CN209231211U - A kind of self-calibrating gas telemetering equipment - Google Patents
A kind of self-calibrating gas telemetering equipment Download PDFInfo
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- CN209231211U CN209231211U CN201821505040.1U CN201821505040U CN209231211U CN 209231211 U CN209231211 U CN 209231211U CN 201821505040 U CN201821505040 U CN 201821505040U CN 209231211 U CN209231211 U CN 209231211U
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- laser
- gas
- data collecting
- collecting card
- concentration
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Abstract
The utility model discloses a kind of self-calibrating gas telemetering equipments, the fiber optic splitter that the laser of laser transmitting first passes around 1:1 is divided into two bundles the identical laser of energy, it is a branch of to enter multiple reflecting pool after optical fiber collimator, by being received by a photoelectric detector after multiple reflections from multiple reflecting pool injection, it is re-fed into data collecting card, then handles and analyzes by data collecting card and obtain the concentration of calibrating gas；Another beam of laser is emitted in the atmosphere of outfield after optical fiber collimator, laser is after the reflection of corner reflector, it is received by telescope, laser successively passes through convex lens, optical filter and convex lens and finally converges on photodetector, it is re-fed into data collecting card, the concentration of surveyed gas in the atmosphere of outfield is equally obtained by data collecting card.The utility model has the beneficial effects that can be realized simultaneously the measurement and calibration of gas concentration, whether accurate, to significantly reduce the error of measurement result if being assured that measurement result during measurement gas concentration at the scene.
Description
Technical field
The utility model belongs to gas measurement technique field, and being related to one kind may be implemented self-alignment gas remote measurement device.
Background technique
Spectral technique as emerging technology fast-developing in recent years, may be implemented it is non-contact it is online, a wide range of, mostly at
Divide, the work of continuous rapid survey, becomes the developing direction and technology mainstream of atmosphere environment supervision technology.The utility model is base
It realizes in tunable diode laser absorption spectroscopy (TDLAS) technology to gas remote measurement in atmosphere.TDLAS technology is to pass
System infrared spectrum technology develops, and basic principle is that gas is utilized to absorb the spectrum generated after outside energy, to gas
Absorption spectrum analyze the concentration information of available gas.There was only a measurement road in traditional gas remote measurement device
Diameter, the measurement and calibration of system, which must separate, individually to be carried out, and existing technical solution cannot achieve self-calibration measurement.It is logical first
It crosses the measurement result of the calibrating gas checking system of measurement known concentration and is calibrated accordingly, atmosphere is showed again later
Field measurement.The generation system deviation during progress in-site measurement after calibration, will lead to measurement result inaccuracy, single from survey
It can not find that the deviation, this technical solution cannot also ensure the accuracy of measurement result in amount result.Therefore, one kind is needed
Self-alignment gas remote measurement instrument may be implemented.
Utility model content
The purpose of this utility model is to provide a kind of self-calibrating gas telemetering equipment, the beneficial effects of the utility model
It is the measurement and calibration that can be realized simultaneously gas concentration by special designing, measures gas concentration at the scene in the process
Whether accurate measurement result is determined, to significantly reduce the error of measurement result.May be implemented in atmosphere a variety of traces and
The long range telemetering of polluted gas, such as carbon dioxide (CO2), methane (CH4) and nitrogen oxides (NOx) etc., there is response speed
Fastly, without sampling pretreatment, real-time online measuring the features such as, the self-calibration structure having can complete the school of measurement result
Standard obtains accurate gas content information.Self-calibrating gas telemetering equipment can be applied to natural gas field, scene of fire and sky
Gas quality-monitoring etc., is of great significance to meteorological research and environmental protection.
Technical solution used by the utility model be include laser, 1:1 fiber optic splitter, two optical fiber collimators,
Sealed multiple reflecting pool, two photodetectors, corner reflector, telescope, two convex lenses, optical filter and two data are adopted
Truck；Wherein, the fiber optic splitter that the laser of laser transmitting first passes around 1:1 is divided into two bundles the identical laser of energy, a branch of
Enter multiple reflecting pool after optical fiber collimator, is connect by being projected after multiple reflections from multiple reflecting pool by photodetector
It receives, is re-fed into data collecting card, then handle and analyze by data collecting card and obtain the concentration of calibrating gas；Another beam of laser warp
It is emitted in the atmosphere of outfield after crossing optical fiber collimator, laser is received after the reflection of corner reflector by telescope, and laser successively passes through
It crosses convex lens, optical filter and convex lens finally to converge on photodetector, is re-fed into data collecting card, is equally acquired by data
Card obtains the concentration of surveyed gas in the atmosphere of outfield.
Further, sealed multiple reflecting pool includes the pressure sensor of two valves and a top, two valves point
Air inlet and outlet Yong Lai not be controlled, is filled with the calibrating gas of known concentration in sealed multiple reflecting pool by valve, and is made
Pressure sensor is shown as standard atmospheric pressure numerical value, and the numerical value measured and gas institute target numerical value are compared, the two deviation compared with
When big, the various pieces of system are adjusted, keeps two values close or even identical, replaces the calibrating gas of various concentration, repeatedly adjust
Whole system makes measurement numerical value identical as true value, and the concentration for measuring outfield atmospheric gas at this time is accurately as a result, completing
The self calibration of gas concentration.
Further, it is repeatedly anti-to be formed to be based on Herriott Cell Maurice Herriott pond principle for sealed multiple reflecting pool
It penetrates.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of self-calibrating gas telemetering equipment.
In figure, 1, laser；2,1:1 fiber optic splitter；3, optical fiber collimator；4, sealed multiple reflecting pool；4-1, valve
Door；4-2, pressure sensor；5, photodetector；6, corner reflector；7, telescope；8, convex lens；9, optical filter；10, data
Capture card.
Specific embodiment
The utility model is described in detail With reference to embodiment.
A kind of self-calibrating gas telemetering equipment of the utility model is as shown in Figure 1, include laser 1,1:1 fiber optic splitter
2, two optical fiber collimators 3,4, two photodetectors 5 of sealed multiple reflecting pool, corner reflector 6, telescope 7, two it is convex
Lens 8, optical filter 9 and two data collecting cards 10.Wherein, Herriott Cell hertz are based in sealed multiple reflecting pool 4
The pond Li Aote principle is to form multiple reflections, wherein the fiber optic splitter 2 that the laser that laser 1 emits first passes around 1:1 divides
It is a branch of to enter multiple reflecting pool 4 after optical fiber collimator 3 for the identical laser of two beam energies, by multiple reflections later from more
Secondary reflection pond 4 is projected and is received by photodetector 5, is re-fed into data collecting card 10, then handle and divide by data collecting card 10
Analysis obtains the concentration of calibrating gas；Another beam of laser is emitted in the atmosphere of outfield after optical fiber collimator 3, and laser is through corner reflection
It after the reflection of device 6, is received by telescope 7, laser successively passes through convex lens 8, optical filter 9 and convex lens 8 and finally converges to photoelectricity
On detector 5, it is re-fed into data collecting card 10, the concentration of surveyed gas in the atmosphere of outfield is equally obtained by data collecting card 10.
Sealed multiple reflecting pool 4 includes the pressure sensor 4-2, two valve 4- of two valve 4-1 and a top
1 is respectively intended to control air inlet and outlet.The Standard Gases of known concentration are filled in sealed multiple reflecting pool 4 by valve 4-1
Body, and pressure sensor 4-2 is made to be shown as standard atmospheric pressure numerical value, the numerical value measured and gas institute target numerical value are compared,
When the two deviation is larger, the various pieces of system are adjusted, keeps two values close or even identical, replaces the Standard Gases of various concentration
Body, multiple adjustment system make measurement numerical value identical as true value, and the concentration for measuring outfield atmospheric gas at this time is as accurate
As a result, completing the self calibration of gas concentration.
Include two-way optical path in system, unknown concentration gas in the measurement and atmosphere of normal concentration gas can be carried out simultaneously
Measurement, the self calibration for gas remote measurement device provides feasibility.
The advantages of the utility model, which also resides in the 1:1 fiber optic splitter installed in system, makes beam of laser be divided into two bundles energy
Identical laser has respectively entered in the inner and outer field atmosphere of sealed multiple reflecting pool, containing in sealed multiple reflecting pool
Know that the calibrating gas of concentration, internal light path can measure the gas of low concentration, such system can be simultaneously up to tens meters
The concentration of surveyed gas in the inner and outer field atmosphere of multiple reflecting pool is obtained, system is adjusted according to the measurement result of calibrating gas, is made
Its measure numerical value it is identical as the marked numerical value of gas, gas remote measurement device is then working properly, at this time in the atmosphere of outfield gas measurement
It as a result is that accurately, the self calibration of system may be implemented.
The above is only the better embodiment to the utility model, not makees any form to the utility model
On limitation, all any simple modifications made to embodiment of above according to the technical essence of the utility model are equivalent to become
Change and modify, is all within the scope of the technical scheme of the utility model.
Claims (1)
1. a kind of self-calibrating gas telemetering equipment, it is characterised in that: including laser, 1:1 fiber optic splitter, two optical fiber standards
Straight device, sealed multiple reflecting pool, two photodetectors, corner reflector, telescope, two convex lenses, optical filter and two
Data collecting card；Wherein, it is identical sharp that the fiber optic splitter that the laser of laser transmitting first passes around 1:1 is divided into two bundles energy
Light, it is a branch of to enter multiple reflecting pool after optical fiber collimator, it is visited by being projected after multiple reflections from multiple reflecting pool by photoelectricity
It surveys device to receive, is re-fed into data collecting card, then handle and analyze by data collecting card and obtain the concentration of calibrating gas；Another beam
Laser is emitted in the atmosphere of outfield after optical fiber collimator, and laser is received after the reflection of corner reflector by telescope, laser
It is successively finally converged on photodetector by convex lens, optical filter and convex lens, data collecting card is re-fed into, equally by counting
The concentration of surveyed gas in the atmosphere of outfield is obtained according to capture card, sealed multiple reflecting pool includes two valves and a top
Pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821505040.1U CN209231211U (en) | 2018-09-14 | 2018-09-14 | A kind of self-calibrating gas telemetering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821505040.1U CN209231211U (en) | 2018-09-14 | 2018-09-14 | A kind of self-calibrating gas telemetering equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209231211U true CN209231211U (en) | 2019-08-09 |
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ID=67498583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821505040.1U Expired - Fee Related CN209231211U (en) | 2018-09-14 | 2018-09-14 | A kind of self-calibrating gas telemetering equipment |
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| Country | Link |
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| CN (1) | CN209231211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115721A (en) * | 2018-09-14 | 2019-01-01 | 国家海洋局第海洋研究所 | There is the gas remote measurement device of self-calibration function based on tunable laser |
-
2018
- 2018-09-14 CN CN201821505040.1U patent/CN209231211U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115721A (en) * | 2018-09-14 | 2019-01-01 | 国家海洋局第海洋研究所 | There is the gas remote measurement device of self-calibration function based on tunable laser |
| CN109115721B (en) * | 2018-09-14 | 2024-05-28 | 国家海洋局第一海洋研究所 | Gas telemetry device with self-calibration function based on tunable laser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190809 Termination date: 20200914 |