CN106932373A - Total organic carbon optics home position sensing - Google Patents
Total organic carbon optics home position sensing Download PDFInfo
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- CN106932373A CN106932373A CN201710211801.6A CN201710211801A CN106932373A CN 106932373 A CN106932373 A CN 106932373A CN 201710211801 A CN201710211801 A CN 201710211801A CN 106932373 A CN106932373 A CN 106932373A
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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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- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
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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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- 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
- G01N2021/6417—Spectrofluorimetric devices
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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
- G01N2021/6495—Miscellaneous methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/062—LED's
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/066—Modifiable path; multiple paths in one sample
- G01N2201/0668—Multiple paths; optimisable path length
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/126—Microprocessor processing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/12—Circuits of general importance; Signal processing
- G01N2201/127—Calibration; base line adjustment; drift compensation
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The present invention relates to a kind of total organic carbon optics home position sensing, it includes that light source module, reference light detection module, sample cell and scattering light detection module, reflected fluorescent light detection module and signal drive and processing module, light source module provides monochromatic ultraviolet light for TOC detections, reference light detecting module realizes the detection to reference light, seawater light and reflected fluorescent light, signal is driven with processing module as light source module provides drive signal, and the signal that detecting module is obtained is processed；Seawater three-dimensional fluorescence spectrum is obtained by diffraction grating and electron multiplication CCD, and self compensation is carried out to realizing sensor by background optical information and turbidity information, complete the accurate measurement of TOC.The present invention is easy to integrated, achievable high-precision seawater TOC in situ detections without adding chemical reagent.
Description
Technical field
The present invention relates to a kind of detection means, particularly a kind of TOC concentration detection apparatus.
Background technology
Total organic carbon (Total Organic Carbon, TOC) characterizes the summation of contained organic substance in water body, is water body
The important indicator of contaminated with organic substances degree.At present, TOC measurements have been widely applied to rivers, lake and ocean prison
The aspect such as survey, what TOC measurements had become that Water quality in the world controls predominantly detects means.National four ministries and commissions are new within 2003
The charges for disposing pollutants of promulgation are with collecting standard management method, formally listing TOC in water pollutant pollutional equivalent value table.
The detection method of current seawater TOC mainly includes two categories below：The first kind is laboratory classics detection method.Mainly
There is high temperature catalytic combustion oxidation-NDIR to detect (NDIR), wet oxidation (persulfate)-NDIR detection etc.,
The subject matter of these methods is complicated method of testing, and secondary pollution can be caused using chemical reagent, and time of measuring is long, speed is slow
Deng, and these methods be only capable of laboratory complete.Equations of The Second Kind is bank base or boat-carrying online test method, mainly there is spectroscopic methodology, electricity
Resistance method, conductance method, Ozonation, ultrasonic cavitation sonoluminescence method etc., but boat-carrying online measuring technique is by the number of times that goes to sea
Limitation, bank base online measuring technique is only capable of tackling the situation of seashore or estuary.These methods are all difficult to meet oceanographic survey complete
Orientation, three-dimensional, continual monitoring need.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide one kind without add chemical reagent, can automatically determine and
Data processing, the online in situ detection and certainty of measurement total organic carbon optics home position sensing higher that are capable of achieving TOC.
The present invention includes light source module, reference light detection module, sample cell and scattering light detection module, reflected fluorescent light detection
Module and signal drive and processing module.Wherein, the light source module includes LED array and linear adjustable filter array, LED gusts
Light-emitting device is classified as, the linear adjustable filter array of LED array output end connection, linear adjustable filter array exports LED array
Light be filtered into adjustable monochromatic ultraviolet light；
Described reference light detection module includes spectroscope and photo-detector one, and spectroscope is located in above-mentioned adjustable monochromatic light
In the light path of source outgoing, spectroscopical minute surface is in 45° angle with light source exit direction, and reflectivity is 10~30%；Spectroscope can
Monochromatic ultraviolet light is adjusted to be divided into the orthogonal light of two beams, a branch of as detection light, a branch of as reference light, photo-detector one is located at
In reference light light path, and it is in 90 ° of angles with light source exit direction, detectable signal is compensated for reference background light；
Described sample cell and scattering light detection module includes binary transflector mirror, collimater one, sample cell, collimater two
With photo-detector two, after above-mentioned spectroscope, minute surface is in 45° angle with light direction of illumination to wherein binary transflector mirror,
Collimater one and sample cell are sequentially provided with the reflected light light path of binary transflector mirror side, collimater one is in binary transflector mirror
Position and sample cell between is converged in sample cell with ensureing adjustable monochromatic ultraviolet light；Collimater two and photo-detector two are located at
The outer input path lateral location of sample cell, photo-detector two aligns with the collimated light path of collimater two, the detection letter of photo-detector two
Number be used for determining amount；
Described reflected fluorescent light detection module includes collimater three, diffraction grating and electron multiplication CCD, wherein collimater three
With diffraction grating be located at above-mentioned binary transflector mirror opposite side, for collecting the fluorescence being reflected back from sample cell, diffraction grating
To be launched into by the spectrum of wave arrangement, after electron multiplication CCD is located at diffraction grating dispersion by the reflected fluorescent light of collimater three
At the spectral position of formation, the optical signal of fluorescence spectrum is transformed into electric signal；
The output electricity of described reference light detection module, sample cell and scattering light detection module, reflected fluorescent light detection module
Signal by holding wire be connected to signal drive and processing module, signal drive with processing module be with FPGA+DSP as data at
Reason core realizes the functions such as light source driving, each detection module data processing, signal compensation.
The course of work of the invention：The linear adjustable filter array of light that LED array sends exports adjustable monochromatic ultraviolet light,
Obtain detecting light and reference light through spectroscope again；Reference light is used to eliminate bias light interference, and detection light is after binary transflector mirror
It is redirected into sample cell to be radiated in tested seawater, produces transmitted light, reflected fluorescent light and scattering light；Reflected fluorescent light is through diffraction grating
Formed afterwards and electric signal is become by electron multiplication CCD by the spectrum of wave arrangement, the fluorescence for collecting different excitation wavelengths generations can shape
Into three-dimensional fluorescence spectrum, the spectrum realizes TOC by signal driving with reference to background optical information, light turbidity information with processing system
The inside self compensation of sensor, completes TOC measurements.
The present invention has the following advantages that compared with prior art：
1st, detected based on spectrographic technique, without adding chemical reagent；
2nd, equipment is compact, integrated level is high, is capable of achieving original position on-line measurement；
3rd, three-dimensional fluorescence spectrum information is combined with reference to bias light, turbidity information, effectively lifts accuracy of detection.
Brief description of the drawings
Fig. 1 is structure schematic diagram of the invention.
In figure：The linear adjustable filter array of 1-LED arrays, 2-, 3- spectroscopes, 4- binary transflectors mirror, 5- collimaters one,
6- sample cells, 7- collimaters two, 8- collimaters three, 9- diffraction grating, 10- electron multiplication CCD, 11- photo-detector one, 12- light
Detector two, 13- signals drive and processing module, 14- detection light, 15- reference lights.
Specific embodiment
In the total organic carbon optics home position sensing schematic diagram shown in Fig. 1, the LED array 1 in light source module is
Light-emitting device, the linear adjustable filter array 2 of LED array output end connection, the light that linear adjustable filter array exports LED array
It is filtered into adjustable monochromatic ultraviolet light；Spectroscope 3 in reference light detection module is located in above-mentioned adjustable Monochromatic UV sources outgoing
Light path on, spectroscopical minute surface and light source exit direction are in 45° angle, and reflectivity is 10~30%, and spectroscope is by adjustable monochrome
Ultraviolet light is divided into the orthogonal light of two beams, and a branch of as detection 14, a branch of as reference light 15, photo-detector 1 is located at ginseng
Examine in light light path, and be in 90 ° of angles with light source exit direction, detectable signal is compensated for reference background light；Sample cell and scattering light
Binary transflector mirror 4 in detection module is located at after above-mentioned spectroscope, and minute surface is in 45° angle with light direction of illumination, in binary
Be sequentially provided with collimater 1 and sample cell 6 in the reflected light light path of transflector mirror side, collimater one in binary transflector mirror and
Position between sample cell is converged in sample cell with ensureing adjustable monochromatic ultraviolet light；Collimater 27 and photo-detector 2 12
In the outer input path lateral location of sample cell, photo-detector two is alignd with the collimated light path of collimater two, and photo-detector two is detected
Signal is used for determining amount；Collimater 38 and diffraction grating 9 in reflected fluorescent light detection module are located at above-mentioned binary transflector mirror
Opposite side, for collecting the fluorescence being reflected back from sample cell, diffraction grating will be launched into by the reflected fluorescent light of collimater three
By the spectrum of wave arrangement, electron multiplication CCD10 is located at the spectral position formed after diffraction grating dispersion, by fluorescence spectrum
Optical signal is transformed into electric signal；Described reference light detection module, sample cell and scattering light detection module, reflected fluorescent light detection mould
The output electric signal of block is connected to signal and drives and processing module 13 by holding wire, and it is with FPGA that signal is driven with processing module
+ DSP realizes the functions such as light source driving, each detection module data processing, signal compensation for data processing core.
Claims (6)
1. a kind of total organic carbon optics home position sensing, it is characterised in that：It includes light source module, reference light detection mould
Block, sample cell and scattering light detection module, reflected fluorescent light detection module and signal drive and processing module.
2. total organic carbon optics home position sensing according to claim 1, it is characterised in that：The light source module bag
LED array and linear adjustable filter array are included, LED array is light-emitting device, the linear adjustable optical filtering battle array of LED array output end connection
The light that LED array is exported is filtered into adjustable monochromatic ultraviolet light by row, linear adjustable filter array.
3. total organic carbon optics home position sensing according to claim 1, it is characterised in that：Described reference light inspection
Surveying module includes spectroscope and photo-detector one, and spectroscope is located in the light path of above-mentioned adjustable Monochromatic UV sources outgoing, point
The minute surface of light microscopic is in 45° angle with light source exit direction, and reflectivity is 10~30%；Adjustable monochromatic ultraviolet light is divided into two by spectroscope
The orthogonal light of beam, a branch of as detection light, a branch of as reference light, photo-detector one is located in reference light light path, and with
Light source exit direction is in 90 ° of angles, and detectable signal is compensated for reference background light.
4. total organic carbon optics home position sensing according to claim 1, it is characterised in that：Described sample cell and
Scattering light detection module includes binary transflector mirror, collimater one, sample cell, collimater two and photo-detector two, wherein binary
Transflector mirror is located at after above-mentioned spectroscope, and minute surface is in 45° angle with light direction of illumination, in the reflection of binary transflector mirror side
It is sequentially provided with collimater one and sample cell in light light path, position of the collimater one between binary transflector mirror and sample cell is protecting
Adjustable monochromatic ultraviolet light is demonstrate,proved to converge in sample cell；Collimater two and photo-detector two are located at the outer input path side position of sample cell
Put, photo-detector two aligns with the collimated light path of collimater two, the detectable signal of photo-detector two is used for determining amount.
5. total organic carbon optics home position sensing according to claim 1, it is characterised in that：Described reflected fluorescent light
Detection module includes collimater three, diffraction grating and electron multiplication CCD, and wherein collimater three and diffraction grating is located at above-mentioned binary
The opposite side of transflector mirror, for collecting the fluorescence being reflected back from sample cell, diffraction grating will be glimmering by the reflection of collimater three
Light is launched into by the spectrum of wave arrangement, and electron multiplication CCD is located at the spectral position formed after diffraction grating dispersion, by fluorescence
The optical signal of spectrum is transformed into electric signal.
6. total organic carbon optics home position sensing according to claim 1, it is characterised in that：Described reference light inspection
Survey module, sample cell and scattering light detection module, the output electric signal of reflected fluorescent light detection module and letter is connected to by holding wire
Number drive and processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710211801.6A CN106932373B (en) | 2017-04-01 | 2017-04-01 | Seawater total organic carbon optical in-situ sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710211801.6A CN106932373B (en) | 2017-04-01 | 2017-04-01 | Seawater total organic carbon optical in-situ sensor |
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| Publication Number | Publication Date |
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| CN106932373A true CN106932373A (en) | 2017-07-07 |
| CN106932373B CN106932373B (en) | 2023-09-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279225A (en) * | 2018-02-09 | 2018-07-13 | 秦皇岛红燕光电科技有限公司 | Phytoplankton ＆ Suspension red tide and its toxicity detection optics home position sensing |
| CN109655110A (en) * | 2019-01-02 | 2019-04-19 | 南京大学 | Composite package LED light source and water monitoring device based on the light source |
| CN111175260A (en) * | 2020-01-07 | 2020-05-19 | 燕山大学 | Ocean TOC sensor based on ultraviolet three-dimensional fluorescence and using method |
| CN113933242A (en) * | 2021-09-16 | 2022-01-14 | 燕山大学 | Multi-source spectrum total organic carbon in-situ sensor optical path structure and application method thereof |
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| CN109655110A (en) * | 2019-01-02 | 2019-04-19 | 南京大学 | Composite package LED light source and water monitoring device based on the light source |
| CN111175260A (en) * | 2020-01-07 | 2020-05-19 | 燕山大学 | Ocean TOC sensor based on ultraviolet three-dimensional fluorescence and using method |
| CN113933242A (en) * | 2021-09-16 | 2022-01-14 | 燕山大学 | Multi-source spectrum total organic carbon in-situ sensor optical path structure and application method thereof |
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