CN102496235A - Image fire detector possessing optical integrity and method thereof - Google Patents
Image fire detector possessing optical integrity and method thereof Download PDFInfo
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- CN102496235A CN102496235A CN201110445827XA CN201110445827A CN102496235A CN 102496235 A CN102496235 A CN 102496235A CN 201110445827X A CN201110445827X A CN 201110445827XA CN 201110445827 A CN201110445827 A CN 201110445827A CN 102496235 A CN102496235 A CN 102496235A
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Abstract
An image fire detector possessing optical integrity and a method thereof belong to a fire detection technology field. The detector comprises: a shell, a detection light source I, a detection light source II, a light source driving circuit I, a light source driving circuit II, an infrared thermal image sensor, a CCD sensor, a protection lens I, a protection lens II, a temperature control circuit I, a temperature control circuit II, a image acquisition and signal processing circuit, a power conversion circuit and a signal output circuit. The infrared thermal image sensor is used to monitor a temperature abnormity signal before a fire hazard is generated. The temperature abnormity can be timely discovered. Combining an infrared thermal image, acquisition and analysis of a visible image, far-infrared light, near infrared light and the visible optical signal are detected so as to realize the optical integrity. Visible image data during the fire hazard is combined with the image data and temperature data in the fire infrared thermal image so as to process and determine the data. Fire alarm can be timely and accurately determined and an alarm signal can be given. A rate of false alarm can be substantially reduced and anti-interference performance of the detector can be increased.
Description
Technical field
The invention belongs to the fire detection technology field, particularly a kind of image fire detection device and method with optical perfection.
Background technology
At present; Large space place, industrial site get more and more in the time of along with the economic construction fast development; The large scale electrical power unit that adopts also increases day by day; Image-type fire detector has the advantages that protection domain is big, response speed is fast, be applicable to that protection is surveyed in the fire-fighting of large space place and industrial site, so its quantity of installing and using is also more and more.Along with security against fire receives increasing attention, more higher requirements have been proposed also in security against fire.
In the prior art; Visible light or near-infrared image type fire detector mainly utilize the visible images characteristic of fire hazard aerosol fog and flame to carry out the fire judgement through algorithm; Through practical applications actual conditions feedback, the type detector is easy to generate wrong report under factors such as sunlight and artificial light source interference; The main safeguard procedures that rely on equipment self of fire-fighting protection of the large scale electrical power unit that in large space place, industrial site, comes into operation; External protection mode mainly is to adopt to be close to or wound form heat detection, flame detecting, detection of gas or smoke particle early detection etc.; But because large scale electrical power unit running environment more complicated, can't be close to the formula protection during the serious and equipment component operation of electromagnetic interference (EMI).To this present situation; Be badly in need of exploitation and carry out the technology of fire early detection to crucial power equipment; Do not carry out special detection owing to still there is the infrared matrix of employing in the prior art; Infrared image signal through to fire and typical case's interference carries out data acquisition, processing and characteristic rule analysis; Realization is the gordian technique that solves the infrared image fire detector product design that is applicable to industrial site based on the fire early detection algorithm and the burning things which may cause a fire disaster positioning function of infrared image temperature-sensitive and infrared image detection principle.
A large amount of at present visible light or near-infrared image type fire detectors that use, the advantage of these detectors is: naked light or dense smoke to the protection zone occurs can be made response fast, can find fire early; The shortcoming of its existence is: the wrong report phenomenon of detector happens occasionally; Protection zone circumstance complication, light interference, strong electromagnetic and many dirt, a lot of detectors failure phenomenon just occurs in very short time after putting into operation; Can't realize the reliable detection of protection zone, bring hidden danger to management of fire safety, this is because the visible near-infrared image type fire detector that reaches belongs to the passive-type detection principle; When fire takes place; Visible and the near-infrared image of fire is when detector window incides sensor, and detector could be realized surveying, and when the window of detector takes place to pollute or in the protection domain during the unusual shelter of appearance; Detection performance will seriously descend, even possibly lose protective capability.
Summary of the invention
To the deficiency that prior art exists, the present invention provides a kind of image fire detection device and method with optical perfection.
Utilize infrared radiation to have to comprise the strong characteristics of temperature profile, penetration capacity and the infrared image in the protection domain is carried out Treatment Analysis; The temperature anomaly signal that early stage, fire was taken place is surveyed; Real-time detection and early warning shift to an earlier date fire alarm response time point significantly.The present invention adopts the self check light source, test and the detection of sensor detection performance in conjunction with the light transmission of the optical window that detects light path design and target design realization image fire detection device, thereby the window pollution of realizing the infrared image detection device detects and judgement; To the situation that occurs unusual shelter in the protection domain; Combining image comparative analysis technology of the present invention; Rule according to image change; When finding to have unusual shelter image to occur, quote foreign matter according to the comparative analysis of image that unusual shelter is arranged and no abnormal shelter image and blocked fault-signal, realize reliable detection protection to protection domain.
Technical scheme of the present invention is achieved in that the image fire detection device with optical perfection, comprises shell, detection light source I, detection light source II, light source driving circuit I, light source driving circuit II, infrared chart image-position sensor, ccd sensor, protection eyeglass I, protection eyeglass II, temperature control circuit I, temperature control circuit II, IMAQ and signal processing module, power-switching circuit and signal output apparatus; Signal output apparatus comprises 485 interface output circuits, 4-20mA signal output apparatus and relay output circuit; 4-20mA signal output apparatus output 4-20mA signal; 485 communication interface circuit are exported 485 communication signals; Relay output circuit output passive switch signal, according to different voltage requirements, 485 interface output circuits, 4-20mA signal output apparatus and relay output circuit are connected respectively to the different voltage output pins of power-switching circuit.
Detection light source I and detection light source II are installed in parallel in shell one side; Protection eyeglass I is installed in and detection light source I and the corresponding outer casing inner wall of detection light source II with protection eyeglass II; The detection light source I is the detection light source of far red light; The detection light source II is the detection light source of near infrared light and visible light, and power-switching circuit provides corresponding power supply for each electric component;
Light source driving circuit I input end links to each other with the output pin of IMAQ and signal processing module; Light source driving circuit I output terminal links to each other with the detection light source I; The input end of infrared chart image-position sensor links to each other with temperature control circuit I output terminal; The output terminal of infrared chart image-position sensor connects the input pin of IMAQ and signal processing module; IMAQ and signal processing module output pin connect temperature control circuit I input end, and the input end of light source driving circuit II links to each other with IMAQ and signal processing module output pin; The output terminal of light source driving circuit II links to each other with the detection light source II; The output terminal of ccd sensor links to each other with IMAQ and signal processing module input pin; The output pin of IMAQ and signal processing module links to each other with the input end of temperature control circuit II, and the output terminal of temperature control circuit II links to each other with the input end of ccd sensor; Power-switching circuit links to each other with the input pin of IMAQ and signal processing module, and signal output apparatus links to each other with the output pin of IMAQ and signal processing module, and signal output apparatus is connected with the voltage output pin of power-switching circuit.
The method that image fire detection device with optical perfection of the present invention carries out detection, specifically carry out as follows:
Step 1: see through the light signal of protection eyeglass in the sensor in real time monitoring scope, when reaching the time of setting, the detection starting light source, the beginning image data comprises temperature data and view data;
Step 2: judge whether sensor temperature is normal, is then to continue step 3; Otherwise failure count adds 1; If failure count is greater than sensor window over limit pollution counter
; The newspaper sensor fault; At this moment; If sensor temperature is higher than the high-order limit value
of temperature, freeze; If sensor temperature is lower than temperature low level limit value
, heat;
Step 3: sensor reaches IMAQ and signal processing module with data; Make comparisons with the initial setting image; Judging in the monitoring range has or not foreign matter to block: have; Then foreign matter blocks to count and adds 1; If counting exists foreign matter to block counter
greater than image, then report to the police, otherwise continue step 4; Do not have foreign matter to block, then foreign matter blocks the counting zero clearing, continues step 4;
Step 4: the temperature value of temperature value and initial setting is done comparison; If greater than the initial setting temperature; Then temperature value early warning counting adds 1; Then report early warning, otherwise continue next step if count greater than temperature over-range number of times setting value
this moment;
If temperature value is less than the temperature value of initial setting; Then do comparison with initial setting temperature speed; Then carry out next step less than initial setting temperature speed; Add 1 greater than the counting of temperature speed early warning then; Judge that counting is whether greater than the temperature rate-of-rise number of times setting value
that transfinites: be then to report early warning, otherwise carry out next step;
Step 5: judge whether to exist fire alarm according to the image information that receives; If exist; Then the image alarm counting adds 1; If counting is then reported a fire, otherwise is carried out next step greater than image alarm number of times setting value
;
If there is not fire alarm; Then do comparison: if greater than initial setting speed with the image change speed of initial setting; Then image rate fire alarm counting adds 1, at this moment, if counting is as if the setting value
that transfinites greater than image change speed; Then report a fire, otherwise carry out next step; If less than initial setting speed, return.
Beneficial effect:
1. through utilizing the temperature anomaly signal before the thermal-induced imagery sensor tip takes place fire to monitor; Through temperature variation in the monitoring and protection zone; In time find temperature anomaly, can realize that the detection of fire sign realizes fire prevention, reduce the danger of fire greatly.
2. through detection light source is set, can be regularly or irregularly carry out the eyeglass pollution detection, when finding that eyeglass pollutes when reaching design load, provide fault-signal, this function has improved the validity of detector greatly, has guaranteed detection performance simultaneously.
3. through adopting the image analysis processing technology, carry out discriminatory analysis, when shelter exists and duration when reaching setting value to the unusual shelter that occurs in the protection environment; Quote fault; In time the clear on-the-spot shelter of prompting related personnel guarantees that detection viewing field does not have the dead angle, guarantees detection performance.
4. through combining the collection analysis of thermal-induced imagery and visual picture, far red light, near infrared light and visible light signal are surveyed, realized optical perfection; In time find fire; Visual picture data through with fire the time combine view data and the temperature data in the fire thermal-induced imagery, carry out data processing and judge, promptly and accurately reliably judge fire alarm and provide alerting signal; Reduce rate of false alarm greatly, promote the detector interference free performance.
Description of drawings
Fig. 1 has the image fire detection device one-piece construction block diagram of optical perfection for the embodiment of the invention, and wherein 1 is protection eyeglass I, and 2 is shell;
Fig. 2 is an embodiment of the invention light source driving circuit connection layout;
Fig. 3 is an embodiment of the invention power-switching circuit connection layout;
Fig. 4 is the embodiment of the invention 485 interface output circuit connection layout;
Fig. 5 is an embodiment of the invention 4-20mA signal output apparatus connection layout;
Fig. 6 is an embodiment of the invention relay output circuit connection layout;
Fig. 7 has the image fire detection device sensor window pollution detection process flow diagram of optical perfection for the embodiment of the invention;
Fig. 8 has optical perfection for the embodiment of the invention image fire detection device judges whether to occur the process flow diagram that foreign matter blocks based on Flame Image Process;
Fig. 9 detects the early warning process flow diagram for the image fire detection actuator temperature that the embodiment of the invention has optical perfection;
Figure 10 has the image fire detection device graphical analysis alarm flow figure of optical perfection for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Image fire detection device with optical perfection of the present invention comprises shell, detection light source I, detection light source II, light source driving circuit I, light source driving circuit II, infrared chart image-position sensor, ccd sensor, protection eyeglass I, protection eyeglass II, temperature control circuit I, temperature control circuit II, IMAQ and signal processing module, power-switching circuit and signal output apparatus.
The detection light source I is infrared light supply IR-DT015, and the detection light source II is visible light source IS-DT01T; Protection eyeglass I is infrared protection eyeglass, adopts the infra-red material that can see through the corresponding light spectral limit, is to adopt the infra-red material that can see through the far red light spectral limit in the present embodiment; Protection eyeglass II is common protection eyeglass, adopts fused silica glass.The infrared chart image-position sensor is selected GT320CM-A03 for use, and ccd sensor is selected common CCD camera for use, and the anxious signal processing circuit of IMAQ is selected the YXDSP-F2812 processor module for use, and temperature control circuit is selected the HWJZ-TC010 module for use.Signal output apparatus comprises 485 interface output circuits, 4-20mA signal output apparatus and relay output circuit.Signal output apparatus comprises 485 interface output circuits (as shown in Figure 4), 4-20mA signal output apparatus (as shown in Figure 5) and relay output circuit (as shown in Figure 6); 4-20mA signal output apparatus output 4-20mA signal; 485 communication interface circuit are exported 485 communication signals; Relay output circuit output passive switch signal; According to different voltage requirements, 485 interface output circuits, 4-20mA signal output apparatus and relay output circuit are connected to the different voltage output pins of power-switching circuit.
As shown in Figure 1; Detection light source I and detection light source II are installed in parallel in shell one side; Protection eyeglass I is installed in and detection light source I and the corresponding outer casing inner wall of detection light source II with protection eyeglass II; The detection light source I is the detection light source of far red light, and the detection light source II is the detection light source of near infrared light and visible light, and power-switching circuit provides corresponding power supply for each electric component; Light source driving circuit I (as shown in Figure 2) input end links to each other with the output pin of IMAQ and signal processing module; Light source driving circuit I output terminal links to each other with the detection light source I; The input end of infrared chart image-position sensor links to each other with temperature control circuit I output terminal; The output terminal of infrared chart image-position sensor connects the input pin of IMAQ and signal processing module; IMAQ and signal processing module output pin connect temperature control circuit I input end, and the input end of light source driving circuit II links to each other with IMAQ and signal processing module output pin; The output terminal of light source driving circuit II links to each other with the detection light source II; The output terminal of ccd sensor links to each other with IMAQ and signal processing module input pin; The output pin of IMAQ and signal processing module links to each other with the input end of temperature control circuit II, and the output terminal of temperature control circuit II links to each other with the input end of ccd sensor; Power-switching circuit (as shown in Figure 3) links to each other with the input pin of IMAQ and signal processing module, and signal output apparatus links to each other with the output pin of IMAQ and signal processing module, and signal output apparatus is connected with the voltage output pin of power-switching circuit.
The method that adopts the image fire detection device with optical perfection of the present invention to carry out detection, specifically carry out as follows:
Step 1: see through the light signal of protection eyeglass in the sensor in real time monitoring scope, when reaching the 200 seconds time of setting, the detection starting light source, the beginning image data comprises temperature data and view data;
The image information of visible light and near infrared light in the image and the temperature information of the far red light in the thermal-induced imagery sensor in real time acquisition monitoring scope, the real-time acquisition monitoring scope of ccd sensor.
Step 2: judge whether sensor temperature is normal, is then to continue step 3; Otherwise failure count adds 1; If failure count is greater than sensor window over limit pollution counter
;
=3; The newspaper sensor fault; At this moment; If sensor temperature is higher than
;
=80 ℃, freeze; If sensor temperature is lower than temperature low level limit value
;
=0 ℃, heat; Sensor window pollution detection flow process is as shown in Figure 7;
Step 3: sensor reaches IMAQ and signal processing module with data; Make comparisons with the initial setting image; Judging in the monitoring range has or not foreign matter to block: have; Then foreign matter blocks to count and adds 1; If counting is greater than
; Then reporting to the police in
=3, otherwise continues step 4; Do not have foreign matter to block, then foreign matter blocks the counting zero clearing, continues step 4, and is as shown in Figure 8;
Step 4: the temperature value of temperature value and initial setting is done comparison; If greater than the initial setting temperature; Then temperature value early warning counting adds 1; This moment is if count greater than
;
=3; Then report early warning, otherwise continue next step;
If temperature value is less than the temperature value of initial setting; Then do comparison with initial setting temperature speed; Then carry out next step less than initial setting temperature speed; Add 1 greater than the counting of temperature speed early warning then; Judge that counting is whether greater than the temperature rate-of-rise setting value
that transfinites;
=3: be then to report early warning, otherwise carry out next step; Idiographic flow is as shown in the figure;
Step 5: judge whether to exist fire alarm according to the image information that receives; If exist; Then the image alarm counting adds 1; If counting is greater than
;
=3; Then report a fire, otherwise carry out next step;
If there is not fire alarm; Then do comparison: if greater than initial setting speed with the image change speed of initial setting; Then image rate fire alarm counting adds 1; At this moment; If if counting is greater than
;
=3 are then reported early warning, otherwise are carried out next step; If less than initial setting speed, return, shown in figure 10.
Through the present invention, judge fire alarm accurately and reliably and provide alerting signal, reduce rate of false alarm, promote the detector interference free performance.
Claims (2)
1. image fire detection device with optical perfection; Comprise shell, it is characterized in that: also comprise detection light source I, detection light source II, light source driving circuit I, light source driving circuit II, infrared chart image-position sensor, ccd sensor, protection eyeglass I, protection eyeglass II, temperature control circuit I, temperature control circuit II, IMAQ and signal processing module, power-switching circuit and signal output apparatus;
Said signal output apparatus comprises 485 interface output circuits, 4-20mA signal output apparatus and relay output circuit; According to different voltage requirements, 485 interface output circuits, 4-20mA signal output apparatus and relay output circuit are connected respectively to the different voltage output pins of power-switching circuit;
Said detection light source I and detection light source II are installed in parallel in shell one side; Protection eyeglass I is installed in and detection light source I and the corresponding outer casing inner wall of detection light source II with protection eyeglass II; Light source driving circuit I input end links to each other with the output pin of IMAQ and signal processing module; Light source driving circuit I output terminal links to each other with the detection light source I; The input end of infrared chart image-position sensor links to each other with temperature control circuit I output terminal; The output terminal of infrared chart image-position sensor connects the input pin of IMAQ and signal processing module, and IMAQ and signal processing module output pin connect temperature control circuit I input end, and the input end of light source driving circuit II links to each other with IMAQ and signal processing module output pin; The output terminal of light source driving circuit II links to each other with the detection light source II; The output terminal of ccd sensor links to each other with IMAQ and signal processing module input pin; The output pin of IMAQ and signal processing module links to each other with the input end of temperature control circuit II, and the output terminal of temperature control circuit II links to each other with the input end of ccd sensor; Power-switching circuit links to each other with the input pin of IMAQ and signal processing module, and signal output apparatus links to each other with the output pin of IMAQ and signal processing module, and signal output apparatus is connected with the voltage output pin of power-switching circuit.
2. the method that the image fire detection device with optical perfection as claimed in claim 1 carries out detection is characterized in that: specifically carry out as follows:
Step 1: see through the light signal of protection eyeglass in the sensor in real time monitoring scope, when reaching the time of setting, the detection starting light source, the beginning image data comprises temperature data and view data;
Step 2: judge whether sensor temperature is normal, is then to continue step 3; Otherwise failure count adds 1; If failure count is greater than sensor window over limit pollution counter
; The newspaper sensor fault; At this moment; If sensor temperature is higher than the high-order limit value
of temperature, freeze; If sensor temperature is lower than temperature low level limit value
, heat;
Step 3: sensor reaches IMAQ and signal processing module with data; Make comparisons with the initial setting image; Judging in the monitoring range has or not foreign matter to block: have; Then foreign matter blocks to count and adds 1; If counting exists foreign matter to block counter
greater than image, then report to the police, otherwise continue step 4; Do not have foreign matter to block, then foreign matter blocks the counting zero clearing, continues step 4;
Step 4: the temperature value of temperature value and initial setting is done comparison; If greater than the initial setting temperature; Then temperature value early warning counting adds 1; Then report early warning, otherwise continue next step if count greater than temperature over-range number of times setting value
this moment;
If temperature value is less than the temperature value of initial setting; Then do comparison with initial setting temperature speed; Then carry out next step less than initial setting temperature speed; Add 1 greater than the counting of temperature speed early warning then; Judge that counting is whether greater than the temperature rate-of-rise number of times setting value
that transfinites: be then to report early warning, otherwise carry out next step;
Step 5: judge whether to exist fire alarm according to the image information that receives; If exist; Then the image alarm counting adds 1; If counting is then reported a fire, otherwise is carried out next step greater than image alarm number of times setting value
;
If there is not fire alarm; Then do comparison: if greater than initial setting speed with the image change speed of initial setting; Then image rate fire alarm counting adds 1; At this moment; If counting is then reported a fire, otherwise is carried out next step as if the setting value
that transfinites greater than image change speed; If less than initial setting speed, return.
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| CN102708647A (en) * | 2012-06-25 | 2012-10-03 | 北京中恩时代科技有限责任公司 | Image and multi-band infrared-ultraviolet compound fire disaster detection system and method |
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| US11183042B2 (en) | 2019-07-19 | 2021-11-23 | Honeywell International Inc. | Thermographic detector device for a fire alarm control system |
| US11727778B2 (en) | 2019-07-19 | 2023-08-15 | Honeywell International Inc. | Thermographic detector device for a fire alarm control system |
| US11145186B2 (en) | 2019-08-27 | 2021-10-12 | Honeywell International Inc. | Control panel for processing a fault associated with a thermographic detector device of a fire alarm control system |
| CN115035677A (en) * | 2022-06-17 | 2022-09-09 | 新创碳谷控股有限公司 | Detection system for fire flame in oxidation furnace and fire extinguishing security system |
| CN116471129A (en) * | 2023-06-20 | 2023-07-21 | 深圳市美力高集团有限公司 | Security monitoring data secure storage system and method based on big data analysis |
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Address after: 110034 No. 218-20, Wen Da Road, Huanggu District, Shenyang, Liaoning. Patentee after: Shenyang Institute of Fire Protection, Ministry of Emergency Management Address before: 110034 No. 218-20, Wen Da Road, Huanggu District, Shenyang, Liaoning. Patentee before: Shenyang Fire-Extiquishing Inst., Public Security Ministry |