Improved structure, assembly method and system of hard plate voltage monitoring device

Abstract

The present invention provides an improved structure, assembly method and system for a hard pressure plate voltage monitoring device, wherein an insulating protective shell includes a protective measuring port formed on its bottom end face; a measuring port corresponding to the protective measuring port is provided on the bottom end face of the shielding shell, and the edge of the measuring port is provided with a first shielding component extending downward to form a shielding of the protective measuring port; a cable shielding member is assembled on the insulating protective shell, including a measuring through hole, 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 of the upper end portion is connected to the shielding body to form a second shielding component shielding the protective measuring port, and the lower end portion forms a third shielding component shielding the protective measuring port, and the first shielding component, the second shielding component and the third shielding component make the protective measuring port a part of the shielding cavity. The present invention can fully shield the wall surface of the protective measuring port to prevent interference signals from entering the cable measurement area through the wall surface of the protective measuring port.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid hard pressure plate state detection, and in particular to an improved structure, an assembly method and a system of a hard pressure plate voltage monitoring device. 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 shielding connector 7' is fixed on the protective body 2', and the protective measuring port 21' corresponds to the middle hollow of the shielding connector 7'. The fixed shielding connector 7' is then connected to the circuit board shielding body 5' loaded into the protective body 2' by welding. In this way, when in use, because the shielding connector 7' and the circuit board shielding body 5' are welded and the circuit board shielding body 5' is charged, the shielding connector 7' is charged. Through the contact between the cable shielding member 4' and the shielding connector 7', the cable shielding member 4' can be grounded to achieve the shielding function.

[0006] However, since the inner wall surface of the protection measuring port 21' is not completely covered by the shielding component, when measuring the voltage on the cable, the interference signal in the external environment will enter the protection measuring port 21' through the area of ​​the protection measuring port 21' not covered by the shielding component, causing the protection measuring port 21' to still be interfered by the signal in the external environment, thereby affecting the accuracy of the voltage measurement.

[0007] Therefore, how to fully shield the protection measurement port 21 ′ to prevent the protection measurement port 21 ′ from being interfered by signals in the external environment so as to improve the accuracy of voltage measurement 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 an improved structure, assembly method and system for a hard pressure plate voltage monitoring device which can completely shield the wall surface of the protective measurement port, so that the protective measurement port becomes a part of the shielding cavity, thereby preventing interference signals from entering the cable measurement area through the wall surface of the protective measurement port.

[0009] To achieve the above-mentioned object, in a first aspect, the present invention provides an improved structure of 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 formed on a bottom end surface thereof;

[0010] A measuring port corresponding to the protective measuring port is provided on the bottom end surface of the shielding shell, and a first shielding component extending downward to form a first portion of the protective measuring port is provided at the edge of the measuring port;

[0011] The cable shielding member is mounted on the insulating protective shell, and includes a measuring through hole, and an upper end portion and a lower end portion connected thereto, wherein the upper end portion passes through the protective measuring port, and at least a portion thereof is connected to the shielding body to form a second shielding component that shields the second portion of the protective measuring port, and the lower end portion forms a third shielding component that covers and shields the bottom end surface of the third portion of the protective measuring port;

[0012] The first shielding component, the second shielding component and the third shielding component make the protection measurement port a part of the shielding cavity.

[0013] In one embodiment, the first shielding assembly 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.

[0014] In one embodiment, the upper end portion includes a first upper extension plate, a second upper extension plate, a first bent plate and a second bent plate. After the upper end portion passes 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, 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;

[0015] 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;

[0016] The measuring through hole is located on the lower end portion, and the measuring through hole is sequentially connected with the protection measuring port and the measuring port to form a cable measuring hole.

[0017] In one embodiment, 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 enclose a first groove area;

[0018] 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.

[0019] In one embodiment, 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;

[0020] 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 a protruding structure b.

[0021] In one embodiment, the protective measurement port includes a first wall surface adjacent to the front wall plate of the insulating protective shell, a second wall surface adjacent to the rear wall plate of the insulating protective shell, and an opening area between the first wall surface and the second wall surface;

[0022] The first shielding component shields a first portion of the first wall surface and a first portion of the second wall surface, and the second shielding component shields a second portion of the first wall surface and a second portion of the second wall surface;

[0023] 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.

[0024] 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;

[0025] 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.

[0026] In one embodiment, 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, the front end of the third inner wall surface is connected to the second rear wall surface, and the lower end of the second rear wall surface extends to the lower area of ​​the bottom end surface of the insulating protective shell to form a protruding structure a that at least partially protrudes from the second inner wall surface.

[0027] In one embodiment, a first slide rail and a second slide rail arranged in parallel are provided on the bottom end surface of the insulating protective shell, 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.

[0028] In one embodiment, 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 groove, 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 groove;

[0029] Wherein, the first cable trough is communicated with the opening area b, and the second cable trough is communicated with the opening area c.

[0030] In one of the embodiments, a movable plate which can be moved in a horizontal direction to shield the cable shielding member is further provided on the bottom end surface of the insulating protective shell, and a movable plate shielding member facing the cable shielding member is provided on the top end surface of the movable plate;

[0031] Among them, when the movable plate moves in a horizontal direction 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 part, the first cable trough and the second cable trough, the movable plate shielding part covers and contacts with a part of the cable shielding part, and the movable shielding part has a shielding function.

[0032] In a second aspect, the present invention further provides an assembly method of a hard pressing plate voltage monitoring device, which is used to assemble the hard pressing plate voltage monitoring device, and comprises the following steps:

[0033] S1. The measuring component is placed inside the shielding shell;

[0034] S2, the shielding shell is placed inside the insulating protective shell, the top end face of the protective measuring port is abutted against the bottom end face of the shielding body, the collection end of the measuring component corresponds to the measuring port and the protective measuring port in sequence, and the first shielding component connected to the edge of the measuring port extends downward to cover the first part of the protective measuring port;

[0035] S3. The cable shielding component is assembled on the bottom end face of the insulating protective shell from bottom to top, and the measuring through holes correspond to the protective measuring port and the measuring through holes in sequence. After the second shielding component in the cable shielding component passes through the protective measuring port, at least a part of it is connected to the shielding shell to shield the second part of the protective measuring port. The third shielding component in the cable shielding component covers and shields the bottom end face of the third part of the protective measuring port. The first shielding component, the second shielding component and the third shielding component make the protective measuring port a part of the shielding cavity.

[0036] In a third aspect, the present invention further provides a hard platen voltage monitoring system, comprising the hard platen voltage monitoring device and a collector, wherein the collector is connected to the hard platen voltage monitoring device via a shielded wire;

[0037] The hard pressing plate voltage monitoring device is used to output a voltage analog signal of the cable at the hard pressing plate outlet;

[0038] The collector is used to obtain the insertion and retraction status of the hard pressing plate according to the voltage simulation signal.

[0039] Compared with the prior art, the present invention has one of the following advantages:

[0040] The protection measuring port can be fully shielded and shielded by the cable shielding member, the first lower extension plate, the second lower extension plate, the third lower extension plate and the fourth lower extension plate, so that the protection measuring port becomes a part of the shielding cavity, and the wall surface of the protection measuring port can be fully shielded to prevent interference signals from entering the cable measurement area through the wall surface of the protection measuring port;

[0041] After the cable shielding part is assembled on the insulating protective shell, a part of the cable shielding part passes through the protective measuring port and is directly connected to the shielding shell. Compared with the prior art, there is no need to set a shielding connector, 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 ensure the shielding performance against interference signals in the external environment;

[0042] When the movable plate shielding member moves and shields the cable shielding member, it contacts the protruding structure b, so that the movable plate shielding member has a shielding function, which can further enhance the shielding performance of interference signals in the external environment;

[0043] The movable plate uses a sliding manner to cover the cable measuring hole, which makes it easier to adjust the state of the cable measuring 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 movable plate and the protective body can be simplified, and the connection performance between the movable plate and the protective body can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is an exploded view of the existing hard pressure plate voltage monitoring device;

[0045] Figure 2 is a first state diagram of the hard pressing plate voltage monitoring device in the present invention;

[0046] Figure 3 is a second state diagram of the hard pressing plate voltage monitoring device in the present invention;

[0047] Figure 4 for Figure 3 Exploded diagram of

[0048] Figure 5 for Figure 3 An exploded view from another perspective;

[0049] Figure 6 It is a connection diagram of the shielding body and the cable shielding member in the present invention;

[0050] Figure 7 for Figure 6 A magnified view of part A;

[0051] Figure 8 for Figure 6 A cross-sectional view of

[0052] Fig. 9 for Figure 8 A magnified view of part B;

[0053] Fig.10 for Figure 6 Exploded diagram of

[0054] Fig.11 is a structural diagram of the cable shielding member of the present invention;

[0055] Fig.12 A structural diagram of the cable shielding member of the present invention from another perspective;

[0056] Fig.13 A state diagram of the connection between the hard pressure plate voltage monitoring device and the cable in the present invention;

[0057] Fig.14 for Fig.13 A cross-sectional view of

[0058] Fig.15 for Fig.14 Enlarged view of part C;

[0059] Fig.16 It is a structural diagram of the subject protected in the present invention;

[0060] Fig.17 It is a partial structural diagram of the subject protected in the present invention;

[0061] Fig.18 It is a structural diagram of the hard pressing plate voltage monitoring system in the present invention;

[0062] Fig.19 It is a flow chart of the hard pressing plate voltage monitoring method in the present invention;

[0063] Fig. 20 This is a voltage waveform diagram of the hard pressing plate voltage monitoring method of the present invention.

[0064] The main reference numerals are as follows:

[0065] 1`-protective cover; 2`-protective body; 21`-protective measuring port; 3`-protective side cover; 4`-cable shielding; 5`-shielding body; 51`-measuring port; 6`-shielding cover; 7`-shielding connector;

[0066] 1-protective cover; 101-clip protrusion;

[0067] 2-protection body; 21-protection measuring port; 211-first side wall; 212-second side wall; 213-third side wall; 214-fourth side wall; 215-first inner wall; 216-second inner wall; 217-opening area a; 218-opening area b; 219-opening area c; 220-first front wall; 221-second front wall; 222-third front wall; 223-first rear wall; 224-second rear wall; 225-third inner wall; 226-third rear wall; 22-first cable groove; 23-first slide rail; 24-second slide rail; 241-limiting protrusion; 25-clip fixing port; 27-protective body bottom plate; 28-first side plate; 29-second side plate; 210-front wall plate; 2101-front card slot; 2110-shielding wire through hole; 2111-rear wall plate; 2112-second cable groove;

[0068] 3-movable plate; 31-first slide slot; 32-second slide slot; 33-front buckle; 34-upper groove;

[0069] 4- Mobile plate shield;

[0070] 5-shielding body; 51-measuring port; 52-shielding body bottom plate; 521-first lower extension plate; 522-second lower extension plate; 523-third lower extension plate; 524-fourth lower extension plate;

[0071] 6- Shielding cover;

[0072] 7-cable shielding member; 71-first groove area; 711-first front end plate; 712-first top plate; 713-first rear end plate; 72-second groove area; 721-second front end plate; 722-second top plate; 723-second rear end plate; 73-first upper extension plate; 74-second upper extension plate; 75-first front panel; 76-first rear panel; 77-second rear panel; 78-measuring through hole;

[0073] 8-cable; 9-shielded wire; 10-hard pressure plate voltage monitoring device; 11-collector; 12-probe connection aviation plug; 13-communication aviation plug. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0075] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top surface", "bottom surface", "inside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying 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 therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0076] Embodiment 1

[0077] like Figures 2 to 17 As shown, this embodiment provides a hard pressure plate voltage monitoring device, including an insulating protective shell, a measuring component and a shielding shell, wherein the measuring component 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 measurement holes (i.e., corresponding measurement ports 51, protective measurement ports 21 and measurement through holes 78) are formed on the insulating protective shell and the shielding shell. When a cable 8 of a hard pressure plate outlet is provided in the cable measurement hole, the voltage at the measuring end of the cable 8 can be detected by the measuring component, thereby measuring the voltage of the hard pressure plate according to the electric field generated by the cable 8 of the hard pressure plate outlet.

[0078] The insulating protective shell can be made of other insulating materials such as nylon, ABS plastic, ASA plastic, etc., which is used to protect the shielding shell and also avoid accidental contact with electricity when using the cable 8 at the hard pressure plate outlet for voltage measurement, thereby ensuring the safe use of the hard pressure plate voltage monitoring device.

[0079] The shielding shell can be made of metal material. When the shielding shell is grounded to the measuring component, the shielding shell can shield interference signals from the external environment, so that the measuring component can measure the cable 8 at the outlet of the hard pressure plate more accurately.

[0080] The measuring component can adopt a vibration capacitive electric field sensor, a rotating blade 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.

[0081] In this embodiment, specifically, the insulating protective shell includes a protective upper cover 1, a protective body 2 and a movable plate 3. The protective body 2 is a rectangular shell with an opening at the top, and a protective measuring port 21 is provided on the bottom end face of the protective body 2. The protective upper cover 1 covers the top opening of the protective body 2. The movable plate 3 is located on the bottom end face of the protective body 2 and can be moved from a first position on the bottom end face of the protective body 2 to a second position. When the movable plate 3 moves to the first position, it is located at the bottom end of the protective measuring port 21 to cover the protective measuring port 21.

[0082] Furthermore, a snap-on protrusion 101 is provided on the protective upper cover 1, and snap-on fixing openings 25 which are located at the same position as and matched with the snap-on protrusion 101 are provided on the first side wall surface 211 and the second side wall surface 212 of the protective main body 2, and a shielding wire through hole 2110 is also provided on the rear wall plate 2111 of the protective main body 2.

[0083] Further, the protection 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 protection body bottom plate 27. The bottom end surface of the front wall plate 210 extends downward to the bottom of the protection body bottom plate 27 to form a front wall plate extension end, and a front slot 2101 is formed on a local area of ​​the bottom end surface of the front wall plate extension end. The protection measurement port 21 is located on the protection body bottom plate 27, runs through the interior thereof, and corresponds to the collection end of the measurement component. A first slide rail 23 and a second slide rail 24 are also provided in parallel on the protection body bottom plate 27, wherein the bottom end surface of the first slide rail 23 and the bottom end surface of the second slide rail 24 both protrude from the protection body bottom plate 27, the outer wall surface of the first slide rail 23 is connected to the outer wall surface of the first side plate 28, and the two are in the same plane, and the outer wall surface of the second slide rail 24 is connected to the outer wall surface of the second side plate 29, and the two are in the same plane.

[0084] Furthermore, the bottom end surface of the extended end of the front wall plate is located below the bottom end surface of the first slide rail 23 and the bottom end surface of the second slide rail 24 .

[0085] Furthermore, a front locking groove 2101 corresponding to the area between the first slide rail 23 and the second slide rail 24 is formed on a local area of ​​the bottom end surface of the extended end of the front wall plate.

[0086] In this embodiment, the protective measuring port 21 is located close to the front wall plate 210, which 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.

[0087] Furthermore, 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, and the lower end of the second rear wall surface 224 extends to the lower area of ​​the protective body bottom plate 27 to form a protruding structure a at least partially protruding from the second inner wall surface 216. The protruding structure a includes an inclined surface (i.e., the third inner wall surface 225) that is higher at the back and lower at the front.

[0088] 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, and 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 plate 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, and 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 plate 2111 than the first rear wall surface 223 and the third rear wall surface 226.

[0089] Furthermore, 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 a 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 a second wall surface of the opening area.

[0090] Furthermore, the opening area includes the connected opening area a217, the opening area b218 and the opening area c219, the first front wall surface 220 corresponds to the first rear wall surface 223, and forms the two inner wall surfaces of the opening area b218. The first side wall surface 211 corresponds to the second side wall surface 212, 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, 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 the two wall surfaces of the opening area a217. The third front wall surface 222 corresponds to the third rear wall surface 226, and forms the two inner wall surfaces of the opening area c219.

[0091] In this embodiment, a first cable groove 22 and a second cable groove 2112 are provided at corresponding positions on the bottom end surface of the first slide rail 23 and the bottom end surface of the second slide rail 24. The first cable groove 22 is formed by the bottom end surface of the first slide rail 23 being recessed in the direction of the top end surface of the first side plate 28, and the second cable groove 2112 is formed by the bottom end surface of the second slide rail 24 being recessed in the direction of the top end surface of the second side plate 29.

[0092] Furthermore, the inner area of ​​the first cable trough 22 is connected to the inner area of ​​the opening area c219, and the inner area of ​​the second cable trough 2112 is connected to the inner area of ​​the opening area b218, so that the first cable trough 22 is connected to the second cable trough 2112 via the opening area c219, the opening area a217, and the opening area b218.

[0093] In this embodiment, the protective main body bottom plate 27 includes a planar area close to the rear wall plate 2111 and a recessed area close to the front wall plate 210, wherein the protective measuring port 21 is located in the recessed area, and the lowermost end of the third inner wall surface 225 is roughly in the same plane as the bottom end surface of the planar area.

[0094] In this embodiment, a limiting protrusion 241 is included in the first slide rail 23 and / or the second slide rail 24. When the movable plate 3 is arranged on the bottom end surface of the protective body 2 through the first slide rail 23 and the second slide rail 24, the moving position of the movable plate 3 can be limited by the limiting protrusion 241 to prevent the movable plate 3 from separating from the protective body 2.

[0095] In this embodiment, the movable plate 3 is provided with a first slide groove 31 cooperating with the first slide rail 23, a second slide groove 32 cooperating with the second slide rail 24, a front buckle 33 cooperating with the front slot 2101, and an upper groove 34 formed on the top end surface of the push plate.

[0096] Further, the movable plate 3 can move on the bottom end surface of the protective body 2 through the matching first slide rail 23 and the first slide groove 31, and the matching second slide rail 24 and the second slide groove 32. When the movable plate 3 moves forward so that the front end surface of the movable plate 3 contacts the rear end surface of the extension end of the front wall plate, and the movable plate 3 is located in the lower area of ​​the protective measuring port 21, the movable plate 3 moves to the first position, at which time, the protective measuring port 21 and the first cable groove 22 and the second cable groove 2112 are in a shielding state. When the movable plate 3 moves backward so that the front end surface of the movable plate 3 is away from the extension end of the front wall plate, and the movable plate 3 is not located in the lower area of ​​the protective measuring port 21, the movable plate 3 moves to the second position, at which time, the protective measuring port 21 and the first cable groove 22 and the second cable groove 2112 are all in a non-shielding state.

[0097] Preferably, when the movable plate 3 moves to the lower part of the recessed area, the movable plate 3 is located in the lower part of the protection measuring port 21, and the movable plate 3 is in the first position, at which time the protection measuring port 21 and the first cable trough 22 and the second cable trough 2112 are in a shielding state. When the movable plate 3 moves to the lower part of the plane area, the movable plate 3 is not located in the lower part of the protection measuring port 21, and the movable plate 3 is in the second position, at which time the protection measuring port 21 and the first cable trough 22 and the second cable trough 2112 are all in a non-shielding state.

[0098] When the movable plate 3 is in the first position, the front buckle 33 is located inside the front buckle slot 2101 , thereby fixing the current position of the movable plate 3 .

[0099] The movable plate 3 is moved in a sliding manner, which makes it easier to adjust the state of the protective measuring port 21. Compared with the shaft connection method in the prior art, the connection method between the movable plate and the protective body can be simplified, and the connection performance between the movable plate and the protective body can be increased.

[0100] In this embodiment, specifically, the shielding shell includes a shielding body 5 and a shielding cover 6, wherein the shielding body 5 is a rectangular shell with an opening at the top, the shielding cover 6 covers the top opening of the shielding body 5, and the measuring component is in the shielding body 5 and is grounded to the shielding body 5. The shielding body 5 and the shielding cover 6 are made of metal material. When the shielding body 5 is grounded to the measuring component, the shielding body 5 can shield the interference signal of the external environment of the shielding body 5, so that the measuring component can measure the cable 8 at the outlet of the hard pressing plate more accurately. It can be understood that when the shielding cover 6 covers the top opening of the shielding body 5, it will contact the shielding body 5. Due to the conductivity of the metal, when measuring the cable 8, the shielding body 5 and the shielding cover 6 are both grounded. In other embodiments, the shielding body 5 and the shielding cover 6 can also be made of insulating material, and then sprayed with conductive paint inside to achieve shielding of interference signals of the environmental electric field outside the cable 8 at the outlet of the hard pressing plate.

[0101] Furthermore, the shielding body 5 includes a shielding body bottom plate 52 , on which a measuring port 51 corresponding to the position of the protection measuring port 21 is opened, and the protection measuring port 21 corresponds to the collection end in the measuring component through the measuring port 51 .

[0102] Furthermore, the shielding body 5 also includes 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, and are both connected to the same edge of the measuring port 51, and the two are on the same axis. The first lower extension plate 521 and the fourth lower extension plate 524 are arranged at intervals, and are both connected to the same edge of the measuring port 51, and the two 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 the positions correspond to each other, and the third lower extension plate 523 is substantially the same as the fourth lower extension plate 524, and the positions correspond to each other.

[0103] Furthermore, the top end of the first lower extension plate 521 , the top end of the second lower extension plate 522 , the top end of the third lower extension plate 523 , and the top end of the fourth lower extension plate 524 are all connected to the edge of the measuring port 51 .

[0104] In this embodiment, the cable shielding member 7 is connected to the bottom end surface of the shielding body bottom plate 52 and corresponds to the measuring port 51. The cable shielding member 7 can be made of metal material or insulating material. When the cable shielding member 7 is made of insulating material, conductive paint is sprayed on the surface of the cable shielding member 7 facing the shielding body 5. According to the conductivity of the metal or the conductive paint, the cable shielding member 7 is also grounded to the measuring component to shield interference signals outside the cable 8 at the hard pressing plate outlet.

[0105] Specifically, the cable shielding member 7 includes a first front panel 75 , a first rear panel 76 , a second rear panel 77 , a measuring through hole 78 , a first upper extending plate 73 , a second upper extending plate 74 , a first bent plate, and a second bent plate.

[0106] Furthermore, 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 via the second rear panel 77 .

[0107] Furthermore, the end of the second rear panel 77 is connected to the first rear panel 76, and the front end of the second rear panel 77 is a free end and is inclined toward the lower area of ​​the second rear panel 77, so that the second rear panel 77 forms an inclined panel with a low front end and a high 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 protruding structure b.

[0108] 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 in the direction of the shielding body 5, the area below it forms a first groove area 71. 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 in the direction of the shielding body 5, the area below it forms a second groove area 72. Among them, the first groove area 71 and the second groove area 72 are both connected to the measurement through hole 78.

[0109] 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 in the direction of the shielding body 5, the first top plate 712 is respectively connected to the top of the first front end plate 711 and the top of the first rear end plate 713, so that the first front end plate 711, the first top plate 712 and the first rear end plate 713 surround the first groove area 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 in the direction of the shielding body 5, the second top plate 722 is respectively connected to the top of the second front end plate 721 and the top of the second rear end plate 723, so that the second front end plate 721, the second top plate 722 and the second rear end plate 723 surround the second groove area 72.

[0110] In this embodiment, the cable shielding member 7 is grounded and connected to the bottom plate 52 of the shielding body, thereby shielding the interference signal from the external environment. Specifically, the top of the first upper extension plate 73 and / or the top of the second upper extension plate 74 are connected to the edge of the measurement through hole 78. When the shielding body 5 is charged, after the cable shielding member 7 is connected to the shielding body 5, the cable shielding member 7 is also charged to achieve the shielding function.

[0111] In addition, when the cable shielding component 7 is grounded and connected to the bottom plate 52 of the shielding body, the top end surface of the first top plate 712 and the top end surface of the second top plate 722 are also respectively connected to the bottom plate 52 of the shielding body, thereby further ensuring the connection performance between the cable shielding component 7 and the shielding body 5, so that the cable shielding component 7 is also charged to achieve the shielding function.

[0112] In this embodiment, when the protective body 2, the shielding body 5 and the cable shielding component 7 are assembled, first, the shielding body 5 is placed in the protective body 2 so that the opening area a217 corresponds to the measuring port 51; then, the cable shielding component 7 is fixed in the protective measuring port 21 from the bottom of the protective body 2, so that the measuring through hole 78 is connected with the opening area a217 and the measuring port 51 in sequence; finally, the top end of the first upper extension plate 73 and / or the top end of the second upper extension plate 74 is connected to the edge of the measuring through hole 78.

[0113] Furthermore, first, the cable shielding member 7 can be fixed to the bottom end face of the protective body 2 by gluing or fasteners, and the upper end portion of the cable shielding member 7 passes through the protective measuring 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 is connected to the edge of the measuring through hole 78 by welding.

[0114] In this embodiment, when the cable shielding part 7 is fixed on the bottom end face of the protective body 2, the first bent plate passes through the opening area c219, so that the top end face of the first top plate 712 contacts the bottom end face of the shielding body bottom plate 52, and the second bent plate passes through the opening area b218, so that the top end face of the second top plate 722 contacts the bottom end face of the shielding body bottom plate 52. At the same time, the second front end plate 721 blocks the first front wall surface 220, the second lower extension plate 522 blocks the first side wall surface 211, the first upper extension plate 73 blocks the second front wall surface 221, the first lower extension plate 521 blocks the second side wall surface 212, the first front end plate 711 blocks the third front wall surface 222, the first rear end plate 713 blocks the third rear wall surface 226, the fourth lower extension plate 524 blocks the fourth side wall surface 214, the second upper extension plate 74 blocks the second rear wall surface 224, the third lower extension plate 523 blocks the third side wall surface 213, the second rear end plate 723 blocks the first rear wall surface 223, the first front panel 75 blocks the first inner wall surface 215, the first rear panel 76 blocks the second inner wall surface 216, and the second rear panel 77 blocks the third inner wall surface 225. When the cable shielding member 7 is connected to the shielding body 5 , the wall surface of the opening area can achieve the shielding function through the above design.

[0115] Furthermore, the first lower extension plate 521 is located in an area between a side edge of the first upper extension plate 73 and the first front end plate 711, and the 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 an area between a side edge of the first upper extension plate 73 and the second front end plate 721, and the 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 an area between a side edge of the second upper extension plate 74 and the second rear end plate, and the 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 an area between a side edge of the second upper extension plate 74 and the first rear end plate, and the 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. This design can fully block and shield the wall surface of the opening area, further improving the electrical shielding effect.

[0116] When the protruding structure b is wrapped 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 surface 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 toward the position of the shielding shell under the action of external force, and ensure that the lowermost end of the protruding structure b is always located at the lower end of the bottom end surface of the first rear panel.

[0117] 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 measuring port 51, in order to further improve the connection performance between the cable shielding 7 and the shielding 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 also be respectively connected to the cable shielding 7.

[0118] 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 surface 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.

[0119] 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 surface 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.

[0120] 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 surface 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.

[0121] 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 surface 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.

[0122] In this embodiment, a movable plate shielding member 4 is further included. Specifically, the movable plate shielding member 4 is fixed in the upper groove 34 .

[0123] The movable plate shielding member 4 can be made of metal material or insulating material. When the movable plate shielding member 4 is made of insulating material, conductive paint is sprayed on the surface of the movable plate shielding member 4 facing the shielding body 5 .

[0124] When the movable plate 3 moves to the area below the cable shielding member 7, a portion of the movable plate shielding member 4 is also located directly below the cable shielding member 7, shielding the cable shielding member 7 and contacting the lowest end of the protruding structure b in the cable shielding member 7, so that the movable plate shielding member 4 is grounded and connected to the cable shielding member 7, thereby shielding interference signals from the external environment. When the cable shielding member 7 is charged, the movable plate shielding member 4 is also charged to achieve a shielding function.

[0125] At the same time, when the movable plate shielding member 4 blocks the cable shielding member 7 and contacts the lowermost end of the protruding structure b in the cable shielding member 7, the first shielding member, the second shielding member, the third shielding member and the movable plate shielding member form a shielding cavity.

[0126] In this embodiment, when in use, first, the movable plate 3 is moved to the second position; then, the cable 8 is placed in the first cable groove 22, the first groove area 71, the measuring through hole 78, the second groove area 72 and the second cable groove 2112, and the movable plate 3 is moved to the first position to block the measuring through hole 78, the first cable groove 22 and the second cable groove 2112; finally, the measuring component senses the electric field of the cable 8 through the cable measuring hole to measure the voltage of the hard pressure plate.

[0127] In this embodiment, a device connection port is provided on the shielding body 5 , which corresponds to the shielding wire through hole 2110 on the protection body 2 , so as to facilitate the connection between the measuring component and other devices.

[0128] In this embodiment, since the shielding body 5 is placed inside the protective body 2, the top end face of the protective measuring port 21 is abutted against the bottom end face of the shielding body 5. On this basis, the cable shielding part 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 be used to fully block and shield the protective measuring port 21, thereby enhancing the shielding performance of the protective measuring port 21 against interference signals in the external environment, improving the accuracy of voltage measurement, and obtaining the insertion and retraction state of the hard pressure plate.

[0129] In this embodiment, the movable plate shielding member 4 shields the cable shielding member 7 and is connected to the cable shielding member 7 via the protruding structure b, so that the movable plate shielding member 4 can realize the shielding function of the cable measuring hole.

[0130] In this embodiment, the protection measuring port can be fully blocked and shielded by 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, so that the protection measuring port becomes a part of the shielding cavity, and the wall surface of the protection measuring port can be fully blocked to prevent interference signals from entering the cable measurement area through the wall surface of the protection measuring port.

[0131] In this embodiment, the cable shielding member 7, the movable 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 measuring end of the cable 8 is placed in the shielding cavity, the shielding performance of the interference signal in the external environment can be enhanced, the accuracy of the voltage measurement can be improved, and the insertion and retraction state of the hard pressure plate can be obtained.

[0132] In this embodiment, when the cable shielding part 7 is connected to the shielding body 5 located in the protective body 2, the protective body 2 is located between the cable shielding part 7 and the shielding body 5, which can increase the connection performance among the cable shielding part 7, the protective body 2 and the shielding body 5.

[0133] In this embodiment, since the cable shielding member 7 can be directly connected to the shielding body 2 after passing through the protective measuring port 21, compared with the prior art, there is no need to provide a connecting shielding member between the cable shielding member and the shielding body.

[0134] Embodiment 2

[0135] This embodiment provides an assembly method of a hard pressing plate voltage monitoring device, which is used to assemble the hard pressing plate voltage monitoring device in the above-mentioned embodiment 1, and includes the following steps:

[0136] S1. The measuring component is placed inside the shielding shell;

[0137] S2, the shielding shell is placed inside the insulating protective shell, the top end face of the protective measuring port is abutted against the bottom end face of the shielding body, the collection end of the measuring component corresponds to the measuring port and the protective measuring port in sequence, and the first shielding component connected to the edge of the measuring port extends downward to cover the first part of the protective measuring port;

[0138] S3. The cable shielding component is assembled on the bottom end face of the insulating protective shell from bottom to top, and the measuring through holes correspond to the protective measuring port and the measuring through holes in sequence. After the second shielding component in the cable shielding component passes through the protective measuring port, at least a part of it is connected to the shielding shell to shield the second part of the protective measuring port. The third shielding component in the cable shielding component covers and shields the bottom end face of the third part of the protective measuring port. The first shielding component, the second shielding component and the third shielding component make the protective measuring port a part of the shielding cavity.

[0139] Embodiment 3

[0140] like Fig.18 As 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 the first embodiment. The collector 11 includes at least one communication aerial plug 13 and at least one probe connection aerial plug 12. The probe connection aerial plug 12 of the collector 11 and the hard pressure plate voltage monitoring device 10 are connected through a shielded line 9. The hard pressure plate voltage monitoring device 10 is used to detect the voltage of the hard pressure plate outlet cable and output the voltage analog signal of the cable 8 at the hard pressure plate outlet; the collector 11 is used to obtain the insertion and withdrawal status 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 line 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, i.e., voltage data according to the voltage analog signal sent by the probe interface module, and obtain the insertion and withdrawal status of the hard pressure plate according to the judgment of the voltage data.

[0141] In order to ensure the safe use of power supply, the collector 11 also 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, overvoltage protection, undervoltage protection, overcurrent protection, voltage stabilization, and noise reduction; the power supply module is used to provide power for the single-chip microcomputer module.

[0142] In order to ensure that the connected devices will not affect the single-chip microcomputer module, the collector also includes a serial port communication module and a serial port protection module. The serial port protection module is electrically connected to the serial port communication module, and the serial port communication module is electrically connected to the single-chip microcomputer module. The serial port protection module is used to protect the serial port communication module to prevent the occurrence of voltage surges from causing damage to the serial port communication module and the single-chip microcomputer module. The serial port communication module is used to establish communication with other devices and can send the status of the hard pressure plate.

[0143] In order to reduce the workload of the staff who need to regularly check the hard platen information, a hard platen voltage monitoring system is established to realize the centralized collection of the status information of the hard platen. The embodiment of the present application provides a hard platen voltage monitoring method, which is applied to the collector in the hard platen voltage monitoring system. By analyzing and judging the acquired voltage data of the hard platen, the activation and deactivation status of the hard platen is determined. The main process of the method is described as follows.

[0144] Embodiment 4

[0145] like Fig.19 As shown, this embodiment provides an assembly method of a hard pressing plate voltage monitoring device, which is used to assemble the hard pressing plate voltage monitoring device in the above-mentioned embodiment 1, and includes the following steps:

[0146] Step S201: Acquire a voltage data set of a hard pressing plate within a preset time period.

[0147] Specifically, the voltage of the cable at the outlet of the hard pressure plate can be detected by the hard pressure plate voltage monitoring device, and then the data measured by the hard pressure plate voltage monitoring device is sent to the collector, and the collector obtains the voltage data measured by the hard pressure plate voltage monitoring device. The voltage data in the recent period is obtained to form a voltage data set. For example, if the preset time period is ten minutes, the voltage data at the current time and the previous ten minutes are obtained to form a voltage data set.

[0148] The preset time period is determined by:

[0149] Obtain a decay change waveform diagram of the monitoring voltage of the hard pressing plate under different environments. The decay change waveform diagram refers to the voltage change of the hard pressing plate. In a specific implementation, the horizontal axis of the decay change waveform diagram is time, and the vertical axis is the voltage of the hard pressing plate. It should be understood that the voltage change of the hard pressing plate is different under different environments. Different environments mean that at least one factor such as humidity and air pressure of the two environments is different. At the same time, the wire materials of the hard pressing plate are different, and the voltage change is also different. In a specific implementation, two decay change waveform diagrams are obtained, and the humidity of the environment 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 diagram, calculate the decay time under different environments. The decay time refers to the time it takes for the voltage to drop to a specified value when the hard pressing plate switches from the input state to the exit state. The specified value is set by the staff according to the actual situation. The maximum value of the decay time under different environments is used as the preset time period.

[0150] Step S202: Calculate the difference between the maximum value and the minimum value in the voltage data set.

[0151] Step S203: Determine the insertion and retraction status of the hard pressing plate according to the difference.

[0152] When the difference is greater than the preset difference value, the in-and-out state of the hard pressure plate is switched. For example, the current state of the hard pressure plate is the in-state, and when the difference is greater than the preset difference value, the state of the hard pressure plate is changed from the in-state to the out-state. For another example, the current state of the hard pressure plate is the out-state, and when the difference is greater than the preset difference value, the state of the hard pressure plate is changed from the out-state to the in-state.

[0153] In a specific implementation, take the example of the DC voltage of 110V when the hard pressing plate is in the input state. Fig. 20, including the hard pressure plate exit state s0, in which the voltage is always 0V; when the hard pressure plate is in the input state, corresponding to part s1, the voltage value Uo output by the hard pressure plate voltage monitoring device 10 rises in a short time and stabilizes at 110V; when the hard pressure plate is exited or disconnected due to unreliable connection, corresponding to part s2, the voltage waveform changes to the slow decay discharge process of the suspended metal body. Set the decay change value Δy to the difference between the stable voltage 110V and 10% of the stable voltage 110V, that is, Δy=110V-110V×10%, under two different humidity conditions, 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.

[0154] Due to changes in the environment, the decay time Δt will vary greatly. Fig. 20 , set the time threshold ΔT, i.e. the preset time period, with a larger decay time Δt. The output voltage value Uo of the monitoring device has been stable at around 110V, and the state of the hard pressure plate is considered to be in operation. However, due to changes in the external environment, Uo jumps in ΔT. Within the ΔT time, if the maximum change of Uo is less than Δy, it is considered that the state of the hard pressure plate has not changed. If the maximum change of Uo is not less than Δy, it is considered that the state of the hard pressure plate has changed. Δy is the preset value of the difference.

[0155] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. An improved structure of 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 formed on a bottom end surface thereof; A measuring port corresponding to the protective measuring port is provided on the bottom end surface of the shielding shell, and a first shielding component extending downward to form a first portion of the protective measuring port is provided at the edge of the measuring port; The cable shielding member is mounted on the insulating protective shell, and includes a measuring through hole, and an upper end portion and a lower end portion connected thereto, wherein the upper end portion passes through the protective measuring port, and at least a portion thereof is connected to the shielding body to form a second shielding component that shields the second portion of the protective measuring port, and the lower end portion forms a third shielding component that covers and shields the bottom end surface of the third portion of the protective measuring port; The first shielding component, the second shielding component and the third shielding component make the protection measurement port a part of the shielding cavity.

2. The improved structure of the hard platen voltage monitoring device according to claim 1 is characterized in that: The first shielding assembly 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.

3. The improved structure of the hard platen voltage monitoring device according to claim 1 is characterized in that: The upper end portion includes a first upper extension plate, a second upper extension plate, a first bent plate and a second bent plate. After the upper end portion passes 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, 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 measuring through hole is located on the lower end portion, and the measuring through hole is sequentially connected with the protection measuring port and the measuring port to form a cable measuring hole.

4. The improved structure of the hard platen voltage monitoring device according to claim 3 is 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.

5. The improved structure of the hard platen voltage monitoring device according to claim 4 is characterized in that: 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 a protruding structure b.

6. The improved structure of the hard platen voltage monitoring device according to any one of claims 1 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 component shields a first portion of the first wall surface and a first portion of the second wall surface, and the second shielding component 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 improved structure of the hard platen voltage monitoring device according to claim 6 is 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 improved structure of the hard platen voltage monitoring device according to claim 7 is 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 improved structure of the hard platen voltage monitoring device according to claim 8 is characterized in that: A first slide rail and a second slide rail arranged in parallel are provided on the bottom end surface of the insulating protective shell, 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.

10. The improved structure of the hard platen voltage monitoring device according to claim 9 is 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 groove, 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 groove; Wherein, the first cable trough is communicated with the opening area b, and the second cable trough is communicated with the opening area c.

11. The improved structure of the hard platen voltage monitoring device according to claim 10 is characterized in that: The bottom end surface of the insulating protective shell is also provided with a movable plate which can move in the horizontal direction to shield the cable shielding member, and the top end surface of the movable plate is provided with a movable plate shielding member facing the cable shielding member, wherein: When the movable plate moves horizontally on the bottom end surface of the insulating protective shell through the first sliding rail and the second sliding rail to cover the cable shielding, the first cable trough and the second cable trough, the movable plate shielding covers and contacts a part of the cable shielding, and the movable plate shielding has a shielding function.

12. An assembly method of a hard pressing plate voltage monitoring device, used for assembling the hard pressing plate voltage monitoring device according to any one of claims 1 to 11, characterized in that: The following steps are involved: S1. The measuring component is placed inside the shielding shell; S2, the shielding shell is placed inside the insulating protective shell, the top end face of the protective measuring port is abutted against the bottom end face of the shielding body, the collection end of the measuring component corresponds to the measuring port and the protective measuring port in sequence, and the first shielding component connected to the edge of the measuring port extends downward to cover the first part of the protective measuring port; S3. The cable shielding component is assembled on the bottom end face of the insulating protective shell from bottom to top, and the measuring through holes correspond to the protective measuring port and the measuring through holes in sequence. After the second shielding component in the cable shielding component passes through the protective measuring port, at least a part of it is connected to the shielding shell to shield the second part of the protective measuring port. The third shielding component in the cable shielding component covers and shields the bottom end face of the third part of the protective measuring port. The first shielding component, the second shielding component and the third shielding component make the protective measuring port a part of the shielding cavity.

13. 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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