With the national emphasis on wild nature reserves, wireless video surveillance systems of all sizes have begun to be widely applied to forest protection areas. With the increasing development of Internet and broadband network technologies, traditional text-based and picture-based content services can no longer meet the needs of users. Multimedia content services with video and audio are about to become mainstream. This is the inevitable trend of Internet technology development. At the same time, various high-efficiency compression and decompression algorithms are proposed, which provide the possibility for multimedia information transmission on the network.
The use of telecommunication broadband networks has become an indispensable part of our lives and work. The real-time transmission or streaming media technology in mobile broadband networks will be a hot spot for the development and application of new technologies now and in the next five years. The new generation of wireless security monitoring systems based on 3G/4G network technology has made wireless transmission of video and audio on mobile broadband networks a trend. The solution for integrating video, audio, and data for network transmission has the features of simple structure, complete functions, networked management, high reliability, and high integration. The most important is that it is not covered by geographical terrain and traditional Internet. limit.
1. Project Overview With the country's emphasis on the forest environment, various wild forest nature reserves in China have also accelerated the development of informatization. At present, forest fire prevention and nature reserves in many areas have established comprehensive information network systems. Remote image monitoring is one of the key requirements for the informatization of these departments. How to use the established integrated information network system to integrate 3G/4G wireless monitoring services into the system, which can reduce the investment for establishing a dedicated monitoring network system, and can also meet the needs of monitoring and sharing of information among various business functional departments.
1.1 Industry Overview With the development of information system for nature reserves, the internal transition from extensive management to information management has gradually strengthened the centralized management of various animal and plant resources within the protected area. The nature reserve in China has the largest area in China. To maintain a complete original state mountain mossy evergreen broad-leaved forest, with forest and its water conservation effect, the type of protection area is forest ecological resources protection area. In recent years, although comprehensive achievements have been made in the prevention of forest fires and the protection of forest resources through comprehensive management, forest fire prevention has been plaguing the forestry sector. The frequent occurrence of forest fires has still not been fundamentally curbed. With the continuous development of afforestation, the area of forest land and forestry volume increase year by year, and the work of forest fire prevention has increasingly become the top priority. Forest fires are one of the most important forestry disasters in the world. Each year, a certain number of forest fires occur, causing major loss of forest resources and global environmental pollution. Forest fires have the characteristics of suddenness, random occurrence of disasters, and huge losses in a short time. Although it is impossible to avoid forest fires completely, the degree of harm can be controlled by measures such as prevention and timely suppression. Therefore, once a fire alarm occurs, it must be taken at a very fast pace. Whether the suppression is timely and whether the decision is appropriate depends on whether the discovery of the forest fire behavior is timely, whether the analysis is accurate and reasonable, and whether the decision-making measures are appropriate. In order to prevent, reduce, and control forest fires, forest fire prevention work should be standardized, scientific, and informative as soon as possible, and the “precautionary-oriented, active-fighting approach” should be implemented to truly realize early detection and early resolution of comprehensive forest fire prevention capability demonstration projects. The construction of forest fire field video surveillance systems is particularly important.
1.2 System Components The 3G/4G wireless video surveillance system consists of three parts: the front-end image acquisition system (including the power supply system), the wireless transmission system, and the back-end monitoring and management command system. It is a set of complete solutions for the comprehensive management of the "remote protection zone wireless monitoring system" that is specifically designed for the geographical characteristics of wildlife and nature reserves. The system meets the needs of local monitoring and central networking multi-level networked video surveillance. The 24-hour real-time monitoring of the security of the protected area is not limited by the geographical location and distance, which reduces the labor intensity of the security monitoring personnel and provides a strong guarantee for the command of the monitoring center, so that the dispatchers at all levels of the monitoring center can monitor the remote Transmitting on-site images, intuitive, accurate and timely understanding of the actual situation in each district.
1.3 Industry characteristics and equipment selection The forest fire prevention long-distance video monitoring system puts forward many requirements with strong industry characteristics. These requirements cannot be met by ordinary video monitoring systems. Therefore, the fire prevention intelligent monitoring system needs to have the following characteristics:
All-weather long-distance work: fire-fighting information collection points must work around the clock, which requires the use of infrared sensitive color-to-black-and-white cameras when selecting cameras. The lens should be equipped with a telephoto lens of day and night type, and it can see a small area of fire at a relatively long distance and outside, and it also has a fog-permeability function; PTZ needs to use a screw-driven outdoor integrated heavy-duty head, in order to reduce the distance. The jitter of the image and the installation of the camera must also be ensured. The front-end equipment adopts sealing and isolation protection measures, and all the important electronic core devices of the system are sealed in the protective cover designed by the carbon fiber structure to ensure that no fogging or condensation occurs in the equipment inside the protective cover. At the same time, the protective cover window glass is made of white tempered glass and attached with a heat plate to prevent fogging and condensation on the surface of the window and prevent the monitor image from appearing blurred or deformed.
Front-end equipment working status remote monitoring: As the entire front-end equipment for fire prevention information collection is located in the mountains, maintenance is extremely inconvenient, so if the center can grasp the working status of the front-end equipment at any time, it will play an important role in guiding and analyzing the maintenance, on the one hand reducing the entire The strength and cost of system maintenance work, on the other hand, also protect the interests of users.
Intelligent forest fire fire analysis and early warning: It is difficult to rely on duty personnel to find early fire through the monitor. With the development of intelligent video analysis technology, the early recognition of fire and smoke has gradually begun to be applied. The system needs to be able to automatically detect fires and alarms in real time and link alarm recordings in a timely manner to remind the on-duty personnel to look at the display screens to achieve early detection, early notification, and early suppression.
Monitoring room construction: build a large screen of the monitoring room to facilitate real-time monitoring of field surveillance images, remote monitoring of forest areas, and unattended operation.
According to the requirements of the video surveillance business, we adopt the networked distributed video access, centralized control management, and distributed sharing strategy to adopt wireless communication methods to realize the video surveillance function of coal mines.
Networked distributed alarm signal and video access refers to the use of dedicated 3G/4G video access equipment to transmit surveillance video to network base stations nearby.
Centralized control management refers to the control and adjustment of video access and access services and alarm information processing through specialized video servers and digital radio receivers.
Distributed sharing refers to the transmission of surveillance video through the network, and meets the sharing requirements of portals of multiple business functions.
2. Project Design Reference Category 2.1 Description of the Project - This project was launched by Shenzhen Shenzhen Sci-Tech Co., Ltd. The solution mainly introduces the wireless monitoring function of the protected area through the 3G/4G network video transmission equipment.
2.2 Applicable objects Wildlife Nature Reserve Wireless Monitoring 2.3 Feature Overview Whether it is the original G network mobile phone, C network mobile phone, or the latest 3G mobile phone, as long as your phone can support multimedia networks, you can achieve mobile video viewing. Through the mobile phone can video video switching, video capture, PTZ control, focal length control.
The server is equipped with motion detection alarm and video loss alarm function, alarm linkage video recording, pre-recording with 10-20 seconds before alarm, linkage with intelligent analysis module can realize intelligent video analysis alarm (perimeter intrusion / suspicious object detection / object Missing detection/people statistics and other functions). External alarm input and output devices can be connected to provide RS485 interface.
Supports two-way voice transmission, users can hear the real-time sound through the computer, but also through the computer microphone to send the sound to the scene.
With the video system management platform supporting the global visual information platform, users can simultaneously monitor and manage tens of thousands of online devices, and can remotely control, set up, add and delete devices, and manage multi-user rights. Users can log in to the website platform at any place and time to operate. The platform fully meets the carrier-level platform requirements.
2.4 Program Advantages (1). Optional support for GPRS/CDMA/EDGE/3G mode mobile browsing.
(2) Dual-stream output, one for high-definition video signals for local video storage; the other for wireless network transmission for remote PC viewing and mobile video viewing.
(3). It has alarm input, motion detection alarm, video alarm and alarm linkage output, and provides RS232 network transparent channel interface.
Two-way voice intercom, car hard disk video recording, GPS positioning, car media playback in one of the all-round, multi-functional vehicle monitoring equipment, video screen clearer, 8-32 volt wide power supply design, to meet the direct power supply of any vehicle, more convenient to use ;GPS real-time positioning, single card four, 4 CIF real-time transmission, two-way voice intercom, alarm input and output, transparent serial port, car shock absorption, SATA hard disk interface, the highest four-channel D1 video, built-in GPS module 6. Built-in WEB preview The function can be accessed by IE.
(4) Support two-way duplex voice intercom, one-way voice broadcast.
(5). Support PTZ and electric lens control, support multiple decoding protocols.
(6) Supports video, audio, alarm, voice data, serial data transmission over TCP/IP and UDP/IP networks; supports a variety of 3G networks.
2.5 Topology
