Wireless camera application

It is well known that a large variety of wires need to be laid out in a monitoring system. On the one hand, it consumes a lot of manpower, on the other hand it also consumes a lot of copper and plastic. It’s really a waste of labor, a waste of resources, and a violation of the concept of environmental protection. People are looking forward to a more convenient way of transmitting audio and video. With the maturity of video compression technology and wireless network technology, wireless cameras have emerged as the times require, and are striding into the market.

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A wireless camera is a new type of surveillance camera that embeds a wireless receiver into a network camera. It uses WIFI channels and is compliant with the IEEE 802.11B/G standard protocol. WIFI is a wireless network composed of AP "Access Point" and wireless network card. AP is generally called a network bridge or access point. It is used as a bridge between a traditional wired local area network and a wireless local area network. Therefore, any PC with a wireless network card can share the wired local area network through the AP. Even the resources of a wide area network work as a HUB or a router with a built-in wireless transmitter, while a wireless network card is a CLIENT device that receives signals transmitted by the AP. With an AP, like a switch or router in a typical wired network, a wireless workstation can be quickly and easily connected to the network.

In short, when one end of the switch is connected to a wireless AP or a wireless router, one or more wireless cameras are installed within the coverage of the wireless AP/wireless router signal to form a simple wireless video surveillance system, and audio and video. Display and management is implemented by computers in the LAN (in the wireless network or access switches), and the PTZ control signals are also transmitted over the air. If the wireless AP or the route is connected to the Internet, and the dynamic domain name resolution and port mapping of the wireless camera is performed, the remote audio and video monitoring can be realized.

The strength of the wireless signal depends on the power level and transmission capability of the wireless AP/router, and is not necessarily related to the wireless camera. Therefore, the wireless camera monitoring system often considers the on-site environment to decide how much wireless AP to use, whether to add a wireless antenna, and whether to bridge the AP to increase the signal. Even in a more complex environment, as long as these measures are taken, a stable wireless LAN can always be made. In this wireless LAN, people can freely install wireless cameras. And in the wireless LAN, we do not have to worry about the network speed is not enough, because the bandwidth of the wireless LAN is at least 11M, easily reach 54M, the next generation WIFI can reach 540M.

Some people are worried about wireless radiation, which is not necessary. The transmission power specified by IEEE802.11 cannot exceed 100 mW, and the actual transmit power is about 60~70 mW. What kind of concept is this? The mobile phone's transmitting power is about 200 milliwatts to 1 watt, and the handheld walkie-talkie is up to 5 watts. The wireless network is not used directly like a mobile phone. It is absolutely safe.

In short, the wireless camera is a very convenient and environmentally friendly high-tech product, and sometimes it can save costs. At the same time, the freedom and mobility of the wireless camera can not be ignored. It is valuable to carry out remote management of liquidity on the production floor. Wireless cameras, like other network cameras, have a rich look and function. At present, well-known brand companies such as Hikvision, D-LINK, and Tianshida have successively launched wireless home cameras, wireless domes, and wireless domes, and have accumulated rich wireless LAN components and wireless video solutions. At present, Tianshida's wireless camera has been successfully applied to homes, schools, hotels, construction sites and mines, which proves that the current wireless camera technology is very mature.

With the use of wireless cameras, the monitoring system removes the cumbersome and heavy wiring, making it extremely flexible and lightweight. Wireless cameras will surely become the protagonists in the surveillance field, leading the surveillance market to take off again.