CN206583795U - A kind of multi-parameter water quality real time on-line monitoring device based on spectroscopic methodology - Google Patents
A kind of multi-parameter water quality real time on-line monitoring device based on spectroscopic methodology Download PDFInfo
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Abstract
The utility model is related to a kind of multi-parameter water quality real time on-line monitoring device based on spectroscopic methodology.The device includes hernia lamp source, preposition light path, spectrum acquiring unit, quick processing platform and output unit；Hernia lamp source emergent light is divided into correction reference path and optical path after preposition light path；Correction reference path is incident to spectrum acquiring unit by water sample to be measured；Optical path is incident to spectrum acquiring unit by standard water sample；Correction reference path and optical path are sent to fast processing unit after changing into two groups of curve of spectrum data signals after spectrum acquiring unit is synchronously obtained；Fast processing unit is output to Local or Remote to realize monitoring after obtaining the concentration of test substance present in water sample to be measured and test substance after respectively handling two groups of curve of spectrum data signals by output unit.The device to test cycle is short, small volume, cost are low and can realize in real time, the water quality measurement of multi-parameter.
Description
Technical field
The utility model belongs to optical detector technology field, and in particular to a kind of multi-parameter water quality based on spectroscopic methodology is real-time
On-Line Monitor Device.
Background technology
Water resource pollution be world today's water environment face it is most severe the problem of one of, how in time, accurately, quickly,
Comprehensively reflection water body environment quality and the situation of pollution sources, are to formulate practicable prevention and cure of pollution planning and pollution sources situation
Premise and basis.
At present, following several method is had based on water quality detection：Chemical analysis, atom or Molecular Spectroscopy, chromatogram point
From technology, electrochemical analysis techniques, biosensor technique；
Wherein, the Water Test Kits based on chemical method in water quality monitoring exist sampling test period length, one-parameter measurement,
Secondary pollution, the problems such as waste time and energy；
Water Test Kits based on atom or molecular spectrum, chromatographic isolation has that to be unable to multi-parameter same in water quality monitoring
When analysis, the standard working curve range of linearity is narrow, complex sample analysis when precision it is relatively low the problems such as；
Water Test Kits based on electrochemical analysis techniques is although portable, but there is pollution, power consumption in water quality monitoring, locates
The problems such as managing costly.
Situations such as with test substance irreversible chemical reaction occurs for recognition component, influence identification occurs in biosensor technique
Ability and sensitivity, miniaturization in addition is realized difficult.
Utility model content
The problem of in order to solve in background technology, the utility model provides that a kind of test period is short, small volume, cost are low
And real-time, the multi-parameter water quality real time on-line monitoring device based on spectroscopic methodology of the water quality measurement of multi-parameter can be realized.
General principle of the present utility model is：
Multi-parameter water quality real time on-line monitoring device based on spectroscopic methodology, be utilize water body in pollution element in different ripples
The absorption spectrum curve of long position judges the method for the composition and content of pollution element.According to Lambert-Beer's law, pass through dirt
The position of component spectrum curve " peak " and " paddy " is contaminated to judge the composition of pollutant, by its amplitude and combination calibrating method sentence
Break the concentration of the pollution element, and realize with this qualitative and quantitative detection of multiple water quality parameters.The initial data measured water body,
By the way that the solution for based on high speed ARM processing units, carrying out the water body multiple pollutant curve of spectrum is mixed, Real-time Reconstruction, again by wireless
The diversified forms such as mode, wired mode, solid-state storage are provided to subscriber unit.
The device can realize the colourity to water body, turbidity, COD (COD), biochemical oxygen demand (BOD) (BOD), total organic
Carbon (TOC), total nitrogen (TN), total phosphorus (TP), nitrate, cryanide ion, Cr VI, bromide ion (Br-, bromide), it is coloured dissolved to have
The monitoring of many kinds of substance attributes such as machine thing (CDOM) and content.
Concrete technical scheme of the present utility model is：
The utility model provides a kind of multi-parameter water quality real time on-line monitoring device based on spectroscopic methodology, and its feature exists
In：Including xenon source, preposition light path, spectrum acquiring unit, quick processing platform and output unit；
Xenon source emergent light is divided into correction reference path and optical path after preposition light path；Reference path is corrected to lead to
Cross water sample to be measured and be incident to spectrum acquiring unit；Optical path is incident to spectrum acquiring unit by standard water sample；Correction reference
Light path and optical path changed into after spectrum acquiring unit is synchronously obtained sent after two groups of curve of spectrum data signals to
Fast processing unit；Fast processing unit is obtained after handling respectively two groups of curve of spectrum data signals and deposited in water sample to be measured
Test substance and test substance concentration after Local or Remote is output to so as to realizing monitoring by output unit；
Fast processing unit is the multi-parameter water-quality Intelligent Processing Platform based on ARM.
Wherein, spectrum acquiring unit includes the first collimating mirror, slit, the first speculum, fibre bundle, grating, the second collimation
Mirror, detector, the second speculum group into；
Reference path is corrected after standard water sample, by the second collimating mirror, in the image planes position of the second collimating mirror
Put and slit is sent to by fibre bundle, then grating is reflexed to by the first speculum, grating carries out dispersion to correction reference path
Received afterwards by the reflection of the second speculum by detector；
Optical path passes through after water sample to be measured through the first collimating mirror, in an image planes position of the first collimating mirror
Fibre bundle reflexes to grating to slit, then by the first speculum, and grating is carried out after dispersion by second to water sample light path to be measured
Received after speculum reflection by detector.
The spectral coverage of the emergent light of above-mentioned xenon lamp source module hair includes ultraviolet light, visible ray, near infrared light, and spectrum is
185nm~1100nm.
Above-mentioned grating is plane grating, concave grating, concave holographic grating or adjustable balzed grating,.
Above-mentioned detector is silicon photocell or planar array detector.
Wherein, output unit is Network transmission line, is wirelessly transferred or solid-state storage.
Specifically, the preposition light path includes imaging lens and collimating mirror.
Fast processing unit is handled two groups of curve of spectrum data signals respectively in the utility model, its specific place
Reason process comprises the following steps：
1) standard database is set up；Master sample database includes the different material dissolved in water, the feature of different material
Spectrum, Matter Composition is determined by " reflection peak " or " absorbing paddy " of characteristic spectrum；By every kind of Matter Composition in characteristic light
The size of the corresponding range value of spectral position determines the concentration of material；
2) in water sample to be measured material determination；
2.1) the characteristic spectrum A of standard water sample is obtained by the curve of spectrum data signal of standard water sample；
2.2) the characteristic spectrum B of water sample to be measured is obtained by the curve of spectrum data signal of water sample to be measured；
2.3) the characteristic spectrum B normalizings of the characteristic spectrum A of standard water sample and water sample to be measured, which are turned into after difference, obtains characteristic spectrum C
" reflection peak " or " absorb paddy ", search standard database, judge the Matter Composition of water sample to be measured, if in water sample to be measured
Containing single substance, then step 3 is carried out)；If containing many kinds of substance in water sample to be measured, then step 4 is carried out)；
3) Concentration Testing in water sample to be measured containing only single substance：
3.1) coefficient matrix K, such as following formula are calculated according to sample database and absorbance formula：
In formula：I1、I2、…InFor the width of the multiple continuous spectrum known after water sample to be measured of optical path in standard database
Angle value, I0-1、I0-2、I0-nTo correct known continuous spectrum range value of the reference path after standard water sample in standard database,
C1、C2、…CnFor the components and concentration under each absorbance, L is fixed optical path difference；
3.2) absorbance formula again according to Lambert-Beer's law, calculates correction reference path ith and passes through water sample to be measured
The concentration measured afterwards：
In formula：IiFor the range value of the continuous spectrum obtained after water sample to be measured, I0-iFor by the continuous spectrum of standard water sample
Range value, CiFor single substance concentration in water sample to be measured, L is fixed optical path difference, and test sample can must be treated after substituting into the K values tried to achieve
Concentration of material, is shown below in this：
4) Concentration Testing containing many kinds of substance in water sample to be measured：
4.1) coefficient matrix K, such as following formula are calculated according to sample database and absorbance formula：
In formula：I1、I2、…InFor the amplitude of the multiple continuous spectrum known after water sample to be measured of optical path in database
Value, I0-1、I0-2、I0-nTo correct the range value of reference path continuous spectrum after standard water sample, C in databasenmFor m kind things
The n concentration of matter, L is fixed optical path difference；
4.2) absorbance formula again according to Lambert-Beer's law, calculates correction reference path ith and passes through water sample to be measured
The concentration measured afterwards：
IiFor the range value after water sample to be measured, I0-iFor by the intensity level of standard water sample, CiFor i-th kind of composition and its
Concentration, L is fixed optical path difference, can obtain concentration to be measured after substituting into the K values tried to achieve, be shown below：
Then C1、C2、…Ci、CnThe concentration of many kinds of substance in respectively corresponding water sample to be measured.
The utility model has the advantage of：
1st, existing chemical method water quality measurement can only measure the composition and concentration of single water quality element, and the present invention possesses many ginsengs
The ability that number water quality composition and concentration are obtained.
2nd, existing optical method water quality measurement does not have the reference correction design of synchro measure, and the utility model devises synchronization
The dual-beam reference light paths of measurement, the active correction ability for possessing systematic error, it is very high to measure the precision used for a long time, especially
The correction of light intensity attenuation is used for a long time for xenon lamp.
3rd, the utility model uses concave holographic grating or adjustable balzed grating, compared to conventional method, can realize sample
While machine is minimized, the high signal to noise ratio of acquisition and measurement accuracy.
4th, the corresponding equipment instrument of the utility model it is small, lightweight, without reagent and advance sample, plug and play,
Quick response.
5th, the utility model, which is not required to add any chemical solution, measures, and does not result in the secondary pollution of water body, compares
Traditional chemical method has remarkable advantage.
6th, the utility model possesses the real-time online Treatment Analysis ability to multi-parameter water-quality, can be detected, compared with networking
The single probe of conventional detection methods, non real-time measurement etc. has a clear superiority.
7th, the utility model is flexibly exported using multiplex roles, compared to traditional single face, and artificial reading etc. possesses significantly
Advantage.
Brief description of the drawings
Fig. 1 is the utility model optical texture schematic diagram.
Reference is as follows：
The preposition light path of 1- xenon sources, 2-, the collimating mirrors of 3- first, 4- slits, the speculums of 5- first, 6- fibre bundles, 7- light
Grid, the collimating mirrors of 8- second, 9- detectors, the speculums of 10- second, the quick processing platforms of 11-, 12- output units.
Embodiment
As shown in figure 1, multi-parameter water quality real time on-line monitoring device bag of the light based on spectroscopic methodology that the utility model is provided
Include xenon source 1,2 preposition light paths 2, the first collimating mirror 3, slit 4, the first speculum 5, fibre bundle 6, grating 7, the second collimating mirror
8th, detector 9, the second speculum 10, quick processing platform 11, output unit 12.
Embodiment of the present utility model is as follows：
(the spectral coverage covering of xenon source of xenon source 1：Ultraviolet light, visible ray, near infrared light, spectrum be 185nm~
Light 1100nm) sent passes through preposition light path 2, is divided into two beams, and light beam (this Shu Guangwei corrects reference path) passes through standard
Water sample, the second beam light (this Shu Guangwei optical path) passes through water sample to be measured, wherein, the first beam is after the second collimating mirror 8, the
Optical signal is sent to slit 4 by two image planes of collimating mirror 8 one times by fibre bundle 6, is again incident on the first speculum 5 and is passed through grating 7
Passed through after the dispersion of (the different gratings such as plane grating, concave grating, concave holographic grating, adjustable balzed grating, may be selected in grating)
Second speculum 10 reflexes to detector 9 (silicon photocell, planar array detector may be selected in detector).
Second beam light is passed optical signal by fibre bundle 6 in 3 image planes of the first collimating mirror after the first collimating mirror 3
Slit 4 is delivered to, is incided after the first speculum 5 reflects through the first speculum 5 through the dispersion of grating 7, then after the second speculum 10
To detector 9, this two-beam dispersion is distributed in not going together on pixel for detector after opening, by opto-electronic conversion, obtained spectrum
Message digit signal is transmitted to quick processing platform 11 (the multi-parameter water-quality Intelligent Processing Platform based on ARM), and quick processing is flat
The electric signal that platform 11 is changed to two-beam carries out dark current removal, filtering, spectroscopic data is extracted, multi-parameter water-quality spectrum solution is mixed etc.
The concentration of test substance and test substance present in water sample to be measured is obtained after processing, this is issued to by output unit 12
Ground is long-range so as to realize monitoring；, output unit include diversified forms Network transmission line, wired mode, antenna, solid-state storage
Deng.
Wherein, the multi-parameter water-quality Intelligent Processing Platform based on ARM is the circuit-board card based on ARM chip processors,
On this chip device, linux and Android system can be loaded, algorithm process is carried out.
Specific algorithm process comprises the following steps：
Fast processing unit is handled two groups of curve of spectrum data signals respectively, is comprised the following steps：
Step 1) set up standard database；Master sample database includes the different material dissolved in water, different material
Characteristic spectrum, Matter Composition is determined by " reflection peak " or " absorbing paddy " of characteristic spectrum；By every kind of Matter Composition in spy
The size for levying the corresponding range value of spectral position determines the concentration of material；
Step 2) determination of material in water sample to be measured；
Step 2.1) the characteristic spectrum A of standard water sample is obtained by the curve of spectrum data signal of standard water sample；
Step 2.2) the characteristic spectrum B of water sample to be measured is obtained by the curve of spectrum data signal of water sample to be measured；
Step 2.3) the characteristic spectrum A of standard water sample and the characteristic spectrum B normalizings of water sample to be measured be turned into after difference and obtain feature
Spectrum C " reflection peak " or " absorbing paddy ", searches standard database, the Matter Composition of water sample to be measured is judged, if water to be measured
Containing only single substance in sample, then step 3 is carried out)；If；If containing many kinds of substance in water sample to be measured, then step 4 is carried out)；
Step 3) Concentration Testing in water sample to be measured containing only single substance：
Step 3.1) calculate coefficient matrix K, such as following formula according to sample database and absorbance formula：
In formula：I1、I2、…InFor optical path in standard database repeatedly after water sample to be measured continuous spectrum range value,
I0-1、I0-2、I0-nTo correct the range value of continuous spectrum of the reference path after standard water sample, C in standard database1、C2、…Cn
For the components and concentration under each absorbance, L is fixed optical path difference；
Step 3.2) again according to Lambert-Beer's law absorbance formula, calculate correction reference path ith pass through it is to be measured
The concentration measured after water sample：
In formula：IiFor the range value obtained after water sample to be measured, I0-iFor the range value obtained after standard water sample, Ci
For components and concentration, L is fixed optical path difference, the concentration of material in sample to be tested can be obtained after substituting into the K values tried to achieve, such as following formula institute
Show：
Step 4) Concentration Testing containing many kinds of substance in water sample to be measured：
Step 4.1) calculate coefficient matrix K, such as following formula according to sample database and absorbance formula：
In formula：I1、I2、…InFor optical path in standard database repeatedly after water sample to be measured continuous spectrum range value,
I0-1、I0-2、I0-nTo correct the range value of reference path continuous spectrum after standard water sample, C in standard databasenmFor m kind things
The n concentration of matter, L is fixed optical path difference；
Step 4.2) again according to Lambert-Beer's law absorbance formula, calculate correction reference path ith pass through it is to be measured
The concentration measured after water sample：
IiFor the range value of the acquisition after water sample to be measured, I0-iFor the range value obtained after standard water sample, CiFor
I-th kind of composition and its concentration, L are fixed optical path differences, can obtain concentration to be measured after substituting into the K values tried to achieve, be shown below：
Then C1、C2、…Ci、CnThe concentration of respectively corresponding each component.
Require supplementation with explanation is a bit：Standard water sample is do not contain test substance composition pure or clean transparent
Water body.
Claims (7)
1. a kind of multi-parameter water quality real time on-line monitoring device based on spectroscopic methodology, it is characterised in that：Including hernia lamp source, preposition
Light path, spectrum acquiring unit, quick processing platform and output unit；
Hernia lamp source emergent light is divided into correction reference path and optical path after preposition light path；Correction reference path passes through
Water sample to be measured is incident to spectrum acquiring unit；Optical path is incident to spectrum acquiring unit by standard water sample；Correct reference light
Road and optical path are sent to fast after changing into two groups of curve of spectrum data signals after spectrum acquiring unit is synchronously obtained
Fast processing unit；Fast processing unit is obtained after handling respectively two groups of curve of spectrum data signals to be existed in water sample to be measured
Test substance and test substance concentration after Local or Remote is output to so as to realizing monitoring by output unit；
Fast processing unit is the multi-parameter water-quality Intelligent Processing Platform based on ARM.
2. the multi-parameter water quality real time on-line monitoring device according to claim 1 based on spectroscopic methodology, it is characterised in that：Light
Compose acquiring unit and include the first collimating mirror, it is slit, the first speculum, fibre bundle, grating, the second collimating mirror, detector, second anti-
Penetrate microscope group into；
Reference path is corrected after standard water sample, is led to by the second collimating mirror, in an image planes position of the second collimating mirror
Cross fibre bundle and be sent to slit, then grating is reflexed to by the first speculum, grating is passed through after carrying out dispersion to correction reference path
The reflection of the second speculum is crossed to be received by detector；
Optical path passes through optical fiber after water sample to be measured through the first collimating mirror, in an image planes position of the first collimating mirror
Beam reflexes to grating to slit, then by the first speculum, and grating is carried out after dispersion to water sample light path to be measured by the second reflection
Received after mirror reflection by detector.
3. the multi-parameter water quality real time on-line monitoring device according to claim 2 based on spectroscopic methodology, it is characterised in that：Institute
State hernia light source module hair emergent light spectral coverage include ultraviolet light, visible ray, near infrared light, spectrum be 185nm~
1100nm。
4. the multi-parameter water quality real time on-line monitoring device according to claim 3 based on spectroscopic methodology, it is characterised in that：Institute
Grating is stated for plane grating, concave grating, concave holographic grating or adjustable balzed grating,.
5. the multi-parameter water quality real time on-line monitoring device according to claim 4 based on spectroscopic methodology, it is characterised in that：Institute
Detector is stated for silicon photocell or planar array detector.
6. the multi-parameter water quality real time on-line monitoring device according to claim 5 based on spectroscopic methodology, it is characterised in that：It is defeated
Go out unit to be Network transmission line, be wirelessly transferred or solid-state storage.
7. the multi-parameter water quality real time on-line monitoring device according to claim 6 based on spectroscopic methodology, it is characterised in that：Institute
Stating preposition light path includes imaging lens and collimating mirror.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120692A (en) * | 2018-01-18 | 2018-06-05 | 南通艾森传感技术有限公司 | Portable COD monitors |
| CN110160978A (en) * | 2019-06-18 | 2019-08-23 | 深圳市水务(集团)有限公司 | A kind of detection system and detection method of the comprehensive organoleptic indicator of drinking water |
| CN111562229A (en) * | 2020-04-10 | 2020-08-21 | 中国科学院西安光学精密机械研究所 | Double-light-path absorption spectrum stability measuring system and method for water quality online monitoring |
-
2016
- 2016-12-30 CN CN201621477557.5U patent/CN206583795U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120692A (en) * | 2018-01-18 | 2018-06-05 | 南通艾森传感技术有限公司 | Portable COD monitors |
| CN110160978A (en) * | 2019-06-18 | 2019-08-23 | 深圳市水务(集团)有限公司 | A kind of detection system and detection method of the comprehensive organoleptic indicator of drinking water |
| CN111562229A (en) * | 2020-04-10 | 2020-08-21 | 中国科学院西安光学精密机械研究所 | Double-light-path absorption spectrum stability measuring system and method for water quality online monitoring |
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