I. Overview of the system

Forest fires are sudden, random and can cause huge losses in a short time。Therefore, once a fire occurs, it is necessary to take rescue measures at a very fast speed, whether the rescue is timely, whether the decision is appropriate, it is important to depend on whether the discovery of forest fire behavior is timely, and whether the analysis is accurate and reasonable。The traditional fire alarm system is generally based on infrared sensors and smoke sensors, that is, to detect the smoke, temperature and light parameters generated when the fire occurs, and send out the fire alarm signal after signal processing, comparison and judgment。The typical smoke sensing and temperature sensing fire detection and alarm system can not quickly collect the smoke temperature change information from the fire, so it is difficult to meet the requirements of early detection and prediction of fire。Despite the rapid development of science in today's world, human beings have not yet made great progress in subduing forest fires。

With its own night vision technology such as laser lighting and infrared thermal imaging, combined with image acquisition, network transmission and display system, Shenrong Company has developed a forest fire protection intelligent analysis system that can be continuously monitored day and night。The system is based on digital and networked video surveillance, compared with the general networked video surveillance, it is a higher-end intelligent application。The intelligent analysis system of forest fire prevention can realize unattended uninterrupted work，Automatically analyze and judge the video image information;Detect abnormal smoke and fire signs in the monitoring area in time，Perform fire alarm and fire analysis in a fast and efficient manner;Can effectively assist fire personnel to deal with fire crisis，And minimize the phenomenon of false alarm and missing alarm;You can also view live images，Direct command and dispatch fire fighting according to intuitive screen。

Second, system composition

The intelligent analysis system of forest fire prevention is composed of front-end equipment and back-end video management system。The front-end equipment is composed of infrared thermal imager + forest fire alarm module + visible light camera + high-precision intelligent PT-head + network transmission equipment, which is mainly responsible for image acquisition, analysis and alarm detection。The back-end video management system consists of the central server + video storage server +GIS management server + alarm linkage server + streaming media forwarding server + emergency command server + intelligent power supply and fault management server + client monitoring software，Mainly responsible for equipment management, user management, video surveillance video, streaming media forwarding, fire confirmation and analysis, fire source location, GIS map annotation and other functions。

In general, the front-end equipment carries out fire detection in the form of cruise or spot monitoring。Once a fire is detected, the device immediately stops cruising, locks the fire source, and automatically zooms in on the fire source, while sending an alarm message to the back-end video management system。The video management system received the alarm，Trigger the sound and light alarm，Alert duty officers of a suspected fire，The duty officer then conducts fire confirmation，If it's a false positive，Then cancel alarm，The front-end device continues to monitor according to the set rules，If it's a fire，Command orders are issued to patrol personnel，Activate the alarm video at the same time，And through the SMS alarm module alarm information will be timely notified to the relevant personnel。

Three, front-end equipment features

 ■ Using continuous zoom thermal imaging technology, imaging clear, long detection distance, can not only search a large range of fire, but also close observation of fire conditions

 ■ Special high temperature alarm detector, high sensitivity, low temperature resolution up to 50mK

 ■ Front-end direct high temperature digital alarm, professional forest fire alarm algorithm, higher efficiency and accuracy

 ■ After the alarm, the fire source can be automatically centered and amplified, which is easy to confirm the fire

 ■ Day and night low light fog camera, can cooperate with detailed observation

 ■ Excellent autofocus technology, can achieve a variety of focusing mode and trigger mode

 ■ 3D positioning function, in the thermal camera and visible light screen, can achieve frame selection and magnification and click center function, reduce the difficulty of operation, improve the ease of use of equipment

 ■ Monitoring shield area can be set to reduce false positives

 ■ Universal gear shift head, realize all-round blind Angle monitoring, and achieve high precision positioning

 ■ Professional design shell, beautiful, light, strong, high temperature resistance, corrosion resistance, waterproof, acid rain

4. Functional characteristics of software platform

The forest fire prevention video management system is based on the front-end monitoring equipment and video encoder, and adopts the C/S architecture to send data and information to various servers in the service area through the network transmission link in the interaction area。Clients in the service zone manage and process monitoring services. The following figure shows the system architecture。

■ Central server

Manage other servers and front-end devices in a unified manner, complete user rights identification, device distribution configuration, configuration management of other servers, device classification, video planning, user management, device control command forwarding, log recording and management等。

■ Video storage server

Store video files of front-end devices, including planning video and alarm video。

■ Streaming media forwarding server

Forward the video and audio data of the front-end device to the server and client that apply for the video and audio stream, effectively reduce the bandwidth requirements of the front-end device, and effectively isolate the front-end device from the client to ensure the security and robustness of the front-end device。

■ Intelligent power and fault management server

The industry characteristics of forest fire prevention determine the particularity of the installation location of the front-end equipment, and the inconvenient wiring leads to the power supply of the equipment to rely on solar energy or wind and solar complementation。The intelligent power supply and fault management server periodically inspect the power supply equipment to display the working status of the equipment in real time.When the device fails, inform the user in time and provide a solution。

■ GIS management server

Electronic map management and basic operation, equipment installation point management and configuration, fire source location confirmation and display, fire spread trend analysis, fire extinguishing resources management, map layer management, map plotting, best fire extinguishing path, disaster damage assessment, head control, equipment positioning and map positioning functionsAnd cooperate with the emergency command server to complete the fire fighting command。

■ Alarm linkage server

When a fire occurs in the monitoring area, the alarm linkage is started according to the set plan, and the audible and visual alarm is linked in the management center to remind the personnel on duty to pay attention to view and deal with the danger in time。After the on-duty personnel confirm, the alarm information generated will be sent to the designated mobile phone number through SMS or MMS, and timely inform the management personnel, so that the management personnel can organize the rescue force in the first time。

■ Emergency command server

Combined with GIS management server, weather conditions and historical data, the fire danger area is analyzed and judged, the spread direction of the fire is displayed in real time, and the effective rescue path is judged。

■ client

The system realizes the real-time video monitoring of the monitoring area, and can display the front-end real-time scene on the display terminal of the monitoring center。Background management uses C/S architecture, a computer as a monitoring center server, multiple client software。The associated screen display of alarm events enables the monitoring personnel to easily complete the monitoring of the entire system。 

五、 Partial application case

■ Ordos forest fire prevention project in Inner Mongolia

■ Yanshan petrochemical forest fire prevention project

■ Shandong Qianfo Mountain scenic forest fire prevention project

■ Taishan scenic area forest fire prevention project

■ Qingdao Xiaozhu Mountain National Forest Park fire prevention project

■ Jiuquan, Gansu forest fire prevention project

■ Jinan high-tech zone forest fire prevention project