Wireless video surveillance system opens up new ways

The wireless video surveillance system is a small-scale remote digital surveillance system. It can be used with a network camera. It can be wired or wirelessly connected to a network. It is easy to install, and does not require users to configure additional computers and video recording equipment. The user can use a mobile phone or a computer as a monitoring terminal device to receive alarm information and view monitoring video anytime, anywhere. With the development, wireless remote video surveillance system is undoubtedly the future direction of development.

What are the elements that make up a wireless video surveillance system?

The equipment needed for a simple cable video surveillance system is only an analog camera and an analog capture card (the cheapest PCTV card is enough). If you want to form a wireless video surveillance system, you also need a wireless video transmitter and a wireless receiver.

Analog camera The analog camera is the key device in the system. The analog camera and the digital USB camera have the same principle, but the interface uses the AV interface, RCA Lotus, which can be directly connected to computers, televisions, video recorders and even DV, using computers, TVs as monitors, using computers, video recorders or DV to save image. The imaging device of the analog camera has two kinds of CMOS and CCD, the cheapest CMOS black and white camera is less than hundred yuan, the CMOS color camera is about 150 yuan, and the CCD color camera is less than four hundred dollars. In general, CCD imaging quality is better than CMOS, but CMOS has a prominent advantage that CCD does not have, that is, its spectral sensitivity range is 5-6 times higher than that of visible light in the near-infrared light sensitivity. Therefore, infrared light-emitting diodes are used at night as Illumination lighting, although the human eye still looks dark, but the CMOS camera can see clearly! Therefore, the CMOS camera is more suitable for concealed observation at night. In addition, the power consumption of the CMOS camera is also much lower than that of a CCD camera, which is more suitable for long-term monitoring.

In order to play a covert role, the shapes of these cameras are also strange. There are cat-eye type cameras that are suitable for installation on security doors. They have very concealed buttons and screw-shaped cameras, as well as spotlights and hemispherical cameras. The hemispherical camera can be installed on the roof. Its surveillance range is five times larger than that of an ordinary camera. Like the camera of the spotlight, it can turn on the infrared compensation light source in low illumination, and it can also be continuously operated under the dark environment. Surveillance.

Analog capture card The analog capture card is used to receive signals transmitted by an analog camera for receiving images and recording via a computer. There is no special requirement for this kind of analog capture card, and the capture card with AV analog terminal can be used. The simpler ones can use ordinary PCTV cards, which can be used to watch TV as well as analog video equipment. If multi-channel video surveillance is to be performed, a multi-channel video capture card dedicated to video surveillance needs to be purchased.

Wireless transmission and reception devices have low cost for wired video surveillance, but their use is too restrictive: wiring is required, and the transmission range is limited. If wireless devices are used, there is no such problem. There are two types of wireless monitoring devices: one is the use of a wireless camera, which itself carries a wireless transmitter and an antenna, the receiver receives audio and video signals through a wireless receiver, and the other is a dedicated wireless audio and video device, which includes wireless transmission. Machine and wireless receiver in two parts.

The wireless transmitter provides an AV interface for the analog camera to access, and generally uses 2.4 GHz frequency to transmit video signals. There are many specifications for this type of product, and prices are mainly differentiated by power. The price of a 50mW small transmitter is about 200~300 yuan (receiving range is 50~100 meters), 1000mW of high-end products, and the price is about 1800 yuan (receiving range 500~ 1000 meters). The transmission power and environment determine the distance of signal transmission. If you want to get a longer transmission distance, you can use directional antennas at the transmitter and receiver, which can extend the transmission distance by several times. There are two types of receivers: a small receiver, a desktop receiver, where the desktop can be set to automatically switch between the specified 2 to 4 channels, and the automatic switching time can be set. The price of an ordinary small receiver is about 160~180 yuan, and the price of a desktop receiver is 100 yuan.

The installation of a monitoring system is not complicated. In addition to the hardware system, you also need suitable monitoring software.

Advantages of Wireless Video Surveillance System ● High flexibility: Modern production companies require video surveillance without dead ends. The wireless video surveillance system is not limited by cables and has flexible extensibility. It can be easily added at any time in the factory area. Monitoring points, and can change the location of the old monitoring, increase the location of uncertainty, so that the real implementation of security monitoring;

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● Low cost: The wiring cost is low and no professional construction team is required. This feature is suitable for monitoring and management of SMEs;

● High mobility: The wireless video surveillance system allows users to access network data at any time and in any location within a certain space. It does not need to specify a specific location for access. This feature provides the possibility for enterprise managers to provide random checks on plant sites.

● Short construction period and easy maintenance: Enterprises are often restricted by geographical environment and working environment. The construction period of the cable system is very long, and even some places have no way to realize the wiring project. At this time, wireless monitoring is used to fundamentally break the shackles of cables and install them flexibly;

● High scalability: Within the bandwidth permitted by the wireless AP, monitoring points and wireless terminal users can be expanded.

Future Wireless Video Surveillance System Can Extend Hot Spots Elevator Remote Monitoring System Popularity In early January, the State General Administration of Quality Supervision, Inspection and Quarantine issued the “Opinions on Further Strengthening the Safety of Elevators”, which defined the safety management responsibility of elevators and clarified the use of elevators. Responsibility principals advocate the use of security technologies, such as long-distance video surveillance systems based on the Internet of Things to protect elevator safety.

As for the main responsibility of the elevators, legally speaking, all the owners of residential buildings are the “owners” of the elevators and should be responsible for the safety of the elevators. However, if the owner authorizes or commissions the property company or other unit to manage the elevator, the safety responsibility is transferred and the authorized or commissioned unit must assume the first responsibility for the use of the elevator. The relevant person in charge of the Special Bureau of the General Administration of Quality Supervision, Inspection and Quarantine stated that at present, the responsible person of the Guangdong Provincial Administration of Industry and Commerce and the quality supervision department that issued the owner’s entrusted elevator management also stated that to ensure the safety of elevators, it is necessary to support the society. Promote the use of technical means to improve the safety of elevators and encourage the promotion of remote elevator monitoring system based on the Internet of Things technology pilot and application, to achieve timely detection of elevator faults and remote diagnosis, to achieve the timely alarm and the fastest rescue elevator accidents.

Remote monitoring of national examination applications During the 2013 National Postgraduate Entrance Examination, all test sites in Jilin Province were equipped with a radio signal masking device and an electronic monitoring inspection and control system. All rights reserved. Extensive online remote monitoring and image storage was performed on the examination room. Every move was recorded throughout.

When Wang Xitang was formerly an old Yan, he flew into the homes of ordinary people. The use of electronic monitoring and inspection systems across the country for real-time remote monitoring and recording is the beginning of the perfect combination of distance education and remote monitoring. It can be predicted that in the near future, remote monitoring will spread all over the world. The implementation of modern distance education and long-distance monitoring is also an effective way to speed up education development, increase the level of science and culture of the entire nation, and change the unhealthy atmosphere in the examination room under the conditions of the shortage of educational resources in China.

Wireless remote video surveillance system is the future development direction Wireless remote video surveillance and high-definition, intelligent together become the main development trend of video surveillance industry in the next few years.

With the continuous development of 3G technology, the application of civilian technology and technology integration will become the development direction of wireless remote video surveillance systems.

The application of civilian video surveillance systems is undergoing a process of transition from industrial applications to civilian use. The emergence of wireless application terminals has contributed to this process. With the further development of 3G technology, handsets held by each individual have become the best wireless terminal service platform. People can realize wireless network monitoring through mobile phones. At the same time, home wireless networks are also emerging. People can use laptops to access networks through wireless routers and quickly build HWLANs (home wireless networks). Home-based network cameras that support wireless mode will take care of home care and shop visits, making wireless monitoring technology more accessible to home users.

Technology integrated network video surveillance technology has been taking a road of technological integration. From the initial network video server, to the subsequent launch of the one-piece network ball, to today's very popular network cameras, the network video technology has realized the integration with the ball-head platform technology and the camera technology. When wireless technology is increasingly involved in the field of video surveillance, the combination of network video technology and wireless technology has become a matter of course, which also helps to further improve the stability of the product and the ease of application, is conducive to the vendor segmentation network Video market to avoid homogenous competition.