CN109115697A - A kind of multi-parameter water-quality on-Line Monitor Device of aggregate optical probe - Google Patents
A kind of multi-parameter water-quality on-Line Monitor Device of aggregate optical probe Download PDFInfo
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- CN109115697A CN109115697A CN201811170739.1A CN201811170739A CN109115697A CN 109115697 A CN109115697 A CN 109115697A CN 201811170739 A CN201811170739 A CN 201811170739A CN 109115697 A CN109115697 A CN 109115697A
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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
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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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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- 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
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
- G01N21/274—Calibration, base line adjustment, drift correction
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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
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The invention discloses a kind of multi-parameter water-quality on-line measuring devices of aggregate optical probe, it includes power supply, wide spectrum water quality probe, physics probe, signal acquisition amplification module, ARM controller, memory, display screen and WIFI module.The wide spectrum water quality probe is made of drive rod, focus lamp, collimating mirror, water sample pond, optical fiber and the photodetector of xenon short-act lamp, prism, the flexible aperture of band.Main thought of the invention embodies are as follows: first is that wide spectrum water quality probe designs, including construction wide spectrum water quality probe, the standard reference data library of wide spectrum water quality probe, the method design of wide spectrum water quality probe detection water quality parameter are established in the spectral line correction of wide spectrum water quality probe；Second is that design monitoring water quality on line single unit system, is integrated with wide spectrum water quality probe and physics probe, finally can obtain testing result from the end mobile phone app.As long as device is placed in water body to be measured, important water quality parameter can in real time, be accurately and conveniently provided.
Description
Technical field
The present invention relates to environmental monitoring technology fields, and in particular to a kind of multi-parameter water-quality of aggregate optical probe is supervised online
Survey device.
Background technique
Water is resource most precious on the earth, is the important substance that the mankind depend on for existence and development.But since the mankind ignore
Environment and greatly develop industrial economy, result in present water pollution problems and get worse.To 21 century, the crisis of water resource
Just displaying gradually.It is reported that the contaminated river in China has reached the 82% of total river number, wherein having 42% is even more to reach
Serious pollution level is arrived.It can be said that the normal life of our people receives the extreme influence of water environmental problems, water pollution is asked
Very urgent stage has been arrived in the solution of topic.
Currently, the instrument and equipment that China carries out online auto monitoring to surface water and sewage quality mostly uses greatly traditional reality
Test room chemical analysis method, the currently employed analytical period is long, generally take tens of minutes it is above, cannot be really real
When real and the purpose of online auto monitoring；Using chemical reagent or even poisonous reagent, it is easy to produce secondary pollution；Separate unit instrument
Device can only generally monitor a parameter, and more instruments must be installed when needing multi-parameter while monitoring, uneconomical；In addition, having
Water quality parameter according to existing standard method can not or online auto monitoring difficult to realize, such as COD, BOD, TOC index.
In this context, real-time, online, quick water quality detection method and technology become the needs of the times.Spectrum
Method water quality inspection technique as a kind of easy to operate, detection novel water quality measurement method rapid, without secondary pollution, meet in real time,
Quick measurement demand in situ, is increasingly becoming the hot spot of modern water quality monitoring technical research.For same water body, need to examine
The parameter of survey has multiple, and traditional measurement needs multiple sensors to be just able to achieve.Moreover, most of online water quality detection equipment
All in the presence of powering, adopting the modules such as water, measurement, display, storage, the cost that the overlapping investment of more equipment detects multi-parameter is corresponding
It is higher.Therefore, wide spectrum multi-parameter water-quality on-Line Monitor Device is developed to be of great significance.
Noun explanation:
COD, that is, COD (Chemical Oxygen Demand).
BOD, that is, biochemical oxygen demand (BOD) (Biochemical Oxygen Demand).
TOC, that is, total organic carbon (Total Organic Carbon).
Summary of the invention
The purpose of the present invention is to provide a kind of multi-parameter water-quality on-Line Monitor Devices of aggregate optical probe, based on soft
The mode that scleroma is closed, it is intended to which solving current water quality monitoring leads to problems such as time-consuming is more, operates slow, precision not know.
To achieve the above object, the present invention provides a kind of aggregate optical probe multi-parameter water-quality on-Line Monitor Device,
Main thought embodies are as follows: first is that the tectonic sieving of wide spectrum water quality probe and initialization, core is that constructing wide spectrum water quality visits
Head, the spectral line correction of wide spectrum water quality probe, the standard reference data library for establishing wide spectrum water quality probe, wide spectrum water quality probe
Detect the method design of water quality parameter；Second is that design monitoring water quality on line single unit system, obtains testing result from the end mobile phone app.
Its technical solution is as follows:
One, the tectonic sieving of wide spectrum water quality probe and initialization
1, construction wide spectrum water quality probe
Wide spectrum water quality is popped one's head in, and hardware construction is as shown in Fig. 1, and all optics and device are in same optical axis.Short arc xenon
Lamp 1 is used as light source, can emit the light of wide spectrum, spatial distribution is similar with sunlight, and the intensity of xenon short-act lamp is adjustable.Prism
2 are able to achieve the dispersion of light, each monochromatic light are separated in the up-down direction, wavelength is successively from long wave to shortwave from top to bottom, trigone
Mirror can rotate and realize the variation of the incident angle of the light of xenon short-act lamp 1.1 telescopic aperture is attached on drive rod 3,
Drive rod can more than can automatically move up and down under program, flexible aperture can also change size under program,
Moving up and down for aperture can allow the light of different spectral coverage to pass through, and the variation of aperture size can control the spectral coverage by light
Broadening width.It is water body to be measured in water sample pond 7, when light passes through the water body, the substance in water body has certain absorption, passes through
The analysis of the spectrum before and after water sample pond is passed through in comparative analysis, may finally obtain the parameters such as COD.
Then, wide spectrum water quality probe overall operation mechanism is as follows: xenon short-act lamp 1 emits wide spectrum light；Through 2 color of prism
The continuous monochromatic light being arranged successively is formed in the up-down direction after dissipating；Under circuit program control, drive rod 3 is moved down upper
Dynamic, orifice size can also change, and allow wavelength in the ultraviolet of 190~800nm, visible light by arriving incident focus lamp 4；By entering
It penetrates focus lamp 4 and is coupled to incident optical 5；The light projected from incident optical 5 has biggish diversity, will be sent out using collimating mirror 6
Scattered light is irradiated on water sample pond 7 after being collimated；In water sample pond, water body as to be measured；After the water body to be measured in water sample pond,
Light is coupled to the output optical fiber 9 by outgoing focus lamp 8；Light finally enters photoelectric detecting system 10, realizes the acquisition of spectrum.
2, the spectral line correction of wide spectrum water quality probe
When being popped one's head in using wide spectrum water quality, the transmitting terminal of spectrum and the device of receiving end in spectral emissions and are received
Relative intensity distribution be not it is constant with spectrum change, xenon short-act lamp 1 has a spectral emissions spectral distribution curve, and light
There is also a spectrum responses for electric explorer 10.For example, xenon short-act lamp is in some transmitting relative intensity spectrally
0.9, and photodetector this spectrally responding ability be 0.8, do not have water sample pond water body absorb before and obtain spectrum
The practical only 0.9 × 0.8=0.72 of intensity, so when the intensity after the absorption of the water body in water sample pond, it is necessary to divided by this
The priori of initial spectral line, realizes the spectrum correction in relative intensity.And light pass through probe system other elements when, also have light
The decaying of spectrum.Therefore, the present invention carries out spectral line correction to the spectrum of entire working range, finally may make entire operation more quasi-
Really and finely.
Spectrum correction curve of the invention is done by way of experimental calibration, and relatively continuous spectrum analysis is formed,
Meet practical calculating requirement, specifically see below design process, this process be demarcate in advance it is ready-made:
Etalon spectrometers 2-1) are utilized, spectral intensity distribution of the xenon short-act lamp 1 in operating wavelength range, normalization are analyzed
Writing down spectrum relative intensity curve is Eλ, it is one-dimensional data, the varying strength that characterization is presented with spectrum change, and short arc xenon
The intensity of lamp is adjustable；
2-2) under 1 working condition of xenon short-act lamp, according to current water quality probe system (without water body in water sample pond), record
The spectrum of photodetector exports, and after 1 comparative analysis of xenon short-act lamp, calculating is obtained to export and normalize and be obtained comprising detector
The spectral response curve of probe system inside is denoted as Tλ。
2-3) intensity for adjusting xenon short-act lamp records the E under the different intensities of light source from weak to being divided into N grades by forceλWith Tλ, will be every
One grade the two, which is multiplied, obtains N group priori spectrum correction curve；
2-4) N group spectrum correction curve correspond to averagely, obtains final spectrum calibration curve.
When formal in use, contain water body to be measured in water sample pond, after obtaining photo detector spectral output at this time, as long as
Spectral line correction can be realized divided by spectrum calibration curve value in corresponding spectrum.
3, the standard reference data library of wide spectrum water quality probe is established
Spectroscopic methodology detection water quality is to need to build standard reference data library well in advance, formal in use, detection is believed
It number compares and calculates acquisition water quality parameter with java standard library.It requires to carry out for index parameters such as COD, TSS, TOC respective
Database sharing, process is the same.Process is as follows:
3-1) first by wide spectrum water quality probe placement in the standard calibration solution of corresponding index parameter, on the one hand record
Corresponding electric signal waveform (i.e. spectral response spectral line) O of photoelectric detecting system outputλ, on the other hand analyze OλMiddle relative intensity is most
Three big spectral line λ1, λ2, λ3, recording the intensity on these three spectral lines is Oλ1, Oλ2, Oλ3, it is set as data group (Oλ1, Oλ2, Oλ3)。
3-2) matching criterion solution and change the concentration of the parameter index of solution, concentration is divided into n grades from small to large.It records
The concentration D of actual index parametern(it is believed that being exactly true index parameter value), has n group, this is normal data；Meanwhile it pressing
According to 3-1), on the one hand obtain corresponding corresponding electric signal waveform (Oλ)n；Meanwhile on the other hand, according to 3-1) obtain n group data
Group (Oλ1, Oλ2, Oλ3)n。
3-3) fitting of data group is corresponding, and n group experimental data is carried out curve fitting.Fitting formula is defined as 2 curves,
DIt calculatesThe index parameter value estimated, k11,k12,k21,k22,k31,k32, b is the coefficient of equation:
Then, D is utilizednWith (Oλ1, Oλ2, Oλ3)nThis n realizes above-mentioned formula to data, using least square fitting mode
Coefficient Fitting obtains best (k11,k12,k21,k22,k31,k32, b) so that DIt calculatesWith DnRelation curve be linear.
Then, the standard reference data library popped one's head in by establishing wide spectrum water quality.Reference database contains two functions
Part, first is that DnWith (Oλ)n, second is that DnWith (k11,k12,k21,k22,k31,k32, b), this corresponding relationship two-by-two.It must be noted that
First is that DnWith (Oλ)nBetween corresponding relationship be it is discrete, for example, D1Corresponding (Oλ)1, D2Corresponding (Oλ)2, but between D1With D2Between
Concentration can not correspond to OλCurve or spectral line value；Second is that DnWith (k11,k12,k21,k22,k31,k32, b) between relationship it is logical
Cross DIt calculatesFormula realize continuous corresponding relationship, i.e., input (Oλ1, Oλ2, Oλ3) it can be obtained DIt calculatesValue, that is, the index parameter estimated
Value.
Finally reference database is stored in the memory of ARM.
4, the method for wide spectrum water quality probe detection water quality parameter
When by wide spectrum water quality probe placement in water sample to be measured, photodetector can export new electric signal waveform Lλ,
And obtain λ1, λ2, λ3Under (Lλ1, Lλ2, Lλ3)。
4-1) use DnWith (Oλ)nBetween corresponding relationship Judging index parameter value range
According to Lambert-Beer theorem, measured matter can be measured to the degree of absorption of light, being reflected on electric signal is output
The difference of waveform.So the original number being stored in matching database by judging " peak " and " paddy " of electric signal output waveform
According to coming the material concentration of auxiliary judgment water sample to be measured, i.e. index parameter value.
The present invention first uses DnWith (Oλ)nBetween corresponding relationship determine the range of index parameter value: by LλCurve and data
(O in libraryλ)nCurve is matched, and a certain curve (O of best match is obtainedλ)j, corresponding DjThat is index parameter value
Approximate range center.
Fit equation 4-2) is utilized, realizes parameter Estimation.
Known (k in database11,k12,k21,k22,k31,k32, b), by (Lλ1, Lλ2, Lλ3) substitute into following equation (following sides
O in journey is L here), obtain DIt calculatesValue:
This is that curve calculates the index parameter value obtained.
Final index parameter value uses DjWith DIt calculatesMean value.
Two, monitoring water quality on line single unit system is designed, and obtains final detection result from the end mobile phone app.
As shown in Fig. 2, power module is the power supply of entire water monitoring device, wide spectrum optic probe and physics probe set
Together, it is immersed in water sample to be measured.Monitored water sample data of popping one's head in are transmitted by the optimization of signal acquisition amplifying circuit
To ARM controller, ARM controller handles the water sample data of wide spectrum water quality probe and physics probe monitors respectively, exports result
It is shown by display screen, the Cloud Server being upload the data to also by WIFI module in internet.User passes through mobile phone
The end APP remotely gets the data of water sample to be measured.
The multi-parameter water-quality on-Line Monitor Device of aggregate optical probe of the invention, is integrated with wide spectrum water quality probe and object
Reason probe, overcoming current water quality monitoring leads to problems such as time-consuming is more, operates slow, precision not know；And it realizes water quality
Testing result real-time Transmission brings great convenience to user to user's use；Meanwhile the device is popped one's head in using wide spectrum water quality
Also avoid the pollution of the chemical agent occurred in traditional monitoring.
Detailed description of the invention
Fig. 1 is wide spectrum water quality sonde configuration figure.
Fig. 2 is apparatus of the present invention frame diagram.
In figure: 1- xenon short-act lamp, 2- prism, 3- drive rod, 4- incidence focus lamp, 5- incident optical, 6- collimating mirror, 7-
Water sample pond, 8- are emitted focus lamp, 9- the output optical fiber, 10- photodetector.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
Implementation of the invention is described further below in conjunction with figure embodiment.
1, the tectonic sieving of wide spectrum water quality probe and initialization
1-1) optical path and system are built
As shown in Figure 1, by xenon short-act lamp 1, prism 2, the drive rod 3 of the flexible aperture of band, incident focus lamp 4, incident light
Fibre 5, collimating mirror 6, water sample pond 7, outgoing focus lamp 8, the output optical fiber 9, photodetector 10 are sequentially placed, and adjustment optical path makes above-mentioned
Device is located in same optical axis.
1-2) the acquisition of spectrum correction curve:
Using etalon spectrometers, spectral intensity distribution of the xenon short-act lamp 1 in operating wavelength range is analyzed, normalization is write down
Spectrum relative intensity curve is Eλ。
Under 1 working condition of xenon short-act lamp, according to current water quality probe system (without water body in water sample pond), photoelectricity is recorded
The spectrum of detector exports, and after 1 comparative analysis of xenon short-act lamp, calculates and obtains output and normalize acquisition comprising including detector
The spectral response curve of probe system be denoted as Tλ。
The intensity of adjustment xenon short-act lamp records the E under the different intensities of light source from weak to being divided into N grades by forceλWith Tλ, by each shelves
The two be multiplied obtain N group priori spectrum correction curve.
N group spectrum correction curve is averaged, final spectrum calibration curve is obtained.
1-3) the foundation in the standard reference data library of wide spectrum water quality probe
Reference database requires to carry out respective database sharing, process is for index parameters such as COD, TSS, TOC
The same.
It, be corresponding to spectrum divided by spectrum calibration curve value, i.e., after obtaining spectrum output signal here by photodetector
Spectral line correction can be achieved.
First on the one hand wide spectrum water quality probe placement is recorded into photoelectricity in the standard calibration solution of corresponding index parameter
Corresponding electric signal waveform (i.e. spectral response spectral line) O of detection system outputλ, on the other hand analyze OλMiddle relative intensity is maximum
Three spectral line λ1, λ2, λ3, recording the intensity on these three spectral lines is Oλ1, Oλ2, Oλ3, it is set as data group (Oλ1, Oλ2, Oλ3)。
Matching criterion solution and the concentration for changing the parameter index of solution, concentration are divided into n grades from small to large.Record reality
Index parameter concentration Dn(it is believed that being exactly true index parameter value), has n group, this is normal data；Meanwhile according to 3-
1) corresponding corresponding electric signal waveform (O, is on the one hand obtainedλ)n；Meanwhile on the other hand, according to 3-1) obtain n group data group
(Oλ1, Oλ2, Oλ3)n。
N group experimental data is carried out curve fitting, D is utilizednWith (Oλ1, Oλ2, Oλ3)nThis n is quasi- using least square to data
Conjunction mode realizes the Coefficient Fitting of following formulas, obtains optimum coefficient (k11,k12,k21,k22,k31,k32, b) so that DIt calculatesWith Dn
Relation curve be linear.
2, the multi-parameter water-quality on-line measuring device of aggregate optical probe is built
Power module is whole device power supply.Signal acquisition amplification module and wide spectrum water quality are popped one's head in and physics probe carries out
Electrical connection, the water quality parameter for acquiring to probe optimize.ARM controller is electrically connected with signal acquisition amplification module,
For handling the specific targets for calculating water quality parameter.ARM controller is also electrically connected with memory, for storing reference data
Library.ARM controller is also electrically connected with display screen, for showing water quality parameter information.ARM controller also with WIFI module into
Row electrical connection, the cloud for water quality parameter upload.Circuit module portion is placed in the cabinet of waterproof, and will probe pass through
Wiring is exposed outside the enclosure.
3, the acquisition of water quality parameter and system are run
Power on, probe is immersed in water sample to be measured, wide spectrum optic probe and physics probe are respectively to water to be measured
Sample is monitored.Other indexs such as data, that is, turbidity of physics probe acquisition.
Wide spectrum optic probe can obtain the index parameters such as COD, TOC.It is defeated that spectrum is obtained here by photodetector
Out after signal, spectral line correction can be realized corresponding to spectrum divided by spectrum calibration curve value.When wide spectrum water quality probe placement in
When surveying in water sample, new electric signal waveform L can be generatedλ.Reference database before ARM starts to call in deposit memory, by Lλ
(O in curve and databaseλ)nCurve is matched, and a certain curve (O of best match is obtainedλ)j, obtain corresponding Dj；Again
Utilize the fitting formula being stored in memory before
To obtain DIt calculates, ARM controller finally calculates DjWith DIt calculatesMean value as final index parameter value.
The data that each probe analysis acquisition calculates are output to display screen together and are shown, will count also by WIFI module
According to the Cloud Server uploaded in internet, the end mobile phone A pp can obtain specific each index parameter by access server.
Claims (6)
1. a kind of multi-parameter water-quality on-Line Monitor Device of aggregate optical probe, including wide spectrum water quality probe, physics probe, electricity
Source module, it is characterised in that: the power module is whole device power supply, and wide spectrum water quality probe and physics probe are integrated into one
It rises, is immersed in water sample to be measured；The wide spectrum water quality probe water sample data monitored with physics probe are put by signal acquisition
It is transferred to ARM controller after big module amplification, ARM controller handles the water of wide spectrum water quality probe and physics probe monitors respectively
Sample data, output result is shown by display screen, and the cloud service in internet is upload the data to by WIFI module
Device；User remotely gets the data of water sample to be measured by cell phone application end.
2. the multi-parameter water-quality on-Line Monitor Device of aggregate optical probe as described in claim 1, it is characterised in that: the width
Spectral water quality probe includes that the xenon short-act lamp (1) being sequentially placed, prism (2), band stretch the drive rod (3), incident poly- of aperture
Burnt mirror (4), incident optical (5), collimating mirror (6), water sample pond (7), outgoing focus lamp (8), the output optical fiber (9), photodetector
(10), adjustment optical path is located at above-mentioned device in same optical axis；Xenon short-act lamp (1) is used as light source, can emit the light of wide spectrum,
Spatial distribution is similar with sunlight, and the intensity of xenon short-act lamp is adjustable；Prism (2) is able to achieve the dispersion of light, and each monochromatic light is existed
It is separated in up and down direction, successively from long wave to shortwave, prism can rotate and realize xenon short-act lamp (1) wavelength from top to bottom
The variation of the incident angle of light；1 telescopic aperture is attached on drive rod (3), drive rod is moved up and down by control automatically,
Flexible aperture changes size by control, and moving up and down for aperture can allow the light of different spectral coverage to pass through, and the change of aperture size
Change the spectral coverage broadening width that can control through light；It is water body to be measured in water sample pond (7), when light passes through the water body, water body
In substance have certain absorption, by comparative analysis by the analysis of the spectrum before and after water sample pond, may finally be referred to
Mark parameter.
3. the multi-parameter water-quality on-Line Monitor Device of aggregate optical probe as claimed in claim 2, it is characterised in that: the drive
Lever (3) moves up and down, orifice size variation, allows wavelength in the ultraviolet of 190~800nm, visible light by gathering to incident
Burnt mirror (4)；Incident optical (5) are coupled to by incident focus lamp (4)；The light projected from incident optical (5) has biggish diverging
Property, it is irradiated to after being collimated the light of diverging using collimating mirror (6) on water sample pond (7)；After the water body to be measured in water sample pond,
Light is coupled to the output optical fiber (9) by outgoing focus lamp (8)；Light finally enters photoelectric detecting system (10), final realization spectrum
Acquisition.
4. the multi-parameter water-quality on-Line Monitor Device of aggregate optical probe as described in claim 1, it is characterised in that: the width
Spectral water quality probe corrects spectrum as follows:
Etalon spectrometers 4-1) are utilized, the spectral intensity distribution of xenon short-act lamp (1) in operating wavelength range, normalization note are analyzed
Lower spectrum relative intensity curve is Eλ, it is one-dimensional data, the varying strength that characterization is presented with spectrum change, and xenon short-act lamp
Intensity it is adjustable；
4-2) under xenon short-act lamp (1) working condition, water quality probe system when according in current water sample pond without water body records light
The spectrum of electric explorer exports, and after xenon short-act lamp (1) comparative analysis, calculating is obtained to export and normalize and be obtained comprising detector
The spectral response curve of probe system inside is denoted as Tλ；
4-3) intensity for adjusting xenon short-act lamp records the E under the different intensities of light source from weak to being divided into N grades by forceλWith Tλ, by each shelves
The two be multiplied obtain N group priori spectrum correction curve；
4-4) N group spectrum correction curve correspond to averagely, obtains final spectrum calibration curve；
In use, include water body to be measured in water sample pond, after obtaining photo detector spectral output at this time, as long as corresponding spectrum divided by
Spectral line correction can be realized in spectrum correction curve values.
5. the multi-parameter water-quality on-Line Monitor Device of aggregate optical probe as claimed in claim 4, it is characterised in that: the width
The standard reference data library building process of spectral water quality probe is as follows:
5-1) first by wide spectrum water quality probe placement in the standard calibration solution of corresponding index parameter, photoelectricity is on the one hand recorded
Corresponding electric signal waveform (i.e. spectral response spectral line) O of detection system outputλ, on the other hand analyze OλMiddle relative intensity is maximum
Three spectral line λ1, λ2, λ3, recording the intensity on these three spectral lines is Oλ1, Oλ2, Oλ3, it is set as data group (Oλ1, Oλ2, Oλ3)；
5-2) matching criterion solution and change the concentration of the parameter index of solution, concentration is divided into n grades from small to large；Record reality
Index parameter concentration Dn, have n group, this is normal data；Meanwhile according to 5-1), on the one hand obtain corresponding corresponding telecommunications
Number waveform (Oλ)n；Meanwhile on the other hand, according to 5-1) obtain n group data group (Oλ1, Oλ2, Oλ3)n；
5-3) fitting of data group is corresponding: n group experimental data is carried out curve fitting；Fitting formula is defined as 2 curves, DIt calculates
The index parameter value estimated, k11,k12,k21,k22,k31,k32, b is the coefficient of equation:
Utilize DnWith (Oλ1, Oλ2, Oλ3)nThis n realizes the Coefficient Fitting of above-mentioned formula using least square fitting mode to data,
Obtain best (k11,k12,k21,k22,k31,k32, b) so that DIt calculatesWith DnRelation curve be linear.
6. the multi-parameter water-quality on-Line Monitor Device of aggregate optical probe as claimed in claim 5, it is characterised in that: by wide light
When composing water quality probe placement in water sample to be measured, photodetector can export electric signal waveform Lλ, and obtain λ1, λ2, λ3Under
(Lλ1, Lλ2, Lλ3), process is as follows:
6-1) use DnWith (Oλ)nBetween corresponding relationship Judging index parameter value range
By Lλ(O in curve and databaseλ)nCurve is matched, and a certain curve (O of best match is obtainedλ)j, correspond to
DjThat is the approximate range center of index parameter value；
Fit equation 6-2) is utilized, realizes parameter Estimation
Known (k in database11,k12,k21,k22,k31,k32, b), by (Lλ1, Lλ2, Lλ3) following equations are substituted into (in following equations
O be L here), obtain DIt calculatesValue:
Final index parameter value uses DjWith DIt calculatesMean value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170739.1A CN109115697A (en) | 2018-09-30 | 2018-09-30 | A kind of multi-parameter water-quality on-Line Monitor Device of aggregate optical probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170739.1A CN109115697A (en) | 2018-09-30 | 2018-09-30 | A kind of multi-parameter water-quality on-Line Monitor Device of aggregate optical probe |
Publications (1)
| Publication Number | Publication Date |
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| CN111060453A (en) * | 2019-12-23 | 2020-04-24 | 江西省水投江河信息技术有限公司 | Multi-parameter water body monitoring device and method |
| CN111272671A (en) * | 2020-02-26 | 2020-06-12 | 上海锆仪电子科技有限公司 | Automatic wavelength selection water quality detection system |
| CN111289452A (en) * | 2020-03-17 | 2020-06-16 | 安吉国千环境科技有限公司 | Split type full-spectrum water quality on-line monitoring device |
| CN114166747A (en) * | 2021-11-29 | 2022-03-11 | 浙江大学 | Discrete three-dimensional fluorescence/visible light absorption spectrum detection device for distinguishing water pollution |
| CN114705649A (en) * | 2022-05-31 | 2022-07-05 | 武汉正元环境科技股份有限公司 | Water quality detection method and device based on ultraviolet spectrum |
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| CN114166747A (en) * | 2021-11-29 | 2022-03-11 | 浙江大学 | Discrete three-dimensional fluorescence/visible light absorption spectrum detection device for distinguishing water pollution |
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