal.

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