CN107328392A - Flame abnormal signal extracting method based on Euler's video enhancement techniques - Google Patents
Flame abnormal signal extracting method based on Euler's video enhancement techniques Download PDFInfo
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- CN107328392A CN107328392A CN201710542794.8A CN201710542794A CN107328392A CN 107328392 A CN107328392 A CN 107328392A CN 201710542794 A CN201710542794 A CN 201710542794A CN 107328392 A CN107328392 A CN 107328392A
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- 230000002159 abnormal effect Effects 0.000 title claims abstract description 45
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- 238000002485 combustion reaction Methods 0.000 abstract description 5
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
- G01J5/0018—Flames, plasma or welding
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- G—PHYSICS
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Abstract
The invention discloses a kind of flame abnormal signal extracting method based on Euler's video enhancement techniques, comprise the following steps：1）Signal acquisition：Gather flame video sequence signal；2）Pyramid decomposition：Flame video sequence is decomposed with pyramid decomposition to obtain the video sequence of different frequency bands；3）Time-domain filtering：Flame abnormal signal is extracted with bandpass filter；4）Small signals amplification：The flame abnormal signal of extraction is amplified processing；5）Video Composition：The flame abnormal signal of amplification and the flare up fire of former collection input are overlapped, the restructuring of flame video is completed, visualizes flame abnormal signal；The present invention is extracted using Euler's video enhancement techniques to flame abnormal signal, is had the advantages that simple to operate, cost is low, visualize, is particularly suitable for the research of the extraction to abnormal combustion signal.
Description
Technical field
The present invention relates to a kind of flame abnormal signal extracting method based on Euler's video enhancement techniques, belong to mine hoisting
Equipment technical field.
Background technology
At present, 80% energy comes from fossil fuel in the world, and the main energy sources resource of China is coal, that is to say, that I
State or even the whole world are all used as main energy-provision way to burn at present.Burning is not strange for we everyone.It is
Material vigorous oxidation and the phenomenon for lighting, generating heat, are also a kind of complicated chemical combination phenomenon also referred to as " fire ".Its life with us
Work is closely bound up, is widely used in the multiple fields such as industry, national defence, traffic.
Continuing to develop for society is so that the being on the rise the problems such as pollution of shortage of resources and environment.So improving energy profit
It is particularly important with rate and the discharge for reducing pollutant.And most energy are used to burn, therefore want to improve fossil fuel band
These problems come, the extraction to the abnormal signal in combustion process is then particularly important.
The technology for combustion diagnosis mainly has three classes at present.That is absorption spectrum class, such as tunable semiconductor laser absorption
Spectrum（TDLAS）Method；Emission spectrum class, such as laser-induced fluorescence spectroscopy method（LIF）, planar laser-induced fluorescence method (PLIF)
Etc. method；Non-linear spectral class, such as coherent antistockes Raman spectroscopy（CARS）, degeneration four-wave mixing spectrum (DFWM), partially
Vibrational spectrum (PS) etc..And these diagnostic methods are complicated to the extraction cost height of abnormal signal, processing in combustion process.
The content of the invention
The technical problem to be solved in the present invention is：A kind of flame abnormal signal based on Euler's video enhancement techniques is provided to carry
Method is taken, processing method simple the advantages of low with extraction cost can overcome the deficiencies in the prior art.
The technical scheme is that：A kind of flame abnormal signal extracting method based on Euler's video enhancement techniques, bag
Include following steps：
1）Signal acquisition：Gather flame video sequence signal；
2）Pyramid decomposition：Flame video sequence is decomposed with pyramid decomposition to obtain the video sequence of different frequency bands；
3）Time-domain filtering：Flame abnormal signal is extracted with bandpass filter；
4）Small signals amplification：The flame abnormal signal of extraction is amplified processing；
5）Video Composition：The flame abnormal signal of amplification and the flare up fire of former collection input are overlapped, flame is completed and regards
The restructuring of frequency, visualizes flame abnormal signal.
Described pyramid is gaussian pyramid, can effectively ensure that the flatness of image border.
The bandpass filter is ideal bandpass filter.
It is 120 frames and the high speed camera collection flame video sequence signal of the above with sample frequency.
The beneficial effects of the invention are as follows：The present invention is extracted using Euler's video enhancement techniques to flame abnormal signal
And abnormal signal Producing reason is analyzed, and then optimize combustion-powered apparatus, control the discharge of pollutant and prevent fire
Occur etc., the optimization of energy utilization rate and environment can be improved.The present invention has the advantages that simple to operate, cost is low, visualize, special
It is not suitable for the research of the extraction to abnormal combustion signal.
Brief description of the drawings
Fig. 1 is theory diagram of the invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment to invention be described further：
With reference to Fig. 1, a kind of flame abnormal signal extracting method based on Euler's video enhancement techniques of the present invention, including following step
Suddenly：
1）Signal acquisition：Flame video sequence signal is gathered using camera.Conventional video camera is usually 30 frames, 60 frames, only
It can be extracted for 15 ~ 30Hz frequency band signals, but general unstable flame has the abnormal signal of upper frequency, in order to more preferable
Extraction flame abnormal signal, can select the high speed camera that sample frequency is 120 frames and the above and flame video sequence adopted
Collection.
2）Pyramid decomposition：Flame video sequence is decomposed with pyramid decomposition to obtain the video sequence of different frequency bands
Row, in order to the extraction to each frequency range micro various signal.In order to accelerate the processing speed of image, image down sampling mistake can be added
Journey.Conventional image pyramid has laplacian pyramid and gaussian pyramid.Laplacian pyramid is by gaussian pyramid
Develop and come, and the pyramid is it cannot be guaranteed that the flatness of image border.Therefore the preferred gaussian pyramid of the application come to regarding
Frequency sequence image is handled.
3）Time-domain filtering：Flame abnormal signal is extracted with bandpass filter.Conventional bandpass filter has Bart
Butterworth bandpass filter, ideal bandpass filter etc..Flame abnormal signal is usually to change in a narrower frequency band.Therefore
Extraction for flame abnormal signal needs a wave filter with narrower-band.And ideal bandpass filter can meet this
Advantageous features, therefore the preferred ideal bandpass filter of the application extracts to flame abnormal signal.
4）Small signals amplification：The flame abnormal signal of extraction is amplified processing.Due to some abnormal signals of flame
It is small, it is therefore desirable to be amplified the flame abnormal signal that time-domain filtering link is elected.By the abnormal weak signal of flame
It is multiplied by a multiplication factor so that the change of abnormal flame is enhanced, and then is easy to visualization.
5）Video Composition：The flame abnormal signal of amplification and the flare up fire of former collection input are overlapped, fire is completed
The restructuring of flame video, visualizes flame abnormal signal.
The present invention operation principle be：One width digital picture can be defined as a two-dimensional function f (x, y), wherein x and y
For space coordinate.Then video sequence can consider set of the two-dimensional function f (x, y) in time series, i.e. f (x, y, t).Image
It is that form storage is obtained with gray value in each coordinate points, if image is in identical position ash before and after in the image of acquisition
Angle value is with specific rule（Stable flame frequency）Change, then illustrate do not have abnormal signal generation in flame, on the contrary then explanation fire
Unstable change occurs for flame, that is, generates abnormal signal.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (4)
1. a kind of flame abnormal signal extracting method based on Euler's video enhancement techniques, comprises the following steps：
1）Signal acquisition：Gather flame video sequence signal；
2）Pyramid decomposition：Flame video sequence is decomposed with pyramid decomposition to obtain the video sequence of different frequency bands；
3）Time-domain filtering：Flame abnormal signal is extracted with bandpass filter；
4）Small signals amplification：The flame abnormal signal of extraction is amplified processing；
5）Video Composition：The flame abnormal signal of amplification and the flare up fire of former collection input are overlapped, flame is completed and regards
The restructuring of frequency, visualizes flame abnormal signal.
2. the flame abnormal signal extracting method according to claim 1 based on Euler's video enhancement techniques, its feature exists
In：Described pyramid is gaussian pyramid.
3. the flame abnormal signal extracting method according to claim 1 based on Euler's video enhancement techniques, its feature exists
In：The bandpass filter is ideal bandpass filter.
4. the flame abnormal signal extracting method according to claim 1 based on Euler's video enhancement techniques, its feature exists
In：It is 120 frames and the high speed camera collection flame video sequence signal of the above with sample frequency.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109520690A (en) * | 2018-10-30 | 2019-03-26 | 西安交通大学 | A kind of rotary machine rotor Mode Shape global measuring device and method based on video |
| CN110263796A (en) * | 2019-06-21 | 2019-09-20 | 贵州大学 | Method, system and device based on flame color identification combustion equivalent ratio |
| CN110263722A (en) * | 2019-06-21 | 2019-09-20 | 贵州大学 | The method, system and device of combustion state are judged based on flame color |
| CN110276129A (en) * | 2019-06-21 | 2019-09-24 | 贵州大学 | Method, system and device based on combustion control system control combustion furnace supply fuel equivalence ratio |
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| CN109520690A (en) * | 2018-10-30 | 2019-03-26 | 西安交通大学 | A kind of rotary machine rotor Mode Shape global measuring device and method based on video |
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| CN110276129A (en) * | 2019-06-21 | 2019-09-24 | 贵州大学 | Method, system and device based on combustion control system control combustion furnace supply fuel equivalence ratio |
| CN110276129B (en) * | 2019-06-21 | 2022-11-29 | 贵州大学 | Method, system and device for controlling equivalence ratio of fuel supplied to combustion furnace based on combustion control system |
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