A multi-partition quick-locking protection anti-theft type electric energy meter box

Abstract

The present application relates to the technical field of electric energy metering box, disclose a kind of multi-partition quick locking protection theft-proof electric energy metering box, including shell, the inside of the shell is equipped with electronic components, the inside of the shell is equipped with moving mechanism, the moving mechanism is used to protect part component, the inside of the shell is equipped with locking mechanism, the locking mechanism is used to prevent the shell is violently disassembled. By clamping plate under the action of second spring release T-shaped rod, trigger first tension spring pull terminal base in sliding frame backward sliding, the displacement is through the mechanical linkage of first rotating column, connecting rod and second rotating column, drive baffle to move down to form physical obstruction in square groove block;Special-shaped block is matched with rail and is under the action of first spring to realize jam self-locking, prevent baffle to be forcibly pulled open, subsequent can be reset by square groove block and opened, give consideration to the security of anti-damage and the convenience of compliance maintenance.

Description

Technical Field

[0001] This invention relates to the field of electricity meter box technology, specifically to a multi-zone, fast-locking, and protective anti-theft electricity meter box. Background Technology

[0002] As a core terminal device for electricity metering and settlement in smart grids, the security and accuracy of electricity meter boxes directly affect the economic benefits of power supply companies and the management order of the power grid. With technological advancements, methods of electricity theft and vandalism targeting electricity meter boxes are constantly evolving. These methods primarily include the violent dismantling and destruction of the meter box casing and terminals, as well as the injection of energy into the meter box using high-frequency pulses or strong electromagnetic interference devices to tamper with metering data or directly damage core circuits. To prevent these acts of vandalism, the research and application of anti-theft electricity meter boxes have become an inevitable requirement.

[0003] Currently, conventional anti-theft electricity meter boxes in the industry typically employ physical protection methods such as one-time lead seals, ultrasonic welding, or protective covers to isolate the gaps between the meter casing and the perimeter of the wiring terminals. They rely on fastening screws and plastic clips to maintain the overall assembly structure of the casing. In terms of electrical protection, they usually connect basic surge protection devices such as varistors and transient voltage suppression diodes in parallel at the power input or communication interface to provide an energy discharge channel when encountering sudden external high voltage. At the same time, they rely on software-level data verification logic to identify abnormal communication and data modification commands.

[0004] While existing technologies have increased the difficulty of damaging electricity meter boxes to some extent, some shortcomings remain: In terms of physical protection, conventional terminal protective covers only provide passive static shielding. Once the external lead seal or outer casing is forcibly broken, the internal wiring terminals are immediately exposed. Existing structures cannot convert illegal disassembly actions into driving forces that trigger internal physical isolation, lacking a dynamic defense mechanism that achieves internal shielding and self-locking at the moment of damage. At the same time, existing casing assembly structures mainly rely on the physical yield strength of static fasteners. When faced with continuous violent prying, the casing is very prone to deformation or even separation along the stress point. It fails to utilize the initial relative displacement generated by the casing under stress to trigger a deeper locking mechanism, resulting in limited overall resistance to violent damage. In terms of electrical and data protection, traditional surge protection devices can only perform basic voltage clamping at exposed ports. Since the various functional areas inside the electricity meter box usually share the same reference ground and data communication bus, when subjected to continuous injection of high-frequency, high-power electromagnetic energy, the interference energy can easily cross the input port and penetrate directly to the core metering area along the common ground or data transmission link, causing the internal control chip to be physically damaged or the metering data in the memory to be forcibly rewritten. Furthermore, relying solely on software-level verification and protection often fails to function when the hardware is subjected to strong electromagnetic shocks and falls into operational abnormality. Existing technologies have failed to achieve active interception of interference energy and forced physical locking of data links from the perspective of physical independence and electrical isolation switching of the system architecture. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multi-zone, fast-locking, and protective anti-theft electricity meter box, which solves the problem that existing electricity meter boxes lack dynamic physical locking mechanisms and electrical data cross-zone isolation and disconnection mechanisms when subjected to violent dismantling and external strong electromagnetic energy injection.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-zone, fast-locking, and protective anti-theft electricity meter box, comprising a housing, electronic components installed inside the housing, a moving mechanism installed on the inner side of the housing for protecting certain components, and a locking mechanism installed inside the housing for preventing the housing from being forcibly disassembled.

[0007] Preferably, the moving mechanism includes a sliding frame, which is fixedly connected inside the housing. A terminal base is slidably connected to the inner side of the sliding frame. Two first tension springs are fixedly connected to the rear side of the terminal base. First rotating columns are rotatably connected to both sides of the terminal base. A connecting rod is fixedly connected to the top of the first rotating column. A second rotating column is fixedly connected to the top of the connecting rod. A baffle is rotatably connected to the front side of the second rotating column. Two irregularly shaped blocks are fixedly connected to the bottom of the baffle. A square groove block is fixedly connected to the bottom of the sliding frame. Multiple first springs are fixedly connected to the inner side of the square groove block. A railing is fixedly connected to the other end of the multiple first springs. Multiple third springs are slidably connected to the inner side of the square groove block. Two T-shaped rods are fixedly connected to the front side of the terminal base.

[0008] Preferably, the locking mechanism includes a first guide sleeve, which is fixedly connected to the inner side of the housing. A second guide sleeve is fixedly connected to the rear side of the first guide sleeve. A pin is slidably connected to the inner side of the second guide sleeve. An energy-storing spring is fixedly connected to the rear end of the pin. The other end of the energy-storing spring is fixedly connected to the rear side of the housing. Two engaging grooves are provided on the outer side of the pin. Two locking blocks are slidably connected to the inner side of the first guide sleeve. A connecting plate is fixedly connected to the opposite side of each of the two locking blocks. Two telescopic rods are fixedly connected to the opposite side of each of the two connecting plates. A rotating round rod is rotatably connected to the opposite side of each of the two connecting plates. A bent rod is fixedly connected to the rear side of each of the two rotating round rods. A connecting thin rod is fixedly connected to the middle of the bent rod. The other end of the connecting thin rod is fixedly connected to the inner wall of the housing.

[0009] Preferably, a display screen is fixedly connected to the front side of the housing, and a plurality of buttons are provided at the bottom of the display screen, the buttons being fixedly connected to the front side of the housing.

[0010] Preferably, the top of the housing has multiple equidistant insertion holes, and the outer side of the housing has two connection holes.

[0011] Preferably, the electronic component has two mounting plates fixedly connected to its rear side, and two clamping plates slidably connected to the rear side of the mounting plates, with a second spring fixedly connected between the two clamping plates.

[0012] Preferably, the inner side of the first guide sleeve is slidably connected with a plurality of engaging rings, and a fourth spring is fixedly connected to the opposite side of each of the plurality of engaging rings.

[0013] Preferably, the engaging ring engages in the middle of the engaging groove, and the engaging block engages in the outer side of the pin.

[0014] Preferably, the railing is slidably connected to the inner side of the square groove block and to the outer side of the third spring.

[0015] Preferably, the railing is slidably connected to the outside of the irregular block, and the T-shaped bar is engaged between the two clamping plates.

[0016] This invention provides a multi-zone, fast-locking, anti-theft energy meter box, which also includes a state machine and metering, main control, communication, and terminal areas that are physically and electricalally independent. The communication and terminal areas are each equipped with a crowbar circuit connected between the positive power supply terminal and the local ground wire of the corresponding zone. An isolation array is connected in series between the local ground wire and the reference ground of both the communication and terminal areas. The state machine is connected to the metering, main control, communication, and terminal areas respectively, and is equipped with a reference clock source and a backup power supply circuit independent of the main power supply line. The state machine is used to synchronously collect the power rail voltage and ripple envelope amplitude of each zone according to the system sampling period to calculate the voltage drop gradient. Furthermore, when the voltage drop gradient and ripple envelope amplitude of a specific partition meet the set trigger conditions, a trigger level is output to the crowbar circuit corresponding to the partition that meets the trigger conditions, so as to short-circuit the externally injected energy to the local ground line. The state machine is also used to remove the drive signal of the corresponding isolation array after a set dead time delay to disconnect the connection between the local ground line and the reference ground, and put the memory in the metering area into a hardware write-protected state.

[0017] The state machine calculates the voltage sag gradient for each region by dividing the difference between the power rail voltage at the current sampling moment and the power rail voltage at the previous sampling moment by the system sampling period. It then constructs a difference matrix by combining the voltage sag gradient of each region with the ripple envelope amplitude. The expression for the constructed difference matrix is: ; In the formula, express The difference matrix at time points; to These represent the voltage drop gradients of the first to fourth zones, respectively. to These represent the ripple envelope amplitudes of the first to fourth zones, respectively. The first to fourth zones correspond to the metering area, main control area, communication area, and terminal area, respectively. The state machine uses the constructed difference matrix to determine the trigger condition; the logical expression for the trigger condition is: ; In the formula, Indicates the first Each partition The trigger status bit at any given moment; This indicates the set positive slope threshold. This indicates the set threshold for the envelope amplitude. When the trigger status bit of a specific partition is true, the state machine records the current system clock cycle as the trigger time and enters the protection execution state.

[0018] The state machine's drive pin is connected to the control pin of the isolation array. A clamping array is connected in parallel between the drain and source of the isolation array. The state machine is equipped with a delay counter. The set dead time delay is greater than the avalanche conduction setup time of the crowbar circuit. After the state machine reaches the dead time delay, it cancels the drive signal. The isolation array turns off and blocks the electrical connection between the local ground and the reference ground. The clamping array absorbs the voltage spikes generated at the drain and source during this process.

[0019] An optocoupler network is installed between the metering area, main control area, communication area, and terminal area. At the same time that the state machine outputs a trigger level to the crowbar circuit, it outputs a high-level signal to the hardware write protection pin of the memory to lock the write operation bus. At the same time, it disconnects the enable power supply of the optocoupler network between the partition that meets the trigger condition and the main control area, blocking the data transmission link across partitions.

[0020] At the trigger moment, the state machine writes the current difference matrix into its internal non-volatile memory and disconnects the hardware link between the main control area and the external control bus, putting the system into a locked state. The state machine is equipped with a local communication port to receive the handshake pulse sequence from the external physical token input. When the handshake pulse sequence matches the pre-stored verification parameters, the state machine clears the non-volatile memory, restores the hardware link between the main control area and the external control bus, and re-outputs the activation drive signal to the isolation array.

[0021] Another aspect of the present invention provides a control system for an anti-theft electricity meter box, applied to the anti-theft electricity meter box provided in the first aspect of the present invention. This control system is integrated within a state machine and includes a data acquisition module, a judgment module, a switching module, and a reset module.

[0022] The acquisition module is used to synchronously acquire the power rail voltage and ripple envelope amplitude of the metering area, main control area, communication area and terminal area according to the system sampling cycle, and calculate the voltage drop gradient of each zone.

[0023] The determination module is connected to the acquisition module and is used to construct a difference matrix by combining the voltage drop gradient and ripple envelope amplitude of each partition, and to execute the trigger condition determination logic using a logic gate array. The determination module outputs a trigger command and records the trigger time when the trigger status bit of any partition is true.

[0024] The switching module is connected to the judgment module and is used to receive the trigger command output by the judgment module. At the trigger time, it outputs the trigger level to the crowbar circuit corresponding to the partition that meets the trigger condition, and cancels the drive signal of the isolation array of the corresponding partition after the dead delay time.

[0025] The reset module is connected to both the judgment module and the switching module. At the trigger moment, it outputs a high-level signal to the hardware write-protect pin of the metering area's internal memory and disconnects the enable power supply to the optocoupler network between the partition meeting the trigger condition and the main control area to block the data transmission link. The reset module writes the differential matrix at the trigger moment into a non-volatile memory cell. When the handshake pulse sequence received through the local communication port matches the pre-stored verification parameters, it sends a reset level signal to the switching module to restore the isolation array's conduction state.

[0026] This invention provides a multi-zone, fast-locking, anti-theft electricity meter box. It has the following advantages: 1. When the electricity meter box is illegally disassembled, the clamping plate releases the T-shaped rod under the action of the second spring, triggering the first tension spring to pull the terminal base to slide backward in the sliding frame. This displacement is achieved through the mechanical linkage of the first rotating column, the connecting rod and the second rotating column, which drives the baffle to move downward into the square slot to form a physical barrier. The irregular block cooperates with the railing and achieves self-locking under the action of the first spring, preventing the baffle from being forcibly pulled open. It can be opened by resetting the square slot later, which takes into account both the anti-vandalism security and the convenience of compliant maintenance.

[0027] 2. When the housing is displaced due to violent disassembly, the present invention can directly pull the connecting rod. Through the guiding linkage of the bending rod, rotating rod and telescopic rod, the connecting plate drives the locking block to loosen. At this instant, the energy storage spring releases its elastic force to push the pin to slide quickly in the second guide sleeve. Under the action of the fourth spring, multiple locking rings are quickly locked in the locking groove of the pin. This design cleverly uses the displacement generated by the destructive action as the trigger source. The clamping of the locking block and the locking of the locking rings form a double fixation, realizing the instantaneous locking of the locking mechanism and greatly improving the ability of the electricity meter box housing to resist violent damage.

[0028] 3. This invention divides the electricity meter box into multiple physically and electrically independent zones and uses a state machine to monitor the voltage drop gradient and ripple envelope amplitude of the power rails in each zone in real time. This enables accurate identification of external energy injection interference. Combined with the energy discharge of the crowbar circuit and the floating ground switching of the isolation array, interference can be confined to the external interface zone and the electrical connection path can be cut off before it enters the core metering area, effectively preventing the physical damage of the internal circuits to external energy injection. Combined with the data link blocking of the optocoupler network and the hardware write protection of the memory, the data writing and transmission paths are locked simultaneously during the protection execution, improving the data security performance and system stability of the electricity meter box in a strong electromagnetic interference environment. Attached Figure Description

[0029] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a side view of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is a cross-sectional view of the moving mechanism of the present invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a cross-sectional view of the locking mechanism of the present invention; Figure 8 for Figure 7 Enlarged view at point B in the middle; Figure 9 This is a topology diagram of the electricity meter box system of the present invention; Figure 10 This is a flowchart of the control method of the present invention; Figure 11 This is a logic structure diagram of the power meter box control module of the present invention.

[0030] The components include: 1. Housing; 2. Moving mechanism; 21. Terminal base; 22. Sliding frame; 23. First tension spring; 24. Square slot block; 25. First rotating column; 26. Connecting rod; 27. Irregular block; 28. First spring; 29. ​​Railing; 210. Mounting plate; 211. Clamping plate; 212. Second rotating column; 213. Second spring; 214. T-shaped rod; 215. Third spring; 216. Baffle; 3. Locking mechanism; 31. First guide sleeve; 32. Second guide sleeve; 33. Engaging ring; 34. Fourth spring; 35. Locking block; 36. Pin; 37. Engaging groove; 38. Energy storage spring; 39. Connecting plate; 310. Connecting rod; 311. Telescopic rod; 312. Bending rod; 313. Rotating round rod; 4. Display screen; 5. Socket hole; 6. Button; 7. Electronic components; 8. Connecting hole. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see the appendix Figure 1 - Appendix Figure 6 This invention provides a multi-zone fast-locking and protective anti-theft electricity meter box, including a housing 1, an electronic component 7 installed inside the housing 1, a moving mechanism 2 installed on the inner side of the housing 1, the moving mechanism 2 being used to protect some components, and a locking mechanism 3 installed inside the housing 1, the locking mechanism 3 being used to prevent the housing 1 from being forcibly disassembled. The moving mechanism 2 includes a sliding frame 22, which is fixedly connected inside the housing 1. A terminal base 21 is slidably connected to the inner side of the sliding frame 22. Two first tension springs 23 are fixedly connected to the rear side of the terminal base 21. First rotating columns 25 are rotatably connected to both sides of the terminal base 21. A connecting rod 26 is fixedly connected to the top of the first rotating column 25. A second rotating column 212 is fixedly connected to the top of the connecting rod 26. A baffle 216 is rotatably connected to the front side of the second rotating column 212. Through the installation of the first tension springs 23, the terminal base 21 can be pulled backward, thereby moving backward through the first rotating columns 25. As the connecting rod 26 and the second rotating column 212 move, the baffle 216 will move downwards to protect the terminal base 21. Two irregular blocks 27 are fixedly connected to the bottom of the baffle 216, and a square groove block 24 is fixedly connected to the bottom of the sliding frame 22. Multiple first springs 28 are fixedly connected to the inner side of the square groove block 24, and a railing 29 is fixedly connected to the other end of the multiple first springs 28. Multiple third springs 215 are slidably connected to the inner side of the square groove block 24. Two T-shaped rods 214 are fixedly connected to the front side of the terminal base 21. The baffle 216 is prevented from being lifted by the engagement of the irregular blocks 27 and the railing 29. Two mounting plates 210 are fixedly connected to the rear side of the electronic component 7. Two clamping plates 211 are slidably connected to the rear side of the mounting plates 210. A second spring 213 is fixedly connected between the two clamping plates 211 and is engaged between the clamping plates 211 by a T-shaped rod 214, so that it can respond quickly when the housing 1 is violently broken. The railing 29 is slidably connected to the inner side of the square slot block 24, the outer side of the third spring 215, and the outer side of the irregular block 27. The T-shaped rod 214 is engaged between the two clamping plates 211.

[0033] Please see the appendix Figure 7 - Appendix Figure 8In a preferred embodiment of the present invention, the locking mechanism 3 includes a first guide sleeve 31, which is fixedly connected to the inner side of the housing 1. A second guide sleeve 32 is fixedly connected to the rear side of the first guide sleeve 31. A pin 36 is slidably connected to the inner side of the second guide sleeve 32. An energy storage spring 38 is fixedly connected to the rear end of the pin 36. The other end of the energy storage spring 38 is fixedly connected to the rear side of the housing 1. The energy storage spring 38 releases its stored elastic force, pushing the pin 36 to slide forward inside the second guide sleeve 32. Two engaging grooves 37 are provided on the outer side of the pin 36. Two locking blocks 35 are slidably connected to the inner side of the first guide sleeve 31. A connecting plate 39 is fixedly connected to the opposite side of each of the two locking blocks 35. Two telescopic rods 311 are fixedly connected to the side. Rotating round rods 313 are rotatably connected to the opposite side of the two connecting plates 39. A bent rod 312 is fixedly connected to the rear side of the two rotating round rods 313. A connecting thin rod 310 is fixedly connected to the middle of the bent rod 312. The other end of the connecting thin rod 310 is fixedly connected to the inner wall of the housing 1. When the housing 1 is violently disassembled and relative displacement occurs, the connecting thin rod 310 fixed to the inner wall of the housing 1 will be pulled. The connecting thin rod 310 will then drive the bent rod 312 to move. The bent rod 312 will then drive the two rotating round rods 313 to move, so that the two connecting plates 39 will move in relative linkage under the support and guidance of the two telescopic rods 311, thereby causing the two locking blocks 35 to slide towards each other and causing the locking blocks 35 to be released. A display screen 4 is fixedly connected to the front side of the housing 1. Multiple buttons 6 are provided at the bottom of the display screen 4. The buttons 6 are fixedly connected to the front side of the housing 1. Multiple insertion holes 5 are equidistantly opened on the top of the housing 1. Two connection holes 8 are opened on the outer side of the housing 1. Multiple locking rings 33 are slidably connected to the inner side of the first guide sleeve 31. A fourth spring 34 is fixedly connected to the opposite side of each locking ring 33. The locking rings 33 are engaged in the middle of the locking grooves 37. The locking block 35 is engaged in the outer side of the pin 36. During the movement of the pin 36, the multiple locking rings 33 are quickly engaged in the middle of the two locking grooves 37 opened on the outer side of the pin 36 under the contraction elastic force of the fourth spring 34. The pin 36 is fixed by the clamping of the outer side of the pin 36 by the locking block 35 and the locking of the locking grooves 37 by the locking rings 33.

[0034] See attached document Figure 9 , Figure 9 This is a topology diagram of an electricity meter box system according to an embodiment of the present invention. The present invention provides an anti-theft electricity meter box, including electronic components 7, a state machine, a metering area, a main control area, a communication area, and a terminal area.

[0035] The metering area, main control area, communication area, and terminal area are physically and electrically independent. An optocoupler network connects these areas. This network isolates the data buses between the different zones.

[0036] The state machine is connected to the metering area, main control area, communication area, and terminal area. The state machine is equipped with a reference clock source and a backup power supply circuit. A memory is located inside the metering area. The control pins of the state machine are connected to the hardware write-protection pins of the memory.

[0037] The communication area and terminal area are equipped with a crowbar circuit. The two ends of the crowbar circuit are connected to the positive power supply terminal and the local ground wire of the corresponding zone, respectively. The trigger control terminal of the crowbar circuit is connected to the drive signal output pin of the state machine.

[0038] An isolation array is connected in series between the local ground line and the reference ground in the communication area. An isolation array is also connected in series between the local ground line and the reference ground in the terminal area. The drive pins of the state machine are connected to the control pins of the isolation array. A clamping array is connected in parallel across the drain and source terminals of the isolation array.

[0039] See attached document Figure 10 , Figure 10 This is a flowchart of a control method according to an embodiment of the present invention. The present invention provides a control method that may include the following steps: In step S100, the state machine synchronously collects the power rail voltage and ripple envelope amplitude of the metering area, main control area, communication area, and terminal area according to the system sampling period. The state machine uses the difference between the power rail voltage at the current sampling moment and the power rail voltage at the previous sampling moment, divided by the system sampling period, to calculate the voltage drop gradient of each zone.

[0040] In step S200, the state machine combines the voltage drop gradient and ripple envelope amplitude of each partition to construct a difference matrix. The expression for the constructed difference matrix is: ; In the formula, express The difference matrix at time step; to These represent the voltage drop gradients of the first to fourth zones, respectively. to These represent the ripple envelope amplitudes of the first to fourth zones, respectively. The first to fourth zones correspond to the aforementioned metering area, main control area, communication area, and terminal area. The state machine executes a condition determination; when the characteristic parameters of a specific zone meet the trigger condition, the state machine records the trigger time and enters the protection execution state. The logical expression for this trigger condition is: ; In the formula, Indicates the first Each partition The trigger status bit at any given moment; This indicates the set positive slope threshold; This indicates the set threshold value for the envelope amplitude. When the trigger status bit of a certain partition is true, the partition is determined to meet the trigger condition.

[0041] In step S300, at the trigger moment, the state machine outputs a trigger level to the crowbar circuit corresponding to the partition that meets the trigger condition, so as to conduct the crowbar circuit to short-circuit the externally injected energy to the local ground line. After the dead time delay, the state machine cancels the drive signal of the isolation array corresponding to the partition, cuts off the connection between the local ground line and the reference ground, and the drain voltage spike generated when the isolation array is turned off is absorbed by the clamping array. At the trigger moment, the state machine sets the write protection pin of the memory to a high level and disconnects the enable power supply of the optocoupler network between the trigger partition and the main control area.

[0042] In step S400, the state machine writes the differential matrix at the trigger moment into the internal register and disconnects the connection link between the main control area and the external control bus. The state machine receives the handshake pulse sequence sent by the external physical token from the local port input, and performs the internal register clearing and isolation array reconnection operation after the verification is successful.

[0043] See attached document Figure 11 , Figure 11 This is a logic structure diagram of an electricity meter box control module according to an embodiment of the present invention. The present invention provides an anti-theft electricity meter box control system, including: a data acquisition module, a judgment module, a switching module, and a reset module.

[0044] The state machine integrates a data acquisition module, a decision module, a switching module, and a reset module.

[0045] The acquisition module is used to synchronously acquire the power rail voltage and ripple envelope amplitude of the metering area, main control area, communication area and terminal area according to the system sampling cycle, and calculate the voltage drop gradient of each zone.

[0046] The acquisition module is internally equipped with a comparator and an analog-to-digital converter. The acquisition module outputs the system sampling period signal based on a reference clock source.

[0047] The acquisition module extracts the power rail voltage data at the current sampling moment and the power rail voltage data at the previous sampling moment in each system sampling cycle. The acquisition module obtains the voltage drop gradient value by calculating the difference between the two and dividing it by the system sampling cycle.

[0048] The determination module is connected to the acquisition module. The determination module combines the voltage sag gradient and ripple envelope amplitude of each partition to construct a difference matrix and executes the trigger condition determination logic. Based on the expression for constructing the difference matrix in the preceding steps, the determination module combines the voltage sag gradient and ripple envelope amplitude of each partition to generate the current difference matrix.

[0049] The decision module includes a logic gate array. It uses this array to compare the voltage drop gradient of each partition with the positive slope threshold, and simultaneously compares the ripple envelope amplitude of each partition with the envelope amplitude threshold. The decision module then performs the decision operation based on the logical expression of the trigger condition from the preceding steps.

[0050] When the voltage drop gradient of a specific partition is less than the negative value of the positive slope threshold, and the ripple envelope amplitude of that partition is greater than the envelope amplitude threshold, the determination module sets the trigger state of that specific partition to true.

[0051] The determination module outputs a trigger command when the trigger status bit of any partition is true, and records the current system clock cycle as the trigger time.

[0052] The switching module is connected to the determination module. The switching module is used to output a trigger level to the crowbar circuit corresponding to the partition that meets the trigger condition at the trigger time, and to withdraw the drive signal of the isolation array corresponding to the partition after the dead time delay.

[0053] The switching module receives the trigger command. The switching module outputs a high-level pulse to the trigger control terminal of the crowbar circuit in the partition where the trigger status bit is true.

[0054] After receiving a high-level pulse, the crowbar circuit is physically connected, and the positive power supply of this zone forms a low-impedance loop with the local ground wire.

[0055] The switching module is equipped with a delay counter. The delay counter starts counting from the trigger moment. The dead time set in the delay counter is greater than the avalanche conduction setup time of the crowbar circuit to ensure that the externally injected energy establishes a stable discharge channel locally. When the timer reaches the dead time, the delay counter outputs a shutdown command.

[0056] The switching module pulls the control electrode level of the isolation array in the corresponding partition low according to the shutdown command. The isolation array in the corresponding partition blocks the electrical connection between the local ground and the reference ground of that partition. When the isolation array is in the shutdown state, the voltage spikes generated at the drain and source terminals are absorbed by the parallel clamping array.

[0057] The reset module is connected to both the determination module and the switching module. The reset module is used to perform data link blocking and subsequent system reset verification operations.

[0058] The reset module outputs a high-level signal to the hardware write protection pin of the internal memory of the metering area at the trigger moment. After receiving the high-level signal, the memory locks the write operation bus.

[0059] At the trigger moment, the reset module outputs a low-level signal to the enable pin of the optocoupler network between the partition with the trigger status bit set to true and the main control area. Upon receiving the low-level signal, the optocoupler network blocks the data transmission link.

[0060] The reset module contains a non-volatile memory unit. The reset module writes the difference matrix data at the trigger moment into the non-volatile memory unit. The reset module disconnects the hardware connection between the main control area and the external control bus, and the state machine enters a deadlock state.

[0061] The state machine is equipped with a local communication port. The reset module receives a handshake pulse sequence from an external physical token input via the local communication port.

[0062] The reset module performs a consistency comparison between the received handshake pulse sequence and the pre-stored verification parameters.

[0063] When the handshake pulse sequence matches the pre-stored verification parameters, the reset module clears the data in the non-volatile storage unit.

[0064] The reset module restores the hardware connection link between the main control area and the external control bus, and sends a reset level to the switching module. After receiving the reset level, the switching module re-outputs the conduction drive signal to the isolation array.

[0065] Working principle: When the anti-theft electricity meter box is illegally dismantled, the T-shaped rod 214 is locked between the two clamping plates 211. Under the action of the second spring 213, the clamping plates 211 release the T-shaped rod 214. At this time, the terminal base 21 is pulled by the two first tension springs 23, thereby sliding backward inside the sliding frame 22. This drives the first rotating column 25 to move backward and, through the connection of the connecting rod 26 and the second rotating column 212, drives the baffle 216 to move downward. When the baffle 216 moves downward to the inside of the square slot block 24, the irregular block 27 presses the railing 29 to move backward. Through the compression and reset of the first spring 28, the irregular block 27 can be locked, thereby preventing the baffle 216 from being pulled open and thus preventing the terminal base 21 from being damaged and stolen. When it is necessary to open, the railing 29 can be moved back to its original position through the square slot opened in the square slot block 24, so that the baffle 216 can be opened. When the housing 1 is violently disassembled and relative displacement occurs, the connecting rod 310 fixed to the inner wall of the housing 1 will be pulled. The connecting rod 310 will then drive the bending rod 312 to move. The bending rod 312 will then drive the two rotating rods 313 to move, so that the two connecting plates 39 will move in relative linkage under the support and guidance of the two telescopic rods 311. This will cause the two locking blocks 35 to slide towards each other, causing the locking blocks 35 to release. At the same time, the energy storage spring 38 releases its stored elastic force, pushing the pin 36 to slide forward inside the second guide sleeve 32. During the movement of the pin 36, multiple locking rings 33 will quickly lock into the middle of the two locking grooves 37 opened on the outside of the pin 36 under the contraction elastic force of the fourth spring 34. Through the clamping of the outer side of the pin 36 by the locking blocks 35 and the locking of the locking grooves 37 by the locking rings 33, the pin 36 is fixed, thereby realizing the rapid locking protection of the locking mechanism 3 and effectively preventing the housing 1 from being violently disassembled.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-zone, fast-locking, anti-theft electricity meter box, comprising a housing (1), characterized in that, Electronic components (7) are installed inside the housing (1). A moving mechanism (2) is installed on the inner side of the housing (1). The moving mechanism (2) is used to protect some parts. A locking mechanism (3) is installed inside the housing (1). The locking mechanism (3) is used to prevent the housing (1) from being forcibly disassembled.

2. The anti-theft electricity meter box with multi-zone quick-locking protection according to claim 1, characterized in that, The moving mechanism (2) includes a sliding frame (22), which is fixedly connected inside the housing (1). A terminal base (21) is slidably connected to the inner side of the sliding frame (22). Two first tension springs (23) are fixedly connected to the rear side of the terminal base (21). First rotating columns (25) are rotatably connected to both sides of the terminal base (21). A connecting rod (26) is fixedly connected to the top of the first rotating column (25). A second rotating column (212) is fixedly connected to the top of the connecting rod (26). A baffle (216) is rotatably connected to the front side of the sliding frame (212). Two irregular blocks (27) are fixedly connected to the bottom of the baffle (216). A square groove block (24) is fixedly connected to the bottom of the sliding frame (22). Multiple first springs (28) are fixedly connected to the inner side of the square groove block (24). A railing (29) is fixedly connected to the other end of the multiple first springs (28). Multiple third springs (215) are slidably connected to the inner side of the square groove block (24). Two T-shaped rods (214) are fixedly connected to the front side of the terminal base (21).

3. The anti-theft electricity meter box with multi-zone quick-locking protection according to claim 1, characterized in that, The locking mechanism (3) includes a first guide sleeve (31), which is fixedly connected to the inner side of the housing (1). A second guide sleeve (32) is fixedly connected to the rear side of the first guide sleeve (31). A pin (36) is slidably connected to the inner side of the second guide sleeve (32). An energy storage spring (38) is fixedly connected to the rear end of the pin (36). The other end of the energy storage spring (38) is fixedly connected to the rear side of the housing (1). Two engaging grooves (37) are provided on the outer side of the pin (36). The first guide sleeve (31) Two locking blocks (35) are slidably connected on the inner side. A connecting plate (39) is fixedly connected to one side of each of the two locking blocks (35). Two telescopic rods (311) are fixedly connected to one side of each of the two connecting plates (39). A rotating round rod (313) is rotatably connected to one side of each of the two connecting plates (39). A bent rod (312) is fixedly connected to the rear side of each of the two rotating round rods (313). A connecting thin rod (310) is fixedly connected to the middle of the bent rod (312). The other end of the connecting thin rod (310) is fixedly connected to the inner wall of the housing (1).

4. The anti-theft electricity meter box with multi-zone quick-locking protection according to claim 1, characterized in that, A display screen (4) is fixedly connected to the front side of the housing (1), and a plurality of buttons (6) are provided at the bottom of the display screen (4). The buttons (6) are fixedly connected to the front side of the housing (1).

5. The anti-theft electricity meter box with multi-zone quick-locking protection according to claim 1, characterized in that, The top of the housing (1) is provided with multiple insertion holes (5) at equal intervals, and the outer side of the housing (1) is provided with two connection holes (8).

6. The anti-theft electricity meter box with multi-zone quick-locking protection according to claim 2, characterized in that, The electronic component (7) has two mounting plates (210) fixedly connected to its rear side, and two clamping plates (211) slidably connected to the rear side of the mounting plates (210). A second spring (213) is fixedly connected between the two clamping plates (211).

7. The anti-theft electricity meter box with multi-zone quick-locking protection according to claim 3, characterized in that, The inner side of the first guide sleeve (31) is slidably connected with a plurality of locking rings (33), and a fourth spring (34) is fixedly connected to the opposite side of each of the plurality of locking rings (33).

8. The anti-theft electricity meter box with multi-zone quick-locking protection according to claim 7, characterized in that, The engaging ring (33) engages in the middle of the engaging groove (37), and the engaging block (35) engages in the outer side of the pin (36).

9. A multi-zone quick-locking and protective anti-theft electricity meter box according to claim 6, characterized in that, The railing (29) is slidably connected to the inside of the square groove block (24) and to the outside of the third spring (215).

10. A multi-zone fast-locking and protective anti-theft electricity meter box according to claim 6, characterized in that, The railing (29) is slidably connected to the outside of the irregular block (27), and the T-shaped rod (214) is engaged between the two clamping plates (211).

Images