CN207610987U - Terahertz detection air high-risk chemical distribution apparatus - Google Patents
Terahertz detection air high-risk chemical distribution apparatus Download PDFInfo
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Abstract
The utility model is related to a kind of terahertz detection air high-risk chemical distribution apparatus, described device includes：Air high-risk chemical detection device, mechanic adjustment unit, data processing server and moving bearing device, the air high-risk chemical detection device are used for atmospheric sounding high-risk chemical type and concentration information；The mechanic adjustment unit is used to adjust the position of the air high-risk chemical detection device；The data processing server is used to handle the data information that the air high-risk chemical detection device is detected and controls the mechanic adjustment unit and the moving bearing device, and the moving bearing device is moved for controlling the terahertz detection air high-risk chemical distribution apparatus in space；Described mechanic adjustment unit one end is connect with the bogey, and the other end is connect with the air high-risk chemical detection device.The terahertz detection air high-risk chemical distribution apparatus is provided with power guidance to establish escape route with rescue direction.
Description
Technical field
The utility model is related to a kind of Environmental security fields, more particularly to a kind of terahertz detection air high-risk chemical
Distribution apparatus.
Background technology
With the rapid development of the increasingly serious and chemical industry of non-traditional threat, countries in the world face increasingly tight
High chemical poison attack of terrorism threat and high-risk chemical industrial spill accident threaten, such as Tokyo Schain poison gas
8.12 explosion accident of PORT OF TIANJIN of attack and China.In face of high-risk chemical explosion or attack of terrorism scene, live air
Spatial distribution and the dynamic process detection of high-risk chemical are often the key of emergency disposal, and are still so far international forward position
Hot spot and technical barrier.
Sampling air high-risk chemical is often placed in gas chamber and tests by traditional detection means, but gas chamber meeting
Certain loss of THz wave is caused, and gas chamber can also cause delaying for tera-hertz spectra, to influence the accuracy of result.
Utility model content
Based on this, it is necessary to certain loss of THz wave can be caused for above-mentioned traditional gas chamber, and gas chamber can also be made
At delaying for tera-hertz spectra, the accuracy to influence result provides a kind of device of terahertz detection.
A kind of terahertz detection air high-risk chemical distribution apparatus, described device include：
Laser generator, for generating pulse signal；
Signal generator, for emitting terahertz signal；
Air high-risk chemical sampling room, for being detected to the air sampling in environment；
Signal receiver samples room atmosphere high-risk chemical information detection for finishing receiving air high-risk chemical
Terahertz signal；
Signal processor obtains air high-risk chemical kind for carrying out analyzing processing to the terahertz signal received
Class and concentration information.
The laser generator includes femto-second laser and beam splitter in one of the embodiments,.
The femtosecond laser that femto-second laser is sent out in one of the embodiments, is divided into two pulses by beam splitter.Wherein
A branch of is direct impulse, and in addition a branch of is pumping pulse.
The signal generator is the terahertz transmitter being made of lens in one of the embodiments,.
THz wave takes through being launched into air high-risk chemical after off axis paraboloidal mirror in one of the embodiments,
In specimen chamber.
Air high-risk chemical sampling room includes gas atmo high-risk chemical sample in one of the embodiments,
Product, the first off axis paraboloidal mirror and the second off axis paraboloidal mirror.
Air high-risk chemical sampling room is measured with by side atmosphere formula in one of the embodiments,.
The signal receiver is the Terahertz receiver being made of lens in one of the embodiments,.
The signal processor includes lock-in amplifier and signal processing apparatus in one of the embodiments,.
Described device further comprises pulse generator and delayer in one of the embodiments,.
Description of the drawings
Fig. 1 is the reflexive feedback system of Terahertz for the air high-risk chemical detection that one embodiment provides；
Fig. 2 is the structure chart of telescope support and cantilever that one embodiment provides；
Fig. 3 is the transmission-type terahertz time-domain system that one embodiment provides；
Fig. 4 is the method flow diagram for the terahertz detection air high-risk chemical concentration distribution that one embodiment provides；
Fig. 5 is the method flow diagram for the single high-risk chemical source of leakage of terahertz detection 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 provides for one embodiment when detection tri- kinds of air high-risk chemicals of a, b, c, sets the rotation of specific rotating shaft
The method flow diagram of the wicking height of gyration 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 implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
The present invention will be further described in detail for example.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
Referring to Fig. 1, providing a kind of reflexive feedback system of Terahertz of air high-risk chemical detection 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 air high-risk chemical
The device of Terahertz feature, air high-risk chemical information specifically include air high-risk chemical concentration information and air high-riskization
Learn kind category information.
Mechanic adjustment unit 110, the mechanic adjustment unit 110 are connect with the detection device 100, described for adjusting
The height and orientation of detection device 100, to obtain the air high-risk chemical information of different height and orientation.
Mechanic adjustment unit 110 carries out pair the position of detection device 100 according to the instruction of processor by mechanical structure
It should adjust, including adjust the height and orientation of detection device 100, be sat 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 the air high-risk chemical concentration distribution in three dimensions 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 exists
(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 carry the mechanic adjustment unit 110, and described in drive
Detection device 100 moves 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 arranged
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 movement
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 is for handling 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, control the mechanic adjustment unit adjust it 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 generate center, information dispatching centre with
And control centre, it is the device for the detection accuracy for realizing air high-risk chemical detection system.
The moving bearing device includes babinet 121 in one of the embodiments,；The mechanic adjustment unit is mounted on
On the moving bearing device, the processor 130 is located in the babinet 121.Specifically, mechanic adjustment unit can be by turning
Axis 113 is connect with moving bearing device, and shaft can rotate 360 °, to drive mechanic adjustment unit to carry out 360 ° of rotations
Turn.For example, shaft can rotate 360 ° in the horizontal direction, so that detection device 100 is at difference
Orientation, i.e., different (x, y) coordinates.Processor is placed in babinet 121 in one of the embodiments, has guarantor to processor
Shield acts on.Specifically, the move mode of mobile bearing mode is unlimited, and moving bearing device 120 may include universal wheel 126, pulley
And other device or method that moving bearing device movement may be implemented all may be used.
The processor 130 may include data processing module and control module, the data in one of the embodiments,
The operation that processing module carries out includes that sort operation, the source of leakage for being carried out to the air high-risk chemical information judge fortune
Calculation, data fitting operation, image superposition operation, coordinate coincidence judge that operation, the control module are used at according to the data
The operation result of reason module sends out instruction to the air high-risk chemical spatial distribution detection device 100, and drives described big
Gas high-risk chemical spatial distribution detection device 100 is 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, it is used for
The result of detection of detection device 100 is received, and result of detection is transmitted to processor 130, and the control that processor 130 is exported
Instruction passes to moving bearing device and mechanic adjustment unit, to control moving bearing device movement, adjustment mechanic adjustment unit,
Such as the height etc. of telescoping shoring column 113.
Meanwhile Terahertz air high-risk chemical detection system 1000 may also include power plant 124, the power plant
124 may be disposed in moving bearing device 120；The power plant 124 can be accumulator, be Terahertz air high-risk chemical
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 114 He of telescope support in one of the embodiments,
There is card slot 1141, card slot 1141 to be used to cantilever 112 being fixed on telescope support 114 for cantilever 112, telescope support 114；Card slot
Spring 1142 is provided in 1141, the vertical height that spring 1142 controls cantilever by self-deformation changes, and then controls detection
Device height change.The telescope support is connect with the moving bearing device；112 one end of the cantilever and the telescope support
Connection, the other end are connect with the detection device 100.
Optionally, the connection type of telescope support and cantilever is not limited to spring card slot connection, other can realize flexible branch
Frame controls the connection type that cantilever carries out height change.
Also referring to Fig. 3, a kind of terahertz time-domain system of air high-risk chemical, the time domain system packet are provided
It includes：Laser generator 301, for generating pumping pulse and direct impulse；Delayer 307 is produced for receiving laser generator 301
Raw pumping pulse laser, and adjust the time delay of the pumping pulse and direct impulse of the generation of laser generator 301.Signal produces
Raw device 302, for emitting terahertz signal；Terahertz detection device 303, for being sampled to the air high-risk chemical in environment
Detection；Signal receiver 304, for finishing receiving air high-risk chemical information detection in high-risk chemical sampling room 1021
Terahertz signal；Signal processor 305 obtains air high-riskization for carrying out analyzing processing to the terahertz signal received
Product information.
In one embodiment, the laser generator 301 includes femtosecond laser 3011 and beam splitter 3012；The signal
Generator 302 includes lens, for generating terahertz signal；The terahertz detection device 303 is carrying air high-riskization
Product sample 3031, the first off axis paraboloidal mirror 3032, the second off axis paraboloidal mirror 3033, third off axis paraboloidal mirror 3034,
4th off axis paraboloidal mirror 3035.Wherein, first off axis paraboloidal mirror, 3032 and second off axis paraboloidal mirror 3033 is opposite
Setting, the third off axis paraboloidal mirror 3034 are oppositely arranged with the 4th off axis paraboloidal mirror 3035.The signal receiver 304
Including lens, for receiving terahertz signal；The signal processor 305 includes lock-in amplifier 3051 and signal processing apparatus
3052；
The femtosecond laser 3011 that femto-second laser (not shown) is sent out in one of the embodiments, is divided by beam splitter 3012
At two pulses, respectively pumping pulse and direct impulse.Wherein pumping pulse reach delayer 307, by delayer 307 it
Afterwards, it is incident in lock-in amplifier 3051；The terahertz pulse that wherein direct impulse and signal generator 302 generate is successively through the
Three off axis paraboloidal mirrors 3034, the first off axis paraboloidal mirror 3032 are incident on air high-risk chemical sample 3031, to air
High-risk chemical sample 3031 is detected, and obtains result of detection signal, then off-axis through the second off axis paraboloidal mirror the 3033, the 4th
3035 arriving signal receiver 304 of paraboloidal mirror.Delayer 307 adjusts the time delay between pumping pulse and direct impulse,
To change the time that detection light reaches terahertz detector.Utilize different detection light arrival times, Terahertz electric field strength
The amount of changing with time can be measured.Signal processing apparatus 3052 divides the Terahertz electric field strength amount of changing with time
Analysis and processing, such as Fourier transformation is carried out, transmission spectrum is obtained, gained transmission spectrum is analyzed to obtain air high-riskization
The type and concentration information of product；
Air high-risk chemical sample 3031 is placed in air high-risk chemical sampling room 1021 in one of the embodiments,
In (not marked in figure), the air high-risk chemical sampling room 1021 in the terahertz time-domain system is in communication with the outside, described
Terahertz time-domain system is used to carry out the air high-risk chemical sample 3031 of air high-risk chemical sampling room 1021
Detection, obtains the air high-risk chemical information.In traditional technology, air high-risk chemical is placed in gas chamber and is surveyed
Examination, but during being detected by gas chamber, certain loss of THz wave can be caused, while the material of gas chamber can also be made
At certain property delayed of spectrum, to keep result of detection inaccurate.
In toxic gas leakage scene or explosion scene, it is often not easy to gas chamber sampling, and needs to obtain in real time, really
Live air high-risk chemical type and concentration levels are contacted then detector is then needed to be placed directly in atmospheric environment
The measurement of formula.
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 "
It influences, detection gained Terahertz collection of illustrative plates is subtracted to the Terahertz collection of illustrative plates of the vapor of existing same concentration in database, to
The Terahertz profile information of corresponding air high-risk chemical to be measured is obtained, and then judges the kind of high-risk air high-risk chemical
Class and concentration information.
Testing time 20ps is chosen in one of the embodiments, the Terahertz of 1-2THz wave bands tests air,
Obtain collection of illustrative plates；By Terahertz pop one's head on subsidiary air humidity tester atmospheric humidity is tested, it is opposite to obtain air
Humidity is 5%；For relative air humidity when being respectively 20ps in 5%, sampling time, water is in 1~3THz wave bands in called data library
Absorption peak collection of illustrative plates；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 the finger in characteristic peak collection of illustrative plates
The frequency at line peak and peak height carry out database and compare and calculate, you can obtain high-risk substance classes of air under real time environment with it is dense
Degree.
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 sets 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 detecting location
Air high-risk chemical concentration distribution information；
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 0.l~10THz (wavelength is 3mm~30 μm) range.Terahertz
Hereby fully effect can occur with many special materials, therefore in terms of environmental monitoring, Terahertz be suitable for solid, liquid,
The research of the electricity, acoustic properties of the media such as air high-risk chemical and fluid, it can also be used to pollutant monitoring, biological and chemical
The quality control of detection and the food industry of substance.
There is THz wave broadband property, the frequency band of single terahertz-wave pulse can cover the terahertz from several hertz to tens
Hereby, detection device can be by fourier transform infrared spectroscopy, microwave spectrum, far-infrared laser, non-linear frequency mixing technology, remote
The method of echelette spectrum and equally energy atmospheric sounding high-risk chemical information, detects 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 picosecond；
Terahertz time-domain spectroscopy measurement is measured for the electric field to terahertz pulse, belongs to coherent measurement, includes not only amplitude
Information, while including the information of phase, the refractive index of sample can be directly obtained；In addition, high-risk for some macromolecular air
Chemicals, the absorption peak obtained using the spectral line that THz wave obtains is more sharp, and line style overlapping is less so that air is high-risk
The discrimination of chemicals is more prone to.Particularly, many air high-risk chemicals have unique absorption spectra in THz wave spectral coverage
Line can measure ingredient, the concentration etc. of air high-risk chemical using terahertz time-domain spectroscopic technology；Meanwhile terahertz
Hereby spectral technique can be used for measuring the absorption of heterogeneity in hybrid atmospheric high-risk chemical, and it is high-risk to measure hybrid atmospheric
The chemical composition of chemicals and the concentration of each component have 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 wave of Terahertz
The long scale much larger than the soot dust granule in air, these soot dust granules to suspend are much smaller than to other the scattering of THz wave
The scattering of electromagnetic wave, therefore detection means can be made in more complicated site environment.
Specifically, THz wave has fingerprint spectrality, has the absorption peak and reflection peak of different frequency to different substances,
The type of air high-risk chemical substance can be efficiently and accurately demarcated according to the existing finger print information of database；It simultaneously can root
The concentration of air high-risk chemical is judged according to the feature of vibration amplitude.Optionally, air is judged according to the feature of vibration amplitude
The method of high-risk chemical concentration includes that the ratio between the size according to characteristic peak, the amplitude of peak according to characteristic peak are equal to
The ratio between air high-risk chemical concentration or and other sides that can reflect vibration amplitude and air high-risk chemical concentration relationship
Method.
Specifically, terahertz emission belongs to the scope of submillimeter wave, and photon energy and characteristic temperature are very low.One frequency
Energy for the photon of 1THz is 4.1MeV, corresponds to 33 wave beams, and characteristic temperature 48K is less than the key of various chemical bonds
Can, and the required photon energy of ionized biological tissue will usually reach 16eV, therefore far from making biological tissue or cell electricity
From, 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-risk
Other time domain systems of chemicals and high-risk substance are popped one's head in.
The acquisition methods of target acquisition position described in step S404 include in one of the embodiments,：
All concentration distribution information acquired in three-dimensional coordinate are ranked up, concentration peak in three-dimensional coordinate is obtained
Direction be the detection device direction of travel；
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 in next step according to the result of detection of current location
The position that will be detected.Three-dimensional coordinate includes abscissa x, ordinate y and vertical coordinate z.It is described to being obtained in three-dimensional coordinate
All concentration distribution information taken are ranked up, and are rows from big to small to all concentration progress acquired in three-dimensional coordinate
Sequence, obtains the coordinate of the maximum point of concentration, i.e. the coordinate (x ', y ', z ') of target acquisition position.
In one of the embodiments, it is described to all concentration distribution information acquired in the three dimensions of current location into
Row sequence includes being arranged all concentration distribution information acquired in the three dimensions of current location by Bubble Sort Algorithm
Sequence.
Specifically, 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 space
The direction of interior peak concentration, 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.
In one of the embodiments, it is described to all concentration distribution information acquired in the three dimensions of current location into
Row sequence includes being arranged all concentration distribution information acquired in the three dimensions of current location by Bubble Sort Algorithm
Sequence.Optionally, the method being ranked up to all concentration distribution information acquired in the three dimensions of current location is not limited to emit
Bubble sequence, further include simple selection sequence, Straight Insertion Sort, Shell sorting, heapsort, merger sequence, quicksort and
Other can realize the algorithm of sequence.
It is described according to the air high-risk chemical concentration distribution information acquisition target acquisition in one of the embodiments,
Position, and drive detection device to march to the target acquisition position and may also include：
S4041 ' equals the air high-risk chemical concentration information averaged in the different height of current location
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 position according to the object height and target angle
It sets.Specifically, the target angle is in a horizontal plane, it is with reference to (i.e. with former direction of advance using detection device as origin
Using the vectorial angle of former direction of advance as 0 °), origin is directed toward the vector of target acquisition position and former direction of advance 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 distribution of the current location in step S408
Information, the air high-risk chemical concentration distribution information of the target acquisition position export air high-risk chemical spatial distribution
The step of image information air high-risk chemical includes：
S4081 sends the concentration information that multigroup a certain air high-risk chemical is distributed relative to three-dimensional coordinate
Numerical fitting is carried out to numerical fitting system, obtains dense continuously distributed relative to three-dimensional coordinate of a certain air high-risk chemical
Spend information；
The concentration information continuously distributed relative to three-dimensional coordinate is identified by S4082, and it is high to obtain a certain air
Danger chemicals spatial distribution map.
In one of the embodiments, in step S4122, the concentration continuously distributed relative to three-dimensional coordinate is believed
Breath carries out colour code, such as high concentration region is identified with light colour, and low concentration region is indicated with dark colour, alternatively, with indigo plant
Color table shows a kind of air high-risk chemical, and another air high-risk chemical is indicated 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, obtain air high-risk chemical spatial distribution image it
After further include：
S4083 respectively detects different types of air high-risk chemical by multiple detection devices, obtains
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, obtains variety classes by S4084
Air high-risk chemical spatial distribution superimposed image, and by the variety classes air high-risk chemical spatial distribution superimposed image
Output.
A kind of computer readable storage medium is also provided in one of the embodiments, is stored thereon with computer program,
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 packet
It includes：
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 sets 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 is visited
A concentration of peak value of air high-risk chemical that location is set reaches S508 at air high-risk chemical source of leaks, according to described current
Air high-risk chemical concentration distribution information, the concentration distribution information of the target acquisition position of position, it is high-risk to obtain air
Chemicals spatial distribution image information.
Wherein step S502, step S504, step S508 and S402, S404, S408, essentially identical, details are not described herein.
Particularly, S506 in one of the embodiments, when the air high-risk chemical of next target acquisition position is dense
When degree is 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 adjacent of the detection of detection device
The distance of two detecting locations is a step-length.
In one embodiment, when the air high-risk chemical peak concentration point judgment method using the S4041,
When 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, the side
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 sets 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 institute
The air high-risk chemical concentration distribution information and peak value for stating target acquisition position obtain next target acquisition position, and again
Driving detection device marches to next target acquisition position；
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 not
It repeats again；
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 that air high-risk chemical source of leaks is obtained according to the peak value of multiple target acquisition positions is believed
Breath 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 the high-risk chemistry of the air
Product source of leaks.
If the magnitude relationship in one of the embodiments, between the peak value of multiple target acquisition positions meets default
Condition, the then location information that air high-risk chemical source of leaks is obtained according to the peak value of multiple target acquisition positions are specifically gone back
Including：
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 detecting location after the current location
Air high-risk chemical peak concentration be more than the current location air high-risk chemical peak concentration, then continue to compare institute
Peak value and the current location for stating the air high-risk chemical concentration of the third target acquisition position after current location are big
The size of gas 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 air high-risk chemical leakage
Source.
Also referring to Fig. 7, a method of multiple high-risk chemicals based on Terahertz reveal source detection, the method
Including：
S702 obtains the concentration distribution information of the high-risk chemical of current detecting location by detection device；
S704 show that target acquisition position, driving detection device are advanced according to the high-risk chemical concentration distribution information
To the target acquisition position；
S706 obtains the concentration distribution information of the target acquisition position again,
Next target acquisition position, institute are obtained according to the high-risk chemical concentration distribution information of the target acquisition position
When stating all source of leaks of a certain high-risk chemical in detection device acquisition search coverage, the high-risk of multigroup detecting location is obtained
Chemical concentration distributed intelligence；
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 the end
Point coordinates.
Judge that the detection device obtains a certain air high-risk chemical in search coverage in one of the embodiments,
The methods of all source of leaks include：It is obtained down according to the air high-risk chemical concentration distribution information of the target acquisition position
One target acquisition position, until the coordinate of next target acquisition position is overlapped with the coordinate of any detecting location before,
Then judge 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 therewith
The coordinate of preceding any detecting location overlaps, then judges that the detection device obtains a certain air high-riskization in search coverage
The method of all source of leaks of product 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 set 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, measurement 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
For the most fast direction of air high-risk chemical a increasing concen-trations, height 2 is the maximum height of toxic gas a concentration, and coordinate 4 is to have
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, 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 indicates low concentration air high-risk chemical, and light color indicates 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 arrives dark color
Extending direction is judged as poison gas a descending concentrations direction, it is proposed that is crowd's escape route；Dark color is judged as to light extending direction
The concentration sharp increase direction of poison gas a, it is proposed that evade route for crowd's emphasis.
Also referring to Figure 10, the case where Figure 10 a, b two kind poison gas are distributed in space, as seen from the figure, poison gas b distributions
In high-altitude, for poison gas a in low latitude, situations such as this is to the density of gas itself and same day wind-force, is related.According to different types of gas
Space distribution situation the sprinkling of corresponding chemical treatment medicament can be effectively performed.Since low latitude poison gas is to the life of people
Security implication is big compared with high-altitude poison gas, and judges that poison gas a concentration is big relative to poison gas b, therefore answers priority processing from shade
The leakage of poison gas a.
It can be with the leakage situation of accurate judgement poison gas a and poison gas b, 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 keep 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.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of terahertz detection air high-risk chemical distribution apparatus, which is characterized in that described device includes：
Laser generator, for generating pulse signal；
Signal generator, for emitting terahertz signal；
Air high-risk chemical sampling room, for being detected to the air sampling in environment；
Signal receiver samples the terahertz of room atmosphere high-risk chemical information detection for finishing receiving air high-risk chemical
Hereby signal；
Signal processor, for carrying out analyzing processing to the terahertz signal that receives, obtain air high-risk chemical type and
Concentration information.
2. the apparatus according to claim 1, which is characterized in that the laser generator includes femtosecond laser and beam splitter.
3. the apparatus of claim 2, which is characterized in that the femtosecond laser that femto-second laser is sent out is divided by beam splitter
Two pulses；Wherein a branch of is direct impulse, and in addition a branch of is pumping pulse.
4. the apparatus according to claim 1, which is characterized in that the signal generator is to be sent out by the Terahertz that lens are constituted
Emitter.
5. device according to claim 4, which is characterized in that THz wave is launched into greatly after penetrating off axis paraboloidal mirror
In gas high-risk chemical sampling room.
6. the apparatus according to claim 1, which is characterized in that air high-risk chemical sampling room includes that air is high-risk
Sample chemicals, the first off axis paraboloidal mirror and the second off axis paraboloidal mirror.
7. device according to claim 6, which is characterized in that air high-risk chemical sampling room connects with tested air
Touch measures.
8. the apparatus according to claim 1, which is characterized in that the signal receiver is to be connect by the Terahertz that lens form
Receive device.
9. the apparatus according to claim 1, which is characterized in that the signal processor includes at lock-in amplifier and signal
Manage device.
10. the apparatus according to claim 1, which is characterized in that described device further comprises pulse generator and delay
Device.
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| CN109115690A (en) * | 2018-09-07 | 2019-01-01 | 中国人民解放军国防科技大学 | Real-time polarization sensitive terahertz time-domain ellipsometer and optical constant measuring method |
| CN109115690B (en) * | 2018-09-07 | 2024-04-26 | 中国人民解放军国防科技大学 | Terahertz time domain ellipsometer sensitive to real-time polarization and optical constant measurement method |
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