Weak current security monitoring and management system installation technology

With the development of society, the expansion of cities, the construction of transportation systems, and the construction of new types of buildings, the application of security monitoring systems has received more and more attention. After many things happen, it is always necessary to explain the problems through monitoring records. It can also often shock criminals to eliminate crimes from germination.

Weak current security monitoring and management system installation technology

Therefore, the necessity of the security monitoring system in our daily life becomes more prominent, and the reasonable and reliable installation of the material and equipment of the security monitoring system has become the primary condition for ensuring the normal function of the system function.

First, the technical requirements of wiring

The security monitoring system wiring not only meets the requirements of relevant data indicators, but also has a reasonable layout, safety, reliability, and firmness and neatness when wiring. Its technical requirements are as follows:

1. The rated voltage of the conductor should be greater than the working voltage of the circuit. The insulation of the conductor should meet the installation method of the circuit and the environmental conditions for laying. The cross-sectional area of ​​the conductor should be able to meet the requirements of power supply and mechanical strength.

2, the wiring should try to avoid the wire connector. Unless joints are used, their joints must be crimped or welded. Wire connections and branches should not be subjected to mechanical forces. The wire that is put in the tube cannot be connected under any circumstances. If necessary, connect the connector to the terminal in the terminal box.

3, the installation of wiring in the building to maintain horizontal or vertical. Wiring should be protected by casing (PVC pipe or galvanized steel pipe, according to the technical requirements of the indoor piping), and the ceiling wiring can be made of metal hose, which must be fixed securely and beautifully.

4, the signal line can not be parallel with the power line, but can not wear in the same tube. If you are limited due to the environment, you must run parallel and keep the distance between the two lines more than 50cm.

5. The AC power supply of the alarm control box shall be routed separately. It shall not be in the same pipe as the signal line and the low voltage DC power cable. The installation of the AC power cable shall comply with the electrical installation standards.

6, the alarm control box to the ceiling of the alignment, the need to add casing embedded in the wall or with galvanized steel pipe to protect, in order to improve the system's resistance to damage.

Second, the technical requirements of piping

1. There are two types of wiring harnesses, clear and concealed: clear plumbing requires horizontal and vertical, neat and beautiful appearance; dark piping requires short piping, smooth flow, and small elbows.

2, according to the design of the choice of pipe types and specifications, if no specific requirements, according to the total area of ​​the wire through the line pipe (with skin), no more than 70% of the pipe cross-sectional area of ​​the hole to carry out matching.

3. In order to facilitate pipe threading and maintenance, when the length of the pipe exceeds the following values, a junction box or cable box shall be installed in the middle, and the position shall be convenient for threading:

a. When the length of the pipe exceeds 40 meters, when there is no bending; b. When each length exceeds 25 meters, there is a bend; c. When each length exceeds 15 meters, there are two bends; d, Each length exceeds 10 meters, there are three bends Time.

4. Line tube fixing: The line tube should be fixed at every corner or straight line distance every 1.5 meters.

5, the bending radius of the cable conduit should meet the requirements of the bending radius of the cable to be penetrated (the cable has different requirements for different properties and types). 6. The pipe used is free of trachoma, cracks and large deformation and the inner wall of the pipe is smooth without burrs to avoid cable damage.

6. The connection of the line pipe is crimped or top-connected.

7. For the vertically laid line pipe, insert a fixed threaded junction box (pulling box) at intervals of 10 meters according to the size of the section through the conductor, and fix the wire in the box with an insulated clamp. The thicker the wire, the shorter the distance between the fixing points.

8, in the box (box) does not enter the vertical nozzle, after piercing the wire, the nozzle should be sealed.

9. The connection box or cable box shall be fixed with no less than three screws. The terminal box or cable box shall be covered and closed. The junction box of the line pipe shall be provided with a distribution box to facilitate inspection and operation.

Third, based on network transmission monitoring system installation technology focus

Today's surveillance systems have achieved great development due to the in-depth application of network technology. Based on the monitoring system of corporate LAN, remote Internet, wireless network, and satellite transmission technology, humans have truly clever eyes and ears. The technical feasibility, safety and reliability of the network as the transmission medium are the basis for the normal operation of the monitoring and management system. The installation of a proper basic transmission network is a necessary condition for the realization of the system function.

1, remote network monitoring system structure

Monitoring the application from point-to-point to the system audio and video matrix, and then to the LAN and then the wide area network, the monitoring system overcomes the technical difficulties of each development link, and these links (as shown in the above figure) are the key to ensure the system function is achieved:

a. Ensure that the site monitoring equipment material is installed accurately and the network camera address is set accurately

b. The monitoring system cable laying is accurate and the protection is perfect. (In the case of elevator monitoring and installation, the accompanying cable of the elevator must pay particular attention to the following requirements: the bundles shall be well fixed and fastened, and sufficient length shall be reserved for each corner and moving part).

c. The power supply of field equipment, control box and equipment room is accurate and stable. If conditions are available, two-way power supply should be set up.

d, monitoring equipment box, monitoring equipment room installation and commissioning

e, monitoring host through the switch, router and communication network connection is completed debugging

f. The completion of AP commissioning using wireless communication forms a perfect wireless communication network

g, for unattended remote monitoring signal acquisition, should adopt dynamic IP binding technology, reduce costs, through the ADSLMODEM virtual dial-up Internet access, network bandwidth should be guaranteed to be more than 512k.

2, remote network monitoring system installation

1 The role of the monitoring system equipment in connecting each equipment is as follows:

a. ADSLMODEM connects the LAN to the Internet through a telephone line. b. The broadband router performs virtual dialing on the ADSL MODEM to obtain a public network address. It maps some ports of the LAN to the network cameras or other PC ports that provide services. c. The switch connects LAN terminals (PCs, network cameras, etc.) and server groups to a LAN. d. When the hub is connected to the network camera and the switch (super-five twisted pairs), it plays a role in strengthening the signal.

2 Monitoring System Operation and Management

The internal computer and remote computer users in the enterprise LAN can be monitored by the administrator's authorization to monitor the situation on the site through the monitoring system client software or IE browser. The user can freely control the camera zoom and pan-tilt rotation through the network, perform dynamic alarm setting and real-time recording on the scene of any monitoring point, and check the existing recording information on the server at any time. The weak current security monitoring and management system shall implement a user-level management system. Different levels of users shall assign different operating rights to reduce losses caused by unauthorized operations and misoperations and ensure system security.

Example: Installation of Safety Monitoring Network Cameras on Construction Sites

Precautions:

a. The camera connects to a network cable and a power cable. The network cable connects to the office LAN switch. When the distance from the camera to the switch exceeds the transmission distance of the network cable, a hub must be installed in the middle.

b. If it is difficult to install the network cable between the installation position and the switch, you can consider using wireless transmission. After installing a wireless AP on the camera and the switch, you can connect to the LAN to achieve data communication, but the cost is relatively high. .

c. Ensure the power supply voltage is stable and reliable according to the requirements of the camera index. Usually AC 220V power transmission is relatively long, and the use of a relatively large area of ​​the wire diameter is relatively small, resulting in a smaller power supply voltage drop.

Conclusion:

Weak current security monitoring system is now not only a monitoring video system in a narrow sense. With the development of weak current integration technology and changes in people's safety awareness, the linkage between intrusion prevention systems and fire alarm systems and security monitoring systems has become a basic requirement for security work. New awareness of new technologies and new requirements will surely bring us a brand new weak security intelligent security monitoring system.