CN206672194U - A kind of intelligent access control system - Google Patents
A kind of intelligent access control system Download PDFInfo
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- CN206672194U CN206672194U CN201720008614.3U CN201720008614U CN206672194U CN 206672194 U CN206672194 U CN 206672194U CN 201720008614 U CN201720008614 U CN 201720008614U CN 206672194 U CN206672194 U CN 206672194U
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Abstract
The utility model discloses a kind of intelligent access control system, including gate inhibition's main frame, terminal device, server, gate inhibition's main frame includes access control mainboard and the electric control lock being connected respectively with access control mainboard, gate inhibition's communication module, gate inhibition's input module, gate inhibition's voice module, the server includes sip proxy server, the sip proxy server includes processor and coupled memory, SIP communication modules, PSTN communication modules, the terminal device includes terminal control mainboard and coupled terminal called module, terminal speech module, terminal input module, gate inhibition's main frame, terminal device passes through gate inhibition's communication module, terminal called module is connected with SIP communication module data respectively, the PSTN communication modules are connected with pstn telephone net.The utility model has the characteristics that low low cost of equipment, speech and data application integration, bandwidth demand, wide usability of IP, equipment not online switchable PSTN, it is user-friendly, safe and reliable efficiently.
Description
Technical field
Gate inhibition's technical field is the utility model is related to, in particular it relates to which a kind of be based on voip technology and PSTN technology intercommunications
The intelligent access control system of function.
Background technology
With the development of society and the progress of science and technology, people are to the demand more and more higher of security protection, particularly in residential building,
To ensure the security of the lives and property of the resident of whole unit, the gate control system that cell building unit is more and more installed.For just
In carrying out gate inhibition's enabling to visiting personnel, existing technology is usually to utilize phone gate inhibition's control device, by being connected to door
Mouthful extension, it is necessary to when opening the door, the phone inside room is put through on door machine by visitor, internal staff passes through phone confirmation
After visitor's identity, password is inputted on phone, remotely can be opened door.This phone gate inhibition is mainly by main frame, extension set, UPS
Power supply, electric control lock and door closer etc. are formed, and gate control system and telephone network are integrated, and solve resident family and visitor enters
Safety problem.But this access controller device is merely able to realize gate control system and landline telephone and specific door in room
Prohibit device combination, visiting personnel there is no an access card and resident family do not hear the tinkle of bells prompting of landline telephone when, this device is just
Seem at a loss as to what to do.In particular with the commonly used of the Mobile portable smart machine such as smart mobile phone, answer and operate fixed electricity
Words identification visiting personnel identity is not only inconvenient to operate, and is also easy to be imitated by malicious person and pretends to be friends and family or working people
Member and be mixed into unit building.
Utility model content
The purpose of this utility model is to provide a kind of intelligent entrance guard based on voip technology and PSTN technology intercommunication functions
System, to solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides following technical scheme：
A kind of intelligent access control system, including gate inhibition's main frame, terminal device, server, gate inhibition's main frame are controlled including gate inhibition
Mainboard processed and the electric control lock being connected respectively with access control mainboard, gate inhibition's communication module, gate inhibition's input module, gate inhibition's voice mould
Block, the server include sip proxy server, and the SIP proxy servers include processor and coupled storage
Device, SIP communication modules, PSTN communication modules, the terminal device include terminal control mainboard and coupled terminal called
Module, terminal speech module, terminal input module, gate inhibition's main frame, terminal device pass through gate inhibition's communication module, terminal
Communication module is connected with SIP communication module data respectively, and the PSTN communication modules are connected with pstn telephone net, and the SIP leads to
Interrogate module and data transfer is carried out using voip technology with terminal called module, gate inhibition's communication module respectively, pass through sip agent service
Device is authenticated and route, and terminal called module, gate inhibition's communication module are conversated control using Session Initiation Protocol, pass through SDP agreements
Coding negotiation is carried out, media transmission is carried out by Real-time Transport Protocol., can be to terminal devices such as smart mobile phones by sip proxy server
Carry out identification authentication, call routing, NAT are penetrated, support agency, redirect, the function such as registration positioning user, by SIP with
The agreements such as RTP/RTCP, SDP, RTSP, DNS coordinate, and can support and applied to multimedia services such as voice, video, data, thus
With multiple functions such as video, speech communications；Gate inhibition's main frame main actions are initiation registration, invitation session etc.；Terminal is set
The actions such as standby major function is receives session request, access control main frame opens the door.Here, by sip proxy server, intelligence can be made
The voice request and realize voice call that energy mobile phone is transmitted using internet reception gate inhibition's voice module, with cost is cheap, makes
The characteristics of with facilitating, it is not necessary to which resident family specially goes to answer located at the indoor landline telephone for passing through wired connection with gate inhibition.Here,
The server is the Cloud Server using x86 server constructions, and gate inhibition's main frame is carried out by accessing internet with Cloud Server
Communication.
Preferably, gate inhibition's main frame also includes the gate inhibition's photographing module being connected with access control mainboard, and the terminal is set
The standby terminal display module for including being connected with terminal control mainboard.Gate inhibition's photographing module is set, the same of speech talkback can carried out
When, the video information of the visitor before gate inhibition's main frame is transmitted to terminal display module by photographing module and shown, so as to have
Video intercommunication function.
Further, the terminal device also includes the terminal photographing module being connected with terminal control mainboard, the gate inhibition
Main frame also includes the gate inhibition's display module being connected with access control mainboard.So, the video image of visitor can be watched in resident family
While, house also may be selected to provide the video image information of oneself by gate inhibition's display module of gate inhibition's main frame to visitor, from
And realize two-way video intercommunication.
Preferably, the server also includes Web server, push server, and gate inhibition's main frame, terminal device pass through
HTTPs agreements are connected with the Web server data, are connected by Transmission Control Protocol with the push server data.The Web
Server is mainly to provide http protocol transmission and accesses picture, house property information, enabling record information；The push server is main
It is to be issued for carrying out property notice, device software version updating, push does not wake up application function to APP online.
In order to preferably be dissolved into estate management, it is easy to infrastructure management company to go to manage whole cell or the personnel in some place
Disengaging, with safety in support area, it is preferred that the intelligent access control system also includes estate management machine, the estate management machine
The estate management communication module that is connected including estate management control mainboard and respectively with estate management control mainboard, estate management are defeated
Enter module, estate management display module, the estate management communication module is connected with the SIP communication modules data, with service
Device establishes data communication.After estate management machine communicates with server foundation, it is visual right to be carried out by sip proxy server
Say；The video data of correlation and data of taking pictures can be obtained by Web server, instruction can be pushed to by push server
Each user, user is set to obtain estate management information and notice in time.
Further, the estate management input module includes character input unit and voice-input unit, in order to energy
Enough established and connected by sip proxy server and the terminal device of user, realize voice call.
In the case of having lived in more people simultaneously in one set of room, terminal device is carried and gone out by a certain user sometimes, and indoor
The terminal device will not cause some to control the inconvenient of gate inhibition's main frame to some members, it is preferred that the intelligent entrance guard system
System also includes indoor set, ad hoc in user room, is used as a fixed terminal device, the indoor set includes room
Interior control mainboard and the indoor display module being connected respectively with indoor control mainboard, indoor input module, indoor communication module, room
Interior communication module is connected with the SIP communication module data of the SIP proxy servers.
It can be rapidly introduced into for the ease of user in door, it is preferred that gate inhibition's main frame also includes and access control master
The connected gate inhibition's radio frequency identification module of plate, to read the RF tag of resident family, that is, the information of enabling magnetic card and enabling.
For the purpose of utility model is better achieved, here, a kind of application method of intelligent access control system is also provided, including
Following steps：
S1. visitor inputs legal room number by gate inhibition's input module of gate inhibition's main frame and initiates calling, by access control master
Plate connects SIP communication modules by gate inhibition's communication module, by sip proxy server again to the terminal called module of terminal device
Calling is initiated, terminal called module is initiated by calling the tinkle of bells prompting by terminal control mainboard by terminal speech module；
S2. within a certain period of time, resident family is received after hearing the tinkle of bells prompting by operating the terminal input module of terminal device
Calling, then the data connected by sip proxy server between gate inhibition's main frame and terminal device connect, gate inhibition's main frame and terminal
Under equipment in sip proxy server by connecting, by Session Initiation Protocol conversate control, Real-time Transport Protocol carry out media transmission, from
And realize voice, video intercommunication function；
S3. resident family while terminating intercommunication, prompts after visitor's identity is confirmed by video and/or audio according to program
Whether open the door and operate, such as allow visitor to enter unit building, then dual-tone multifrequency (DTMF-Dual Tone are sent by terminal device
Multi Frequency) door open command, coding negotiation, access control main frame are carried out by SDP agreements through sip proxy server
Open the door.
Preferably, when gate inhibition's main frame initiate calling and by SIP communication modules connect it is called not online when, it is described
Calling is gone to PSTN (PSTN-Public Switched by sip proxy server by PSTN communication modules
Telephone Network), speech talkback is carried out by traditional liaison mode, after confirming visitor's identity by house, operation connects
The telephone plant listened sends dual-tone multifrequency (DTMF-Dual Tone Multi Frequency) by PSTN
To issue door open command, so as to effectively increase connected ratio.
Preferably, the sip proxy server is during video and/or audio intercommunication, by processor by video and/
Or audio encryption is stored in memory, the estate management machine can be consulted the information of storage according to authority.So, exist
During generation safety problem, relevant information can be transferred by public security department, consequently facilitating post-mordem forensics are solved a case, further enhancing peace
Quan Xing.
Compared with prior art, the beneficial effects of the utility model are：Intelligent access control system described in the utility model, passes through
Sip proxy server carries out transfer, comprehensively utilizes in voip technology and PSTN technologies, while compatible SIP and PSTN sends double-tone
Multifrequency (DTMF-Dual Tone Multi Frequency) issues door open command, realizes video and/or audio intercommunication, has
There are low low cost of equipment, speech and data application integration, bandwidth demand, wide usability of IP, equipment not online switchable
The features such as PSTN, user-friendly, safe and reliable efficient, application prospect is extensive.
Brief description of the drawings
Fig. 1 is the overall topology figure of the utility model embodiment；
Fig. 2 is the structure principle chart of the utility model embodiment gate inhibition's main frame；
Fig. 3 is the structure principle chart of the utility model embodiment sip proxy server；
Fig. 4 is the structure principle chart of the utility model embodiment terminal device；
Fig. 5 is the workflow diagram of the utility model embodiment；
Fig. 6 is the topology diagram of the utility model embodiment sip proxy server connection；
Fig. 7 is the topology diagram of the utility model embodiment Web server connection；
Fig. 8 is the topology diagram of the utility model embodiment push server connection.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Shown in reference picture 1- Fig. 8, a kind of intelligent access control system, including gate inhibition's main frame, terminal device, server, the door
Prohibiting main frame, to include access control mainboard and the electric control lock being connected respectively with access control mainboard, gate inhibition's communication module, gate inhibition defeated
Enter module, gate inhibition's voice module, the server includes sip proxy server, the sip proxy server include processor and
Coupled memory, SIP communication modules, PSTN communication modules, the terminal device include terminal control mainboard and and its
Connected terminal called module, terminal speech module, terminal input module, gate inhibition's main frame, terminal device pass through the door
Prohibit communication module, terminal called module is connected with SIP communication module data respectively, the PSTN communication modules and pstn telephone net
Connection, the SIP communication modules carry out data transfer with terminal called module, gate inhibition's communication module using voip technology respectively,
Authenticated and route by sip proxy server, terminal called module, gate inhibition's communication module are conversated using Session Initiation Protocol
Control, coding negotiation is carried out by SDP agreements, media transmission is carried out by Real-time Transport Protocol.
The sip proxy server can use application server, can be to intelligence as the hardware foundation of program operation processing
The terminal devices such as energy mobile phone carry out identification authentication, call routing, NAT and penetrated, and support agency, redirect, register positioning user
Etc. function, with the agreement such as SIP and RTP/RTCP, SDP, RTSP, DNS, can support and applied to voice, video, data etc.
Multimedia service, thus be responsible for instructing control and sequential operation with the multiple functions such as video, speech communication, processor, it will connect
In the respective data storage received to memory, the SIP communication modules are responsible for and gate inhibition's communication module of gate inhibition's main frame and end
The terminal called module of end equipment establishes data communication respectively, and the PSTN communication modules are responsible for not connecting in SIP communication modules
In the case of logical command terminal equipment, telephone number from PSTN to called resident family that bound by called,
Call and opening door operation；Gate inhibition's main frame main actions are initiation registration, invitation session etc.；Terminal device major function is to connect
By actions such as session request, the enablings of access control main frame.Here, by sip proxy server, smart mobile phone can be made using interconnection
The voice request and realize voice call that net reception gate inhibition's voice module transmits, have the characteristics of cost is cheap, easy to use, no
Resident family is needed specially to go to answer located at the indoor landline telephone for passing through wired connection with gate inhibition.Here, the server is to adopt
With the Cloud Server of x86 server constructions, gate inhibition's main frame is communicated by accessing internet with Cloud Server.
The terminal device can use the mobile communications tool such as smart mobile phone, tablet personal computer, with intelligence in the present embodiment
Mobile phone is easy to clearly introduce whole technical scheme as terminal device, control chip on circuit board and week in smart mobile phone
Side circuit collectively forms terminal control mainboard, and the touch screen of smart mobile phone is as terminal input module, on smart mobile phone circuit board
Communication antenna and circuit element collectively form terminal called module, the smart mobile phone hardware of the above is enough full as hardware foundation
Carry out receiving calling in sufficient the technical program and carry out the needs of speech talkback.
Gate inhibition's main frame also includes gate inhibition's photographing module for being connected with access control mainboard, the terminal device including with
The display screen of terminal control mainboard connected terminal display module, i.e. smart mobile phone.Gate inhibition's photographing module is set, language can carried out
While sound intercommunication, the video information of the visitor before gate inhibition's main frame is transmitted to the display screen of smart mobile phone by photographing module
It has been shown that, so as to have video intercommunication function.
The terminal device also includes the terminal photographing module being connected with terminal control mainboard, and terminal photographing module is intelligence
The camera of mobile phone, gate inhibition's main frame also include the gate inhibition's display module being connected with access control mainboard.So, in resident family's energy
While watching the video image of visitor, house also may be selected to provide certainly by gate inhibition's display module of gate inhibition's main frame to visitor
Oneself video image information, so as to realize two-way video intercommunication.
The server also includes Web server, push server, and gate inhibition's main frame, terminal device are assisted by HTTPs
View is connected with the Web server data, is connected by Transmission Control Protocol with the push server data.The Web server master
It is to provide http protocol transmission and accesses picture, house property information, enabling record information；The push server be primarily used into
Row property notice issues, device software version updating, and push does not wake up application function to APP online.
In order to preferably be dissolved into estate management, it is easy to infrastructure management company to go to manage whole cell or the personnel in some place
Disengaging, estate management machine is also included with safety, the intelligent access control system in support area, the estate management machine includes property
Management control mainboard and be connected respectively with estate management control mainboard estate management communication module, estate management input module,
Estate management display module, the estate management communication module are connected with the SIP communication modules data, with sip agent service
Device establishes data communication.After estate management machine communicates with server foundation, it is visual right to be carried out by sip proxy server
Say；The video data of correlation and data of taking pictures can be obtained by Web server, instruction can be pushed to by push server
Each user, user is set to obtain estate management information and notice in time.
The estate management input module includes character input unit and voice-input unit, in order to be able to passes through SIP
Proxy server and the terminal device of user, which are established, to be connected, and realizes voice call.
In the case of having lived in more people simultaneously in one set of room, terminal device is carried and gone out by a certain user sometimes, and indoor
The terminal device will not cause some to control the inconvenient of gate inhibition's main frame to some members, and intelligent access control system also includes interior
Machine, it is ad hoc in user room, used as a fixed terminal device, the indoor set include indoor control mainboard and
Indoor display module, indoor input module, the indoor communication module being connected respectively with indoor control mainboard, indoor communication module with
The SIP communication modules data connection of the sip proxy server.
It can be rapidly introduced into for the ease of user in door, gate inhibition's main frame also includes what is be connected with access control mainboard
Gate inhibition's radio frequency identification module, to read the RF tag of resident family, that is, the information of enabling magnetic card and enabling.
Shown in reference picture 5, for the purpose of utility model is better achieved, here, a kind of intelligent access control system is also provided
Application method, comprise the following steps：
S1. visitor inputs legal room number by gate inhibition's input module of gate inhibition's main frame and initiates calling, by access control master
Plate connects SIP communication modules by gate inhibition's communication module, by sip proxy server again to the terminal called module of terminal device
Calling is initiated, terminal called module is initiated by calling the tinkle of bells prompting by terminal control mainboard by terminal speech module.Here,
After the call signal that intelligent access control system cell phone application is received as smart mobile phone, cell phone application control smart mobile phone initiates ring
Prompting.
S2. within a certain period of time, such as in the Call Waiting time of 180 seconds, resident family passes through operation after hearing the tinkle of bells prompting
The terminal input module of terminal device receives calling, then is connected by sip proxy server between gate inhibition's main frame and terminal device
Data connect, and under gate inhibition's main frame and terminal device in sip proxy server by being connected, are conversated by Session Initiation Protocol
Control, Real-time Transport Protocol carry out media transmission, so as to realize voice, video intercommunication function.In Fig. 5,180,200 be in Session Initiation Protocol
The conditional code of specification, such as 180 represent phone ring, 200, which represent phone, is successfully established.
S3. resident family while terminating intercommunication, prompts after visitor's identity is confirmed by video and/or audio according to program
Whether open the door and operate, such as allow visitor to enter unit building, then dual-tone multifrequency (DTMF-Dual Tone are sent by terminal device
Multi Frequency) door open command, coding negotiation, access control main frame are carried out by SDP agreements through sip proxy server
Open the door.
When gate inhibition's main frame initiate calling and by SIP communication modules connect it is called not online when, the sip agent
Calling is gone to PSTN (PSTN-Public Switched by server by PSTN communication modules
Telephone Network), speech talkback is carried out by traditional liaison mode, after confirming visitor's identity by house, operation connects
The telephone plant listened sends dual-tone multifrequency (DTMF-Dual Tone Multi Frequency) by PSTN
To issue door open command, so as to effectively increase connected ratio.
The sip proxy server is during video and/or audio intercommunication, by processor by video and/or audio
Encryption is stored in memory, and the estate management machine can be consulted the information of storage according to authority.So, pacifying
During full problem, relevant information can be transferred by public security department, consequently facilitating post-mordem forensics are solved a case, further enhancing security.
In order to further realize that user is directly controlled the long-range of gate inhibition's main frame by terminal device, terminal in the present embodiment
The terminal control mainboard of equipment is sent by terminal called module includes the enabling request instruction of subscriber identity information to SIP generations
The SIP communication modules of server are managed, the processor of sip server receives this by SIP communication modules and contains subscriber identity information
Enabling request instruction, the processor of sip proxy server authenticates to the subscriber identity information, to be certified by rear, place
Device generation door open command is managed, and door open command is sent to corresponding gate inhibition's main frame, gate inhibition's main frame by SIP communication modules and received
To after the door open command, the access control mainboard of gate inhibition's main frame sends unlocking instruction control electric control lock and unlocked.In the present embodiment eventually
End equipment to the remote control of gate inhibition's main frame is realized via sip proxy server, and sip proxy server is believed the identity of user
Breath is examined, and therefore, before intelligent terminal realizes remote control, user needs to use intelligent terminal to carry out body on the server
Part information registering, so, when terminal device sends the enabling request instruction containing subscriber identity information, sip proxy server
The subscriber identity information is authenticated after ability, authentication further can be sent after by sip proxy server
Instruct and give gate inhibition's main frame, gate inhibition's host computer control electric control lock is opened the door, in fact, terminal device is to issue a command to sip agent service
Device, then sip proxy server by issuing a command to gate inhibition's main frame again after certification, in this way, all operation informations or operation refer to
Order is backed up on sip proxy server, has mark to look into, and ensures security control.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (8)
- A kind of 1. intelligent access control system, it is characterised in that including gate inhibition's main frame, terminal device, server, gate inhibition's main frame bag Include access control mainboard and the electric control lock being connected respectively with access control mainboard, gate inhibition's communication module, gate inhibition's input module, door Prohibit voice module, the server includes sip proxy server, and the sip proxy server includes processor and coupled Memory, SIP communication modules, PSTN communication modules, the terminal device includes terminal control mainboard and coupled end End communication module, terminal speech module, terminal input module, gate inhibition's main frame, terminal device communicate mould by the gate inhibition Block, terminal called module are connected with SIP communication module data respectively, and the PSTN communication modules are connected with pstn telephone net, institute State SIP communication modules and data transfer is carried out using voip technology with terminal called module, gate inhibition's communication module respectively, pass through SIP Proxy server is authenticated and route, and terminal called module, gate inhibition's communication module are conversated control using Session Initiation Protocol, are led to Cross SDP agreements and carry out coding negotiation, media transmission is carried out by Real-time Transport Protocol.
- 2. intelligent access control system according to claim 1, it is characterised in that gate inhibition's main frame also includes and access control The connected gate inhibition's photographing module of mainboard, the terminal device include the terminal display module being connected with terminal control mainboard.
- 3. intelligent access control system according to claim 2, it is characterised in that the terminal device also includes and terminal control The connected terminal photographing module of mainboard, gate inhibition's main frame also include the gate inhibition's display module being connected with access control mainboard.
- 4. according to the intelligent access control system described in claim 1,2 or 3, it is characterised in that the server also includes Web service Device, push server, gate inhibition's main frame, terminal device are connected with the Web server data by HTTPs agreements, passed through Transmission Control Protocol is connected with the push server data.
- 5. intelligent access control system according to claim 4, it is characterised in that the intelligent access control system also includes property pipe Reason machine, the estate management machine include estate management control mainboard and the estate management being connected respectively with estate management control mainboard Communication module, estate management input module, estate management display module, the estate management communication module communicate with the SIP Module data connects, and establishes data with server and communicates.
- 6. intelligent access control system according to claim 5, it is characterised in that the estate management input module includes character Input block and voice-input unit.
- 7. intelligent access control system according to claim 6, it is characterised in that the intelligent access control system also includes interior Machine, the indoor set include indoor control mainboard and the indoor display module being connected respectively with indoor control mainboard, indoor input Module, indoor communication module, indoor communication module are connected with the SIP communication module data of the sip proxy server.
- 8. intelligent access control system according to claim 7, it is characterised in that gate inhibition's main frame also includes and access control The connected gate inhibition's radio frequency identification module of mainboard.
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| CN201720008614.3U CN206672194U (en) | 2017-01-05 | 2017-01-05 | A kind of intelligent access control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910267A (en) * | 2017-01-05 | 2017-06-30 | 深圳市多度科技有限公司 | A kind of intelligent access control system and its application method |
| CN108171827A (en) * | 2017-12-12 | 2018-06-15 | 杭州电子科技大学 | A kind of College Dormitory intelligent door lock administration system based on MQTT agreements |
| JP2019193046A (en) * | 2018-04-23 | 2019-10-31 | 株式会社シーズンテック | Unlocking device, entrance facility, and intercom system |
| CN113554792A (en) * | 2020-04-26 | 2021-10-26 | 杭州银时科技有限公司 | Remote control access control machine based on wireless transmission technology |
-
2017
- 2017-01-05 CN CN201720008614.3U patent/CN206672194U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910267A (en) * | 2017-01-05 | 2017-06-30 | 深圳市多度科技有限公司 | A kind of intelligent access control system and its application method |
| CN108171827A (en) * | 2017-12-12 | 2018-06-15 | 杭州电子科技大学 | A kind of College Dormitory intelligent door lock administration system based on MQTT agreements |
| JP2019193046A (en) * | 2018-04-23 | 2019-10-31 | 株式会社シーズンテック | Unlocking device, entrance facility, and intercom system |
| CN113554792A (en) * | 2020-04-26 | 2021-10-26 | 杭州银时科技有限公司 | Remote control access control machine based on wireless transmission technology |
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