CN104198388A - Online water quality monitoring device based on composite spectrum measurement - Google Patents
Online water quality monitoring device based on composite spectrum measurement Download PDFInfo
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- CN104198388A CN104198388A CN201410468545.5A CN201410468545A CN104198388A CN 104198388 A CN104198388 A CN 104198388A CN 201410468545 A CN201410468545 A CN 201410468545A CN 104198388 A CN104198388 A CN 104198388A
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Abstract
The invention discloses an online water quality monitoring device based on composite spectrum measurement. The online water quality monitoring device comprises an excitation unit, a spectrum acquisition unit and a control unit; the excitation unit comprises a composite light source and a transmission optical fiber; the spectrum acquisition unit comprises an optical flow cell, a detecting optical fiber and a spectrum acquisition module; the control unit comprises a computer; the composite light source is a wide wavelength continuous light source and an LED (Light Emitting Diode) discrete light source of six different wavelengths, and emits required light of the different wavelengths under the control of the upper computer; the composite light source is used, thereby being capable of detecting absorbance, fluorescence and scattering signals, furthermore, multiple water quality parameters are measured to realize a comprehensive, real-time, rapid and accurate understanding of changes of water quality parameters. Specific concentrations of the parameters in a sample to be tested are converted from obtained relationships between different signals and components in water quality to ensure further improvement of the measuring accuracy.
Description
Technical field
Patent of the present invention relates to checkout equipment, is a kind of water quality on-line measurement device specifically.
Technical background
Be accompanied by the high speed development of national economy, economic liftoff, yield-power increases, and the water quality environment of China has also been subjected to serious destruction.In commercial production, aquaculture, environmental monitoring, health care and field of scientific study, need to grasp in real time the parameters situation of change in water body, to detect and control.Traditional chemical method depends on chemical reaction, is difficult to thoroughly break away from labyrinth, consumes reagent, easily causes the intrinsic deficiencies such as secondary pollution, is more and more difficult to meet the needs of social development.Yet spectroscopic methodology, without any need for chemical reagent, on not impact of water quality itself, and does not need water sample to process, and directly measures, and detects data fast, has avoided loaded down with trivial details step.The instrument of spectroscopy measurements water quality adopts single light source or two light source more at present, and measurement parameter is more single.Compare with western developed country, the water quality environment detection of China, sensor technology are also totally backward, lack reasonable price, can analytical parameters comprehensively, in real time, the biosensor analysis instrument of independent intellectual property right fast, accurately, this situation has seriously restricted the monitoring of water quality environment and control.
Summary of the invention
For solving the problems of the technologies described above, the present invention adopts composite light source to carry out the shortcoming that water quality line Measurement Technique has been avoided above-mentioned aspect, can measure a plurality of water quality parameters simultaneously, realize and comprehensively, in real time, fast, accurately understand water quality parameters situation of change, improve the monitoring technology level of environment department to water quality parameters, for effective prevention of water body pollution provides strong technical support.
The object of the invention is in order to overcome the shortcoming of the above-mentioned aspect existing in prior art, realize comprehensive, real-time, quick, measure water matter parameters situation of change, provide a kind of based on absorbance technology, fluorescent technique and scattering technology, without depending on chemical reaction, hardly with safeguarding, and be not vulnerable to external interference, the water quality on-line monitoring device of use.Utilize pollutant in water body to the absorption characteristic of light, fluorescent characteristic and scattering properties, to derive the concentration of parameters in water body.Continuous light source is vertically injected in testing sample, obtains the absorbance of sample by spectra collection module; Discrete light sources is comprised of the LED light source of 6 different wave lengths, and discrete light sources transmitting incident light enters in testing sample, in the vertical 90 ° of directions of its light path, obtains fluorescence and scattered signal.By the relation between composition in the unlike signal that obtains and water quality, converse in testing sample the concrete concentration with parameter.
Concrete scheme is as follows:
An online water monitoring device of measuring based on complex spectrum, is characterized in that: comprise and excite unit, spectra collection unit and control module;
The described unit that excites comprises composite light source, conduction optical fiber;
Described spectra collection unit comprises optical flow cell, detection optical fiber, spectra collection module;
Described control module comprises computing machine;
Wherein:
Computing machine is host computer, for acquisition process demonstration storage and the control to whole system of spectroscopic data;
Composite light source is the LED discrete light sources of a wide wavelength continuous light source and 6 different wave lengths, under host computer computer control, send required different wavelengths of light, wide wavelength continuous light is transferred to optical flow cell by conduction optical fiber, and the discrete light of LED of 6 different wave lengths is without directly entering optical flow cell through conduction optical fiber;
The light of directly being launched by LED light source in optical flow cell and the wide wavelength continuous light being come by conduction fiber optic conduction are used for exciting material acquisition in water body to absorb light, fluorescence and scattered light, absorb light, fluorescence and scattered light and enter into detection optical fiber, complete absorbing the Quick Acquisition of light, fluorescence and scattered light signal, through detection optical fiber, transfer to spectra collection module;
Spectra collection module is used for absorption light, fluorescence and scattered light signal Quick Acquisition.
Described photoelectricity flow cell comprises matrix, water inlet, collimation lens, conduction fibre-optical splice, LED joint, condenser lens, detection optical fiber joint, water delivering orifice, quartzy optical window; Described conduction fibre-optical splice is arranged on matrix top, described detection optical fiber joint is arranged on matrix bottom, in matrix side the first half and the latter half, set into respectively the mouth of a river and water delivering orifice, it is inner that described collimation lens is arranged on conduction fibre-optical splice, on detection optical fiber joint top, condenser lens is set, in the matrix side the latter half of removing water inlet and water outlet actinal surface, LED joint is set, at conduction fibre-optical splice, detection optical fiber joint and LED joint, near the front end of matrix, quartzy optical window is set respectively.
The wavelength coverage of the wide wavelength light source of described composite light source 1 is 185～1100nm, and the centre wavelength of the LED light source of 6 different wave lengths is respectively 260nm, 285nm, 315nm, 375nm, 341nm and 405nm.
The wavelength coverage that described spectra collection module gathers meets 200～1100nm.
Advantage of the present invention is:
1, adopt spectroscopic methodology without any need for chemical reagent, on not impact of water quality itself, and do not need water sample to process, directly measure, detect data fast, avoided loaded down with trivial details step.
2, adopt composite light source, can detect absorbance, fluorescence and scattered signal, measure a plurality of water quality parameters simultaneously, realize and comprehensively, in real time, fast, accurately understand water quality parameters situation of change.By the relation between composition in the unlike signal that obtains and water quality, converse in testing sample the concrete concentration with parameter, thereby guaranteed the further raising of measuring accuracy.
3, can select separately according to actual needs required light source to carry out accurately detecting separately, meet the needs of multiple environmental monitoring.
The online water monitoring device of multiparameter of the present invention, adopts spectroscopy measurements, can realize to water quality directly measure, detection speed is fast, avoids loaded down with trivial details step, do not need chemical reagent simultaneously, avoids the secondary pollution to water quality.Adopt composite light source as light source, can obtain absorbance, fluorescence and scattered signal, measure a plurality of water quality parameters simultaneously, realize and comprehensively, in real time, fast, accurately understand water quality parameters situation of change.Improve the monitoring technology level of environment department to water quality parameters, for effective prevention of water body pollution provides strong technical support.
Accompanying drawing explanation:
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the cross-sectional view of optical flow cell;
Fig. 3 is the plan structure schematic diagram of optical flow cell.
Embodiment
As shown in Figure 1, comprise and excite unit, spectra collection unit and control module;
The described unit that excites comprises composite light source 1, conduction optical fiber 2;
Described spectra collection unit comprises optical flow cell 3, detection optical fiber 4, spectra collection module 5;
Described control module comprises computing machine 6;
Wherein:
Computing machine 6 is host computer, for acquisition process demonstration storage and the control to whole system of spectroscopic data;
Composite light source 1 is the LED discrete light sources of a wide wavelength continuous light source and 6 different wave lengths, under controlling, host computer computing machine 6 sends required different wavelengths of light, wide wavelength continuous light is transferred to the discrete light of LED of 3,6 different wave lengths of optical flow cell without directly entering optical flow cell 3 through conduction optical fiber 2 by conduction optical fiber 2;
The light of directly being launched by LED light source in optical flow cell 3 and the wide wavelength light of being come by 2 conduction of conduction optical fiber are used for exciting material in water body to obtain absorption light, fluorescence and scattered light, absorb light, fluorescence and scattered light and enter into detection optical fiber 4, complete absorbing the Quick Acquisition of light, fluorescence and scattered light signal, through detection optical fiber 4, transfer to spectra collection module 5;
Spectra collection module 5 is used for absorption light, fluorescence and scattered light signal Quick Acquisition, can adopt the Ocean Optics USB2000 of company model.
As shown in Figure 2,3, photoelectricity flow cell 3 comprises matrix 400, water inlet 401, collimation lens 402, conduction fibre-optical splice 403, LED joint 404, condenser lens 405, detection optical fiber joint 406, water delivering orifice 407, quartzy optical window 408; Described conduction fibre-optical splice 403 is arranged on matrix 400 tops, described detection optical fiber joint 406 is arranged on matrix 400 bottoms, in matrix 400 side the first half and the latter half, set into respectively the mouth of a river 401 and water delivering orifice 407, described collimation lens 402 is arranged on conduction fibre-optical splice 403 inside, on detection optical fiber joint 406 tops, condenser lens 405 is set, in matrix 400 side the latter halfs, LED joint 404 is set, at conduction fibre-optical splice 403, detection optical fiber joint 406 and LED joint 404, near the front end of matrix 400, quartzy optical window 408 is set respectively.
The wavelength coverage of the wide wavelength light source of described composite light source 1 is 185～1100nm, can adopt the 6/10S of Heraeus company model, and the centre wavelength of the LED light source of 6 different wave lengths is respectively 260nm, 285nm, 315nm, 375nm, 341nm and 405nm.
The wavelength coverage that described spectra collection module 5 gathers meets 200～1100nm.
The principle of the invention is: continuous light source is vertically injected in testing sample, and testing sample absorbs vertical incidence continuous light, and after incident light is by testing sample, light intensity decreasing becomes I.For sample arranges reference light I
0(same light source by same light path pure water after light intensity), according to langbobier law
try to achieve the concrete concentration of some parameter in testing sample; Discrete light sources is comprised of the LED light source of 6 different wave lengths, the incident light that discrete light sources can be launched different wave length enters in testing sample, incident light enter after testing sample with sample in matter interaction produce fluorescence and scattered signal, by spectra collection module, in its light path vertical direction, obtain fluorescence and scattered signal, according to different fluorescence and scattered signal, parameter is carried out to qualitative analysis, due to the parameter of variable concentrations corresponding different fluorescence and scattered signal, can to measurement parameter, carry out quantitative test according to different fluorescence and scattered signal intensity.By the particular kind of relationship between composition in the unlike signal that obtains and water quality, set algorithms of different, thereby converse the concrete concentration of each parameter in testing sample, thereby guaranteed the further raising of measuring accuracy.
Claims (5)
1. an online water monitoring device of measuring based on complex spectrum, is characterized in that: comprise and excite unit, spectra collection unit and control module;
The described unit that excites comprises composite light source (1), conduction optical fiber (2);
Described spectra collection unit comprises optical flow cell (3), detection optical fiber (4), spectra collection module (5);
Described control module comprises computing machine (6);
Wherein:
Computing machine (6) is host computer, for acquisition process demonstration storage and the control to whole system of spectroscopic data;
Composite light source (1) is the LED discrete light sources of a wide wavelength continuous light source and 6 different wave lengths, under controlling, host computer computing machine (6) sends required different wavelengths of light, wide wavelength continuous light is transferred to optical flow cell (3) by conduction optical fiber (2), and the discrete light of LED of 6 different wave lengths is without directly entering optical flow cell (3) through conduction optical fiber (2);
The light of directly being launched by LED light source in optical flow cell (3) and the wide wavelength continuous light being come by conduction optical fiber (2) conduction are used for exciting material in water body to obtain absorption light, fluorescence and scattered light, absorb light, fluorescence and scattered light and enter into detection optical fiber (4), complete absorbing the Quick Acquisition of light, fluorescence and scattered light signal, through detection optical fiber (4), transfer to spectra collection module (5);
Spectra collection module (5) is used for absorption light, fluorescence and scattered light signal Quick Acquisition.
2. measurement mechanism according to claim 1, is characterized in that: described photoelectricity flow cell (3) comprises matrix (400), water inlet (401), collimation lens (402), conduction fibre-optical splice (403), LED joint (404), condenser lens (405), detection optical fiber joint (406), water delivering orifice (407), quartzy optical window (408), described conduction fibre-optical splice (403) is arranged on matrix (400) top, described detection optical fiber joint (406) is arranged on matrix (400) bottom, in matrix (400) side the first half and the latter half, set into respectively the mouth of a river (401) and water delivering orifice (407), described collimation lens (402) is arranged on conduction fibre-optical splice (403) inside, on detection optical fiber joint (406) top, condenser lens (405) is set, in matrix (400) the side the latter half of removing water inlet (401) and water delivering orifice (407) face, LED joint (404) is set, respectively at conduction fibre-optical splice (403), detection optical fiber joint (406) and LED joint (404) arrange quartzy optical window (408) near the front end of matrix (400).
3. measurement mechanism according to claim 1, is characterized in that: the wavelength coverage of the wide wavelength continuous light source of composite light source (1) is 185～1100nm.
4. measurement mechanism according to claim 1, is characterized in that: the centre wavelength of the LED light source of 6 different wave lengths of composite light source (1) is respectively 260nm, 285nm, 315nm, 375nm, 341nm and 405nm.
5. measurement mechanism according to claim 1, is characterized in that: the wavelength coverage that spectra collection module (5) gathers meets 200～1100nm.
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Cited By (13)
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| CN106370613A (en) * | 2016-11-10 | 2017-02-01 | 广东电网有限责任公司电力科学研究院 | Spectrum system and method for directly measuring concentration of furfural in transformer oil |
| CN106885770A (en) * | 2016-03-04 | 2017-06-23 | 摩瑞尔电器（昆山）有限公司 | A kind of big data system and method based on laser detection solution |
| CN106932373A (en) * | 2017-04-01 | 2017-07-07 | 燕山大学 | Total organic carbon optics home position sensing |
| CN107064448A (en) * | 2017-06-30 | 2017-08-18 | 中国海洋大学 | A kind of seawater multi-parameter sensor based on full spectrum of wavelengths method |
| CN107643260A (en) * | 2017-11-06 | 2018-01-30 | 汉威科技集团股份有限公司 | A kind of wide spectrum Multiparameter water quality monitoring system |
| CN108318428A (en) * | 2018-05-16 | 2018-07-24 | 德州尧鼎光电科技有限公司 | A kind of photoelectric sensing measuring device |
| CN110018137A (en) * | 2017-12-15 | 2019-07-16 | 恩德莱斯和豪瑟尔分析仪表两合公司 | Optical sensor |
| CN110132922A (en) * | 2019-05-28 | 2019-08-16 | 哈尔滨工业大学（威海） | A kind of rapid on-line detecting method of chlorophyll concentration |
| 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 |
| CN111678869A (en) * | 2020-05-29 | 2020-09-18 | 山东省科学院海洋仪器仪表研究所 | Water quality ecological parameter detection device and detection method |
| CN112304875A (en) * | 2020-11-09 | 2021-02-02 | 中国科学院西安光学精密机械研究所 | Water quality monitoring system and method based on spectrum method |
| 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 |
| CN112304875B (en) * | 2020-11-09 | 2024-05-31 | 中国科学院西安光学精密机械研究所 | Water quality monitoring system and method based on spectrometry |
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| CN110132922A (en) * | 2019-05-28 | 2019-08-16 | 哈尔滨工业大学（威海） | A kind of rapid on-line detecting method of chlorophyll concentration |
| 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 |
| CN111678869A (en) * | 2020-05-29 | 2020-09-18 | 山东省科学院海洋仪器仪表研究所 | Water quality ecological parameter detection device and detection method |
| CN112304875A (en) * | 2020-11-09 | 2021-02-02 | 中国科学院西安光学精密机械研究所 | Water quality monitoring system and method based on spectrum method |
| CN112304875B (en) * | 2020-11-09 | 2024-05-31 | 中国科学院西安光学精密机械研究所 | Water quality monitoring system and method based on spectrometry |
| 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 |
| CN114166747B (en) * | 2021-11-29 | 2023-12-15 | 浙江大学 | Discrete three-dimensional fluorescence/visible light absorption spectrum detection device for distinguishing water pollution |
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