CN202195883U - High-speed ultraviolet flame detector - Google Patents
High-speed ultraviolet flame detector Download PDFInfo
- Publication number
- CN202195883U CN202195883U CN2011202049438U CN201120204943U CN202195883U CN 202195883 U CN202195883 U CN 202195883U CN 2011202049438 U CN2011202049438 U CN 2011202049438U CN 201120204943 U CN201120204943 U CN 201120204943U CN 202195883 U CN202195883 U CN 202195883U
- Authority
- CN
- China
- Prior art keywords
- ultraviolet
- fire
- microprocessor
- circuit
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Fire-Detection Mechanisms (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The present utility model discloses a novel high-speed ultraviolet flame detector. The response time of the high-speed ultraviolet flame detector on fire hazards is 5ms, and the detection sensitivity is 50m (standard gasoline fire). An interior circuit of the high-speed ultraviolet flame detector comprises a microprocessor, an ultraviolet tube, an ultraviolet signal processing circuit, a pulse signal detecting circuit, an output control circuit and an ultraviolet self-checking circuit. The ultraviolet tube is used for detecting ultraviolet signals in flame, the microprocessor is used for analyzing and processing the ultraviolet signals, and the ultraviolet tube is connected with the microprocessor through the pulse signal detecting circuit. When ultraviolet radiation signals collected from a surrounding environment and sent by the ultraviolet photoelectric tube are received by the microprocessor, the microprocessor will be used for comparing the ultraviolet radiation signals with fire hazard characteristic information stored in the microprocessor, and fire alarm signals will be output when the fire hazard characteristic is fulfilled by the signals, otherwise the next working cycle will be started to continue monitoring. The fire hazard detection technology is rapid and reliable in response, the anti false alarm capability is strong, and the technology is easy to transplant and popularize.
Description
Technical field
The utility model relates to a kind of employing high speed ultraviolet light photo flame detecting technology, relates to the field that all needs fast, reliably carry out detection.
Background technology
Fire is one of crushing harm, and its direct economic loss is huge, and the frequency of generation occupies first of the various disasters.It not only causes environmental pollution, and causes disruption of ecological balance, even has caused great casualties and property loss.Flame detector is the information source of surveying and forecasting fire, and the height of its sensitivity, reliability, response speed, antijamming capability and rate of false alarm has directly determined the success or failure of detection and forecast.Particularly colliery, power station, warehouse, the oil station, inflammable and explosive places such as chemical industry and dangerous material production, storage, if manual patrol is leaned in the monitoring of fire, 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 the ultraviolet light fulgurite to carry out flame detecting; Combine processing, the judgement of microprocessor simultaneously, detection of fires was taken measures with regard to rapid warning reminding staff in the incipient stage of fire quickly and accurately; Avoid fermenting into large-sized fire, reduce 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 maybe; According to the spectrum signature of 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 reporting to the police accurately and response fast, the structure that is easy to transplant and be applicable to the datonation-inhibition system of self-extinguishing are our urgent problems.
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); What transmit information the soonest is light (flame), and it is the fastest therefore surveying light (flame).
The flame detector product overwhelming majority is temperature sensitive type, ionic smoke sensor type or photoelectric smoke type fire detecting and alarm device at present.Simple temperature sensitive type detector is only responsive to temperature information, and can not distinguish temperature variation is owing to fire or other reason; Ion smoke detector is slower to the response of glowing, and especially isotopic ion is to environment and human body harmful, and all there are harm in preservation, transportation, use; Optical detector of fire smoke is to come detection of fires through surveying the bigger smoke particle of particle diameter, and it does not respond the invisible cigarette of particle diameter less than 0.4um, and can not distinguish the signals such as kitchen cigarette, water vapor of fire signal and non-fire, and rate of false alarm is higher.So seek new detection mechanism, improve the detection performance of existing flame detecting device, research advanced person fire determination methods accurately is to solve the high rate of false alarm of fire detector, muting sensitivity and key of problem such as fire low-response are belonged to.
Ultraviolet detector only responds the ultraviolet ray in 185～260nm narrow range, and insensitive to the light of other spectral range, utilizes it can the ultraviolet ray in the flame be detected.Because the optical wavelength that the sunshine and the non-purple material that arrive ground under the atmospheric envelope send as the electric light source of glass bulb is all greater than 300nm, so the 220m of flame detecting～280nm middle ultraviolet band belongs to solar spectrum blind area (day blind area).The ultraviolet flame Detection Techniques make system avoid the complex background that the most powerful lamp one sun causes, and make that the burden of information processing greatly alleviates in system.So reliability is higher, it is the photon detection means in addition, thereby signal to noise ratio (S/N ratio) is high, has atomic Testing of Feeble Signals ability, and in addition, it also has the characteristics that the reaction time is exceedingly fast.
The utility model content
The goal of the invention of the utility model is: to the problem of above-mentioned existence; A kind of high speed ultraviolet flame detector is provided: the high speed ultraviolet flame detector; The internal circuit that it is characterized in that this high speed ultraviolet flame detector comprises microprocessor, ultraviolet pipe, UV signal treatment circuit, pulse signal testing circuit, output control circuit and ultraviolet self-checking circuit; This ultraviolet pipe is used for the UV signal of flame detection; Said microprocessor is used for analyzing, handling UV signal, and said ultraviolet pipe is connected with said microprocessor through said pulse signal testing circuit.< 5ms, detection sensitivity is greater than 50m to response time of fire to it is characterized in that this detector.Detector is provided with said ultraviolet self-checking circuit, is used to judge the working condition of ultraviolet pipe.
This detector detector improves the UV signal in the flame detection, through opto-electronic conversion, input, conditioning, sends in the microprocessor, analyzes, handles, judges whether to exist fire alarm.Simultaneously probe designs the ultraviolet self-checking circuit, through the ultraviolet self check, can judge the working condition of ultraviolet pipe, overcome the influence of the variation of environmental factor to detector, improve reliability.
In order to accomplish above-mentioned purpose the invention is to be achieved through following proposal: through the high speed ultraviolet detector ultraviolet spectrum in the flame is detected; As kernel control chip, be characterized as the decision making package analytical technology scheme of the sensor signal on basis with microprocessor 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); What transmit information the soonest is 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.Through test, as detecting foundation, the natural fire situation is accurately judged in a plurality of interrelated parametric synthesis analyses with the strongest ultraviolet spectrum that distributes in the fire.
Through to the flame of different combustible substances under varying environment and the ultraviolet feature extraction of interference source, 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,, select more excellent processing uv information, environmental disturbances information at detector, be compiled into control program through blending algorithm and fusion process based on the powerful microprocessor platform of performance.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 effect of the utility model is:
This novel high speed ultraviolet flame detector; Be through detecting UV signal and the environmental change in the surrounding environment simultaneously; Comprehensively judge whether to have taken place fire, ultraviolet is gathered in real time, is handled in real time, by the microprocessor of 16 bit 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 characteristic of fire in case find the signal that collects in real time, detector is just exported fire alarm.The response time that guarantees its fire fire, < 5ms, detection sensitivity was greater than 50m (normal benzine fire).This detection Detection Techniques response fast and reliable, anti-wrong report ability is strong, is easy to transplant and popularize.
Description of drawings
Fig. 1 is the functional-block diagram of the utility model;
Fig. 2 is the UV signal treatment circuit figure of the utility model, comprises pulse detection and intensity detection two-way;
Fig. 3 is the control module treatment circuit of the utility model;
Fig. 4 is the control program FB(flow block) of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.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 characteristic in this instructions (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalence or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
See also shown in Figure 1: the utility model high speed ultraviolet flame Detection Techniques comprise that the vacuum ultraviolet plumber makes power supply and signal processing circuit, ultraviolet self-test signal treatment circuit, microprocessor and output control circuit unit.When working on power; The vacuum ultraviolet photoelectric tube is with the ultraviolet ray in the detection at any time surveillance area; And the conversion of signals that will collect in real time is that electric signal is after after the signal processing circuit processing; Be input in the microprocessor and do decision analysis, will export fire alarm in case meet fire characteristic through control program.
The circuit of high speed ultraviolet flame detector comprises vacuum ultraviolet pipe and operating circuit thereof, ultraviolet self-checking circuit, microprocessor and output control unit circuit.Be used in microprocessor Design in the fire detector, send controller to through 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 in combustion process, is produced 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 through 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 the condition of a fire to have significantly reduced wrong report more objective, more truly, more accurately, 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 handle, another road is sent into the PIC microprocessor analysis to the UV radiation strength signal after amplification, noise reduction process, realizes the detection to ultraviolet pipe signal.Ultraviolet is run well bad, directly influences the performance of extinguishing device, and we have designed ultraviolet pipe self-checking circuit, regularly to the self check of ultraviolet pipe, so that judge the quality of ultraviolet detector.Simultaneously,, also can obtain the variation of environmental information, for processor judges that accurately fire provides support through self check.
As shown in Figure 2; Day blind type vacuum ultraviolet photoelectric tube only responds 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 through 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 WV.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 gets into CPU after treatment and analyzes, handles.
As shown in Figure 3, the control circuit of ultraviolet detector comprises power control unit, ultraviolet self-test unit, UV signal processing, pollutes input and parts such as output, fire alarm detection and output.
In fact the ultraviolet detector signal Processing is exactly that photoelectricity is handled, and outer photoelectric tube induces electric signal to the UV reactive in the flame.The fundamental purpose of signal Processing is to restrain noise to greatest extent, extracts the useful information that signal carries.
Because the output signal of ultraviolet detector is very faint, this is just very high to the requirement of ultraviolet light photo signal processing circuit.Faint optical signal converts to after the electric signal through UV photodetector, also will pass through various signal Processing such as amplification, filtering.The fundamental purpose of Photoelectric Signal Processing is to restrain noise to greatest extent, extracts the useful information that signal carries.Therefore, the design of photoelectric detective circuit will be considered from three aspects:
The whole signal to noise ratio (S/N ratio) of circuit is high;
Measured signal does not have frequency distortion;
Reduce the introducing of new noise as far as possible.
The self check of ultraviolet light fulgurite and pollution detection:
Control the switching of Q6 through the RC2 mouth of CPU, thereby control the uviol lamp time opening, by ultraviolet pipe response output, through detecting the pulse data characteristic, the analysis pulse data is judged the good, bad of ultraviolet pipe.If do not detect pulse data,, the degree of fouling of window uviol do not have data in detecting yet, and detector newspaper intelligent object fault if in the degree of fouling of window uviol detects, data are arranged, should be reported the window pollution fault; If there are data not report to the police, explain that the sensitivity of ultraviolet light fulgurite reduces, and should change the ultraviolet light fulgurite.
The UV photodetector internal signal is handled:
1. judge fire alarm
Condition according to pulse signal is analyzed is come the condition as detector judgement fire.Satisfy condition, then output alarm signal.
2. ultraviolet light fulgurite self-excitation
Can judge self-exciting contion as detector through analyzing number of pulse signals.Satisfy condition, then export the self-excitation fault-signal.
3. the degree of fouling of window uviol detects
The degree of fouling of window uviol, the ultraviolet ray transmitting glass that can influence in the flame shines the ultraviolet light fulgurite, seriously influences the detector detectivity.Detector has been installed ultraviolet source outside window, can be used for the degree of fouling of detection window uviol by detector timing controlled opening and closing ultraviolet source.Open the outer ultraviolet source of window; Detect pulse data; The table of comparisons through searching window degree of fouling and pulse data is (through repeating to do in a large number the degree of fouling test of detection window uviol; Can set up the table of comparisons of degree of fouling and pulse data), the degree of fouling of output uviol; If the pulse data that detects near zero, is reported the intelligent object fault.
According to detector control program FB(flow block) shown in Figure 4; Control program is made temperature compensation according to environment temperature to ultraviolet; Compare with the fire characteristic data of storage in advance according to the UV 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 characteristic that then this physical parameter is showed in fire is refined and is simplified, 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 got into the periodic duty process, in this process, did not stop monitors sensor signal and handled communication function.In the software systems, timer module and AD modular converter will be monitored the signal characteristic of Ultraviolet sensor at any time.
Every 4.5ms is in the time; Timer module and AD module will whenever detect the signal of a Ultraviolet sensor output at a distance from 100 μ s; And analyze nearest several times data continuously; And the infrared and ultraviolet characteristic of the fire in the fire characteristic storehouse of storing in analysis result and the data-carrier store compared, if meet the fire characteristic in the fire characteristic storehouse, system will export fire alarm within 5ms.
In the infinite loop course of work of detector, will interrupt the fire alarm testing in per 10 minutes, carry out the fault self-checking of system, start standard signal source the output characteristics of Ultraviolet sensor is tested, detect the degree of fouling of detector glass window simultaneously.
Above-mentioned preferred example only is that the present invention is set forth and explains, but is not limited to disclosed concrete any form, and it is possible carrying out many modifications and variation.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (2)
1. high speed ultraviolet flame detector; The internal circuit that it is characterized in that this high speed ultraviolet flame detector comprises microprocessor, ultraviolet pipe, UV signal treatment circuit, pulse signal testing circuit, output control circuit and ultraviolet self-checking circuit; This ultraviolet pipe is used for the UV signal of flame detection; Said microprocessor is used for analyzing, handling UV signal, and said ultraviolet pipe is connected with said microprocessor through said pulse signal testing circuit.
2. high speed ultraviolet flame detector according to claim 1 is characterized in that being provided with a voltage negative feedback circuit in the said UV signal treatment circuit of this detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202049438U CN202195883U (en) | 2011-06-17 | 2011-06-17 | High-speed ultraviolet flame detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202049438U CN202195883U (en) | 2011-06-17 | 2011-06-17 | High-speed ultraviolet flame detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202195883U true CN202195883U (en) | 2012-04-18 |
Family
ID=45950786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202049438U Expired - Fee Related CN202195883U (en) | 2011-06-17 | 2011-06-17 | High-speed ultraviolet flame detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202195883U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103488879A (en) * | 2013-09-09 | 2014-01-01 | 上海电控研究所 | Modeling compensation analyzing system and method for ultraviolet photoelectric tubes under high temperature condition |
| CN104501851A (en) * | 2014-12-05 | 2015-04-08 | 广东美的制冷设备有限公司 | Self-checking circuit, self-checking method and self-checking system for photosensitive element as well as air conditioner |
| CN106197671A (en) * | 2015-05-26 | 2016-12-07 | 阿自倍尔株式会社 | Flame detector system |
| CN107170173A (en) * | 2017-05-27 | 2017-09-15 | 重庆英卡电子有限公司 | Infrared and ultraviolet flame detector control system and its control method |
| CN109920875A (en) * | 2017-12-12 | 2019-06-21 | 中国科学院苏州纳米技术与纳米仿生研究所 | Solar blind ultraviolet detector, its production method and application |
| CN110827503A (en) * | 2019-10-11 | 2020-02-21 | 中国直升机设计研究所 | Circuit detection device and method of photosensitive flame detection system |
| CN117636559A (en) * | 2023-11-29 | 2024-03-01 | 营口世纪电子仪器股份有限公司 | High-speed high-precision flame detection device and method |
-
2011
- 2011-06-17 CN CN2011202049438U patent/CN202195883U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103488879A (en) * | 2013-09-09 | 2014-01-01 | 上海电控研究所 | Modeling compensation analyzing system and method for ultraviolet photoelectric tubes under high temperature condition |
| CN104501851A (en) * | 2014-12-05 | 2015-04-08 | 广东美的制冷设备有限公司 | Self-checking circuit, self-checking method and self-checking system for photosensitive element as well as air conditioner |
| CN106197671A (en) * | 2015-05-26 | 2016-12-07 | 阿自倍尔株式会社 | Flame detector system |
| CN106197671B (en) * | 2015-05-26 | 2019-12-13 | 阿自倍尔株式会社 | Flame detection system |
| CN107170173A (en) * | 2017-05-27 | 2017-09-15 | 重庆英卡电子有限公司 | Infrared and ultraviolet flame detector control system and its control method |
| CN109920875A (en) * | 2017-12-12 | 2019-06-21 | 中国科学院苏州纳米技术与纳米仿生研究所 | Solar blind ultraviolet detector, its production method and application |
| CN109920875B (en) * | 2017-12-12 | 2021-12-17 | 中国科学院苏州纳米技术与纳米仿生研究所 | Solar blind ultraviolet detector, manufacturing method and application thereof |
| CN110827503A (en) * | 2019-10-11 | 2020-02-21 | 中国直升机设计研究所 | Circuit detection device and method of photosensitive flame detection system |
| CN117636559A (en) * | 2023-11-29 | 2024-03-01 | 营口世纪电子仪器股份有限公司 | High-speed high-precision flame detection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202195883U (en) | High-speed ultraviolet flame detector | |
| CN202033865U (en) | Ultraviolet and infrared composite flame detector | |
| CN2932336Y (en) | Infrared and ultraviolet composite flame detector | |
| CN111779540B (en) | In-situ detection and remote monitoring analysis system and method for mine underground closed environment parameters | |
| US7214939B1 (en) | Ultra low power NDIR carbon dioxide sensor fire detector | |
| CN102496236B (en) | Direct-injection type flame detector with self-checking light source and flame detection method | |
| US20150293032A1 (en) | Unit and method for optical non-contact oil detection | |
| CN202731976U (en) | Mine gas fire-extinguishing explosion suppression device | |
| CN105354974A (en) | Flame detection method based on three-wavelength infrared flame detector | |
| CN103814287A (en) | Mercury gas sensing method using terahertz time-domain spectroscopy | |
| CN104458687A (en) | Device and method for identifying mine shaft water invasion resource based on laser induction and SIMCA classification method | |
| CN103198604B (en) | A kind of device and method promoting gas in mine pipeline fire detector reliability | |
| CN106768330B (en) | A kind of flame detecting device based on spectrum | |
| CN108010254A (en) | One kind is based on four wave band infrared flame detectors and its flame identification algorithm | |
| CN201707755U (en) | Triple-band infrared flame detector | |
| CN102128812B (en) | Laser remote energy supply-based device and method for detecting trace gas | |
| CN102842198A (en) | Identifying method and system for fire disaster | |
| CN202454031U (en) | Self-checking light source direct flame detector | |
| CN206248213U (en) | A kind of flame detecting device based on spectrum | |
| CN201374114Y (en) | Explosion-proof fire detecting device | |
| CN105004688B (en) | A kind of thermal power station's waste gas monitoring system | |
| CN109979154A (en) | Vertical double light path smoke detection labyrinth and its detection method | |
| CN205103145U (en) | All -round detection device of indoor gas | |
| CN201917998U (en) | Stand-alone anti-explosion alarm for inflammable gas | |
| CN2932335Y (en) | Double-wavelength infrared flame detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20170617 |