CN107179285A - Water quality monitoring probe and method based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum - Google Patents
Water quality monitoring probe and method based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000012544 monitoring process Methods 0.000 title claims abstract description 62
- 239000000523 sample Substances 0.000 title claims abstract description 49
- 238000002189 fluorescence spectrum Methods 0.000 title claims abstract description 16
- 238000004847 absorption spectroscopy Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 6
- 230000003595 spectral effect Effects 0.000 claims abstract description 58
- 238000005259 measurement Methods 0.000 claims abstract description 45
- 230000005284 excitation Effects 0.000 claims abstract description 34
- 239000013307 optical fiber Substances 0.000 claims abstract description 30
- 238000004611 spectroscopical analysis Methods 0.000 claims abstract description 5
- 238000001228 spectrum Methods 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 9
- 230000004397 blinking Effects 0.000 claims description 6
- 238000000691 measurement method Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000000695 excitation spectrum Methods 0.000 claims description 3
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000002835 absorbance Methods 0.000 abstract description 8
- 238000002371 ultraviolet--visible spectrum Methods 0.000 abstract description 7
- 238000004458 analytical method Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 description 7
- 238000000862 absorption spectrum Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000012937 correction Methods 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000005416 organic matter Substances 0.000 description 4
- 230000008033 biological extinction Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002795 fluorescence method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229930002868 chlorophyll a Natural products 0.000 description 1
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000000513 principal component analysis Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 238000004457 water analysis Methods 0.000 description 1
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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
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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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
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Abstract
The present invention relates to a kind of water quality monitoring probe based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum, it includes flashing lamp, the first convex lens, the first water quality monitoring window, the second water quality monitoring window, fluorescence excitation multiple wavelength laser light source, the 3rd water quality monitoring window, chopper, convex lens, UV, visible light optical fiber spectral measurement device, controller signals processor, flashing lamp controller, fluorescence excitation multiple wavelength laser light source controller, stepper motor；The present invention is scanned using continuous uv-vis spectra area to water sample, obtain the absorbance information in continuous water quality, the parameters in water quality are obtained by the analysis means of diversification, by calculating the water body speciality information included in each data, and the calibration model of spectroscopic data and water quality parameter between the two is set up according to data above, realize that water quality parameter is analyzed by instrument of this model.
Description
Technical field
The present invention relates to water quality monitoring equipment technical field, and in particular to one kind is based on ultraviolet-visible absorption spectroscopy and fluorescence
The water quality monitoring probe and method of spectrum.
Background technology
Singly probe, without wavelength calibration, causes spectral measurement drift easily occur existing for the multi-parameter water-quality monitoring used at present
As, and then cause water quality parameter measurement result unstable, there is drift phenomenon.Meanwhile, spectrometer resolution ratio is low used in it, no
Beneficial to water quality parameter analysis, in addition, the probe used at present is measured based on absorption spectrum, occasion error is measured for low concentration
Greatly.
The content of the invention
It is an object of the invention to provide a kind of water quality monitoring probe based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum
And method, the probe can significantly improve the precision of water quality monitoring.
In order to solve the above technical problems, the water quality based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum designed by the present invention
Monitoring probe, it includes flashing lamp, the first convex lens, the first water quality monitoring window, the second water quality monitoring window, fluorescence excitation and used
Multiple wavelength laser light source, the 3rd water quality monitoring window, chopper, convex lens, UV, visible light optical fiber spectral measurement device, controller letter
Number processor, flashing lamp controller, fluorescence excitation multiple wavelength laser light source controller, stepper motor, wherein, the controller
The flashing lamp control instruction output end of signal processor connects the signal input part of flashing lamp controller, the control of flashing lamp controller
Signal output part processed connects the control signal input of flashing lamp, the fluorescence excitation multiwavelength laser of controller signals processor
Light source control instruction output end connects the signal input part of fluorescence excitation multiple wavelength laser light source controller, and fluorescence excitation is used many
The control signal input of the control signal output connection fluorescence excitation multiple wavelength laser light source of wavelength laser source controller
End, the optical signal input for optical signal the first convex lens of correspondence that flashing lamp is sent, the first convex lens output two route parallel beams,
The first via light velocity of first convex lens output, which can be irradiated to through the first water quality monitoring window on water sample to be measured, to be occurred to absorb, scatters
Afterwards through the second water quality monitoring window transmission to chopper, the second road light velocity of the first convex lens output is reference path, reference
Light path is directly transmitted through chopper, and chopper rotates and will transmit through the two-beam modulation come, quilt under the drive of stepper motor
The light beam of modulation, planoconvex lens convergence is irradiated at the fiber entrance of UV, visible light optical fiber spectral measurement device, at controller signals
The spectroscopic acquisition end for managing device connects the spectral measurement information output of UV, visible light optical fiber spectral measurement device.
A kind of water quality UV, visible light continuous absorption spectral measurement method popped one's head in using above-mentioned water quality monitoring, its feature is existed
In it comprises the following steps：
Step 1：Controller signals processor sends flashing lamp control instruction to flashing lamp controller, flashing lamp controller control
Flashing lamp processed sends ultraviolet-visible with default frequency and default blinking intervals；
Step 2：The ultraviolet-visible that flashing lamp is sent is converted to the first collimated light beam, first after being converged through the first convex lens
The first via light velocity of convex lens output is irradiated on water sample to be measured after generation absorption, scattering through the first water quality monitoring window and passed through
Second water quality monitoring window transmission is to chopper, and the second road light velocity of the first convex lens output is reference path, and reference path is straight
Connect and be transmitted through chopper, chopper rotates and will transmit through the two-beam modulation come under the drive of stepper motor；
Step 3：The light beam modulated, planoconvex lens converges the fiber entrance for being irradiated to UV, visible light optical fiber spectral measurement device
Place, UV, visible light optical fiber spectral measurement device carries out spectral measurement to input by modulation light beam, and controller signals processor is realized
The collection of spectral signal.
A kind of fluorescence excitation spectrum measuring method popped one's head in using above-mentioned water quality monitoring, it is characterised in that it includes as follows
Step：
Step 101：Controller signals processor sends fluorescence excitation multiple wavelength laser light source control instruction and swashed to fluorescence
Hair multiple wavelength laser light source controller, fluorescence excitation controls fluorescence excitation multi-wavelength to swash with multiple wavelength laser light source controller
Radiant sends the laser at predeterminated frequency and interval, should be at intervals of the time interval that last time is luminous and this is between lighting；
Step 102：The water quality monitoring window of laser light the 3rd that above-mentioned fluorescence excitation is sent with multiple wavelength laser light source shines
Penetrate on water sample to be measured, excite generation fluorescence；
Step 103：Step 102 excites generation fluorescence through the second water quality monitoring window transmission to chopper, and chopper exists
Rotate and will transmit through to carry out fluorescence and be modulated by luminous frequency under the drive of stepper motor；
Step 104：The fluorescence modulated, the optical fiber that planoconvex lens convergence is irradiated to UV, visible light optical fiber spectral measurement device enters
At mouthful, UV, visible light optical fiber spectral measurement device carries out spectral measurement to input by modulation light beam, and controller signals processor is real
The collection of existing spectral signal.
A kind of wavelength calibration multiwavelength laser spectral measurement method popped one's head in using above-mentioned water quality monitoring, its feature is existed
In it comprises the following steps：
Step 1001：Controller signals processor sends wavelength calibration multiple wavelength laser light source control instruction and gives wavelength school
Positive to use multiple wavelength laser light source controller, wavelength calibration controls wavelength calibration multi-wavelength to swash with multiple wavelength laser light source controller
Radiant sends the wavelength calibration multiwavelength laser of predeterminated frequency and default blinking intervals；
Step 1002：Above-mentioned wavelength calibration is converted to the second directional light after being converged with multiwavelength laser through the first convex lens
Beam, the second collimated light beam is irradiated on water sample to be measured through the first water quality monitoring window to be occurred after absorption, scattering through the second water
Quality supervision surveys window transmission to chopper, and chopper rotates and will transmit through under the drive of stepper motor the wavelength calibration come and uses many
Wavelength laser is modulated by glow frequency；
Step 1003：The wavelength calibration multiwavelength laser modulated, planoconvex lens convergence is irradiated to UV, visible light optical fiber
At the fiber entrance of spectral measurement device, UV, visible light optical fiber spectral measurement device carries out spectral measurement to input by modulation light beam,
Controller signals processor realizes the collection of spectral signal, and according to its response spectrum, it is determined that probe unit position is corresponded to, and then
Realize correction.
The present invention provide it is a kind of have it is wavelength self-correcting function, bifocal path structure based on ultraviolet-visible absorption spectroscopy and
The multi-parameter water-quality on-line real time monitoring of fluorescence spectrum combination is popped one's head in single.
Direct ultraviolet-visible continuous spectrum realizes water quality monitoring as a kind of detection means of relative new, with need not
Chemical reagent, non-secondary pollution, analyze speed are fast, real-time online, cost is low, the advantages of measuring multiple parameters can be achieved.
The present invention is scanned using continuous uv-vis spectra area to water sample, obtains the absorbance in continuous water quality
Information, water is obtained by the analysis means of the diversification such as wavelength calibration, wavelet packet denoising, multiplicative scatter correction, principal component analysis
The water quality parameters such as COD, BOD5, TOC, NO3-N, NO2-N, colourity, turbidity, chlorophyll a in matter, by calculating each data
Included in water body speciality information, and the straightening die of spectroscopic data and water quality parameter between the two is set up according to data above
Type, realizes that water quality parameter is analyzed by instrument of this model.Continuous uv-vis spectra detection method is continuously visible due to adding water quality
Optical absorbance, other factorses when water quality parameter modeling resolving is greatly lowered by full spectral information are disturbed, and can be effectively reduced
Scattering interference, carries out pretreatment to the spectral information collected by algorithm and reduces influence of the turbidity to water quality parameter.
Measuring beam spectrum includes absorption information and the shadow of the intensity of light source of the detected water sample to measuring beam in the present invention
Ring, and reference beam spectrum is only influenceed by the intensity of light source, measuring beam spectrum is combined with reference beam spectrum can eliminate light source
Influence of the intensity to water quality measurement.Langbobier law is obeyed in absorption of the water sample to spectrum.Uv-vis spectra detection method is profit
Water sample is scanned with continuous uv-vis spectra area, so as to obtain the absorbance information in continuous water quality, recycled
Information fusion technology is resolved to water quality parameter.
Meanwhile, object passes through the illumination of shorter wavelength, and energy storage is got up, then the slow light for releasing longer wavelength,
This light released just is fluorescence.If the energy of fluorescence is come out with wavelength relationship figure, then this graph of a relation is exactly glimmering
Light spectrum.High intensity laser beam can make a considerable amount of molecule liftings in absorbing material arrive excitation quantum state.Therefore greatly carry
The high sensitivity of fluorescence spectrum.It is applied to the detection of super low concentration sample as the fluorescence spectrum of light source using laser, than with common
The maximum sensitivity that light source is obtained is significantly improved.Fluorescence method is that fluorescence can occur for most of organic matters according to present in water
Feature, water quality organic matter overall target is determined by the analysis of fluorescence spectrum.
In addition, wavelength calibration is used for carrying out wavelength school to UV, visible light optical fiber spectral measurement module with multiwavelength laser spectrum
Just, to eliminate the influence caused by environmental factor.
Brief description of the drawings
Fig. 1 is structured flowchart of the invention；
Fig. 2 is the detection principle diagram of langbobier law；
Fig. 3 absorbs figure for the water sample of UV, visible light continuous spectrum；
In Fig. 3, COD COD (Chemical Oxygen Demand) is chemically to measure to need in water sample
The amount of oxidized reducing substances.BOD (Biochemical Oxygen Demand's writes a Chinese character in simplified form)：Biochemical oxygen demand (BOD) or biochemistry
Oxygen demand (refers generally to biochemical oxygen demand on the five), represents that a synthesis of the aerobic pollution matter contents such as Organic substance in water refers to
Mark.Total Organic Carbon(TOC)：Under 900 DEG C of high temperature, catalyst is made with platinum, makes water sample oxidizing fire, gas is determined
CO2 increment in body, so that it is determined that phosphorus content total in water sample, represents the overall target of total amount of organic in water sample.Due to TOC
Measure use high-temp combustion, therefore organic matter can all be aoxidized, it more can directly represent the total of organic matter than BOD or COD
Amount.Therefore often it is used to evaluate the degree of Organic Pollution in water body.
Wherein, 1-flashing lamp, 2-wavelength calibration multiple wavelength laser light source, the 3-the first convex lens, the 4-the first water quality
Monitor window, 5-water sample to be measured, the 6-the second water quality monitoring window, 7-reference path, 8-fluorescence excitation multiwavelength laser
Light source, the 9-the three water quality monitoring window, 10-chopper, 11-stepper motor, 12-convex lens, 13-UV, visible light optical fiber
Spectral measurement device, 14-controller signals processor, 15-flashing lamp controller, 16-fluorescence excitation multiple wavelength laser light source
Controller, 17-controllor for step-by-step motor, 18-wavelength calibration multiple wavelength laser light source controller.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
A kind of water quality monitoring probe based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum, as shown in figure 1, it includes flicker
Lamp 1, the first convex lens 3, the first water quality monitoring window 4, the second water quality monitoring window 6, fluorescence excitation multiple wavelength laser light source
8th, the 3rd water quality monitoring window 9, chopper 10, convex lens 12, UV, visible light optical fiber spectral measurement device 13, controller signals processing
Device 14, flashing lamp controller 15, fluorescence excitation multiple wavelength laser light source controller 16, stepper motor 11, wherein, the control
The flashing lamp control instruction output end of device signal processor 14 connects the signal input part of flashing lamp controller 15, flashing lamp control
The control signal output of device 15 connects the control signal input of flashing lamp 1, the fluorescence excitation of controller signals processor 14
The signal for connecting fluorescence excitation multiple wavelength laser light source controller 16 with multiple wavelength laser light source control instruction output end is inputted
End, fluorescence excitation connects fluorescence excitation multiwavelength laser light with the control signal output of multiple wavelength laser light source controller 16
The control signal input in source 8, the optical signal input for optical signal the first convex lens 3 of correspondence that flashing lamp 1 is sent, the first convex lens
Mirror 3 exports two route parallel beams, and the first via light velocity of the first convex lens 3 output can be irradiated to through the first water quality monitoring window 4
Chopper 10 is transmitted through through the second water quality monitoring window 6 after absorption, scattering occur on water sample 5 to be measured, the first convex lens 3 are exported
The second road light velocity be reference path 7, reference path 7 is directly transmitted through chopper 10, band of the chopper 10 in stepper motor 11
The two-beam modulation come is rotated and will transmit through under dynamic, and the light beam modulated, the convergence of planoconvex lens 12 is irradiated to ultraviolet-visible
At the fiber entrance of fine spectral measurement device 13, the spectroscopic acquisition end connection UV, visible light optical fiber of controller signals processor 14
The spectral measurement information output of spectral measurement device 13.Shown controller signals processor 14 realizes results of spectral measurements and water quality
Mapping between measurement parameter.
In above-mentioned technical proposal, it also includes the controllor for step-by-step motor 17 that control stepper motor 11 works, the control
The step motor control instruction output end of device signal processor 14 connects the signal input part of controllor for step-by-step motor 17, stepping electricity
The control signal output of machine controller 17 connects the control signal input of stepper motor 11.
In above-mentioned technical proposal, it also includes wavelength calibration and swashed with multiple wavelength laser light source 2 and wavelength calibration multi-wavelength
Radiant controller 18, the wavelength calibration multiple wavelength laser light source control instruction output end of the controller signals processor 14
Connect the signal input part of wavelength calibration multiple wavelength laser light source controller 18, wavelength calibration multiple wavelength laser light source control
The control signal output of device 18 connects the control signal input of wavelength calibration multiple wavelength laser light source 2, and wavelength calibration is used
The optical signal input for laser signal the first convex lens 3 of correspondence that multiple wavelength laser light source 2 is sent.
In above-mentioned technical proposal, the flashing lamp 1 is flicker xenon lamp.Flicker xenon lamp is used to send ultraviolet-visible.
The present invention in the course of the work, ensures that UV, visible light optical fiber spectrum is surveyed under the control of controller signals processor 14
The spectrum that measuring device 13 is measured is measuring beam spectrum, reference beam spectrum, fluorescence spectrum, wavelength calibration multiwavelength laser spectrum
One of, do not overlap.
The present invention is less than 1nm online water analysis spectrum using Measurement Resolution.
A kind of water quality UV, visible light continuous absorption spectral measurement method popped one's head in using above-mentioned water quality monitoring, it includes as follows
Step：
Step 1：Controller signals processor 14 sends flashing lamp control instruction to flashing lamp controller 15, flashing lamp control
Device 15 controls flashing lamp 1 with default frequency (0.00167~0.067Hz) and default blinking intervals (adjusting range 15 seconds to 10
Minute) send ultraviolet-visible；
Step 2：The ultraviolet-visible that flashing lamp 1 is sent is converted to the first collimated light beam after being converged through the first convex lens 3, the
The first via light velocity of one convex lens 3 output is irradiated on water sample 5 to be measured through the first water quality monitoring window 4 to be occurred to absorb, scatters
Chopper 10 is transmitted through through the second water quality monitoring window 6 afterwards, the second road light velocity of the first convex lens 3 output is reference path 7,
Reference path 7 is directly transmitted through chopper 10, and chopper 10 rotates and will transmit through two come under the drive of stepper motor 11
Beam light modulation；
Step 3：The light beam modulated, planoconvex lens 12 converges the optical fiber for being irradiated to UV, visible light optical fiber spectral measurement device 13
Porch, what 13 pairs of UV, visible light optical fiber spectral measurement device was inputted carries out light by modulation light beam (UV, visible light continuous absorption spectrum)
Spectrometry, controller signals processor 14 realizes that the collection of spectral signal (obtains absorption spectrum, passes through the place to absorption spectrum
Reason obtains corresponding water quality parameter).
A kind of fluorescence excitation spectrum measuring method popped one's head in using above-mentioned water quality monitoring, it comprises the following steps：
Step 101：Controller signals processor 14 sends fluorescence excitation multiple wavelength laser light source control instruction to fluorescence
Excite and use multiple wavelength laser light source controller 16, fluorescence excitation uses many with the control fluorescence excitation of multiple wavelength laser light source controller 16
Wavelength laser source 8 sends predeterminated frequency (0.00167~0.067Hz) and interval (lighted at intervals of last time and lights it with this
Between time interval, adjusting range 15 seconds to 10 minutes) laser；
Step 102：The water quality monitoring window 9 of laser light the 3rd that above-mentioned fluorescence excitation multiple wavelength laser light source 8 is sent
It is radiated on water sample 5 to be measured, excites generation fluorescence；
Step 103：Step 102 excites generation fluorescence to be transmitted through chopper 10, chopper through the second water quality monitoring window 6
10 rotate and will transmit through to carry out fluorescence and be modulated by luminous frequency under the drive of stepper motor 11；
Step 104：The fluorescence modulated, planoconvex lens 12 converges the light for being irradiated to UV, visible light optical fiber spectral measurement device 13
Fine porch, what 13 pairs of UV, visible light optical fiber spectral measurement device was inputted is carried out at spectral measurement, controller signals by modulation light beam
Reason device 14 realizes the collection of spectral signal.
In above-mentioned technical proposal, fluorescence method is the characteristics of fluorescence can occur for most of organic matters according to present in water, is led to
The analysis of fluorescence spectrum is crossed to determine water quality organic matter overall target.
A kind of wavelength calibration multiwavelength laser spectral measurement method popped one's head in using above-mentioned water quality monitoring, its feature is existed
In it comprises the following steps：
Step 1001：Controller signals processor 14 sends wavelength calibration multiple wavelength laser light source control instruction to wavelength
Correction multiple wavelength laser light source controller 18, wavelength calibration uses many with the control wavelength calibration of multiple wavelength laser light source controller 18
Wavelength laser source 2 sends predeterminated frequency (0.00167~0.067Hz) and default blinking intervals (adjusting range 15 seconds to 10 points
Clock) wavelength calibration multiwavelength laser；
Step 1002：Above-mentioned wavelength calibration is converted to the second directional light after being converged with multiwavelength laser through the first convex lens 3
Beam, the second collimated light beam is irradiated on water sample 5 to be measured through the first water quality monitoring window 4 to be occurred after absorption, scattering through second
Water quality monitoring window 6 is transmitted through chopper 10, and chopper 10 rotates and will transmit through the ripple come under the drive of stepper motor 11
Long correction is modulated with multiwavelength laser by glow frequency；
Step 1003：The wavelength calibration multiwavelength laser modulated, the convergence of planoconvex lens 12 is irradiated to ultraviolet-visible
At the fiber entrance of fine spectral measurement device 13, what 13 pairs of UV, visible light optical fiber spectral measurement device was inputted carries out spectrum by modulation light beam
Measurement, controller signals processor 14 realizes the collection of spectral signal, and according to its response spectrum, it is determined that correspondence probe unit
(the several wavelength selected are responded in those probe units), and then realize correction.
The present invention is detected using the direct absorption spectrum to water sample of ultraviolet visible spectrometry water quality detection, analyzed, phase
Than in other on-line checking modes, with without chemical reagent, non-secondary pollution, to be not required to sample pretreatment, detecting system relative
Simply, the advantages of measurement period is short.
Water sample is to the absorption of spectrum according to langbobier law, and Cleaning Principle is as shown in Figure 2
Absorbance
In formula：IoFor incident intensity, I is that incident light passes through the transmitted intensity after water sample to be measured；A is the extinction of water sample
Degree；C is water sample concentration to be measured；D is light path, i.e. optical window length；K is the absorbed proportionality coefficient of light；T is transmittance, i.e.,
The ratio between transmitted intensity and incident intensity.
The important precondition of absorbance measuring is that material can absorb ultraviolet visible light.When concentration uses molar concentration
When, k is molar absorption coefficient；It is relevant with the property of absorbing material and the wavelength X of incident light.When a branch of collimated monochromatic ligth is vertical
During by the extinction material of a certain uniform non-scatter, its absorbance A is directly proportional to the concentration c and absorber thickness d of extinction material.
The water sample of UV, visible light continuous spectrum absorbs such as Fig. 3：
Uv-vis spectra detection method is that water sample is scanned using continuous uv-vis spectra area, so as to be connected
Absorbance information in continuous water quality, other factorses when water quality parameter modeling resolving is greatly lowered by full spectral information are done
Disturb, effectively reduce scattering interference；Pretreatment is carried out to the spectral information collected by algorithm and reduces turbidity to water quality parameter
Influence；Information fusion technology is recycled to reach parameters precision interacting between water quality parameter progress resolving reduction parameter
Requirements at the higher level.The calibration model of spectroscopic data and water quality parameter between the two is set up according to data above, using this model as instrument
Make a concrete analysis of water quality parameter.
The content that this specification is not described in detail belongs to prior art known to professional and technical personnel in the field.
Claims (7)
1. a kind of water quality monitoring probe based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum, it is characterised in that：It includes flicker
Lamp (1), the first convex lens (3), the first water quality monitoring window (4), the second water quality monitoring window (6), fluorescence excitation multi-wavelength
LASER Light Source (8), the 3rd water quality monitoring window (9), chopper (10), convex lens (12), UV, visible light optical fiber spectral measurement device
(13), controller signals processor (14), flashing lamp controller (15), fluorescence excitation multiple wavelength laser light source controller
(16), stepper motor (11), wherein, the flashing lamp control instruction output end connection flicker of the controller signals processor (14)
The signal input part of lamp controller (15), the control of the control signal output connection flashing lamp (1) of flashing lamp controller (15)
Signal input part, the fluorescence excitation of controller signals processor (14) connects glimmering with multiple wavelength laser light source control instruction output end
Light excites the signal input part with multiple wavelength laser light source controller (16), fluorescence excitation multiple wavelength laser light source controller
(16) control signal input of control signal output connection fluorescence excitation multiple wavelength laser light source (8), flashing lamp (1)
The optical signal input of optical signal the first convex lens of correspondence (3) sent, the first convex lens (3) output two route parallel beams, the
The first via light velocity of one convex lens (3) output can be irradiated on water sample to be measured (5) through the first water quality monitoring window (4) to be inhaled
After receipts, scattering chopper (10), the second road light of the first convex lens (3) output are transmitted through through the second water quality monitoring window (6)
Speed is reference path (7), and reference path (7) is directly transmitted through chopper (10), band of the chopper (10) in stepper motor (11)
The two-beam modulation come is rotated and will transmit through under dynamic, and the light beam modulated, planoconvex lens (12) convergence is irradiated to UV, visible light
At the fiber entrance of fiber spectrum measuring appliance (13), the spectroscopic acquisition end connection of controller signals processor (14) is ultraviolet can
See the spectral measurement information output of fiber spectrum measuring appliance (13).
2. the water quality monitoring probe according to claim 1 based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum, its feature
It is：It also includes the controllor for step-by-step motor (17) of control stepper motor (11) work, the controller signals processor
(14) signal input part of step motor control instruction output end connection controllor for step-by-step motor (17), controllor for step-by-step motor
(17) control signal input of control signal output connection stepper motor (11).
3. the water quality monitoring probe according to claim 1 based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum, its feature
It is：It also includes wavelength calibration multiple wavelength laser light source (2) and wavelength calibration multiple wavelength laser light source controller (18),
The wavelength calibration of the controller signals processor (14) connects wavelength calibration with multiple wavelength laser light source control instruction output end
With the signal input part of multiple wavelength laser light source controller (18), the control of wavelength calibration multiple wavelength laser light source controller (18)
The control signal input of signal output part connection wavelength calibration multiple wavelength laser light source (2) processed, wavelength calibration multi-wavelength
The optical signal input for laser signal the first convex lens of correspondence (3) that LASER Light Source (2) is sent.
4. the water quality monitoring probe according to claim 1 based on ultraviolet-visible absorption spectroscopy and fluorescence spectrum, its feature
It is：The flashing lamp (1) is flicker xenon lamp.
5. the water quality UV, visible light continuous absorption spectral measurement method that water quality monitoring described in a kind of utilization claim 1 is popped one's head in, its
It is characterised by, it comprises the following steps：
Step 1：Controller signals processor (14) sends flashing lamp control instruction and gives flashing lamp controller (15), flashing lamp control
Device (15) control flashing lamp (1) sends ultraviolet-visible with default frequency and default blinking intervals；
Step 2：The ultraviolet-visible that flashing lamp (1) is sent is converted to the first collimated light beam after being converged through the first convex lens (3), the
The first via light velocity of one convex lens (3) output is irradiated on water sample to be measured (5) through the first water quality monitoring window (4) to be inhaled
After receipts, scattering chopper (10), the second road light of the first convex lens (3) output are transmitted through through the second water quality monitoring window (6)
Speed is reference path (7), and reference path (7) is directly transmitted through chopper (10), band of the chopper (10) in stepper motor (11)
The two-beam modulation come is rotated and will transmit through under dynamic；
Step 3：The light beam modulated, planoconvex lens (12) converges the optical fiber for being irradiated to UV, visible light optical fiber spectral measurement device (13)
Porch, UV, visible light optical fiber spectral measurement device (13) is carried out at spectral measurement, controller signals to input by modulation light beam
Reason device (14) realizes the collection of spectral signal.
6. the fluorescence excitation spectrum measuring method that water quality monitoring described in a kind of utilization claim 1 is popped one's head in, it is characterised in that it is wrapped
Include following steps：
Step 101：Controller signals processor (14) sends fluorescence excitation multiple wavelength laser light source control instruction and swashed to fluorescence
Hair multiple wavelength laser light source controller (16), fluorescence excitation is used with multiple wavelength laser light source controller (16) control fluorescence excitation
Multiple wavelength laser light source (8) sends the laser at predeterminated frequency and interval, should at intervals of last time it is luminous with this light between when
Between be spaced；
Step 102：The water quality monitoring window (9) of laser light the 3rd that above-mentioned fluorescence excitation is sent with multiple wavelength laser light source (8)
It is radiated on water sample to be measured (5), excites generation fluorescence；
Step 103：Step 102 excites generation fluorescence to be transmitted through chopper (10), chopper through the second water quality monitoring window (6)
(10) rotate and will transmit through to carry out fluorescence and be modulated by luminous frequency under the drive of stepper motor (11)；
Step 104：The fluorescence modulated, planoconvex lens (12) converges the light for being irradiated to UV, visible light optical fiber spectral measurement device (13)
Fine porch, UV, visible light optical fiber spectral measurement device (13) carries out spectral measurement, controller signals to input by modulation light beam
Processor (14) realizes the collection of spectral signal.
7. the wavelength calibration multiwavelength laser spectral measurement method that water quality monitoring described in a kind of utilization claim 3 is popped one's head in, its
It is characterised by, it comprises the following steps：
Step 1001：Controller signals processor (14) sends wavelength calibration multiple wavelength laser light source control instruction and gives wavelength school
Positive to use multiple wavelength laser light source controller (18), wavelength calibration is used with multiple wavelength laser light source controller (18) control wavelength calibration
Multiple wavelength laser light source (2) sends the wavelength calibration multiwavelength laser of predeterminated frequency and default blinking intervals；
Step 1002：Above-mentioned wavelength calibration is converted to the second collimated light beam after being converged with multiwavelength laser through the first convex lens (3),
Second collimated light beam is irradiated on water sample to be measured (5) through the first water quality monitoring window (4) to be occurred after absorption, scattering through second
Water quality monitoring window (6) is transmitted through chopper (10), and chopper (10) rotates under the drive of stepper motor (11) and will transmission
The wavelength calibration come over is modulated with multiwavelength laser by glow frequency；
Step 1003：The wavelength calibration multiwavelength laser modulated, planoconvex lens (12) convergence is irradiated to UV, visible light optical fiber
At the fiber entrance of spectral measurement device (13), UV, visible light optical fiber spectral measurement device (13) carries out light to input by modulation light beam
Spectrometry, controller signals processor (14) realizes the collection of spectral signal.
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