When the wireless network is not developed on a large scale, it is more to adopt the wired layout mode, which invisibly brings great inconvenience to the arrangement of the monitoring system, because even with the best optical fiber wiring, it is effective. The transmission distance is also limited. In order to travel farther, it is necessary to add other corresponding devices to connect. As the scale of our wireless network applications continues to expand, and its technology continues to improve, especially the speed of wireless transmission is getting faster and faster, it has spawned a wireless network monitoring system.
In-depth wireless video surveillance system
Wireless video surveillance is based on wireless network technology. Wireless video surveillance requires no wiring, and uses a radio wave to monitor the data such as video. An important part of the wireless video surveillance system of wireless network cameras. 3G wireless network cameras and wifi wireless network cameras have also appeared on the market, both of which do not require wiring and are easy to install.
Wireless video surveillance is mainly divided into analog microwave transmission and digital microwave transmission. The analog microwave transmission is to modulate the video signal on the channel of the microwave, and transmit it through the antenna. The monitoring center receives the microwave signal through the antenna, and then demodulates the original video signal through the microwave receiver. The monitoring center can also obtain clear images by controlling the gimbal and lens, without delay, lossless, and low cost.
The digital microwave transmission first compresses the video code, modulates it through the digital microwave channel, and then transmits it through the antenna. The receiving end receives the digital signal, and the monitoring center device performs demodulation. Digital analog transmission can adapt to more complex environments, with many monitoring points and strong anti-interference ability, and can transmit multiple video signals in a centralized manner. It also controls pan/tilt and lens, supports recording, playback and management, and can choose resolution.
Compared with wired video surveillance, wireless video surveillance has many advantages such as low cost, good performance, scalability, maintenance cost, real-time monitoring and low construction difficulty. It has also been widely used in supermarkets, factories, intelligent buildings, bridge tunnels and port terminals.
Some people are not optimistic about wireless video surveillance, and believe that once the signal is not good, the entire wireless network monitoring system is paralyzed. Wireless video surveillance is a broken kite that will fall very heavy. This kind of statement is not unfounded. China Mobile, China Unicom and China Telecom, the three major network operators are holding the throat of China's network development, which naturally restricts the promotion and application of network products. Therefore, to break this situation, only the introduction of free market mechanisms, breaking monopoly and independent competition.
Of course, video surveillance is not a kite, and wireless video surveillance is not a broken kite. As a new way of monitoring a new model, wireless video surveillance will certainly encounter such problems in the future promotion process, but science is progressing, technology is developing, and the future society must be the network society and the digital society. Digital networks will be everywhere. At that time, wireless video surveillance may become as indispensable as the current computer.
Video surveillance wireless infrastructure doubled in 2016
"Wireless infrastructure offers a relatively inexpensive solution compared to cabling, providing a low-cost option for customers who want to build a monitoring network," said Ish video surveillance analyst Josh Woodhouse. â€œIn areas with extensive video surveillance facilities, such as the United States or the United Kingdom, the application of video surveillance wireless infrastructure is growing steadily. However, emerging regions lacking this infrastructure will generate the strongest growth momentum in the world, driving video surveillance wireless. The infrastructure market is booming in the coming years."
By 2017, the global video surveillance wireless infrastructure market is expected to grow at a compound annual growth rate (GAGR) of 17%. Global growth will be ahead of China, with a compound annual growth rate of 28.8%. The second fastest growing region is the rest of Asia, including India, which will grow by 27.9%. Mexico's compound annual growth rate is 23.1%, Brazil will grow by 17.4%, and the rest of South America will grow by 26.6%.
In the next few years, Asia is expected to be the fastest growing region in the world, as it does not currently have any wired monitoring infrastructure, and the region's wireless costs are lower and security needs are increasing.
Wireless intelligent security market explosive growth
As the foundation of the development of the Internet of Things, the security monitoring industry will benefit from the further development of the Internet of Things technology. The related digital, analog and HD-SDI high-definition technologies will be comprehensively improved, which will give users a rich choice. With the improvement of algorithms, intelligent analysis technology will begin to enter the actual project construction, especially video diagnosis and image retrieval. Will be strengthened. In 2012, the total output value of China's security industry has reached 325 billion yuan. Under the influence of the new policy, China's security market is expected to achieve a growth rate of 30%. In the financial, public security, transportation, medical, education, cultural, communications, energy, production and other industries, the application will be more extensive and in-depth, the business opportunities in the civilian security market will also explode.
The video search success rate is over 99%, the intelligent video recognition rate is over 90%, the daytime accuracy rate is over 90%, and the nighttime accuracy rate is over 80%. Intelligent video surveillance has become a weapon for enterprises to occupy the commanding heights of the security market. At present, nearly 400 cities have applied the company's products and technologies in the construction of smart cities.
Telecom operators have also targeted the Internet of Things home security market. First, China Telecom launched the "Global Eye" video surveillance service, which can be used in both the industry and home security surveillance. It also launched for smart homes and homes. Security's "3G Smart Butler" business; China Mobile has specially tailored the "livable" business standard for home security, allowing users to keep their doorphones, infrared detection, gas detection and even cameras at home. Monitoring status, anti-theft alarm, video surveillance, gas alarm, fire alarm and elderly help.
â€œThe wireless monitoring solution realizes 3G wireless monitoring and output of SD images in terms of image storage and traffic. Users can choose SD or HD according to their definition of image clarity, and the image resolution ranges from QVGA to 1080p.â€ Tianjin Wei Wei, dean of the School of Electronics and Information Engineering at the University of Science and Technology, said that supporting wireless or 3G surveillance electronic eye products will become the new favorite of the market. In addition, with the advent of the 4G era, 4G technology will gradually be applied in security products.
Wireless video surveillance application field
Thanks to the portability and flexibility of wireless monitoring, there are several main categories of wireless monitoring applications:
It is impossible to deploy the application scenarios of wired monitoring: such as transportation vehicles (cars, trains, ships), law enforcement management (traffic police, urban management), special escorts (armed police, banks, dangerous chemicals), etc. Under the mobile conditions, the wired network cannot be laid and covered. ;
Application scenarios that can be deployed but cost is too high or temporary wiring will be costly: the former such as resource monitoring (forest, river, oil field, substation, base station, border station, port, scenic area), etc., often due to geographical environment and work content In the case of restrictions, wide geographical areas and sparse users, the outdoor monitoring facilities of wired monitoring lines have a long working cycle, and the maintenance cost is very high, even impossible. The latter, such as public security investigation, temporary arming, army field training, temporary construction sites, temporary activities ,Exhibition Center;
Application scenarios that need to be newly added: such as homes, communities, shops, small and medium-sized enterprises, buildings, bridges, tunnels, intersections, etc. During the second construction, it is best not to damage the original decoration or work surface;
Should be acute, personnel can not access the application scenarios: such as emergency command (flooding, fire, rescue), inflammable and explosive dangerous places, mass gatherings, important safety and security mission sites, disease-infected areas, microbial danger zones, etc., need to be shorter Set up a complete monitoring network within the time.
China is still in its infancy in the field of mobile surveillance. Enterprises cannot develop their own brands or products with strong functionality and high added value. Nevertheless, with the development of 3G technology and the continuous popularization of services, the network signal coverage of the global and mobile video surveillance systems is becoming more and more mature and related regulations are being perfected, mobile video surveillance systems will surely usher in a broad market.
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