CN102012357B - Bypass concentration calibration system with variable light path - Google Patents
Bypass concentration calibration system with variable light path Download PDFInfo
- Publication number
- CN102012357B CN102012357B CN 200910195224 CN200910195224A CN102012357B CN 102012357 B CN102012357 B CN 102012357B CN 200910195224 CN200910195224 CN 200910195224 CN 200910195224 A CN200910195224 A CN 200910195224A CN 102012357 B CN102012357 B CN 102012357B
- Authority
- CN
- China
- Prior art keywords
- light path
- concentration calibration
- bypass
- calibration system
- sample cell
- 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
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Measuring Cells (AREA)
Abstract
The invention relates to a bypass concentration calibration system with a variable light path, belonging to the technical field of environmental optical measurement. The bypass concentration calibration system comprises a main transmitting light path unit and a main receiving light path unit, and a partition with through holes is arranged between the two units. In the invention, a bypass optical system is introduced, a light path space is increased, and sample cells with different lengths can be replaced during concentration calibration so as to obtain light paths with different lengths. Even if a standard gas with one concentration is used, different equivalent concentrations can be obtained to realize multi-concentration calibration because the lengths of the sample cells are different. The invention has the function of changing the length of the sample cell so as to realize light path change, and meanwhile, since a calibrated light path is independent of a measured light path, when an instrument is calibrated, the accuracy of the main light path is not influenced, and therefore, the operability and the flexibility of the instrument are increased, multiple equivalent concentrations can be obtained by using the standard gas with one concentration, and the operation cost of the instrument can be saved.
Description
Technical field
The invention belongs to the environmental optics field of measuring technique, be specifically related to a kind of bypass concentration calibration system of variable light path, be used for long-range differential optical system is carried out the calibration of different equivalent concentration.
Background technology
Long-range difference absorption spectrum gaseous contamination monitoring device is a kind of main atmosphere environment supervision instrument; Its measuring principle is to utilize the ultraviolet-visible absorbance of gas to optical radiation; The primary structure of instrument is one to transmit and receive telescopic system, beam splitting system and the data handling system of one; Instrument work is regularly to carry out the concentration calibration as requested, and calibration steps is to let certain density calibrating gas through the calibration sample pond of instrument instrument demarcated.Present employed instrument, its calibration system all are the sample cells of on main optical path, placing a regular length, and precision prescribed is higher when regulating owing to main optical path; Therefore, in case system debug installs, just can not change light path again; That is to say; The light path of concentration calibration can't change, if variable concentrations is calibrated, must use the calibrating gas of variable concentrations.When carrying out the concentration calibration, need to change the gas of variable concentrations, increased workload on the one hand, increased instrument operating cost on the other hand.There is following deficiency in the concentration calibration system of prior art: increased the debugging difficulty and the maintenance cost of instrument, simultaneously the user of service has also been had higher technical requirement.
Summary of the invention
The object of the invention is to overcome not enough place of the prior art and comparatively convenient and the concentration of variable light path bypass cheaply calibration system is provided.
The invention discloses a kind of bypass concentration calibration system of variable light path; Comprise the main optical path unit 1 that transmits and receives; The bypass concentration calibration system 2 that it comprises light source 11, plane mirror 12, spherical reflector 14 and is adjacent; It comprises cylinder reflecting prism 24, the sample cell 26 on plane mirror 21, the quartzy convex lens 22 of ultraviolet, 23,45 ° of inclined-planes of optics shutter, and the dividing plate 3 with light hole, and it comprises perforate 31 and 32.
Key of the present invention is to have introduced the bypass optical system, has increased optical path space, when therefore carrying out the concentration calibration; Can change the sample cell of different length; Thereby obtain the light path of different length, even use a kind of calibrating gas of concentration, because the length of sample cell is different; Also can access different EPCs, realize many concentration calibrations.
Thereby having, the bypass concentration calibration system of variable light path of the present invention can change the function that sample cell length realizes changing light path; Calibrate light path simultaneously and be independent of the measurement light path; When instrument is carried out calibration operation, can not exert an influence to the precision of main optical path, improved the operability and the dirigibility of instrument; Owing to use a kind of calibrating gas of concentration can obtain multiple EPC, the operating cost that therefore can practice thrift instrument.
Particularly; The principal feature of the bypass concentration calibration system of variable light path of the present invention is to have designed a bypass on the main optical path side; Secondary mirror in the main optical path is designed to become 45 degree with primary optical axis, light is incorporated into bypass measures in the light path, arrive the light path receiving system through sample cell.When instrument is normally measured, be full of clean air or nitrogen in the sample cell.
Another characteristics of the present invention are to introduce another calibration beam from main optical path to get into bypath system, and a rotary optics shutter is set, when system need carry out the concentration calibration; The optics shutter is rotated 90 degree, block the measurement light path, and let calibration beam pass through sample cell; Feed normal concentration gas to sample cell and can carry out the concentration calibration; Conversion calibration concentration only needs to change the sample cell of different length if desired, thereby realizes the change of light path.Change sample cell for ease, the air intake opening of sample cell and gas outlet interface all easy to use.Therefore, concentration calibrating installation of the present invention only need use a kind of normal concentration gas, can carry out the calibration of different equivalent concentration.
The bypass calibration light path of the bypass concentration calibration system of this variable light path is relatively independent of the main light path of measuring, and therefore when carrying out the concentration calibration and changing sample cell, can not produce any influence to main optical path, has reduced the maintenance workload of instrument.
The bypass concentration calibration system advantage of variable light path of the present invention has:
Work independence is higher, and with respect to the instrument of prior art, the present invention has introduced the bypass optical system, has increased the optical path space of instrument, therefore can fixing in the past sample cell be designed to adjustable length sample cell, realizes changing the purpose of light path.The present invention is easy to operate, and only the calibrating gas of a kind of concentration of need can be realized the calibration of different equivalent concentration, has improved the utilization factor of calibrating gas, has reduced the use cost of instrument.And former instrument because optical path space is limited, and to the requirement of stability of layout, can not be changed the sample cell of different length when carrying out the concentration calibration.
Description of drawings
Fig. 1 is a kind of basic structure synoptic diagram of the present invention,
Wherein, l main transmits and receives optical path unit 1,2nd, the bypass concentration calibration system that is adjacent, and the 3rd, dividing plate was opened 1 and 2 minute, avoided their phase mutual interference;
Dotted line is a light path among the figure;
The 11st, light source, the 12nd, become the plane mirror of miter angle with primary optical axis, 13 dotted lines are main optical paths, the 14th, spherical reflector; The 21st, plane mirror, the 22nd, the quartzy convex lens of ultraviolet, the 23rd, the optics shutter, 24 is the cylinder reflecting prisms on 45 degree inclined-planes, the 25th, the import of sample cell appearance gas, the 26th, sample cell, the 27th, the outlet of sample cell appearance gas; 31 and 32 is the perforates above the dividing plate 3.
For the ease of understanding, below will describe in detail of the present invention through concrete accompanying drawing and embodiment.What need particularly point out is; Instantiation and accompanying drawing only are in order to explain; Obviously those of ordinary skill in the art can explain according to this paper, within the scope of the invention the present invention is made various corrections and change, and these corrections and change are also included in the scope of the present invention.
Embodiment
Further describe below in conjunction with 1 pair of working method of the present invention of accompanying drawing.
Referring to Fig. 1, the main optical path of surveying instrument is made up of light source 11, catoptron 12 and spherical mirror 14; Bypass concentration calibrating installation is by compositions such as catoptron 21,24, quartzy convex lens 22, optics shutter 23, sample cells 26.
During the surveying instrument operate as normal; It is measured light and gets into bypath system through the perforate on the dividing plate 3 32; At this moment the optics shutter 23 in the bypath system is in vertical position, and light passes through sample cell 26 and gets into the light path receiving systems after reflecting through catoptron 24; When normally measuring, in the sample cell cleaned air or nitrogen.
In the time of need carrying out the concentration calibration, optics shutter 23 clockwise rotates 90 degree, is horizontal; Block the light that gets into through perforate 32, at this moment, the light that light source 11 sends directly gets into bypath system through the perforate on the dividing plate 3 31; Through catoptron 21 reflection, quartzy convex lens 22 converge, and get into sample cell after passing through the center pit of catoptron 24; Arrive the light path receiving system at last, during calibration, feed normal concentration gas in the sample cell.When needs carry out the calibration of different equivalent concentration, only need to change the sample cell of different length, the concentration that need not to change calibrating gas can realize, has practiced thrift the use amount of calibrating gas.
Claims (6)
1. the bypass concentration calibration system of a variable light path; It is characterized in that; Comprise that the master who is made up of light source (11), plane mirror one (12), spherical reflector (14) transmits and receives optical path unit (1) and adjacent by plane mirror two (21), the quartzy convex lens (22) of ultraviolet, optics shutter (23), the cylinder reflecting prism (24) on 45 ° of inclined-planes, sample cell appearance gas import (25); Sample cell (26); The bypass concentration calibration system (2) that sample cell appearance gas outlet (27) constitutes, and dividing plate (3), dividing plate perforate one (31) and dividing plate perforate two (32); Described master transmits and receives optical path unit (1) and adjacent bypass concentration calibration system (2), is separated by a dividing plate (3) with light hole between them; The master who is made up of light source (11), spherical reflector (14) and plane mirror one (12) transmits and receives ultraviolet-visible light that optical path unit (1) will pass through the atmospheric pollution gas absorption reflexes to 45 ° of inclined-planes in the adjacent bypass concentration calibration system through dividing plate perforate two (32) cylinder reflecting prism (24); When carrying out the concentration calibration; Optics shutter (23) turns to horizontal level; The light that light source (11) sends is through dividing plate perforate one (31); Through plane mirror two (21), the ultraviolet quartz converges convex lens (22), and the cylinder reflecting prism (24) on 45 ° of inclined-planes, sample cell (26) back get into measuring system.
2. the bypass concentration calibration system of variable light path according to claim 1 is characterized in that, the light that light source (11) sends gets into bypass concentration calibration system from the side.
3. the bypass concentration calibration system of variable light path according to claim 1; It is characterized in that; The cylinder reflecting prism (24) on 45 degree inclined-planes is center drillings; Can the vertical incidence light from plane mirror one (12) reflection be reflected 90 °, let the horizon light that reflects back from plane mirror two (21) pass simultaneously.
4. the bypass concentration calibration system of variable light path according to claim 1 is characterized in that, can change the sample cell (26) of different length as required, realizes the concentration calibration of variable light path.
5. the bypass concentration calibration system of variable light path according to claim 1 is characterized in that, the concentration calibration device when changing the sample cell (26) of demands of different, does not influence the main optical path of measuring main emission and accepting optical path unit (1) in the side of light path.
6. according to the bypass concentration calibration system of the described variable light path of claim 1, it is characterized in that optics shutter (23) can carry out 90 ° of rotations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910195224 CN102012357B (en) | 2009-09-07 | 2009-09-07 | Bypass concentration calibration system with variable light path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910195224 CN102012357B (en) | 2009-09-07 | 2009-09-07 | Bypass concentration calibration system with variable light path |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102012357A CN102012357A (en) | 2011-04-13 |
| CN102012357B true CN102012357B (en) | 2012-12-12 |
Family
ID=43842602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910195224 Expired - Fee Related CN102012357B (en) | 2009-09-07 | 2009-09-07 | Bypass concentration calibration system with variable light path |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102012357B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353634B (en) * | 2011-06-15 | 2013-05-01 | 西安毅达信息***有限公司 | Online calibration method of laser online detection system for direction of gas contents in smoke |
| CN103969190B (en) * | 2014-05-07 | 2016-05-18 | 长春理工大学 | A kind of self-checking device of laser type pacity smokemeter |
| CN104677880A (en) * | 2015-03-25 | 2015-06-03 | 武汉四方光电科技有限公司 | Laser Raman gas analysis system and real-time differential background noise removal measurement method |
| EP3586123B1 (en) * | 2017-02-21 | 2023-03-08 | Cytiva Sweden AB | Methods and systems for adapting pathlength and/or wavelength of a uv-absorbance cell in a chromatography system |
| CN107748142A (en) * | 2017-09-30 | 2018-03-02 | 南京南瑞集团公司 | A kind of dual-beam based on miniature beam-splitting optical system becomes light path sample spectra analytical equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861809A (en) * | 1973-04-06 | 1975-01-21 | Perkin Elmer Corp | Confocal cavity optical gas sensor |
| EP0322611A3 (en) * | 1987-12-31 | 1990-07-25 | AUTOMATIK Apparate-Maschinenbau GmbH | Apparatus and method for spectrophotometric analysis of a material in a moving process stream |
| CN1070266A (en) * | 1992-08-03 | 1993-03-24 | 上海科学技术实业总公司 | Double-beam compensating turbidimeter |
| CA2080114A1 (en) * | 1991-10-08 | 1993-04-09 | Robert A. Hoult | Optical transmittance apparatus for fluids |
| CA2328609A1 (en) * | 1998-05-16 | 1999-11-25 | Pe Corporation (Ny) | Instrument for monitoring polymerase chain reaction of dna |
| CN201262612Y (en) * | 2008-08-27 | 2009-06-24 | 索纪文 | Ultra stability infrared gas analyzer |
-
2009
- 2009-09-07 CN CN 200910195224 patent/CN102012357B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861809A (en) * | 1973-04-06 | 1975-01-21 | Perkin Elmer Corp | Confocal cavity optical gas sensor |
| EP0322611A3 (en) * | 1987-12-31 | 1990-07-25 | AUTOMATIK Apparate-Maschinenbau GmbH | Apparatus and method for spectrophotometric analysis of a material in a moving process stream |
| CA2080114A1 (en) * | 1991-10-08 | 1993-04-09 | Robert A. Hoult | Optical transmittance apparatus for fluids |
| CN1070266A (en) * | 1992-08-03 | 1993-03-24 | 上海科学技术实业总公司 | Double-beam compensating turbidimeter |
| CA2328609A1 (en) * | 1998-05-16 | 1999-11-25 | Pe Corporation (Ny) | Instrument for monitoring polymerase chain reaction of dna |
| CN201262612Y (en) * | 2008-08-27 | 2009-06-24 | 索纪文 | Ultra stability infrared gas analyzer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102012357A (en) | 2011-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102012357B (en) | Bypass concentration calibration system with variable light path | |
| CN101226143B (en) | Long optical path air monitoring instrument | |
| CN205593914U (en) | Portable gaseous pollutants concentration detection device | |
| CN107144543B (en) | Receiving and transmitting integrated open light path atmosphere detection system | |
| US10180393B2 (en) | Sample cell | |
| CN205317651U (en) | Portable long path cell | |
| CN102495010B (en) | High sensitivity optical system of DOAS analyzer | |
| CN113029336B (en) | Space remote sensing instrument on-satellite radiometric calibration device and calibration method | |
| CN104697947A (en) | Co-optical-axis transmitting-receiving integrated type long-optical-path laser detection system | |
| CN103308282A (en) | Efficient measuring system and method for transmittance of reflecting telescoping system | |
| CN102854149A (en) | Measuring apparatus for continuous spectrum bidirectional scattering distribution function | |
| CN100529736C (en) | Zero calibration method for BRDF measuring system | |
| CN101634626B (en) | Active-passive integrated atmospheric pollution measuring system and measuring method thereof | |
| CN101158637A (en) | Sample pool used for on-line proving of monitoring instrument | |
| CN104155243A (en) | Optical gas chamber and method for calculating total optical distance by gas chamber | |
| CN102566318B (en) | Light beam transmission stabilizing device | |
| CN109342348A (en) | A kind of binary channels infrared gas sensor | |
| CN102519594B (en) | Measuring system and method for large-caliber parallel light beam spectral irradiance | |
| CN102788763A (en) | Difference absorption spectrum atmospheric monitoring system with laser induced breakdown spectrum serving as light source | |
| CN106290173B (en) | Device and method for detecting multidimensional distribution of gas concentration | |
| CN202583062U (en) | Measurement system provided with optical fibre structure and adopting differential optical absorption spectroscopy for pollution gas | |
| CN102778440A (en) | Total-reflection type optical system of flue gas concentration analyzer | |
| CN202230015U (en) | Air monitoring instrument capable of reflecting long optical path | |
| CN105005037A (en) | Aerosol online monitoring laser radar based on embedded system | |
| CN209182234U (en) | A kind of binary channels infrared gas sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20150907 |
|
| EXPY | Termination of patent right or utility model |