CN101726466B - Multilane motor vehicle exhaust remote measuring device - Google Patents
Multilane motor vehicle exhaust remote measuring device Download PDFInfo
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- CN101726466B CN101726466B CN 200910241681 CN200910241681A CN101726466B CN 101726466 B CN101726466 B CN 101726466B CN 200910241681 CN200910241681 CN 200910241681 CN 200910241681 A CN200910241681 A CN 200910241681A CN 101726466 B CN101726466 B CN 101726466B
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Abstract
A multilane motor vehicle exhaust remote measuring device comprises a vehicle road condition recognizing unit, a license plate recording unit, a vehicle velocity and acceleration measuring unit, a polluted gas monitoring unit by using infrared and ultraviolet absorption spectrometry and a control and data analysis/processing unit. The device can obtain the real-time condition of vehicle driving on one-way or two-way multilane pavement, accurately obtain various exhaust concentrations, velocity, acceleration and license plate number when only one vehicle drives on multiple lanes in a short time and complete preliminary exhaust analysis and license plate obtainment when a plurality of vehicles drive on multiple lanes simultaneously.
Description
Technical field
The present invention relates to a kind of multilane motor vehicle exhaust remote measuring device, belong to the Environmental Technology field.
Background technology
The motor-vehicle tail-gas telemetry system can be finished emission detections under the vehicle normal operating condition, compare with the emission detections mode of idling method and operating condition method, more can reflect the actual discharge situation on road surface.The motor-vehicle tail-gas telemetering device need will detect light beam (IR or (with) UV) pass the discharge tail gas air mass, so should place light emitted device and receiver on both sides of the road respectively in the road, or transmitter and receiver be placed on road the same side, reflective optical system is at the road opposite side.This device can be measured carrying out exhaust emissions by the vehicle that detects light beam in the bicycle road surface, and the license number of measurement result and synchronous shooting record is corresponding.The motor-vehicle tail-gas telemetry is the effective ways of screening high emission vehicle.But, realize the condition restriction that the motor-vehicle tail-gas remote measurement exists the road surface facility to install at multilane (2 tracks or more than 2 tracks).Present tail gas telemetry system both domestic and external is all carried out work on the wall scroll track, for example isolate a track in the less multilane of road surface broad, vehicle temporarily, perhaps carries out on expressway charge mouth or viaduct wall scroll ring road.This situation is an acceptable for experimental study, but if in the emission detections of carrying out on the main roads of city under the true road conditions, high emission vehicle is screened, and does not influence the road surface cruising, unusual difficulty, even can't realize.
The method that existing multilane tail gas remote measurement patent proposes has very big application limitation, perhaps can't practical application.This method for example, reverberator or certain class device are installed in (1) hard shoulder between two tracks, and the road that has hard shoulder between every track is seldom, so can't be used on most roads; (2) in the road both sides tail gas telemetry equipment is set according to existing mode, when two cars passes through light beam simultaneously, utilizes certain algorithm to calculate the exhaust emissions amount of every amount car, this equipment has sizable uncertainty, is difficult to practical application.
Summary of the invention
Technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, a kind of multilane motor vehicle exhaust remote measuring device is provided, whether real-time telemetry and monitoring automatically in the automotive emission of travelling on unidirectional or two-way multilane, identifying driving vehicle is the disposal of pollutants vehicle if being carried out.
Technical solution of the present invention: multilane motor vehicle exhaust remote measuring device, form by vehicle road conditions recognition unit, license plate record cell, car speed and acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means, control and data analysis processing unit, wherein:
Vehicle road conditions recognition unit is made up of the road conditions video camera, video detector and the road conditions control computer that are positioned at the road top; Road conditions video camera is installed in the road top, according to selected installation site and angle, makes road conditions video camera can photograph the pavement image in 2-4 track, and road conditions video camera is connected with video detector, the image that it obtained is delivered to video detector handle;
Video detector receives the image from road conditions video camera, the multi-lane pavement picture that road conditions video camera is obtained is divided into three continuous highway sections vertical with road direction, in each highway section, virtual coil is set then, the wagon detector that simulation is actual, judge on three highway sections in every track with this whether vehicle ' is arranged, the traffic information with three highway sections, every track sends the road conditions control computer to simultaneously; Road conditions control computer and video detector, control and data analysis processing unit carry out communication, the traffic information combination in three highway sections in many tracks that video detector is sent here, form the coding that whether satisfies in the remote measurement of the enterprising end of line gas of multilane, send to control and data analysis processing unit then;
The license plate record cell comprises the car plate video camera, is installed in the capure card in the road conditions control computer and licence plate candid photograph processing and identification module in the vehicle road conditions recognition unit; Every the track is equipped with the car plate video camera, is installed in road top, and the license plate image of finishing the tested vehicle that travels on the track, place obtains the video capture card connection in car plate video camera and the road conditions control computer, the license plate image of transmission vehicle; The vehicle pictures that the licence plate candid photograph is handled and identification module is taken the car plate video camera that is installed in the road conditions control computer is handled, obtain the license board information of vehicle, according to the communication mode of road conditions control computer, result is delivered to control and data analysis processing unit;
Car speed and acceleration measurement unit: this unit is made up of with receiver, timing processing module three groups of optical transmitting sets that are positioned at the road arranged on both sides; Vehicle ' during by the test section three groups of optical transmitting sets send three light beams and successively be blocked, the timing processing module is according to blocking speed and the acceleration that Time Calculation goes out vehicle ', the timing processing module has the communication function with control and data analysis processing unit, will detect to such an extent that car speed and acceleration information send control and data analysis processing unit to; Car speed and acceleration measurement unit are given license plate record cell, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means transmission enabling signal after obtaining measuring-signal;
Infrared and ultraviolet absorption spectroscopy dusty gas monitoring means: comprise Infrared survey part, uv measurement part and signal processing apparatus; Infrared survey is partly measured CO and the CO in the tail gas
2Infrared absorption spectrum, concentration is measured in inverting according to infrared standard absorption spectrum; The ultra-violet absorption spectrum of NO and HC in the ultraviolet portion measurement tail gas, concentration is measured in inverting according to ultraviolet standard absorption spectrum; Signal processing apparatus receives the emission information from the various tail gas of Infrared survey part and uv measurement part, carry out computing, obtain the discharge value of the various tail gas of vehicle, signal processing apparatus possesses the communication function with control and data analysis processing unit, sends the emission from vehicles data that obtain to control and data analysis processing unit;
Control and the data analysis processing unit, receive the road conditions coded message in three highway sections of multilane of sending here from vehicle road conditions recognition unit, automatic decoding is also analyzed decoded traffic information, judges whether the compliance with system testing conditions; When the compliance with system testing conditions, give license plate record cell, car speed and acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means transmission preliminary work signal, vehicle is detected; Control and data analysis processing unit reception are from each testing result of license plate record cell, car speed and acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means, carry out data analysis, processing, coupling and storage, and send to remote data control center by the information of vehicles of communication interface after with analyzing and processing.
The present invention's beneficial effect compared with prior art is: the real time status that can obtain unidirectional or two-way multi-lane pavement vehicle ', accurately obtain multiple tail gas concentration, speed, acceleration and license plate number when having only a car to travel on the multilane in the short time, tail gas initial analysis and the license plate number that also can finish when having many cars to travel on the multilane are simultaneously obtained.
Description of drawings
Fig. 1 is the cell schematics of multilane motor-vehicle tail-gas telemetry system of the present invention;
Fig. 2 is the road condition analyzing synoptic diagram of multilane motor-vehicle tail-gas telemetry system of the present invention;
Fig. 3 is the speed and the acceleration unit functional schematic of multilane motor-vehicle tail-gas telemetry system of the present invention;
Fig. 4 is the dusty gas monitoring means fundamental diagram of multilane motor-vehicle tail-gas telemetry system of the present invention;
The synoptic diagram of Fig. 5 multilane motor-vehicle tail-gas of the present invention telemetry system.
Embodiment
The present invention proposes a kind of monitoring system that places road both sides and top that the tail gas of driving vehicle on unidirectional and two-way multilane is carried out real-time telemetry.The present invention adopts the identification of video road conditions to multilane vehicle ' location recognition, adopts infrared absorption spectroscopy, ultraviolet difference absorption spectroscopy to pollutant CO, CO in the Vehicular exhaust
2, NO, NO2, HC and flue dust monitor automatically.
As shown in Figure 1, multilane motor vehicle exhaust remote measuring device of the present invention is made up of vehicle road conditions recognition unit, license plate record cell, car speed and acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means, control and data analysis processing unit.
1. multilane vehicle road conditions recognition unit is made up of the road conditions video camera, video detector and the road conditions control computer that are positioned at the road top.
Road conditions video camera can be a video camera or digital camera, is installed in the road top, according to selected installation site and angle, makes road conditions video camera can photograph the pavement image in 2-4 track.The subsidiary rain shield of installing of road conditions video camera, the light filling lamp also can be installed if need monitor at night by system.Road conditions video camera is connected with video detector, the image that it obtained can be delivered to video detector and handle.
Video detector comprises a treatment facility, can an industrial computer or other processor.Video detector finish that the image that road conditions video camera is obtained is handled and and miscellaneous equipment between communication, as the road conditions control computer.Flame Image Process can be taked following method: receive the image from road conditions video camera, the multi-lane pavement picture that video camera is obtained is divided into three continuous highway sections vertical with road direction, in each highway section, virtual coil is set then, the wagon detector (as ground induction coil) that simulation is actual judges on three highway sections in every track with this whether vehicle ' is arranged.Video detector can send the traffic information in three highway sections, every track to the road conditions control computer, and communication modes can be taked wired or wireless mode.
The road conditions control computer comprises a treatment facility, can be an industrial computer or other processor.The road conditions control computer can be carried out communication with video detector and control and data analysis processing unit, and communication modes can be taked wired or wireless mode.The road conditions control computer is selected the traffic information combination in three highway sections in each bar track that video detector is sent here, forms the coding that whether satisfies in the remote measurement of the enterprising end of line gas of multilane, sends to control and data analysis processing unit then.
2. the license plate record cell comprises the car plate video camera and is placed on the interior capure card of road conditions control computer, licence plate candid photograph processing and identification module.
Every there is a cover car plate video camera in the track, and the car plate video camera can be a video camera or digital camera, is installed in the road top, the subsidiary rain shield of installing of car plate video camera, and the light filling lamp also can be installed if need monitor at night by system.The license plate image that the car plate video camera is finished the tested vehicle that travels on the track, place obtains.The car plate video camera transmits the license plate image of vehicle by the video capture card connection in cable or alternate manner and the road conditions control computer.
The vehicle pictures that the licence plate candid photograph is handled and identification software is taken the car plate video camera that is installed in the road conditions control computer is handled, and obtains the license board information of vehicle, as car plate color and license plate number.According to the communication mode of road conditions control computer, result can also be delivered to control and data analysis processing unit.
3. car speed and acceleration measurement unit: this unit can be three groups of optical transmitting sets, reverberator, receiver and the timing processing module that is positioned at the road arranged on both sides.Can take laser beam or other light beam, transmitter can be light emitting diode or other emitter, reverberator can be level crossing, corner reflector or other reflection unit, receiver is optional with photosensitive tube or other receiving trap, and the timing processing module can be selected Single Chip Microcomputer (SCM) system or other processing module for use.Vehicle ' is successively blocked three light beams during by the test section, and the timing processing module is carried out timing to the time of blocking respectively, and goes out the speed and the acceleration of vehicle ' according to the distance calculation between the light beam.The timing processing module has the communication function with computer control and data analysis processing unit, as the serial port by single-chip microcomputer, sends detected car speed and acceleration information to control and data analysis processing unit.Car speed and acceleration measurement unit are given license plate record cell, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means transmission enabling signal after obtaining measuring-signal, make each measurement data of tested vehicle to be mapped.This unit can be installed in transmitter and receiver one side of road, and reverberator is installed in the opposite side of road, and the transmitter emitted light beams is got back to receiver by reverberator; Reverberator also can not placed in this unit, and transmitter and receiver is placed on the both sides of road respectively.Other suitable disposal route and detection method also can be taked in this unit.
Infrared and ultraviolet absorption spectroscopy dusty gas monitoring means: comprise Infrared survey part, uv measurement part and signal processing apparatus.Infrared survey is partly by CO and CO in the tuning laser wavelength measurement tail gas
2The commentaries on classics absorption line intensity that shakes, concentration is measured in inverting according to infrared standard absorption spectrum.The ultra-violet absorption spectrum of NO and HC in the ultraviolet portion measurement tail gas, concentration is measured in inverting according to ultraviolet standard absorption spectrum.
Signal processing apparatus comprises a treatment facility, can be an industrial computer or other processor.Signal processing apparatus receives the emission information from the various tail gas of receiver, carries out computing, obtains the discharge value of the various tail gas of vehicle.Signal processing apparatus possesses the communication function with control and data analysis processing unit, and communication mode can be wireless or wired mode.Signal processing apparatus sends the emission from vehicles data that obtain to control and data analysis processing unit.
4. control and data analysis processing unit comprise a treatment facility that is placed on the roadside, can be industrial computer or other processors that configuration is higher, and have at least one communication interface, and communication mode can be wireless or wired mode.
Control and data analysis processing unit receive the road conditions coded message in three highway sections of multilane of sending here from multilane vehicle road conditions recognition unit, and automatic decoding is also analyzed decoded traffic information, judges whether the compliance with system testing conditions.When condition meets, give license plate record cell, car speed acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means transmission preliminary work signal, vehicle is detected.
Control and data analysis processing unit reception simultaneously is from each testing result of license plate record cell, car speed acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means, carry out data analysis, processing, coupling and storage, and send to remote data control center by the information of vehicles of communication interface after with analyzing and processing.
As Fig. 1, the course of work of the present invention is as follows, vehicle road conditions recognition unit detects the multilane traffic information, encode and deliver to control and the decoding of data analysis processing unit, control and data analysis processing unit judge whether to satisfy the tail gas testing conditions, if satisfy, then in conjunction with the speed acceleration unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means, the license plate record cell sends ready signal, when vehicle process speed and acceleration unit detection, speed and acceleration unit begin to take pictures for license plate record cell transmission enabling signal, sending enabling signal to infrared and ultraviolet absorption spectroscopy dusty gas monitoring means begins to detect, preserve data, last each detecting unit will detect data and pass to control and data processing unit, carry out Data Matching, analyze, do further processing, preserve, send to remote data control center.
Control and data processing unit are set up a database for detecting data, control and data processing unit are after each unit sends ready signal, each unit detects and will detect data and sends it back, control and data processing unit carry out format conversion with all data, and as a field store in the database, every data are as a record in the field.To detect data, produce the visual monitor interface simultaneously.
As Fig. 2, track in each two field picture that video detector obtains road conditions video camera is divided into 3 sections, and place a virtual coil 21 in each section, such as on the road surface, drawing one horizontal line, simulate actual wagon detector, as ground induction coil, under same background, judge by the variation of analysis image gray scale whether this highway section has vehicle, under the normal condition, environmental change is not obvious in short time, variation of image grayscale is also big, and as car through out-of-date, the gray scale generation significant change of virtual coil position, can a threshold value be set to the variation of image grayscale value, as the foundation that judges whether that car passes through.Be the interference of emission from vehicles before and after preventing, the distance in A highway section and C highway section is about a vehicle commander (middle-size and small-size vehicle), about 4-5 rice.The B section is about two vehicle commanders, about 8-10 rice.The road conditions control computer is encoded according to the car status information in each highway section, track, and coding can have multiple mode, sends control and data processing unit decoding to by communication interface (wireless or wired mode) at last, judges whether to satisfy testing conditions.
Provide an example of traffic information coding below.As Fig. 2, every track is divided into A, B and three highway sections of C, if video detector detects car coding 1 is arranged on certain highway section, no car coding 0.If the A highway section in track 1 does not have car so, B does not have car in the highway section, and there is car in the C highway section, and then track 1 is encoded to 001.This moment, then these moment road conditions was encoded to 001 010 011 100 if the coding in track 2, track 3 and track 4 is respectively 010,011 and 110.
As Fig. 3, three groups of transmitters of car speed and acceleration measurement unit and receiver 34 are placed on road on one side, and reverberator 35 is placed on the another side of road.The light beam 31,32,33 that three groups of transmitters send passes road, reflects through reverberator 35, is received by three group of receivers.When vehicle process speed and acceleration measurement unit, the three beams light 31,32,33 that three groups of transmitters send is blocked successively, start the internal clocking processing module and carry out timing, timing circuit obtains automobile respectively and is respectively T1 and T2 by light 31 and 32, time of 32 and 33 in the timing processing module, distance between the light beam is respectively L1 and L2, and the computing unit in the then timing processing module calculates the speed of automobile in this time period
Acceleration
Also can calculate speed and acceleration according to other method.If this moment, system was in detected state, speed and acceleration measurement unit are given license plate record cell, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means transmission enabling signal, by communication interface measured data are sent to control and data analysis processing unit simultaneously.
As Fig. 4, Infrared survey is partly measured CO in the tail gas and the infrared absorption spectrum of CO2, and concentration is measured in inverting according to infrared standard absorption spectrum.Infrared survey partly comprises control logic circuit, current control unit, temperature control unit, infrared transmitter (can select tunable diode laser, infrared semiconductor laser or other infrared transmitter for use), reverberator, infrared remote receiver, signal processing circuit and A/D conversion.Control logic circuit provides sweep signal and modulation signal and makes current control unit and temperature control unit operate as normal, the working temperature and the drive current of control infrared semiconductor laser, under the effect of driving circuit, infrared semiconductor laser sends the Infrared of specific wavelength and crosses road, infrared light after Vehicular exhaust absorbs is received by infrared remote receiver, be converted to electric signal, after signal processing circuit amplification, filtering, A/D conversion, faint simulating signal becomes the digital signal that control can be discerned, and delivers to signal processing apparatus (can be industrial computer).
An above-mentioned side that infrared transmitter can be installed in road, infrared remote receiver is installed in the opposite side of road, and perhaps infrared transmitter and infrared remote receiver are installed in the same side of road, and reverberator is installed in the opposite side of road.
As Fig. 4, uv measurement is partly measured the ultra-violet absorption spectrum of NO and HC in the tail gas, and concentration is measured in inverting according to ultraviolet standard absorption spectrum.Uv measurement partly comprises ultraviolet emission device driving circuit (the present invention selects the deuterium lamp driving circuit for use), ultraviolet emission device (the present invention selects deuterium lamp for use), reverberator and ultraviolet receiver (the present invention selects spectrometer for use).The deuterium lamp driving circuit provides the drive current and the voltage of operate as normal for deuterium lamp, the ultraviolet light that deuterium lamp sends specific wavelength crosses road, ultraviolet light after Vehicular exhaust absorbs is received by spectrometer, thereby be absorbed spectrum, at last the result delivered to signal processing apparatus (can be industrial computer).
The ultraviolet emission device can be installed in a side of road, the ultraviolet receiver is installed in the opposite side of road, and perhaps ultraviolet emission device and receiver are installed in the same side of road, and reverberator is installed in the opposite side of road.
Certainly Infrared survey device and uv measurement device also can be bought from the market, as long as can measure CO and CO
2Infrared absorption spectrum and the ultra-violet absorption spectrum of NO and HC get final product.
Infrared survey part and uv measurement principle partly is based on the Beer-Lambert law:
I(λ)＝I
0(λ)exp(-σ(λ)cL)
Wherein, I (λ) is the transmitted light spectral intensity, I
0(λ) be the initial strength of laser, σ (λ) is the molecular absorption coefficient of af at wavelength lambda, and c is the concentration of absorbing material, and L is total light path.Detect light intensity according to infrared remote receiver, thereby calculate CO and CO
2Concentration; According to the spectrometer detected value, thus the concentration of calculating NO and HC.
As shown in Figure 5, road conditions video camera 52 of the present invention, video detector 53 and road conditions control computer 54 are installed in the multi-lane pavement top, select suitable road conditions video camera placement location and angle, a road conditions video camera can monitor 2-4 bar track, and a chassis board video camera 51 is installed in top, every track.Speed and acceleration measurement unit 56a and 56b and infrared and ultraviolet absorption spectroscopy dusty gas monitoring means 55a and 55b are placed on the both sides of road, control and data analysis processing unit, and promptly industrial computer 57 is installed in roadside or the monitoring car.
When the short time multilane has only a car, road conditions video camera 52 sends the image that obtains to video detector 53 and analyzes, video detector 53 gives analysis result the road conditions control computer 54 codings then, and road conditions control computer 54 sends to industrial computer 57 to coded message again.Industrial computer 57 is notified car plate video camera 52 preliminary works infrared and ultraviolet absorption spectroscopy dusty gas monitoring means 55a and 55b and corresponding track according to decoded result, when vehicle during by car speed and acceleration unit, the visible light that the three couples of transmitter 56a send is blocked successively, calculate the speed and the acceleration of vehicle according to blocking time, start infrared simultaneously and ultraviolet absorption spectroscopy dusty gas monitoring means 55a and 55b and car plate video camera 52.Vehicle is during through infrared and ultraviolet absorption spectroscopy dusty gas monitoring means 55a and 55b, and being partially absorbed respectively by infrared light and ultraviolet light detects the discharge value of each dusty gas.Simultaneously, car plate video camera 51 photographs the pictorial information of vehicle, delivers to road conditions control computer 54 and handles and license plate identification, and then, all detection data are delivered to industrial computer 57 and handled and send.
When have in the short time many cars by the time, two cars for example.The road conditions recognition system is analyzed this situation and is encoding to industrial computer 57.After industrial computer 57 decoding, (for example, as Fig. 2, there is car in the B highway section in every track, and A, C highway section do not have car, are considered as satisfying testing conditions, and promptly coding equals moment of 010 010 010 010 and begins to detect to judge whether to satisfy testing conditions.Notify car plate video camera 51 preliminary works in corresponding two tracks after satisfying.Testing result should be smaller or equal to two cars discharging sum, by discrimination threshold being set (for example, be limited to M in the discharging of local CO, threshold value can be made as a*M, the scope of a is determined by the experimental result of carrying out on this ground), can to whether existing high emission vehicle (, promptly being considered as high emission vehicle) tentatively to judge as long as surpass the local discharging upper limit of setting because different cities allows the upper limit of concentration difference of discharging.For suspicious situation, can analyze again or manual examination and verification according to the license board information of being obtained.Can similarly handle for the situation more than the two cars.
Claims (1)
1. multilane motor vehicle exhaust remote measuring device, it is characterized in that: form by vehicle road conditions recognition unit, license plate record cell, car speed and acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means, control and data analysis processing unit, wherein:
Vehicle road conditions recognition unit is made up of the road conditions video camera, video detector and the road conditions control computer that are positioned at the road top; Road conditions video camera is installed in the road top, according to selected installation site and angle, makes road conditions video camera can photograph the pavement image in 2-4 track, and road conditions video camera is connected with video detector, the image that it obtained is delivered to video detector handle;
Video detector receives the image from road conditions video camera, the multi-lane pavement picture that road conditions video camera is obtained is divided into three continuous highway sections vertical with road direction, in each highway section, virtual coil is set then, the wagon detector that simulation is actual, judge on three highway sections in every track with this whether vehicle ' is arranged, the traffic information with three highway sections, every track sends the road conditions control computer to simultaneously; Road conditions control computer and video detector, control and data analysis processing unit carry out communication, the traffic information combination in three highway sections in many tracks that video detector is sent here, form the coding that whether satisfies in the remote measurement of the enterprising end of line gas of multilane, send to control and data analysis processing unit then;
The license plate record cell comprises the car plate video camera, is installed in the capure card in the road conditions control computer and licence plate candid photograph processing and identification module in the vehicle road conditions recognition unit; Every the track is equipped with the car plate video camera, is installed in road top, and the license plate image of finishing the tested vehicle that travels on the track, place obtains the video capture card connection in car plate video camera and the road conditions control computer, the license plate image of transmission vehicle; The vehicle pictures that the licence plate candid photograph is handled and identification module is taken the car plate video camera that is installed in the road conditions control computer is handled, obtain the license board information of vehicle, according to the communication mode of road conditions control computer, result is delivered to control and data analysis processing unit;
Car speed and acceleration measurement unit: this unit is made up of the three groups of optical transmitting sets, receiver, the timing processing module that are positioned at the road arranged on both sides, and transmitter and receiver are placed on the both sides of road respectively; Vehicle ' during by the test section three groups of optical transmitting sets send three light beams and successively be blocked, the timing processing module is according to blocking speed and the acceleration that Time Calculation goes out vehicle ', the timing processing module has the communication function with control and data analysis processing unit, sends detected car speed and acceleration information to control and data analysis processing unit; Car speed and acceleration measurement unit are given license plate record cell, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means transmission enabling signal after obtaining measuring-signal;
Infrared and ultraviolet absorption spectroscopy dusty gas monitoring means: comprise Infrared survey part, uv measurement part and signal processing apparatus; Infrared survey is partly measured CO and the CO in the tail gas
2Infrared absorption spectrum, concentration is measured in inverting according to infrared standard absorption spectrum; The ultra-violet absorption spectrum of NO and HC in the ultraviolet portion measurement tail gas, concentration is measured in inverting according to ultraviolet standard absorption spectrum; Signal processing apparatus receives the emission information from the various tail gas of Infrared survey part and uv measurement part, carry out computing, obtain the discharge value of the various tail gas of vehicle, signal processing apparatus possesses the communication function with control and data analysis processing unit, sends the emission from vehicles data that obtain to control and data analysis processing unit;
Control and the data analysis processing unit, receive the road conditions coded message in three highway sections of multilane of sending here from vehicle road conditions recognition unit, automatic decoding is also analyzed decoded traffic information, judges whether the compliance with system testing conditions; When the compliance with system testing conditions, give license plate record cell, car speed and acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means transmission preliminary work signal, vehicle is detected; Control and data analysis processing unit reception are from each testing result of license plate record cell, car speed and acceleration measurement unit, infrared and ultraviolet absorption spectroscopy dusty gas monitoring means, carry out data analysis, processing, coupling and storage, and send to remote data control center by the information of vehicles of communication interface after with analyzing and processing.
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