CN201435130Y - Fire detection system - Google Patents
Fire detection system Download PDFInfo
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- CN201435130Y CN201435130Y CN2009201055097U CN200920105509U CN201435130Y CN 201435130 Y CN201435130 Y CN 201435130Y CN 2009201055097 U CN2009201055097 U CN 2009201055097U CN 200920105509 U CN200920105509 U CN 200920105509U CN 201435130 Y CN201435130 Y CN 201435130Y
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Abstract
The utility model provides a fire detection system which comprises a monitoring module, a preprocessing module, a control module, a fire judgment module and a first alarm module, wherein the monitoring module is used for obtaining fire monitoring information of the preset protection zone and comprises a camera with variable view fields; the preprocessing module is connected with the monitoring module, and used for analyzing and processing fire monitoring information to obtain a suspected fire occurring zone in the preset protection zone; the control module is connected with the preprocessing module and the camera with variable view fields, and is used for controlling the camera with variable view fields to obtain close-range images of the suspected fire occurring zone; the fire judgment module is connected with the camera with variable view fields, and is used for judging whether fire occurs in the preset protection zone according to the close-range images of the suspected fire occurring zone and obtaining the judgment result; and the first alarm module is connected with the fire judgment module, and is used for outputting alarm information when the judgment result shows that fireoccurs in the preset protection zone. The fire detection system can automatically obtain close-range images of fire occurring zone.
Description
Technical field
The utility model relates to the security against fire monitoring technology, relates in particular to a kind of fire detecting system.
Background technology
Along with the continuous development of social economy, civilization, the trend of global warming is accelerated growth thereupon also in recent years, and the main cause of global warming is because CO
2Deng a large amount of dischargings of gas, 20% CO there is according to statistics every year
2Gaseous emission be because fire, especially the fire of large space such as forest, warehouse causes.The early detection problem of large space fire is difficult to successfully manage, and has satellite-based fire detecting system in the prior art, is used to survey the fire of large space, yet this kind system needs fire development just can detect under the condition of certain scale.
At present, be applied to the early fire detection of large space gradually based on the fire detecting system of image.Do not rely on some physical parameters of fire based on the fire detecting system of image, for example temperature, rate of temperature change, light extinction rate, UV (Ultraviolet Ray, ultraviolet) or IR (Infrared Ray, infrared ray) etc., but the visible features parameter by one or more fire in the recognition image, for example color, flicker, texture, dim light, frequency etc., and the various features parameter combined, by a decision-making mechanism, determine whether breaking out of fire.In general, the fire detecting system based on image has suitable advantage at the aspects such as detection in the place (for example forest, tunnel etc.) that large space fire early detection, fire physical features anomaly develop.
Yet, also there are some problems in fire detecting system based on image, for example, the covering visual field of system is subjected to restriction, the sensitivity of camera performance to be subjected to detection range restriction etc., for instance, for having imaging size is 1/3 " CCD (Charge Coupled Device; charge-coupled image sensor) and focal length be the fixedly visual field video camera of the camera lens of 8mm; its level covers field of view angle and has only 32 degree; that is to say, intactly protect a certain zone of protection often to need fixedly visual field camera chain of some covers; In addition, because the onesize imaging size of object on CCD is inversely proportional to distance, therefore, fire visible features in the image nearby that gets access to is obvious, fire visible properties in the image of the distant place that gets access to may just can't be discerned, the detection range of system is restricted, and sensitivity reduces along with the increase of distance.
Certainly, also have at present and adopt The Cloud Terrace to drive the system that video camera 360 degree rotations are surveyed the fire of large space, say on this Systems Theory and can cover very big field range, yet also there are some problems in it, promptly can only adopt fixed focal length to obtain the image of zone of protection, perhaps can only can't adjust the image that focal length obtains zone of protection as requested automatically by the artificial focal length of adjusting.
The utility model content
In view of this, the utility model embodiment provides a kind of fire detecting system, can obtain the close shot image of fire generation area automatically.
For addressing the above problem, the utility model embodiment provides a kind of fire detecting system, comprising:
Be used to obtain the monitor module of the fire monitor message of presetting zone of protection, described monitor module comprises the variable field of view video camera;
Be used for described fire monitor message is carried out analyzing and processing, obtain the pretreatment module of the doubtful fire generation area in the described default zone of protection, be connected with described monitor module;
Be used to control the control module that described variable field of view video camera obtains the close shot image of described doubtful fire generation area, be connected with described variable field of view video camera with described pretreatment module;
Be used for close shot image, judge the whether breaking out of fire of described default zone of protection, and obtain the fire judge module of a judged result, be connected with described variable field of view video camera according to described doubtful fire generation area;
Be used for when described judged result is indicated described default zone of protection breaking out of fire, first alarm module of output alarm information is connected with described fire judge module.
Described monitor module only comprises described variable field of view video camera.
Described monitor module also comprises:
At least one is used to obtain the fixedly visual field video camera of the initial monitoring picture of described default zone of protection.
Described fire detecting system also comprises:
Be used to store the field coverage of described variable field of view video camera and described fixedly visual field video camera or the local field of view coverage coupling rotational angle when consistent, and first memory module of the initial focal length enlargement factor of described variable field of view video camera, with the rotational angle and the initial focal length enlargement factor that specifically are used for according to described variable field of view video camera, control the control module connection that described variable field of view video camera obtains the close shot image of described doubtful fire generation area.
Described fixedly visual field video camera and the initial monitoring picture of the described default zone of protection that specifically is used for obtaining and the close shot image of described doubtful fire generation area according to described fixedly visual field video camera and described variable field of view video camera, judge the whether breaking out of fire of described default zone of protection, and the fire judge module that obtains a judged result connects.
Described fire detecting system also comprises:
Be used to obtain the meteorology of described default zone of protection or the meteorology of environmental parameter information/environmental parameter sensor;
Described fire judge module comprises:
Be used for meteorology or environmental parameter information according to described default zone of protection, the initial monitoring picture of the described default zone of protection that described fixedly visual field video camera and described variable field of view video camera are obtained and the close shot image of described doubtful fire generation area compensate and revise, the image pretreatment unit of the image after obtaining handling is connected with described variable field of view video camera with described meteorology/environmental parameter sensor, described fixedly visual field video camera;
Be used for according to the image after the described processing, judge the whether breaking out of fire of described default zone of protection, and obtain the fire judging unit of a judged result, be connected with described image pretreatment unit.
Described monitor module also comprises:
At least one is used to survey the fire detector of the doubtful fire characteristic information of described default zone of protection.
Described fire detecting system also comprises:
Be used to store the investigative range of described variable field of view video camera and the described fire detector rotational angle when consistent, and second memory module of the initial focal length enlargement factor of described variable field of view video camera, with the rotational angle and the initial focal length enlargement factor that specifically are used for according to described variable field of view video camera, control the control module connection that described variable field of view video camera obtains the close shot image of described doubtful fire generation area.
Described fire detecting system also comprises:
Whether the target object of the close shot image of the described doubtful fire generation area that is used for judging that described variable field of view video camera obtains meets the judge module of pre-set dimension, with described variable field of view video camera with specifically be used for when described target object does not meet described pre-set dimension, the control module of adjusting described variable field of view focus of camera enlargement factor connects.
Described monitor module, described pretreatment module, described control module, described fire judge module and described first alarm module are arranged in the regionally detecting subsystem, and described regionally detecting subsystem is arranged in described default zone of protection.
Described regionally detecting subsystem also comprises:
Supply module, described supply module is combined mutually fully by device of solar generating, fuel cell power supply two-way, is perhaps combined fully mutually by active and standby Switching power device and accumulator two-way.
Described fire detecting system also comprises:
The CSRC ADMINISTRATION SUBSYSTEM is connected with described regionally detecting subsystem;
Described regionally detecting subsystem also comprises:
Be used for when the described first alarm module output alarm information, the judged result of the close shot image of described fire monitor message, described doubtful fire occurrence positions and described fire judge module is sent to the first communication module of described CSRC ADMINISTRATION SUBSYSTEM, be connected with described first alarm module, described monitor module and described fire judge module;
Described CSRC ADMINISTRATION SUBSYSTEM comprises:
Be used to receive the second communication module of the judged result of the close shot image of the described fire monitor message that described area monitoring subsystem sends, described doubtful fire occurrence positions and described fire judge module, be connected with described first communication module;
Be used for the close shot image of described fire monitor message, described doubtful fire occurrence positions is analyzed, and compare with the history image of described default zone of protection, and in conjunction with the judged result of described fire judge module, secondary is judged the whether secondary judge module of breaking out of fire of described default zone of protection, is connected with described second communication module;
Be used for when described secondary judge module is judged described default zone of protection breaking out of fire, second alarm module of output alarm information is connected with described secondary judge module.
Described CSRC ADMINISTRATION SUBSYSTEM also comprises:
Be used to store the database of the history image of described default zone of protection, be connected with described secondary judge module.
Embodiment of the present utility model has following beneficial effect:
When default zone of protection doubtful fire occurs and takes place, by adjusting the variable field of view video camera, obtain the close shot image of default zone of protection, increased the detection range of default zone of protection;
Adopt the fixedly surveillance style of visual field video camera (or other fire detectors) of variable field of view video camera combination, can significantly reduce the response time of system, realize early stage and high-sensitive detection;
Carrying out fire when identification, considering the influence of environmental parameter, improving anti-mistaking greatly and reported to the police and fail to report alert ability, making system more reliable the image that gets access to.
Description of drawings
Fig. 1 is the structural representation of the fire detecting system of the utility model embodiment;
Fig. 2 is another structural representation of the fire detecting system of the utility model embodiment;
Fig. 3 is the variable field of view video camera of the utility model embodiment and the fixing schematic layout pattern of visual field video camera;
Fig. 4 is the another structural representation of the fire detecting system of the utility model embodiment;
Fig. 5 is a structural representation again of the fire detecting system of the utility model embodiment;
Fig. 6 is the schematic flow sheet of the fire detecting method of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.
Be illustrated in figure 1 as the structural representation of the fire detecting system of the utility model embodiment, described fire detecting system comprises:
So-called variable field of view video camera can be adjusted the video camera of shooting angle and shooting focal length exactly, and with fixedly the visual field video camera is corresponding, fixedly the visual field video camera can only adopt fixed angle and fixed focal length to obtain image;
Described variable field of view video camera 1011 is ball-shaped camera or the rifle formula video camera of wearing The Cloud Terrace, described variable field of view video camera 1011 can adopt CCD or CMOS (the Complementary Metal Oxide Semiconductor of spectral response scope at 400-1200nm (nanometer), complementary metal oxide semiconductor (CMOS)) imageing sensor, and can mate corresponding optical filter and obtain coloured image or near-infrared image, described variable field of view video camera 1011 can be chosen different optical filters according to different environment, for example, choose colored filter by day and obtain coloured image, choose near infrared filter at night and obtain near-infrared image; Preferably, described variable field of view video camera 1011 can be the two variable video camera of the optical filter that can automatically switch, automatic characteristics according to current actual environment, definite needs obtain the type of image, for example when the rainy day, mainly to obtain near-infrared image, because near-infrared image is subjected to the influence of rainy day less.In addition, in order to obtain default zone of protection image at any angle, described variable field of view video camera 1011 can rotate arbitrarily in 360 degree scopes.
When the close shot image of 104 pairs of described doubtful fire generation area of above-mentioned fire judge module is analyzed, can be according to flame or the smoke characteristics in the described close shot image, for example brightness changes delta B, flicker frequency Freq, motion feature Move, blurred background feature Δ G, flame area variation characteristic Δ A, related coefficient Δ I, saturation degree changes delta S etc., calculate fire probability of happening PF=F (the Δ B of default zone of protection, Δ G, Δ V, Δ A, Freq, Move...), and judge whether described fire probability of happening meets or exceeds predetermined threshold value ThAlarm, judge the whether breaking out of fire of described default zone of protection with this.
Above-mentioned first alarm module 105 can pass through output alarm information, reports to the police in modes such as enabling signal lamp or startup sirens.
System by the foregoing description provides can adjust the variable field of view video camera, obtains the close shot image of doubtful fire generation area, thereby realizes remote detection.
In the said system, described monitor module 101 can only comprise variable field of view video camera 1011, in the initial supervision stage, obtain the initial monitoring picture of default zone of protection by described variable field of view video camera 1011, when in the initial monitoring picture that gets access to, finding doubtful fire, control the close shot image that described variable field of view video camera 1011 obtains doubtful fire generation area, thereby judge whether breaking out of fire.
In the said system, can select to be provided with the image that one or more variable field of view video camera 1011 obtains default zone of protection, protect within the monitoring range that the zone is positioned at described monitor module 101 to guarantee described setting up defences according to the size of default zone of protection.When the angle of coverage of default zone of protection hour, said system can only adopt a variable field of view video camera 1011, realizes the detection of default zone of protection, its implementation can be following two kinds:
First kind of implementation is: in the initial supervision stage, the focal length of described variable field of view video camera 1011 is adjusted into first focal length, described first focal length is less numerical value, has bigger visual field angle of coverage to guarantee described variable field of view video camera 1011, covers described default zone of protection; Described variable field of view video camera 1011 obtains the initial monitoring picture of default zone of protection, and described pretreatment module 102 analyzes when existing doubtful fire to take place according to described initial monitoring picture, determines doubtful fire generation area; 103 of described control modules are according to described doubtful fire generation area, control the visual field that described variable field of view video camera 1011 turns to the fire generation area, and focal length adjusted to second focal length, to obtain the close shot image of described doubtful fire generation area, described second focal length is greater than described first focal length; The close shot image of the doubtful fire generation area that described fire judge module 104 gets access to according to described variable field of view video camera 1011 judges whether breaking out of fire; Described first alarm module 105 when described default zone of protection breaking out of fire, output alarm information.
Second kind of implementation is: in the initial supervision stage, distance according to default zone of protection detection range, the focal length of described variable field of view video camera 1011 is set to first focal length, described first focal length need guarantee can identify fire visible features information in the initial monitoring picture that described variable field of view video camera 1011 gets access to; And the velocity of rotation of described change visual field video camera 1011 is set, make described variable field of view video camera 1011 under default velocity of rotation, rotate, to obtain the initial monitoring picture of default zone of protection all angles position according to predeterminated frequency periodic rotary or aperiodicity; Described pretreatment module 102 analyzes when existing doubtful fire to take place according to described initial monitoring picture, determines doubtful fire generation area; 103 of described control modules are according to described doubtful fire generation area, control the visual field that described variable field of view video camera 1011 turns to the fire generation area, and focal length adjusted to second focal length, to obtain the close shot image of described doubtful fire generation area, described second focal length is greater than described first focal length; The close shot image of the doubtful fire generation area that described fire judge module 104 gets access to according to described variable field of view video camera 1011 judges whether breaking out of fire; Described first alarm module 105 when described default zone of protection breaking out of fire, output alarm information.
Generally, a variable field of view video camera 1011 can't satisfy the detection of large space, when carrying out the detection of large space, said system can adopt many variable field of view video cameras 1011, so that default zone of protection is within the monitoring range of described variable field of view video camera 1011, yet, the cost of variable field of view video camera 1011 is higher, when system adopts many variable field of view video cameras 1011, the cost of the great increase of meeting system, therefore, can adopt other fire surveillance equipments in conjunction with described variable field of view video camera 1011, obtain the fire monitor message of default zone of protection, when getting access to doubtful fire generation area, re-use the close shot image that variable field of view video camera 1011 obtains described doubtful fire generation area.
Be illustrated in figure 2 as another structural representation of the fire detecting system of the utility model embodiment, on the basis of the foregoing description, described monitor module 1011 also comprises:
At least one is visual field video camera 1012 fixedly, is used to obtain the initial monitoring picture of described default zone of protection;
Described default zone of protection is within the field coverage of described fixedly visual field video camera 1012, and described fire monitor message is the initial monitoring picture of the described default zone of protection that gets access to of described fixedly visual field video camera.
Described fixedly visual field video camera 1012 also can adopt CCD or the cmos image sensor of spectral response scope at 400-1200nm, and can mate corresponding optical filter to obtain colour or near-infrared image.
The image of the default zone of protection that above-mentioned pretreatment module 102 can get access to described fixedly visual field video camera 1012 carries out analyzing and processing, concrete, can analyze the slight change of flames such as brightness Δ B, gradient delta G in the image, texture Δ V, flicker frequency Freq or smoke characteristics, at this moment, do not need absolute reliability, focus in time finding apace doubtful fire generation area.
The close shot image of the doubtful fire generation area that 104 pairs of described variable field of view video cameras 1011 of above-mentioned fire judge module obtain is analyzed identification, judges whether breaking out of fire.
In addition, in order to reduce the cost of system, described variable field of view video camera 1011 can be set an initial angle of coverage and initial focal length, substitute one or more fixedly visual fields video camera 1012 and cover a certain fixing visual field of presetting in the zone of protection, thereby reduce the fixedly use amount of visual field video camera 1012, at this moment, described default zone of protection is within the field coverage of described fixedly visual field video camera 1012 and described variable field of view video camera 1011, and described fire monitor message is the initial monitoring picture of the described default zone of protection that gets access to of described fixedly visual field video camera 1012 and described variable field of view video camera 1011.
In order to judge whether breaking out of fire more accurately, described fire judge module 104 is except the close shot image of doubtful fire generation area that described variable field of view video camera 1011 is obtained is analyzed, can also analyze the initial monitoring picture that described fixedly visual field video camera 1012 obtains, judge whether breaking out of fire.
At this moment, described fire judge module also is connected with described fixedly visual field video camera, described fire judge module is further used for the initial monitoring picture of the described default zone of protection that obtains according to described fixedly visual field video camera and described variable field of view video camera and the close shot image of described doubtful fire generation area, judge the whether breaking out of fire of described default zone of protection, and obtain a judged result.
When in said system, comprising a plurality of fixedly visual fields video camera 1012, the layout of described a plurality of fixedly visual fields video camera 1012 and described variable field of view video camera 1011, detection range and angle of coverage to described default zone of protection have very big influence, generally, described fixedly visual field video camera 1012 layouts become covering of the fan, hemisphere face or sphere, are illustrated in figure 3 as the variable field of view video camera of the utility model embodiment and the fixing schematic layout pattern of visual field video camera.
To how fixedly visual field video camera 1012 and the variable field of view video camera 1011 in the selecting system is elaborated below.
Suppose one fixedly the vertical field of view angle of visual field video camera 1012 be φ
k, the horizontal field of view angle is ψ
j, then the individual fixedly vertical angle of coverage of visual field video camera 1012 of n is:
θ
V＝f(φ
1，φ
2，...φ
n)
Horizontal angle of coverage is:
θ
H＝f(ψ
1，ψ
2，...ψ
n)
Suppose D
mBe the ultimate range that the individual fixedly visual field video camera 1012 of m needs detection, V
mBe the minimum constructive height of the target object that on described detection range, will survey, S
mFor surveying the minimum imaging size of the target object that needs, fixedly the lens focus of visual field video camera 1012 is so:
F
m＝S
m/V
m□D
m
Suppose D
MaxBe the ultimate range that variable field of view video camera 1011 need be surveyed, V
MinBe the minimum constructive height of the target object that on maximum detectable range, will survey, S
mFor surveying the minimum imaging size of the target object that needs, the lens focus of the maximum amplification of described variable field of view video camera 1011 is:
F
max＝S
min/V
min□D
max
Below with reference to the fixedly visual field video camera 1012 among above-mentioned Fig. 3 and the layout of variable field of view video camera 1011, the fixedly visual field video camera 1012 that needs in the system and the number and the focal length of variable field of view video camera 1011 are calculated.
The maximum detectable range of supposing default zone of protection is 200m, the horizontal field of view angle of coverage is 360 degree, the vertical field of view angle of coverage is 70 degree, and the expectation fixedly vertical height of the target object of the doubtful fire generation area that gets access to of visual field video camera 1012 is 1.8m, the imaging ratio of described fixedly visual field video camera 1012 is 1.5%, CCD at described fixedly visual field video camera 1012 is 1/3 " time, the focal length of described fixedly visual field video camera 1012 is:
F
m＝S
m/V
m□D
m
＝(1.5％*4.8)/1.8*200＝8mm
Wherein, 4.8 for imaging size be 1/3 " the width of CCD, the product of the imaging ratio of described width and described fixedly visual field video camera 1012 equals to survey the minimum imaging size S that needs
m
And focal length be the field angle of the camera lens of 8mm is level 32 degree, vertical 23 degree, therefore then can calculate the number of the fixedly visual field video camera 1012 that needs in the system, promptly, the levels that realize 360 degree cover and need: 12 of 360/32 ≈ are visual field video camera 1012 fixedly, the vertical coverings that realize 70 degree need: 3 layers of 70/23 ≈ are visual field video camera 1012 fixedly, that is, need altogether in the system 12 * 3=36 platform fixedly visual field video camera 1012 could cover whole default zone of protection;
By foregoing description as can be known, variable field of view video camera 1011 can substitute one or more fixedly visual fields video camera 1012, obtain the fire monitor message of default zone of protection, therefore, the 3rd layer supervision visual field of vertical field of view can be realized covering by variable field of view video camera 1011, promptly only need in the system 24 fixedly visual field video camera 1012 get final product.Certainly, along with the angle of video camera deflects down, detection range is actual can be shortened, if the ground floor video camera of vertical field of view can be realized the 200m detection range, the second layer video camera of vertical field of view then may only can be surveyed the distance of 100m so, the second layer focus of camera of vertical field of view then can be 4mm like this, because reducing of focal length of camera, its angle of coverage then can increase, be that horizontal angle of coverage becomes 63 degree, vertical angle of coverage then becomes 42 degree, therefore, at this moment, only to need 6 lens focus be that the fixedly visual field video camera 1012 of 4mm gets final product to the second layer of vertical field of view.
In sum, by the layout of rational video camera, can when guaranteeing to monitor that the visual field covers default protection place, reduce the cost of system.
In addition, for variable field of view video camera 1011, if the imaging ratio of expectation is 10%, the focal length of then described variable field of view video camera 1011 is:
F
Max=S
Min/ V
MinMouth D
Max
＝(10％*4.8)/1.8*200＝54mm
Therefore, can to select zooming range be the variable field of view video camera 1011 of 4mm～55mm in system.
Above-mentioned control module 103 is according to the information of described doubtful fire generation area, control the supervision visual field that described variable field of view video camera 1011 turns to the fixedly visual field video camera 1012 of finding doubtful fire image, and then control described variable field of view video camera 1011 and adjust focal length, obtain the close shot image of described doubtful fire generation area, before carrying out aforesaid operations, rotational angle when also needing to know described variable field of view video camera 1011 fixedly visual field video camera 1012 field coverages or local field of view coverage coupling are consistent with each, and the initial focal length enlargement factor of described variable field of view video camera, as shown in Figure 2, described system also comprises:
First memory module 106, be connected with described control module 103, rotational angle when being used to store described variable field of view video camera 1011 fixedly visual field video camera 1012 field coverages or local field of view coverage coupling are consistent with each, and the initial focal length enlargement factor of described variable field of view video camera 1011;
Described control module 103 is further used for controlling the close shot image that described variable field of view video camera 1011 obtains described doubtful fire generation area according to the rotational angle of described variable field of view video camera 1011 and initial focal length enlargement factor.
In addition, in rotational angle and the initial focal length enlargement factor of described control module 103 according to described variable field of view video camera 1011, after controlling described variable field of view video camera 1011 and getting the close shot image of described doubtful fire generation area, target object in the close shot image of the described doubtful fire generation area that described variable field of view video camera 1011 gets access to may and not meet the requirement of pre-set dimension, be difficult to fire characteristic is discerned, therefore, at this moment, described fire detecting system also comprises:
Judge module 107 is connected with described control module 103 with described variable field of view video camera 1011, and whether the target object of the close shot image of the described doubtful fire generation area that is used for judging that described variable field of view video camera 1011 obtains meets pre-set dimension;
Described control module 103 is further used for when described target object does not meet described pre-set dimension, adjust the focal length enlargement factor of described variable field of view video camera 1011, till the target object in the close shot image of described doubtful fire generation area meets pre-set dimension.
Fixedly visual field video camera 1012 field coverages or local field of view coverage are mated rotational angle when consistent with each at the described variable field of view video camera 1011 of storage, and before the initial focal length enlargement factor of described variable field of view video camera 1011, also need the variable field of view video camera 1011 and the fixing supervision visual field of visual field video camera 1012 are mated, can mate the variable field of view video camera 1011 and the fixing supervision visual field of visual field video camera 1012 according to following steps:
The first step:, make the visual field basically identical of its image visual field and a certain fixedly visual field video camera 1012 by regulating the rotational angle (luffing angle, level angle) and the focal length of variable field of view video camera 1011;
Second step: at variable field of view video camera 1011 with fixedly generate a series of points of adjustment one to one automatically in the view field image of visual field video camera 1012, when there is deviation in adjustment point position, carry out the visual field and revise, up to the position basically identical of all corresponding adjustment o'clock in two view field image;
The 3rd step: in the view field image of fixing visual field video camera 1012, choose the certain characteristics point, at this moment, on the view field image of variable field of view video camera 1011, generate the characteristic of correspondence point automatically, if characteristic point position is inaccurate, then with the position correction of unique point to position accurately;
The 4th step: adjust variable field of view video camera 1011, the center of its image is adjusted on some unique points of the fixing view field image of visual field video camera 1012, on the view field image of variable field of view video camera 1011, point out the point of this unique point correspondence afterwards, and then finish the sweep limit adjustment;
The 5th step: checking matching result, according to the size of default zone of protection and the size of the close shot image of expecting to obtain, select the enlargement factor of the focal length of variable field of view video camera 1011, can click the arbitrary characteristics point in the view field image of fixing visual field video camera 1012 afterwards, check whether variable field of view video camera 1011 can correctly turn to corresponding angle, and the acquisition character pair is put close shot image clearly;
The 6th step:, then carry out the next fixedly coupling of visual field video camera 1012 if the visual field matches; Otherwise repeat above step, carry out the secondary coupling.
In addition, the method that the variable field of view video camera 1011 and the fixing image visual field of visual field video camera 1012 are mated also can for:
At first, the fixing view field image of visual field video camera 1012 is divided into the little subregion of protection of n five equilibrium, and be numbered, for example j the little subregion of protection of the individual fixedly visual field video camera 1012 of K is KJ, adjust variable field of view video camera 1011 and rotate and adjust focal length, make that the close shot image of the amplification that described variable field of view video camera 1011 gets access to is corresponding one by one with KJ the little subregion of protection, to protect little subregion corresponding and the rotational angle of this moment of variable field of view video camera 1011 and focal length enlargement factor are just with described KJ, protect the setting parameter that little subregion all has one group of variable field of view video camera 1011 at each, during actual motion, system promptly can quick control realize obtaining of close shot image.And for the doubtful fire that occurs on the little partition boundaries of protection, control system can be by simple difference algorithm, the rotational angle and the focal length enlargement factor of the definite described variable field of view video camera that should select.
In addition, because described variable field of view video camera 1011 when obtaining the image of doubtful fire generation area, may be subjected to the influence of environment, thereby influence the judgement of fire, therefore, described fire judge module 104 comprises:
Meteorology/environmental parameter sensor 108 is used to obtain the meteorology or the environmental parameter information of described default zone of protection; Described meteorology or environmental parameter information spinner will comprise: wind speed, temperature, humidity etc.;
Described fire judge module 104 comprises:
Image pretreatment unit 1041, be connected with described variable field of view video camera with described meteorology/environmental parameter sensor, described fixedly visual field video camera, be used for meteorology or environmental parameter information according to described default zone of protection, the initial monitoring picture of the described default zone of protection that described fixedly visual field video camera and described variable field of view video camera are obtained and the close shot image of described doubtful fire generation area compensate and revise, the image after obtaining handling;
Fire judging unit 1042 is used for according to the image after the described processing, judges the whether breaking out of fire of described default zone of protection, and obtains a judged result.
Because the close shot image of the doubtful fire generation area after handling is considered the influence of environmental parameter, therefore, can improve the anti-mistaking warning greatly and fail to report alert ability, make system more reliable.
The system that provides by the foregoing description, can adopt the variable field of view video camera and the fixing mode of visual field video camera combination, fire to default zone of protection is monitored and is surveyed, and on the basis of the covering visual field that guarantees default zone of protection, has reduced the cost of system again.
In addition, also can adopt other fire detectors to substitute described fixedly visual field video camera 1012 in the above-mentioned monitor module 101, combine the detection of carrying out fire with described variable field of view video camera 1011, be illustrated in figure 4 as the another structural representation of the fire detecting system of the utility model embodiment, on the basis of above-mentioned embodiment shown in Figure 1, described monitor module 1011 also comprises:
At least one fire detector 1013, be used to survey the doubtful fire characteristic information of described default zone of protection, described default zone of protection is within the investigative range of described fire detector 1013, and described fire monitor message is the doubtful fire characteristic information of the described default zone of protection that detects of described fire detector 1013.
Described fire detector 1013 can be higher than 100 ℃ infrared sensor for the response heat source temperature, also can be sensor or the wireless sensor network based on detection principles such as temperature, radiation, light, perhaps the detector on the satellite etc.The doubtful fire characteristic information that described fire detector 1013 gets access to, the variable field of view video camera 1011 that is used to link rotates and adjusts focal length, and then obtains the close shot image of doubtful clearly fire generation area.
Certainly, in order to save the number of described fire detector 1013, described variable field of view video camera can substitute one or more fire detectors 1013, survey the fire information of default zone of protection, at this moment, described default zone of protection is within the investigative range of described fire detector 1013 and described variable field of view video camera 1011, and described fire monitor message is the doubtful fire characteristic information of the described default zone of protection that detects of described fire detector 1013 and the initial monitoring picture of the described default zone of protection that described variable field of view video camera 1011 gets access to.
For can so that described variable field of view video camera 1011 quick rotation to the investigative range of the fire detector of finding doubtful fire, described system also comprises:
Second memory module 109 is used to store the investigative range of described variable field of view video camera 1011 and each fire detector 1013 rotational angle when consistent, and the initial focal length enlargement factor of described variable field of view video camera 1011;
Described control module 103 is further used for controlling the close shot image that described variable field of view video camera 1011 obtains described doubtful fire generation area according to the rotational angle of described variable field of view video camera 1011 and initial focal length enlargement factor.
With the embodiment among Fig. 2, described fire detecting system also comprises:
Judge module 107 is connected with described control module 103 with described variable field of view video camera 1011, and whether the target object of the close shot image of the described doubtful fire generation area that is used for judging that described variable field of view video camera 1011 obtains meets pre-set dimension;
Described control module 103 is further used for when described target object does not meet described pre-set dimension, adjust the focal length enlargement factor of described variable field of view video camera 1011, till the target object in the close shot image of described doubtful fire generation area meets pre-set dimension.
The system that provides by the foregoing description, can adopt the mode of variable field of view video camera and other fire detector combinations, fire to default zone of protection is monitored and is surveyed, and on the basis of the covering visual field that guarantees default zone of protection, has reduced the cost of system again.
In the system of above-mentioned embodiment shown in Figure 1, described monitor module 101 can be arranged at the fire hazard monitoring scene of default zone of protection, described pretreatment module 12, described control module 103, described fire judge module 104 and described first alarm module 105 are arranged at long-range, at this moment, described system also needs to have a communication module, be arranged at the fire hazard monitoring scene, by wired or wireless network, fire monitor message of the default zone of protection that described monitor module 101 is got access to etc., send to other long-range modules, perhaps send long-range control information to described monitor module 101; At this moment, owing to need the data quantity transmitted may be bigger, therefore higher to the bandwidth requirement of network, in addition, the real-time of system also be difficult to guarantee.
Consideration based on real-time, described monitor module 101, described pretreatment module 12, described control module 103, described fire judge module 104 and described first alarm module 105 all can be arranged in the regionally detecting subsystem 100, described regionally detecting subsystem 100 is positioned at the fire hazard monitoring scene of described default zone of protection.
When the detection of large space, the large space that needs are surveyed can be divided into several default zone of protections, the corresponding regionally detecting subsystem 100 of each default zone of protection.In addition, in order can managing, can a CSRC ADMINISTRATION SUBSYSTEM to be set, a plurality of regionally detecting subsystems 100 to be carried out unified management long-range to a plurality of regionally detecting subsystems 100.
Be illustrated in figure 5 as a structural representation again of the fire detecting system of the utility model embodiment, on the basis of above-mentioned embodiment shown in Figure 1, described system can also comprise:
Described regionally detecting subsystem 100 also comprises:
Described CSRC ADMINISTRATION SUBSYSTEM 200 comprises:
Be understandable that the functional module in the above-mentioned zone detection subsystem 100 all needs to power when work, therefore, described regionally detecting subsystem 100 also comprises:
By the system that the foregoing description provides, the CSRC ADMINISTRATION SUBSYSTEM starts secondary image identification and fire arbitration functions, has improved the reliability of system.
Can adopt (Code Division Multiple Access between described second communication module 201 and the described first communication module 110 based on CDMA, CDMA mobile telecommunication) point to point wireless communication system, the perhaps wireless communication system of alternate manner, for place with good conditionsi, also can adopt wired communication system, for example local or wide area network etc.
Described CSRC ADMINISTRATION SUBSYSTEM 200 also comprises:
Long-range management for convenience, described regionally detecting subsystem 100 is after getting access to doubtful fire information, can with all fixedly the image that gets access to of visual field video camera 1012 reduce and splice, obtain the panoramic picture of default zone of protection, and send to CSRC ADMINISTRATION SUBSYSTEM 200.
Described CSRC ADMINISTRATION SUBSYSTEM 200 can be put in order, store the warning message that regionally detecting subsystem 100 sends, start the GIS map display, show the panoramic picture at fire hazard monitoring scene and the close shot image of fire generation area, can also start the digital picture Writing device fire image carried out imprinting preservation etc., in addition, can also send warning message and fire image etc. to other monitoring and alarming system.
System by the foregoing description provides can carry out unified management to the regionally detecting subsystem of a plurality of default zone of protections, has realized the distributed intelligence detection.
Be illustrated in figure 6 as the schematic flow sheet of the fire detecting method of the utility model embodiment, described fire detecting method may further comprise the steps:
Described fire monitor message is the initial monitoring picture of the described default zone of protection that obtains of described variable field of view video camera.
Described fire monitor message is at least one fixing initial monitoring picture of the described default zone of protection that obtains of visual field video camera and described variable field of view video camera.
Also comprise before the above-mentioned steps 63:
Character pair point or feature target in the view field image that described variable field of view video camera and described fixedly visual field video camera are got access to are mated one by one, obtain the field coverage of described variable field of view video camera and described fixedly visual field video camera or the local field of view coverage coupling rotational angle when consistent, and the initial focal length enlargement factor of described variable field of view video camera;
At this moment, above-mentioned steps 63 is specially:
According to the rotational angle and the initial focal length enlargement factor of described variable field of view video camera, control the close shot image that described variable field of view video camera obtains described doubtful fire generation area.
The doubtful fire characteristic information of the described default zone of protection that described fire monitor message detects at least one fire detector and the initial monitoring picture of the described default zone of protection that described variable field of view video camera obtains.
By the method that the foregoing description provides, can adjust the variable field of view video camera, obtain the close shot image of doubtful fire generation area, thereby realize remote detection.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. a fire detecting system is characterized in that, comprising:
Be used to obtain the monitor module of the fire monitor message of presetting zone of protection, described monitor module comprises the variable field of view video camera;
Be used for described fire monitor message is carried out analyzing and processing, obtain the pretreatment module of the doubtful fire generation area in the described default zone of protection, be connected with described monitor module;
Be used to control the control module that described variable field of view video camera obtains the close shot image of described doubtful fire generation area, be connected with described variable field of view video camera with described pretreatment module;
Be used for close shot image, judge the whether breaking out of fire of described default zone of protection, and obtain the fire judge module of a judged result, be connected with described variable field of view video camera according to described doubtful fire generation area;
Be used for when described judged result is indicated described default zone of protection breaking out of fire, first alarm module of output alarm information is connected with described fire judge module.
2. fire detecting system according to claim 1 is characterized in that, described monitor module only comprises described variable field of view video camera.
3. fire detecting system according to claim 1 is characterized in that, described monitor module also comprises:
At least one is used to obtain the fixedly visual field video camera of the initial monitoring picture of described default zone of protection.
4. fire detecting system according to claim 3 is characterized in that, also comprises:
Be used to store the field coverage of described variable field of view video camera and described fixedly visual field video camera or the local field of view coverage coupling rotational angle when consistent, and first memory module of the initial focal length enlargement factor of described variable field of view video camera, with the rotational angle and the initial focal length enlargement factor that specifically are used for according to described variable field of view video camera, control the control module connection that described variable field of view video camera obtains the close shot image of described doubtful fire generation area.
5. fire detecting system according to claim 1 is characterized in that, described monitor module also comprises:
At least one is used to survey the fire detector of the doubtful fire characteristic information of described default zone of protection.
6. fire detecting system according to claim 5 is characterized in that, also comprises:
Be used to store the investigative range of described variable field of view video camera and the described fire detector rotational angle when consistent, and second memory module of the initial focal length enlargement factor of described variable field of view video camera, with the rotational angle and the initial focal length enlargement factor that specifically are used for according to described variable field of view video camera, control the control module connection that described variable field of view video camera obtains the close shot image of described doubtful fire generation area.
7. fire detecting system according to claim 1, it is characterized in that, described monitor module, described pretreatment module, described control module, described fire judge module and described first alarm module are arranged in the regionally detecting subsystem, and described regionally detecting subsystem is arranged in described default zone of protection.
8. fire detecting system according to claim 7 is characterized in that, described regionally detecting subsystem also comprises:
Supply module, described supply module is combined mutually fully by device of solar generating, fuel cell power supply two-way, is perhaps combined fully mutually by active and standby Switching power device and accumulator two-way.
9. fire detecting system according to claim 7 is characterized in that, also comprises:
The CSRC ADMINISTRATION SUBSYSTEM is connected with described regionally detecting subsystem;
Described regionally detecting subsystem also comprises:
Be used for when the described first alarm module output alarm information, the judged result of the close shot image of described fire monitor message, described doubtful fire occurrence positions and described fire judge module is sent to the first communication module of described CSRC ADMINISTRATION SUBSYSTEM, be connected with described first alarm module, described monitor module and described fire judge module;
Described CSRC ADMINISTRATION SUBSYSTEM comprises:
Be used to receive the second communication module of the judged result of the close shot image of the described fire monitor message that described area monitoring subsystem sends, described doubtful fire occurrence positions and described fire judge module, be connected with described first communication module;
Be used for the close shot image of described fire monitor message, described doubtful fire occurrence positions is analyzed, and compare with the history image of described default zone of protection, and in conjunction with the judged result of described fire judge module, secondary is judged the whether secondary judge module of breaking out of fire of described default zone of protection, is connected with described second communication module;
Be used for when described secondary judge module is judged described default zone of protection breaking out of fire, second alarm module of output alarm information is connected with described secondary judge module.
10. fire detecting system according to claim 9 is characterized in that, described CSRC ADMINISTRATION SUBSYSTEM also comprises:
Be used to store the database of the history image of described default zone of protection, be connected with described secondary judge module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201055097U CN201435130Y (en) | 2009-02-17 | 2009-02-17 | Fire detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201055097U CN201435130Y (en) | 2009-02-17 | 2009-02-17 | Fire detection system |
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| CN201435130Y true CN201435130Y (en) | 2010-03-31 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070015A (en) * | 2015-08-10 | 2015-11-18 | 中国矿业大学 | Wireless sensor device and method used for coal field fire zone parameter dynamic monitoring |
| CN110491066A (en) * | 2019-08-21 | 2019-11-22 | 深圳云感物联网科技有限公司 | Forest fire protection monitoring and warning system based on infrared thermal imaging |
| CN113066251A (en) * | 2021-03-17 | 2021-07-02 | 国核电力规划设计研究院有限公司 | Fire detection and video monitoring linkage system and method |
| CN115240359A (en) * | 2022-07-15 | 2022-10-25 | 南京信息工程大学 | Monitoring devices based on remote sensing technique prevention forest fire |
-
2009
- 2009-02-17 CN CN2009201055097U patent/CN201435130Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070015A (en) * | 2015-08-10 | 2015-11-18 | 中国矿业大学 | Wireless sensor device and method used for coal field fire zone parameter dynamic monitoring |
| CN110491066A (en) * | 2019-08-21 | 2019-11-22 | 深圳云感物联网科技有限公司 | Forest fire protection monitoring and warning system based on infrared thermal imaging |
| CN113066251A (en) * | 2021-03-17 | 2021-07-02 | 国核电力规划设计研究院有限公司 | Fire detection and video monitoring linkage system and method |
| CN115240359A (en) * | 2022-07-15 | 2022-10-25 | 南京信息工程大学 | Monitoring devices based on remote sensing technique prevention forest fire |
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