CN108169160A - Single air high-risk chemical source of leaks detection method based on Terahertz - Google Patents
Single air high-risk chemical source of leaks detection method based on Terahertz Download PDFInfo
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- CN108169160A CN108169160A CN201711332668.6A CN201711332668A CN108169160A CN 108169160 A CN108169160 A CN 108169160A CN 201711332668 A CN201711332668 A CN 201711332668A CN 108169160 A CN108169160 A CN 108169160A
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- 230000008859 change Effects 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 2
- 239000002341 toxic gas Substances 0.000 abstract description 34
- 238000003384 imaging method Methods 0.000 abstract description 4
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- 238000005070 sampling Methods 0.000 description 8
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- 238000012544 monitoring process Methods 0.000 description 2
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- 238000001228 spectrum Methods 0.000 description 2
- 238000001328 terahertz time-domain spectroscopy Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 241001269238 Data Species 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
- G01N21/3586—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation by Terahertz time domain spectroscopy [THz-TDS]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N2021/3595—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using FTIR
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Abstract
The present invention relates to a kind of single air high-risk chemical source of leaks detection method based on Terahertz, the method is：Compile the air high-risk chemical concentration information measured and corresponding space coordinate；Concentration is subjected to numerical fitting relative to space coordinate in arithmetic system, obtains the spatially distributed functions of concentration；Spatially distributed functions are sent to imaging system；In imaging systems with different colours, different curve, the spatial distribution map of concentration is represented.By the invention it is possible to which realizing is needing to make the complicated air high-risk chemical environment judged rapidly, can more elements such as poison gas composition, poison gas concentration, poison gas trend be subjected to solid and showed；It realizes the originally discrete concentration data progress continuous treatment for measuring and obtaining, obtains the distribution map closer to live truth, crowd evacuation measure and malicious source suppressing method can quickly and effectively be made at toxic gas leakage scene by realizing.
Description
Technical field
The invention belongs to Environmental security fields, are related to a kind of detection method of air high-risk chemical spatial distribution, especially
It is to be related to a kind of single air high-risk chemical source of leaks detection method based on Terahertz.
Background technology
Usually, at explosion or attack of terrorism scene, often there is the indefinite toxicity air of one or several kinds of ingredients
High-risk chemical.But due to the complexity of site environment, people are often difficult to determine the source of the ingredient of poison gas, poison gas,
And the propagation path of poison gas, therefore crowd evacuation measure and malicious source suppressing method can not be quickly and effectively made, to people
The security of the lives and property of the people causes great loss, and the tracking and inhibiting for poison gas source eliminate work bring it is many
It is difficult.
Traditional air high-risk chemical detecting system is only limitted to air high-risk chemical type and its concentration into rower
It is fixed, measure, composite measurement and straight can not be carried out to the distribution situation of the air high-risk chemical leakage information in leak area
Sight shows, it is difficult to commanding be helped to formulate the Restrain measurement of air high-risk chemical source of leaks and crowd evacuation scheme rapidly.
Invention content
Based on this, it is necessary in traditional technology, it is impossible to the air high-risk chemical leakage information in leak area
Distribution situation composite measurement and intuitively show, it is difficult to it is rapid formulate air high-risk chemical source of leaks Restrain measurement with
The problem of formulating crowd evacuation scheme provides a kind of based on terahertz detection air high-risk chemical location mode.
The air high-risk chemical concentration distribution information of current location is obtained by detection device；
According to the air high-risk chemical concentration distribution information acquisition target acquisition position, and drive detection device row
Proceed to the target acquisition position；
The air high-risk chemical concentration distribution information of the target acquisition position is obtained again, is visited according to the target
The air high-risk chemical concentration distribution information that location is put obtains next target acquisition position, until next target acquisition
A concentration of peak value of air high-risk chemical of position is reached at air high-risk chemical source of leaks；
According to the air high-risk chemical concentration distribution information of the current location, the air of the target acquisition position
High-risk chemical concentration distribution information obtains air high-risk chemical spatial distribution image information.
It is described in one of the embodiments, to be visited according to the air high-risk chemical concentration distribution information acquisition target
Location is put, and detection device is driven to march to the target acquisition position, including：
All concentration distribution information acquired in the three dimensions of current location are ranked up, are obtained in three dimensions
The direction of concentration peak, the direction of travel as the detection device；
The detection device is driven to march to the target acquisition position to the direction of travel.
It is described to all concentration distribution information acquired in the three dimensions of current location in one of the embodiments,
Be ranked up, including by Bubble Sort Algorithm to all concentration distribution information acquired in the three dimensions of current location into
Row sequence.
It is described in one of the embodiments, to be visited according to the air high-risk chemical concentration distribution information acquisition target
Location is put, and detection device is driven to march to the target acquisition position and is further included：
To the concentration information averaged in the different height of current location, the highest height of mean concentration is obtained as mesh
Absolute altitude degree；
The concentration of different angle in the highest height of the mean concentration is ranked up, obtains the mean concentration
The highest angle of concentration is the target angle of the driving device in highest height；
The detection device is driven to march to the target acquisition position according to the object height and target angle.
The air high-risk chemical concentration distribution according to the target acquisition position in one of the embodiments,
Information obtains next target acquisition position, until a concentration of peak value of air high-risk chemical of next target acquisition position,
It reaches and includes at air high-risk chemical source of leaks：
The air for comparing continuous two target acquisition positions after the current location and the current location is high-risk
The peak value of chemical concentration；
If the peak value of the air high-risk chemical concentration of continuous two target acquisition positions is small after the current location
In the peak value of the air high-risk chemical concentration of the current location, then judge the current location for air high-riskization
Product source of leaks.
In one of the embodiments, the air high-risk chemical concentration distribution information according to the current location,
The air high-risk chemical concentration distribution information of the target acquisition position, obtains air high-risk chemical spatial distribution image
Information includes：
The air of the air high-risk chemical concentration distribution information of the current location, the target acquisition position is high
Chemical concentration distributed intelligence of endangering carries out numerical fitting, obtains air high-risk chemical concentration continuously distributed in three-dimensional coordinate
Information；
Continuously distributed air high-risk chemical concentration information is carried out according to air high-risk chemical concentration values difference
Mark, obtains air high-risk chemical spatial distribution image.
In one of the embodiments, the air high-risk chemical concentration distribution information according to the current location,
The air high-risk chemical concentration distribution information of the target acquisition position, obtains air high-risk chemical spatial distribution image
It further includes later：
Different types of air high-risk chemical is detected respectively by multiple detection devices, is obtained a variety of
The spatial distribution image of variety classes air high-risk chemical；
Different types of air high-risk chemical distributed image is overlapped processing, obtains variety classes air
High-risk chemical spatial distribution superimposed image, and the variety classes air high-risk chemical spatial distribution superimposed image is defeated
Go out.
It is described high-risk to different types of air respectively by multiple detection devices in one of the embodiments,
Chemicals is detected, and it is right respectively that the step of obtaining the spatial distribution image of a variety of variety classes air high-risk chemicals includes
The spatial distribution image of a variety of variety classes air high-risk chemicals carries out colour code.
It is described high-risk to different types of air respectively by multiple detection devices in one of the embodiments,
Chemicals is detected, and is further included after the step of obtaining the spatial distribution image of a variety of variety classes air high-risk chemicals：
Color in the spatial distribution image of the variety classes air high-risk chemical judges concentration variation letter
Breath；
Escape and evacuation direction is obtained according to the concentration change information；
Prompting is evaded according to escape and evacuation direction output.
A kind of computer readable storage medium, is stored thereon with computer program, which can when being executed by processor
The step of realizing any of the above embodiment.
Description of the drawings
Fig. 1 is the reflexive feedback system of Terahertz of air high-risk chemical detection that one embodiment provides；
Fig. 2 is the structure chart of the telescope support that one embodiment provides and cantilever；
Fig. 3 is the transmission-type terahertz time-domain system that one embodiment provides；
Fig. 4 is the method flow diagram of terahertz detection air high-risk chemical concentration distribution that one embodiment provides；
Fig. 5 is the method flow diagram of terahertz detection list high-risk chemical source of leakage that one embodiment provides；
Fig. 6 is the method flow diagram that the judgement detection device that one embodiment provides reaches source of leaks；
Fig. 7 is multiple high-risk chemical source of leaks detection method flow charts that one embodiment provides；
Fig. 8 is provided for one embodiment when detection tri- kinds of air high-risk chemicals of a, b, c, sets specific rotating shaft
The method flow diagram of the wicking height of rotation angle and telescope support；
Fig. 9 is a certain air high-risk chemical concentration result of detection distribution map that one embodiment provides；
Figure 10 is that a variety of air high-risk chemical concentration result of detection that one embodiment provides are distributed stacking chart.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right with reference to the accompanying drawings and embodiments
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, a kind of reflexive feedback system of Terahertz of air high-risk chemical detection is provided in one embodiment
1000, described device includes：
Detection device 100, the detection device 100 are used for atmospheric sounding high-risk chemical information.
Specifically, detection device 100 is for being sampled to air high-risk chemical, and obtain the high-risk chemistry of air
The device of product Terahertz feature, air high-risk chemical information specifically includes air high-risk chemical concentration information and air is high
Danger chemical race category information.
Mechanic adjustment unit 110, the mechanic adjustment unit 110 is connect with the detection device 100, for adjusting
The height and orientation of detection device 100 are stated, to obtain the air high-risk chemical information of different height and orientation.
Mechanic adjustment unit 110 carries out the position of detection device 100 pair by mechanical structure according to the instruction of processor
It should adjust, height and orientation including adjusting detection device 100, be sat so as to change the three-dimensional of 100 stop places of detection device
It marks (x, y, z), including abscissa x, ordinate y and vertical coordinate z.Specifically, mechanic adjustment unit adjusts detection device 100
Three-dimensional coordinate, to obtain in three dimensions the air high-risk chemical concentration distribution under different three-dimensional coordinates, obtain (n, a,
B, c), including air high-risk chemical concentration n, abscissa a, ordinate b and vertical coordinate c.When detection device 100
In (x1,y1,z1) detect air high-risk chemical concentration distribution coordinate (n1,a1,b1,c1) when, then there is x1=a1,y1=b1,z1
=c1。
Moving bearing device 120, the moving bearing device 120 carries the mechanic adjustment unit 110, and drives institute
It states detection device 100 to move in space, to obtain the air high-risk chemical information of different location.
Wherein moving bearing device 120 can be mechanically connected with mechanic adjustment unit 110, and mechanic adjustment unit 110 can be set
In on moving bearing device 120, moved with the movement of moving bearing device 120.It is similar, mechanic adjustment unit 110 with
Detection device 100 is mechanically connected, and is moved with the movement of moving bearing device 120.Moving bearing device 120 passes through shifting
Dynamic mechanic adjustment unit 110 is carried out movement detector 100 and is moved in space, and moving bearing device 120 is for detection device
100 movement can be to move horizontally；Meanwhile mechanic adjustment unit 110 can adjust the height and orientation of detection device 100 simultaneously.
Processor 130, the processor 130 are used to handle the high-risk chemistry of air that the detection device 100 is detected
Product information, and according to the handling result of air high-risk chemical information feedback, that the mechanic adjustment unit is controlled to adjust is high
Degree, orientation and moving bearing device movement, and the air high-risk chemical information is handled.
Processor 130 be information receive center, Information Analysis Center, feedback information generation center, information dispatching centre with
And control centre, be realize air high-risk chemical detection system detection accuracy device.
The moving bearing device includes babinet 121 in one of the embodiments,；The mechanic adjustment unit installation
On the moving bearing device, the processor 130 is located in the babinet 121.Specifically, mechanic adjustment unit can lead to
It crosses shaft 113 to connect with moving bearing device, shaft can carry out 360 ° of rotations, so as to which mechanic adjustment unit be driven to carry out
360 ° of rotations.For example, shaft can carry out 360 ° of rotations in the horizontal direction, so that detection device 100 can be located
In different orientation, i.e., different (x, y) coordinates.Processor is placed in babinet 121 in one of the embodiments, to processing
Device has protective effect.Specifically, the move mode of mobile bearing mode is unlimited, and moving bearing device 120 may include universal wheel
126, pulley and other can realize moving bearing device movement device or method all may be used.
The processor 130 may include data processing module and control module, the number in one of the embodiments,
The operation carried out according to processing module includes sentencing for sort operation, the source of leakage for carrying out the air high-risk chemical information
Disconnected operation, data fitting operation, image superposition operation, coordinate coincidence judge operation, and the control module is used for according to the number
Instruction is sent out, and drive institute to the air high-risk chemical spatial distribution detection device 100 according to the operation result of processing module
Air high-risk chemical spatial distribution detection device 100 is stated to be moved.
In one embodiment, the reflexive feedback system detection device 100 of Terahertz of air high-risk chemical detection is terahertz
Hereby time domain system, including air high-risk chemical sampling room 1021.
In addition, Terahertz air high-risk chemical detection system 1000 further includes feedback and instruction transmission electric wire 122, use
In the result of detection of reception detection device 100, and result of detection is transmitted to processor 130, and processor 130 is exported
Control instruction passes to moving bearing device and mechanic adjustment unit, and to control, moving bearing device is mobile, adjusts mechanical adjustment
Device, such as height of telescoping shoring column 113 etc..
Meanwhile Terahertz air high-risk chemical detection system 1000 may also include power plant 124, the power dress
124 are put to may be disposed in moving bearing device 120；The power plant 124 can be accumulator, be Terahertz air high-riskization
Product detection system provides power.
The detection device 100 may include terahertz time-domain system, and further, detection device 100 may include transmission-type too
Hertz time domain system, detects object for passing through THz wave.
Also referring to Fig. 2, the mechanic adjustment unit 110 includes telescope support 114 in one of the embodiments,
With cantilever 112, telescope support 114 has card slot 1141, and card slot 1141 is used to cantilever 112 being fixed on telescope support 114；
Spring 1142 is provided in card slot 1141, spring 1142 controls the vertical height of cantilever to change by self-deformation, and then controls
Detection device height change.The telescope support is connect with the moving bearing device；It is stretched with described described 112 one end of cantilever
Contracting stent connects, and the other end is connect with the detection device 100.
Optionally, the connection mode of telescope support and cantilever is not limited to spring card slot connection, other can realize flexible branch
Frame control cantilever carries out the connection mode of height change.
Also referring to Fig. 3, a kind of terahertz time-domain system of air high-risk chemical, the time domain system are provided
Including：Laser generator 301, for generating pumping pulse and direct impulse；Delay line 307, for receiving laser generator
The 301 pumping pulse laser generated, and adjust the pumping pulse of the generation of laser generator 301 and the time delay of direct impulse.
Signal generator 302, for emitting terahertz signal；Terahertz detection device 303, for air high-riskization in environment
Product sampling detection；Signal receiver 304, for finishing receiving air high-risk chemical in high-risk chemical sampling room 1021
The terahertz signal of information detection；Signal processor 305 for being analyzed and processed to the terahertz signal received, obtains
Air high-risk chemical information.
In one embodiment, the laser generator 301 includes femtosecond laser 3011 and beam splitter 3012；The letter
Number generator 302 includes lens, for generating terahertz signal；The terahertz detection device 303 is high-risk to carry air
Sample chemicals 3031, the first off axis paraboloidal mirror 3032, the second off axis paraboloidal mirror 3033, third off axis paraboloidal mirror
3034th, the 4th off axis paraboloidal mirror 3035.Wherein, 3032 and second off axis paraboloidal mirror of the first off axis paraboloidal mirror
3033 are oppositely arranged, and the third off axis paraboloidal mirror 3034 is oppositely arranged with the 4th off axis paraboloidal mirror 3035.The signal
Receiver 304 includes lens, for receiving terahertz signal；The signal processor 305 includes lock-in amplifier 3051 and letter
Number processing unit 3052；
The femtosecond laser 3011 that femto-second laser (not shown) is sent out in one of the embodiments, is by beam splitter 3012
It is divided into two pulses, respectively pumping pulse and direct impulse.Wherein pumping pulse reaches delayer 307, by delayer
After 307, it is incident in lock-in amplifier 3051；The terahertz pulse that wherein direct impulse and signal generator 302 generate according to
It is secondary to be incident on air high-risk chemical sample 3031 through third off axis paraboloidal mirror 3034, the first off axis paraboloidal mirror 3032,
Air high-risk chemical sample 3031 is detected, obtains result of detection signal, then through the second off axis paraboloidal mirror 3033,
4th off axis paraboloidal mirror, 3035 arriving signal receiver 304.Delayer 307 is adjusted between pumping pulse and direct impulse
Time delay, so as to change the time that detection light reaches terahertz detector.Utilize different detection light arrival times, terahertz
Hereby the electric field strength amount of changing with time can be measured.Signal processing apparatus 3052 to Terahertz electric field strength at any time
Variable quantity is analyzed and is handled, such as carries out Fourier transformation, obtains transmission spectrum, and gained transmission spectrum is analyzed
Obtain the type and concentration information of air high-risk chemical；
Air high-risk chemical sample 3031 is placed in air high-risk chemical sampling room in one of the embodiments,
In 1021 (not marked in figure), the air high-risk chemical sampling room 1021 in the terahertz time-domain system is in communication with the outside,
The terahertz time-domain system is used for the air high-risk chemical sample 3031 to the air high-risk chemical sampling room 1021
It is detected, obtains the air high-risk chemical information.In traditional technology, by air high-risk chemical be placed in gas chamber into
Row test, but during being detected by gas chamber, certain loss of THz wave, while the material of gas chamber can be caused
Certain property delayed of spectrum can be also caused, so as to make result of detection inaccurate.
In toxic gas leakage scene or explosion scene, gas chamber sampling is often not easy to, and needs to obtain in real time, really
Live air high-risk chemical type and concentration levels, then detector is then needed to be placed directly in atmospheric environment and is carried out
The measurement of contact.
Air humidity tester is also installed on the terahertz time-domain system probe in one of the embodiments,.Due to
Vapor is very strong for the absorption of Terahertz, therefore can select to eliminate vapor to result of detection using " making poor method "
Influence, gained Terahertz collection of illustrative plates will be detected and subtract the Terahertz collection of illustrative plates of the vapor of existing similary concentration in database, from
And the Terahertz profile information of corresponding air high-risk chemical to be measured is obtained, and then judge high-risk air high-risk chemical
Type and concentration information.
Testing time 20ps is chosen in one of the embodiments, and the Terahertz of 1-2THz wave bands surveys air
Examination, obtains collection of illustrative plates；By Terahertz pop one's head on subsidiary air humidity tester atmospheric humidity is tested, obtain air
Relative humidity is 5%；For relative air humidity when being respectively 20ps in 5%, sampling time, water is in 1~3THz in called data library
The absorption peak collection of illustrative plates of wave band；The collection of illustrative plates of measurement is subtracted into database collection of illustrative plates, you can obtain characteristic peak collection of illustrative plates；To characteristic peak collection of illustrative plates
In frequency and the peak height of fingerprint peaks carry out database and compare and calculate, you can obtain the high-risk substance of air under real time environment
Type and concentration.
Also referring to Fig. 4, a kind of high-risk chemical source of leaks detection method based on Terahertz, the method includes：
S402 obtains the air high-risk chemical concentration distribution information of current location by detection device；
S404 according to the air high-risk chemical concentration distribution information acquisition target acquisition position, and drives detection to fill
It puts and marches to the target acquisition position；
S406 obtains the air high-risk chemical concentration distribution information of the target acquisition position again；According to the mesh
The air high-risk chemical concentration distribution information of mark detecting location obtains next target acquisition position；Obtain multigroup detection position
The air high-risk chemical concentration distribution information put；
The air high-risk chemical concentration distribution information of multigroup detecting location is sent at processing system by S408
Reason；Export air high-risk chemical spatial distribution image information.
The detection device is terahertz time-domain system and device in one of the embodiments,.
Specifically, THz wave is electromagnetic wave of the frequency in the range of 0.l~10THz (wavelength is 3mm~30 μm).Too
With many special materials fully effect, therefore in terms of environmental monitoring, Terahertz is suitable for solid, liquid can occur for hertz
The research of the electricity, acoustic properties of the media such as body, air high-risk chemical and fluid, it can also be used to pollutant monitoring, biology and
The quality control of detection and the food industry of chemical substance.
THz wave has broadband property, and the frequency band of single terahertz-wave pulse can cover the terahertz from several hertz to tens
Hereby, detection device can by fourier transform infrared spectroscopy, microwave spectrum, far-infrared laser, non-linear frequency mixing technology,
Far red light grating spectrum and the equally method of energy atmospheric sounding high-risk chemical information, detect detected object.Specifically
, the light source of terahertz time-domain spectroscopy is terahertz pulse of the pulsewidth in picosecond level, and temporal resolution can reach skin
Second；Terahertz time-domain spectroscopy measurement measures for the electric field to terahertz pulse, belongs to coherent measurement, not only includes shaking
The information of width, while the information comprising phase can directly obtain the refractive index of sample；In addition, for some macromolecular air
High-risk chemical, the absorption peak obtained using the spectral line that THz wave obtains is more sharp, and line style overlapping is less so that big
The discrimination of gas high-risk chemical is more prone to.Particularly, many air high-risk chemicals have uniqueness in THz wave spectral coverage
Absorption line, ingredient, concentration of air high-risk chemical etc. can be measured using terahertz time-domain spectroscopic technology；
Meanwhile terahertz light spectral technology can be used for measuring the absorption of heterogeneity in hybrid atmospheric high-risk chemical, and measure mixed
The chemical composition of air high-risk chemical and the concentration of each component are closed, there is higher accuracy.
Specifically, THz wave has good compared to other detection means in many dielectric materials and nonpolar liquid
Good penetrability, therefore THz wave can carry out perspective imaging to opaque object.Further, since the typical case of Terahertz
Wavelength is much larger than the scale of the soot dust granule in air, these soot dust granules to suspend to the scattering of THz wave much smaller than pair
The scattering of other electromagnetic waves, therefore detection means can be made in more complicated site environment.
Specifically, THz wave has fingerprint spectrality, has absorption peak and the reflection of different frequency to different substances
Peak can efficiently and accurately demarcate the type of air high-risk chemical substance according to the existing finger print information of database；It simultaneously can
The concentration of air high-risk chemical is judged with the feature according to vibration amplitude.Optionally, judged according to the feature of vibration amplitude
The method of air high-risk chemical concentration include the size according to characteristic peak, the peak according to characteristic peak amplitude it
Than be equal to the ratio between air high-risk chemical concentration or and other can reflect that vibration amplitude and air high-risk chemical concentration are closed
The method of system.
Specifically, terahertz emission belongs to the scope of submillimeter wave, and photon energy and characteristic temperature are very low.One frequency
The energy for the photon that rate is 1THz is 4.1MeV, corresponding to 33 wave beams, characteristic temperature 48K, less than various chemical bonds
Bond energy, and the required photon energy of ionized biological tissue will usually reach 16eV, therefore far from making biological tissue or cell
Ionization, therefore harmful ionization reaction will not be caused, suitable for the occasion that explosive is diffused He the crowd is dense.
The terahertz time-domain system is transmission-type terahertz time-domain system in one of the embodiments,.Optionally too
Hertz time domain system is not limited to transmission-type, can also select reflective, differential type, ellipse inclined formula and can atmospheric sounding it is high
Other time domain systems of danger chemicals and high-risk substance probe.
The acquisition methods of target acquisition position include described in step S404 in one of the embodiments,：
All concentration distribution information acquired in three-dimensional coordinate are ranked up, obtain concentration highest in three-dimensional coordinate
The direction of point is the direction of travel of the detection device；
The driving detection device marches to the target acquisition position along the direction of travel.
Specifically, the target acquisition position refers to, detection device determines next according to the result of detection of current location
Walk the position that will be detected.Three-dimensional coordinate includes abscissa x, ordinate y and vertical coordinate z.It is described to institute in three-dimensional coordinate
All concentration distribution information obtained are ranked up, and are that all concentration acquired in three-dimensional coordinate are carried out from big to small
Sequence, obtains the coordinate of the point of concentration maximum, i.e. the coordinate (x ', y ', z ') of target acquisition position.
It is described to all concentration distribution information acquired in the three dimensions of current location in one of the embodiments,
Be ranked up, including by Bubble Sort Algorithm to all concentration distribution information acquired in the three dimensions of current location into
Row sequence.
Specifically, it is described according to the air high-risk chemical concentration distribution information acquisition target acquisition position, and drive
Detection device marches to the target acquisition position, including：
S4041 is ranked up all concentration distribution information acquired in the three dimensions of current location, obtains three-dimensional
The direction of peak concentration in space, the direction of travel as the detection device；
S4042 drives the detection device to march to the target acquisition position to the direction of travel.
It is described to all concentration distribution information acquired in the three dimensions of current location in one of the embodiments,
Be ranked up, including by Bubble Sort Algorithm to all concentration distribution information acquired in the three dimensions of current location into
Row sequence.Optionally, the method being ranked up to all concentration distribution information acquired in the three dimensions of current location is unlimited
In bubble sort, simple selection sequence, Straight Insertion Sort, Shell sorting, heapsort, merger sequence, quicksort are further included
And other can realize the algorithm of sequence.
It is described in one of the embodiments, to be visited according to the air high-risk chemical concentration distribution information acquisition target
Location is put, and detection device is driven to march to the target acquisition position and may also include：
S4041 ' to the air high-risk chemical concentration information averaged in the different height of current location, is put down
The highest height of equal concentration is the object height z that detection device is advanced；
S4042 ' is ranked up the concentration of the different angle in the highest height of the mean concentration, obtains described flat
The highest angle of concentration is the target angle of the driving device in the highest height of equal concentration；
S4043 ' drives the detection device to march to the target acquisition according to the object height and target angle
Position.Specifically, the target angle is is reference with former direction of advance using detection device as origin in a horizontal plane
(i.e. using the vectorial angle of former direction of advance as 0 °), origin be directed toward the vector of target acquisition position and former direction of advance institute into
Angle.
It, can be by multigroup a certain air high-risk chemical distribution in one of the embodiments, in step S408
Concentration information be sent to data processing system and handled.
In one of the embodiments, according to the air high-risk chemical concentration point of the current location in step S408
Cloth information, the air high-risk chemical concentration distribution information of the target acquisition position, output air high-risk chemical space point
The step of cloth image information air high-risk chemical, includes：
S4081 sends multigroup a certain air high-risk chemical relative to the concentration information that three-dimensional coordinate is distributed
Numerical fitting is carried out to numerical fitting system, it is continuously distributed relative to three-dimensional coordinate to obtain a certain air high-risk chemical
Concentration information；
The concentration information continuously distributed relative to three-dimensional coordinate is identified, obtains a certain air by S4082
High-risk chemical spatial distribution map.
In one of the embodiments, in step S4122, by the concentration continuously distributed relative to three-dimensional coordinate
Information carries out colour code, such as high concentration region is identified with light colour, and low concentration region is represented with dark colour, alternatively, with
Blue represents a kind of air high-risk chemical, and another air high-risk chemical is represented with red.
Optionally, the concentration information continuously distributed relative to three-dimensional coordinate is not limited to carry out colour code, also
Can carry out words identification, picture identification and other can reflect the identification method of air high-risk chemical concentration information.
In one of the embodiments, the air high-risk chemical concentration distribution information according to the current location,
The air high-risk chemical concentration distribution information of the target acquisition position, obtains air high-risk chemical spatial distribution image
It further includes later：
S4083 respectively detects different types of air high-risk chemical by multiple detection devices, obtains
To the spatial distribution image of a variety of variety classes air high-risk chemicals；
Different types of air high-risk chemical distributed image is overlapped processing, obtained not of the same race by S4084
Class air high-risk chemical spatial distribution superimposed image, and the variety classes air high-risk chemical spatial distribution is superimposed
Image exports.
A kind of computer readable storage medium is also provided in one of the embodiments, is stored thereon with computer journey
Sequence, wherein, when which is executed by processor, it can be achieved that in any of the above-described embodiment the step of method.
Please refer to fig. 5, a kind of single high-risk chemical source of leaks detection method based on Terahertz, the method
Including：
S502 obtains the air high-risk chemical concentration distribution information of current location by detection device；
S504 according to the air high-risk chemical concentration distribution information acquisition target acquisition position, and drives detection to fill
It puts and marches to the target acquisition position；
S506 obtains the air high-risk chemical concentration distribution information of the target acquisition position, according to the mesh again
The air high-risk chemical concentration distribution information of mark detecting location obtains next target acquisition position, until next target
A concentration of peak value of air high-risk chemical of detecting location reaches S508 at air high-risk chemical source of leaks, is worked as according to described
Air high-risk chemical concentration distribution information, the concentration distribution information of the target acquisition position of front position, obtain air height
Danger chemicals spatial distribution image information.
It is wherein step S502, step S504, step S508 and S402, S404, S408, essentially identical, it is no longer superfluous herein
It states.
Particularly, S506 in one of the embodiments, when the air high-risk chemical of next target acquisition position is dense
When spending for peak value, reach at air high-risk chemical source of leaks.
The air high-risk chemical source of leaks is the position in a region, can set the phase of the detection of detection device
The distance of adjacent two detecting locations is a step-length.
In one embodiment, when the air high-risk chemical peak concentration point judgment method using the S4041,
During the method for S4042, air high-risk chemical source of leaks is using detection gained air high-risk chemical peak concentration point as origin
Using a step-length as the sphere of radius.
In one embodiment, described in being used when the judgment method of the air high-risk chemical peak concentration point
S4041 ', S4042 ' method when, air high-risk chemical source of leaks is that the gas concentration peak point in corresponding height is origin
Using a step-length as the border circular areas of radius.Optionally, air high-risk chemical leakage source region selection mode be not limited to
Upper two kinds, in varied situations, it can flexibly use multiple choices mode.
Please with reference to Fig. 6, a kind of single air high-risk chemical source of leaks detection method based on Terahertz is described
Method includes：
S602 obtains the air high-risk chemical concentration distribution information and peak value of current location by detection device；
S604 according to the air high-risk chemical concentration distribution information acquisition target acquisition position, and drives detection to fill
It puts and marches to the target acquisition position；
S606 obtains the air high-risk chemical concentration distribution information and peak value of the target acquisition position again, according to
The air high-risk chemical concentration distribution information and peak value of the target acquisition position obtain next target acquisition position, and
Driving detection device marches to next target acquisition position again；
S608, if the magnitude relationship between the peak value of multiple target acquisition positions meets preset condition, according to more
The peak value of a target acquisition position obtains the location information of air high-risk chemical source of leaks；
S610, according to the air high-risk chemical concentration distribution information of the current location, the target acquisition position
Air high-risk chemical concentration distribution information obtains air high-risk chemical spatial distribution image information.
Wherein S602, S604, S606, S610, with S502, S504 in specification, S506, S510, essentially identical, herein
It repeats no more；
Particularly, if the magnitude relationship between the peak value of multiple target acquisition positions in one of the embodiments,
Meet preset condition, then the position of air high-risk chemical source of leaks is obtained according to the peak value of multiple target acquisition positions
Information specifically includes：
The air for comparing continuous two target acquisition positions after the current location and the current location is high-risk
The peak value of chemical concentration；
If the peak value of the air high-risk chemical concentration of continuous two target acquisition positions is small after the current location
In the peak value of the air high-risk chemical concentration of the current location, then judge the current location for air high-riskization
Product source of leaks.
If the magnitude relationship in one of the embodiments, between the peak value of multiple target acquisition positions meets pre-
If condition, then the location information for obtaining air high-risk chemical source of leaks according to the peak value of multiple target acquisition positions has
Body further includes：
If the peak value of the air high-risk chemical concentration of the first aim detecting location after the current location is less than
The peak value of the air high-risk chemical concentration of the current location, and the second target detection position after the current location
The air high-risk chemical peak concentration put is more than the air high-risk chemical peak concentration of the current location, then continues to compare
The peak value of the air high-risk chemical concentration of third target acquisition position after the current location and the present bit
Put the size of air high-risk chemical concentration；
If the peak value of the air high-risk chemical concentration of the third target acquisition position after the current location is less than
The peak value of the air high-risk chemical concentration of the current location, then the current location is that the air high-risk chemical is let out
Drain-source.
Also referring to Fig. 7, a kind of method of multiple high-risk chemicals leakage source detection based on Terahertz, the side
Method includes：
S702 obtains the concentration distribution information of the high-risk chemical of current detecting location by detection device；
S704 obtains target acquisition position according to the high-risk chemical concentration distribution information, and driving detection device is advanced
To the target acquisition position；
S706 obtains the concentration distribution information of the target acquisition position again,
Next target acquisition position is obtained according to the high-risk chemical concentration distribution information of the target acquisition position,
When the detection device obtains all source of leaks of a certain high-risk chemical in search coverage, multigroup detecting location is obtained
High-risk chemical concentration distribution information；
The Gas concentration distribution information of multigroup detecting location is sent to data processing system and handled by S708,
Obtain high-risk chemical spatial distribution image information.Wherein S702, S704, S708 and step S602, the S604 in specification,
S608 corresponding steps are essentially identical, and details are not described herein.
Particularly, in one of the embodiments, when air high-risk chemical space exploration imaging method detection obtains
When obtaining all source of leaks of a certain air high-risk chemical in search coverage, the coordinate where the detection device is described
Terminal point coordinate.
Judge that the detection device obtains the high-risk chemistry of a certain air in search coverage in one of the embodiments,
The method of all source of leaks of product includes：It is obtained according to the air high-risk chemical concentration distribution information of the target acquisition position
To next target acquisition position, until the coordinate of the coordinate of next target acquisition position and any detecting location before
It overlaps, then judges that the detection device obtains all source of leaks of a certain air high-risk chemical in search coverage.
In one of the embodiments, also referring to Fig. 8, it is described until the coordinate of next target acquisition position with
The coordinate of any detecting location before overlaps, then it is high to judge that the detection device obtains a certain air in search coverage
The method of all source of leaks of danger chemicals includes：
It obtains the coordinate of each target acquisition position and stores in the processing system；
Processing system carries out data analysis to the coordinate of each target acquisition position got；
Coordinate when next target acquisition position that processing system detects and the target acquisition position before any one
When the coordinate put overlaps；
Halt instruction is sent out to detection device；
The detection device stops detection.
Also referring to Fig. 8, additionally provide in one of the embodiments a kind of based on terahertz detection toxic gas
Method includes：
S802, detection device 100 demarcate gas componant, determine tri- kinds of toxic gases of a, b, c in marked gas；
S804 measures the concentration of toxic gas a；
S8061 adjusts mechanic adjustment unit, the runing rest of connection shaft is made to rotate 0 °, 90 °, 180 °, 270 ° respectively；
S8062 makes telescope support increase 1m, 10m, 20m, 30m height respectively；
S808 measures the concentration data under different coordinates；Concentration data is ranked up by S809, determines detecting devices row
Into direction and height；
If processor sends out halt instruction；All concentration datas are carried out numerical fitting by S812 relative to coordinate；S814,
Continuous concentration data is transmitted back to headquarter and is imaged.
If processor does not send out halt instruction, repeatedly step S802, S804, S8061, S8062, S808, S809.
The step of repeating S802, S804, S8061, S8062, S808, S809, S810, S812, S814 measures toxic gas
B and c, measure obtain toxic gas b, c concentration distribution information, then the concentration distribution matrix of toxic gas a, b, c is as follows：
By the respective concentration of toxic gas a, b, c according to sorting from big to small, such as a23>a13>a33> a43>…>a22>
a12>a32>A42, it is known that somewhere concentration axyMiddle x represents certain height, and y represents certain angle direction, so that it is determined that 2 → 3 direction of coordinate
The direction most fast for air high-risk chemical a increasing concen-trations, height 2 are the height of toxic gas a concentration maximums, and coordinate 4 is has
The height of poisonous gas a concentration minimums；By feeding back electric wire 122, instruction is sent out to universal wheel 126, makes universal wheel along increasing concen-trations
Most fast direction, i.e., opposite -135 ° of directions are advanced.All data are collected, by processor 130, by discrete concentration
Numerical fitting is carried out relative to coordinate, so as to obtain gas a, b, c relative to the continuous concentration distribution of three-dimensional coordinate；
Also referring to Fig. 9, Fig. 9 is the concentration result of detection distribution map of poison gas a, by that can be clearly seen than vitta,
Dark color represents low concentration air high-risk chemical, and light color represents high concentration air high-risk chemical, therefore light color aggregation position is
The higher position of poison gas a concentration is judged as the leakage source position of poison gas a, it is proposed that inhibits position for poison gas emphasis.Light color is to deeply
Color extending direction is judged as poison gas a descending concentrations direction, it is proposed that is crowd's escape route；Dark color is sentenced to light extending direction
The concentration sharp increase direction broken as poison gas a, it is proposed that evade route for crowd's emphasis.
Also referring to Figure 10, situation that Figure 10 a, b two kind poison gas are distributed in space, as seen from the figure, b points of poison gas
Cloth is in high-altitude, and for poison gas a in low latitude, situations such as this density and same day wind-force to gas in itself is related.According to different types of gas
The sprinkling of corresponding chemical treatment medicament can be effectively performed in the space distribution situation of body.Since low latitude poison gas is to people's
Life security influence is big compared with high-altitude poison gas, and judges that poison gas a concentration is big relative to poison gas b, therefore Ying You from shade
The first leakage of processing poison gas a.
It can be with the leakage situation of accurate judgement poison gas a and poison gas b, so as to help by intuitively showing for Fig. 9 and Figure 10
Poison gas Restrain measurement and crowd evacuation scheme are made in commanding.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the present invention's
Protection domain.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of single high-risk chemical source of leaks detection method based on Terahertz, which is characterized in that the method includes：
The air high-risk chemical concentration distribution information of current location is obtained by detection device；
According to the air high-risk chemical concentration distribution information acquisition target acquisition position, and detection device is driven to march to institute
State target acquisition position；
The air high-risk chemical concentration distribution information of the target acquisition position is obtained again, according to the target acquisition position
Air high-risk chemical concentration distribution information obtain next target acquisition position, until next target acquisition position it is big
A concentration of peak value of gas high-risk chemical is reached at air high-risk chemical source of leaks；
According to the air high-risk chemical concentration distribution information of the current location, air high-riskization of the target acquisition position
Product concentration distribution information obtains air high-risk chemical spatial distribution image information.
2. according to the method described in claim 1, it is characterized in that, described believe according to the air high-risk chemical concentration distribution
Breath obtains target acquisition position, and detection device is driven to march to the target acquisition position, including：
All concentration distribution information acquired in the three dimensions of current location are ranked up, obtain in three dimensions concentration most
The direction of high point, the direction of travel as the detection device；
The detection device is driven to march to the target acquisition position to the direction of travel.
3. according to the method described in claim 2, it is characterized in that, described own to acquired in the three dimensions of current location
Concentration distribution information is ranked up, including by Bubble Sort Algorithm to all concentration acquired in the three dimensions of current location
Distributed intelligence is ranked up.
4. according to the method described in claim 1, it is characterized in that, described believe according to the air high-risk chemical concentration distribution
Breath obtains target acquisition position, and detection device is driven to march to the target acquisition position and is further included：
To the concentration information averaged in the different height of current location, it is high for target to obtain the highest height of mean concentration
Degree；
The concentration of different angle in the highest height of the mean concentration is ranked up, it is highest to obtain the mean concentration
The highest angle of concentration is the target angle of the driving device in height；
The detection device is driven to march to the target acquisition position according to the object height and target angle.
5. according to the method described in claim 1, it is characterized in that, air high-riskization according to the target acquisition position
Product concentration distribution information obtains next target acquisition position, until the air high-risk chemical of next target acquisition position
A concentration of peak value is reached and is included at air high-risk chemical source of leaks：
Compare the high-risk chemistry of air of continuous two target acquisition positions after the current location and the current location
The peak value of product concentration；
If the peak value of the air high-risk chemical concentration of continuous two target acquisition positions is respectively less than institute after the current location
The peak value of the air high-risk chemical concentration of current location is stated, then judges that the current location is let out for the air high-risk chemical
Drain-source.
6. the according to the method described in claim 1, it is characterized in that, air high-risk chemical according to the current location
Concentration distribution information, the air high-risk chemical concentration distribution information of the target acquisition position, obtain air high-risk chemical
Spatial distribution image information includes：
By the air high-risk chemical concentration distribution information of the current location, the high-risk chemistry of air of the target acquisition position
Product concentration distribution information carries out numerical fitting, obtains air high-risk chemical concentration information continuously distributed in three-dimensional coordinate；
Continuously distributed air high-risk chemical concentration information is identified according to air high-risk chemical concentration values difference,
Obtain air high-risk chemical spatial distribution image.
7. the according to the method described in claim 6, it is characterized in that, air high-risk chemical according to the current location
Concentration distribution information, the air high-risk chemical concentration distribution information of the target acquisition position, obtain air high-risk chemical
It is further included after spatial distribution image：
Different types of air high-risk chemical is detected respectively by multiple detection devices, is obtained a variety of not of the same race
The air high-risk chemical spatial distribution image of class air high-risk chemical；
Different types of air high-risk chemical distributed image is overlapped processing, obtains variety classes air high-riskization
Product spatial distribution superimposed image, and the variety classes air high-risk chemical spatial distribution superimposed image is exported.
8. according to the method described in claim 6, it is characterized in that, it is described by multiple detection devices respectively to not of the same race
The air high-risk chemical of class is detected, the step of obtaining the spatial distribution image of a variety of variety classes air high-risk chemicals
Including carrying out colour code to the spatial distribution image of a variety of variety classes air high-risk chemicals respectively.
9. according to the method described in claim 8, it is characterized in that, it is described by multiple detection devices respectively to not of the same race
The air high-risk chemical of class is detected, the step of obtaining the spatial distribution image of a variety of variety classes air high-risk chemicals
It further includes later：
Color in the spatial distribution image of the variety classes air high-risk chemical judges concentration change information；
Escape and evacuation direction is obtained according to the concentration change information；
Prompting is evaded according to escape and evacuation direction output.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
The step of method described in any one can be realized in claim 1-9 during execution.
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| PCT/CN2018/092436 WO2019114239A1 (en) | 2017-12-13 | 2018-06-22 | Terahertz detection method and system for highly hazardous chemical in atmosphere |
| US16/446,620 US20190302012A1 (en) | 2017-12-13 | 2019-06-20 | Terahertz detection method and system for high-risk chemical in atmosphere |
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