Video networked alarm system services

Nowadays, more and more occasions require the use of networked alarm systems. However, many friends still do not understand what the networked alarm system is used for and how to implement networked alarms. Here is a brief introduction. I hope it will be helpful to my friends. Help
1. Composition A networked alarm system usually consists of front-end equipment (including detectors and emergency alarm devices), transmission equipment, processing, control, management equipment and display and recording equipment.
The front-end detection part is composed of various detectors. It is the tactile part of the networked alarm system, which is equivalent to human facial features and skin. It can sense changes in various physical quantities such as temperature, humidity, odor, energy, etc. on site, and will It is converted into a signal suitable for transmission according to certain rules. The operation control part is mainly the alarm controller.
The alarm receiving center is responsible for receiving and processing alarm information and status information from each subsystem, and sending the processed alarm information and monitoring instructions to the alarm receiving center and related subsystems respectively.
2. Classification According to different signal transmission methods, the network alarm system construction mode is divided into the following types
Split-line detectors and alarm devices use a one-to-one dedicated line between the multi-core cable and the alarm host. connected.
Bus-based detectors and alarm devices are connected to the alarm host through corresponding addressing modules using an alarm bus (dedicated line).
Wireless detectors and alarm devices communicate with the alarm host through corresponding wireless equipment. The number of emergency alarm devices in one defense zone must not be larger than one.
Public network detectors and alarm devices are connected to the alarm host through on-site alarm equipment and/or network transmission equipment using a public network. The public network can be a wired network or a wired-wireless-wired network.
3. Function The networked alarm system means that when an illegal intrusion into the prevention area occurs, the device that causes the alarm senses a dangerous situation signal. The intrusion alarm system uses detectors to arm important locations and areas inside and outside the building. It can detect illegal intrusion in a timely manner and promptly alert relevant personnel when an illegal intrusion is detected. For example, door magnetic switches and glass break alarms can effectively detect external intruders, and infrared detectors can sense people's activities in the building. Once an intrusion occurs, the time and location of the intrusion can be recorded in a timely manner, and an alarm signal can be sent out through the alarm device.
4. Development
The first generation of intrusion alarms is a switch-type alarm, which prevents break-ins and theft. This kind of alarm is installed on doors and windows.
The second generation of intrusion alarms are glass break alarms and vibration alarms installed indoors.
The third generation of intrusion alarms are space movement alarms (such as ultrasonic, microwave, passive infrared alarms, etc.). The characteristic of this type of alarm is that as long as someone moves in the space being guarded, an alarm will be triggered. These intrusion alarm systems have experienced rapid development in alarm detectors.