CN201063022Y - Device for laser telemetry of double sensitiveness vehicle vent gas - Google Patents
Device for laser telemetry of double sensitiveness vehicle vent gas Download PDFInfo
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- CN201063022Y CN201063022Y CNU2007200401816U CN200720040181U CN201063022Y CN 201063022 Y CN201063022 Y CN 201063022Y CN U2007200401816 U CNU2007200401816 U CN U2007200401816U CN 200720040181 U CN200720040181 U CN 200720040181U CN 201063022 Y CN201063022 Y CN 201063022Y
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- 230000035945 sensitivity Effects 0.000 claims abstract description 8
- 230000009977 dual effect Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000012545 processing Methods 0.000 abstract description 4
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/031—Multipass arrangements
- G01N2021/0314—Double pass, autocollimated path
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N2021/1793—Remote sensing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
- G01N2021/3513—Open path with an instrumental source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—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
- G01N2021/399—Diode laser
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Abstract
The utility model relates to a double sensitivity remote laser measurement device for vehicle exhaust. The utility model is characterized in that: the transducer is a double loop structure, comprising two laser spot light sources with wavelength respectively 2004nm and 2330nm, two collimation lenses are correspondingly arranged to the light sources, and two condensation lens and two corresponding detectors are correspondingly arranged. When in measurement, the laser emitted from the light sources emits to a reflector through the collimation lenses, a signal varying with the light intensity is received by the detector and amplified, and A/D transferred and input to a computer for data processing. When the exhaust shields the light path between the transducer and the reflector, the exhaust concentration of vehicle can thus be measured; when no vehicle passes through the road, the exhaust concentration of the background of the environment can be detected by the system, thus realizing the double sensitivity gas monitoring. The utility model has the advantages of requiring no calibration, real time, high monitoring efficiency, allowing of unmanned duty and continuous running.
Description
Technical field
The utility model relates to and places road two sides, can measure passing vehicular emission tail gas CO, CO simultaneously
2The device of CO gas concentration in concentration and the environment.
Background technology
Existing motor-vehicle tail-gas telemetering device has two kinds: infrared incandescent light source in a kind of employing 3-5 micron wave length; Another kind is the mid-infrared light source of adopting wavelength 1578nm.The absorption band spectrum of mid-infrared light source detected gas molecule, the laser detection gas molecule of 1578nm are positioned near the absorption line spectrum the 1578nm wavelength.
Using the method that detects in the mid-infrared light source is the optical filter of placing corresponding monitoring gas before detector, compare by the light intensity of optical filter and the background light intensity of non-filtered sheet by measuring, thereby draw the concentration of tested gas, because secondary is measured not at synchronization, influenced by parasitic light and other materials, measuring error is bigger, needs often calibration during monitoring; The method of laser detection is to scan by output wavelength, make it inswept gas molecule and absorb line, strong and the background light intensity of the linear light that can be absorbed simultaneously, amplify by modulation absorption signal, draw gas absorption concentration at last, owing to obtain to such an extent that absorption signal and light intensity do not have direct relation after the modulation, also need before the measurement to calibrate.
Since in infrared be the absorption band spectral measurement, the absorption of 1578nm laser measurement is less, and two kinds of methods only can satisfy general exhaust emissions monitoring, needing can not realize the environment CO concentration monitor of higher sensitivity, owing to need calibration, can not realize the long-term operation continuously of unmanned.
The utility model content
The purpose of this utility model is: adopt the new pattern laser device to be applied to the motor-vehicle tail-gas remote measurement, can realize monitoring the continuous monitoring of CO gas in the site environment simultaneously and for common motor-vehicle tail-gas remote measurement, do not need calibration, be particularly useful for the long-term continuous monitoring of unmanned.
Technical solution of the present utility model is as follows:
The utility model comprises: transceiver 1, reverberator 2, laser instrument 3, detector 4, collimating mirror 5, condenser 6, power supply, driving and sweep circuit 7, modulation amplifying circuit 8, A/D Acquisition Circuit 9, linear amplifier circuit 10, A/D Acquisition Circuit 11, computing machine 12.Transceiver 1 is a two-channel structure, comprises two laser spots light sources, and wavelength is respectively 2004nm and 2330nm, corresponding with light source two collimating mirrors is set; Corresponding simultaneously two condensers 6 and the corresponding with it detector 4 of being provided with.Power supply, driving and sweep circuit 7 provide driving and sweep signal, provide working power for other circuit of native system simultaneously for laser instrument 3; Detector 4 outputs link to each other with linear amplifier circuit 10 modulated amplifiers 8, and the output of modulated amplifier 8 links to each other with A/D Acquisition Circuit 9; The output of linear amplifier circuit 10 links to each other with A/D Acquisition Circuit 11; The digital signal of A/ D Acquisition Circuit 9 and 11 outputs of A/D Acquisition Circuit flows to computing machine 12 through distinguish display environment gas CO concentration and motor-vehicle tail-gas CO, CO2 concentration after the data processing on its display.
The good effect that the utility model had is:
Having used dexterously has the strong new pattern laser light source that absorbs to CO, CO2 gas, can realize the monitoring of CO, CO2 gas concentration simultaneously and to the continuous monitoring of low concentration CO gas in the site environment to automotive emission, also simultaneously speed, acceleration and the length of measuring machine motor-car realize license plate for vehicle identification simultaneously.But have need not to calibrate, real-time, the monitoring efficient height unmanned advantage of operation continuously.
Description of drawings
Fig. 1 is a system chart of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Specific embodiments
Be further described below in conjunction with accompanying drawing the utility model.
Referring to Fig. 1, the dual sensitivity Design of Vehicle Tail Gas Analyzer comprises transceiver 1, reverberator 2, laser instrument 3, detector 4, collimating mirror 5, condenser 6, power drives and sweep circuit 7, modulation amplifying circuit 8, A/D Acquisition Circuit 9, linear amplifier circuit 10, A/D Acquisition Circuit 11, computing machine 12.Transceiver 1 is a two-channel structure, comprises that two laser spots power supplys, wavelength are respectively 2004nm and 2330 and corresponding with light source two collimating mirrors are set; Two condensers 6 and corresponding with it detector 4 are set simultaneously.Power supply, driving and sweep circuit drive and sweep signal for laser instrument 3 provides, and provide working power for other circuit of native system simultaneously.The output of detector 4 links to each other with linear amplifier 10 modulated amplifiers 8.The output of modulated amplifier 8 links to each other with A/D Acquisition Circuit 9.The output of linear amplifier 10 links to each other with A/D Acquisition Circuit 11.The digital signal of A/ D Acquisition Circuit 9 and 11 outputs of A/D Acquisition Circuit flows to computing machine 12, through distinguish display environment gas CO concentration and motor-vehicle tail-gas CO, CO2 concentration after the data processing on its display.
During measurement, the laser that sends from the transceiver LASER Light Source is transmitted into reverberator through the collimating mirror collimation, the laser that returns through reverberator is converged on the detector by condenser, and signal input computing machine after amplification, A/D conversion that detector obtains changing with light intensity carries out data processing.When tail gas blocks light path between transceiver and the reverberator, detector obtains spectral signal, give computing machine through the data acquisition circuit that linear amplifier amplifies with this signal, by computed in software go out monitoring gas concentration, realize measurement to automotive emission concentration; When not having motor vehicle to pass through, system's testing environment background gas concentration is given computing machine through the data acquisition circuit that modulation amplifying circuit amplifies with signal, has realized the gas-monitoring of dual sensitivity.Data can send to monitoring center by wireless transmission method.
Come the length scanning signal S1 drive laser of the appropriate frequency of self-driven and sweep circuit as can be known by accompanying drawing 2, make laser instrument periodically send wavelength optical signals, be beneficial to the detection of the absorption of gas, the modulation signal S2 that adds appropriate frequency simultaneously improves the antijamming capability of system and to the sensitivity of gas absorption.Detector changes into electric signal with the light signal that receives and handles by direct current amplification and two kinds of methods of modulation amplification respectively, and directly the mode of amplifying is used for detecting the gas absorption of higher concentration, modulates the gas absorption that the amplification mode is used for detecting low concentration.C is a block isolating circuit among Fig. 2, and resonator Y only allows the signal of characteristic frequency to enter follow-up amplifier, have highly sensitive, the advantage that antijamming capability is strong.
Claims (1)
1. dual sensitivity motor-vehicle tail-gas laser telemetry device, comprise transceiver (1), reverberator (2), laser instrument (3), detector (4), collimating mirror (5), condenser (6), power supply, drive, and sweep circuit (7), modulation amplifying circuit (8), A/D Acquisition Circuit (9), linear amplifier circuit (10), A/D Acquisition Circuit (11) and computing machine (12), it is characterized in that: described transceiver (1) is two-channel structure, comprise two laser instruments, its laser spots optical source wavelength is respectively 2004nm and 2330nm, corresponding with light source two collimating mirrors is set; Correspondence is provided with two condensers (6) and corresponding with it detector (4) simultaneously; Sweep circuit (7) links to each other with laser instrument (3); Detector (4) output terminal links to each other with linear amplifier circuit (10) modulated amplifier (8), and the output terminal of modulated amplifier (8) links to each other with A/D Acquisition Circuit (9); The output terminal of linear amplifier circuit (10) links to each other with A/D Acquisition Circuit (11); A/D Acquisition Circuit (9) links to each other with computing machine respectively with A/D Acquisition Circuit (11) output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200401816U CN201063022Y (en) | 2007-06-25 | 2007-06-25 | Device for laser telemetry of double sensitiveness vehicle vent gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200401816U CN201063022Y (en) | 2007-06-25 | 2007-06-25 | Device for laser telemetry of double sensitiveness vehicle vent gas |
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| Publication Number | Publication Date |
|---|---|
| CN201063022Y true CN201063022Y (en) | 2008-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200401816U Expired - Fee Related CN201063022Y (en) | 2007-06-25 | 2007-06-25 | Device for laser telemetry of double sensitiveness vehicle vent gas |
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| CN (1) | CN201063022Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726466B (en) * | 2009-12-01 | 2011-04-20 | 康宇 | Multilane motor vehicle exhaust remote measuring device |
| CN102128802A (en) * | 2010-11-30 | 2011-07-20 | 中国科学技术大学 | Multi-lane motor vehicle tail gas detection system |
| CN102252988A (en) * | 2011-04-19 | 2011-11-23 | 珠海市中科信息技术开发有限公司 | On-line monitoring method for motor vehicle tail gas monitoring system |
| CN103884678A (en) * | 2014-04-16 | 2014-06-25 | 北京航星网讯技术股份有限公司 | Automatic cruise type laser methane gas concentration monitoring device |
| CN105300914A (en) * | 2015-12-04 | 2016-02-03 | 安徽宝龙环保科技有限公司 | Motor vehicle exhaust detection device |
| 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 |
| CN106290083A (en) * | 2016-10-12 | 2017-01-04 | 上海舵杰汽车检测仪器有限公司 | A kind of monitoring device becoming wavelength laser remote measurement motor vehicle emission situation and method |
| CN106383097A (en) * | 2016-11-16 | 2017-02-08 | 浙江多普勒环保科技有限公司 | Tunable-laser-based motor vehicle exhaust gas remote sensing detection system and method |
| CN108007890A (en) * | 2017-10-20 | 2018-05-08 | 北京雪迪龙科技股份有限公司 | A kind of motor-vehicle tail-gas detection light beam reflection unit and detecting system |
| CN108827912A (en) * | 2018-04-11 | 2018-11-16 | 黑龙江工程学院 | A kind of method of synchronous precise measurement multiple gases concentration |
-
2007
- 2007-06-25 CN CNU2007200401816U patent/CN201063022Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726466B (en) * | 2009-12-01 | 2011-04-20 | 康宇 | Multilane motor vehicle exhaust remote measuring device |
| CN102128802A (en) * | 2010-11-30 | 2011-07-20 | 中国科学技术大学 | Multi-lane motor vehicle tail gas detection system |
| CN102128802B (en) * | 2010-11-30 | 2012-09-26 | 中国科学技术大学 | Multi-lane motor vehicle tail gas detection system |
| CN102252988A (en) * | 2011-04-19 | 2011-11-23 | 珠海市中科信息技术开发有限公司 | On-line monitoring method for motor vehicle tail gas monitoring system |
| CN102252988B (en) * | 2011-04-19 | 2013-06-12 | 珠海市中科信息技术开发有限公司 | On-line monitoring method for motor vehicle tail gas monitoring system |
| CN103884678A (en) * | 2014-04-16 | 2014-06-25 | 北京航星网讯技术股份有限公司 | Automatic cruise type laser methane gas concentration monitoring device |
| CN105300914B (en) * | 2015-12-04 | 2018-05-15 | 安徽宝龙环保科技有限公司 | A kind of Design of Vehicle Tail Gas Analyzer |
| CN105300914A (en) * | 2015-12-04 | 2016-02-03 | 安徽宝龙环保科技有限公司 | Motor vehicle exhaust detection device |
| 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 |
| CN106290083A (en) * | 2016-10-12 | 2017-01-04 | 上海舵杰汽车检测仪器有限公司 | A kind of monitoring device becoming wavelength laser remote measurement motor vehicle emission situation and method |
| CN106290083B (en) * | 2016-10-12 | 2023-06-27 | 上海舵杰汽车检测仪器有限公司 | Monitoring device and method for variable wavelength laser telemetering automobile emission condition |
| CN106383097A (en) * | 2016-11-16 | 2017-02-08 | 浙江多普勒环保科技有限公司 | Tunable-laser-based motor vehicle exhaust gas remote sensing detection system and method |
| CN106383097B (en) * | 2016-11-16 | 2024-01-19 | 大连中汇达科学仪器有限公司 | Remote sensing detection system and method for motor vehicle tail gas based on tunable laser |
| CN108007890A (en) * | 2017-10-20 | 2018-05-08 | 北京雪迪龙科技股份有限公司 | A kind of motor-vehicle tail-gas detection light beam reflection unit and detecting system |
| CN108827912A (en) * | 2018-04-11 | 2018-11-16 | 黑龙江工程学院 | A kind of method of synchronous precise measurement multiple gases concentration |
| CN108827912B (en) * | 2018-04-11 | 2020-09-11 | 黑龙江工程学院 | Method for synchronously and accurately measuring concentrations of multiple gases |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080521 Termination date: 20120625 |