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Forest fire prevention

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  • Time of issue:2020-04-15 10:30
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(Summary description)

Forest fire prevention

(Summary description)

  • Categories:solution
  • Author:
  • Origin:
  • Time of issue:2020-04-15 10:30
  • Views:
Information
Forest fire prevention video monitoring system
 
Part One Background
1. Background and Challenge
Forest fire is one of the most important forestry disasters in the world. With the continuous development of China's afforestation cause, fire prevention work has become the primary task. Building early warning of forest fire prevention is a key to achieving the safety and stability of forest fire prevention.
The foundation is an important part of the construction of "prevention of forest fires" and an important carrier for forest protection. With the continuous development of China's afforestation business, fire prevention work has become the top priority. Forest fire prevention
It is necessary to implement the principle of "preventing first, actively fighting" and truly achieve early detection and early resolution. As the monitoring technology has matured, the Smart Detect thermal fire alarm Scan Detect Alarm Locate (S.D.A.L) system has been widely used in the field of forest fire monitoring.
How to build an "early detection, early resolution" intelligent forest fire prevention early warning system, and how to build a monitoring system that serves public security business are difficult issues in the forest fire prevention construction process under the new situation.
Combining with the current development trend, and based on the needs of forest fire prevention, Powerview has built a forest fire prevention and control circle, and Powerview has launched an intelligent thermal imaging fire alarm Scan Detect Alarm Locate program to carry out forestry security control, rescue , Command and decision-making and other comprehensive applications to provide core global service support.
2. Solution
Forests are the purifiers of air; forests have a natural epidemic prevention effect; forests are natural oxygen plants; forests are natural mufflers; forests have a regulating effect on climate; forests change low airflow, prevent wind and sand and reduce floods, nourish water sources, and maintain soil The role of forests is to remove dust and filter sewage; forests are habitats for a variety of animals, as well as growth sites for many types of plants, and are the most active areas for the reproduction of life on Earth.
Modern high-tech is developing day by day, and the advantages of thermal imaging in forest fire prevention are becoming increasingly obvious. Infrared thermal imagers are imaging devices that reflect the surface temperature of objects. Therefore, in addition to being used as on-site monitoring at night, they can also be used as effective fire alarm devices. In large forests, fires are often caused by invisible hidden fires. of. This is the root cause of devastating fires, and it is difficult to find such hidden fire signs with the existing common methods. The application of infrared thermal imager can quickly and effectively find these hidden fires, and can accurately determine the location and scope of the fire, find the fire point through the smoke, so as to know the early prevention and early suppression.
Infrared thermal imaging has a strong ability to penetrate fog and water vapor, and is not affected by bad weather. Traditional video surveillance uses visible light to monitor. If there is fog and haze, it is difficult to find the fire hidden behind the smog. The working band of thermal imaging is 3-5 microns and 8-14 microns long wave infrared with extremely high atmospheric transmittance. The attenuation of thermal imaging transmittance by fog and water vapor is very small. In fog and haze weather, thermal imaging can be worn Through the haze, fire in the distance was found.
3. Features and advantages
The "Forest Fire Prevention Digital Monitoring and Early Warning System" avoids the limitations of the original manual lookout to observe the fire situation, and realizes the digitization and scientificization of forest area management, which greatly reduces the expenditure and management costs of the forestry department and improves the effect of forest enterprises.
The system features are:
1. Forest fire automatic identification system, realize automatic fire alarm.
2. Nano-wave filter technology penetrates the smoke for clear imaging.
3. Outdoor high-quality optical cable transmission to avoid transmission loss.
 
4. The main functions realized are as follows:
 
1. The monitoring and commanding screen wall can display the image of the front-end collection point in real time.
2. All video images are recorded and stored in the whole process, and can query and playback historical images in the past.
3. Adopt field heavy-duty digital echo pan-tilt head with real-time echo position information function; equipped with electric long focal length lens and low-illumination high-definition camera; the pan-tilt head can be controlled by special operation keyboard or monitoring software
4. Realize the monitoring of the whole forested area through the set monitoring points.
5. The system has high security, and adopts personnel identification authentication, access control function and audit function to ensure the safety and reliability of the system.
6. Convenience of inquiry: adopt time flow design, data retrieval can be completed by time, date and front-end collection point.
7. Optical cable transmission mode to reduce system cost.
8. Fire recognition alarm: When the surveillance camera catches a forest fire, the system confirms the location of the fire point, and informs the staff through the sound alarm information.
9. Power supply system: The power supply is provided in an all-weather environment to ensure uninterrupted power supply to the system.
10. Lightning protection grounding system: The system must have safe lightning protection grounding protection measures to ensure that the system can operate safely.
 
Part Two System Architecture
system structure
Part 3 Introduction of Pyrotechnic Identification Software
Platform Introduction
The system software platform mainly realizes the management, control and display of multiple sets of front-end equipment, pyrotechnic identification and alarm, precise location of the fire point, real-time weather information display, alarm video query and other functions.
 
Pyrotechnic recognition software function introduction
 
5.1 Intuitive alarm method: FR2000 software uses sound + optical dual alarm method, after receiving the front-end alarm, there will be a preset sound alarm within 1 second to remind the user to check. At the same time, the thermal image and visible real-time video image of the suspended alarm are popped up, and the fire source position identification box is filled in the video image to highlight the alarm point information. In addition, the fire point azimuth and distance information are also displayed at the same time, which is convenient User observation.
 
Household observation
 
The warning frame in the video image highlights the alarm point information
False alarm zone shielding: In actual scenes, there will always be some non-fire high-temperature hotspot targets, such as rooftop solar equipment, farm house fire chimneys, flat metal that can reflect the infrared rays of the sun to form a virtual heat source, etc. These targets will be used as heat source targets to generate false alarms and increase the false alarm rate. The FR2000 fire prevention warning software specifically targets these targets, and adds a false alarm shielding function. A polygonal false alarm zone can be set. During the scanning process, each frame of image can be analyzed, automatically adapting to changes in the size and number of targets, and automatically shielding solar equipment in the scene. , Chimneys, metal and other false high-temperature false alarm areas, effectively reduce the false alarm rate and improve the alarm accuracy rate.
 
Accuracy
FR2000 software shields the false alarm zone function
Based on 3D GIS elevation data positioning: After receiving the alarm positioning data returned by the front end, the FR2000 software calculates the fire quickly and accurately based on the joint calculation of the GPS position of the front end device, the gimbal position information, the fire source pixel coordinates and the map 3D GIS elevation data The GPS location of the point and the location of the fire point on the electronic map, the positioning accuracy can be up to tens of meters.
 
FR2000 software shields the false alarm zone function
FR2000 software built-in digital elevation positioning principle
Interactive electronic map and fire point positioning display: The built-in interactive electronic map of FR2000 software not only has functions such as zooming, ranging, positioning, and printing, but also can perform data interaction with the front-end device. The electronic map can receive the GPS position of the front-end device, The video stream data and the angle and orientation information returned by the gimbal display the installation location and real-time radar-type scanning area of ​​the front-end device on the map. At the same time, the real-time video image of the selected front-end device can also be displayed on the map. The user can See the real-time scanning area and video at the same time, intuitive and easy to understand. At the same time, the user can directly click on the corresponding area on the electronic map, and the electronic map can send a control command to the corresponding front-end device to point it to the corresponding area, so as to achieve quick and intuitive positioning. When an alarm is generated, after receiving the alarm positioning data returned by the front end, the FR2000 calculates the GPS position of the fire point quickly and accurately based on the joint calculation of the GPS position of the front end device, the gimbal position information, the fire source pixel coordinates and the map 3D GIS elevation data Mark the location of the fire point on the electronic map, so that users can easily see the specific location of the fire source in the map.
 
FR2000 software built-in digital elevation positioning principle
 
FR2000 software built-in digital elevation positioning principle
 
Identify and locate the fire point information on the electronic map
 
Fire point information marked and located on the electronic map
Live video images can be suspended on the electronic map
       360o panorama with PTZ control function: The built-in panorama stitching function of FR2000 can perform 360o full-range scanning with the camera as the center, stitching out an actual panorama picture, which is more realistic and intuitive than electronic maps. And automatically mark the preset position of the gimbal with a yellow dot on the panorama, the user can directly click the preset position on the panorama, and the gimbal automatically turns to this position, which is more intuitive and simple than the conventional gimbal operation . At the same time, the current camera viewing range will be displayed on the panorama in real time with a red box, so that the user can very intuitively grasp the current camera viewing position and the orientation of the target in the entire scene. In addition, the false alarm zone will also be displayed on the panorama with a blue polygonal frame, which is convenient for users to judge the shielding of the false alarm zone.
 
Panoramic splicing map with preset position and masked area display
Thermal image panorama mosaic
 
Panoramic splicing map with preset position and masked area display
Panoramic splicing map with preset position and masked area display
 
System and log management: system management function, you can add and delete front-end equipment, name editing, encoding device related parameter settings, user to add and delete management, system parameter settings, and there is also a detection wizard function to help unfamiliar users set up step by step Scan detection. Log management can record equipment operation records, system connection login, alarm records, alarm point picture capture and video recording, which is convenient for users to search and playback.
 
System management interface
System management interface
System management interface
 
Part IV Device Function Introduction
 
Part IV Device Function Introduction
 
Front-end dual-band camera
The following table is the technical indicators of several commonly used dual-band forest fire protection equipment
model
 
TTVC4105-1920
 
TTVC4307-1920
 
TTVC4515-2050
 
Detection distance *
 
2000m (to 2mX2m heat source)
 
3000m (to 2mX2m heat source)
 
6000m (to 2mX2m heat source)
 
detector
 
The fifth generation uncooled focal plane array VOx detector
 
Resolution
 
336x256 pixels
 
Spectral range
 
7.5 ~ 14μm
 
NETD
 
50mK (@ 25 ℃ F1.0)
 
Lens focal length
 
50mm F1.0 fixed focus
 
25-75mm three times continuous zoom
 
31-155mm five times continuous zoom
 
Angle of view
 
6.5 ° × 4.8 °
 
13 ° × 9.7 ° ~ 4.3 ° × 3.2 °
 
11.25 ° × 8.5 ° ~ 2.25 ° × 1.7 °
 
Lens control
 
Motorized zoom, focus (auto focus optional)
 
Visible light sensor
 
1 / 2.8 '' target surface CMOS, 2MP high-definition movement integrated ICR dual filter day and night switching color to black CMOS
 
Visible light lens
 
20x optical zoom, 4.7 ~ 94mm focal length
 
15 ~ 500mm HD infrared correction lens
 
Image Processing
 
1. No need for TEC to stabilize the working temperature, the starting speed is less than 4 seconds
2. SDE digital image enhancement technology to enhance the details of the image
3. 10 kinds of pseudo-color images and hot black and white polar images
4. Brightness, contrast, gamma correction
5. 2X digital zoom
 
Hot spot target intelligent detection alarm
 
1. 255-level alarm threshold can be set
2. The target size range can be set to automatically identify targets of different sizes
3. The number of 1-16 alarm targets can be set, and the most prominent target display is automatically selected
4. Video superimposed alarm box + data return (or switch value) 2 alarm methods, the alarm is intuitive and easy to read
5. Optimized front-end fast processing algorithm, based on each frame analysis, alarm response 0.1S, no delay, no information loss
6. All alarm parameters and instructions can be set remotely through the video OSD menu, no special background software is required, and can be used with any video encoder, strong versatility
7. Optional IP network coding transmission, free back-end platform and SDK, easy to use or convenient for secondary development
 
PTZ
 
1. Load capacity, 30kg (top load)
50kg (top load)
2. Range, horizontal 360 °, pitch -75 ° ~ + 45 °
Pan 360 °, pitch -75 ° ~ + 45 °
3. Rotation speed, level 0.1 ~ 60 ° / S, pitch 0.1 ~ 30 ° / S,
Pan 0.1 ~ 30 ° / S, pitch 0.1 ~ 15 ° / S
4. 80 preset positions
5. Windproof and anti-shake
 
Control interface
 
1. RS-485 (PELCO-D \ P protocol, baud rate: 2400bps / sec), RS-232 (optional)
2. OSD menu remote call operation
3. PAL composite video output
4. AC24V power supply (DC24V optional)
5. Waterproof aviation plug
 
Environmental index
 
1. Super strong aluminum alloy shell, the shell is sealed to avoid the growth of mold and the generation of water vapor
2. Working temperature: -25 ° ~ 55 ° (-45 ° optional)
3. Power consumption: normal state 8W, start peak, 36W (excluding PTZ power consumption)

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Time of issue:2020-05-12 00:00:00
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