CN105300914A - Motor vehicle exhaust detection device - Google Patents
Motor vehicle exhaust detection device Download PDFInfo
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- CN105300914A CN105300914A CN201510897679.3A CN201510897679A CN105300914A CN 105300914 A CN105300914 A CN 105300914A CN 201510897679 A CN201510897679 A CN 201510897679A CN 105300914 A CN105300914 A CN 105300914A
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Abstract
The invention discloses a motor vehicle exhaust detection device which comprises a light source, a gas detector, a retro-reflection device and a portal frame, wherein the portal frame comprises two supporting rods erected on two sides of the road and a transverse rod which is connected with the two supporting rods and is positioned above the road; the light source and the gas detector are arranged on the transverse rod of the portal frame; a reflection device is arranged on the surface of the road below the portal frame; and monitoring beams emitted by the light source are reflected into the detector by virtue of the reflection device on the road surface. According to the device disclosed by the invention, the problem that the traditional motor vehicle exhaust remote sensing instrument cannot deal with multilane exhaust monitoring is solved.
Description
Technical field
The invention belongs to telemetering motor vehicle tail field, particularly a kind of Design of Vehicle Tail Gas Analyzer.
Background technology
Along with the increase of vehicle guaranteeding organic quantity, and the policy of a motor vehicle 6 years inspection is issued, and makes the motor vehicle adopting remote sensing technique to travel setting out on a journey carry out real-time detection and seems particularly necessary.And " air method " clear stipulaties newly promulgated for 2015 is not when affecting motor-driven vehicle going, can carry out real-time telemetry to motor vehicle.
Traditional telemetering motor vehicle tail instrument is all that level is installed and used, namely detect light beam and be parallel to road surface, when the tail gas cutting of vehicular emission detects light beam, the spectral composition change detecting light beam can be caused, thus the pollutant component obtained in motor vehicle discharged tail gas and concentration.But the telegauge that level is installed is only applicable to bicycle road, when being applied to multilane, more than two vehicle side by side by time cannot distinguish the emissions status of each car.The equipment installed and used due to level needs road occupying, can affect traffic, can not install an equipment on every bar track, and therefore existing telemetry equipment cannot tackle the tail gas monitoring of multilane.
Therefore, how to design a kind of when not taking road surface and not affecting traffic, the tail gas monitoring device that can adapt to multilane just becomes current problem demanding prompt solution.
Summary of the invention
The object of the invention is, for deficiency of the prior art, to provide a kind of Design of Vehicle Tail Gas Analyzer, to solve the problem that traditional telemetering motor vehicle tail instrument cannot tackle the monitoring of multilane tail gas.
Realizing technical scheme of the present invention is, a kind of Design of Vehicle Tail Gas Analyzer, it comprises: light source, gas detector, retroreflecting device and portal frame, wherein, described portal frame comprises two support bars that stand on road both sides and is connected described two support bars and is positioned at the cross bar above road, described light source and gas detector are installed on the cross bar of described portal frame, road surface below described portal frame is provided with reflection unit, and the retroreflecting device of the monitoring light beam that light source sends through road surface reflexes in described detector.
Further, described portal frame is also provided with speed detector, described speed detector comprises two range sensors along road direction, and two described range sensor intervals are arranged.
Preferably, described two range sensors lay respectively at the both sides, front and back of described gas detector.
In retroreflecting device described above, described retroreflecting device is the retroreflecting material being coated in described road surface.Or described retroreflecting device is the flat board that surface is coated with retroreflecting material, and described flat board is pasted onto road surface.
Preferably, described light source and gas detector are installed on crossbar center.
Preferably, described light source is silit infrared lamp.
A kind of Design of Vehicle Tail Gas Analyzer disclosed in this invention, the spectrum change of road xsect optional position can be collected, thus achieve each detection by the motor vehicle of check point, this measurement mechanism does not affect road traffic, it also avoid the interference problem of multilane.
Accompanying drawing explanation
Fig. 1 is the structural representation of Design of Vehicle Tail Gas Analyzer in the embodiment of the present invention.
Fig. 2 is the view of Design of Vehicle Tail Gas Analyzer before motor vehicle sails this measurement mechanism in the embodiment of the present invention;
Fig. 3 is the view of Design of Vehicle Tail Gas Analyzer when motor vehicle has just sailed the measured zone of this measurement mechanism in the embodiment of the present invention;
Fig. 4 is the view of Design of Vehicle Tail Gas Analyzer when motor vehicle leaves the measured zone of this measurement mechanism in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, but not as a limitation of the invention.
Shown in Figure 1, embodiments provide a kind of Design of Vehicle Tail Gas Analyzer, it comprises: light source 1, gas detector 2 and portal frame 3, wherein, described portal frame 3, comprise two support bars that stand on road both sides and be connected described two support bars and be positioned at the cross bar 31 above road, the height of described support bar should higher than the height of vehicle, described light source 1 and gas detector 2 are installed on the cross bar 31 of described portal frame 3, described gas detector 2 is built-in with gas concentration and gas componant detecting unit, determination and analysis can be carried out to spectral component, road surface below described portal frame 3 is provided with reflection unit 4, described reflex reflector is arranged on vehicle region to be measured, as direction of arrow instruction in figure, the monitoring light beam that light source 1 sends is from directive road surface above road, reflection unit 4 through road surface reflexes in the described detector 2 above road.Wherein, described light source 1 and detector 2 can be integrated in same parts, to the requirement of light source 1 and detector 2 are, it can monitor all xsects of certain section of road area in the mode of scanning.Specific molecule can only absorb the optical radiation of characteristic frequency, when measuring beam passes through the specific compound in light path, the radiant light only having those frequencies to conform to is absorbed, thus generation characteristic absorption band, obtain a light absorption spectrogram, just as " fingerprint ", can be used for determining unknown compound.Product of the present invention sends a branch of light source contained required for detection motor-vehicle tail-gas from top, received to detector 2 by ground return, detector 2 is respectively equipped with the bandpass filter corresponding to gas with various detection light source, by detecting without the light intensity of motor-vehicle tail-gas absorption and the light intensity after motor-vehicle tail-gas attenuation by absorption, corresponding gas concentration can be calculated.
There is certain width in each track, motor vehicle by time position be random, the gas outlet of motor vehicle may in the left back of motor vehicle or right back, therefore, motor vehicle by time gas outlet can in the optional position in track.In order to solve because motor vehicle exhaust may be in the problem of road diverse location, present invention employs the light source 1 covering track xsect and detector 2 structure that can scan road cross section.By the cooperating of the light source 1 in the present invention, reflection unit 4, detector 2, achieve the Tail gas measuring of whole piece track xsect.In addition, the equipment installed and used due to level needs road occupying, can affect traffic, can not install an equipment on every bar track.Telemetry equipment is installed on above each track by the present invention, does not take road surface, does not affect traffic, the creationary interference problem solving multilane.
Preferably, described light source 1 and gas detector 2 are installed on cross bar 31 central authorities, and such light source 1 swept area is large, and the efficiency that detector 2 receives is high.Described light source 1 preferably selects silit infrared lamp.
Traditional telemetering motor vehicle tail instrument sends detection light source 1 by main frame, by the corner reflector on arrival opposite, road surface, the light beam that main frame sends by corner reflector turns back to main frame, detect light beam and form a closed loop by corner reflector, because the reflection coefficient of corner reflector is very high, therefore the light signal reflected is very strong, is very favourable for spectral detection.
The present invention sends to detect light beam to ground above road, and not established angle reverberator on the whole piece track on ground, decrease equipment cost, also do not affect traffic, decrease the inconvenience that installation itself brings.If there is no reflection unit 4, only lean on ground to be very faint in the face of the reflection detecting light beam, the needs of detection can not be met.In order to improve the reflection strength detecting light beam, the reflex reflector in the present invention has two kinds can embodiment.Scheme one: adopt a kind of reflective infrared being coated on ground to detect the retroreflecting material of light beam, this retroreflecting material is directly coated on ground; Scheme two: surface retroreflecting material being coated on certain plate material, then the flat board being coated with retroreflecting material is pasted onto on road surface.The detection light beam 11 sent when light source 1 is mapped on retroreflecting material, effectively can reflex on detector 2 within the scope of certain angle, solves the problem detecting light intensity.
Further, described portal frame 3 is also provided with speed detector, described speed detector comprises two range sensors along road direction (also namely one in front and one in back), i.e. the first range sensor 41 and second distance sensor 42, two described range sensor intervals are arranged, and are namely provided with comparatively short spacing.Preferably, described two range sensors lay respectively at the both sides of described gas detector 2 and adjacent setting.Range sensor sends distance in real time earthward and detects light 43.
With reference to shown in Fig. 2 to Fig. 4, the present invention, to the mode of operation of the monitoring of speed from original No. two optoelectronic switches, changes into and have employed distance detection mode.When there not being vehicle to pass through, what range sensor detected is distance from sensor to road surface, when motor vehicle sails into, two range sensors successively detect the change of distance, record the time of range recovery when leaving apart from the time of change and the tailstock when headstock enters, distance due to two range sensors is known, by the calculating to time and distance, just obtain motor vehicle by time speed and accekeration.
When motor vehicle head and afterbody pass through, the time of passing through is calculated respectively by two range sensors, if motor vehicle head is t1 by the time that second (below one) sensor is used, the tailstock is t2 by the time that second sensor is used, and the distance between two sensors is D.So obtain:
Speed V=(V1+V2)/2
Acceleration a=(V1-V2)/V
In formula:
V1=D/t1 headstock by time speed;
The V2=D/t2 tailstock by time speed.
It should be noted that, in the embodiment of the present invention, two range sensors arranged by front and back can calculate vehicle by time speed, two range sensors are located at above the cross bar of portal frame, front and back arrange, vertically downward detect vehicle whether pass through.
The workflow of measurement mechanism of the present invention is as follows:
Equipment is started working, the background gas concentration in roadway environments monitored continuously by gas detector, when first range sensor tested the speed receives the signal that motor vehicle enters, stop detecting, according to the spectral signal analytical calculation current gas concentration concentration as a setting detected, recover when the tailstock leaves second range sensor to detect motor vehicle by after to cause the concentration of the gas of change due to tail gas, deduct motor vehicle with motor vehicle by the gas concentration detected later and enter the concentration that the background concentration before detection is exactly current automobile discharge.
Because gas detect light is covering path xsect, by the Scanning Detction of detector to road xsect, the spectrum change of road xsect optional position can be collected, thus achieve each detection by the motor vehicle of check point, this measurement mechanism does not affect road traffic, it also avoid the interference problem of multilane.
Although below invention has been described in conjunction with the preferred embodiments, but it should be appreciated by those skilled in the art, method and system of the present invention is not limited to the embodiment described in embodiment, when not deviating from the spirit and scope of the invention be defined by the appended claims, can various amendment, increase be made to the present invention and replace.
Claims (7)
1. a Design of Vehicle Tail Gas Analyzer, it is characterized in that, comprise: light source, gas detector, retroreflecting device and portal frame, wherein, described portal frame comprises two support bars that stand on road both sides and is connected described two support bars and is positioned at the cross bar above road, described light source and gas detector are installed on the cross bar of described portal frame, road surface below described portal frame is provided with reflection unit, and the retroreflecting device of the monitoring light beam that light source sends through road surface reflexes in described detector.
2. Design of Vehicle Tail Gas Analyzer as claimed in claim 1, it is characterized in that, described portal frame is also provided with speed detector, described speed detector comprises two range sensors along road direction, and two described range sensor intervals are arranged.
3. Design of Vehicle Tail Gas Analyzer as claimed in claim 2, it is characterized in that, described two range sensors lay respectively at the both sides, front and back of described gas detector.
4. Design of Vehicle Tail Gas Analyzer as claimed in claim 1, it is characterized in that, described retroreflecting device is the retroreflecting material being coated in described road surface.
5. Design of Vehicle Tail Gas Analyzer as claimed in claim 1, it is characterized in that, described retroreflecting device is the flat board that surface is coated with retroreflecting material, and described flat board is pasted onto road surface.
6. Design of Vehicle Tail Gas Analyzer as claimed in claim 1, it is characterized in that, described light source and gas detector are installed on crossbar center.
7. Design of Vehicle Tail Gas Analyzer as claimed in claim 1, it is characterized in that, described light source is silit infrared lamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510897679.3A CN105300914B (en) | 2015-12-04 | 2015-12-04 | A kind of Design of Vehicle Tail Gas Analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510897679.3A CN105300914B (en) | 2015-12-04 | 2015-12-04 | A kind of Design of Vehicle Tail Gas Analyzer |
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| CN105300914B CN105300914B (en) | 2018-05-15 |
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| CN105928896A (en) * | 2016-06-15 | 2016-09-07 | 汕头市胜霏尔环境科技有限公司 | Gas detection system based on safety laser multidimensional scanning |
| CN106680212A (en) * | 2016-12-31 | 2017-05-17 | 中国科学技术大学 | Vertical motor vehicle tail gas remote measuring system based on road surface reflection |
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2015
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| CN2903990Y (en) * | 2006-05-11 | 2007-05-23 | 安徽宝龙环保科技有限公司 | Speed measurer for motor vehicle |
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| CN105928896A (en) * | 2016-06-15 | 2016-09-07 | 汕头市胜霏尔环境科技有限公司 | Gas detection system based on safety laser multidimensional scanning |
| CN106680212A (en) * | 2016-12-31 | 2017-05-17 | 中国科学技术大学 | Vertical motor vehicle tail gas remote measuring system based on road surface reflection |
| CN106680212B (en) * | 2016-12-31 | 2019-04-26 | 中国科学技术大学 | A kind of rectilinear telemetering motor vehicle tail system based on road reflection |
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