CN103455804A - Electric transmission line forest fire satellite fire point distinguishing method based on dynamic threshold - Google Patents
Electric transmission line forest fire satellite fire point distinguishing method based on dynamic threshold Download PDFInfo
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- CN103455804A CN103455804A CN2013104211755A CN201310421175A CN103455804A CN 103455804 A CN103455804 A CN 103455804A CN 2013104211755 A CN2013104211755 A CN 2013104211755A CN 201310421175 A CN201310421175 A CN 201310421175A CN 103455804 A CN103455804 A CN 103455804A
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Abstract
The invention discloses an electric transmission line forest fire satellite fire point distinguishing method based on a dynamic threshold. The method comprises the following steps of receiving MODIS infrared satellite data, generating a three-channel composite picture, determining and distinguishing open flame fire points, determining and distinguishing fire points through a dynamic threshold method, removing industrial and urban fire point information, removing fire point information beyond a 5km distance range of an electric transmission line, and obtaining forest fire point information of the electric transmission line. The method eliminates side effects on fire point recognition in different seasons and different moments, eliminates effects of different areas on the fire point recognition, improves the accuracy of the fire point recognition of the electric transmission line, can timely publish electric transmission line forest fire alarm information to enable people to take measures in advance and reduces the power grid loss caused by forest fire to the maximum limit.
Description
Technical field
The invention belongs to the electrical engineering technical field, relate to a kind of transmission line forest fire satellite based on dynamic threshold fire point discrimination method, be applicable near mountain fire transmission line of electricity automatically, discrimination method fast and accurately.
Background technology
In recent years, along with global warming, extreme climate weather frequently occurs, and China's ALFISOL IN CENTRAL, between spring ploughing and lucid interval, the continuous high temperature sunny weather more and more easily occurs.Simultaneously due to economic development, rural area fuel is substituted by combustion gas by traditional withered grass and trees, add the enforcement of conceding the land to forestry policy, vegetation keeps more and more intact to the area, mountain area, so, near transmission line of electricity, the mountain fire frequency presents a rapidly rising trend, and the number of times that tripping operation occurs because of mountain fire also obviously increases.Even the mountain fire trip accident, as Shanxi Chang Nan line, also once occurred, the safe and stable operation of serious threat electrical network in extra high voltage line.And the monitoring of traditional transmission line forest fire satellite fire point, the general absolute threshold method that adopts, the i.e. abbreviation of the English full name of the infrared channel MODIS(in the infrared monitoring satellite " moderate-resolution imaging spectroradiometer ", Chinese translation is " Moderate Imaging Spectroradiomete ".) serial satellite is generally when the 21st passage is greater than certain absolute threshold and is judged as fiery point, there is following defect in the method: (1) easily is subject to the impact of cloud layer, bare area and the water surface, causes the erroneous judgement of fire point; (2) impact that changed by seasonal variations, surface temperature, cause the erroneous judgement of fire point; (3) affected by urban heat land effect, cause the erroneous judgement of fire point.
Summary of the invention
The technical problem to be solved in the present invention is, defect for prior art, a kind of transmission line forest fire satellite fire point discrimination method based on dynamic threshold is provided, use the method can be automatically, the satellite fire point of identification transmission line forest fire quickly and accurately, farthest avoid erroneous judgement, thereby can issue in time the transmission line forest fire alarm, instruct near the mountain fire preventing and controlling of transmission line of electricity, avoid the transmission line of electricity trip accident occurred because of mountain fire, guarantee power network safety operation.
Technical scheme of the present invention is, a kind of transmission line forest fire satellite fire point discrimination method based on dynamic threshold provided, at first system synthesizes the RGB picture according to the 7th passage, the 2nd passage, the 1st passage of the infrared satellite monitoring data of MODIS, utilizes the qualitative identification of bright red spot of Image Display to fire a little.Then utilize in the 21st channel value of all fiery dot informations minimum value as threshold value, concrete coordinate and burnt area that recycling threshold method Quantitative fires a little, according to the transmission line of electricity geographic information data, rejecting is positioned at fire point and the extraneous fiery point of transmission line of electricity 5km along the line in manufacturing district and city, obtains transmission line forest fire fire dot information.Particularly, the method comprises the steps:
(1), receive the infrared satellite data of MODIS.The infrared satellite receiver of MODIS is set, utilizes the Monitoring Data of the infrared satellite of this device reception MODIS, the data of 36 passages altogether that each pixel of the infrared satellite of MODIS contains;
(2), generate the triple channel synthesising picture.The 7th passage of the infrared satellite of MODIS that step (1) is received is given redness, the 2nd passage is given green, the 1st passage is given blueness, uses conventional method, will give the 7th red passage and give the 2nd green passage, gives the 1st blue passage and generate the colored synthesising picture of triple channel;
(3), the qualitative identification of naked light fire point.On the triple channel synthesising picture generated in step (2), find out the fiery red pixel of putting of naked light that all expressions are being burnt.Use conventional method to calculate the minimum value T of the 21st channel value of all red pixels
0.This minimum value T
0for the dynamic change value.Different regions, Various Seasonal and not in the same time, minimum value T
0difference, but be presented on the triple channel synthesising picture, be bright red spot;
(4), dynamic thresholding method fire point Quantitative.Utilize the obtained dynamic minimum value T of step (3)
0as the dynamic threshold of the 21st passage, the 21st channel value T of the described red pixel of step (3)
21while meeting the following conditions:
T
21≥T
0
The bright red spot be presented in discriminating step (3) on the triple channel synthesising picture is naked light fire point, and exportable fire point geographic coordinate and fire point area, and this fire point area is directly proportional with the fire point pixel number be connected;
(5), reject industry and city fire dot information.Industry and urban geographic information coordinate in finding out the transmission line of electricity Geographic Information System in the infrared satellite data of MODIS received in step (1), utilize this coordinate to reject and drop on the fiery dot information within manufacturing district and metropolitan district;
(6), reject the outer fiery dot information of transmission line of electricity 5km distance range along the line.Find out the transmission line of electricity Geographic Information System in the infrared satellite data of MODIS received in step (1), utilize 220kV and the above geography information along 5km place, transmission line of electricity both sides in this system, reject the along both side outer fiery dot information of 5km distance range of transmission line of electricity;
(7), draw transmission line forest fire fire dot information.Check step (5)～(6) institute ember dot information, draw and affect the potential risk of transmission line of electricity safe and stable operation transmission line forest fire fire dot information.
The invention has the beneficial effects as follows:
1, utilize the 21st passage minimum value of the red pixel of triple channel synthesising picture, ingeniously eliminated Various Seasonal and not in the same time to the adverse effect of fire point identification;
2, utilize the transmission line of electricity Geographic Information System (GIS) data, effectively eliminated the impact of different regions on the identification of fire point;
3, greatly improved transmission line of electricity forest fire accuracy rate;
4, solved the difficult problem of transmission line forest fire fire point monitoring.According to the transmission line of electricity fire point of monitoring out, can issue in time the transmission line forest fire warning information, before occurring, mountain fire tripping operation prerequisite carries out counter-measure, reduce to greatest extent the loss that mountain fire causes to electrical network.
Embodiment
Embodiment 1:
(1), receive the infrared satellite data of MODIS.The infrared satellite receiver of MODIS is set, utilizes this device to receive the Monitoring Data of the infrared satellite of MODIS;
(2), generate the triple channel synthesising picture.The 7th passage of the infrared satellite of MODIS that step (1) is received, the 2nd passage is given green, the 1st passage is given blueness, uses conventional method, will give the 7th red passage and give the 2nd green passage, gives the 1st blue passage and generate the colored synthesising picture of triple channel;
(3), the qualitative identification of naked light fire point.On the triple channel synthesising picture generated in step (2), find out the fiery red pixel of putting of naked light that all expressions are being burnt.Use conventional method to calculate the minimum value T of the 21st channel value of all red pixels
0;
(4), dynamic thresholding method fire point Quantitative.Utilize the obtained dynamic minimum value T of step (3)
0as the dynamic threshold of the 21st passage, the 21st channel value T of the described red pixel of step (3)
21while meeting the following conditions:
T
21≥T
0
The bright red spot be presented in discriminating step (3) on the triple channel synthesising picture is naked light fire point;
(5), reject industry and city fire dot information.Industry and urban geographic information coordinate in finding out the transmission line of electricity Geographic Information System in the infrared satellite data of MODIS received in step (1), utilize this coordinate to reject and drop on the fiery dot information within manufacturing district and metropolitan district;
(6), reject the outer fiery dot information of transmission line of electricity 5km distance range along the line.Find out the transmission line of electricity Geographic Information System in the infrared satellite data of MODIS received in step (1), utilize 220kV and the above geography information along 5km place, transmission line of electricity both sides in this system, reject the along both side outer fiery dot information of 5km distance range of transmission line of electricity;
(7), draw transmission line forest fire fire dot information.Check step (5)～(6) institute ember dot information, draw and affect the potential risk of transmission line of electricity safe and stable operation transmission line forest fire fire dot information.
Embodiment 2:
Step (1)～(3) are with embodiment 1;
(4), dynamic thresholding method fire point Quantitative.Utilize the obtained dynamic minimum value T of step (3)
0as the dynamic threshold of the 21st passage, the 21st channel value T of the described red pixel of step (3)
21while not meeting the following conditions:
T
21≥T
0
The bright red spot be presented in discriminating step (3) on the triple channel synthesising picture is not all naked light fire point.Step leaves it at that.
Claims (1)
1. the transmission line forest fire satellite fire based on dynamic threshold is put discrimination method, and the method comprises the steps:
(1), receive the infrared satellite data of MODIS, the infrared satellite receiver of MODIS is set, utilize the Monitoring Data of the infrared satellite of this device reception MODIS;
(2), triple channel synthesising picture, the 7th passage of the infrared satellite of MODIS that step (1) is received is given redness, the 2nd passage is given green, the 1st passage is given blueness, use conventional method, will give the 7th red passage and give the 2nd green passage, give the 1st blue passage and generate the colored synthesising picture of triple channel;
(3), the qualitative identification of naked light fire point, on the triple channel synthesising picture generated in step (2), find out the red pixel of the naked light fire point that all expressions are burning, use conventional method to calculate the minimum value T of the 21st channel value of all red pixels
0;
(4), dynamic thresholding method fire point Quantitative, utilize the obtained dynamic minimum value T of step (3)
0as the dynamic threshold of the 21st passage, the 21st channel value T of the described red pixel of step (3)
21while meeting the following conditions:
T
21≥T
0
The bright red spot be presented in discriminating step (3) on the triple channel synthesising picture is naked light fire point;
(5), reject industry and city fire dot information, industry and urban geographic information coordinate in finding out the transmission line of electricity Geographic Information System in the infrared satellite data of MODIS received in step (1), utilize this coordinate to reject and drop on the fiery dot information within manufacturing district and metropolitan district;
(6), reject the outer fiery dot information of transmission line of electricity 5km distance range along the line, find out the transmission line of electricity Geographic Information System in the infrared satellite data of MODIS received in step (1), utilize 220kV and the above geography information along 5km place, transmission line of electricity both sides in this system, reject the along both side outer fiery dot information of 5km distance range of transmission line of electricity;
(7), draw transmission line forest fire fire dot information, check step (5)～(6) institute ember dot information, draw and affect the fiery dot information of the potential risk of transmission line of electricity safe and stable operation transmission line forest fire.
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Cited By (12)
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| CN103942912A (en) * | 2014-05-09 | 2014-07-23 | 国家电网公司 | Power transmission line mountain fire fine positioning method based on brightness temperature value analysis |
| CN104112327A (en) * | 2014-07-09 | 2014-10-22 | 国家电网公司 | Multi-pixel fire point correction method for power transmission line wildfire satellite monitoring |
| CN104236616A (en) * | 2014-10-11 | 2014-12-24 | 国家电网公司 | Monitoring and testing method for electric-transmission-line mountain fire satellite monitoring system |
| CN104537792A (en) * | 2014-12-26 | 2015-04-22 | 浙江大学 | Transmission line wildfire satellite monitoring method based on background information |
| CN105740642A (en) * | 2016-03-14 | 2016-07-06 | 国家电网公司 | MODIS satellite fire point accuracy distinguishing method based on multi-source remote sensing data |
| CN105761408A (en) * | 2016-04-25 | 2016-07-13 | 国网湖南省电力公司 | Dynamic threshold monitoring method of power transmission line mountain fire satellite and system thereof |
| CN106297142A (en) * | 2016-08-17 | 2017-01-04 | 云南电网有限责任公司电力科学研究院 | A kind of unmanned plane mountain fire exploration control method and system |
| CN108229738A (en) * | 2017-12-29 | 2018-06-29 | 国网湖南省电力有限公司 | Transmission line of electricity satellite mountain fire monitors and method, system and the storage medium of secondary harm fire point statistics |
| CN109509319A (en) * | 2018-12-29 | 2019-03-22 | 北京恒泰实达科技股份有限公司 | Transmission line forest fire monitoring and pre-alarming method based on fixed statellite monitoring materials |
| CN110009031A (en) * | 2019-03-29 | 2019-07-12 | 云南电网有限责任公司电力科学研究院 | A kind of satellite mountain fire fire point postsearch screening method based on multi- source Remote Sensing Data data |
| CN111858813A (en) * | 2020-07-21 | 2020-10-30 | 云南电网有限责任公司带电作业分公司 | Non-fire area eliminating method based on satellite technology |
| CN112562244A (en) * | 2020-12-03 | 2021-03-26 | 广东电网有限责任公司电力科学研究院 | Power transmission line forest fire identification method and system |
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| CN103942912A (en) * | 2014-05-09 | 2014-07-23 | 国家电网公司 | Power transmission line mountain fire fine positioning method based on brightness temperature value analysis |
| CN103942912B (en) * | 2014-05-09 | 2015-04-15 | 国家电网公司 | Power transmission line mountain fire fine positioning method based on brightness temperature value analysis |
| WO2015169162A1 (en) * | 2014-05-09 | 2015-11-12 | 国家电网公司 | Power transmission line wildfire fine positioning method based on brightness temperature value analysis |
| CN104112327A (en) * | 2014-07-09 | 2014-10-22 | 国家电网公司 | Multi-pixel fire point correction method for power transmission line wildfire satellite monitoring |
| CN104236616A (en) * | 2014-10-11 | 2014-12-24 | 国家电网公司 | Monitoring and testing method for electric-transmission-line mountain fire satellite monitoring system |
| CN104236616B (en) * | 2014-10-11 | 2015-08-19 | 国家电网公司 | A kind of transmission line forest fire satellite monitoring system monitoring test method |
| CN104537792A (en) * | 2014-12-26 | 2015-04-22 | 浙江大学 | Transmission line wildfire satellite monitoring method based on background information |
| CN105740642B (en) * | 2016-03-14 | 2018-11-13 | 国家电网公司 | MODIS fire satellite fire point accuracy method of discrimination based on multi- source Remote Sensing Data data |
| CN105740642A (en) * | 2016-03-14 | 2016-07-06 | 国家电网公司 | MODIS satellite fire point accuracy distinguishing method based on multi-source remote sensing data |
| CN105761408A (en) * | 2016-04-25 | 2016-07-13 | 国网湖南省电力公司 | Dynamic threshold monitoring method of power transmission line mountain fire satellite and system thereof |
| CN105761408B (en) * | 2016-04-25 | 2017-08-04 | 国网湖南省电力公司 | The dynamic threshold monitoring method and system of transmission line forest fire satellite |
| CN106297142A (en) * | 2016-08-17 | 2017-01-04 | 云南电网有限责任公司电力科学研究院 | A kind of unmanned plane mountain fire exploration control method and system |
| CN108229738A (en) * | 2017-12-29 | 2018-06-29 | 国网湖南省电力有限公司 | Transmission line of electricity satellite mountain fire monitors and method, system and the storage medium of secondary harm fire point statistics |
| CN109509319A (en) * | 2018-12-29 | 2019-03-22 | 北京恒泰实达科技股份有限公司 | Transmission line forest fire monitoring and pre-alarming method based on fixed statellite monitoring materials |
| CN110009031A (en) * | 2019-03-29 | 2019-07-12 | 云南电网有限责任公司电力科学研究院 | A kind of satellite mountain fire fire point postsearch screening method based on multi- source Remote Sensing Data data |
| CN110009031B (en) * | 2019-03-29 | 2023-09-01 | 云南电网有限责任公司电力科学研究院 | Satellite mountain fire point secondary screening method based on multi-source remote sensing data |
| CN111858813A (en) * | 2020-07-21 | 2020-10-30 | 云南电网有限责任公司带电作业分公司 | Non-fire area eliminating method based on satellite technology |
| CN112562244A (en) * | 2020-12-03 | 2021-03-26 | 广东电网有限责任公司电力科学研究院 | Power transmission line forest fire identification method and system |
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