CN203534960U - Multi-dimensional laser automatically aligned gas multiple-reflection tank detection device - Google Patents

Abstract

The utility model provides a multi-dimensional laser automatically aligned gas multiple-reflection tank detection device which comprises a laser, a detector, a gas multiple-reflection tank and an internally arranged multi-dimensional adjusting rack, wherein the gas multiple-reflection tank comprises an incident lens and a reflecting lens; the multi-dimensional rack is positioned on the outer side of the incident lens; two collimators are respectively arranged on the multi-dimensional adjusting rack; the laser is connected with the light path of a second collimator; the detector is connected with the light path of a first collimator; the laser output is fed into the gas multiple-reflection tank through the first collimator; after multiple times of reflection and absorption of a sample gas inside the tank, the output light of the gas multiple-reflection tank is fed into the second collimator; the light fed back from the second collimator is output to the detector; the detector converts an optical signal with gas absorption information into an electric signal which is output. The device has the advantages and beneficial effects that the problem that the conventional gas multiple-reflection tank needs a plurality groups of adjusting racks to transmit incident light and outgoing light is solved, the equipment size is reduced, and the operation of the device is simplified.

Description

Multi-dimension laser auto-alignment gas multiple reflecting pool sniffer

Technical field

The utility model relates to sniffer, particularly a kind of multi-dimension laser auto-alignment gas multiple reflecting pool sniffer.

Background technology

Along with developing rapidly of economical activities of mankind and production, in a large amount of consumption energy, also the polluters such as a large amount of industrial gaseous wastees, vehicle exhaust and soot dust granule are entered to atmosphere, cause the pollution of atmosphere.Prevent and remedy pollution, first will understand pollution, where correctly understand pollutant sources in, what composition is, amount has how many, and impact has much, how dark harm have, and only has everything is made carefully, conscientiously, after extensive investigations research, just can make way and the measure of control.Therefore, use gas multiple reflecting pool to monitor in real time ambient atmosphere, can understand and grasp the dynamic of constituent of atomsphere, the effect of playing monitoring and preventing and remedying pollution, significant to the protection of atmospheric environment.

Gas multiple reflecting pool to trace gas concentration testing process is: gas to be measured is passed into gas multiple reflecting pool.The tuning laser that laser instrument is exported certain specific wavelength incides gas multiple reflecting pool after collimating device collimation, in pond through multiple reflections and after the absorption of sample gas, output light is detected device and receives, detector is converted to electric signal by the light signal that carries gas absorption information, and input computing machine carries out subsequent treatment and analysis.

Gas multiple reflecting pool is the important step that gas detects, and due to the limitation of self-technique, traditional gas multiple reflecting pool need to arrange many group adjusting brackets and carry out respectively the transmission of incident light and emergent light, causes equipment volume huge, operates very loaded down with trivial details.

Utility model content

The purpose of this utility model is exactly the above-mentioned defect that will overcome prior art, provides a kind of and can reduce equipment volume, the multi-dimension laser auto-alignment gas multiple reflecting pool sniffer simplifying the operation.

For achieving the above object, the multi-dimension laser auto-alignment gas multiple reflecting pool sniffer that the utility model provides, comprise laser instrument, detector and gas multiple reflecting pool, described gas multiple reflecting pool comprises pond body, in the body of described pond, be provided with incident mirror and catoptron, described gas multiple reflecting pool also comprises built-in multidimensional adjusting bracket and 2 collimating apparatuss, multidimensional adjusting bracket is positioned at the outside of incident mirror, 2 collimating apparatuss are arranged on respectively on multidimensional adjusting bracket, first collimator is arranged in the output light path of described gas multiple reflecting pool, the second collimating apparatus is arranged in the input light path of described gas multiple reflecting pool, described collimating apparatus hard-wired position on multidimensional adjusting bracket is relevant to the position of incident mirror, by following formula, determined:

$x_n=x_0\cos \mathrm{n\θ}+\sqrt{\frac{d}{4f-d}}(x_0+2{\mathrm{fx}}_0^{\′})\sin \mathrm{n\θ},$

cosθ=1-(d/2f)，

In formula, x _nfor collimating apparatus is entering the distance of perforation place apart from incident mirror center, x ₀for entering the distance at perforation centre distance incident mirror center, d is the distance between mirrors of incident mirror and catoptron, and f is the radius-of-curvature of incident mirror and catoptron, and x0 ' is space light incident slope, the reflection angle that θ is space light, and n is order of reflection; While determining first collimator position, in above formula, n is 1; While determining the second collimator position, in above formula, n is order of reflection;

Described incident mirror is provided with into perforation and perforation hole, and described laser instrument is connected with described the second collimating apparatus light path through Transmission Fibers, and detector is connected with first collimator light path through Transmission Fibers;

The tuning laser of described laser instrument output specific wavelength is entered perforation and is injected described gas multiple reflecting pool by described through described the second collimating apparatus, in pond through multiple reflections and after the absorption of sample gas, the output light of described gas multiple reflecting pool is injected described first collimator by described perforation hole, the light that described first collimator is passed back exports described detector to, and described detector is converted to electric signal output by the light signal that carries gas absorption information.

The utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer, wherein said gas multiple reflecting pool is Herriott pond, and place on described incident mirror and described mirror surface opposite, and two spherical mirrors identical by radius-of-curvature form.

The utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer, wherein said detector be connected with computing machine and by output electric signal transmission to computing machine.

Advantage and the good effect of the utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer are: owing to adopting built-in multidimensional adjusting bracket and 2 collimating apparatuss to carry out the improvement of gas multiple reflecting pool, solved traditional gas multiple reflecting pool and need to arrange how group adjusting brackets carry out respectively the transmission problem of incident light and emergent light, reduce equipment volume, simplified the operation of device.

Below in conjunction with embodiment, with reference to accompanying drawing, be elaborated.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer.

Embodiment

Below in conjunction with accompanying drawing, describe the embodiment of the utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer in detail.

According to the selection absorption approach of gas molecule, gas molecule can only absorb the photon of difference of energy that those energy just in time equal its certain two energy level, and the gas of different molecular structures can absorb because of the different energy levels that its different structure determine the photon of different frequency.Gas molecule configurations, the absorption spectrum of gas with various is also different because of molecular structure, and the absorbing state that therefore detects certain special wavelength light can be carried out the qualitative and quantitative analysis of gas.

According to Beer-Lambert law: the monochromatic light that wavelength is λ through the long gas multiple reflecting pool for L after:

I ₍₁₎=I ₍₀₎exp[-α(λ)LC]

Wherein, I (0), I (1) are respectively incident and output intensity, and α (λ) is the absorption coefficient of gas to wavelength X light, and C is gas concentration, that is:

$C=-\frac{1}{\mathrm{\α}\left(\mathrm{\λ}\right)L}\ln \frac{I_{\left(1\right)}}{I_{\left(0\right)}}$

Ideally, if oneself knows the absorption coefficient of wavelength X light, by measuring the light intensity after gas absorption, can obtain the concentration C of gaseous sample to be measured.

With reference to Fig. 1, the utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer comprises laser instrument 11, detector 12, multidimensional adjusting bracket 8 and gas multiple reflecting pool 1.Gas multiple reflecting pool 1 comprises pond body, is provided with incident mirror 2 and catoptron 3 in the body of pond, and incident mirror 2 is provided with into perforation 5 and perforation hole 4.

Gas multiple reflecting pool 1 also comprises built-in multidimensional adjusting bracket 8 and 2 collimating apparatuss 6,7.Multidimensional adjusting bracket 8 is positioned at the outside of incident mirror 2, and 2 collimating apparatuss 6,7 are arranged on respectively on multidimensional adjusting bracket 8, and first collimator 6 is arranged in the output light path of gas multiple reflecting pool 1, and the second collimating apparatus 7 is arranged in the input light path of gas multiple reflecting pool 1.Laser instrument 11 is connected with the second collimating apparatus 7 light paths through Transmission Fibers, and detector 12 is connected with first collimator 6 light paths through Transmission Fibers.

Collimating apparatus 6,7 hard-wired position on multidimensional adjusting bracket 8 is relevant to the position of incident mirror 2, by following formula, is determined:

$x_n=x_0\cos \mathrm{n\θ}+\sqrt{\frac{d}{4f-d}}(x_0+2{\mathrm{fx}}_0^{\′})\sin \mathrm{n\θ}$

cosθ=1-(d/2f)

In formula, x _nfor collimating apparatus is entering the distance of perforation place apart from incident mirror 2 centers, x ₀for entering the distance at perforation centre distance incident mirror 2 centers, d is the distance between mirrors of incident mirror 2 and catoptron 3, and f is the radius-of-curvature of incident mirror 2 and catoptron 3, and x0 ' is space light incident slope, the reflection angle that θ is space light, and n is order of reflection; While determining first collimator 6 position, in above formula, n is 1; While determining the second collimating apparatus 7 position, in above formula, n is order of reflection.

The comparatively simple Herriott of the optical system of gas multiple reflecting pool 1 pond, is comprised of two spherical mirrors.The incident mirror 2 that radius-of-curvature is identical and catoptron 3 are placed face-to-face, form multiple reflections chamber.

The course of work of the utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer is: the tuning laser of laser instrument 11 output specific wavelengths is injected gas multiple reflecting pool 1 through the second collimating apparatus 7 by entering perforation 5, in pond through multiple reflections and after the absorption of sample gas, the output light of gas multiple reflecting pool 1 is injected first collimator 6 by perforation hole 4, the light that first collimator 6 is passed back exports detector 12 to, and detector 12 is converted to electric signal output by the light signal that carries gas absorption information.

In the embodiment of the utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer, detector is connected with computing machine and the electric signal transmission of output to computing machine is carried out to subsequent treatment and analysis.

The utility model multi-dimension laser auto-alignment gas multiple reflecting pool sniffer, has solved traditional gas multiple reflecting pool and need to arrange how group adjusting brackets carry out respectively the transmission problem of incident light and emergent light, has reduced equipment volume, has simplified the operation of device.

Embodiment recited above is described preferred implementation of the present utility model, not design of the present utility model and scope is limited.Do not departing under the prerequisite of the utility model design concept; various modification and improvement that this area ordinary person makes the technical solution of the utility model; all should drop into protection domain of the present utility model; the technology contents that the utility model is asked for protection, is all documented in claims.。

Claims (3)

1. a multi-dimension laser auto-alignment gas multiple reflecting pool sniffer, comprise laser instrument (11), detector (12) and gas multiple reflecting pool (1), described gas multiple reflecting pool (1) comprises pond body, in the body of described pond, be provided with incident mirror (2) and catoptron (3), it is characterized in that: described gas multiple reflecting pool (1) also comprises built-in multidimensional adjusting bracket (8) and 2 collimating apparatuss (6, 7), described multidimensional adjusting bracket (8) is positioned at the outside of described incident mirror (2), 2 described collimating apparatuss (6, 7) be arranged on respectively on described multidimensional adjusting bracket (8), first collimator (6) is arranged in the output light path of described gas multiple reflecting pool (1), the second collimating apparatus (7) is arranged in the input light path of described gas multiple reflecting pool (1), described collimating apparatus (6, 7) relevant to the position of incident mirror (2) in the upper hard-wired position of multidimensional adjusting bracket (8), by following formula, determined:

$x_0=x_0\cos \mathrm{n\θ}+\sqrt{\frac{d}{4f-d}}(x_0+2{\mathrm{fx}}_0^{\′})\sin \mathrm{n\θ},$

cosθ=1-(d/2f)，

In formula, x _nfor collimating apparatus is entering the distance of perforation place apart from incident mirror (2) center, x ₀for entering the distance at perforation centre distance incident mirror 2 centers, d is the distance between mirrors of incident mirror (2) and catoptron (3), and f is the radius-of-curvature of incident mirror (2) and catoptron (3), x ₀' be space light incident slope, the reflection angle that θ is space light, n is order of reflection; While determining the second collimating apparatus (7) position, in above formula, n is 1; While determining first collimator (6) position, in above formula, n is order of reflection;

Described incident mirror (2) is provided with into perforation (5) and perforation hole (4), and described laser instrument (11) is connected with described the second collimating apparatus (7) light path through Transmission Fibers, and described detector (12) is connected with described first collimator (6) light path through Transmission Fibers; The tuning laser of described laser instrument (11) output specific wavelength is entered perforation (5) and is injected described gas multiple reflecting pool (1) by described through described the second collimating apparatus (7), in pond through multiple reflections and after the absorption of sample gas, the output light of described gas multiple reflecting pool (1) is injected described first collimator (6) by described perforation hole (4), the light that described first collimator (6) is passed back exports described detector (12) to, and described detector (12) is converted to electric signal output by the light signal that carries gas absorption information.

2. multi-dimension laser auto-alignment gas multiple reflecting pool sniffer according to claim 1, it is characterized in that: wherein said gas multiple reflecting pool (1) is Herriott pond, described incident mirror (2) is placed face-to-face with described catoptron (3), and two spherical mirrors identical by radius-of-curvature form.

3. multi-dimension laser auto-alignment gas multiple reflecting pool sniffer according to claim 1 and 2, is characterized in that: wherein said detector (12) be connected with computing machine and by the electric signal transmission of output to described computing machine.

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