CN106768330B - A kind of flame detecting device based on spectrum - Google Patents
A kind of flame detecting device based on spectrum Download PDFInfo
- Publication number
- CN106768330B CN106768330B CN201611169560.5A CN201611169560A CN106768330B CN 106768330 B CN106768330 B CN 106768330B CN 201611169560 A CN201611169560 A CN 201611169560A CN 106768330 B CN106768330 B CN 106768330B
- Authority
- CN
- China
- Prior art keywords
- signal
- flame
- radiation
- change rate
- detecting device
- 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.)
- Active
Links
- 238000001228 spectrum Methods 0.000 title claims abstract description 50
- 230000005855 radiation Effects 0.000 claims abstract description 74
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 43
- 230000035945 sensitivity Effects 0.000 abstract description 12
- 238000002485 combustion reaction Methods 0.000 description 17
- 230000000875 corresponding effect Effects 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000002889 sympathetic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000736199 Paeonia Species 0.000 description 1
- 235000006484 Paeonia officinalis Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- -1 hydrogen compound Chemical class 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 210000000697 sensory organ Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
The present invention discloses a kind of flame detecting device based on spectrum, which includes radiation sensitive unit and data processing unit.Radiation sensitive unit includes the radiation for sensing first wave length and the first radiation sensor for exporting the first signal；Data processing unit includes control module, computing module and judgment module, and wherein control module is sensed for controlling the radiation sensitive unit with detecting frequency；Computing module is used to calculate the amplitude change rate of the first signal；Judgment module judges whether there is flame based on the amplitude change rate of the first signal.Flame detecting device according to the present invention based on spectrum can effectively avoid the influence of interference signal, have high response speed, response sensitivity and detection accuracy rate, realize the quick and precisely detection to flame.
Description
Technical field
The present invention relates to fire defector technical fields.More particularly, to a kind of flame detecting device based on spectrum.
Background technique
Fire detector is to detect in fire automatic alarm system to scene, and the equipment for finding fire is used for
Fire alarm and starting fire braking measure.Fire detector is system " sense organ ", its effect is in monitoring environment
Either with or without the generation of fire, once there is fire behavior, just by the feature physical quantity of fire, such as temperature, smog, gas and radiation light intensity
Etc. being converted into electric signal, and is acted immediately to fire alarm control unit and send alarm signal.Domestic and international main fire detection at present
Device type has smoke detector, temperature sensing fire detector, gaseous type fire detector and spectrum fire detector.Feel pyrotechnics
Calamity detector, temperature sensing fire detector and gaseous type fire detector are since its detection mechanism limits, to fire response time mistake
It is long, or even there is failing to report phenomenon since detection parameter can not reach detector.Since spectrum fire detector has response
The features such as speed is fast, detecting distance is remote and good environmental adaptability, so being generally used spectrum fire detector at present carries out fire
Calamity detection.
Any fuel, all can light waves such as outside radiating visible light and infrared ray to some extent in burning.Fuel is different,
The optical band given off is just different.Burning condition is different, and detectability of the Fire Radiation light wave on each wave band is also different.It is practical
In, hydrocarbon fire generated open fire when occurring has its distinctive spectral characteristic.The energy of fire source release is most of
Energy concentrates on infrared band and the infrared energy of different wave length is different.The song that 4.3-4.4 microns of infrared portion nearby occurs
Line convex portion is known as CO2The CO of sympathetic response2Atomic group luminescent spectrum, it is sent out than atoms other in flame, molecule or group
Threadiness or band spectrum out has absolutely big radiation intensity.According to flame spectrometry as a result, flame spectrum is with central wavelength
4.3-4.4 microns of wave crest is the most obvious, because of its energy magnitude highest, is conducive to improve detector sensitivity, and sunlight exists
This wave band has a stronger absorption peak, and common light can be neglected 4.3-4.4 micron wave strong point amount of radiation is also very faint
Slightly.So being typically chosen the 4.3-4.4 microns of anti-interference abilities for being conducive to enhance detector as detection wave band, improve reliable
Property.
Existing flame detecting device is to be carried out by sensing 4.3-4.4 micron wave length signal as characteristic wavelength mostly
Flame judgement, and Various Complex signal present in actually detected environment, as sunlight, arclight, the radiation of infrared spotlight and
Heat radiation etc. can equally contain this feature wavelength, cause the inaccuracy and high rate of false alarm of detection.To solve this problem, it develops
Double spectrum flame detecting devices, by selecting another spectral signal as reference signal, binding characteristic wavelength signals and with reference to letter
Number carry out flame judgement simultaneously.Since spectrum amplitude itself is not fixed value, according to whether there are multiple selected spectrum or respectively
Whether the amplitude of selected spectrum, which reaches threshold value, can not effectively distinguish flame and interference signal, therefore its false alarm prevention effect and pay no attention to
Think.In, although double spectrum flame detectors combine the infra-red radiation of two different wave lengths, but still height cannot be solved very well
The problem of mutual restriction that sensitivity and false alarm prevention require: the sensitivity of detector is arranged too low, is easy to appear failing to report phenomenon；
And the sensitivity setting of detector is excessively high, the output amplitude ratio of interference signal also can satisfy its two channels fire completely
Signal amplitude ratio is easy to cause wrong report, such as lightning, electric welding light, environment light to influence.So current double spectrum fire defectors
Device or sensitivity is low or false alarm prevention performance is undesirable, is not able to satisfy fire automatic alarm system to fire detector
Requirement.Due to being frequently present of possible false alarm source, such as strong vehicle lamp light source in the detection range of flame detector
Deng there is very high rate of false alarm in existing flame detector, brings very big inconvenience to the development of fire-fighting work.
Can be effectively reduced combustion flame detector rate of false alarm therefore, it is necessary to one kind, improve alarm accuracy based on light
The flame detecting device of spectrum.
Summary of the invention
In order to improve the above problem, the purpose of the present invention is to provide a kind of flame detecting devices, can be effectively reduced combustion
It makes a fire flame detector rate of false alarm, improves alarm accuracy.
To achieve the goal, the present invention is adopted the following technical solutions:
A kind of flame detecting device based on spectrum, the flame detecting device include radiation sensitive unit and data processing list
Member, wherein
Radiation sensitive unit, including sensing the radiation of first wave length and the first radiation sensor of the first signal of output, the
One signal is the characteristic wavelength signal of combustion flame.First radiation sensor is used for the radiation signal of sensed characteristic wavelength and should
Radiation signal is converted into electric signal output.The intensity of radiation signal and the amplitude of electric signal are linearly positively correlated, i.e. the width of electric signal
Value is for reflecting the intensity of corresponding radiation signal.
Data processing unit, including control module, computing module and judgment module, wherein
Control module is sensed for controlling radiation sensitive unit with detecting frequency, and the determination Ying Yiman of frequency is detected
For the purpose of sufficient detection demand, while matching with data processing speed and detection device reaction speed.
Computing module, for calculating the amplitude change rate of the first signal, the amplitude change rate of signal is letter in the unit time
The variable quantity of number amplitude.When computing module is calculated, amplitude change rate can select the adjacent difference in magnitude detected twice and phase
The quotient of time interval that neighbour detects twice indicates, also can be selected the difference in magnitude arbitrarily detected twice and accordingly detect twice when
Between the quotient that is spaced indicate.There is better real-time and high response by calculating adjacent calculated result detected twice
Speed has higher accuracy by calculating non-conterminous calculated result detected twice.But if calculate select when
Between be spaced it is too long, can extend obtain calculated result time, and further influence detection device timeliness.
Judgment module, the amplitude change rate based on the first signal judge whether there is flame.When flame combustion, radiant light
The amplitude of spectrum is in dynamic change.In particular, at the initial stage of flame combustion, the amplitude of radiation spectrum is significantly increased, is based on
This feature can be made whether the judgement there are flame according to the amplitude change rate of flame combustion characteristic wavelength.Existing inspection
To determinand, whether radiation feature wavelength carries out flame judgement in survey method, carries out flame judgement using existing detection method
When, the interference signal same or similar with sensing signal wavelength, the interference signal will be mistaken for flare up fire simultaneously if it exists
Further result in the wrong report of detection device.Detection device of the invention is using the amplitude change rate of flame combustion characteristic wavelength to combustion
It burns signal and interference signal distinguishes, reach and effectively avoid interference signal, improve the purpose of judging nicety rate.
Preferably, the comparison result of amplitude change rate and first threshold of the judgment module based on the first signal, judges whether
There are flames.First threshold is the numerical definiteness to the first signal amplitude change rate, and only the amplitude change rate of the first signal is full
Sufficient comparison result, flame judgment module are just judged as flame.By setting first threshold, the significantly more efficient exclusion a part of energy is dry
The influence for disturbing signal reaches higher judgment accuracy.
Preferably, first wave length is 4.3-4.4 microns.Any fuel, all can be to some extent to external radiation in burning
The light waves such as visible light and infrared ray.Fuel is different, and the optical band given off is just different.Burning condition is different, Fire Radiation light wave
Detectability on each wave band is also different.In practice, generated open fire when hydrocarbon fire occurs, has its peculiar
Spectral characteristic.The energy major part energy of fire source release concentrates on the infrared energy of infrared band and different wave length not
Together.The curved convex part that 4.3-4.4 microns of infrared portion nearby occurs is known as CO2The CO of sympathetic response2Atomic group luminescent spectrum,
The threadiness or band spectrum that it is issued than atoms other in flame, molecule or group have absolutely big radiation intensity.According to fire
Flame Spectroscopic analysis results, flame spectrum is the most obvious with 4.3-4.4 microns of central wavelength of wave crest, because of its energy magnitude highest,
Be conducive to improve detector sensitivity, and sunlight has a stronger absorption peak in this wave band, common light is in 4.3-4.4
Micron wave strong point amount of radiation is also very faint to be ignored.Be conducive to enhance so selecting 4.3-4.4 microns as detecting band
The anti-interference ability of detector improves reliability.
Preferably, radiation sensitive unit further comprises the second spoke for sensing the radiation of second wave length and exporting second signal
Sensor, amplitude change rate and second signal of the judgment module based on the first signal are penetrated, second wave length is different from first wave length, sentences
It is disconnected to whether there is flame.In the present invention, second signal is as reference signal, by combining with the amplitude change rate of the first signal
Flame is judged.When carrying out flame judgement, in order to exclude with amplitude change rate identical as selected characteristic wave spectrum
The influence of interference signal, further choosing second signal is reference signal.Second signal is another feature wave spectrum of flame,
And there is the interference signal possibility of amplitude change rate identical as the first signal and second signal same spectra will drop significantly simultaneously
It is low.Preferably, when there are second signal, there are flames for judgment module judgement.Therefore, which can be big
It is big to reduce rate of false alarm.
Second signal is interfered it is further preferred that there is faint interference signal in order to prevent, can be set
Two threshold values, when only meeting second signal intensity greater than second threshold, judgment module judges a stepping of going forward side by side there are second signal
The judgement of row flame.
It is further preferred that computing module further calculates the amplitude change rate of second signal, judgment module is based on first
The amplitude change rate of signal and the amplitude change rate of second signal judge whether there is flame.The first signal is obtained by calculating
The amplitude change rate of the amplitude change rate of amplitude change rate and second signal, only above-mentioned two signal is met the requirements simultaneously, is sentenced
Disconnected module is just judged as flame.The preferred flame detecting device has more preferably accuracy in detection and rate of false alarm.
It is further preferred that second wave length is 3.8 microns.Hydrocarbon fire generated open fire when occurring, has
Its distinctive spectral characteristic.The energy major part energy of fire source release concentrates on the infrared energy of infrared band and different wave length
Amount is different.Other than 4.3-4.4 microns of spectrum have good detectability, 3.8 microns of spectrum equally has good
Detectability.
Preferably, radiation sensitive unit further comprises the third spoke for sensing the radiation of third wavelength and exporting third signal
Sensor is penetrated, amplitude change rate and third signal of the judgment module based on the first signal judge whether there is flame.
It is further preferred that flame is not present in judgment module judgement when there are third signal.When due to flame combustion not
There are the UV signals of certain particular range of wavelengths, can be by third radiation sensor to the UV signal of wavelength within the scope of this
It is detected, to exclude the presence of flame.When judging, preferably the judgement of third signal existence has height to judgment module
Priority: if detecting there are third signal, this detection terminates, flame judgment module judgement be not present flame；If visiting
It measures and third signal is not present, then continue the calculating of the first signal amplitude change rate and the judgement of flame.In this way it is possible to
Quickening judges speed, reduces calculating process, improves detector sensitivity.Further, there is faint interference in order to prevent
Signal interferes third signal, can set third threshold value, when only meeting third signal strength greater than third threshold value, sentences
Disconnected module judges third signal, and the judgement of further progress flame.
It is further preferred that third wavelength is 254 nanometers.Absorption due to atmosphere to short wave ultraviolet makes sun spoke
It penetrates and is irradiated to the long wave ultraviolet that the ultraviolet light of earth surface only has wavelength to be greater than 0.29 micron, 0.29 micron of shortwave speed below
Long radiation seldom observes at the earth's surface.Therefore, using 0.29 micron of wave band below as purple in flame detector design
Outside line detection zone, the ultraviolet radiation sensor to work in the detection zone is not responding to solar radiation, so as to avoid daylight
Interference.In the UV signal of burning radiation, the signal that wavelength is 254 nanometers has better detection feature.
Beneficial effects of the present invention are as follows:
Based on the flame detecting device of spectrum in the present invention, a radiation sensor is selected to carry out the sense of characteristic wavelength to environment
It surveys, flame is judged whether there is according to the change rate of the amplitude of the signal characteristic wavelength.In addition, selecting another radiation sensor pair
Environment carries out the sensing of another reference wavelength, and the amplitude change rate based on characteristic wavelength and reference wavelength judges whether there is fire
Flame.Further, interference signal when another radiation sensor being selected to judge burning excludes.Flame inspection according to the present invention
The influence of interference signal can effectively be avoided by surveying device, have high response speed, response sensitivity and detection accuracy rate, can
Realize effective detection to flame.
Flame detection device according to the present invention can be widely used for the combustion flame detection to environment to be measured, and be particularly suitable for
In the quick detection for the explosion and burning that coal mine occurs.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 shows the structure chart of according to embodiments of the present invention 1 flame detecting device.
Fig. 2 shows the structure charts of according to embodiments of the present invention 2 flame detecting device.
Fig. 3 shows the structure chart of according to embodiments of the present invention 3 flame detecting device.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings
It is bright.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
Embodiment 1
A kind of flame detecting device based on spectrum, the flame detecting device include radiation sensitive unit and data processing list
Member, wherein radiation sensitive unit includes the first radiation sensor of the radiation and the first signal of output for sensing first wave length,
First signal is the characteristic wavelength signal of combustion flame.First radiation sensor is used for the radiation signal of sensed characteristic wavelength and will
The radiation signal is converted into electric signal output.The intensity of radiation signal and the amplitude of electric signal be linearly positively correlated, i.e. electric signal
Amplitude is used to reflect the intensity of corresponding radiation signal.Data processing unit, including control module, computing module and judgment module,
Wherein control module is sensed for controlling radiation sensitive unit with detecting frequency, and the determination for detecting frequency should be to meet detection
For the purpose of demand, while matching with data processing speed and detection device reaction speed.Computing module is for calculating the first letter
Number amplitude change rate, the amplitude change rate of signal is the variable quantity of signal amplitude in the unit time.Computing module is calculated
When, amplitude change rate can select the quotient of the adjacent difference in magnitude detected twice and the adjacent time interval detected twice to indicate,
Also the quotient of the difference in magnitude and corresponding time interval detected twice arbitrarily detected twice can be selected to indicate.By calculating adjacent two
Secondary detected calculated result has better real-time and high corresponding speed, is obtained by calculating non-conterminous detection twice
Calculated result have higher accuracy.But if it is too long to calculate the time interval selected, it can extend and obtain calculated result
Time, and further influence the timeliness of detection device.Judgment module judges whether to deposit based on the amplitude change rate of the first signal
In flame.When flame combustion, the amplitude of radiation spectrum is in dynamic change.In particular, in the initial stage of flame combustion, spoke
The amplitude for penetrating spectrum is significantly increased, and is based on this feature, can be carried out according to the amplitude change rate to flame combustion characteristic wavelength
With the presence or absence of the judgement of flame.To determinand, whether radiation feature wavelength carries out flame judgement in existing detection method, uses
When existing detection method carries out flame judgement, interference signal identical with sensing signal wavelength, the interference signal will if it exists
It can be mistaken for flare up fire and further result in the wrong report of detection device.Interference signal is generally fixed amplitude intensity or amplitude
The little signal of Strength Changes, detection device of the invention can effectively distinguish burning signal and interference signal, and reaching has
Effect avoids interference signal, improves the purpose of judging nicety rate.
In the flame detecting device based on spectrum of the present embodiment, selecting first wave length is 4.3-4.4 microns, for carbon
The detection of hydrogen compound fire generated open fire when occurring.
When the flame detecting device based on spectrum of the present embodiment carries out flame judgement, judgment module is based on the first signal
The comparison result of amplitude change rate and first threshold, judges whether there is flame.First threshold is changed to the first signal amplitude
The numerical definiteness of rate, the amplitude change rate of only the first signal meet comparison result, and flame judgment module is just judged as flame.It is logical
Setting first threshold is crossed, the significantly more efficient influence for excluding a part of interference signal of energy reaches higher judgment accuracy.Into one
Step, if the amplitude change rate of the first signal is greater than the first threshold of setting, judgment module is judged as flame.First threshold it is big
It is small to need to be adjusted according to actual detection.A kind of possible adjustment mode are as follows: increase corresponding threshold in order to reduce rate of false alarm
Value, or respective threshold is reduced in order to improve sensitivity, to obtain optimal detection result.
By the judgement to characteristic wavelength amplitude change rate, flame being judged to, response speed controlled in 1 second, even
In 500 milliseconds.Flame detecting device based on spectrum of the invention has high response speed, response sensitivity and accuracy rate.
It is connect according to the present invention based on the flame detecting device of spectrum with suppression combustion device, suppression combustion device, control fire can be triggered early
The range and intensity of flame burning reduce the harm of burning bring and loss.
Test of the flame detection device of the embodiment to sunlight, car light, air-heater, infrared spotlight and arclight
It does not report by mistake.
Embodiment 2
Fig. 2 shows a kind of flame detecting devices based on spectrum according to embodiment 2, exist with the difference of embodiment 1
In radiation sensitive unit further comprises the second radiation sensor for sensing the radiation of second wave length and exporting second signal, is sentenced
Disconnected amplitude change rate and second signal of the module based on the first signal, second wave length are different from first wave length, judge whether there is
Flame.In the present invention, second signal carries out flame by combining with the amplitude change rate of the first signal as reference signal
Judgement.When carrying out flame judgement, in order to exclude the interference signal with amplitude change rate identical as selected characteristic wave spectrum
It influences, further choosing second signal is reference signal.Second signal is another feature wave spectrum of flame, and has simultaneously
The interference signal possibility of amplitude change rate identical as the first signal and second signal same spectra will substantially reduce, therefore, this
Flame detecting device in invention based on spectrum can substantially reduce rate of false alarm.
In the present embodiment, second wave length is 3.8 microns.Hydrocarbon fire generated open fire when occurring, has it
Distinctive spectral characteristic.The energy major part energy of fire source release concentrates on the infrared energy of infrared band and different wave length
It is different.In addition to 4.3-4.4 microns of spectrum have good detectability other than, 3.8 microns of spectrum equally have it is good can
Detection property.
When flame detecting device in the present embodiment based on spectrum carries out flame judgement, when there are second signal, judgement
There are flames for module judgement.Further, there is faint interference signal in order to prevent to interfere second signal, Ke Yishe
Determine second threshold, when only meeting second signal intensity greater than second threshold, judgment module judgement goes forward side by side one there are second signal
Step carries out the judgement of flame.
Another preferred judgment mode of the present embodiment are as follows: computing module further calculates the amplitude variation of second signal
The amplitude change rate of rate, amplitude change rate and second signal of the judgment module based on the first signal judges whether there is flame.It is logical
The amplitude change rate for calculating the amplitude change rate and second signal that obtain the first signal is crossed, the amplitude of preferably above-mentioned two signal becomes
Rate is met the requirements simultaneously, and judgment module is just judged as flame.When the amplitude change rate of first and second signals is all met the requirements,
Enough influences for excluding most interference signals, so that detecting ring to generation based on the flame detecting device of spectrum in the present invention
The explosion and burning in border have high accuracy in detection and extremely low rate of false alarm.
Embodiment 3
Fig. 3 shows a kind of flame detecting device based on spectrum according to embodiment 3, exists with the difference of embodiment 1
In radiation sensitive unit further comprises the third radiation sensor for sensing the radiation of third wavelength and exporting third signal, is sentenced
Disconnected amplitude change rate and third signal of the module based on the first signal judge whether there is flame.
When flame detecting device in the present embodiment based on spectrum is judged, when there are third signal, judgment module
Flame is not present in judgement.UV signal is not present when due to flame combustion, it can be by third radiation sensor to UV signal
It is detected, is burnt to exclude environment to be measured.Judgment module when judging, carries out third signal existence first
Judgement: if detecting there are third signal, this detection terminates, and flame is not present in the judgement of flame judgment module；If detecting
There is no third signals, then continue the calculating of the first signal amplitude change rate and the judgement of flame.Preferentially third signal is carried out
Judgement, is judged after being excluded, and can be accelerated to judge speed, be reduced calculating process, improve detector sensitivity.Into one
, there is faint interference signal in order to prevent and interfere to third signal, can set third threshold value in step ground, only meet the
When three signal strengths are greater than third threshold value, judgment module judges third signal, and the judgement of further progress flame.
Third wavelength is 254 nanometers in the present embodiment.Absorption due to atmosphere to short wave ultraviolet, shines solar radiation
It is mapped to the long wave ultraviolet that the ultraviolet light of earth surface only has wavelength to be greater than 0.29 micron, 0.29 micron of long spoke of shortwave speed below
It penetrates and seldom observes at the earth's surface.Therefore, using 0.29 micron of wave band below as ultraviolet light in flame detector design
Detection zone, the ultraviolet radiation sensor to work in the detection zone are not responding to solar radiation, so as to avoid the dry of daylight
It disturbs.In the UV signal of burning radiation, the signal that wavelength is 254 nanometers has better detection feature.
Embodiment 2 can be used in combination with embodiment 3.
By testing above-described embodiment, based on the flame detecting device of spectrum to interfering signal in the present invention
With extremely strong immunocompetence:
1, the sunlight of direct projection or reflection；
2, the Chinese herbaceous peony headlamp that power is 100 watts at 200 meters of distance；
3, riflery flame at 300 meters of distance；
4, the heat radiation for the air-heater that power is 500 watts at 400 meters of distance；
5, the infrared spotlight that power is 200 watts at 500 meters of distance radiates；
6, at 500 meters of distance current strength be 200 peaces arclights.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (8)
1. a kind of flame detecting device based on spectrum, which is characterized in that the flame detecting device includes
Radiation sensitive unit, including sensing the radiation of first wave length and exporting the first radiation sensor of the first signal, described the
One wavelength is 4.3-4.4 microns；
Data processing unit, including
Control module is sensed for controlling the radiation sensitive unit with detecting frequency；
Computing module, for calculating the amplitude change rate of the first signal；With
Judgment module, the amplitude change rate based on the first signal judge whether there is flame, specifically, judgment module is based on first
The amplitude change rate of signal and the comparison result of first threshold, judge whether there is flame.
2. flame detecting device according to claim 1, which is characterized in that the radiation sensitive unit further comprises sense
It surveys the radiation of second wave length and exports the second radiation sensor of second signal, the judgment module is based on first signal
Amplitude change rate and second signal, the second wave length are different from the first wave length, judge whether there is flame.
3. flame detecting device according to claim 2, which is characterized in that when there are second signal, the judgement mould
There are flames for block judgement.
4. flame detecting device according to claim 3, which is characterized in that the computing module further calculates the second letter
Number amplitude change rate, the amplitude change rate of amplitude change rate and second signal of the judgment module based on first signal
Judge whether there is flame.
5. flame detecting device according to claim 2, which is characterized in that the second wave length is 3.8 microns.
6. flame detecting device according to claim 1, which is characterized in that the radiation sensitive unit further comprises sense
It surveys the radiation of third wavelength and exports the third radiation sensor of third signal, the judgment module is based on first signal
Amplitude change rate and third signal judge whether there is flame.
7. flame detecting device according to claim 6, which is characterized in that when there are third signal, the judgement mould
Flame is not present in block judgement.
8. flame detecting device according to claim 7, which is characterized in that the third wavelength is 254 nanometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611169560.5A CN106768330B (en) | 2016-12-16 | 2016-12-16 | A kind of flame detecting device based on spectrum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611169560.5A CN106768330B (en) | 2016-12-16 | 2016-12-16 | A kind of flame detecting device based on spectrum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106768330A CN106768330A (en) | 2017-05-31 |
| CN106768330B true CN106768330B (en) | 2019-02-26 |
Family
ID=58892356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611169560.5A Active CN106768330B (en) | 2016-12-16 | 2016-12-16 | A kind of flame detecting device based on spectrum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106768330B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108765863A (en) * | 2018-09-06 | 2018-11-06 | 无锡圣敏传感科技股份有限公司 | A kind of flame detector and flame detecting alarm system |
| CN109682475A (en) * | 2018-12-29 | 2019-04-26 | 南京林业大学 | A kind of wooden dust flame detecting device and method based on potassium element |
| CN112837495B (en) * | 2019-11-25 | 2023-07-04 | 宏力实业股份有限公司 | Flame detection method |
| CN114708559B (en) * | 2022-05-31 | 2022-11-04 | 杭州微影软件有限公司 | Image processing method and device, thermal imaging equipment and storage medium |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100590671C (en) * | 2005-07-22 | 2010-02-17 | 公安部沈阳消防研究所 | Bi wave band infra red flame detector and its detecting method |
| CN201034728Y (en) * | 2007-04-18 | 2008-03-12 | 刘飞 | Intelligent flame testing apparatus |
| US7728736B2 (en) * | 2007-04-27 | 2010-06-01 | Honeywell International Inc. | Combustion instability detection |
| CN201867924U (en) * | 2010-11-15 | 2011-06-15 | 上海翼捷工业安防技术有限公司 | Three-wavelength infrared flame detector |
| CN102496236B (en) * | 2011-12-27 | 2013-10-02 | 公安部沈阳消防研究所 | Direct-injection type flame detector with self-checking light source and flame detection method |
| CN206248213U (en) * | 2016-12-16 | 2017-06-13 | 君都智能科技(上海)有限公司 | A kind of flame detecting device based on spectrum |
-
2016
- 2016-12-16 CN CN201611169560.5A patent/CN106768330B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106768330A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106768330B (en) | A kind of flame detecting device based on spectrum | |
| US4296324A (en) | Dual spectrum infrared fire sensor | |
| EP2815388B1 (en) | Combustion product detection | |
| KR101604571B1 (en) | Three wavelength type infrared flame detector having ultraviolet sensor | |
| CA2236784C (en) | Fire detection method and apparatus using overlapping spectral bands | |
| CN206248213U (en) | A kind of flame detecting device based on spectrum | |
| NO167342B (en) | DUAL CHANNEL FIRE SENSOR. | |
| US4199682A (en) | Fire and explosion detection apparatus | |
| EP1894178B1 (en) | A flame detector and a method | |
| CN202033865U (en) | Ultraviolet and infrared composite flame detector | |
| CN202195883U (en) | High-speed ultraviolet flame detector | |
| CN108010254A (en) | One kind is based on four wave band infrared flame detectors and its flame identification algorithm | |
| JP7103419B2 (en) | Receiver, fire detection system and fire detection method | |
| CN106408843B (en) | A kind of three wave band infrared flame detectors having automatic calibration function | |
| GB2372317A (en) | Infrared flame detection sensor | |
| CN106128008B (en) | A kind of Spark plug optical fiber sensor system | |
| US4241258A (en) | Ultraviolet fire detector | |
| CN201707755U (en) | Triple-band infrared flame detector | |
| Le Maoult et al. | Fire detection: a new approach based on a low cost CCD camera in the near infrared | |
| CA2553847A1 (en) | Method and apparatus for optical detection of hydrogen-fueled flames | |
| CN206249521U (en) | A kind of false alarm prevention spectrum flame detector | |
| Sivathanu et al. | Fire detection using time series analysis of source temperatures | |
| CN117636565B (en) | Multispectral flame detection system based on spectral feature data fusion | |
| CN205958454U (en) | Dangerous gas monitoring device that leaks of reflective infrared laser industry of self -adaptation | |
| CN111192431A (en) | Single ultraviolet flame detector and false alarm prevention method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ma Xiangle Inventor before: Ma Xiangle Inventor before: Mao Linshuang |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |