A smart lock for electric energy metering based on software encryption and its monitoring method

Abstract

The present invention discloses a software-encrypted smart lock for electric energy metering and a monitoring method thereof. The smart lock for electric energy metering includes: a processing and calculation circuit for processing data signals received by various ports and sensors, controlling the operation of the locking device, and calculating and generating data signals to be sent to external devices; a communication interaction port, which is a wired port for receiving status signals from external sensor devices; a status input port, which is a wired port for receiving status signals from external sensor devices; a power input port, which is a port for receiving external DC power supply; a locking device, which is an electrically driven device that executes unlocking control instructions and the driven locking structure; a lock state sensor, which is a sensor for monitoring whether the locking structure is in the unlocked or locked state; and a door sensor, which is a sensor for monitoring the open and closed state of the meter box or cabinet door.

Description

Technical Field

[0001] The present invention relates to the technical field of smart locks for electric energy metering, and more specifically, to a smart lock for electric energy metering based on software encryption and a monitoring method thereof, which is used to lock electric energy metering boxes / cabinets, etc. and has a status signal access function. Background Art

[0002] At present, the locks commonly used for electricity metering on site are mainly traditional mechanical locks. The key management mode is usually one lock and one key, or multiple locks share one key. Since each manager is responsible for a large number of metering boxes / cabinets, the number of physical keys is large and difficult to manage. The security risk is high when the keys are lost. Therefore, mechanical locks have obvious limitations in terms of security and management difficulty.

[0003] To address the problems and shortcomings of traditional mechanical locks, the field of electricity metering has developed specialized smart locks. These use dedicated terminal devices to establish wireless communication connections with the locks, enabling keyless operation. Built-in hardware security modules enable secure, encrypted interaction with the terminal devices to ensure data security. However, after long-term practical application, these smart locks still have problems: First, they are expensive. Since the hardware security modules require customized development and production, the overall cost of smart locks increases. Second, the locks cannot monitor the opening and closing, vibration, and other states of the electricity metering box / cabinet's doors, making it impossible to promptly detect false door locks or external force damage. Third, the opening and locking control methods are complex, and the excessive number of process steps results in low usability and efficiency.

[0004] Therefore, this paper studies and designs an intelligent lock for an electric energy meter box and a monitoring method thereof to solve the above problems. Summary of the Invention

[0005] In response to the problems of high cost, inability to monitor the status of electricity metering boxes / cabinets, low usability and efficiency of smart locks in the existing technology in the field of electricity metering, the present invention provides a smart lock for electricity metering based on software encryption and a monitoring method thereof.

[0006] According to one aspect of the present invention, there is provided a smart lock for electric energy metering based on software encryption, comprising:

[0007] Processing and calculation circuit, communication interaction port, state quantity input port, power input port, locking device, locking state sensor, door sensor; wherein

[0008] The processing and calculation circuit is used to process the data signals received from the communication interaction port, the state input port, the power input port, the lock state sensor and the door sensor, control the action of the locking device, and calculate and generate data signals to be sent to the external device;

[0009] The communication interaction port is a data transceiver port for communicating with the terminal equipment used by on-site operators, the internal equipment of the meter box or cabinet, and the background master station system;

[0010] The state quantity input port is a wired port for receiving the state signal of the external sensor device;

[0011] The power input port is the port for connecting to an external DC power supply;

[0012] The locking device is an electric drive device that executes the unlocking control command and the driven locking structural component;

[0013] The locking state sensor is a sensor that monitors whether the locking structure component is in an unlocked or locked state;

[0014] The door sensor is a sensor that monitors the open and closed status of the meter box or cabinet door.

[0015] Preferably, the processing and computing circuit is a circuit board composed of a processing chip, resistors, capacitors, and diodes.

[0016] Preferably, the communication interaction ports include: serial port, CAN interface, USB interface, Bluetooth, NFC interface, Lora interface, GPRS interface, 3G interface, 4G interface and 5G interface.

[0017] Preferably, the state quantity input port includes two wiring contacts for external mechanical contact switches, spring vibration switches, reed switches, Hall sensors and light sensors. The state quantity input port is arranged on the surface of the lock housing for connecting external sensors during installation and use.

[0018] Preferably, the electric drive device includes a motor, a solenoid valve and an energized contractible metal wire.

[0019] Preferably, the locking structural components include a lock tongue, a lock bolt, a lock hook, a lock ring and a lock buckle.

[0020] According to another aspect of the present invention, a method for monitoring a smart lock for electric energy metering based on software encryption is provided, comprising:

[0021] The lock state sensor receives a signal, the state quantity input port receives a signal, and the door sensor receives a signal;

[0022] The processing and operation circuit analyzes and encodes the states of the signals received by the lock state sensor, the state quantity input port, and the door sensor to obtain a state code;

[0023] Determine whether the smart lock for electric energy metering based on software encryption is in an abnormal state according to the state code;

[0024] If the software-encrypted smart lock for electric energy metering is in an abnormal state, the state code is broadcast in plain text through the communication interaction port; otherwise, the monitoring of the software-encrypted smart lock for electric energy metering is terminated;

[0025] After broadcasting the status code in plain text through the communication interaction port, the number of broadcasts is accumulated, and it is determined whether the number of broadcasts reaches a preset limit;

[0026] If the number of broadcasts reaches a preset limit, the monitoring of the smart lock for electric energy metering based on software encryption is terminated; otherwise, it is determined whether the external device responds;

[0027] If the external device responds, the monitoring of the smart lock for electric energy metering based on software encryption is terminated; otherwise, it is re-determined whether the smart lock for electric energy metering based on software encryption is in an abnormal state.

[0028] The present invention can achieve the three effects of reducing costs, realizing status monitoring of energy metering boxes / cabinets, and improving ease of use and efficiency on the basis of existing smart locks in the field of electricity metering, thereby improving the practicality of smart lock products for energy metering and the applicability of new application scenarios. Specifically, in terms of reducing costs, a software encryption algorithm is used instead of a hardware security module, which saves the material cost of the hardware security module while maintaining the existing data security level; in terms of status monitoring of energy metering boxes / cabinets, it has state quantity input ports for door sensors and various sensors such as vibration, temperature and humidity exceeding the limit, and smoke exceeding the limit, and sends the status information to the lower-level equipment or the main station system according to the status monitoring method, thereby realizing status monitoring; in terms of improving ease of use and efficiency, compared with existing solutions, the process of opening and closing locks is simplified to the greatest extent, reducing the steps of manual operation by personnel and software automation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0030] Figure 1 1 is a schematic diagram of the composition of a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention;

[0031] Figure 2 1 is a flowchart of an unlocking control method of a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention;

[0032] Figure 3 1 is a flowchart of a locking control method of a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention;

[0033] Figure 41 is a flow chart of a monitoring and control method of a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of the time for generating various signals provided by an exemplary embodiment of the present invention;

[0035] Figure 6 1 is a schematic diagram of the external structure of an example of a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention;

[0036] Figure 7 It is a schematic diagram of the internal structure of an example of a smart lock for electricity metering based on software encryption provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0037] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0038] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0039] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of the present invention are only used to distinguish different steps, devices or modules, and neither represent any specific technical meaning nor indicate the necessary logical order between them.

[0040] It should also be understood that, in the embodiments of the present invention, “a plurality of” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0041] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0042] In addition, the term "and / or" in this invention merely describes an association relationship between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this invention generally indicates that the related objects are in an "or" relationship.

[0043] It should also be understood that the description of the various embodiments of the present invention focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced with each other. For the sake of brevity, they will not be described one by one.

[0044] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0045] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0046] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0047] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0048] Embodiments of the present invention can be applied to electronic devices such as terminal devices, computer systems, and servers, and can operate in conjunction with numerous other general-purpose or specialized computing system environments or configurations. Examples of well-known terminal devices, computing systems, environments, and / or configurations suitable for use with terminal devices, computer systems, servers, and other electronic devices include, but are not limited to, personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, minicomputer systems, mainframe computer systems, and distributed cloud computing technology environments including any of the above.

[0049] Electronic devices such as terminal devices, computer systems, and servers can be described in the general context of computer system-executable instructions (such as program modules) executed by a computer system. Generally, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in a distributed cloud computing environment, where tasks are performed by remote processing devices linked via a communication network. In a distributed cloud computing environment, program modules can be located on local or remote computing system storage media, including storage devices.

[0050] Exemplary devices

[0051] Figure 1 FIG is a schematic diagram of a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention. Figure 1As shown, the smart lock for electricity metering based on software encryption includes: a processing and operation circuit, a communication interaction port, a state quantity input port, a power input port, a locking device, a locking state sensor, and a door sensor; wherein the processing and operation circuit is used to process the data signals received by the communication interaction port, the state quantity input port, the power input port, the locking state sensor and the door sensor, control the action of the locking device, and calculate and generate data signals sent to external devices; the communication interaction port is a data transceiver port for communicating and interacting with the terminal equipment used by on-site workers, the internal equipment of the meter box or cabinet, and the background master station system; the state quantity input port is a wired port for accessing the state signal of the external sensor device; the power input port is a port for accessing the external DC power supply; the locking device is an electric drive device that executes the unlocking control instruction and the driven locking structure component; the locking state sensor is a sensor for monitoring whether the locking structure component is in the unlocked or locked state; the door sensor is a sensor for monitoring the opening and closing state of the meter box or cabinet door.

[0052] Preferably, the processing and computing circuit is a circuit board composed of a processing chip, resistors, capacitors, and diodes.

[0053] Preferably, the communication interaction ports include: serial port, CAN interface, USB interface, Bluetooth, NFC interface, Lora interface, GPRS interface, 3G interface, 4G interface and 5G interface.

[0054] Preferably, the state quantity input port includes two wiring contacts for external mechanical contact switches, spring vibration switches, reed switches, Hall sensors and light sensors. The state quantity input port is arranged on the surface of the lock housing for connecting external sensors during installation and use.

[0055] Preferably, the electric drive device includes a motor, a solenoid valve and an energized contractible metal wire.

[0056] Preferably, the locking structural components include a lock tongue, a lock bolt, a lock hook, a lock ring and a lock buckle.

[0057] In the embodiment of the present invention, see Figure 1 As shown in the figure, the smart lock for energy metering based on software encryption includes a processing and calculation circuit, a communication interaction port, a status input port, a power input port, a locking device, a lock status sensor, and a door sensor. The details of each structure are as follows:

[0058] 1) Processing and calculation circuit: This circuit processes the data signals received from various ports and sensors, controls the operation of the locking device, and generates data signals for transmission to external devices. Specifically, it consists of a circuit board composed of processing chips, resistors, capacitors, diodes, and other circuit components.

[0059] 2) Communication and interaction ports: Data transceiver ports for communication with terminal devices (such as handheld devices) used by on-site workers, devices inside meter boxes / cabinets, and backend master systems. These ports may include wired interfaces such as serial ports, CAN, and USB, as well as wireless interfaces such as Bluetooth, NFC, LoRa, GPRS, 3G, 4G, and 5G.

[0060] 3) Status Input Port: This port receives status signals from external sensors and includes two wiring contacts. This port can be connected to mechanical contact switches, spring vibration switches, reed switches, Hall effect sensors, light sensors, and more. Multiple such ports can be configured. This port is located on the lock housing and is used to connect external sensors during installation.

[0061] 4) Power input port: port for connecting to external DC power supply.

[0062] 5) Locking device: The electrically driven device that executes the unlocking control command and the driven locking components. The electrically driven device includes the motor, solenoid valve, energized retractable wire, etc. The locking components include the lock tongue, bolt, lock hook, lock ring, lock buckle, etc.

[0063] 6) Locking state sensor: A sensor that monitors whether the locking structure is in the unlocked / locked state. It may include a mechanical travel switch, a Hall sensor, etc.

[0064] 7) Door sensor: This sensor monitors the open / closed status of the meter box / cabinet door. This sensor may include a mechanical travel switch, Hall effect sensor, or other device. Multiple sensors of this type may be installed. This sensor is integrated into the lock body and connected to the internal circuit board during manufacturing.

[0065] Therefore, the smart lock for electricity metering based on software encryption proposed by the present invention can achieve the three effects of reducing costs, realizing status monitoring of electricity metering boxes / cabinets, and improving ease of use and efficiency on the basis of existing smart locks in the field of electricity metering, thereby improving the practicality of smart locks for electricity metering and the applicability of new application scenarios. Specifically, in terms of reducing costs, a software encryption algorithm is used instead of a hardware security module, which saves the material cost of the hardware security module while maintaining the existing data security level; in terms of status monitoring of electricity metering boxes / cabinets, it has state quantity input ports for door sensors and various sensors such as vibration, temperature and humidity exceeding the limit, and smoke exceeding the limit, and sends the status information to the lower-level equipment or the main station system according to the status monitoring method, thereby realizing status monitoring; in terms of improving ease of use and efficiency, compared with existing solutions, the process of opening and closing locks is simplified to the greatest extent, reducing the steps of manual operation by personnel and software automation operation.

[0066] Exemplary Methods

[0067] Figure 2 This is a flow chart of an unlocking control method of a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention. Figure 2 As shown, the method includes:

[0068] The communication interaction port receives the unlocking control instruction ciphertext;

[0069] The processing and operation circuit calls the encryption algorithm to decrypt the instruction;

[0070] Determine whether the decryption authentication is passed;

[0071] If the decryption authentication is passed, the locking device action is unlocked; otherwise, the process ends.

[0072] In the embodiment of the present invention, the data protocol of the unlocking control instruction is set by the user. Compared with the existing solution, after the locking device is actuated, there is no need to feedback whether the unlocking is successful, and the unlocking process ends immediately, saving processing and computing circuit resources.

[0073] Figure 3 FIG is a flow chart of a locking control method of a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention. Figure 3 As shown, the method includes:

[0074] start;

[0075] Manually close the locking device;

[0076] Finish.

[0077] In the embodiment of the present invention, the locking control method does not require external issuance of locking control instructions, making it more convenient for on-site personnel to operate.

[0078] Figure 4 FIG is a flow chart of a monitoring method for a smart lock for electric energy metering based on software encryption provided by an exemplary embodiment of the present invention. Figure 4 As shown, the method includes:

[0079] The lock state sensor receives a signal, the state quantity input port receives a signal, and the door sensor receives a signal;

[0080] The processing and operation circuit analyzes and encodes the states of the signals received by the lock state sensor, the state quantity input port, and the door sensor to obtain a state code;

[0081] Determine whether the smart lock for electric energy metering based on software encryption is in an abnormal state according to the state code;

[0082] If the software-encrypted smart lock for electric energy metering is in an abnormal state, the state code is broadcast in plain text through the communication interaction port; otherwise, the monitoring of the software-encrypted smart lock for electric energy metering is terminated;

[0083] After broadcasting the status code in plain text through the communication interaction port, the number of broadcasts is accumulated, and it is determined whether the number of broadcasts reaches a preset limit;

[0084] If the number of broadcasts reaches a preset limit, the monitoring of the smart lock for electric energy metering based on software encryption is terminated; otherwise, it is determined whether the external device responds;

[0085] If the external device responds, the monitoring of the smart lock for electric energy metering based on software encryption is terminated; otherwise, it is re-determined whether the smart lock for electric energy metering based on software encryption is in an abnormal state.

[0086] In the embodiment of the present invention, the cumulative broadcast times limit N is determined by the user.

[0087] The input signals of smart locks for energy metering include three types: lock status A, input status B, and door status C. Lock status signal A is generated when the lock is unlocked, input status signal B is generated when the external sensor is activated, and door status signal C is generated when the door is opened. The time when a certain type of signal occurs is defined as t X , define the starting interval time of any two types of signals as t (X-Y) , then the various time examples of generating signal A first and then generating signal B are shown in Figure 5 .

[0088] When any input signal is generated, the processing and operation circuit is triggered to enter the abnormal state judgment cycle. If no new input signal is generated within 3600 seconds (1 hour) after any input signal is generated, the abnormal state judgment cycle ends.

[0089] There are four types of abnormal status: unlocked, illegal opening, internal failure, and external damage. The methods for judging each abnormal status are as follows:

[0090] 1) Unlocked

[0091] Within one abnormal state judgment cycle, t C >n seconds, where n is set by the user;

[0092] 2) Illegal opening of boxes

[0093] Within one abnormal state judgment cycle, t A = 0 and t C >5 seconds, or meet t (A-C) >t A ;

[0094] 3) Internal fault

[0095] Within one abnormal state judgment cycle, t A = 0 and t C = 0 and t B >0, or satisfies t (A-C) <t A And t (C-B) >t C ;

[0096] 4) External damage

[0097] Within one abnormal state judgment cycle, t B >0 and t (B-C) >0.

[0098] The following will be combined Figure 6 and Figure 7 , describes the external structure and external structure of the smart lock example for electricity metering based on software encryption:

[0099] exist Figure 6 and Figure 7 Among them, 1 is a circuit board, which realizes the functions of processing and operation circuit; 2 is a two-in-one interface of serial communication and temporary power supply, which realizes the functions of communication interaction port and power input port; 3 is a three-in-one interface of CAN communication, state quantity input and long-term power supply, which realizes the functions of communication interaction port, state quantity input port and power input port; 4 is a motor, 5 is a reduction gear set, 6 is a transmission device, 7 is a main lock tongue, which together realize the function of locking device; 8 is a lock tongue state sensor, which realizes the function of locking state sensor; 9 is an auxiliary lock tongue, which is in a pop-up state when the lock is open and is pressed into the body by the door frame after the lock is closed, realizing the function of door sensor.

[0100] The unlocking control method is as follows:

[0101] The dedicated external power supply device is connected through the serial communication and temporary power supply two-in-one interface 2 to power the lock and receive the unlocking control command ciphertext.

[0102] The encryption algorithm decryption instruction is called through circuit board 1, and the decrypted data is authenticated.

[0103] The control motor 4 runs, and after deceleration through the reduction gear set 5, it drives the transmission device 6, and finally drives the main lock tongue 7 to move, pull out from the lock hole of the door frame and retract into the lock body to complete the unlocking. After a certain period of time, the motor reverses and drives the main lock tongue 7 to reset, preparing for locking.

[0104] The locking control method is as follows:

[0105] When a person manually closes the door, the main lock tongue 7 is squeezed back and the spring inside the main lock tongue 7 is compressed. After the main lock tongue 7 is aligned with the lock hole of the door frame, the spring inside the main lock tongue 7 is released and the lock tongue bounces into the lock hole to complete the locking.

[0106] The condition monitoring method is as follows:

[0107] The circuit board 1 parses the status input port signal of the three-in-one interface 3, the locking status sensor signal of the lock tongue status sensor 8, and the door sensor signal of the auxiliary lock tongue 9, and encodes them according to the status coding protocol. If the circuit board 1 determines that there is an abnormality, the status code is broadcast in plain text through the three-in-one interface 3. If the circuit board 1 determines that the cumulative broadcast time limit is reached or a response is received from the external device, the broadcast is ended.

[0108] Therefore, the monitoring method of smart locks for electricity metering based on software encryption proposed in the present invention can achieve the three effects of reducing costs, realizing status monitoring of electricity metering boxes / cabinets, and improving ease of use and efficiency on the basis of existing smart locks in the field of electricity metering, thereby improving the practicality of smart locks for electricity metering and the applicability of new application scenarios. Specifically, in terms of reducing costs, a software encryption algorithm is used instead of a hardware security module, which saves the material cost of the hardware security module while maintaining the existing data security level; in terms of status monitoring of the electricity metering box / cabinet, it has state quantity input ports for door sensors and various sensors such as vibration, temperature and humidity exceeding the limit, and smoke exceeding the limit, and sends the status information to the lower-level equipment or the main station system according to the status monitoring method, thereby realizing status monitoring; in terms of improving ease of use and efficiency, compared with the existing solutions, the process of opening and closing the lock is simplified to the greatest extent, reducing the steps of manual operation by personnel and software automation operation.

[0109] The basic principles of the present invention have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in the present invention are merely illustrative and non-limiting, and should not be construed as necessarily possessed by each embodiment of the present invention. Furthermore, the specific details disclosed above are provided for illustrative purposes and to facilitate understanding, and are not intended to be limiting. These details do not necessarily limit the present invention to being implemented using these specific details.

[0110] Each embodiment in this specification is described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. References to the same or similar parts between the various embodiments are sufficient. For system embodiments, since they largely correspond to method embodiments, their description is relatively simple. For relevant parts, references to the description of the method embodiments are sufficient.

[0111] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A smart lock for electric energy metering based on software encryption, characterized in that: include: Processing and calculation circuit, communication interaction port, status input port, power input port, locking device, locking status sensor, door sensor; in The processing and calculation circuit is used to process the data signals received from the communication interaction port, the state input port, the power input port, the lock state sensor and the door sensor, control the action of the locking device, and calculate and generate data signals to be sent to the external device; The communication interaction port is a data transceiver port for communicating with the terminal equipment used by on-site operators, the internal equipment of the meter box or cabinet, and the background master station system; The state quantity input port is a wired port for receiving the state signal of the external sensor device; The power input port is the port for connecting to an external DC power supply; The locking device is an electric drive device that executes the unlocking control command and the driven locking structural component; The locking state sensor is a sensor that monitors whether the locking structure component is in an unlocked or locked state; The door sensor is a sensor that monitors the opening and closing status of the meter box or cabinet door; Among them, the input signals of the smart lock for energy metering include three categories: lock state A, input state B, and door state C. Among them, the lock state signal A is generated when the lock is unlocked, the input state signal B is generated when the external sensor is activated, and the door state signal C is generated when the door is opened. The duration of a certain type of signal is defined as t X , define the starting interval time of any two types of signals as t (X-Y) ; Among them, when any input signal is generated, the processing and operation circuit is triggered to enter the abnormal state judgment cycle. If no new input signal is generated within 3600 seconds after any input signal is generated, the abnormal state judgment cycle ends; There are four types of abnormal status: unlocked, illegal opening, internal failure, and external damage. The methods for judging each abnormal status are as follows: 1) Unlocked: Within one abnormal state judgment cycle, t C >n seconds, where n is set by the user; 2) Illegal opening of the box: Within one abnormal state judgment cycle, t A = 0 and t C >5 seconds, or meet t (A-C) >t A ; 3) Internal fault: Within one abnormal state judgment cycle, t A = 0 and t C = 0 and t B >0, or satisfies t (A-C) <t A And t (C-B) >t C ; 4) External damage: Within one abnormal state judgment cycle, t B >0 and t (B-C) >0.

2. The smart lock for electric energy metering based on software encryption according to claim 1 is characterized in that: The processing and calculation circuit is a circuit board composed of a processing chip, resistors, capacitors, and diodes.

3. The smart lock for electric energy metering based on software encryption according to claim 1 is characterized in that: Communication interaction ports include: serial port, CAN interface, USB interface, Bluetooth, NFC interface, Lora interface, GPRS interface, 3G interface, 4G interface and 5G interface.

4. The smart lock for electric energy metering based on software encryption according to claim 1, characterized in that: The state quantity input port includes two wiring contacts for external mechanical contact switches, spring vibration switches, reed switches, Hall sensors and light sensors. The state quantity input port is set on the surface of the lock housing for connecting external sensors during installation.

5. The smart lock for electric energy metering based on software encryption according to claim 1 is characterized in that: The electric drive device includes a motor, a solenoid valve and an energized shrinking metal wire.

6. The smart lock for electric energy metering based on software encryption according to claim 1, characterized in that: The locking structure components include a lock tongue, a lock bolt, a lock hook, a lock ring and a lock buckle.

7. A monitoring method for smart locks for electric energy metering based on software encryption, characterized in that: include: The lock state sensor receives a signal, the state quantity input port receives a signal, and the door sensor receives a signal; The processing and operation circuit analyzes and encodes the states of the signals received by the lock state sensor, the state quantity input port, and the door sensor to obtain a state code; Determine whether the smart lock for electric energy metering based on software encryption is in an abnormal state according to the state code; If the smart lock for electric energy metering based on software encryption is in an abnormal state, the state code is broadcast in plain text through the communication interaction port; Otherwise, the monitoring of the smart lock for electric energy metering based on software encryption is terminated; After broadcasting the status code in plain text through the communication interaction port, the number of broadcasts is accumulated, and it is determined whether the number of broadcasts reaches a preset limit; If the number of broadcasts reaches a preset limit, the monitoring of the smart lock for electric energy metering based on software encryption is terminated; Otherwise, it determines whether the external device responds; If the external device responds, the monitoring of the smart lock for electric energy metering based on software encryption is terminated; Otherwise, it is re-judged whether the smart lock for electric energy metering based on software encryption is in an abnormal state; Among them, the input signals of the smart lock for energy metering include three categories: lock state A, input state B, and door state C. Among them, the lock state signal A is generated when the lock is unlocked, the input state signal B is generated when the external sensor is activated, and the door state signal C is generated when the door is opened. The duration of a certain type of signal is defined as t X , define the starting interval time of any two types of signals as t (X-Y) ; Among them, when any input signal is generated, the processing and operation circuit is triggered to enter the abnormal state judgment cycle. If no new input signal is generated within 3600 seconds after any input signal is generated, the abnormal state judgment cycle ends; There are four types of abnormal status: unlocked, illegal opening, internal failure, and external damage. The methods for judging each abnormal status are as follows: 1) Unlocked: Within one abnormal state judgment cycle, t C >n seconds, where n is set by the user; 2) Illegal opening of the box: Within one abnormal state judgment cycle, t A = 0 and t C >5 seconds, or meet t (A-C) >t A ; 3) Internal fault: Within one abnormal state judgment cycle, t A = 0 and t C = 0 and t B >0, or satisfies t (A-C) <t A And t (C-B) >t C ; 4) External damage: Within one abnormal state judgment cycle, t B >0 and t (B-C) >0.

Images