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Fore-end of lifting security monitoring

Time:2021-06-21 View:

Security monitoring system uses optical fiber, coaxial cable or microwave to transmit video signals in its closed loop, and forms an independent and complete system from camera shooting to image display and recording. It can reflect the monitored objects in real time, vividly and truly, which not only greatly prolongs the observation distance of human eyes, but also expands the function of human eyes, it can replace manual monitoring for a long time in harsh environment, allowing people to see all the actual situations on the monitored site and record them through video recorder. At the same time, the alarm system equipment alarms illegal intrusion, and the generated alarm signal is input to the alarm host, which triggers the video recording of the monitoring system and records it.
 
Fore-end
The front end completes the functions of shooting analog video, generating alarm signals of detectors, controlling PTZ and shield, alarm output, etc. Mainly includes: Camera, electric zoom lens, outdoor infrared detector, double monitor detector, temperature and humidity sensor, PTZ, shield, decoder, bsvlcd combined screen, digital scanner, alarm light, siren and other equipment (the equipment usage is configured according to the actual needs of users). The camera captures the scene situation into analog video electrical signals through built-in CCD and auxiliary circuits and transmits them through coaxial cables. The electric zoom lens draws the shooting scene closer and farther, and realizes optical adjustments such as aperture and focusing. Temperature and humidity sensors can detect the temperature and humidity in the environment, thus ensuring a good internal physical environment. PTZ and shield provide a suitable working environment for cameras and lenses, and can realize horizontal and vertical adjustment of shooting angle. Decoder is the core equipment of PTZ and lens control, through which microcomputer interface can be used to control lens and PTZ through software.
Transmission part
The transmission part introduced here is mainly composed of coaxial cable. The transmission part requires real-time transmission of the images recorded by the front-end camera. At the same time, the transmission requires low loss and reliable transmission quality, and the images can be clearly restored and displayed in the video control center.
Control Section
This part is the core of the security monitoring system, which completes the functions of digital acquisition, MPEG-1 compression, monitoring data recording and retrieval, hard disk video recording, etc. Its core unit is the collection and compression unit. Its Channel reliability, computing and processing capabilities, and the convenience of video retrieval directly affect the performance of the whole system. The control part is the key part to realize the linkage between alarm and video recording.
TV Wall Display part
This part completes the real-time monitoring signal display and video content playback and Retrieval on the system display or monitor screen. The system supports multi-picture playback, simultaneous recording of all channels, system alarm screen, sound prompt and other functions. It is not only compatible with the monitoring function of the traditional TV monitoring Wall, but also greatly reduces the working intensity of the personnel on duty and improves the reliability of security and defense. The terminal display part actually completes another important work-control. This control includes camera cradle head, lens control, alarm control, alarm notification, automatic, manual fortification, anti-theft lighting control and other functions. Users only need to click the mouse on the desktop of the system to operate their work.
Anti-theft alarm part
Install active infrared probe at important entrances and exits and stairs for defense, and install alarm host in the duty room (monitoring room) of monitoring center. Once someone enters somewhere, the probe will automatically sense and trigger alarm, the host displays the alarm parts, and at the same time interacts with the corresponding searchlights and cameras, and automatically switches to alarm camera images on the host. The alarm center monitors the electronic map with a computer and records the alarm, prompt the personnel on duty to handle, greatly strengthening the security. The alarm prevention system uses active mobile infrared detector to control important channels and connect them to the alarm center of the management center. When personnel enter through abnormal entrances during non-working hours, the detector will immediately send the alarm signal to the management center, and start the linkage device and equipment at the same time to warn the intruders, which can be used for continuous camera shooting and video recording. Electronic fence is installed on the periphery of the building. Electronic fence is the most advanced perimeter anti-theft alarm system at present, which consists of high-voltage electronic pulse host and front-end detection fence. The high-voltage electronic pulse host generates and receives high-voltage pulse signals, generates alarm signals when the front-end detection fence is in the state of net contact, short circuit and open circuit, and sends intrusion signals to the security alarm center; the front-end detection fence is a tangible perimeter composed of rods, metal wires and other components. Electronic fence is an active intrusion prevention fence, which counterattacks invasion attempts, repels intruders, delays invasion time, and does not threaten people's lives, and send intrusion signals to security department monitoring equipment, In order to ensure that the management personnel can know the situation of the alarm area in time and handle it quickly.
System power supply
The supply of power supply plays a vital role in ensuring the normal operation of the whole closed-circuit monitoring and alarm system. Once the power supply is damaged, the whole system will be paralyzed. The power supply of the system can adopt two parts: centralized power supply and decentralized power supply, and users can choose according to actual needs.
The above is only a typical security monitoring system introduction. In practical applications, different types of solutions appear. Security monitoring system solutions are generally made-to-measure according to different requirements of users.
Power line surveillance camera
The surveillance camera based on power line transmission is a technology that transmits the surveillance images taken by the camera to the monitoring center through ordinary alternating current. This technology will greatly reduce the construction and operation costs of the users. The power line transmission camera has only one lead-out line, which is the power cord. This power cord not only provides power to the camera, but also provides transmission of video signals, audio signals and control signals, the transmission distance can reach more than 1000 meters and can reach repeater relay. We can use the existing power line indoor to build a video surveillance network, which has the advantages of no need to lay cables and convenient maintenance. It is plug-and-play, efficient, stable, environmentally friendly and convenient, allow any camera to be monitored in places with sockets. It avoids the engineering construction necessary for laying a large number of cables and is plug-and-play. It is a wired monitoring method without wiring, which does not affect the internal decoration and is very simple to maintain and upgrade in the future. In addition, making full use of the existing power line network in the room to allow wires to transmit data while transmitting power is a wired monitoring method without additional wiring. No matter where the office is, you can monitor any camera and monitor it anytime and anywhere, which greatly saves the wiring cost of building and expanding the network and avoids damage to the existing building layout.