CN109668836A - Remote sense monitoring system and remote-sensing monitoring method - Google Patents
Remote sense monitoring system and remote-sensing monitoring method Download PDFInfo
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- CN109668836A CN109668836A CN201910017065.XA CN201910017065A CN109668836A CN 109668836 A CN109668836 A CN 109668836A CN 201910017065 A CN201910017065 A CN 201910017065A CN 109668836 A CN109668836 A CN 109668836A
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- 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
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- 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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- 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
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
- G01N2021/396—Type of laser source
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Abstract
The invention discloses a kind of remote sense monitoring systems, it is adapted to detect for the concentration of the several under test gas in motor-vehicle tail-gas, comprising: laser emission element, including several lasers, several lasers are suitable for emitting the laser of different wave length, to detect under test gas corresponding with the wavelength；Emit optical coupling unit, the laser coupled suitable for emitting several described lasers forms a branch of transmitting light；And galvanometer scanning unit, the first reflected light is reflected to form suitable for carrying out in back and forth movement to the transmitting light, first reflected light forms linear scan region on road surface and covers all lanes, to detect the motor-vehicle tail-gas in all lanes.In addition, the invention also discloses a kind of remote-sensing monitoring methods.Remote sense monitoring system and method for the invention, the motor-vehicle tail-gas being able to achieve in steadily road pavement carries out Concentration Testing, and can delicately detect the concentration of a variety of pure gas, and detection data is accurate and reliable.
Description
Technical field
The present invention relates to the Concentration Detection field of motor-vehicle tail-gas more particularly to a kind of remote sense monitoring system and remote sensing
Monitoring method.
Background technique
As discharge beyond standards phenomenon of the environmental protection administration to motor-vehicle tail-gas is increasingly paid attention to, it usually needs the machine in road pavement
The tail gas of motor-car discharge carries out Concentration Testing, to judge motor vehicle by detecting the ratio that various composition occupies in tail gas
Whether exhaust emissions is exceeded, to implement to control and limit exhaust emissions, to forbid the measures such as road on exceeded vehicle.
Traditional detection method takes contact type measurement, by exhaust gas analyzer at the scene to the ingredient of vehicle exhaust into
Row analysis.Exhaust gas analyzer be using nondixpersive infrared and electrochemical sensor to Main Components CO in automobile exhaust,
HC, CO2, NOX carry out contact type measurement.This method is difficult difficult expansion in the inspection work of road, and detection efficiency is low, scene prison
Pipe is difficult, can also cause more serious pollution due to vehicle idling travels in detection process.In addition, above-mentioned conventional method is to pass through
The running environment of analog machine motor-car obtains exhaust emissions amount, and working environment is limited and vehicle cannot be reflected completely in operating status
Under actual discharge situation.Moreover, the above method is measured to the exhaust gas component for not draining into atmosphere in exhaust pipe, and it is real
Pollution is generated to atmospheric environment is that the knot after complex chemical reaction occurs in air for the tail gas being discharged from motor vehicle exhaust
Fruit, therefore, obtained detection data not can truly reflect motor-vehicle tail-gas pollution caused by atmospheric environment.
In the prior art, in order to which the concentration more efficiently to motor-vehicle tail-gas carries out real-time online detection, using motor vehicle
Remote exhaust emission inspection technique.This method be under the premise of not influencing normal traffic, using the distance sensing principle in optics,
The concentration for CO, CO2, HC and NOX in tail gas that detection vehicle discharges respectively during motor-driven vehicle going, and it is logical to record motor vehicle
The velocity and acceleration and meteorological condition when sensor are crossed, while grabbing the license plate number of motor vehicle.In addition, motor-vehicle tail-gas
Remote sense monitoring system is based on remote sensing inspection technique, and real-time online detects the tail gas concentration of vehicular emission, while establishing data quantization
Model is handled, the interference that the factors such as vehicle running state, weather environment monitor motor-vehicle tail-gas is excluded, realizes that vehicle discharges number
According to real-time, accuracy monitoring, motor vehicle emission data are uploaded in real time by mobile communication and Internet technology
Get up to Environmental Protection Agency's monitor supervision platform, and with tail gas annual test data organic linking, to realize data resource sharing, and to motor vehicle
Emission data exercises supervision and data integrated management.
But above-mentioned motor-vehicle tail-gas remote sensing inspection technique mostly uses infrared and ultra-violet absorption spectrum technology, is generally used for infrared
Bandwidth with the light emitting diode of ultra-violet absorption spectrum measurement is 20~100nm, and gas absorption spectrum line width is only several nanometers,
Gas absorbs several one thousandths for only accounting for light source intensity, also smaller than the variation of light source intensity, causes the sensitivity of measurement very low.
Since the spectral composition of light source intensity itself can vary over, for CO and CO2 gas, the absorption of characteristic spectral line
Rate is very low, and line-width is very narrow, and the absorption line of gas with various repeats serious in the near infrared region, leads to infrared and UV absorption
The detection method of spectrum is difficult to realize.As it can be seen that by background gas, ambient temperature and humidity difference, unstability of the intensity of light source etc. because
Element influences, and motor-vehicle tail-gas remote sensing inspection technique has certain limitation, and sensitivity is low.In addition, in rectilinear remote sensing monitoring
Single-point type optical path is mostly used in system, so that the data of detection cannot reflect the real conditions, very of automotive emission
To there is the case where missing inspection, cause to measure numerical value inaccuracy or without data.In addition, the mirror surface in rectilinear remote sense monitoring system
Reflection unit is fixedly mounted among road, can not only destroy road surface, and it is larger also to will cause live road shock, causes to receive
End reception light intensity signal is unstable, influences measurement result.
Summary of the invention
For this purpose, existing above the present invention provides a kind of remote sense monitoring system to solve the problems, such as or at least alleviate.
According to an aspect of the invention, there is provided a kind of remote sense monitoring system, if being adapted to detect in motor-vehicle tail-gas
The concentration of dry kind of under test gas, comprising: laser emission element, including several lasers, several lasers are suitable for transmitting not
The laser of co-wavelength, to detect under test gas corresponding with the wavelength；Emit optical coupling unit, being suitable for will be described several
The laser coupled of a laser transmitting forms a branch of transmitting light；And galvanometer scanning unit, it is suitable in back and forth movement to described
Transmitting light carries out reflecting to form the first reflected light, and first reflected light forms linear scan region on road surface and covers all vehicles
Road, to detect the motor-vehicle tail-gas in all lanes.
Optionally, in remote sense monitoring system according to the present invention, further includes: reflector element is arranged in and described linearly sweeps
Region is retouched, the reflector element is suitable for carrying out retroreflecting to first reflected light, to form the second reflected light；And it connects
Unit is received, is suitable for receiving second reflected light, and analytical calculation is carried out to second reflected light, it is described to be calculated
The concentration of under test gas in tail gas.
Optionally, in remote sense monitoring system according to the present invention, the laser emission element include: several first swash
Light device, the first laser device are suitable for space light output；And several second lasers, the second laser are suitable for optical fiber
Output.
Optionally, in remote sense monitoring system according to the present invention, the transmitting optical coupling unit includes: collimator；If
Dry combiner mirror, the combiner mirror is suitable for coupling the spatial light of the corresponding first laser device, so as to described
The space optical coupling of several first laser devices is a branch of spatial light；And fiber coupler, be suitable for will it is described several second
The fiber coupling of laser is an optical fiber, and the optical fiber after the coupling is after the collimator, again through the combiner
Mirror forms the transmitting light with the space optical coupling after described couple.
Optionally, in remote sense monitoring system according to the present invention, several described first laser devices include NOx laser
With HC laser, the NOx laser is adapted to detect for NOx, and the HC laser is adapted to detect for HC；Several described second lasers
Device includes CO laser and CO2 laser, and the CO laser is adapted to detect for CO, and the CO2 laser is adapted to detect for CO2.
Optionally, in remote sense monitoring system according to the present invention, several described combiner mirrors are parallel and interval is arranged,
And the combiner mirror and the angle of horizontal direction are 45 °.
Optionally, in remote sense monitoring system according to the present invention, the galvanometer scanning unit includes galvanometer；The transmitting
Light is incident on the galvanometer, and forms first reflected light through the vibration mirror reflected.
Optionally, in remote sense monitoring system according to the present invention, the incident angle of the transmitting relatively described galvanometer of light
It is 45 °.
Optionally, in remote sense monitoring system according to the present invention, the reflector element includes reflector, the reflector
For prism structure, to carry out retroreflecting to first reflected light.
Optionally, in remote sense monitoring system according to the present invention, the receiving unit includes: detector；And wide-angle
Lens form optical signal suitable for carrying out shaping to second reflected light and focusing on the detector, to believe the light
Number analytical calculation is carried out, second reflected light is shaped as a shaped laser spot by line spot.
Optionally, in remote sense monitoring system according to the present invention, the surface of the reflector is formed with height by silver-plated
Reflectance coating.
Optionally, in remote sense monitoring system according to the present invention, the laser is diode laser.
According to a further aspect of the invention, a kind of remote-sensing monitoring method is additionally provided, for detecting in motor-vehicle tail-gas
Several under test gas concentration, comprising steps of emitting the laser of several different wave length, to detect and the wavelength phase
Corresponding under test gas；The several laser coupled is formed into a branch of transmitting light；And reflection is carried out to the transmitting light
At the first reflected light, first reflected light forms linear scan region on road surface and covers all lanes, all to detect
The motor-vehicle tail-gas in lane.
Optionally, in remote-sensing monitoring method according to the present invention, further includes: return to first reflected light anti-
It penetrates, to form the second reflected light；Second reflected light is received, and analytical calculation is carried out to second reflected light, so as to
The concentration of the under test gas in the tail gas is calculated.
Optionally, in remote-sensing monitoring method according to the present invention, the several laser include several spatial light and
Several optical fiber.
Optionally, in remote-sensing monitoring method according to the present invention, the several laser coupled is formed into a branch of transmitting
Light includes: to reflect respectively the several spatial light, so that the several space optical coupling is a branch of spatial light；With
It and by the several fiber coupling is an optical fiber, and by optical fiber and the space optical coupling after described couple after the coupling
Form the transmitting light.
Optionally, in remote-sensing monitoring method according to the present invention, the several spatial light includes: to be adapted to detect for NOx
Spatial light and be adapted to detect for the spatial light of HC；The several optical fiber includes: to be adapted to detect for the optical fiber of CO and be suitable for examining
Survey the optical fiber of CO2.
Optionally, in remote-sensing monitoring method according to the present invention, receiving second reflected light includes: to described second
Reflected light carry out shaping and focus form optical signal, so as to the optical signal carry out analytical calculation, second reflected light by
Line spot is shaped as a shaped laser spot.
According to the technique and scheme of the present invention, a kind of remote sense monitoring system and remote-sensing monitoring method are provided, setting pair is passed through
A variety of lasers of multiple gases in tail gas (including NOx, HC, CO, CO2 etc.) are answered, every kind of laser is suitable for transmitting different wave length
Laser, and detect corresponding with its wavelength pure gas, and will not by other composition influences in tail gas, so as to
The more acurrate respective concentration for delicately detecting every kind of under test gas in tail gas.Wherein, the emitted optocoupler of the laser of multi-wavelength
It closes unit to couple to form a branch of transmitting light, and forms linear scan region on road surface after vibration mirror reflected, all lanes can be covered,
To be able to achieve the detection for carrying out tail gas concentration to the motor vehicle in all lanes, detection data is more reliable.Further, pass through road
The reflector element arranged on face carries out retroreflecting to the light beam after vibration mirror reflected, and returns to receiving unit, then single by receiving
Member is analyzed and processed optical signal, is able to achieve the detection to tail gas concentration.Reflector element of the invention can't destroy road surface,
And the susceptibility for situations such as optical path rolls road shock, dust, ponding and vehicle can be reduced, so as to avoid detection
Device does not receive the case where reflection signal, and the motor-vehicle tail-gas being able to achieve in steadily road pavement is detected.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
To the accomplishment of the foregoing and related purposes, certain illustrative sides are described herein in conjunction with following description and drawings
Face, these aspects indicate the various modes that can practice principles disclosed herein, and all aspects and its equivalent aspect
It is intended to fall in the range of theme claimed.Read following detailed description in conjunction with the accompanying drawings, the disclosure it is above-mentioned
And other purposes, feature and advantage will be apparent.Throughout the disclosure, identical appended drawing reference generally refers to identical
Component or element.
Fig. 1 show according to an embodiment of the present invention in laser coupled and reflect after road surface formed linear scan region
Schematic illustration；
Fig. 2 shows the cross-sectional views on the road surface that reflector element is disposed with according to an embodiment of the present invention；
Fig. 3 shows the overlooking structure diagram that the road surface of reflector element is disposed with according to an embodiment of the present invention；
Fig. 4 shows the schematic diagram of remote-sensing monitoring method according to an embodiment of the invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
As it was noted above, in the prior art for detecting the remote sense monitoring system of motor-vehicle tail-gas, in use or
Mostly or less there is certain functional defect, therefore the invention proposes a kind of more optimized remote sense monitoring system 100 of performance, is suitable for
Detect the concentration of the several under test gas in motor-vehicle tail-gas.It should be pointed out that there are a variety of gas in the tail gas of vehicular emission
Body including NOx, HC, CO and CO2 etc., but is not limited to these gases.Since the ingredient of variety classes gas is different, by setting
A variety of lasers of corresponding multiple gases are set, every kind of laser is suitable for emitting the laser of different wave length, and detects and its wavelength phase
Corresponding pure gas can more accurately detect respective concentration of the every kind of under test gas in tail gas.Fig. 1 to Fig. 3 is shown
The structural schematic diagram of remote sense monitoring system 100 of the invention.
As shown in Figure 1 to Figure 3, remote sense monitoring system 100 of the invention includes laser emission element 110, transmitting optical coupling
Unit 120, galvanometer scanning unit 130, reflector element 140 and receiving unit.
Wherein, laser emission element 110 includes several lasers, several lasers are suitable for emitting swashing for different wave length
Light, so as to detect under test gas corresponding with the wavelength of laser.Here, several lasers are tunable semiconductor two
Pole pipe laser, moreover, service band selected by the laser of each laser transmitting of the present invention (is for detecting corresponding gas
The wave band of body), hardly by the other gases and moisture absorption in tail gas detected, to make remote sensing monitoring of the invention
System 100 can qualitatively and quantitatively be detected pure gas to the tail gas with various other components, without by other ingredients
Influence.Here, other ingredients are the gas and moisture in tail gas other than gas to be detected.
The laser coupled that the present invention is emitted several lasers by emitting optical coupling unit 120, makes several Shu Jiguang
A branch of transmitting light is formed by coupling.
According to one embodiment, laser emission element 110 includes several first laser devices 111 and several second lasers
Device 112, wherein first laser device 111 is suitable for space light output, and second laser 112 is suitable for optical fiber output.
As shown in Figure 1, transmitting optical coupling unit 120 includes corresponding several with several first laser devices 111 respectively
A combiner mirror 121 further includes a fiber coupler 122 and a collimator 113.Combiner mirror 121 is suitable for corresponding
The spatial light of first laser device 111 is coupled, and the spatial light of several first laser devices 111 is through corresponding combiner mirror 121
After reflection, coupling forms a branch of spatial light of horizontal direction.Fiber coupler 122 is suitable for several second lasers 112
Optical fiber is coupled, and is coupled and to be formed an optical fiber, and an optical fiber after coupling is after collimator 113, again by photosynthetic
Beam mirror 121 couples, to further couple with the spatial light after coupling and form a branch of transmitting light.
Specifically, several first laser devices 111 include NOx laser and HC laser, it should be understood that NOx laser
Spatial light be adapted to detect for NOx, the spatial light of HC laser is adapted to detect for HC.Several second lasers 112 include CO laser
Device and CO2 laser, the optical fiber of CO laser are adapted to detect for CO, and the optical fiber of CO2 laser is adapted to detect for CO2.That is, this
Invention is to detect vehicular emission correspondingly respectively by NOx laser, HC laser, CO laser and CO2 laser
Tail gas in NOx, HC, CO and CO2 concentration, and then by analyze and determine tail gas in different types of gas content be
It is no exceeded.It should be noted that since the wavelength of the laser of the laser transmitting of corresponding variety classes gas is different, and wavelength with
Its detect pure gas it is corresponding, so as to it is more acurrate, delicately detect respective concentration of the every kind of under test gas in tail gas,
It will not be influenced by ingredients other in tail gas.
In addition, several combiner mirrors 121 are parallel and interval is arranged, and combiner mirror 121 and the angle of horizontal direction are
45°.In this way, NOx laser and the laser (spatial light) of HC laser transmitting project corresponding combiner mirror along the vertical direction
On 121, and it is coupled as through combiner mirror 121 a branch of spatial light of horizontal direction, so that the optical fiber after coupling passes through combiner mirror
121 can further couple a branch of transmitting light to form horizontal direction with spatial light.
In turn, the transmitting light of horizontal direction can project galvanometer scanning unit 130, specifically be incident upon galvanometer scanning unit
On 130 galvanometer, and the incident angle for emitting the relatively described galvanometer of light is 45 °.The reflective mirror of galvanometer can carry out transmitting light
The first reflected light is reflected to form, moreover, galvanometer can ceaselessly do the round-trip linear motion of high speed.Since galvanometer is in the round-trip fortune of high speed
Transmitting light can be reflected when dynamic, so that the first reflected light projects formed after vibration mirror reflected, behind road surface, meeting is on road surface
Form linear scan region 160.Linear scan region is in linear type, and covers all lanes along perpendicular to track direction, from
And it is able to achieve the detection that tail gas concentration is carried out to the motor vehicle in all lanes.Here, since galvanometer is the round-trip straight line for doing high speed
Movement, and light of first reflected light after vibration mirror reflected and horizontal direction have certain angle, are formed after vibration mirror reflected
The first reflected light perpendicular to road surface space formation be a fan-shaped planar scanning area, to be incident upon on road surface
Be an one-shaped linear light belt, that is, above-mentioned linear scan region 160.
Further, as shown in Figures 2 and 3, reflector element 140 is installed on road surface, and reflector element 140 and is located at road
Linear scan region on face, reflector element 140 can carry out retroreflecting to above-mentioned first reflected light, and form the second reflection
Light.According to a kind of embodiment, reflector element 140 includes reflector 141, and reflector 141 is mounted on the linear scan area on road surface
In domain 160.Reflector 141 uses microprismatic retroreflective structure, and microprismatic retroreflective structure has the characteristic of retroreflecting, can be by big portion
The first reflected light is divided inversely to return to receiving unit along the optical path for being incident on reflector 141, thus, pass through 141 energy of reflector
Retroreflecting is carried out to the first reflected light and forms the second reflected light.It is appreciated that the second reflected light is and the first reflected light light
Identical, the contrary light beam in road.The surface of micro-prism structure is also by silver-plated formation highly reflecting films on reflector 141, thus
The reflection efficiency of microprism on reflector 141 can be improved, moreover it is possible to increase the width of reflectance spectrum.
In addition, as shown in Fig. 2, reflector element 140 further includes the fixation kit of fixed reflector 141.Specifically, reflection is single
Member 140 includes reflective plate bracket 142 and reflector cover board 143, by the way that reflective plate bracket 142 is fixed on road surface, reflector 141
It is fixedly mounted on reflective plate bracket 142, and is laid with reflector cover board 143 above reflector 141, thus to reflector 141
It plays a certain protective role, prevents road vehicles from directly rolling reflector 141.In addition, reflector element 140 further includes sheath
144, sheath 144 is mounted on the periphery of reflective plate bracket 142, to play to reflective plate bracket 142 and reflector 141 certain
Protective action.According to above-mentioned setting, the present invention installs reflector 141 and does not need to destroy road surface, and readily replaceable and maintenance
Reflector 141.Road shock, dust, ponding and vehicle are rolled moreover, reflector 141 of the invention can reduce optical path
Situations such as susceptibility, avoid detector do not receive reflection signal the case where.
According to one embodiment, receiving unit is suitable for receiving above-mentioned second reflected light, and analyzes the second reflected light
It calculates, so as to the concentration for the various under test gas being calculated in tail gas.Specifically, receiving unit includes detector and wide-angle
Lens 155, the second reflected light are incident on wide-angle lens 155, and light beam is whole using lens combination after the focusing of wide-angle lens 155
Shape so that the second reflected light be made to be shaped as a shaped laser spot by line spot, and focuses on and forms optical signal on detector, passes through
Analytical calculation is carried out to optical signal, the concentration of the various under test gas in tail gas can be calculated.
According to langbobier law, when the directional light (being in the present invention the first reflected light) of specific wavelength is across to be measured
When gas, photon under test gas can by light absorption, in this way, passing through the intensity of the light after under test gas will decay, and
Under certain condition, the intensity of optical attenuation and the concentration direct proportionality of under test gas.It is adjustable by controlling according to above-mentioned principle
The laser of humorous semiconductor diode laser transmitting specific band, when specific band is centered on the wavelength that under test gas absorbs
When being changed in the region of wavelength, the photon of central wavelength is generated and is significantly declined due to that can be absorbed by corresponding under test gas
Subtract phenomenon.In this way, the photon of laser center wavelength by under test gas because being absorbed after the laser of specific band passes through under test gas
And the relaxation phenomenon generated can be received unit capture, thus, the attenuation change of central wavelength can be converted to pair by receiving unit
The concentration for the under test gas answered.
In remote sense monitoring system 100 of the invention, laser emission element 110 includes corresponding with CO, CO2, HC, NO respectively
Four kinds of wavelength tunable semiconductor diode laser, and 110 opposite of laser emission element (vertically on the ground) pacify
Equipped with reflector element 140.When vehicle passes through, 100 automatic trigger of remote sense monitoring system makes four of laser emission element 110
Laser emits the laser of different wave length respectively.The laser coupled of four kinds of wavelength is transmitting light, and passes through galvanometer scanning unit 130
The under test gas in tail gas is passed through after reflection, the light beam after decaying is reflected using the reflector element 140 on ground and is received
Unit captures.To, remote sense monitoring system 100 of the invention can be calculated in real time CO, CO2 of same position in tail gas, HC,
The concentration of NO.Also, remote sense monitoring system 100 is suitable for exporting after concentration is calculated concentration value by burning equation.
Fig. 4 shows remote-sensing monitoring method 400 according to an embodiment of the invention, and this method 400 is motor-driven for detecting
The concentration of several under test gas in tail gas.
Method 400 starts from step S410, in step S410, is sent out by several lasers of laser emission element 110
The laser of several different wave length is penetrated, so as to detect under test gas corresponding with the wavelength of laser.
In the step s 420, several laser coupled is formed by a branch of transmitting light by transmitting optical coupling unit 120.Due to
Laser emission element 110 includes several first laser devices 111 and several second lasers 112, and first laser device 111 is suitable for
Space light output, second laser 112 are suitable for optical fiber output.To which, several laser includes several spatial light and several
Optical fiber.
Specifically, as shown in Figure 1, the present invention is by several combiner mirrors 121 to corresponding first laser device 111
Spatial light is coupled, and the spatial light of several first laser devices 111 after the reflection of corresponding combiner mirror 121, couples respectively
Form a branch of spatial light of horizontal direction.In addition, by fiber coupler 122 to the optical fiber of several second lasers 112 into
Row coupling, and couple and to form an optical fiber, and an optical fiber after coupling is after collimator 113, again through combiner mirror 121
Coupling, to further couple with the spatial light after coupling and form a branch of transmitting light.
Further, due to several first laser devices 111 include NOx laser and HC laser, several second swash
Light device 112 includes CO laser and CO2 laser.To which several spatial light includes being adapted to detect for the spatial light of NOx and fitting
In the spatial light of detection HC；Several optical fiber includes the optical fiber for being adapted to detect for CO and the optical fiber for being adapted to detect for CO2.It should refer to
Out, the present invention is the several laser by different wave length, in the tail gas for detecting vehicular emission correspondingly respectively
The concentration of NOx, HC, CO and CO2, and then by analyzing and determining whether different types of gas content in tail gas exceeded.And
And the pure gas of the corresponding detection of wavelength of every kind of laser matches, so as to it is more acurrate, delicately detect every kind it is to be measured
Respective concentration of the gas in tail gas will not be influenced by ingredients other in tail gas.
In turn, step S430 is executed, is reflected by the transmitting light that the galvanometer of galvanometer scanning unit 130 forms coupling
The first reflected light is formed, since galvanometer can ceaselessly do the round-trip linear motion of high speed, thus formed after vibration mirror reflected first
Reflected light projects can form linear scan region 160 on road surface behind road surface, and linear scan region 160 is along perpendicular to lane
Direction covers all lanes, to be able to achieve the detection for carrying out tail gas concentration to the motor vehicle in all lanes.
In addition, after step S430, also progress step S440 passes through the reflector 141 in road surface up reflection unit 140
Retroreflecting is carried out to the first reflected light, to form the second reflected light.
Finally, executing step S450, the second reflected light is received by receiving unit, and analysis meter is carried out to the second reflected light
It calculates, thus the concentration for the various under test gas being calculated in motor-vehicle tail-gas.Specifically, receiving unit includes detector and wide
Minus lens 155 receive the second incident reflected light by wide-angle lens 155, and the second reflected light is after the focusing of wide-angle lens 155
Using lens combination shaping, so that the second reflected light be made to be shaped as a shaped laser spot by line spot, and detector is focused on
The concentration of the various under test gas in tail gas can be calculated by carrying out analytical calculation to optical signal in upper formation optical signal.
The described in any item remote sense monitoring systems of A7, such as A1-A6, wherein the galvanometer scanning unit includes galvanometer；It is described
Transmitting light is incident on the galvanometer, and forms first reflected light through the vibration mirror reflected.A8, the remote sensing prison as described in A7
Examining system, wherein the incident angle of the transmitting relatively described galvanometer of light is 45 °.A9, as described in A2 remote sense monitoring system,
Wherein, the reflector element includes reflector, and the reflector is prism structure, to return to first reflected light
Reflection.A10, the remote sense monitoring system as described in A2 or A9, wherein the receiving unit includes: detector；And wide-angle is saturating
Mirror forms optical signal suitable for carrying out shaping to second reflected light and focusing on the detector, so as to the optical signal
Analytical calculation is carried out, second reflected light is shaped as a shaped laser spot by line spot.A11, the remote sensing monitoring system as described in A9
System, wherein the surface of the reflector is formed with highly reflecting films by silver-plated.The described in any item remote sensing prisons of A12, such as A1-A11
Examining system, wherein the laser is diode laser.
B17, the remote-sensing monitoring method as described in B15 or B16, wherein the several spatial light includes being adapted to detect for NOx
Spatial light and be adapted to detect for the spatial light of HC；The several optical fiber includes being adapted to detect for the optical fiber of CO and being adapted to detect for
The optical fiber of CO2.B18, the remote-sensing monitoring method as described in B14, wherein receiving second reflected light includes: to described second
Reflected light carry out shaping and focus form optical signal, so as to the optical signal carry out analytical calculation, second reflected light by
Line spot is shaped as a shaped laser spot.
In the description of this specification unless specifically defined or limited otherwise, term " connection ", " fixation " etc. should all be done extensively
Reason and good sense solution.In addition, the orientation or positional relationship of the instructions such as term " on ", "lower", "inner", "outside", "top", "bottom" is based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion is signified
Equipment or unit must have specific direction, be constructed and operated in a specific orientation, it is thus impossible to be interpreted as to of the invention
Limitation.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or show
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, knot is not been shown in detail
Structure and technology, so as not to obscure the understanding of this specification.
Claims (10)
1. a kind of remote sense monitoring system is adapted to detect for the concentration of the several under test gas in motor-vehicle tail-gas, comprising:
Laser emission element, including several lasers, several lasers are suitable for emitting the laser of different wave length, to detect
Under test gas corresponding with the wavelength；
Emit optical coupling unit, the laser coupled suitable for emitting several described lasers forms a branch of transmitting light；And
Galvanometer scanning unit, suitable for reflect to form the first reflected light to the transmitting light in back and forth movement, described first
Reflected light forms linear scan region on road surface and covers all lanes, to detect the motor-vehicle tail-gas in all lanes.
2. remote sense monitoring system as described in claim 1, wherein further include:
Reflector element, is arranged in the linear scan region, and the reflector element is suitable for returning first reflected light
Reflection, to form the second reflected light；And
Receiving unit is suitable for receiving second reflected light, and carries out analytical calculation to second reflected light, to calculate
The concentration of under test gas in the tail gas out.
3. remote sense monitoring system as claimed in claim 1 or 2, wherein the laser emission element includes:
Several first laser devices, the first laser device are suitable for space light output；And
Several second lasers, the second laser are suitable for optical fiber output.
4. remote sense monitoring system as claimed in claim 3, wherein the transmitting optical coupling unit includes:
Collimator；
Several combiner mirrors, the combiner mirror are suitable for coupling the spatial light of the corresponding first laser device, with
The space optical coupling that toilet states several first laser devices is a branch of spatial light；And
Fiber coupler, suitable for being an optical fiber by the fiber coupling of several second lasers, the light after the coupling
Fibre forms the transmitting light with the space optical coupling after described couple after the collimator, again through the combiner mirror.
5. remote sense monitoring system as described in claim 3 or 4, in which:
Several described first laser devices include NOx laser and HC laser, and the NOx laser is adapted to detect for NOx, described
HC laser is adapted to detect for HC；
Several described second lasers include CO laser and CO2 laser, and the CO laser is adapted to detect for CO, described
CO2 laser is adapted to detect for CO2.
6. remote sense monitoring system as claimed in claim 4, in which:
Several described combiner mirrors are parallel and interval is arranged, and the combiner mirror and the angle of horizontal direction are 45 °.
7. a kind of remote-sensing monitoring method, for detecting the concentration of the several under test gas in motor-vehicle tail-gas, comprising steps of
Emit the laser of several different wave length, to detect under test gas corresponding with the wavelength；
The several laser coupled is formed into a branch of transmitting light；And
The transmitting light is carried out to reflect to form the first reflected light, first reflected light forms linear scan region simultaneously on road surface
All lanes are covered, to detect the motor-vehicle tail-gas in all lanes.
8. remote-sensing monitoring method as claimed in claim 7, wherein further include:
Retroreflecting is carried out to first reflected light, to form the second reflected light；
Second reflected light is received, and analytical calculation is carried out to second reflected light, to be calculated in the tail gas
Under test gas concentration.
9. remote-sensing monitoring method as claimed in claim 7 or 8, in which:
The several laser includes several spatial light and several optical fiber.
10. remote-sensing monitoring method as claimed in claim 9, wherein the several laser coupled is formed a branch of transmitting light
Include:
The several spatial light is reflected respectively, so that the several space optical coupling is a branch of spatial light；And
It is an optical fiber by the several fiber coupling, and by optical fiber and the space optocoupler after described couple after the coupling
Conjunction forms the transmitting light.
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