CN112019570A - Prepayment management system and edge computing communication terminal - Google Patents
Prepayment management system and edge computing communication terminal Download PDFInfo
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- H—ELECTRICITY
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Abstract
The invention provides a prepayment management system and an edge computing communication terminal, wherein the edge computing communication terminal is arranged between an ammeter and a cloud background server, a virtual ammeter data computing and storing module with unique serial numbers is established for each accessed ammeter by the edge computing communication terminal to replace a cloud background server to read and calculate the ammeter, so that the common ammeter without prepayment function can realize prepayment function, the calculation of the ammeter fee and the prepayment balance can be completed more quickly, the electricity control can be carried out more quickly and timely, important data and commands such as electricity price information, recharging data and electricity control instructions are ensured to be encrypted by an algorithm and safely communicated through a wide area network, the problem that the traditional background prepayment system needs server and network communication expansion due to the increase of the number of the ammeters is solved, the access amount of the ammeter is enlarged, and the prepayment function of an ammeter user is not affected by the fault of the cloud background server and the communication network fault, the system has high reliability and safe data communication.
Description
Technical Field
The invention relates to the technical field of power supply charging management, in particular to a prepayment management system and an edge computing communication terminal.
Background
The prepaid model of electricity charging has gained increasing popularity and usage. The prepayment mode generally needs to use a special prepayment ammeter, a customer firstly recharges the ammeter, the ammeter automatically charges and deducts the pre-stored amount of electricity fee according to the electricity utilization condition, and the ammeter automatically switches off and cuts off power when the pre-stored amount of electricity fee is less than zero. However, many existing installed common smart meters do not have a prepayment function, and if a prepayment charging mode is to be popularized, all the smart meters need to be replaced by the smart meters with the prepayment function, so that the meter replacement scale and the cost are too large, and the large-scale implementation is difficult.
Therefore, another method for realizing a prepayment mode is provided, namely, remote meter reading and charging are carried out by a server background, prepayment calculation is carried out on a cloud server, and once the balance of the electric charge of the electric meter is found to be insufficient, the cloud server directly sends a power failure control command to the corresponding electric meter to carry out power failure control on a user. However, this method has the following problems:
1. the cloud background server can complete the calculation of the electric charge only by remotely reading the electric meter data through the wide area network, once the network communication is in problem, the background server cannot read and receive the electric meter data on time, the server cannot calculate the electric charge, certainly, the calculation of the prepaid balance cannot be performed, and the control of the arrearage power failure cannot be completed;
2. the cloud background server needs to finish the reading of a large number of electric meters, and a long time needs to be consumed for each reading; the more the number of the electric meters is, the longer the meter reading period is, the more time is required for calculating the electric charge, and the longer the interval time for charging the electric charge is. In the long-time interval of meter reading and charging, the electricity charge changes greatly for users with large electricity consumption, the prepayment calculation is likely to have more arrearages but can not be powered off in time, and the users are informed of recharging in time, so that the prepayment function is invalid;
3. because the cloud background server needs to continuously and repeatedly complete the meter reading, charging and prepayment balance calculation of a large number of electric meters, the calculation amount is huge, so that the requirements on resources such as a CPU (central processing unit)/a memory and the like of the cloud background server are high, and the investment cost and the maintenance cost of the cloud background server are increased;
4. when the transmission of the wide area network fails or the cloud background server fails, meter reading cannot be realized, all the electric meters cannot be charged, the prepayment function is directly disabled, the situations that the power is not interrupted due to defaulting and the recharging cannot be carried out exist, and the loss to a power supply unit and a power consumer is caused (namely, the reliability of the cloud remote communication directly influences the realization of the prepayment function of the electric meters).
5. For the intelligent electric meter without the data encryption function, when the cloud background server directly sends an electric control command to the electric meter through the wide area network, the intelligent electric meter is very easy to be interfered by the outside and even maliciously tampered, and cannot be safely used on the Internet.
Therefore, the patent application with the application publication number of CN110660165A discloses an extensible modular electricity selling system and a using method thereof, wherein the electricity selling system mainly comprises an intelligent electricity meter and a background electricity selling system, the electricity selling system comprises two modes of electricity selling through a charging card and remote electricity selling, the electricity selling system and an electricity meter are connected through a network encryption machine, the electricity meter downloads a private key, and a user can safely complete electricity utilization prepayment operation through two modes of the charging card or a cloud APP. The electricity selling system is essentially still a traditional architecture mode of an intelligent electric meter with an encryption function and a cloud background server, an electric energy meter matched with a remote electricity selling system or a charging card is needed, and if the electricity selling system is popularized, the electric energy meter needs to be replaced on a large scale, so that the cost is too high.
Disclosure of Invention
In order to solve at least one technical problem in the prior art, an object of the embodiments of the present application is to provide a prepaid management electric system and an edge computing communication terminal, which can implement prepaid charging management based on a common smart electric meter, and avoid the problems that a meter reading period is long, requirements on computing power and storage capacity of a server are high, and the system cannot be suitable for simultaneous use of large-batch electric meters due to remote meter reading and charging performed by a cloud background server.
In a first aspect, an embodiment of the present application provides an edge computing communication terminal, including main control chip MCU and with main control chip MCU electric connection's down communication circuit module, upward communication circuit module, data memory and high accuracy clock, the down communication circuit module is used for being connected with the ammeter communication, the communication circuit module that goes upward is used for being connected with high in the clouds backend server communication, main control chip MCU is used for:
collecting the current row degree of each accessed electric meter;
acquiring current ammeter data information corresponding to the ammeter, wherein the ammeter data information comprises real-time row degree and electricity price data;
calculating the electric charge according to the current row degree of the electric meter and the current electric meter data information;
and updating the current electric meter data information of the electric meter according to the electric charge calculation result and the current row degree, and sending the updated current electric meter data information of the electric meter to a cloud background server.
In the edge computing communication terminal, the main control chip MCU is further configured to:
establishing a virtual electric meter data storage module for each accessed electric meter in the data storage, allocating a number for the virtual electric meter data storage module, wherein the number is the same as the unique identification number of the corresponding electric meter, and inputting the personal information of the electricity customer of the electric meter and the electric meter data information into the corresponding virtual electric meter data storage module;
and when updating the current electric meter data information of the electric meter according to the electric charge calculation result and the current popularity, storing the latest electric meter data information in the corresponding virtual electric meter data storage module.
In the edge computing communication terminal, the main control chip MCU performs the following steps according to a first preset frequency: the method comprises the steps of obtaining the current row degree of the ammeter, obtaining current ammeter data information corresponding to the ammeter, calculating the electric charge according to the current row degree of the ammeter and the current ammeter data information, and updating the current ammeter data information of the ammeter according to the electric charge calculation result and the current row degree; sending the updated current ammeter data information of the ammeter to a cloud background server according to a second preset frequency; the first preset frequency is higher than the second preset frequency.
In the edge computing communication terminal, the ammeter data information also comprises a prepaid balance;
and the main control chip MCU is also used for deducting the electric charge obtained by calculation from the prepaid balance of the ammeter.
In the edge computing communication terminal, the main control chip MCU is also used for executing power-off control on the ammeter when the prepaid balance of the ammeter is insufficient.
Further, the data information of the electric meter also comprises a charging mode and a credit balance; the charging mode is a common mode, a credit mode or a power-saving mode;
and the MCU executes power-off control on the electric meter according to the charging mode and the credit balance.
In the edge computing communication terminal, the main control chip MCU is further used for receiving encrypted ammeter data information issued by the cloud background server so as to update the current ammeter data information of the ammeter.
In the edge computing communication terminal, the main control chip MCU is further used for executing recharging operation, power-off operation or power-on operation on the corresponding ammeter according to the encryption control instruction sent by the cloud background server.
Further, the main control chip MCU is further configured to receive a random number one, a ciphertext one, a dispersion factor and an identity authentication instruction sent by the cloud backend server when receiving an encryption control instruction sent by the cloud backend server, where the ciphertext one is obtained by the cloud backend server encrypting the random number one according to a data encryption protocol;
encrypting the random number I according to a data encryption protocol to obtain a ciphertext II, and comparing the ciphertext II with the ciphertext I to judge whether the ciphertext II and the ciphertext I are equal; if not, the authentication fails; if the authentication is equal, successfully authenticating, taking a random number II consisting of a random number of four bytes and an encrypted serial number of eight bytes, and sending the random number II to the cloud background server;
receiving encrypted control information sent back by the cloud background server, wherein the encrypted control information is obtained by the cloud background server through ciphertext calculation according to the random number II, the dispersion factor, the encrypted serial number, the control information and the timestamp;
and carrying out decryption processing on the encrypted control information to obtain information such as decrypted control information, electricity price and the like.
In a second aspect, an embodiment of the present application provides a prepaid management system, including a plurality of electric meters and a cloud backend server, and further including an edge computing communication terminal, where the edge computing communication terminal is in communication connection with the plurality of electric meters and the cloud backend server;
the edge computing communication terminal has computing and storage capabilities and is used for:
collecting the current row degree of each accessed electric meter;
acquiring current electric meter data information corresponding to the electric meter, wherein the electric meter data information comprises the prior degree and the electricity price data;
calculating the electric charge according to the current row degree of the electric meter and the current electric meter data information;
and updating the current electric meter data information of the electric meter according to the electric charge calculation result and the current row degree, and sending the updated current electric meter data information of the electric meter to a cloud background server.
Has the advantages that:
the utility model provides a prepayment management electric system and edge calculation communication terminal, through set up edge calculation communication terminal between ammeter and high in the clouds backend server to replace high in the clouds backend server by edge calculation communication terminal and read the ammeter degree of going to, the electric charge calculates, and sends the ammeter data message after the update for high in the clouds backend server and gather, have following advantage:
1. the prepayment charging management can be realized based on a common intelligent ammeter without the prepayment function of the ammeter, and the popularization is easy;
2. the cloud background server is not needed to read a large amount of electric meter data, the edge computing communication terminal operates independently, the accessed electric meter data can be read more quickly in frequency, prepayment balance calculation is carried out in time, the acquisition and calculation period is short, and power failure and power supply response are facilitated to be quicker;
3. the arrangement of the edge computing communication terminal greatly reduces the computing resource load of the cloud background server, so that more electric meters can be accessed, and the access capacity of the electric meter is greatly expanded;
4. the edge computing communication terminal sends the current electric meter data information of the electric meter to the cloud background server, double backup of the electric meter data information is achieved, when one party is damaged, data can be obtained from the other party to restore the data, and reliability is good.
Drawings
Fig. 1 is a schematic structural diagram of a prepaid management electrical system according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an edge computing communication terminal in a prepaid management system according to an embodiment of the present application.
Fig. 3 is an encryption communication flow chart between the cloud backend server and the edge computing communication terminal.
Fig. 4 is a flow diagram of an exemplary edge computing communication terminal performing prepaid processing.
Fig. 5 is an exemplary process flow of downlink relay processing of the edge computing communication terminal.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 2, an edge computing communication terminal 300 provided in an embodiment of the present application includes a main control chip MCU301, and a downlink communication circuit module 302, an uplink communication circuit module 303, a data storage 305, and a high-precision clock 307 electrically connected to the main control chip MCU, where the downlink communication circuit module 302 is configured to be in communication connection with an electricity meter 100, the uplink communication circuit module 303 is configured to be in communication connection with a cloud backend server 200, and the main control chip MCU is configured to:
collecting the current row degree (namely the current reading of the electric meter) of each accessed electric meter;
acquiring current electric meter data information corresponding to the electric meter, wherein the electric meter data information comprises the prior degree (namely the reading of the electric meter acquired last time) and electricity price data;
calculating the electric charge according to the current row degree of the electric meter and the current electric meter data information;
and updating the current electric meter data information of the electric meter according to the electric charge calculation result and the current row degree, and sending the updated current electric meter data information of the electric meter to the cloud background server 200.
As shown in fig. 1, when the edge computing communication terminal 300 is used, the edge computing local area network is formed by the communication connection of the uplink communication circuit module 303 and the plurality of electric meters 100, the edge computing communication terminal 300 is in communication connection with the cloud background server 200 through the uplink communication circuit module 303, and the edge computing communication terminal 300 replaces the cloud background server 200 to perform line reading and electric charge calculation on the electric meters 100, and sends updated electric meter data information to the cloud background server 200 for summarizing, so that the edge computing communication terminal has the following advantages:
1. the prepayment charging management can be realized based on a common intelligent ammeter without the prepayment function of the ammeter, and the popularization is easy;
2. the cloud background server is not needed to read a large amount of electric meter data, the edge computing communication terminal operates independently, the accessed electric meter data can be read more quickly in frequency, prepayment balance calculation is carried out in time, the acquisition and calculation period is short, and power failure and power supply response are facilitated to be quicker;
3. the arrangement of the edge computing communication terminal greatly reduces the computing resource load of the cloud background server, so that more electric meters can be accessed, and the access capacity of the electric meter is greatly expanded;
4. the edge computing communication terminal sends the current electric meter data information of the electric meter to the cloud background server, double backup of the electric meter data information is achieved, when one party is damaged, data can be obtained from the other party to restore the data, and reliability is good.
It should be noted that, when the current electric meter data information of the electric meter is updated according to the electric charge calculation result and the current popularity, the collected current popularity is used to cover the previous popularity in the current electric meter data information of the corresponding electric meter.
In some embodiments, referring to fig. 2, the downlink communication circuit module 302 includes at least one of an RS485 communication module 309 and a Lora communication module 310, and the uplink communication circuit module 303 includes at least one of a 4G communication module 311 and an ethernet communication module 312. Because most ordinary smart electric meters all have RS485 communication or Lora communication function, consequently most ordinary smart electric meters homoenergetic and edge calculation communication terminal realize the communication connection. Therefore, more used electric meters can be incorporated into the prepayment management electric system, and the prepayment function upgrading cost can be further saved.
In some embodiments, see fig. 2, the edge computing communication terminal further includes at least one of a PI switching power supply 304, a local infrared communication circuit 306, and an LED indicator light 308.
In this embodiment, the main control chip MCU is further configured to:
establishing a virtual electric meter data storage module for each accessed electric meter 100 in the data storage 305, allocating a number to the virtual electric meter data storage module, wherein the number is the same as the unique identification number (such as an electric meter asset number) of the corresponding electric meter, and recording electric meter data information into the corresponding virtual electric meter data storage module;
and when updating the current electric meter data information of the electric meter according to the electric charge calculation result and the current row degree, storing the latest electric meter data information in the corresponding virtual electric meter data storage module.
Specifically, the current electric meter data information is stored into the corresponding virtual electric meter data storage modules according to the unique identification number of the electric meter, and corresponding management operations are respectively executed according to the electric meter data information in each virtual electric meter data storage module (for example, the electricity consumption and the electricity charge of the corresponding electric meter are calculated according to the electric meter data information in the virtual electric meter data storage modules), so that mutual interference among different electric meters is avoided, each electric meter can be orderly managed, the electric meter data information uploaded to the cloud background server 200 is useful comprehensive information after comprehensive arrangement, and the cloud background server 200 can conveniently and quickly gather.
Specifically, when the edge computing communication terminal 300 calculates the electricity fee, the electricity consumption is obtained by subtracting the current running degree from the current running degree of the electricity meter 100, and then the electricity fee is calculated according to the electricity consumption and the electricity price. And if the charging strategy corresponding to the electric meter is step charging, the electric meter data information also comprises step electric quantity threshold data, the electric price is the corresponding step electric price, and charging is carried out according to the step electric quantity threshold data and the step electric price during electric charge calculation.
Generally, the main control chip MCU can directly send the updated current electric meter data information of the electric meter to the cloud backend server 200 by using plain codes (i.e. without encryption). Therefore, the cloud background server 200 does not need to decrypt the received electric meter data information, and the load of computing resources of the cloud background server 200 is small. In order to avoid malicious tampering of the uploaded data, the current electric meter data information of the electric meter can be encrypted and then sent to the cloud background server 200. Because the data is encrypted, the encrypted data is not easily subjected to external interference and malicious tampering in the data communication process with the cloud background server of the external wide area network, and the security of data transmission is greatly improved.
Specifically, the following encryption processing procedures can be adopted to perform encryption processing on the current electricity meter data (but are not limited thereto), and the encryption processing procedures include: according to a data encryption protocol, converting the electric meter data into a corresponding Token plaintext; token plaintext comprises key and data information; the first decoding operation on the key: converting the 20-bit BCD into a 66-bit binary number; circularly moving the 66-bit binary key to the right by 12 bits; finally, the following three steps are repeatedly executed for 16 times: in 66 bit binary data, the 28 th and 27 th bits are replaced by the 65 th and 64 th bits, and the 65 th and 64 th bits are removed, thereby forming a 64 bit binary data block, and the original 28 th and 27 th bits form a Token class; rearranging the 64-bit data according to the key position table to obtain a new group of 64-bit data; the set 64-bit key data is circularly shifted by 1 bit to the left. The data encryption protocol used in the encryption process may be, for example, an STS protocol, but is not limited thereto. Through the steps, the encrypted data can be obtained, and under the condition that the encryption rule and the used key location table are not known, a third party cannot crack the encrypted data, so that the security is high.
In some embodiments, the main control chip MCU performs: the method comprises the steps of obtaining the current row degree of an ammeter, obtaining current ammeter data information corresponding to the ammeter, calculating the electric charge according to the current row degree of the ammeter and the current ammeter data information, and updating the current ammeter data information of the ammeter according to the electric charge calculation result and the current row degree; sending the updated current ammeter data information of the ammeter to a cloud background server according to a second preset frequency; the first predetermined frequency is higher than the second predetermined frequency. It should be noted that, if the edge computing communication terminal is further configured to perform a fee deduction operation, the main control chip MCU performs the fee deduction operation according to a first preset frequency.
For example, the first preset frequency may be once every several seconds (e.g. 6 s) or once every several minutes (e.g. 1 min), so as to improve the real-time performance of power rate acquisition, calculation and deduction, so as to make a power-off response more timely, and in order to reduce the load of computing resources of the cloud background server, so as to access more electric meters, and greatly expand the access capacity of the electric meters, the second preset frequency may be set to be lower, for example, once every several hours (e.g. 1 hour).
In some embodiments, when the power-on state of the electric meter 100 changes (e.g., from power-on to power-off, or from power-off to power-on) or the arrearage state of the electric meter changes (e.g., from arrearage to arrearage, or from arrearage to arrearage), the main control chip MCU also uploads the current electric meter data information to the cloud backend server 200, so that the cloud backend server can update corresponding data in time to maintain consistency with the electric meter data stored in the edge computing communication terminal 300.
In some preferred embodiments, the meter data information further includes a prepaid balance;
and the main control chip MCU is also used for deducting the calculated electric charge from the prepaid balance of the electric meter.
Namely, the main control chip MCU is also used for executing fee deduction operation on the electricity meter 100; therefore, the fee deduction operation performed by the edge computing communication terminal 300 can further reduce the load of computing resources of the cloud background server 200, so that more electric meters can be accessed, and the electric meter access capacity can be further expanded.
In some preferred embodiments, the main control chip MCU is further configured to perform power-off control on the electricity meter when the prepaid balance of the electricity meter 100 is insufficient (i.e., the prepaid balance of the electricity meter is less than or equal to zero after the fee deduction operation is performed). Specifically, when the power-off control is executed, a switching-off command is sent to the electricity meter 100, so that the relay of the electricity meter 100 executes an action to cut off the power supply. Because the edge computing communication terminal 300 can independently control the power failure of the electricity meter 100, the power failure control can be executed more timely when the power failure is needed, and the power failure response is quicker; moreover, when the cloud network transmission fails or the cloud background server fails, the edge computing communication terminal 300 can still independently control the electric meters, so that the prepayment function of the electric meters of the electricity consumption units is not affected by the failure of the cloud background server, and the reliability is higher.
In some preferred embodiments, the electricity meter data information further includes a billing mode and a credit balance; the charging mode is a common mode, a credit mode or a power-saving mode;
accordingly, the MCU performs power-off control of the electricity meter 100 according to the billing mode and the credit balance.
For example, when the charging mode of the electricity meter 100 is the normal mode, when the prepaid balance of the electricity meter is less than zero, a switch-off instruction is directly sent to the electricity meter, so that the electricity meter is powered off.
For another example, when the billing mode of the electricity meter 100 is a power conservation mode, power is maintained even if the prepaid balance of the electricity meter is less than zero.
Or, for example, when the charging mode of the electric meter 100 is the credit mode, when the prepaid balance of the electric meter is less than zero, power is supplied to the electric meter according to the credit balance of the electric meter, and the switching-off instruction is not sent to the electric meter until the credit balance is zero. The credit balance is the balance of the credit line, and the credit line may be an electric quantity line, a time line or an amount line, so that the credit balance may be an electric quantity balance, a time balance or an amount balance correspondingly, where the electric quantity balance represents an electric quantity value that the electric meter can also use on credit, the time balance represents a duration that the electric meter can also use on credit, and the amount balance represents an electricity consumption fee that the electric meter can also use on credit.
In some preferred embodiments, the electricity meter data information further includes a low credit threshold;
the main control chip MCU is also used for sending a low credit alarm to the corresponding owner of the ammeter when the prepaid balance of the ammeter is larger than zero and smaller than a preset low credit threshold value. When the prepaid balance is larger than zero and smaller than the preset low credit threshold value, the balance is about to be exhausted, and the user can be reminded of timely recharging by sending a low credit alarm so as to avoid the condition of power failure. When a low credit alarm is sent, notification information may be sent to the cloud backend server 200, and the cloud backend server 200 then sends the low credit alarm information according to the mailbox, the mobile phone number, or the app account (such as a WeChat account, a Paibao account, or an account of a dedicated spreadsheet management program) bound by the user.
Referring to fig. 4, a flow chart of an exemplary prepaid processing procedure performed by the edge computing communication terminal 300 begins, in this embodiment, after obtaining the current popularity of the electricity meter 100: loading the prepayment parameters (including the prior degree, the electricity price, the charging mode, the prepayment balance, the low credit threshold value, the credit balance and the like of the electric meter 100) of the corresponding electric meter, if the row degree is not updated (namely the current row degree of the electric meter 100 is obtained to be the same as the loaded prior degree), indicating that the user does not use electricity, and ending the process; otherwise, calculating and deducting the electric charge, storing the latest electric meter data, after deducting the electric charge, if the prepaid balance is more than zero and less than the low credit threshold, sending out low credit alarm, if the prepaid balance is less than or equal to zero, judging whether the charging mode is credit mode, if yes, the credit balance is not exhausted, if the charging mode is not the credit mode or the credit balance is exhausted, judging whether the charging mode is the power-preserving mode or not, if so, preserving the power supply, if not, sending a switching-off instruction to the ammeter, or a switching-out request is sent to the cloud backend server 200 and processed by the cloud backend server 200 (some smart meters only execute switching-out and switching-in operations according to the data encryption instruction, and for such smart meters, the switching-out request needs to be sent to the cloud backend server 200, and the data encryption instruction is sent by the cloud backend server 200).
In some preferred embodiments, the main control chip MCU is further configured to receive encrypted electric meter data information sent by the cloud backend server 200, so as to update the current electric meter data information of the electric meter. When new electric meter data in the cloud background server 200 needs to update the corresponding electric meter (for example, electricity price change, step electricity quantity threshold change, charging mode change, and the like), the new electric meter data information is encrypted and issued to the corresponding edge computing communication terminal 300, and the edge computing communication terminal 300 updates the electric meter data of the corresponding electric meter so as to maintain the consistency of the electric meter data. The process of encrypting the electric meter data information by the cloud background server 200 may be the same as or different from the process of encrypting the electric meter data information by the main control chip MCU. After receiving the encrypted electric meter data information, the main control chip MCU firstly carries out decryption processing, and then updates the current electric meter data information of the electric meter according to the decrypted electric meter data information.
In some preferred embodiments, the main control chip MCU is further configured to perform a recharging operation, a power-off operation, or a power-on operation on the corresponding electric meter according to the encryption control instruction sent by the cloud backend server. And when the recharging operation is executed, accumulating the recharging amount in the prepayment balance of the corresponding ammeter according to the recharging amount. And when the power-off operation is executed, a switching-off instruction is sent to the corresponding electric meter so as to power off the electric meter. And when the passing operation is executed, a closing instruction is sent to the corresponding electric meter so as to electrify the electric meter.
In fact, the control instruction that the cloud backend server 200 can send to the edge computing communication terminal 300 is not limited to a recharge operation, a power-off operation, or a power-on operation instruction (where both the power-off operation and the power-on operation belong to an electric meter maintenance operation), and for example, the control instruction may also be a fee deduction operation instruction, a credit reset instruction, or the like; when the control instruction is a fee deduction operation instruction, the MCU immediately collects the use degree of the corresponding ammeter, calculates and deducts the electric fee according to the fee deduction instruction. When the control instruction is a credit reset instruction, the main control chip MCU resets the credit balance of the corresponding ammeter (namely, changes the credit balance back to the initial value of the full amount) according to the credit reset instruction.
In some preferred embodiments, after the recharging operation is performed, the main control chip MCU is further configured to perform power-on control on the corresponding electric meter according to the recharging condition. Specifically, if the charged prepaid balance is changed from being less than or equal to zero to being greater than zero, a closing instruction is sent to the corresponding electric meter, so that the relay of the electric meter acts to be powered on (for the electric meter which does not need the data encryption instruction to execute the closing operation, the closing instruction is directly generated and sent by the edge computing communication terminal 300; for the electric meter which only executes the closing operation according to the data encryption instruction, the closing instruction is generally received from the cloud background server 200 and forwarded to the electric meter, or the edge computing communication terminal 300 can generate the data encryption closing instruction and send the data encryption closing instruction to the electric meter). If a certain electric meter is powered off due to arrearage, the electric meter should be powered on immediately after the user charges the money and the charged money amount is larger than the arrearage amount, so that the loss of the user is avoided.
It should be noted that the power-off operation and the power-on operation are executed according to an instruction of the cloud backend server 200, and the power-off control and the power-on control are automatically executed by the edge computing communication terminal 300.
In order to avoid external interference or malicious transmission of a control instruction to the edge computing communication terminal 300, the edge computing communication terminal 300 performs encryption processing on data and control instruction interactive communication with the cloud backend server 200 by using a data encryption algorithm. Specifically, as shown in fig. 3, the cloud backend server 200 includes a cloud backend system and an encryptor; the cloud background server 200 sends a control instruction to the edge computing communication terminal 300 in the following manner:
A1. the cloud background system sends a dispersion factor and an eight-byte random number one to the encryption machine;
A2. the encryption machine encrypts the random number I according to a data encryption protocol to obtain a ciphertext I, and sends the random number I and the ciphertext back to the cloud end background system;
A3. the cloud background system sends a random number I, a ciphertext I, a dispersion factor and an identity authentication instruction to the edge computing communication terminal;
A4. the edge computing communication terminal encrypts the random number I according to a data encryption protocol to obtain a ciphertext II, and compares the ciphertext II with the ciphertext I to judge whether the ciphertext II and the ciphertext I are equal; if not, the authentication fails; if the authentication is equal, successfully authenticating, taking a random number II consisting of a random number of four bytes and an encrypted serial number of eight bytes, and sending the random number II to a cloud background system;
A5. the cloud background system sends the random number II, the dispersion factor, the encryption serial number, the control information and the timestamp to the encryption machine;
A6. the encryption machine carries out ciphertext calculation according to the random number II, the dispersion factor, the encryption serial number, the control information and the timestamp, and sends the encrypted control information back to the cloud background system;
A7. and the cloud background system sends the encrypted control information to the edge computing communication terminal.
Therefore, the main control chip MCU is further configured to execute the following steps when receiving the encryption control instruction sent by the cloud backend server 200:
B1. receiving a random number I, a ciphertext I, a dispersion factor and an identity authentication instruction sent by the cloud background server 200, wherein the ciphertext I is obtained by encrypting the random number I by the cloud background server according to a data encryption protocol;
B2. encrypting the random number I according to a data encryption protocol to obtain a ciphertext II, and comparing the ciphertext II with the ciphertext I to judge whether the ciphertext II and the ciphertext I are equal; if not, the authentication fails; if the authentication is equal, successfully authenticating, taking a random number II consisting of the random number of four bytes and the encryption serial number of eight bytes, and sending the random number II to the cloud background server 200;
B3. receiving encrypted control information sent back by the cloud background server 200, wherein the encrypted control information is obtained by the cloud background server through ciphertext calculation according to the random number II, the dispersion factor, the encryption serial number, the control information and the timestamp;
B4. and carrying out decryption processing on the encrypted control information to obtain decrypted control information.
And after the decrypted control information is obtained, executing corresponding operation according to the control information. In the process, identity authentication is carried out firstly, encrypted control information is received after the identity authentication is passed, corresponding operation can be executed after correct decoding is carried out, if the identity authentication cannot be passed or final decoding is incorrect, the corresponding operation cannot be executed, the double insurance effect is achieved, and the safety is higher.
Wherein, the ciphertext calculation can be performed according to an encryption algorithm, but is not limited thereto; when the encryption algorithm is adopted, the encryption serial number is an encryption algorithm serial number.
Referring to fig. 5, which is a flowchart of a downlink relay processing of the exemplary edge computing communication terminal 300, in this embodiment, when receiving an encryption command (the encryption command is transmitted through a TOKEN) or other data information (such as an electricity price table, a 02-level password, credit parameters including a credit balance, a low credit threshold, i.e., a low credit threshold, an electricity control mode including a charging mode, etc.) issued by the cloud backend server 200, the edge computing communication terminal 300 performs an uplink protocol deframing process, and starts the downlink relay processing flow: judging whether the transmission data is an operation control instruction, if so, entering an operation instruction decryption process, and if not, directly carrying out a data decryption exchange communication process; when the transmission data contains an operation control instruction, judging whether the transmission data is a TOKEN transmission identifier or a local parameter identifier, if the transmission data is the TOKEN transmission identifier, carrying out an encryption algorithm protocol decryption operation instruction, then carrying out operation (such as electricity purchasing, namely recharging, fee deduction, ammeter maintenance processing, credit reset processing and the like) according to the instruction, and further judging that the prepayment balance of a certain ammeter is greater than 0 and the ammeter is in a pull-brake state at present, starting a switch-on power connection instruction (namely sending a switch-on instruction to the corresponding ammeter); and if the local parameter identifier is the local parameter identifier, directly reading and writing the operation instruction parameter, forwarding the downlink frame and interacting power consumption data with the corresponding electric meter, and returning transfer task data if the data does not need to be interacted with the electric meter.
Referring to fig. 1, the embodiment of the present application provides a prepaid management system, including a plurality of electric meters 100 and a cloud backend server 200, and further including an edge computing communication terminal 300, where the edge computing communication terminal 300 is in communication connection with the plurality of electric meters 100 and the cloud backend server 200;
the edge computing communication terminal 300 has computing and storage capabilities and is used to:
collecting the current row degree of each accessed electric meter;
acquiring current electric meter data information corresponding to an electric meter, wherein the electric meter data information comprises the prior degree and the electricity price data;
calculating the electric charge according to the current row degree of the electric meter and the current electric meter data information;
and updating the current ammeter data information of the ammeter according to the electric charge calculation result and the current row degree, and sending the updated current ammeter data information of the ammeter to the cloud background server.
Although fig. 1 only shows a case where there is one edge computing communication terminal 300, it is not limited thereto, when the system is constructed, a plurality of edge computing communication terminals 300 may be provided as needed, each edge computing communication terminal 300 and the electric meter 100 connected thereto form an edge computing lan, and the plurality of edge computing lans constitute a distributed edge computing lan, thereby achieving a great coverage area increase.
In some embodiments, the edge computing communication terminal 300 in the prepaid management system is the edge computing communication terminal described above.
By the above, the prepayment management electric system and the edge computing communication terminal set the edge computing communication terminal between the electric meter and the cloud background server, and the edge computing communication terminal replaces the cloud background server to read the electric meter and calculate the electric charge, and sends the updated electric meter data information to the cloud background server for collection, so that the prepayment management electric system and the edge computing communication terminal have the advantages that:
1. the electric meter does not need to support the prepayment function, and the prepayment is realized by the edge computing communication terminal. The prepayment function of the existing large-scale ammeter system can be realized by only adding an edge computing communication terminal without modifying the prepayment function of the existing large-scale ammeter system, so that more prepayment function upgrading cost can be saved;
2. the edge computing communication terminal has the functions of power consumption acquisition, electricity charge measurement deduction and data storage, can run relatively independently, and does not need a cloud background server to read a large amount of ammeter data. The edge computing communication terminal can read the accessed electricity consumption data of the electric meter at a higher frequency and carry out prepayment balance computation in time, the acquisition and computation cycle is short, and the power-off and power supply responses are quicker;
3. the edge computing communication terminal bears the meter reading and prepayment computing tasks of the access ammeter, and the computing resource load of the cloud background server is greatly reduced, so that the cloud background server can access more ammeters, and the cloud background server can expand the access capacity of the ammeter due to the use of the edge computing communication terminal;
4. data transmitted by the edge computing communication terminal is encrypted through an encryption algorithm, the encrypted data are not easily subjected to external interference and malicious tampering in the data communication process with a cloud background server of an external wide area network, and the security of data transmission is greatly improved;
5. the edge computing communication terminal operates independently and is convenient to manage, the cloud background server can recover data from the edge computing communication terminal, and the edge computing communication terminal can also receive configuration parameters sent by the cloud background server, so that dual backup functions of power utilization data and power utilization balance data are achieved. Therefore, the reliability of data communication is guaranteed, when the cloud network transmission fails or the cloud background server fails, the edge computing communication terminal can still independently acquire power utilization data and perform prepayment computation, and the prepayment function of the electric meters of the power utilization units is not affected by the failure of the cloud background server.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, which are substantially the same as the present invention.
Claims (10)
1. The utility model provides an edge computing communication terminal, its characterized in that, including main control chip MCU and with main control chip MCU electric connection's down communication circuit module, upward communication circuit module, data memory and high accuracy clock, down communication circuit module is used for being connected with the ammeter communication, upward communication circuit module is used for being connected with high in the clouds backend server communication, main control chip MCU is used for:
collecting the current row degree of each accessed electric meter;
acquiring current electric meter data information corresponding to the electric meter, wherein the electric meter data information comprises the prior degree and the electricity price data;
calculating the electric charge according to the current row degree of the electric meter and the current electric meter data information;
and updating the current electric meter data information of the electric meter according to the electric charge calculation result and the current row degree, and sending the updated current electric meter data information of the electric meter to a cloud background server.
2. The edge computing communication terminal of claim 1, wherein the main control chip MCU is further configured to:
establishing a virtual ammeter data storage module for each accessed ammeter in the data storage, allocating a number for each virtual ammeter data storage module, wherein the number is the same as the unique identification number of the corresponding ammeter, and recording ammeter data information into the corresponding virtual ammeter data storage module;
and when updating the current electric meter data information of the electric meter according to the electric charge calculation result and the current popularity, storing the latest electric meter data information in the corresponding virtual electric meter data storage module.
3. The edge computing communication terminal of claim 1, wherein the main control chip MCU performs: the method comprises the steps of obtaining the current row degree of the ammeter, obtaining current ammeter data information corresponding to the ammeter, calculating the electric charge according to the current row degree of the ammeter and the current ammeter data information, and updating the current ammeter data information of the ammeter according to the electric charge calculation result and the current row degree; sending the updated current ammeter data information of the ammeter to a cloud background server according to a second preset frequency; the first preset frequency is higher than the second preset frequency.
4. The edge computing communication terminal of claim 1, wherein the meter data information further comprises a prepaid balance;
and the main control chip MCU is also used for deducting the electric charge obtained by calculation from the prepaid balance of the ammeter.
5. The edge computing communication terminal of claim 1, wherein the MCU is further configured to perform power-off control on the electric meter when a prepaid balance of the electric meter is insufficient.
6. The edge computing communication terminal of claim 5, wherein the meter data information further includes a billing mode and a credit balance; the charging mode is a common mode, a credit mode or a power-saving mode;
and the MCU executes power-off control on the electric meter according to the charging mode and the credit balance.
7. The edge computing communication terminal of claim 1, wherein the main control chip MCU is further configured to receive encrypted electric meter data information sent by a cloud backend server, so as to update current electric meter data information of the electric meter.
8. The edge computing communication terminal of claim 1, wherein the main control chip MCU is further configured to perform a charging operation, a power-off operation, or a power-on operation on the corresponding electric meter according to the encryption control command sent by the cloud backend server.
9. The edge computing communication terminal of claim 8, wherein the MCU is further configured to, upon receiving an encryption control command sent by the cloud backend server,
receiving a random number I, a ciphertext I, a dispersion factor and an identity authentication instruction sent by the cloud background server, wherein the ciphertext I is obtained by encrypting the random number I by the cloud background server according to a data encryption protocol;
encrypting the random number I according to a data encryption protocol to obtain a ciphertext II, and comparing the ciphertext II with the ciphertext I to judge whether the ciphertext II and the ciphertext I are equal; if not, the authentication fails; if the authentication is equal, successfully authenticating, taking a random number II consisting of a random number of four bytes and an encrypted serial number of eight bytes, and sending the random number II to the cloud background server;
receiving encrypted control information sent back by the cloud background server, wherein the encrypted control information is obtained by the cloud background server through ciphertext calculation according to the random number II, the dispersion factor, the encrypted serial number, the control information and the timestamp;
and carrying out decryption processing on the encrypted control information to obtain decrypted control information.
10. A prepayment management system comprises a plurality of electric meters and a cloud background server, and is characterized by further comprising an edge computing communication terminal, wherein the edge computing communication terminal is in communication connection with the electric meters and the cloud background server;
the edge computing communication terminal has computing and storage capabilities and is used for:
collecting the current row degree of each accessed electric meter;
acquiring current electric meter data information corresponding to the electric meter, wherein the electric meter data information comprises the prior degree and the electricity price data;
calculating the electric charge according to the current row degree of the electric meter and the current electric meter data information;
and updating the current electric meter data information of the electric meter according to the electric charge calculation result and the current row degree, and sending the updated current electric meter data information of the electric meter to a cloud background server.
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Application publication date: 20201201 Assignee: GUANGDONG RUIZHOU TECHNOLOGY Co.,Ltd. Assignor: HODI TECHNOLOGIES Co.,Ltd. Contract record no.: X2022980026542 Denomination of invention: Prepaid management system and edge computing communication terminal Granted publication date: 20210316 License type: Common License Record date: 20221214 |