CN206146554U - Gas temperature detection device based on but tuning diode laser absorption spectrum - Google Patents
Gas temperature detection device based on but tuning diode laser absorption spectrum Download PDFInfo
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- CN206146554U CN206146554U CN201621205975.9U CN201621205975U CN206146554U CN 206146554 U CN206146554 U CN 206146554U CN 201621205975 U CN201621205975 U CN 201621205975U CN 206146554 U CN206146554 U CN 206146554U
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- gas
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- diode laser
- temperature detection
- gas temperature
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Abstract
The utility model provides a gas temperature detection device based on but tuning diode laser absorption spectrum, but tuning diode laser absorption spectrum gas detection technology field belonged to. System's device includes: emission unit (11), a burning gas absorption pond unit (12), receiving element (13), central control processing unit (14). The utility model discloses an emission unit produces the laser beam that center wavelength be 1390nm, and the light beam is through a burning gas absorption pond, measures the light intemsity variation of laser after burning by receiving element, carries out data processing and measure the temperature's real -time demonstration by central control processing unit at last.
Description
Technical field
This utility model is related to a kind of gas temperature detection means based on tunable diode laser absorption spectroscopy, belongs to
Tunable diode laser absorption spectroscopy gas detection technology field.
Background technology
At present thermometry is divided into contact and non-contact measurement according to metering system, and contact type measurement is that point type is surveyed
Amount, temperature corresponding linear degree is not high in specific range of temperatures, and detection sensitivity is low.During noncontact thermometric then need not with it is tested
Object contact, and without interference with temperature field, be suitable for and thermometric under hot conditionss.Tuning diode laser absorption spectroscopy is used
Without interference with flow field to be measured when combustion field gas temperature measuring, with high sensitivity, high spectral resolution, it is quickly corresponding when
Between, many reference amounts measure advantage simultaneously.
The content of the invention
This utility model provides a kind of gas temperature detection means based on tunable diode laser absorption spectroscopy, with
Solve the problems, such as that contact type measurement environment is limited in field of pyrometry, do not reach high accuracy and detection sensitivity is low, and then
There is provided a kind of gas temperature detection means based on tunable diode laser absorption spectrometry, for this purpose, this utility model provides following
Technical scheme：A kind of gas temperature detection means based on tunable diode laser absorption spectroscopy, including：Transmitter unit, combustion
Burn field GAS ABSORPTION pool unit, receiving unit, central control processing unit.This utility model is by cardiac wave in transmitter unit generation
The laser beam of a length of 1390nm, light beam passes through combustion field gas absorption cell, by receiving unit Laser Measurement after combustion field
Light intensity change, finally data processing and the real-time display of measurement temperature are carried out by central control processing unit.
Tunable diode laser absorption spectroscopy gas temperature detection means described in the utility model, transmitter unit is adopted
Operating central wavelength is located at the semiconductor laser with tunable of 1390nm, and temperature controller is used to control tunable semiconductor laser
The operating temperature of device, current controller loads the triangular voltage sweep voltage signal input controller of 100Hz by signal generator
Current terminal, drive laser wavelength scan near 1390nm.Then by the laser of respective wavelength by optical fiber and homemade
Optical fiber collimator enters combustion field gas absorption cell.
Tunable diode laser absorption spectroscopy gas temperature detection means described in the utility model, combustion field gas is inhaled
Receives pond realizes gas uniform high temperature environment using five reflection cavity gas absorption cells of three area combustion furnace 30cm light paths.
Tunable diode laser absorption spectroscopy gas temperature detection means described in the utility model, receiving unit is by light
Light intensity change of the electric conversion detector PDA10CS Laser Measurement after combustion field, is translated into after the signal of telecommunication and is input to lock
Phase lock-in detecting is carried out in phase amplifier and second harmonic signal is exported, signal is carried out finally by multifunctional data acquisition card and is adopted
Collection.
Tunable diode laser absorption spectroscopy gas temperature detection means described in the utility model, central control process
The signal that unit collects data collecting card USB2850 carries out data processing, using embedded OS editor, will measure
As a result show in real time on a display screen.
The beneficial effects of the utility model：Transmitter unit adopts 1392.80nm and 1393.05nm H20 absorption lines pair,
Because the important gas of combustion product during water, this utility model can measure the combustion field temperature under different combustion conditions, and water steams
Two spectral lines pair of gas are also to screen through demarcation, notable to the assimilation effect of spectral line in gas absorption cell, to measurement
Gas parameter under adverse circumstances, there is good adaptability.
Description of the drawings
The structure of the tunable diode laser absorption spectroscopy gas temperature detection means that Fig. 1 is provided for this utility model is shown
It is intended to.
Fig. 2 is detecting system schematic diagram of the present utility model.
Fig. 3 is the selection of the absorption spectrum absworption peak of vapor of the present utility model.
Specific embodiment
The characteristics of in order to more clearly illustrate this utility model and work ultimate principle, below in conjunction with accompanying drawing, to this
Experiment is new to be illustrated：This specific embodiment provide firstly a kind of based on tunable diode laser absorption spectroscopy
（TDLAS）Gas temperature detects experiment device for teaching, as shown in figure 1, including：Transmitter unit（11）, combustion field gas absorption cell
（12）, receiving unit（13）And central control processing unit（14）；Transmitter unit（11）Laser after modulation is accurate through optical fiber
Straight device single passes through combustion field gas absorption cell to be measured（12）, by receiving unit（13）Light intensity of the measurement after combustion field becomes
Change, finally by central control processing unit（14）Carry out data processing and the real-time display of measurement temperature.
Wherein, as shown in Fig. 2 transmitter unit is by 2 tunable Distributed Feedback Lasers and its driving means, fiber coupler, standard
Straight device, the working condition with switched laser device is controlled by computer processing unit, makes LASER Light Source send specific wavelength
Semiconductor laser beam, after fiber coupler, is scanned to gas, and this utility model adopts ITC5022 laser diodes
Current temperature controller realizes that the temperature control and electric current of Distributed Feedback Laser drives by driving LM14S2 butterflies encapsulation base plate.
Embodiment, as shown in Fig. 2 receiving unit by photoelectric sensor VIGO mercury-cadmium tellurid detectors by after GAS ABSORPTION
Optical signal is converted into the signal of telecommunication, and after amplification, filtering etc. are processed, being transferred to host computer by data collecting card carries out spectral signal
Analysis and process, so as to obtain temperature.Central control processing unit utilizes LabVIEW software programmings by embedded system, completes
The data that data collecting card is transferred to host computer are processed, shown and stored, and is led to transmitting and receiving unit
The working condition of news, real-time detection semiconductor laser and control circuit.In upper computer software, user can be to absorption spectrum
It is analyzed, the parameter such as setting laser instrument is demarcated to analysis system, convenient to debug and practical.
The operation principle of the tunable diode laser absorption spectroscopy gas temperature detection means that this utility model is provided
Including:Absorption spectrum measure ultimate principle, when a branch of light with continuous wavelength pass through a kind of material when, some of light beam into
Dividing to have weakened, and when spectrum analyses are carried out by spectrogrph through the absorbed light beam of material, can just obtain the material
Absorption spectrum, then the data in absorption spectrum are being inferred to species, concentration and the temperature of measured matter.
The above, only this utility model preferably specific embodiment, it is new that this embodiment is all based on this practicality
The implementation of type general idea, and protection domain of the present utility model is not limited thereto, it is any to be familiar with the art
Technical staff in the technical scope that this utility model is disclosed, the change or replacement that can be readily occurred in all should be covered in this reality
Within new protection domain.Therefore, protection domain of the present utility model should be defined by the protection domain of claims.
Claims (5)
1. a kind of gas temperature detection means based on tunable diode laser absorption spectroscopy, it is characterised in that include：Transmitting
Unit（11）, combustion field GAS ABSORPTION pool unit（12）, receiving unit（13）And central control processing unit（14）；Transmitter unit
（11）Laser after modulation is sent into into optical fiber collimator and passes through combustion field GAS ABSORPTION pool unit to be measured（12）, by receiving unit
（13）Light intensity change of the measurement after combustion field, finally by central control processing unit（14）Carry out data processing and measurement temperature
The real-time display of degree.
2. the gas temperature detection means based on tunable diode laser absorption spectroscopy according to claim 1, it is special
Levy and be, transmitter unit（11）Distributed Feedback Laser, laser controller, current controller and the temperature controller encapsulated using butterfly.
3. the gas temperature detection means based on tunable diode laser absorption spectroscopy according to claim 1, it is special
Levy and be, combustion field GAS ABSORPTION pool unit（12）Using five reflection cavity gas absorption cells of three area combustion furnace 30cm light paths come real
Existing gas uniform high temperature environment.
4. the gas temperature detection means based on tunable diode laser absorption spectroscopy according to claim 1, it is special
Levy and be, receiving unit（13）Using VIGO mercury-cadmium tellurid detector modules, data collecting card.
5. the gas temperature detection means based on tunable diode laser absorption spectroscopy according to claim 1, it is special
Levy and be, central control processing unit（14）LabVIEW software programmings are utilized using embedded system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621205975.9U CN206146554U (en) | 2016-11-09 | 2016-11-09 | Gas temperature detection device based on but tuning diode laser absorption spectrum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621205975.9U CN206146554U (en) | 2016-11-09 | 2016-11-09 | Gas temperature detection device based on but tuning diode laser absorption spectrum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206146554U true CN206146554U (en) | 2017-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621205975.9U Expired - Fee Related CN206146554U (en) | 2016-11-09 | 2016-11-09 | Gas temperature detection device based on but tuning diode laser absorption spectrum |
Country Status (1)
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| CN (1) | CN206146554U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657993A (en) * | 2019-10-17 | 2020-01-07 | 北京航空航天大学 | Method for monitoring combustion field of aero-engine based on all-fiber optical frequency comb system |
| CN111089850A (en) * | 2020-02-17 | 2020-05-01 | 北京航空航天大学 | Multi-component concentration estimation method based on single-component absorption spectrum |
-
2016
- 2016-11-09 CN CN201621205975.9U patent/CN206146554U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110657993A (en) * | 2019-10-17 | 2020-01-07 | 北京航空航天大学 | Method for monitoring combustion field of aero-engine based on all-fiber optical frequency comb system |
| CN111089850A (en) * | 2020-02-17 | 2020-05-01 | 北京航空航天大学 | Multi-component concentration estimation method based on single-component absorption spectrum |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170503 Termination date: 20181109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |