CN106092964A - A kind of portable gas detector based on tunable semiconductor laser - Google Patents
A kind of portable gas detector based on tunable semiconductor laser Download PDFInfo
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- CN106092964A CN106092964A CN201610424887.6A CN201610424887A CN106092964A CN 106092964 A CN106092964 A CN 106092964A CN 201610424887 A CN201610424887 A CN 201610424887A CN 106092964 A CN106092964 A CN 106092964A
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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
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- General Health & Medical Sciences (AREA)
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- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a kind of portable gas detector based on tunable semiconductor laser, including body, processor, TDLAS laser generator, lens, optical-electrical converter, indicator；The inside of described body is located at by described processor and described optical-electrical converter, and the transmitting terminal of described TDLAS laser generator, the receiving terminal of described lens and described indicator are all located at the outside of described body；Described processor is connected with described TDLAS laser generator；The other end contrary with the receiving terminal of described lens be located at by described optical-electrical converter；Described processor is also connected with described optical-electrical converter；Described processor is also connected with described indicator.Present configuration is clear and definite, simple to operate；It is capable of contactless gas detecting, and can detect in high temperature, the high environment radiated；The more important thing is that its detection response time, < 1 second, detection method can realize remote measurement, and ultimate range is up to 100 meters.
Description
Technical field
The present invention relates to detection field, particularly relate to poisonous, harmful, the detection field of damp, be specifically related to one
Plant portable gas detector based on tunable semiconductor laser.
Background technology
Gas detector, is the instrument and meter instrument of a kind of gas leakage Concentration Testing, is primarily referred to as Portable gas health check-up
Survey instrument.At present, traditional portable gas detector, use electrochemistry, catalysis burning, PID, the principle of quasiconductor
Realize gas detecting, and this detection technique is required for sensor and directly contacts detected gas, therefore, work as detector
The when of warning, personnel often already in dangerous environment, and, some occasion is also unsuitable for personnel with gas detecting
Instrument enters and directly detects.Additionally, the detection speed of traditional portable gas detector is generally all at tens seconds, reaction is slow
Slowly.
The spectral absorption of molecule, refers to, when the light quantum of molecule absorption one capability, to jump from lower level ground state
Adjourning higher energy level, absorbed energy must be the most equal with the energy difference before and after molecular transition, otherwise can not be absorbed.By
Different in each material molecular structure, the light quantum of different abilities can selectively be absorbed, generally speaking, content of material is more
Many, absorb the most, based on this characteristic, material can be carried out the detection of qualitative, quantitative.
Semiconductor laser with tunable (TDLAS), has the characteristic that narrow linewidth and wavelength change with injection current, therefore,
Can realize the single of molecule or several measure apart from the most indistinguishable close Absorption Line.Additionally, TDLAS is due to its line
Width is the narrowest, can be effectively prevented the interference closing on absorption spectra gas, therefore has quite excellent selectivity.
Summary of the invention
The many drawbacks existed in actual use based on traditional portable gas detector, the invention provides
A kind of portable gas detector based on tunable semiconductor laser, structure is clear and definite, simple to operate；It is capable of contactless
Gas detecting so that staff is away from dangerous rugged environment, and can high temperature, high radiation environment in detect；
The more important thing is described portable gas detector based on tunable semiconductor laser the detection response time < 1 second, detection
Method can realize remote measurement, and ultimate range is up to 100 meters.
The technical scheme is that a kind of portable gas detector based on tunable semiconductor laser, including machine
Body, processor, TDLAS laser generator, lens, optical-electrical converter, indicator；Described processor and described optical-electrical converter set
In the inside of described body, the transmitting terminal of described TDLAS laser generator, the receiving terminal of described lens and described indicator are equal
It is located at the outside of described body；Described processor is connected with described TDLAS laser generator, is used for controlling described TDLAS laser
Generator；The other end contrary with the receiving terminal of described lens be located at by described optical-electrical converter, for accepting through described lens
Laser signal and described laser signal is converted into the signal of telecommunication；Described processor is also connected with described optical-electrical converter, is used for
Process the described signal of telecommunication and obtain result；Described processor is also connected with described indicator, is indicated by described indicator
Described result.
In one embodiment of the invention, described indicator is a display, indicates described process by character image
The result that device obtains.Or, described indicator is a siren, and the process indicating described processor to obtain by sound is tied
Really.
In another embodiment, described optical-electrical converter is a kind of indium gallium arsenic photocell.
Wherein in an embodiment, described portable gas detector based on tunable semiconductor laser also includes
One reflecting mirror, it is located at the other side of gas leakage, i.e. gas leakage at described reflecting mirror with described when reality is applied
Between the transmitting terminal of TDLAS laser generator or the receiving terminal of described lens.
The technical scheme that the present invention provides, it is possible to realize contactless gas detecting, so that staff is away from danger
Danger rugged environment, owing to being non-contacting detection, the such as high temperature that is particularly suited for cannot realizing at some traditional sensors,
In the environment of high radiation, it is often more important that the detection reaction of described portable gas detector based on tunable semiconductor laser
Time, < 1 second, detection method can realize remote measurement, and ultimate range is up to 100 meters.
In addition, relative and fixed laser gas detecting instrument, only cover specific model owing to its position is fixing
Enclose, and portable gas detector is easy to carry due to it, the leakage of the highly beneficial conveyance conduit detecting some distance
Detection, owing to being non-contacting, the response time of gas detecting based on tunable semiconductor laser, can be very at Millisecond
Fast inswept certain area.
Accompanying drawing explanation
Fig. 1 is the structural perspective of one embodiment of the present of invention；
Fig. 2 is the application drawing of one embodiment of the present of invention.
Detailed description of the invention
The invention provides a kind of portable gas detector based on tunable semiconductor laser, including body 1, process
Device 2, TDLAS laser generator 3, lens 4, optical-electrical converter 5, indicator 6；Described processor 2 and described optical-electrical converter 5 set
In the inside of described body 1, the transmitting terminal of described TDLAS laser generator 3, the receiving terminal of described lens 4 and described instruction
The outside of described body is all located at by device 6；Described processor 2 is connected with described TDLAS laser generator 3, is used for controlling described
TDLAS laser generator 3；The other end contrary with the receiving terminal of described lens 4 be located at by described optical-electrical converter 5, is used for accepting
Through the laser signal of described lens 4 and described laser signal is converted into the signal of telecommunication；Described processor 2 also turns with described photoelectricity
Parallel operation 5 connects, and is used for processing the described signal of telecommunication and obtaining result；Described processor 2 is also connected with described indicator 6, logical
Cross described indicator 6 and indicate described result.
In one embodiment of the invention, the invention provides a kind of Portable gas based on tunable semiconductor laser
Body detector, including body 1, processor 2, TDLAS laser generator 3, lens 4, optical-electrical converter 5, indicator 6；Described place
The inside of described body 1 is located at by reason device 2 and described optical-electrical converter 5, the transmitting terminal of described TDLAS laser generator 3, described
The receiving terminal of mirror 4 and described indicator 6 are all located at the outside of described body；Described processor 2 occurs with described TDLAS laser
Device 3 connects, and is used for controlling described TDLAS laser generator 3；Described optical-electrical converter 5 is located at and the receiving terminal phase of described lens 4
The anti-other end, for accepting the laser signal through described lens 4 and described laser signal being converted into the signal of telecommunication；Described place
Reason device 2 is also connected with described optical-electrical converter 5, is used for processing the described signal of telecommunication and obtaining result；Described processor 2 also with
Described indicator 6 connects, and indicates described result by described indicator 6；Described indicator 6 is a display, by literary composition
Word image indicates the result that described processor 2 obtains, or, described instruction, 6 is a siren, indicates institute by sound
State the result that processor 2 obtains.
In another embodiment, the invention provides a kind of Portable gas health check-up based on tunable semiconductor laser
Survey instrument, including body 1, processor 2, TDLAS laser generator 3, lens 4, optical-electrical converter 5, indicator 6；Described processor 2
With the inside that described body 1 is located at by described optical-electrical converter 5, the transmitting terminal of described TDLAS laser generator 3, described lens 4
Receiving terminal and described indicator 6 are all located at the outside of described body；Described processor 2 is with described TDLAS laser generator 3 even
Connect, be used for controlling described TDLAS laser generator 3；Described optical-electrical converter 5 is located at contrary with the receiving terminal of described lens 4
The other end, for accepting the laser signal through described lens 4 and described laser signal being converted into the signal of telecommunication；Described processor
2 are also connected with described optical-electrical converter 5, are used for processing the described signal of telecommunication and obtaining result；Described processor 2 is also with described
Indicator 6 connects, and indicates described result by described indicator 6；Described optical-electrical converter 5 is a kind of indium gallium arsenic photoelectricity
Pipe.
Wherein in an embodiment, the invention provides a kind of Portable gas health check-up based on tunable semiconductor laser
Survey instrument, including body 1, processor 2, TDLAS laser generator 3, lens 4, optical-electrical converter 5, indicator 6；Described processor 2
With the inside that described body 1 is located at by described optical-electrical converter 5, the transmitting terminal of described TDLAS laser generator 3, described lens 4
Receiving terminal and described indicator 6 are all located at the outside of described body；Described processor 2 is with described TDLAS laser generator 3 even
Connect, be used for controlling described TDLAS laser generator 3；Described optical-electrical converter 5 is located at contrary with the receiving terminal of described lens 4
The other end, for accepting the laser signal through described lens 4 and described laser signal being converted into the signal of telecommunication；Described processor
2 are also connected with described optical-electrical converter 5, are used for processing the described signal of telecommunication and obtaining result；Described processor 2 is also with described
Indicator 6 connects, and indicates described result by described indicator 6；Described is based on tunable semiconductor laser portable
Formula gas detector also includes a reflecting mirror, and it is located at the other side of gas leakage when reality is applied, i.e. gas leakage exists
Between described reflecting mirror and the transmitting terminal of described TDLAS laser generator 3 or the receiving terminal of described lens 4
In actual use, the zigzag scanning signal that the TDLAS laser generator 3 of specific wavelength is produced by processor 2 drives
Dynamic, iraser passes detected gas, arrives the surface of emission 7, reflecting surface 7 both can be special reflecting mirror can also be common
Light body of wall, tank body or pipeline；Lens 4 amplify, for collecting, the laser signal reflected, and optical-electrical converter 5 will accept
To laser signal be converted into the signal of telecommunication, general opto-electronic conversion uses indium gallium arsenic photocell；The signal received is entered by processor 2
Digitized Filtering Processing is analyzed, and when there being the gas of leakage in laser path, iraser will be absorbed, by detection laser
Absorbtivity just can calculate the concentration of gas leakage, indicates the concentration of gas finally by indicator 6.
Specifically, processor 2, produce the current signal controlling laser instrument, make the wavelength of laser come in a little scope
Flyback retrace, the absorption spectra of detected gas molecule needs in the range of this scanning wavelength, and iraser passes through detected
Region, in the case of not there is detected gas leakage, laser will not be absorbed, and when there is gas leakage, laser is early swept
Retouching at gas leakage absworption peak, laser will be absorbed, and processor 2 can detect the dense of specific gas according to the amount absorbed
Degree.
Being described in detail the specific embodiment of the present invention above, but it is only used as example, the present invention is not limiting as
In particular embodiments described above.To those skilled in the art, any equivalent modifications that this practicality is carried out and replacing
In generation, is the most all among scope of the invention.Therefore, the equalization made without departing from the spirit and scope of the invention converts and repaiies
Change, all should contain within the scope of the invention.
Claims (5)
1. a portable gas detector based on tunable semiconductor laser, it is characterised in that include body, processor,
TDLAS laser generator, lens, optical-electrical converter, indicator；Described body is located at by described processor and described optical-electrical converter
Inside, the transmitting terminal of described TDLAS laser generator, the receiving terminal of described lens and described indicator are all located at described machine
The outside of body；Described processor is connected with described TDLAS laser generator, is used for controlling described TDLAS laser generator；Described
The other end contrary with the receiving terminal of described lens be located at by optical-electrical converter, for accepting the laser signal through described lens also
Described laser signal is converted into the signal of telecommunication；Described processor is also connected with described optical-electrical converter, is used for processing described telecommunications
Number and obtain result；Described processor is also connected with described indicator, indicates described result by described indicator.
Portable gas detector based on tunable semiconductor laser the most according to claim 1, it is characterised in that institute
Stating indicator can be display or siren, is indicated by character image or sound respectively.
Portable gas detector based on tunable semiconductor laser the most according to claim 1, it is characterised in that institute
State optical-electrical converter for a kind of indium gallium arsenic photocell.
Portable gas detector based on tunable semiconductor laser the most according to claim 1, it is characterised in that also
Including a reflecting mirror.
Portable gas detector based on tunable semiconductor laser the most according to claim 4, it is characterised in that let out
Gas leakage body is between the receiving terminal of described reflecting mirror and the transmitting terminal of TDLAS laser generator 3 or lens 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424887.6A CN106092964A (en) | 2016-06-16 | 2016-06-16 | A kind of portable gas detector based on tunable semiconductor laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610424887.6A CN106092964A (en) | 2016-06-16 | 2016-06-16 | A kind of portable gas detector based on tunable semiconductor laser |
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| Publication Number | Publication Date |
|---|---|
| CN106092964A true CN106092964A (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610424887.6A Pending CN106092964A (en) | 2016-06-16 | 2016-06-16 | A kind of portable gas detector based on tunable semiconductor laser |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411922A (en) * | 2013-07-26 | 2013-11-27 | 成都谱视科技有限公司 | Handheld gas sensing system based on optical remote measuring lens |
| CN205120584U (en) * | 2015-11-04 | 2016-03-30 | 安徽中科智泰光电测控科技有限公司 | Pipeline ammonia escape laser absorption spectrum automatic on -line normal position measuring device |
| CN105510274A (en) * | 2015-11-30 | 2016-04-20 | 中国科学院光电研究院 | Airborne laser active remote measurement system for concentration of atmospheric CO2 column |
| CN105531580A (en) * | 2014-05-30 | 2016-04-27 | 富士电机株式会社 | Multicomponent laser gas analyzer |
| CN205719963U (en) * | 2016-06-16 | 2016-11-23 | 上海莱帝科技有限公司 | A kind of portable gas detector based on tunable semiconductor laser |
-
2016
- 2016-06-16 CN CN201610424887.6A patent/CN106092964A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411922A (en) * | 2013-07-26 | 2013-11-27 | 成都谱视科技有限公司 | Handheld gas sensing system based on optical remote measuring lens |
| CN105531580A (en) * | 2014-05-30 | 2016-04-27 | 富士电机株式会社 | Multicomponent laser gas analyzer |
| CN205120584U (en) * | 2015-11-04 | 2016-03-30 | 安徽中科智泰光电测控科技有限公司 | Pipeline ammonia escape laser absorption spectrum automatic on -line normal position measuring device |
| CN105510274A (en) * | 2015-11-30 | 2016-04-20 | 中国科学院光电研究院 | Airborne laser active remote measurement system for concentration of atmospheric CO2 column |
| CN205719963U (en) * | 2016-06-16 | 2016-11-23 | 上海莱帝科技有限公司 | A kind of portable gas detector based on tunable semiconductor laser |
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Application publication date: 20161109 |
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