CN103376163B - Thermal imaging is used for the focus of forest fire protection and fire point detection method - Google Patents
Thermal imaging is used for the focus of forest fire protection and fire point detection method Download PDFInfo
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- CN103376163B CN103376163B CN201210117819.7A CN201210117819A CN103376163B CN 103376163 B CN103376163 B CN 103376163B CN 201210117819 A CN201210117819 A CN 201210117819A CN 103376163 B CN103376163 B CN 103376163B
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Abstract
The invention discloses a kind of thermal imaging and put detection method for the focus of forest fire protection with fire, relate to forest fire detection method.Device systems is made up of thermal imaging system, The Cloud Terrace, embedded computer system; Thermal imaging system and embedded computer system are arranged on a protective cover and are built on The Cloud Terrace; Embedded computer receives the thermal-image data from thermal imaging system through digital interface, and thermal imaging system analog image output port exports through The Cloud Terrace; The equipment course of work: thermal imaging system imaging is the heat picture of object imaging thing, what imaging described is not color is temperature value, and the temperature being scene at the image of nature scene formation describes; In imaging data, higher than B point 80 degree of A point can conclude A point temperature anomaly, has the focus of doubtful thermoelectricity to be emerged, accuses fire alarm by computing machine.The invention solves prior art forest fire detection method and there is the low problem of detection accuracy.
Description
Technical field
The present invention relates to forest fire detection method.
Background technology
Forest fire is the most important disaster of the forest resourceies of harm preciousness; Early warning detection forest fire alarm fire is Timeliness coverage is the important means of forest fire protection.
The detection method of existing forest fire has: forest fire ground based IR Detection Techniques; Based on the MODIS forest fire monitoring method etc. of inter-class variance.There is the low shortcoming of detection accuracy in these forest fire detection methods existing.
Summary of the invention
The invention provides a kind of thermal imaging and put detection method for the focus of forest fire protection with fire, the invention solves prior art forest fire detection method and there is the low problem of detection accuracy.
For solving the problem, the present invention adopts following technical scheme: thermal imaging is used for the focus of forest fire protection and fire point detection method, introduce real-time distance parameter, Geographic Information System (GIS) is found range the temperature identification error that the distance parameter correction detection range that gets brings; Specifically comprise:
(1) equipment composition: system is made up of thermal imaging system (1), The Cloud Terrace (2), embedded computer system (3); Thermal imaging system and embedded computer system are arranged on a protective cover and are built on The Cloud Terrace; Embedded computer system receives the thermal-image data from thermal imaging system through digital interface, and thermal imaging system analog image output port exports through The Cloud Terrace; Have Geographic Information System (GIS) in embedded computer system, Geographic Information System (GIS) data is for installing radius 20km area coverage centered by ground, and level line precision is interval <20m; Thermal imaging system digital imagery > 25Hz; The equipment course of work: thermal imaging system imaging is the heat picture of object imaging thing, what imaging described is not color is temperature value, and the temperature being scene at the image of nature scene formation describes; In imaging data, higher than B point 80 degree of A point can conclude A point temperature anomaly, has the focus of doubtful thermoelectricity to be emerged, accuses fire alarm by embedded computer system;
(2) thermal imaging system is connected with embedded computer system, suppose that the data that the imaging resolution M × N of thermal imaging system obtains a two field picture by communication program are can obtain the image being greater than 25 frames matrix A (1) p.s. having M row N capable, the matrix number in like manner obtained also is greater than 25, sequence is A (1), A (2), A (3) ... A(n), n is the frame frequency of thermal imaging system;
(3) Geographic Information System (GIS) is also simultaneously every two field picture M × N matrix A (1) of thermal imaging system imaging, A (2), A (2) ... A(n) distance of corresponding each matrix imaging element is converted to respective distances on the spot according to optical ranging principle and obtains matrix B (1), B (2), B (3) ... B(n);
(4) pass drawing the temperature Wside of target temperature Wobj and the perception of thermal imaging system imaging surface is Wside=k*Wobj, k is that infrared spatial transmits attenuation coefficient, with distance L, real-time humidity S, carbon dioxide (CO2) concentration are correlated with, and calculate according to the correlation formula that LOWTRAN provides.
Can show that real-time humidity is identical with gas concentration lwevel at synchronization, only have different range attenuation coefficients different, according to matrix B (1), B (2), B (3) ... B(n) range data can draw matrix C (1), C (2), C (3) that attenuation coefficient is formed ... C(n).
(5) matrix A (1), A (2), A (3) ... A(n) with C (1), C (2), C (3) ... C(n) be multiplied obtain target temperature formed matrix W (1), W (2), W (3) ... W(n).
(6) each temperature matrices finds out maximum with minimum value, as long as there is the maximum and minimum situation differing alarm conditions 80 degree, alarm prompt, otherwise above step is carried out in circulation.
To the present invention is based on when forest fire alarm fire occurs necessarily that this is true with temperature change, solve long distance measurement temperature thus solve the detection difficult problem based on temperature sensing forest fire alarm fire.Thermographic utilizes ultrared feature exactly, and objects all except absolute black body all gives off thermal energy at infrared spectral range.Infrared ray and visible ray have identical circulation way.Radiation (energy) and temperature are proportional correspondences.Thermal energy passes through light velocity propagation.
The core of invention is: introduce the distance parameter implemented, and Geographic Information System (GIS) is found range the temperature identification error that the distance parameter correction detection range that gets brings, and improves the accuracy of long-range detection temperature.
The present invention uses multinomial technical combinations to solve the following problem of remote temperature measurement:
1), the relation of remote air transmission decay and scene;
2), optical principle is utilized to find range;
3) pixel in Geographic Information System mensuration scene and point of fixity distance, is utilized.
Technique effect of the present invention is: being combined with Geographic Information System by optical ranging achieves the accurate temperature measurement of thermal imaging system, be that the remote practical thermometric of low cost (compared with laser ranging) becomes possibility, provide a kind of new method for thermal imaging realizes medium and long distance thermometric.
Accompanying drawing explanation
Fig. 1 is signal wiring figure of the present invention;
Fig. 2 is thermal imaging system infrared imaging system schematic diagram;
Fig. 3 is thermal imaging system space propagation decay schematic diagram;
Fig. 4 is different object distance focal plane imaging schematic diagram;
Fig. 5 is visual light imaging image;
Fig. 6 is graphic images;
Fig. 7 is range measurement principle schematic diagram.
Embodiment
by best embodiment, the present invention is described in detail below
.
As shown in figs. 1-7, the present invention is by electromechanical integration technology, and optical ranging principle combines with Geographic Information System and corrects thermal imaging system focal plane imaging and have error apart from producing, realizes the detection of thermal imaging system to forest live wire and fire alarm.Investigative range 1-20KM.
As shown in Figure 1, (one) equipment composition: system is made up of thermal imaging system 1, The Cloud Terrace 2, embedded computer system 3.Thermal imaging system and embedded computer system are arranged on a protective cover and are built on The Cloud Terrace; Embedded computer receives the thermal-image data from thermal imaging system through digital interface, and thermal imaging system analog image output port exports through The Cloud Terrace; Have Geographic Information System (GIS) Geographic Information System (GIS) data in embedded computer for installing radius 20km area coverage at the end, ground, level line precision is interval <20m; Thermal imaging system digital imagery > 25Hz;
As shown in Figure 2, the course of work: thermal imaging system imaging is the heat picture of object imaging thing, what imaging described is not color is temperature value, and the temperature being scene at the image of nature scene formation describes; In imaging data, higher than B point 80 degree of A point can conclude A point temperature anomaly, has the focus of doubtful thermoelectricity to be emerged, accuses fire alarm by computing machine.
(2) thermal imaging system is connected with computing machine, suppose that the data that the imaging resolution M5N of thermal imaging system obtains a two field picture by specific communication program are can obtain the image being greater than 25 frames matrix A (1) p.s. having M row N capable, it is A (1), A (2), A (3) that the matrix number in like manner obtained also is greater than 25 sequences ... A(n), n is the frame frequency of thermal imaging system;
(3) Geographic Information System (GIS) is also simultaneously every two field picture M5N matrix A (1) of thermal imaging system imaging, A (2), A (2) ... A(n) distance of corresponding each matrix imaging element is converted to respective distances on the spot according to optical ranging principle and obtains matrix B (1), B (2), B (3) ... B(n);
(4) as seen in figures 3-6, target temperature W is drawn in figure
objwith the temperature W of thermal imaging system imaging surface perception
sidepass be W
side=k*W
objk be infrared spatial transmit attenuation coefficient, and distance L, real-time humidity S, carbon dioxide (CO
2) concentration is correlated with, calculates according to the correlation formula that LOWTRAN provides.
Can show that real-time humidity is identical with gas concentration lwevel at synchronization, only have different range attenuation coefficients different, according to matrix B (1), B (2), B (3) ... B(n) range data can draw matrix C (1), C (2), C (3) that attenuation coefficient is formed ... C(n).
(5) in conjunction with 2), 3), 4) matrix A (1), A (2), A (3) ... A(n) with C (1), C (2), C (3) ... C(n) be multiplied obtain target temperature formed matrix W (1), W (2), W (3) ... W(n).
(6) each temperature matrices finds out maximum with minimum value, as long as there is the maximum and minimum situation differing alarm conditions 80 degree, alarm prompt, otherwise above step is carried out in circulation.
As shown in Figure 7, h: setting height(from bottom); α: position angle (with direct north drift angle) has digital tripod head to obtain; β: the angle of pitch (optical axis horizontal plane angle) digital tripod head obtains; φ: mounting points geographic coordinate longitude; λ: H: mounting points geographic coordinate elevation.
Thermal imaging system 1 and embedded computer 3 are placed in same protective cover by the present invention, and protective cover requires as IP66 level of protection; Be connected by digital interface between thermal imaging system 1 with embedded computer 3 and obtain thermal imaging system real time imagery by software and to practise physiognomy metadata; Protective cover is placed on The Cloud Terrace 2; Embedded computer and The Cloud Terrace are interconnected by RS422, transmit position angle (in horizontal direction) angle and the angle of pitch (in vertical direction) angle in real time; Below jointly a device is formed.The field that this device is arranged on forest zone for observe forest fire fire alarm sightseeing tower on, device peace dress at sightseeing tower highest point, without visual dead angle.The Cloud Terrace provides electric power to thermal imaging system and embedded computer.Other networks pre-are connected by The Cloud Terrace peace by this device, by network, positional information when image and alarm prompt and realtime graphic are delivered to network and can reach place (fireproofing management department) practical function object.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (1)
1. thermal imaging is used for the focus of forest fire protection and fire point detection method, it is characterized in that, introduces real-time distance parameter, and Geographic Information System (GIS) is found range the temperature identification error that the distance parameter correction detection range that gets brings; Specifically comprise:
(1) equipment composition: system is made up of thermal imaging system (1), The Cloud Terrace (2), embedded computer system (3); Thermal imaging system and embedded computer system are arranged on a protective cover and are built on The Cloud Terrace; Embedded computer system receives the thermal-image data from thermal imaging system through digital interface, and thermal imaging system analog image output port exports through The Cloud Terrace; Have Geographic Information System (GIS) in embedded computer system, Geographic Information System (GIS) data is the information to install the radius 20km area coverage centered by ground, and level line precision is interval <20m; Thermal imaging system digital imagery > 25Hz; The equipment course of work: thermal imaging system imaging is the heat picture of object imaging thing, what imaging described is not color is temperature value, and the temperature being scene at the image of nature scene formation describes; In imaging data, higher than B point 80 degree of A point can conclude A point temperature anomaly, has the focus of doubtful fire point to be emerged, accuses fire alarm by embedded computer system;
(2) thermal imaging system is connected with embedded computer system, suppose that the data that the imaging resolution M × N of thermal imaging system obtains a two field picture by communication program are can obtain the image being greater than 25 frames matrix A (1) p.s. having M row N capable, the matrix number in like manner obtained also is greater than 25, sequence is A (1), A (2), A (3) ... A(n), n is the frame frequency of thermal imaging system;
(3) Geographic Information System (GIS) is also simultaneously every two field picture M × N matrix A (1) of thermal imaging system imaging, A (2), A (2) ... A(n) distance of corresponding each matrix imaging element is converted to respective distances on the spot according to optical ranging principle and obtains matrix B (1), B (2), B (3) ... B(n);
(4) show that the pass of the temperature Wside of target temperature Wobj and the perception of thermal imaging system imaging surface be Wside=k*Wobj, k is that infrared spatial transmits attenuation coefficient, and distance L, real-time humidity S, carbon dioxide (CO
2) concentration is correlated with, calculates according to the correlation formula that LOWTRAN provides;
Can show that real-time humidity is identical with gas concentration lwevel at synchronization, only have different range attenuation coefficients different, according to matrix B (1), B (2), B (3) ... B(n) range data can draw matrix C (1), C (2), C (3) that attenuation coefficient is formed ... C(n);
(5) matrix A (1), A (2), A (3) ... A(n) with C (1), C (2), C (3) ... C(n) be multiplied obtain target temperature formed matrix W (1), W (2), W (3) ... W(n);
(6) each temperature matrices finds out maximum with minimum value, as long as there is the maximum and minimum situation differing alarm conditions 80 degree, alarm prompt, otherwise above step is carried out in circulation.
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| CN105676884B (en) * | 2016-01-27 | 2018-09-25 | 武汉天木林科技有限公司 | A kind of device and method that infrared thermal imaging search and track aims at |
| CN107808412A (en) * | 2017-11-16 | 2018-03-16 | 北京航空航天大学 | A kind of three-dimensional thermal source environmental model based on low cost determines environmental information method |
| CN108664926B (en) * | 2018-05-10 | 2021-07-30 | 中南林业科技大学 | Method for identifying cloud layer reflection false hot spot on forest fire satellite monitoring |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0682330A1 (en) * | 1994-05-09 | 1995-11-15 | Matsushita Electric Industrial Co., Ltd. | Detecting apparatus and measuring method of warm object |
| CN101673448A (en) * | 2009-09-30 | 2010-03-17 | 青岛科恩锐通信息技术有限公司 | Method and system for detecting forest fire |
| CN101854846A (en) * | 2007-06-25 | 2010-10-06 | 真实成像有限公司 | Method, device and system for thermography |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0682330A1 (en) * | 1994-05-09 | 1995-11-15 | Matsushita Electric Industrial Co., Ltd. | Detecting apparatus and measuring method of warm object |
| CN101854846A (en) * | 2007-06-25 | 2010-10-06 | 真实成像有限公司 | Method, device and system for thermography |
| CN101673448A (en) * | 2009-09-30 | 2010-03-17 | 青岛科恩锐通信息技术有限公司 | Method and system for detecting forest fire |
Non-Patent Citations (1)
| Title |
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| 基于 GIS 和视频监控的森林防火指挥决策系统研建;张永贺 等;《亚热带资源与环境学报》;20120930;第7卷(第3期);第44-54页 * |
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Effective date of registration: 20150915 Address after: 150000 Heilongjiang Province, Harbin city Nangang District Chunlong Road No. 14 room 603 Applicant after: Bao Pengfei Address before: 603 room 1, building 99, 150090, Huashan Road, Heilongjiang Road, Nangang concentration zone, Harbin Development Zone, China Applicant before: Harbin Baoliang Kairui Technology Development Co., Ltd. Applicant before: Bao Pengfei |
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