Security monitoring system is an independent and complete system that uses optical fiber, coaxial cable or microwave to transmit video signals in its closed loop, and from camera to image display and recording. It can reflect the monitored object in real time, vividly and truly. It not only greatly extends 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, so that people can see all the real situation of the monitored scene and record it through video. At the same time, the alarm system equipment will alarm illegal intrusion, the alarm signal will be input to the alarm host, and the alarm host will trigger the monitoring system for recording and recording.

1. Check the installation of monitoring system correctly
The purpose of installing the monitoring system is not to infringe upon the privacy of others. There is no need to think that installing monitoring means distrusting others. On the contrary, monitoring is only aimed at bad people, not gentlemen. The purpose of installing monitoring is to protect our property and create a safe environment for everyone. The installation of monitoring can not be said to be due to the decline of social trust, but to the progress of social civilization. We pay more attention to safety and use science and technology to create a better and safer living environment.

2. Monitoring function features
Monitoring system is playing a more and more important role in production and life. Banks, supermarkets, shopping centers, residential areas, Internet cafes, public transportation and other public places need to be monitored, which greatly improves family safety. The functions and characteristics of monitoring are as follows: early warning; The current monitoring has detection and alarm functions, which can prevent suspicious personnel or events; Real time display; At any time, you can pay attention in real time to keep your information from falling behind; After tracking: the video playback function allows you to track missed events, and video files are also important for processing, now backup.

The monitoring system can effectively monitor the working environment and production order at the production site, reduce uncivilized behavior and do a good job in anti-theft.

3. What equipment does the monitoring system consist of?
The mainstream monitoring system of weak current engineering construction company is mainly composed of four parts: camera equipment, control equipment, transmission equipment and display equipment.
Camera equipment: mainly refers to camera and pickup

The camera is responsible for video and needs the cooperation of power supply and support.

The pickup is responsible for audio and requires power supply, which is rarely used in civil monitoring.
Control equipment: video capture card or hard disk recorder.

① The video capture card needs to use a computer. It can only work when the computer is turned on. Video files are stored on the computer hard disk for easy reading. The acquisition card is equipped with software to control on the computer and can not record video all day.

② Hard disk video recorder can be used for 7 * 24-hour video recording. It does not contain a hard disk. You can purchase hard drives as needed. It has powerful and stable standby video recording function.
Transmission equipment: video cable, power cable, video power cable.

Video cable is mainly used to connect camera and control equipment to realize video signal transmission.

There is a certain distance between the power line and the household red and black line, and between the camera and the power supply, so you need to use the power line to mainly transmit current.
The video power integrated cable can be used in places with long distance and inconvenient wiring. Video and power do not need to be wired separately.

To install security monitoring equipment, first select the monitoring host. Is it better to install the monitoring card on the computer, or is it better to use the embedded hard disk recorder as the monitoring host? The computer monitoring card is more suitable for professional duty personnel who are familiar with computer installation. It has more functional requirements and its overall investment is relatively low. Since the monitoring card is installed on the computer, it needs to be turned on 24 hours a day; For the latter, there is no need for professional knowledge and duty, and the operation is relatively simple.

Several cameras shall be installed for the installation of security monitoring equipment, which will affect the quality and monitoring range of cameras. One option is to determine the number of cameras used for surveillance, and then determine the lens range of surveillance cameras according to the number of cameras. Therefore, the distance from the camera to the monitoring point and monitoring area must be clear. The 480 TV line camera is recommended for infrared power supply network because it is more in line with that definition.

For the installation of security monitoring equipment, the third part is to consider whether the camera has night vision function. If the monitoring is installed in a dark place, it is necessary to consider using infrared night vision camera.

Wired or wireless transmission mode can be selected for the installation of security monitoring equipment. Although the cost of wireless network is relatively high, it can save a lot of installation trouble and make the monitoring site more beautiful. However, the installation of wireless network monitoring equipment should consider the environmental problems of safe places. Cement building materials will shorten the wireless transmission distance, and metal building materials may cover wireless signals. Infrared transmitter and infrared receiver shall be far away from other electrical appliances to avoid interference. Since the price of wireless network is almost twice that of wired transmission monitoring equipment, I suggest using wired transmission installation.

Site monitoring and network monitoring should consider whether network functions are required when determining the installation of monitoring system. In other words, if you need to monitor the monitoring site on the Internet at any time, you need to select a monitoring host with network function. Avoid network transmission after installation.