CN2511522Y - Monitor on roadside for automobile exhaust - Google Patents
Monitor on roadside for automobile exhaust Download PDFInfo
- Publication number
- CN2511522Y CN2511522Y CN 01263069 CN01263069U CN2511522Y CN 2511522 Y CN2511522 Y CN 2511522Y CN 01263069 CN01263069 CN 01263069 CN 01263069 U CN01263069 U CN 01263069U CN 2511522 Y CN2511522 Y CN 2511522Y
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- CN
- China
- Prior art keywords
- diode laser
- detector
- absorption cell
- beam splitter
- road
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a monitor on roadside for automobile exhaust, comprising a diode laser arranged on a light path, a reference absorption cell (3), a detector, a light reflector (7) arranged at the other side of a road (6), and a data processing controller (9) in electric connection with the diode laser and the detector. The utility model is characterized in that the diode laser is a distributed feedback diode laser (1); the detector is an indium antimonide detector (8); a beam splitter (2) is arranged between the output end of the distributed feedback diode laser (1) and the input end of the reference absorption cell (3); the distributed feedback diode laser (1), the beam splitter (2), the reference absorption cell (3), an optical fiber pigtail (5) and the indium antimonide detector (8) arranged at one side of the road (6) are connected by optical fibers(4). The utility model has the characteristics of being easy to carry out real-time monitoring in the field, along with simple structure, small volume, high monitoring precision, and low construction and operation cost. The utility model can be widely used in real-time monitoring of motor vehicle exhaust.
Description
One, technical field
The utility model relates to a kind of vehicle exhaust roadside monitor.
Two, background technology
Motor-vehicle tail-gas is the major cause that causes the urban atmosphere deterioration, and by statistics, its pollution that causes accounts for more than 60% of entire city atmospheric contamination.At present, people are in order to monitor in real time motor-vehicle tail-gas, the normal laser that uses scans fast to the molecule absorption spectrum peak of tail gas to be measured, to determine its molecular conecentration according to absorption intensity, as " the tunable diode laser system of roadside remote measurement vehicle exhaust " literary composition in Germany's " Applied Physics " (B collects) the 4th phase magazine of publishing in October, 1998 a kind of vehicle exhaust real-time monitoring device was disclosed once; Its light path that constitutes is provided with many catadioptres of tunable lead-salt diode laser and detector, locking absorbing wavelength and the reference absorption cell of calibrating, adapted and the optical reflector that diaphotoscope, road opposite side are provided with, and the data processing controller that is electrically connected tunable lead-salt diode laser and detector.But, this device exists many deficiencies, at first, the tunable lead-salt diode laser of the output middle infrared wavelength of selecting for use must be in the following ability of low temperature (liquid nitrogen) normal operation as light source and the detector that works in corresponding wave band, this just makes the complex structure of device, volume big, cost and operating cost are all high, especially are unsuitable for open-air real-time monitoring; Secondly, the use of middle-infrared band light source needs to adopt expensive infra-red material, is used as optical elements such as window, diaphotoscope with reference to absorption cell as zinc selenide, and this has equally also increased cost; Once more, the factor of error had both easily been introduced in the use of two cover light sources and detectors, made also that structure is numerous and diverse, cost increases.
Three, summary of the invention
The technical problems to be solved in the utility model provides a kind of vehicle exhaust roadside monitor for overcoming weak point of the prior art.
The technical scheme that is adopted comprises the diode laser on the light path, with reference to absorption cell, detector, road is the optical reflector of side in addition, and and diode laser, the data processing controller that detector is electrically connected, particularly said diode laser is the distributed feed-back diode laser, detector is an indium antimonide detector, be equipped with beam splitter between the mouth of said distributed feed-back diode laser and the input end with reference to absorption cell, light transmitting fiber connects the distributed feed-back diode laser, beam splitter, with reference to absorption cell, the optical fiber head in roadside, road and indium antimonide detector.As the further improvement of technical scheme, described distributed feed-back diode laser is coated with reflectance coating and part reflective semitransparent film respectively for the both ends of the surface perpendicular to the gallium arsenide semiconductor PN junction, and the two ends of said PN junction are electrically connected data processing controller; Described optical fiber head is an emitting head; Described window and beam splitter with reference to absorption cell is quartz glass.
With respect to prior art, because light source and detector all work near infrared band, they do not need cooled with liquid nitrogen, cause its no matter structure, volume, still all greatly reductions of cost, operating cost, and be easy to monitor in real time in the open air; Again because light source is output as near infrared band, common optical material such as quartz glass are used on the window and beam splitter with reference to absorption cell, also provide possibility simultaneously for fibre-optic employing, fibre-optic use had both reduced catadioptre and diaphotoscope, make light path simpler, avoided the interference of ambient light again detector; Owing to, both realized former function, improved the precision of monitoring again, reduced cost again only overlapping under the situation of light source and detector with one.
Four, description of drawings
Fig. 1 is a kind of basic structure scheme drawing of the present utility model.
Five, the specific embodiment
Below in conjunction with accompanying drawing optimal way of the present utility model is described in further detail.
Referring to Fig. 1, data processing controller (9) is electrically connected distributed feed-back diode laser (1) and indium antimonide detector (8) respectively.Be equipped with beam splitter (2) at distributed feed-back diode laser (1) with on reference to the light path between absorption cell (3), optical fiber head (5) and indium antimonide detector (8) place road (6) limit, and road (6) limit that is positioned at optical fiber head (5) opposite is provided with the relative optical reflector of launching with optical fiber head (5) (7) of light; Light transmitting fiber (4) is with distributed feed-back diode laser (1), beam splitter (2), interconnect with reference to the optical fiber head (5) and the indium antimonide detector (8) on absorption cell (3), road (6) limit.
During use, connect the power supply of data processing controller (9), the laser that distributed feed-back diode laser (1) sends behind beam splitter (2), the one tunnel pass with reference to absorption cell (3) to indium antimonide detector (8) to use as rate-aided signal; The optical reflector (7) on another route optical fiber head (5) directive road (6) opposite is again by the indium antimonide detector (8) on its reflected back optical fiber head (5) limit.As long as have automobile to pass through on the road (6), its discharge tail gas will cause the variation of the optical signal that indium antimonide detector (8) is received, and soiling value be handled and be demonstrated at once to data processing controller (9) can according to the signal that indium antimonide detector (8) is received for twice.
Claims (4)
1, a kind of vehicle exhaust roadside monitor, comprise the diode laser on the light path, with reference to absorption cell (3), detector, road (6) is the optical reflector (7) of side in addition, and and diode laser, the data processing controller (9) that detector is electrically connected, it is characterized in that: said diode laser is distributed feed-back diode laser (1), detector is indium antimonide detector (8), be equipped with beam splitter (2) between the mouth of said distributed feed-back diode laser (1) and the input end with reference to absorption cell (3), light transmitting fiber (4) connects distributed feed-back diode laser (1), beam splitter (2), with reference to absorption cell (3), the optical fiber head (5) on road (6) limit and indium antimonide detector (8).
2, monitor according to claim 1, it is characterized in that distributed feed-back diode laser (1) is coated with reflectance coating and part reflective semitransparent film respectively for the both ends of the surface perpendicular to the gallium arsenide semiconductor PN junction, the two ends of said PN junction are electrically connected data processing controller (9).
3, monitor according to claim 1 is characterized in that optical fiber head (5) is an emitting head.
4, monitor according to claim 1 is characterized in that window and the beam splitter (2) with reference to absorption cell (3) is quartz glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01263069 CN2511522Y (en) | 2001-09-28 | 2001-09-28 | Monitor on roadside for automobile exhaust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01263069 CN2511522Y (en) | 2001-09-28 | 2001-09-28 | Monitor on roadside for automobile exhaust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2511522Y true CN2511522Y (en) | 2002-09-18 |
Family
ID=33670716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01263069 Expired - Fee Related CN2511522Y (en) | 2001-09-28 | 2001-09-28 | Monitor on roadside for automobile exhaust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2511522Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100554899C (en) * | 2007-12-07 | 2009-10-28 | 中国科学院安徽光学精密机械研究所 | Lndium antimonide opto-electronic sensor array quiescent operating point auto-calibration device |
| CN106970392A (en) * | 2017-05-31 | 2017-07-21 | 南京先进激光技术研究院 | High sensitivity gaseous contamination detecting laser radar system |
| CN107740718A (en) * | 2017-11-03 | 2018-02-27 | 东北林业大学 | A kind of road car tail gas monitoring device and monitoring method |
-
2001
- 2001-09-28 CN CN 01263069 patent/CN2511522Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100554899C (en) * | 2007-12-07 | 2009-10-28 | 中国科学院安徽光学精密机械研究所 | Lndium antimonide opto-electronic sensor array quiescent operating point auto-calibration device |
| CN106970392A (en) * | 2017-05-31 | 2017-07-21 | 南京先进激光技术研究院 | High sensitivity gaseous contamination detecting laser radar system |
| CN107740718A (en) * | 2017-11-03 | 2018-02-27 | 东北林业大学 | A kind of road car tail gas monitoring device and monitoring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |