CN107449752A - Light source decay automatic compensating method in a kind of uv analyzer - Google Patents
Light source decay automatic compensating method in a kind of uv analyzer Download PDFInfo
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- CN107449752A CN107449752A CN201710625871.6A CN201710625871A CN107449752A CN 107449752 A CN107449752 A CN 107449752A CN 201710625871 A CN201710625871 A CN 201710625871A CN 107449752 A CN107449752 A CN 107449752A
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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
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
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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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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides light source decay automatic compensating method, pollution sources measurement of concetration error caused by solving the pollution of light path and the decay of light source in a kind of uv analyzer；By adjusting the output energy of light source, to ensure that the spectral intensity that spectrometer receives is maintained in error range with the spectral intensity before air chamber pollution；And it is in non-measured sample gaseity with the gas circuit valve transfer inside processor control analyzer, guarantee analyzer；Air is extracted with sampling pump, wait in air chamber after gas stabilization, spectral intensity in the controller collection fixed cycle, contrast the spectral intensity before air chamber pollution, according to strength difference before and after pollution and ratio, calculate light intensity attenuation amount and intensity of light source regulated quantity, after intensity of light source regulated quantity changed into voltage signal output light source light intensity regulating port by D/A；Until by light intensity regulating to optimal effectiveness；Recover gas circuit to sample gas measuring state, the spectrum after regulation is stored, the zero gas line as next stage gasmetry uses.
Description
Technical field
Light source decay automatic compensating method, belongs to Online monitoring of pollution sources art in a kind of uv analyzer of the present invention
Field.
Background technology
Ultraviolet gas analyzer is mainly used in line source SO2With NO Concentration Testings, use environment is severe, is measured gas
Material, the front-end preprocessor systems such as dust, steam would generally be contained in body to be removed it completely, therefore be measured in long-time
During, polluter i.e. lens absorption pollution, must can so be made by the gas compartment trends of the times to being polluted inside gas compartment
Decay into through air chamber spectral intensity, simultaneously because the self-characteristic of light source, when long-time uses, light source can also produce decay,
Inverse concentration error is in turn resulted in, therefore spectral intensity need to be adjusted by specific method, and then compensates measurement concentration
Purpose.
The content of the invention
The invention provides light source decay automatic compensating method in a kind of uv analyzer, solve to correct ultraviolet gas analysis
During instrument long-time on-line measurement, due to pollution sources measurement of concetration error caused by the pollution of light path and the decay of light source.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：Light source is decayed in a kind of uv analyzer
Automatic compensating method, implement in the steps below：
First, regulation spectrum is the output energy for adjusting light source, to ensure that the spectral intensity that spectrometer receives pollutes with air chamber
Preceding spectral intensity is maintained in error range；
Second, the gas circuit valve transfer inside analyzer is controlled by processor, ensures that analyzer is in non-measured sample gaseity；
3rd, air is extracted by sampling pump, waited in air chamber after gas stabilization, the spectrum in the controller collection fixed cycle is strong
Degree, the spectral intensity before contrast air chamber pollution, according to strength difference before and after pollution and ratio, calculates light intensity attenuation amount；
4th, according to light intensity attenuation amount, calculate intensity of light source regulated quantity, after intensity of light source regulated quantity is changed into by D/A
Voltage signal output light source light intensity regulating port；
5th, the action of the 4th step is repeated several times, by light intensity regulating to optimal effectiveness；
6th, recover gas circuit to sample gas measuring state, the spectrum after regulation is stored, zero as next stage gasmetry
Gas line uses.
The light source xenon source, there are light source output triggering control interface and light source output strong on the xenon source of selection
Degree regulation interface, this two interface are directly connected to master control borad, and master control borad adjusts triggering frequency and the intensity of light source as the case may be,
And then ensure that spectrometer is transmitted to the electric signal of master control borad and keep constant.
The regulation of spectrum triggering frequency is added on the basis of spectral intensity is adjusted, is thus inscribed to adjust the unit interval
By photon numbers, and then play a part of adjusting spectral intensity, with reference to both intensity adjustment methods, to complete the conjunction of light intensity
Reason regulation, the regulating effect being optimal.
The present invention has an advantageous effect in that compared with prior art：The present invention is carried out automatic with regular time to spectrum
Regulation, measurement drift for a long time is reduced, lengthen site maintenance period, measurement data is stable, more real reflection scene pollution
The emission behaviour in source.
Brief description of the drawings
The present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 is the structural schematic block diagram of the present invention.
Embodiment
As shown in figure 1, light source decay automatic compensating method in a kind of uv analyzer of the present invention, implements in the steps below：
First, regulation spectrum is the output energy for adjusting light source, to ensure that the spectral intensity that spectrometer receives pollutes with air chamber
Preceding spectral intensity is maintained in error range；
Second, the gas circuit valve transfer inside analyzer is controlled by processor, ensures that analyzer is in non-measured sample gaseity；
3rd, air is extracted by sampling pump, waited in air chamber after gas stabilization, the spectrum in the controller collection fixed cycle is strong
Degree, the spectral intensity before contrast air chamber pollution, according to strength difference before and after pollution and ratio, calculates light intensity attenuation amount；
4th, according to light intensity attenuation amount, calculate intensity of light source regulated quantity, after intensity of light source regulated quantity is changed into by D/A
Voltage signal output light source light intensity regulating port；
5th, the action of the 4th step is repeated several times, by light intensity regulating to optimal effectiveness；
6th, recover gas circuit to sample gas measuring state, the spectrum after regulation is stored, zero as next stage gasmetry
Gas line uses.
If regulation is carried out continuously 3 times to reach optimal effectiveness.If attenuation is too big, light intensity can be caused can not to adjust to optimal
Effect, therefore, the regulation of spectrum triggering frequency is added on the basis of spectral intensity is adjusted, is thus adjusted in the unit interval
Photon numbers are received, and then play a part of adjusting spectral intensity, with reference to both intensity adjustment methods, to complete light intensity
Reasonable adjusting, the regulating effect being optimal.
The light source xenon source, there are light source output triggering control interface and light source output strong on the xenon source of selection
Degree regulation interface, this two interface are directly connected to master control borad, and master control borad adjusts triggering frequency and the intensity of light source as the case may be,
And then ensure that spectrometer is transmitted to the electric signal of master control borad and keep constant.
Ultraviolet gas analyzer functional measurement principle of the present invention：Ultraviolet source sends ultraviolet light, is changed into by lens flat
Row light, by way of tested gas compartment, after by lens directional light is converged at into optical fiber, be then transmit to spectrometer, spectrometer by its
It is electric signal by photoelectric conversion, transmits to master control borad, main control processor is calculated by difference spectrum algorithm passes through air chamber gas
Concentration.Show finally by display module, and exported in real time using digital and analog interface.
The present invention is automatically adjusted with regular time to spectrum, is reduced measurement drift for a long time, is lengthened on-site maintenance
In the cycle, measurement data is stable, more really reflects the emission behaviour of live pollution sources.
Embodiments of the invention are explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned implementation
Example, in those of ordinary skill in the art's possessed knowledge, can also make on the premise of present inventive concept is not departed from
Go out various change.
Claims (3)
1. light source decay automatic compensating method in a kind of uv analyzer, it is characterised in that implement in the steps below：
First, regulation spectrum is the output energy for adjusting light source, to ensure that the spectral intensity that spectrometer receives pollutes with air chamber
Preceding spectral intensity is maintained in error range；
Second, the gas circuit valve transfer inside analyzer is controlled by processor, ensures that analyzer is in non-measured sample gaseity；
3rd, air is extracted by sampling pump, waited in air chamber after gas stabilization, the spectrum in the controller collection fixed cycle is strong
Degree, the spectral intensity before contrast air chamber pollution, according to strength difference before and after pollution and ratio, calculates light intensity attenuation amount；
4th, according to light intensity attenuation amount, calculate intensity of light source regulated quantity, after intensity of light source regulated quantity is changed into by D/A
Voltage signal output light source light intensity regulating port；
5th, the action of the 4th step is repeated several times, by light intensity regulating to optimal effectiveness；
6th, recover gas circuit to sample gas measuring state, the spectrum after regulation is stored, zero as next stage gasmetry
Gas line uses.
2. light source decay automatic compensating method in a kind of uv analyzer according to claim 1, it is characterised in that described
Light source xenon source, there are light source output triggering control interface and light source output intensity adjustment interface on the xenon source of selection,
This two interface is directly connected to master control borad, and master control borad adjusts triggering frequency and the intensity of light source as the case may be, and then ensures light
Spectrometer transmits to the electric signal of master control borad and keeps constant.
3. light source decay automatic compensating method in a kind of uv analyzer according to claim 1, it is characterised in that adjusting
The regulation of spectrum triggering frequency is added on the basis of section spectral intensity, number of photons is thus received in the unit interval to adjust
Amount, and then play a part of adjusting spectral intensity, with reference to both intensity adjustment methods, to complete the reasonable adjusting of light intensity, reach
To optimal regulating effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710625871.6A CN107449752A (en) | 2017-07-27 | 2017-07-27 | Light source decay automatic compensating method in a kind of uv analyzer |
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| CN201710625871.6A CN107449752A (en) | 2017-07-27 | 2017-07-27 | Light source decay automatic compensating method in a kind of uv analyzer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911929A (en) * | 2017-12-21 | 2018-04-13 | 苏州汉策能源设备有限公司 | A kind of autocontrol method and device of xenon source constant intensity |
| CN109883977A (en) * | 2019-03-26 | 2019-06-14 | 翼捷安全设备（昆山）有限公司 | A kind of self-compensating infrared blackbody light source and compensation method |
| CN110658142A (en) * | 2019-10-30 | 2020-01-07 | 苏州卫水环保科技有限公司 | Total nitrogen analyzer signal detection system and method |
| CN112304888A (en) * | 2019-07-31 | 2021-02-02 | Tcl集团股份有限公司 | Water quality detection method, system and storage medium |
| CN113514533A (en) * | 2020-04-10 | 2021-10-19 | 中国石油化工股份有限公司 | Volatile dangerous chemical leakage detector |
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|---|---|---|---|---|
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| CN109883977A (en) * | 2019-03-26 | 2019-06-14 | 翼捷安全设备（昆山）有限公司 | A kind of self-compensating infrared blackbody light source and compensation method |
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| CN112304888A (en) * | 2019-07-31 | 2021-02-02 | Tcl集团股份有限公司 | Water quality detection method, system and storage medium |
| CN110658142A (en) * | 2019-10-30 | 2020-01-07 | 苏州卫水环保科技有限公司 | Total nitrogen analyzer signal detection system and method |
| CN113514533A (en) * | 2020-04-10 | 2021-10-19 | 中国石油化工股份有限公司 | Volatile dangerous chemical leakage detector |
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Application publication date: 20171208 |