Security monitoring from wired to wireless, wireless technology from 3G to 4G, various security monitoring can be equipped with wireless transmission interface and media types have shown a diversified trend. From the transmission of data-based GPRS, Z-wave, Zigbee and WSN, to broadband wifi, WiMAX and ultra-wideband 3GTD, and then to 4GTD-LTE, basically the transmission technology that wireless security monitoring system can use. To ensure the stability of the data transmission banner, let's walk into the wireless monitoring together to see how it affects our lives.
Into wireless monitoring
Wireless monitoring products can be broadly classified into two categories: one is to monitor fixed or non-fixed locations through wirelessly transmitted mobile monitoring devices, such as vehicles passing through surveillance cameras mounted on the roof or through handheld surveillance cameras. Real-time image acquisition, and then transmit images to the monitoring terminal via the wireless network; Second, through the mobile terminal device, obtain images acquired by the fixed surveillance camera at fixed locations and places. At present, the main forms of mobile monitoring products are: bus mobile monitoring, vehicle mobile monitoring, mobile individual equipment and so on.
A typical wireless monitoring system is mainly composed of a camera part, a transmission part, a control and recording part, and a display part.
The camera section is the frontier part of the wireless video transmission system and is the "eye" of the entire system. When the area of ​​the monitored area is large, a zoom lens is added to the camera to make the distance that the camera can observe farther and clearer. The camera can also be mounted on the electric pan/tilt, so that the camera can drive the camera to level. And the rotation in the vertical direction, so that the camera can cover a larger range. In some cases, especially in the case of outdoor applications, in order to prevent dust, rain, high and low temperature, corrosion resistance, etc., special protective covers should be added to the camera and its lens, even to the PTZ. There are corresponding protective measures.
The wireless video transmission part is the image signal path of the system. In general, the transmission part refers to the transmission of images and sound signals. At the same time, since the control center needs to control the camera, the lens, the pan/tilt, etc. through the console, the transmission system also includes the transmission of the control signal.
The control and recording section is responsible for controlling the camera and its accessories (such as the lens and pan/tilt) and recording the image and sound signals. At present, the technology of the DVR is relatively perfect. It not only records images and sounds, but also includes functions such as screen segmentation and switching, and pan/tilt lens control.
The display portion is generally composed of several or more monitors. In the case that the number of cameras is not very large, and the requirements are not very high, it is generally possible to directly connect the monitor to the hard disk recorder. If the number of cameras is large and multiple monitors are required to perform complex switching display on the screen, a matrix must be implemented.
Wireless monitoring into daily safety production and living signs
In general, the effectively combined wireless and wired mode video surveillance system is currently a common choice for enterprise security systems. It can not only transmit the video files collected by the monitored points in real time to the monitoring center, but also dynamically report the monitored points in real time. The situation, timely detection of problems in a timely manner, and can effectively control the cost of the enterprise. Among them, the advantages of wireless monitoring applications can be summarized...
Nowadays, the role of monitoring systems in enterprise production, security and other aspects is becoming more and more important, and has become an important symbol of the degree of modernization of enterprises.
The simulation monitoring system, although the image is clear, smooth and real, but the cost of the cable, the difficulty of wiring and the amount of data of the simulation image are too large, so that the simulation monitoring system can not achieve long-term storage of video data at high cost, and the system flexibility is poor. With the maturity and development of wireless technology, it plays an increasingly important role in the field of video surveillance. By utilizing the advantages of wireless monitoring systems, system coverage can be extended and extended based on the original monitoring system.
In general, the effective combination of wireless and wired mode video surveillance system is currently the choice of enterprise security system, not only can the video files collected by the monitored points in real time be transmitted to the monitoring center in real time, and the situation of the monitored points can be dynamically reported in real time. Timely problems are detected in a timely manner, and the cost of the enterprise can be effectively controlled. Among them, the advantages and advantages of wireless monitoring applications can be summarized as follows:
High flexibility: Modern production companies require video surveillance without dead ends. The wireless video surveillance system is not limited by cables. It has flexible scalability and can easily add new monitoring points at any time in the plant, and can change the old ones. The location of the monitoring, increase the position uncertainty, so that the security monitoring is truly implemented;
Low cost: low wiring costs, no need to ask a professional construction team. This feature is suitable for the monitoring and management of small and medium enterprises;
High mobility: The wireless video surveillance system allows users to access network data at any time and in any space, without specifying a clear location of access. This feature provides a possibility for business managers to randomly check the location of the site;
The construction period is short and the maintenance is convenient: enterprises are often limited by the geographical environment and working environment. The construction period of the cable system is very long, and even some local wiring projects cannot be realized. At this time, wireless monitoring is used to fundamentally get rid of the constraints of cables and install them flexibly;
High scalability: Monitoring points and wireless end users can be expanded within the bandwidth tolerance of wireless APs.
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