In order to make smart buildings better serve the public, in light of the requirements of intercom access control systems and indoor security systems, a simple integrated design idea for intercom access control and indoor security systems is proposed; in addition, intercom access control systems for buildings And a brief introduction to the indoor security system.
1 Introduction
Smart buildings cover the most advanced technologies in network communication, building electrical control, etc. Coordination work in communication, power control, security, fire protection, video surveillance, etc. in smart buildings can realize communication automation, power control automation, and security in smart buildings Protection automation and office automation. Smart buildings are still emerging in China. To manage smart buildings with cost savings and to serve the public well, it is necessary to design smart intercom access control systems and indoor security systems.
2 Smart floor intercom access control system requirements
The intelligent building intercom access control system refers to a large interconnected system formed by connecting the entrance of the building, the residents in the building and the building property management department through computer technology, communication technology, and video display technology. The functions generally required to achieve are as follows :
(1) Smart door opening function: residents in this building can open the door by means of the door key, smart IC card or door opening code assigned by the building property management department, and can freely enter and enter the building:
(2) Visitor identification function: When a "guest" of a resident of this building comes to visit, the "guest" can directly dial the room of the visited resident by pressing the house number assigned to the visited resident on the keyboard of the intercom host outside the building Extension of the intercom, after connecting, the "guest" can have a common voice conversation or video conversation with the host of the visited household. When the owner of the residence confirms the identity of the "guest" through the dialogue or video, if the host allows the "guest" "Enter, press the unlock button on the intercom extension to open the electric door lock on the entrance door of the building, and visit the" guest "to enter the building;
(3) Real-time monitoring function: the property management department of the building can manage the host through the intercom of the community, and can monitor the real-time situation of the intercom access control system of each building in the community. Assuming that the entrance door of a building is forced to open or a fault occurs somewhere in the intercom access control system, the building intercom management host will immediately issue an alarm signal and simultaneously display the content of the alarm and the building number and room number of the alarm, property management After the department obtains the information, it can promptly deal with the police. The main equipment required for designing the building intercom access control system are doorbell, network device, electronic door lock, user extension, door host, intercom management center host and other related equipment.
3 Indoor security system requirements
The previous indoor security control systems generally only have monitoring subsystems such as fire monitoring, anti-theft monitoring, and combustible gas leakage monitoring. The protection functions are not perfect, the false alarm rate of the alarm is relatively high, and often due to technical reasons for the signal transmission system Real-time remote alarm is achieved, and the best prevention effect cannot be achieved. The current indoor security system is a combination of communication and network technology, sensor technology, automatic control technology and other technologies, using intelligent signal transmission technology to control indoor appliances, indoor environment control, indoor: condition frequency monitoring, indoor information exchange, indoor An intelligent system composed of security precautions, building management and service integration. The indoor security system generally requires the following functions:
(1) Emergency help function; the emergency help button has the function of emergency help. It is generally installed on the bedside of the resident's bedroom or other easily accessible places. After pressing the button, the building management center will immediately receive the help information, and immediately respond to Resident's emergency help signal to respond and help: In addition, if you encounter fire, disease and other abnormal conditions, you can press the emergency help button;
(2) Real-time alarm and rescue function: It can prevent illegal intrusion by installing various detectors. When there is an intrusion signal, it can automatically turn on the indoor alarm and send out alarm information to the host of the building management center at the same time, and the building police get the signal After the alarm can be quickly processed:
(3) Alarm management display function; when the residents leave the residence, if the fortification enters the anti-theft alarm state, when the illegal intrusion occurs, the management system of the building management center can receive the alarm information in real time and automatically display the question mark of the room that is currently illegally invaded And alarm types, and automatically archive real-time information:
(4) Preset alarm function: The indoor security system of the intelligent building can also preset multiple alarm phones, and it can be connected to the computer of the alarm management center through a specific communication format to realize the automatic dialing of the corresponding alarm phone: In addition, the residents can also use the advance Set the alarm message to a mobile phone set by the tenant;
(5) Real-time response control of arming and disarming: if the household owner starts the indoor security protection system when going out, the system can make certain indoor household appliances stop working in real time: when the owner returns home, the security protection system can be manually adjusted to normal In the protection state, enter the home disarming mode. At this time, some lights can be turned on automatically, and the door magnet and window magnet are offline, but the indoor combustible gas detector and smoke detector are still in the alarm mode.
4 Description of main equipment required by the system
The main equipment required for the system is as follows:
(1) Inter-layer distributor: The inter-layer distributor is used on each floor to play the role of system decoding and system isolation to ensure the normal operation of the system. Each floor distributor can connect 2-3 households. The floor distributor is installed on the wall of the weak current shaft of each floor. The installation height is generally 1.4-1.5 meters from the ground:
(2) Management center host: The management center host can be connected to multiple unit door machines, generally using bus wiring, can call each resident indoor extension, each unit door host and other management machines, can receive resident emergency alarms, and display alarm conditions Type and household number can be connected to a computer to realize intelligent building management;
(3) Multi-function indoor extension: The multi-function indoor extension mainly controls the withdrawal and arming of the detector, completes the work arrangement of the alarm detector, and transmits the real-time alarm situation to the host of the management center:
(4) Network device: The network device is used to control and protect the data transmission between the host of the management center and the outdoor host, indoor extension, and multi-functional indoor extension. In addition, it can also link the next layer of the device of the host effect;
(5) Detector: The detector is the "perception organ" of the security system, and its role is to monitor the presence of intrusive signals in the building environment. Once there is a violation signal, the characteristic physical quantity of the violation signal is converted into an electrical signal, and then the converted electrical signal is transmitted to the control center. Commonly used detectors in buildings include infrared detectors, combustible gas detectors, smoke detectors, etc .;
(6) Signal transmission system: The signal transmission system refers to the transmission line from the detector to the alarm center, including wired transmission and wireless transmission.
5 Overall system design ideas
The functions required after the system design is completed are as follows:
(1) When a help signal or any infringement signal is input to the multi-function indoor extension, the sound and light alarm can be driven through the multi-function indoor extension to report to the host of the management center;
(2) When someone presses the doorbell, the ordinary conversation or video conversation can be realized through the multifunctional indoor extension;
(3) Multi-functional indoor extensions can communicate with ordinary indoor functions:
(4) Press the outdoor host key correctly to communicate with the management center, multi-functional indoor extension and ordinary indoor unit;
(5) All information changes can be transferred to the computer for management through the communication conversion module.
6 Wiring and installation problems
(1) Try to use terminal transition wiring for wiring. Do not directly connect at a breakpoint. If a breakpoint connection is necessary, tin plating is required at the breakpoint:
(2) The doorbell and outdoor host should be installed on the door leaf that is not normally open or embedded in the wall as far as possible to prevent the circuit from being clipped or severely worn when the door leaf is opened and closed, resulting in the system being open or short-circuited;
(3) At the time of installation, pay attention to the waterproof work of outdoor equipment to prevent rainwater from flowing into the equipment and causing a short circuit:
(4) It must be noted that the signal common end of the front-end equipment and the controller and the ground must be connected together;
(5) The host of the intercom management center of the intelligent building should be set as far as possible in the security guard duty room of the property management department, so that the staff on duty can react and handle in a timely manner when an alarm situation occurs or the lower equipment fails;
(6) The video signal line uses coaxial cable g
(7) Signal lines are laid separately from strong current lines to prevent interference.
7 Use caution
(1) After the multi-functional indoor extension enters the armed state, please leave all the anti-theft areas as soon as possible within the specified time, and close the doors and windows, otherwise the alarm may be triggered after the preset time;
(2) The user should keep in mind the disarming password of this extension for use when disarming;
(3) If there are multiple outdoor hosts in the same unit, only one of the outdoor hosts needs to be set with a user password.
8 Conclusion
The building intercom access control and indoor security system designed according to the above method can well prevent external intrusion, and can be uploaded to the main control room in time if danger is encountered. At present, this solution has been applied to Tianhuang THBAS-3 building intelligent engineering training device, and the overall operation is good.
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