CN202033865U - Ultraviolet and infrared composite flame detector - Google Patents
Ultraviolet and infrared composite flame detector Download PDFInfo
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- CN202033865U CN202033865U CN2011201229471U CN201120122947U CN202033865U CN 202033865 U CN202033865 U CN 202033865U CN 2011201229471 U CN2011201229471 U CN 2011201229471U CN 201120122947 U CN201120122947 U CN 201120122947U CN 202033865 U CN202033865 U CN 202033865U
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Abstract
The utility model discloses a novel ultraviolet and infrared composite flame detector, the internal circuit of the ultraviolet and infrared composite flame detector comprises a microprocessor, an infrared pipe, an ultraviolet pipe, an ultraviolet signals processing circuit, an infrared signal processing circuit, a pulse signal detection circuit and an output control circuit, wherein the ultraviolet pipe connected with the microprocessor through the pulse signal detection circuit. When the microprocessor receives ultraviolet and infrared radiation signals which are acquired from ambient environment and sent by an ultraviolet photoelectric tube and an infrared sensor, the microprocessor compares the two type of signals with fire disaster feature information stored by the microprocessor per se, if the signals conform to the features of a fire disaster, a fire alarm signal is output, or else, a next working cycle is entered for continuous monitoring. The fire disaster detection technology is rapid and reliable in response, has strong resistance to false alarms due to double-spectrum detection, and is easy to transplant and popularize.
Description
Technical field
The utility model adopts purplish red outer composite flame detecting technology, relates to the field that all needs fast, reliably carry out detection.
Background technology
Along with society and expanding economy, each occasion of people's production and life all is faced with various disaster hidden-troubles.Warehouse particularly, the oil station, inflammable and explosive places such as chemical industry and dangerous material production, storage, if the monitoring of fire by manual patrol, effect and inefficiency, with high costs; In case breaking out of fire even blast, the intensity of a fire with rapid spread, very are difficult to put out a fire to save life and property, and jeopardize personal security, bring the great riches loss for production division and society.Therefore, the early stage monitoring of fire has very significant meaning, along with development of electronic technology, adopt electronic device applications in fire hazard monitoring, detection of fires quickly and accurately, just rapid warning reminding staff takes measures in the incipient stage of fire, avoids fermenting into large-sized fire, reduces the loss of wealth and personal security.The continuous development of the electronic technology of high speed development and various senser elements, for the early stage monitoring of round-the-clock large-scale fire provides may, spectrum signature according to fire, how to detect and the decision making package analysis according to the radiation feature in the flame, and the selecting for use of detection mode, realization of Bao Jinging accurately and fast response, the structure that is easy to transplant and be applicable to the datonation-inhibition system of self-extinguishing are our urgent problems.
Signal characteristic when taking place according to fire, fire hazard monitoring technology thoughts cigarette in the past, feel infrared and purplish red outer two spectral detection modes, all there are various limitation in sense cigarette and the infrared detection mode of sense, a large amount of smog sensitivities that the sense smoke sensor only causes glowing, can't detect the naked light fire of quick generation, powerless especially for blast; Feel infrared detection and suffer easily from human body, the interference of natural lights such as animal and the high temperature hot body and the sun, fire alarm is inaccurate.Purplish red outer two spectrum detection techniques in the past do not adopt the analysis-by-synthesis decision-making of microprocessor as the kernel control chip temporal information yet, and fire alarm judges that quick real-time is obviously not enough, also will influence the accuracy of fire alarm in case environment temperature changes.And our fast real-time purplish red outer detection technique, on the basis of infrared detection, in conjunction with the ultraviolet detection means, ultraviolet and infrared two kinds of signal characteristics in the while flame detection, carry out decision analysis with microprocessor,, can get rid of rapidly and disturb the output fire alarm in case take place unusually.
Microprocessor is analyzed infrared, the UV information of input, when having only infrared signal and UV signal to satisfy the condition of judging datonation-inhibition or fire simultaneously, and the ability output alarm signal.By merging the advantage of ultraviolet, infra red flame detection, overcome the contradiction of detection sensitivity and false alarm, both had high detection sensitivity, have the not available non-fire interference source recognition capability of conventional fire detector again.
Summary of the invention
Goal of the invention of the present utility model is: during at inflammable and explosive place incipient fire and blast generation, provide a kind of highly reliable in real time, with low cost, be easy to the fire of transplanting and popularizing and the monitoring technique that explodes, be that the utility model is a kind of purplish red outer composite flame detecting device, the internal circuit that it is characterized in that this purplish red outer composite flame detecting device comprises microprocessor, infrared tube, the ultraviolet pipe, the UV signal treatment circuit, the infrared signal treatment circuit, the pulse signal testing circuit, output control circuit, described ultraviolet pipe is connected with microprocessor by described pulse signal testing circuit.
In order to finish above-mentioned purpose the invention is to be achieved by following proposal: purplish red outer Composite Double spectral detection, microprocessor are characterized as the decision making package analytical technology scheme of the sensor signal on basis as kernel control chip with fire information.
According to substance combustion (blast) always with a series of physics, chemical changes such as cigarette, temperature, gas, light, especially during the solid-fuelled conflagration of alkane, alcohol, gas and oil and high-carbon (blast), the fastest transmission information be light (flame), because different substance combustions will produce different burning spectrum and spectral intensity, and burning spectrum also can be superimposed with such as the interference source of formations such as electromagnetic interference (EMI), sunshine, illumination light, various arc light and various rays to flame detecting.By test, as detecting foundation, the natural fire situation is accurately judged in a plurality of interrelated parametric synthesis analyses with distribute in the fire the strongest ultraviolet spectrum and infrared spectrum.
By to different combustible substances under varying environment flame and interference source purplish red outside feature extraction, set up the flame characteristic database, be stored in the microprocessor, as the partial reference foundation of judging fire, so that improve the accuracy that flame is judged.
On software design, based on the powerful microprocessor platform of performance, select that more excellent processing is infrared, UV information blending algorithm and fusion process be compiled into control program at complex detector.Compensation is automatically implemented in the variation of non-pyric factor to external world simultaneously, and electrical interference and circuit effects of distribution parameters are handled automatically, can adjust detector sensitivity automatically according to the varying environment at scene.Raising is carried out analysis-by-synthesis, comparison to various information, according to certain logic and algorithm, gets rid of disturbing factor, confirms fire signal.
In sum, owing to adopted technique scheme, the beneficial effects of the utility model are:
This novel purplish red outer composite flame detecting device, be to judge whether to have taken place fire by ultraviolet and the infrared signal that detects simultaneously in the surrounding environment, the signal data that ultraviolet and infrared sensor collect is in real time sent into microprocessor, by microprocessor this real time data is compared with the common fire and the detonation fire characteristic database information that are stored in microprocessor internal, meet the feature of fire in case find the signal that collects in real time, detector is just exported fire alarm.This detection Detection Techniques response fast and reliable, the anti-wrong report ability of two spectral detection is strong, is easy to transplant and popularize.
Description of drawings
Fig. 1 is a functional-block diagram of the present invention;
Fig. 2 is UV signal treatment circuit figure of the present invention, comprises pulse detection and intensity detection two-way;
Fig. 3 is infrared signal treatment circuit figure of the present invention, comprises that direct current signal detects and the alternating current signal detection two-way;
Fig. 4 is a control program FB(flow block) of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalence or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
See also shown in Figure 1: the purplish red outer composite flame detecting technology of the present invention comprises that the vacuum ultraviolet plumber makes power supply and signal processing circuit, infrared tube and signal processing circuit, microprocessor and output control circuit unit.When working on power, vacuum ultraviolet photoelectric tube and infrared tube will detect ultraviolet ray and the infrared ray in the surveillance area at any time, and the conversion of signals that will collect in real time to be electric signal do decision analysis after signal processing circuit is input in the microprocessor after handling by control program, will export fire alarm in case meet fire characteristic.
The circuit of purplish red outer composite flame detecting device comprises vacuum ultraviolet pipe and operating circuit thereof, infrared tube and operating circuit thereof, microprocessor and output control unit circuit.Microprocessor Design is used in the fire detector, sends controller to by the continuous parameters that the fire initial stage is collected.Carry out corresponding analyzing and processing, judge whether breaking out of fire of scene by the main frame in the controller.This detection alarm mode is different from general fire detector, is physics and the chemical effect that is produced in combustion process by means of fire, changes the fire characteristic parameter into some and can survey signal.Utilize modern signal detection technique and disposal route, comprehensively judge, handle, reach the purpose of identification natural fire signal by the parameter that the fire parameter and the preceding several times collection of collection are stored.Detector not only can adapt to the variation of various ambient conditions like this, also has the adaptive ability of automatic adjustment operational factor, handles for fire signal and has opened up brand-new evolutionary path.Therefore the detection intellectuality makes detection find more objective, truer, more accurately the condition of a fire to have significantly reduced wrong report, has improved the reliability of system.
Signal in the ultraviolet pipe response flame, one the tunnel after the pulse signal deteching circuit is handled, send into the PIC microprocessor, ultraviolet pulse is carried out fragmentation count to be handled, another road is sent into the PIC microprocessor analysis to the UV radiation strength signal after amplification, noise reduction process, realize the detection to ultraviolet pipe signal.
As shown in Figure 2, day, blind type vacuum ultraviolet photoelectric tube only responded to the ultraviolet ray in 190 ~ 280nm wavelength coverage, and this wave band the strongest wave band of hydrocarbon combustion flame medium ultraviolet radiation just, in the UV signal treatment circuit, inverter circuit by formations such as V1, V2, V3, T1, + 15V voltage is become the alternating voltage more than the 300V, after rectification, filtering, current limliting, for the ultraviolet light fulgurite provides operating voltage.Simultaneously for guaranteeing that the ultraviolet plumber makes the stable of voltage, has designed voltage negative feedback circuit.Exist and intensity when reaching certain value as UV source, the ultraviolet tube discharge also forms pulse, and its signal enters CPU after treatment and analyzes, handles.
As shown in Figure 3, selected infrared tube peak wavelength is 4.4 μ m, and this wave band is the strongest wave band of hydrocarbon combustion flame intermediate infrared radiation just.The characteristic of infrared tube is equivalent to a photoresistance, it is very sensitive to ambient light, environment temperature, in side circuit, adopted the detection processing of infrared signal being carried out AC and DC, in circuit, increase the influence that impedance matching improves the infrared tube internal resistance; Increased filter capacitor and reduced of the influence of the thermonoise of infrared tube own signal; Utilize software to enforcement compensation such as environment temperatures simultaneously.
In the infrared signal treatment circuit, 6 pin of comparer N3 are infrared reference voltage, timing open and close by CPU control V6, obtain current environmental information and the correspondent voltage of infrared tube, the 7 pin output low levels of N 3 under the normal condition, exist and intensity when reaching certain value as infrared radiation source, N 3 output high level, its signal is imported CPU after treatment and is analyzed, handles.
In actual experiment, debugging, find, narrow to the processing and the compensation range of infrared signal, debug very difficultly, exist the good data of debugging that uncertain conditions such as variation had taken place again when testing in second day; Employing is handled the direct current signal of infrared signal, exists to be subjected to extraneous response big, compensates factors such as not necessarily reasonable.At these problems, in design, taked following measure:
1, adopts the variation of integrated temperature chip detection environment temperature, grope infrared the variation of temperature curve to be set up compensation meter, IR parameters is compensated by a large amount of experiments
2, adopt selective frequency amplifier circuit
3, gather alternating-current pulse signal and DC level two paths of signals simultaneously
4, the improvement of infrared tube signal software.
The double T selective frequency amplifier circuit is adopted in the processing of infrared signal, has effectively suppressed the influence of undesired signal, has improved the reliability of detector.Simultaneously gather alternating-current pulse signal and DC level two paths of signals again, by a series of processing, infra red flame signal in the special spectrum scope that detects that can be accurate and effective.Because environment temperature is bigger to the infrared device influence, we have also adopted temperature sensing circuit, and the compensate for ambient temperature influences infrared device;
According to detector control program FB(flow block) shown in Figure 4, control program is made temperature compensation according to environment temperature to ultraviolet and infrared sensor, compare with the fire characteristic data of storage in advance according to the purplish red external signal that collects in real time simultaneously, analyze by the decision making package of fire evaluation algorithm, make the whether judgement of fire.At first consider to reduce as far as possible the interference of Related Environmental Factors on the hardware handles to detector, promptly from environment, extract and measure the physical features parameter that fire phenomena shows, the feature that this physical parameter is showed in fire is refined and is simplified then, and this refinement and simplification are formed the technical detection algorithm that can realize.
Start powers on, and software systems bring into operation, and at first carries out initialize routine, to the IO port, and timer module, communication module is configured, and carries out self-check program then, the test stone signal lamp, whether output indicator light, sensor fault.After self check finished, system entered the periodic duty process, does not stop monitors sensor signal and handle communication function in this process.In the software systems, timer module and AD modular converter will be monitored the signal characteristic of ultraviolet and infrared sensor at any time.
Every 2.5ms is in the time, timer module and AD module will be every the signals of ultraviolet of 100 μ s detection and infrared sensor output, and analyze nearest several times data continuously, and the infrared and ultraviolet feature of the fire in the fire characteristic storehouse of storing in analysis result and the data-carrier store compared, if meet the datonation-inhibition signal fire characteristic in the fire characteristic storehouse, system will export datonation-inhibition fire alarm within 2.5ms.If do not meet datonation-inhibition fire alarm feature, then prolong analysis time, increase the data sampling number of analyzing continuously.If meet the common fiery feature in the fire characteristic storehouse, then system will export common fire alarm in 3s.Handle functions such as communication, log record simultaneously.
In the infinite loop course of work of system, will interrupt the fire alarm testing in per 10 minutes, carry out the fault self-checking of system, starting standard signal source tests to the output characteristics of ultraviolet and infrared sensor, detect the degree of fouling of detector glass window simultaneously, send to host computer simultaneously, remind operating personnel's maintenance or processing.
Preferred example described above only is that the present invention is set forth and illustrates, but is not limited to disclosed concrete any form, and it is possible carrying out many modifications and variations.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. purplish red outer composite flame detecting device, the internal circuit that it is characterized in that this purplish red outer composite flame detecting device comprises microprocessor, infrared tube, ultraviolet pipe, UV signal treatment circuit, infrared signal treatment circuit, pulse signal testing circuit, output control circuit, and described ultraviolet pipe is connected with described microprocessor by described pulse signal testing circuit.
2. purplish red outer composite flame detecting device according to claim 1 is characterized in that described infrared tube, ultraviolet pipe have sensor separately respectively, and the conversion of signals that is used for collecting in real time is an electric signal.
3. purplish red outer composite flame detecting device according to claim 1 is characterized in that described infrared signal treatment circuit adopts the double T selective frequency amplifier circuit, is used to suppress undesired signal.
4. purplish red outer composite flame detecting device according to claim 1 is characterized in that also comprising comparer (N3) in the described infrared signal treatment circuit, and 6 pin of this comparer (N3) are infrared reference voltage.
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| CN2011201229471U CN202033865U (en) | 2011-04-25 | 2011-04-25 | Ultraviolet and infrared composite flame detector |
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| CN2011201229471U CN202033865U (en) | 2011-04-25 | 2011-04-25 | Ultraviolet and infrared composite flame detector |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198604A (en) * | 2013-04-01 | 2013-07-10 | 西安北方光电科技防务有限公司 | Device and method capable of prompting reliability of mining gas pipeline fire detector |
| CN103985218A (en) * | 2014-05-16 | 2014-08-13 | 中国矿业大学 | Electromagnetic radiation detection device and method for potential fire danger of mine |
| CN104199117A (en) * | 2014-08-20 | 2014-12-10 | 湖北捷讯光电有限公司 | An infrared-ultraviolet composite flame detector and its detection method |
| CN105223863A (en) * | 2015-09-21 | 2016-01-06 | 黑龙江泰安防火防爆设备有限公司 | The time break point detection device |
| CN106023514A (en) * | 2016-07-25 | 2016-10-12 | 上海腾盛智能安全科技股份有限公司 | Wireless flame detection system |
| CN107895461A (en) * | 2017-12-19 | 2018-04-10 | 徐远帆 | A kind of domestic safety device |
| CN113409535A (en) * | 2021-04-29 | 2021-09-17 | 辛米尔视觉科技(上海)有限公司 | Tunnel flame detection system based on computer vision and artificial intelligence algorithm |
-
2011
- 2011-04-25 CN CN2011201229471U patent/CN202033865U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198604A (en) * | 2013-04-01 | 2013-07-10 | 西安北方光电科技防务有限公司 | Device and method capable of prompting reliability of mining gas pipeline fire detector |
| CN103985218A (en) * | 2014-05-16 | 2014-08-13 | 中国矿业大学 | Electromagnetic radiation detection device and method for potential fire danger of mine |
| CN103985218B (en) * | 2014-05-16 | 2016-10-26 | 中国矿业大学 | Mine hidden fire hazard electromagnetic radiation detecting device and method |
| CN104199117A (en) * | 2014-08-20 | 2014-12-10 | 湖北捷讯光电有限公司 | An infrared-ultraviolet composite flame detector and its detection method |
| CN105223863A (en) * | 2015-09-21 | 2016-01-06 | 黑龙江泰安防火防爆设备有限公司 | The time break point detection device |
| CN106023514A (en) * | 2016-07-25 | 2016-10-12 | 上海腾盛智能安全科技股份有限公司 | Wireless flame detection system |
| CN107895461A (en) * | 2017-12-19 | 2018-04-10 | 徐远帆 | A kind of domestic safety device |
| CN113409535A (en) * | 2021-04-29 | 2021-09-17 | 辛米尔视觉科技(上海)有限公司 | Tunnel flame detection system based on computer vision and artificial intelligence algorithm |
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