EP0458938B1 - Fire fighting system mainly conceived to safeguard forests - Google Patents

Fire fighting system mainly conceived to safeguard forests Download PDF

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Publication number
EP0458938B1
EP0458938B1 EP91901284A EP91901284A EP0458938B1 EP 0458938 B1 EP0458938 B1 EP 0458938B1 EP 91901284 A EP91901284 A EP 91901284A EP 91901284 A EP91901284 A EP 91901284A EP 0458938 B1 EP0458938 B1 EP 0458938B1
Authority
EP
European Patent Office
Prior art keywords
data
peripheral
fire
fire fighting
fighting system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91901284A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0458938A1 (en
Inventor
Giulio Brogi
Luca Pietranera
Francesco Frau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leonardo SpA
Original Assignee
Selenia Industrie Elettroniche Associate SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Selenia Industrie Elettroniche Associate SpA filed Critical Selenia Industrie Elettroniche Associate SpA
Publication of EP0458938A1 publication Critical patent/EP0458938A1/en
Application granted granted Critical
Publication of EP0458938B1 publication Critical patent/EP0458938B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/005—Fire alarms; Alarms responsive to explosion for forest fires, e.g. detecting fires spread over a large or outdoors area
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
    • G08B17/125—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions by using a video camera to detect fire or smoke

Definitions

  • the invention presented regards an integrated system which is particularly well suited for the safeguard of wooded areas against fires.
  • the invention refers to a fire fighting system, mainly intend for the safeguard of wooded areas, for raising a fire alarm
  • a peripheral detection station including an infrared sensor for detecting a given surveyed area, which infrared sensor measures the radiation flow coming from a small angular region of said area, rotating means supporting the infrared sensor, which confers an azimuth scan to the infrared sensor, a local processor which acquires data from the infrared sensor and manages data exchange with a local control centre, from which it receives commands, a peripheral station communications subsystem provides for transmission of data to the local control centre; and said local control center including a communications subsystem which receives the data sent by said peripheral station communications subsystem and emits said commands for controlling of the local processor, a peripheral memory unit for recording of data, a central processor which controls the peripheral detection station, controls the exchange of commands and data, illustrates the notified alarm on topographic maps of the area, records data on said peripheral memory unit, displays system status and integrates the notified alarm with data
  • a peripheral station is equipped with some TV infrared cameras. The cameras can rotate over a 180° angle in the azimuthal plane. The peripheral station is connected via a microwave radio link and a bidirectional UHF radio link to a control station, where the whole surveillance operation takes place.
  • the processor can not integrates the received alarm with the current and historical weather data. For that reason there is no possibility to calculate a fire propagation model with information about propagation speed and direction of the fire.
  • the scope of this invention is therefore a system which offers automatic monitoring of fires and which calculates a fire propagation model.
  • the utilisation of infrared sensors and of all the devices which form the system, are noteworthy step ahead in the safeguard of wooded areas, till present trusted to towers and look out personnel.
  • the fire fighting system is characterised in that the local processor of the peripheral detection station further acquires data from means for collecting current weather data included in the peripheral detection station, provides for extraction of fire alarm and causes the transmission of the alarm signal and the weather data to the local control centre via the communications subsystems, and in that the central processor of the local control centre further integrates the alarm extracted by said peripheral detection station with instantaneous weather data and with data of the historical data bank further containing information on recent weather conditions, as to develop a fire propagation model as a function of said integration, whereby the model is based upon the instantaneous weather data, the vegetation distribution, and the recent weather conditions, resulting in a propagation speed and direction of the fire.
  • the system of the invention so consists of two sub assemblies: the remote detector and the local control centre. More than one detector can be connected to the local control centre, in quantities from 5 to 10.
  • the invention will now be decribed with reference to the tables of drawings attached.
  • Figure 1 shows the block diagram of the entire system, where the arrows stand for the connections among the units of the system:
  • FIG. 2 is a schematic representation of the peripheral detector, indicated as block 1 in figure 1. Here we can see:
  • the remote detector consists of:
  • An infrared sensor 10 which has a spectral sensitivity such as to provide an optimum detection of hot sources (300-700 degrees C) against an ambient temperature background (0-40 degrees C).
  • a spectral sensitivity such as to provide an optimum detection of hot sources (300-700 degrees C) against an ambient temperature background (0-40 degrees C).
  • a group of weather sensors 14 which provide data on temperature, relative humidity, pressure, wind speed and direction, solar radiation and rain rate.
  • a TV camera 11 for possible visual monitoring of the surveilled area.
  • a motor driven platform 12 which confers an azimuth scan to the infrared sensor and to the TV camera over 360 degrees.
  • a processor 13 which acquires data from the infrared sensor and provides for extraction of possible alarms, acquires weather sensor data, manages data exchange with the local control centre, from which it receives all commands.
  • the infrared sensor data processing is based upon the following procedure: The infrared sensor measures the radiation flow coming from a small angular region, such as 1 degree x 1 degree; the vertical coverage of the sensor is 15 to 20 degrees and is obtained by means of a linear array of sensitive elements. All data coming from a detector is taken into account: in our case taken as an example, there are 360 datum points, one per azimuth degree covered. The number of data may be less if the area to be monitored is only part of a whole round angle.
  • the processor calculates the value of the derivative of the signal. This provides for the elimination of the signal long term changing effects, on an angle scale of 10 degrees for instance.
  • Such variations are typically due to the variation of the angle between the line of sight of the sensor and the position of the sun.
  • the processor then extracts the mean square value of the fluctuations of the signal subject to derivation for each group of data corresponding to a vertical position which we shall call line.
  • Such value is proportional to the fluctuations of the background on the line itself and, multiplied by a suitable constant value, it is taken as a threshold for the detection of possible signals.
  • the processor Based upon the threshold determined above, the processor identifies any signal present above such threshold on a line basis. The azimuth angle of the signal is compared with that of signals detected in the previous scans. This is necessary to confer a better reliability to the alarm through a number of consecutive confirmed appearances.
  • an alarm is taken as true and therefore transmitted to the local control centre only if it has received a number of confirmations greater than or equal to two in four successive scans.
  • a communications system 15 such as a radio link remotely controlled by the processor, provides for digital transmission of detected alarms detected by the IR sensor, of weather data and of the TV image to the local control centre.
  • the local control centre consists of the following:
  • One or more processors with the following functions:
  • the function provided by the program may be performed during operation of the fire fighting system (called in the following on line functions) or separately (off line).
  • the main functions performed by the program are the following: Digitising of topographic and thematic maps.
  • the data which is available from this digitising are the substrate absolutely necessary for the visualization of alarms on the monitor display of the processor and for the development of the forecast algorithms of the fire development.
  • Peripheral management This function preferably used off line transports onto paper the graphics displayed on the monitor; this is the documentation required by the fire fighting squads.
  • Intervisibility management which is performed between any point of the map and one of the peripheral detection stations. This function is used mostly during setting up of the system and it guides in the selection of the best sighting of the peripheral detectors.
  • Forecast of the fire development is based upon the speed and direction of the wind, on ground gradient and type of fuel, resulting in a propagation speed of the fire as a function of absolute azimuth against north.
  • the algorithm adopted utilises the following parameters:
  • the program provides a graphic output overlayed on the digitised topographic map showing the successive positions of the fire front edge at pre established time intervals.
  • the data which is detected by the infrared sensor 10 are acquired and processed by local processor 13.
  • One of the tasks of the processor is also the management of rotating platform 12 onto which the IR sensor and the TV camera 11 are fitted.
  • the processor transmits the position of any possible fire together with weather data by means of the communications system 15.
  • the TV camera transmits images directly to the local control centre by means of the communications system.
  • the data coming from the peripheric detection station 1 is sorted by the communications subsystem 2.
  • the TV video is visualized on monitor 6 and can also be recorded 7.
  • the infrared sensor data regarding the position of any alarm is fed to processor 3 which places them on the topographic maps.
  • the modelling program 4 develops a forecast of the fire evolution in the hours following detections, relying upon historic, weather, vegetation and other data contained in data bank 5.
  • the weather data acquired in the last scan are inserted in the data bank.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Multimedia (AREA)
  • Engineering & Computer Science (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
EP91901284A 1989-12-20 1990-12-19 Fire fighting system mainly conceived to safeguard forests Expired - Lifetime EP0458938B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT4868689 1989-12-20
IT04868689A IT1237262B (it) 1989-12-21 1989-12-21 Sistema antincendio prevalentemente concepito per la salvaguardia dei boschi.
PCT/EP1990/002244 WO1991009390A1 (en) 1989-12-20 1990-12-19 Fire fighting system mainly conceived to safeguard forests

Publications (2)

Publication Number Publication Date
EP0458938A1 EP0458938A1 (en) 1991-12-04
EP0458938B1 true EP0458938B1 (en) 1996-08-28

Family

ID=11268042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91901284A Expired - Lifetime EP0458938B1 (en) 1989-12-20 1990-12-19 Fire fighting system mainly conceived to safeguard forests

Country Status (11)

Country Link
EP (1) EP0458938B1 (it)
AT (1) ATE142039T1 (it)
BR (1) BR9007134A (it)
CA (1) CA2047190C (it)
DE (1) DE69028296T2 (it)
ES (1) ES2094807T3 (it)
GR (1) GR3021588T3 (it)
IT (1) IT1237262B (it)
PT (1) PT96268B (it)
TN (1) TNSN90156A1 (it)
WO (1) WO1991009390A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106355811A (zh) * 2016-07-22 2017-01-25 河南城建学院 一种电气火灾监测系统

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9216811D0 (en) * 1992-08-07 1992-09-23 Graviner Ltd Kidde Flame detection methods and apparatus
SG84488A1 (en) * 1992-10-09 2001-11-20 Mutuo Tanaka Remote monitoring unit
ES2070710B1 (es) * 1993-02-10 1997-05-01 Nacional Bazan De Construccion Sistema de vigilancia y deteccion de focos de calor en areas abiertas .
DE9417289U1 (de) * 1994-10-27 1995-01-26 Meinke, Peter, Prof. Dr.-Ing., 82319 Starnberg Detektoreinrichtung, Detektorsystem und Immunosensor zum Erkennen von Bränden
DE19603828A1 (de) * 1996-02-02 1997-08-07 Sel Alcatel Ag Vorrichtung zum Erzeugen eines Alarmes und zur Überwachung eines Gebietes
ES2235605B1 (es) * 2003-06-02 2006-10-16 Universidad Politecnica De Valencia Sistema de vigilancia para la deteccion precoz de incendios.
DE102007007492A1 (de) * 2007-02-15 2008-08-21 Airmatic Gesellschaft für Umwelt und Technik mbH Verfahren zur integrierten, simulationsbasierten Waldbrandbekämpfung
CN102280005B (zh) * 2011-06-09 2014-10-29 广州飒特红外股份有限公司 基于红外热成像技术的森林防火预警系统及方法
CN106997461B (zh) 2017-03-28 2019-09-17 浙江大华技术股份有限公司 一种烟火检测方法及装置
US20240157180A1 (en) 2021-02-04 2024-05-16 Mighty Fire Breaker Llc Method of and kit for installing and operating a wildfire defense spraying system on a property parcel for proactively spraying environmentally-clean liquid fire inhibitor thereover to inhibit fire ignition and flame spread caused by wind-driven wildfire embers
US11865394B2 (en) 2017-12-03 2024-01-09 Mighty Fire Breaker Llc Environmentally-clean biodegradable water-based concentrates for producing fire inhibiting and fire extinguishing liquids for fighting class A and class B fires
US10653904B2 (en) 2017-12-02 2020-05-19 M-Fire Holdings, Llc Methods of suppressing wild fires raging across regions of land in the direction of prevailing winds by forming anti-fire (AF) chemical fire-breaking systems using environmentally clean anti-fire (AF) liquid spray applied using GPS-tracking techniques
US11865390B2 (en) 2017-12-03 2024-01-09 Mighty Fire Breaker Llc Environmentally-clean water-based fire inhibiting biochemical compositions, and methods of and apparatus for applying the same to protect property against wildfire
CN108096752A (zh) * 2017-12-19 2018-06-01 江苏盖亚建筑工程有限公司 一种消防系统
US11826592B2 (en) 2018-01-09 2023-11-28 Mighty Fire Breaker Llc Process of forming strategic chemical-type wildfire breaks on ground surfaces to proactively prevent fire ignition and flame spread, and reduce the production of smoke in the presence of a wild fire
CN111354152A (zh) * 2018-12-24 2020-06-30 北京华航无线电测量研究所 一种火焰检测与定位系统
CN110251861B (zh) * 2019-06-19 2021-02-09 深圳市恒升森林消防装备有限公司 一种森林消防灭火系统
US11911643B2 (en) 2021-02-04 2024-02-27 Mighty Fire Breaker Llc Environmentally-clean fire inhibiting and extinguishing compositions and products for sorbing flammable liquids while inhibiting ignition and extinguishing fire
GR20200100134A (el) * 2020-03-13 2021-10-13 Νικολαος Κωνσταντινου Ζερβος Συστημα εγκαιρου ανιχνευσης και ειδοποιησης πυρκαγιων
CN117854213B (zh) * 2024-01-10 2024-06-04 吉林省林业科学研究院(吉林省林业生物防治中心站) 一种基于气象数据的森林防火监测预警系统及方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0610837B2 (ja) * 1983-03-31 1994-02-09 能美防災株式会社 火災感知装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106355811A (zh) * 2016-07-22 2017-01-25 河南城建学院 一种电气火灾监测系统

Also Published As

Publication number Publication date
PT96268B (pt) 1998-07-31
DE69028296D1 (de) 1996-10-02
CA2047190A1 (en) 1991-06-21
DE69028296T2 (de) 1997-04-24
ATE142039T1 (de) 1996-09-15
IT8948686A0 (it) 1989-12-21
IT8948686A1 (it) 1991-06-21
IT1237262B (it) 1993-05-27
BR9007134A (pt) 1991-12-17
CA2047190C (en) 1999-05-11
TNSN90156A1 (fr) 1991-03-05
GR3021588T3 (en) 1997-02-28
WO1991009390A1 (en) 1991-06-27
EP0458938A1 (en) 1991-12-04
PT96268A (pt) 1992-09-30
ES2094807T3 (es) 1997-02-01

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