CN202362855U - Intelligent access control system for transformer substation - Google Patents
Intelligent access control system for transformer substation Download PDFInfo
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- CN202362855U CN202362855U CN2011205266450U CN201120526645U CN202362855U CN 202362855 U CN202362855 U CN 202362855U CN 2011205266450 U CN2011205266450 U CN 2011205266450U CN 201120526645 U CN201120526645 U CN 201120526645U CN 202362855 U CN202362855 U CN 202362855U
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Abstract
The utility model discloses an intelligent access control system for a transformer substation. The intelligent access control system comprises an access control server, a communication and an access control unit, wherein the access control unit comprises an access controller, an access control terminal, a card reader, a keyboard, an electric control lock and a door sensor; the access control server is connected with the access controller through the communication unit; the access controller is connected with the access control terminal through an RS485 connecting wire; and the card reader, the keyboard, the electric control lock and the door sensor are connected to the access control terminal. The system has four door unlocking and locking modes, namely an electronic key, a network hopping code, a mobile hopping code and remote unlocking and locking, and information about the unlocking mode and locking and unlocking time of each time is recorded to realize the one-card and on-stop unlocking of the transformer substation. The intelligent access control system and an intelligent access control method for the transformer substation of a centralized control center in an unattended mode, the commute of transformer substation operation and maintenance personnel between the transformer substation and the centralized control center due to a key is avoided, and the flexibility, safety and economy of access control management over the transformer substation are greatly improved.
Description
Technical field
The utility model relates to the intelligent substation gate control system, relates in particular to collection control center and adds the intelligent substation gate control system under the unattended substation pattern.
Background technology
Along with the development of power automation technology, the transformer station in the electric system has realized unattended basically, and the operation maintenance of transformer station has adopted collection control center to add unwatched pattern.The work such as the external personnel's construction of daily tour, operation and permission of a plurality of transformer stations in the zone are responsible at a collection control center, and entering transformer station must arrive collection control center and get the serial key of corresponding transformer station.Transformer station distributes and often relatively disperses, and the door lock of its gate, pulpit and switch system chamber etc. adopts mechanical lock, numerous uses of key and difficult management usually.The problem of opening the door of unattended substation has become the importance that efficient is made in influence down, and when emergency operation or accident treatment, the operations staff need travel to and fro between to get between collection control center and the transformer station and go back key; When external staff need get into transformer station, must travel to and fro between equally to get between collection control center and the transformer station and go back key.After State Grid Corporation of China carried out electrical network " general overhaul " pattern, the O&M work of the 220kV transformer station in the prefecture-level city was responsible at a collection control center, and the region span can reach hundred kilometers, because the problem of key takies more time.
At present Automation of Electric Systems can write down and upload real-time working condition and the action situation of any equipment of transformer station, uploads less than writing down but open with personnel's turnover situation for transformer station and gate, pulpit.Tour cycle management and external personnel's entrance management for the staff of transformer station can only be unfavorable for strengthening the safe operation management of power transformation through the inquiry mode.Therefore, utilize existing Internet resources in the present transformer station, it is very necessary to design a cover intelligent entrance guard management system.
Summary of the invention
The purpose of the utility model is: a kind of intelligent substation gate control system is provided, and centralized management saves time.
The technical solution of the utility model is: intelligent access control system comprises gate inhibition's server, communication unit, gate inhibition unit, frame hopping mobile phone; Wherein the gate inhibition unit comprises access controller, gate inhibition terminal, card reader and keyboard, electric control lock, door magnetic; Gate inhibition's server is connected with access controller through communication unit; Access controller is connected with the gate inhibition terminal through the RS485 connecting line, and card reader and keyboard, electric control lock, door magnetic are connected to the gate inhibition terminal; Do not write to each other in frame hopping mobile phone and gate inhibition's server, gate inhibition unit, it is installed and the corresponding frame hopping generating routine of transformer station's access controller algorithm.
Described intelligent substation gate control system; Communication unit comprises LAN (electrical management information Da Qu MIS net); The netting twine interface of server, in the equal access to LAN of netting twine interface of gate inhibition's server and access controller, gate inhibition's server is connected with access controller through communication unit.
Described intelligent substation gate control system, access controller is connected with the gate inhibition terminal through the RS485 connecting line, and 1 access controller can connect 8 gate inhibition terminals.
Described intelligent substation gate control system, gate inhibition terminal connect card reader, keyboard, electric control lock, door magnetic.
Described intelligent substation gate control system has electron key, network frame hopping, mobile phone frame hopping and long-range four kinds of modes of locking a door of opening the door, and writes down mode and the information of switch door time of at every turn unblanking; The electron key mode of opening the door is that the mode that adopts the RFID contactless card to add the individual identification password is opened the door; When power transformation O&M personnel need get into transformer station; Whether the handhold RFID contactless card is authorized by access controller identification through card reader; Input the individual identification password again, after both are entirely true, send instruction by access controller and open electric control lock through the gate inhibition terminal; After electric control lock is opened; Power transformation O&M personnel open the door and get in the transformer station; The time that access controller will be inputed mode, time and the switch door of password deposits in the controller automatically and is uploaded in gate inhibition's server, and electron key opens the door and do not rely on communication network and gate inhibition's server; The electron key mode that adopts the RFID contactless card to add the individual identification password of opening the door is opened the door, even other people find the RFID contactless card lost because no corresponding person identification password also can't be unblanked; The intelligent substation gate control system can be provided with corresponding all the local transformer stations of RFID contactless card through gate inhibition's server, realizes transformer station's all-purpose card that opens the door; The network frame hopping mode of opening the door is that gate inhibition's server produces frame hopping and is issued in the access controller through network and opens the door; When the O&M personnel of transformer station do not carry RFID contactless card or other personnel of entering the station need get into transformer station the time; Produced a frame hopping at random and be issued in the access controller of corresponding transformer station by gate inhibition's server, the term of validity of password is 5-10 minute; Collection control center operator on duty informs the personnel of entering the station through phone or short message mode, and the personnel of entering the station are through keyboard input frame hopping, and frame hopping is compared and computing time under access controller and the server; Frame hopping is correct and in time range, then sends instruction by access controller and opens electric control lock through the gate inhibition terminal; After electric control lock is opened; The personnel of entering the station open the door and get in the transformer station; The time that access controller will be inputed mode, time and the switch door of password deposits in the controller automatically and is uploaded in gate inhibition's server, and gate inhibition's server produces soft frame hopping and depends on communication network and gate inhibition's server; The soft frame hopping of the each generation of gate inhibition's server all is at random, and free restriction, has avoided password leakage arbitrarily to get into the generation of transformer station's situation; It is collection control center not have the operator on duty when the O&M personnel of transformer station carry RFID contactless card or other personnel of entering the station need get into transformer station the time that mobile phone frame hopping mode is opened the door, and on public mobile phone on duty, is produced the frame hopping of a corresponding transformer station access controller by collection control central value squad leader; Select corresponding transformer station to generate a frame hopping at mobile phone frame hopping generator program, inform the personnel of entering the station through phone or short message mode, the personnel of entering the station are through keyboard input frame hopping, and access controller carries out the computing deciphering and confirms; Frame hopping is correct and in time range, then send instruction by access controller and open electric control lock through the gate inhibition terminal; After electric control lock was opened, the staff opened the door and gets in the transformer station, and the time that access controller will be inputed mode, time and the switch door of password deposits in the controller automatically and is uploaded in gate inhibition's server; The mobile phone frame hopping does not rely on communication network and gate inhibition's server; One group of frame hopping generating algorithm is arranged in the mobile phone frame hopping generator program, and the AES of a corresponding transformer station calls rule list; Then there be a decipherment algorithm corresponding to call rule and one group of cryptographic decryption algorithm in the decrypted program of transformer station's access controller with controller; The cryptographic algorithm of each each period of transformer station all is inequality; Paragraph controller is consistent with the server password algorithm when same; And the both is as variable with date and time; Even the password that is produced under the situation that algorithm repeats can not repeat yet, the frame hopping that mobile phone produces only has in the period effective; The long-range mode of opening the door is that the operator on duty directly opens the door lock of transformer station at gate inhibition's server at collection control center through network; When in emergency circumstances the personnel of entering the station need get into transformer station immediately; Telephone contact collection control center personnel, collection control center personnel operate the long-range transformer station's door lock of directly opening on gate inhibition's server; After electric control lock was opened, the personnel of entering the station opened the door and get in the transformer station, and the time that access controller will be inputed mode, time and the switch door of password deposits in the controller automatically and is uploaded in gate inhibition's server.
The utility model technical scheme has following advantage:
1, the intelligent substation gate control system is utilized existing power information net; Between collection control center and transformer station, make up access control system, the access controller at each transformer station station promptly can independently be controlled, and can receive gate inhibition's server admin again; The intelligent substation gate inhibition has electron key, network frame hopping, mobile phone frame hopping and long-range four kinds of modes of unblanking; Avoided that mechanism's lock key is many, the shortcoming of transreplication, the intelligent substation gate inhibition has rights management flexibly, and a rfid card is to the gate inhibition with regard to all transformer stations; Realize transformer station open the door " all-purpose card; The corresponding several personnel of rfid card; Open all gate inhibitions of our station " station is logical " through the configuration transformer station gate input password of once swiping the card, rapidly and efficiently open the door, because a rfid card has corresponding individual identification password just can open the door; I.e. use is lost rfid card and also can't be opened transformer station's door; Have very high security, do not having under the situation of rfid card, can open the door through the network frame hopping of gate inhibition's server generation or the frame hopping of public mobile phone generation on duty by collection control center personnel; Frame hopping all has certain effective time and has nothing in common with each other at every turn, and it is more convenient that intelligent entrance guard is used.The remote unlocking of gate inhibition's server then provides the express passway of an entering transformer station.
2, through gate inhibition's server staff's authority, turnover time and the mode of entrance of turnover transformer station carried out intelligent management, safe ready, turnover personnel of server real-time monitoring transformer station and corresponding event; And store corresponding data simultaneously; In order to inquiry, every turnover personnel have independently information, can or cancel its right to use through software systems foundation; Increase or reduce the right to use, assurance is provided for taking precautions against from the intrusion of normal channel.System can also realize the clearly qualification to personnel's authority, no matter is internal staff or external staff, can clearly define the scope that can free in and out through the setting to authority, and record is in order to inquiry.
3, intelligent substation gate inhibition's use; Power transformation O&M personnel have been avoided because the reason of key hurrying back and forth back and forth at transformer station and collection control center; Reduced other staff of entering the station and gone back key and frequently come and go, reduced transport cost, improved work efficiency because of getting; Accelerated response, greatly improved dirigibility, security and the economy of transformer station's entrance guard management substation accident.
Description of drawings
Fig. 1 is the structure principle chart of intelligent substation gate control system.
Fig. 2 is an intelligent substation gate control system access controller structural drawing.
Fig. 3 is intelligent substation gate control system gate inhibition terminal structure figure.
Fig. 4 is an intelligent substation gate control system control flow chart.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
The intelligent substation gate control system of the utility model; As shown in Figure 1; Comprise gate inhibition's server, communication unit, gate inhibition unit, frame hopping mobile phone, wherein the gate inhibition unit comprises access controller, gate inhibition terminal, card reader and keyboard, electric control lock, door magnetic, and gate inhibition's server is connected with access controller through communication unit; Access controller is connected with the gate inhibition terminal through the RS485 connecting line, and card reader and keyboard, electric control lock, door magnetic are connected to the gate inhibition terminal; Do not write to each other in frame hopping mobile phone and gate inhibition's server, gate inhibition unit, it is installed and the corresponding frame hopping generating routine of transformer station's access controller algorithm.
Gate inhibition's server links to each other through Ethernet with the access controller of each transformer station, and each transformer station's access controller is controlled and managed; Gate inhibition's server is issued to RFID contactless card string number and corresponding individual identification password in the corresponding access controller, forms the electron key database; After the RFID contactless card is lost, through the RFID contactless card string in the server deletion access controller number, this RFID contactless card was lost efficacy, power transformation O&M personnel carry out the modification of individual identification password on server; Collection control center personnel select corresponding transformer station to produce a frame hopping through gate inhibition's server, and frame hopping is issued to robotization in the controller of corresponding transformer station, is used for opening the door lock of corresponding transformer station; The term of validity of frame hopping can be provided with, frame hopping can act on corresponding transformer station all receive control door lock or certain several controlled door lock; Password producing method, time and the operating personnel of each transformer station of the automatic acquisition and recording of gate inhibition's server; And show each transformer station's door lock state in real time; The record gate inhibition of transformer station password input mode, time, correctness and switch door time, form the daily record of intelligent substation access control system.
The frame hopping mobile phone is the smart mobile phone that the gate inhibition of transformer station frame hopping program has been installed, and collecting the control center usually has a public mobile phone on duty, by chief operator's keeping of every value, uses as spare communication; The utility model intelligent substation gate control system has respectively been developed an intelligent substation frame hopping generating routine based on mobile phone Windows Mobile and Android system platform, is applicable on the smart mobile phone more than 80% and installs and uses; One group of password generating algorithm is arranged in the cell phone password generator program, and the decipherment algorithm of a corresponding transformer station calls rule list; Have a decipherment algorithm corresponding with controller to call rule and one group of cryptographic decryption algorithm in the decrypted program of transformer station's access controller, the mobile phone frame hopping mode of opening the door does not rely on communication network and gate inhibition's server.
The gate inhibition unit of each transformer station promptly can independently use as gate inhibition's control module, can accept instruction and transmission information and gate inhibition's server again and constitute intelligent access control system; Access controller inserts the power information MIS network switch of transformer station, is connected with each gate inhibition terminal through the RS485 order wire; Access controller is accepted through Ethernet and storage gate inhibition server issues effective RFID contactless card information and individual identification password; Accept the frame hopping that gate inhibition's server issues; Accept the door magnetic signal of card using information that the gate inhibition terminal collects, keyboard input signal, switch door; Comparison RFID contactless card information and individual identification password; Frame hopping to accepting carries out secure processing device encrypts, instruction gate inhibition terminal control electric control lock, and with password input mode, whether effectively go into storer and upload in gate inhibition's server with switch door time keeping.
Access controller; As shown in Figure 2; Mainly containing microprocessor, memory circuit, clock circuit, Ethernet control circuit, 485 control circuits connects and composes; Microprocessor is used for calculating password and comparison information; Memory circuit mainly is used for storing the configuration parameter of access controller, the effectively interim frame hopping that issues of RFID contactless card information and individual identification password, server, switch door time keeping etc., and clock circuit is the time that microprocessor provides work clock, password input and switch door, and the Ethernet control circuit is used for access controller and serves group-net communication through Ethernet and gate inhibition; 485 control circuits are access controller and gate inhibition's terminal communication, and an access controller can be with 8 gate inhibition terminals at most.
The gate inhibition terminal is the final performance element of intelligent entrance guard, and is as shown in Figure 3, comprises microprocessor, keyboard scanning circuit, RFID Card Reader circuit, door magnetic signal input circuit, electric control lock driving circuit, 485 control circuits, signal circuit; RFID Card Reader circuit, RFID contactless card are during near panel; Receive the radiofrequency signal that plug-in reader sends; Rely on the energy that induction current obtained to send out the product information that is stored in the chip; After the Card Reader circuit reads information and decoding, after microprocessor adds local information, deliver to access controller and carry out the relevant data processing; Keyboard scanning circuit is accepted the encrypted message of keyboard input, after microprocessor adds local information, delivers to access controller and carries out the relevant data processing; The opening and closing behavior that door magnetic signal input circuit is used for writing down the power transformation door is delivered to access controller and is carried out the relevant data processing after microprocessor adds local information; 485 control circuits mainly realize and the communicating by letter of access controller, microprocessor will accept local terminal to information processing deliver in the access controller, the access controller instruction of accepting is made an explanation carries out through electric control lock driving circuit, signal circuit; The electric control lock driving circuit is according to the directly opening and closing of driving electric control lock of instruction, signal circuit to swipe the card successfully, the switching of password correctness, electric control lock makes voice suggestion.
With an embodiment intelligent substation gate control system and control method thereof are described below.
The operation maintenance work of 15 transformer stations is responsible at the collection control center of a power transformation operation, adopts " 3+2 " order of classes or grades at school mode, and 24 hours wheels of 3 order of classes or grades at school change the operation of responsible transformer station on duty, and 2 order of classes or grades at school Chang Baiban are responsible for the daily tour work of transformer station; At collection control center 1 gate inhibition's server is installed, 15 transformer stations install the intelligent entrance guard unit respectively; As at certain transformer station gate, control building door and pulpit door three places install the gate inhibition terminal, access controller is installed on during the secondary pulpit in shields; The key locker of depositing other rooms of our station and equipment is arranged in the pulpit, get into the door that the pulpit personnel can get key operated corresponding room and equipment as required.
When the power transformation O&M personnel at collection control center carry out daily tour of transformer station or operation, only need just can get into any transformer station of compass of competency with 1 rfid card; During to transformer station, input individual identification password after power transformation O&M personnel swipe the card correctly, access controller and reservoir internal information are compared, and corresponding gate inhibition is opened in correct back, and recorded information is uploaded in gate inhibition's server; Gate inhibition's server shows in real time which kind of personnel of certain transformer station are so that where mode is worth the time to open the gate inhibition; Can rfid card be arranged to " station is logical " in a transformer station, behind any one card reader Card Reader of our station and input individual identification password, can in short-term, open all gate inhibitions of our station.The power transformation O&M personnel of the corresponding a plurality of order of classes or grades at school of rfid card distinguish through the individual identification password; During power transformation O&M personnel end-of-job, closing control chamber door, control building door and transformer station gate, the gate inhibition will automatically lock, and the information uploading gate inhibition server of will closing the door; When power transformation O&M personnel receive instruction midway need get into other transformer stations the time, need not to return to collection control center and get key, get into corresponding transformer station by above-mentioned steps.
When non-power transformation O&M personnel get into transformer station's work, must get key to collection control center and get into transformer station's work, arrive also key of collection control center behind the end-of-job; When adopting the intelligent substation gate inhibition, enter the station to collection control center calling application when the personnel of entering the station arrive transformer station, collection control center operator on duty selects corresponding transformer station to produce frame hopping on gate inhibition's server, and the staff imports frame hopping and gets into transformer station; Do not have the operator on duty when collection control center, can produce frame hopping in the corresponding transformer station of the frame hopping procedure Selection of its public mobile phone of holding on duty by the chief operator, the personnel of entering the station import frame hopping and get into transformer station; When emergency condition next part control center personnel operate the long-range transformer station's door lock of directly opening on gate inhibition's server, the relevant personnel of entering the station get into transformer station and carry out work.
As shown in Figure 4, the job step of gate inhibition unit is following:
A), access controller swiping the card and encrypted message of judging whether that anteport gate inhibition terminal sends here, if any getting into step b); Do not swipe the card and encrypted message, return step a);
B) if card using information then gets into c); If the password input information then gets into;
C), access controller blocks validity checking, through reading customer data base, check this card number whether exist with effectively, if exist and effectively, get into step d); Do not exist or dead card like card number, return step a) after the voice suggestion;
D), voice suggestion is imported the individual identification password, the input of wait password;
E), controller compares individual identification password and the data of reservoir of input, as if password useless, then returns step d); Password is correct, then gets into step I);
F), whether gate inhibition's server issue frame hopping, as issues, and then gets into step g); Otherwise, get into step h);
G), access controller compares the frame hopping that password and the server of input issues and the time judgement, effectively then gets into step I); The invalid step a) of then after voice suggestion, returning;
H), controller thinks that this input password is the frame hopping that mobile phone produces, and calls the frame hopping decrypted program and deciphers, and effectively then gets into step I); The invalid step a) of then after voice suggestion, returning;
I), the input of voice suggestion password is correct; The scope that control is opened the door according to preset password is opened the three road gate inhibitions or the first road gate inhibition; Record is this time swiped the card, information such as password input mode and time, and sends the situation information of this time opening the door to server, finishes this flow process.If the preset password range of control is the first road gate inhibition, then follow-up gate inhibition repeats by above-mentioned steps.
Access controller all has voice suggestion in the utility model when swiping the card at every turn and inputing password, and when using rfid card to add the electron key of individual identification password, continuous 5 input individual identification password mistakes will be returned waiting status, need swipe the card again; When using frame hopping, continuous 5 input password mistakes need be applied for frame hopping again.
Claims (2)
1. intelligent substation gate control system; It is characterized in that: this gate control system comprises gate inhibition's server, communication unit, gate inhibition unit, frame hopping mobile phone; Wherein the gate inhibition unit comprises access controller, gate inhibition terminal, card reader and keyboard, electric control lock, door magnetic; Gate inhibition's server is connected with access controller through communication unit, and access controller is connected with the gate inhibition terminal through the RS485 connecting line, and card reader and keyboard, electric control lock, door magnetic are connected to the gate inhibition terminal.
2. intelligent substation access control system as claimed in claim 1 is characterized in that: do not write to each other in frame hopping mobile phone and gate inhibition's server, gate inhibition unit, and it has been installed and the corresponding frame hopping generating routine of transformer station's access controller algorithm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011205266450U CN202362855U (en) | 2011-12-16 | 2011-12-16 | Intelligent access control system for transformer substation |
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| CN2011205266450U CN202362855U (en) | 2011-12-16 | 2011-12-16 | Intelligent access control system for transformer substation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521905A (en) * | 2011-12-16 | 2012-06-27 | 江苏省电力公司金湖县供电公司 | Intelligent access control system of transformer substation and control method thereof |
| CN102867347A (en) * | 2012-08-03 | 2013-01-09 | 合肥天智科技发展有限公司 | RFID (radio frequency identification) wireless interconnection safety control intelligent terminal management system |
| CN103136830A (en) * | 2013-02-18 | 2013-06-05 | 江苏省电力公司金湖县供电公司 | Communication-free hopping code generation method of access control system |
| CN103208142A (en) * | 2013-03-14 | 2013-07-17 | 牟宗清 | Intelligent access control system and signal projector |
| CN103218867A (en) * | 2013-05-08 | 2013-07-24 | 北京合众研创科技有限公司 | Intelligent entrance guard system of transformer substation |
| CN104008588A (en) * | 2014-06-09 | 2014-08-27 | 滁州惠智科技服务有限公司 | Intelligent light-control key based on visible light communication |
| WO2014139331A1 (en) * | 2013-03-14 | 2014-09-18 | Mou Zongqing | Smart entry system and controller |
| CN104464050A (en) * | 2014-11-17 | 2015-03-25 | 国家电网公司 | Transformer substation gate operation management system |
| CN107341879A (en) * | 2017-06-15 | 2017-11-10 | 鲸通智能科技有限公司 | A kind of smart lock unlocking method and system based on NFC |
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| CN102521905B (en) * | 2011-12-16 | 2014-05-07 | 江苏省电力公司金湖县供电公司 | Intelligent access control system of transformer substation and control method thereof |
| CN102521905A (en) * | 2011-12-16 | 2012-06-27 | 江苏省电力公司金湖县供电公司 | Intelligent access control system of transformer substation and control method thereof |
| CN102867347A (en) * | 2012-08-03 | 2013-01-09 | 合肥天智科技发展有限公司 | RFID (radio frequency identification) wireless interconnection safety control intelligent terminal management system |
| CN102867347B (en) * | 2012-08-03 | 2016-12-21 | 安徽天智信息科技集团股份有限公司 | RFID wireless interconnected security control Intelligent door lock administration system |
| CN103136830A (en) * | 2013-02-18 | 2013-06-05 | 江苏省电力公司金湖县供电公司 | Communication-free hopping code generation method of access control system |
| CN103208142B (en) * | 2013-03-14 | 2016-04-20 | 牟宗清 | Hotel's intelligent access control system |
| WO2014139331A1 (en) * | 2013-03-14 | 2014-09-18 | Mou Zongqing | Smart entry system and controller |
| CN103208142A (en) * | 2013-03-14 | 2013-07-17 | 牟宗清 | Intelligent access control system and signal projector |
| CN103218867A (en) * | 2013-05-08 | 2013-07-24 | 北京合众研创科技有限公司 | Intelligent entrance guard system of transformer substation |
| CN104008588A (en) * | 2014-06-09 | 2014-08-27 | 滁州惠智科技服务有限公司 | Intelligent light-control key based on visible light communication |
| CN104008588B (en) * | 2014-06-09 | 2017-02-22 | 温州众合拉链有限公司 | Intelligent light-control key based on visible light communication |
| CN104464050A (en) * | 2014-11-17 | 2015-03-25 | 国家电网公司 | Transformer substation gate operation management system |
| CN107341879A (en) * | 2017-06-15 | 2017-11-10 | 鲸通智能科技有限公司 | A kind of smart lock unlocking method and system based on NFC |
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