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The design of the perimeter anti-crossover alarm system in the community adopts the perimeter anti-overpass active infrared cross-fire alarm system to actively detect, locate and alarm the illegal intruders in the surroundings, to tell the security personnel which pair of shooting areas have occurred, and to prompt the security personnel to deal with . The community adopts the method of combining infrared cameras and infrared radiography on the surrounding wall for arming. Combined with the on-site situation and Party A's suggestion, the number of shots reached 50 pairs, and the status of each alarm point will be displayed on the digital map. At the same time, the surveillance camera can be pointed at the problem location to view.
2. CCTV monitoring The main channels of the CCTV monitoring system and the multiplexed method of CCTV monitoring in the area are used to alarm the linkage when the situation occurs. An outdoor color three-variable camera is used, and cameras with different illuminances are used. Infrared night vision cameras need to be installed in different parts. . The design system adopts the hard disk video recording system of alarm linkage recording as the alarm image storage, and the large-scale video matrix as the central control system.
3. Intercom and card (including family anti-theft)
Mainly for the effective management and control of the flow of visitors in residential areas, residential buildings and households, by setting up the management center machine and the door machine of the residential building to form peripheral visiting equipment, the design of the indoor unit of the household uses the household extension with network function In this way, the functions of the system can be completed and expanded, and the needs of different households can be met and the investment increased for the establishment of different system functions can be saved. In addition to the video intercom function, this extension system can also call the property management center. The functions that can be achieved in the intercom section are: building video intercom, smart home security, community announcements, photo message, home appliance control, lighting control, three-table query, community service, home assistant, etc. Full Chinese interface, graphic display, touch screen operation lock control, monitoring, He Xuan ringing, doorbell, call gate, call center, emergency help, wired and wireless zone alarm, MMS sending and receiving, call transfer, care function, mute do not disturb , Support touch screen operation. The card part mainly considers practicality, durability and user convenience.
The front-end part completes the shooting of analog video, the generation of detector alarm signals, the control of the gimbal and protective cover, and the alarm output. It mainly includes camera, electric zoom lens, outdoor infrared radiation detector, dual monitor detector, temperature and humidity sensor, gimbal, protective cover, decoder and other equipment (the use of equipment is configured according to the actual needs of users). The camera uses the built-in CCD and auxiliary circuit to shoot the scene as an analog video electrical signal, which is transmitted via the coaxial cable. The electric zoom lens zooms in and out the shooting scene, and realizes optical adjustments such as aperture and focus adjustment. The temperature and humidity sensors can detect the ambient temperature and humidity, thereby controlling the temperature and humidity in the protective cover to suit the working environment of the camera. The gimbal can realize the horizontal and vertical adjustment of the shooting angle. The decoder is the core device for PTZ and lens control. Through it, the lens and PTZ can be controlled by software using a microcomputer interface.
Transmission section The transmission section described here is mainly composed of coaxial cables. The transmission part requires real-time transmission of the images recorded by the front-end camera, and the transmission requires low loss and reliable transmission quality. The images can be clearly restored and displayed in the video control center.
Control part This part is the core of the security monitoring system. It completes the functions of digital acquisition of analog video surveillance signals, MPEG-1 compression, monitoring data recording and retrieval, and hard disk recording. Its core unit is the acquisition and compression unit. Its channel reliability, arithmetic processing capability, and the convenience of video retrieval directly affect the performance of the entire system. The control part is the key part to realize the linkage of alarm and video recording.
This part of the TV wall completes the real-time monitoring signal display and playback and retrieval of video content on the system display or monitor screen. The system supports multi-picture playback, simultaneous recording of all channels, system alarm screen, voice prompts and other functions. It is compatible with the unobstructed monitoring function of the traditional TV monitoring wall, but also greatly reduces the work intensity of duty personnel and improves the reliability of security defense. The display part of the terminal actually completed another important work-control. This control includes camera pan/tilt, lens control, alarm control, alarm notification, automatic, manual arming, anti-theft lighting control and other functions. The user's work only needs to click the mouse on the system desktop.
Anti-theft alarms are equipped with active infrared probes at important entrances and stairways in the inner periphery for arming, and an alarm host is installed in the duty room (monitoring room) of the monitoring center. Once someone enters somewhere, the probe will automatically sense and trigger the alarm. The host The alarm location is displayed, and the corresponding searchlight and camera are linked at the same time, and it is automatically switched to the alarm camera screen on the host computer. The alarm center monitoring computer pops up an electronic map and makes an alarm record, prompting the staff on duty to deal with it, which greatly strengthens the security. The alarm prevention system uses active infrared motion detectors to control important channels and connects to the alarm center of the management center. When someone enters from an abnormal entrance during non-working hours, the detector will immediately send an alarm signal to the management The center simultaneously activates linkage devices and equipment to warn the intruder, and can perform continuous video and video recording.
An electronic fence is installed on the periphery. The electronic fence is an advanced perimeter anti-theft alarm system. It consists of a high-voltage electronic pulse host and a front-end detection fence. The high-voltage electronic pulse host generates and receives high-voltage pulse signals, and can generate an alarm signal when the front-end detection fence is in the state of net contact, short circuit, or open circuit, and sends the intrusion signal to the security alarm center; the front-end detection fence is composed of rods and metal wires, etc. The tangible perimeter composed of components. Electronic fence is an active intrusion prevention fence, counterattack intrusion attempts, repel intruders, delay intrusion time, and do not threaten human life, and send the intrusion signal to the security department monitoring equipment to ensure management personnel Can timely understand the situation of the alarm area and quickly deal with it.
The supply of system power supply plays a vital role in ensuring the normal operation of the entire closed-circuit monitoring and alarm system. Once the power supply is damaged, it will cause the entire system to be in a paralyzed state. The power supply of the system can be divided into two parts: centralized power supply and decentralized power supply, and users can choose according to actual needs.