CN1677087A - Water quality monitoring device and method - Google Patents
Water quality monitoring device and method Download PDFInfo
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- CN1677087A CN1677087A CN 200410030755 CN200410030755A CN1677087A CN 1677087 A CN1677087 A CN 1677087A CN 200410030755 CN200410030755 CN 200410030755 CN 200410030755 A CN200410030755 A CN 200410030755A CN 1677087 A CN1677087 A CN 1677087A
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Abstract
The invention discloses a new water quality monitor device and its technique. It comprises a optic probe with two light source of two determined wave length and signal input output optic fiber, and a semiconductor light wave length probe. The optic probe is put in the water and or in the water tube. The two light rays of different wave length goes into the probe through light coupling device, passing through the monitoring water, then the penetrating light is lead out to the optic probe single output optic fiber and surveyed by the semiconductor light wave length probe. Above water quality survey device and the technique is adaptive to remote real-time auto water quality and chroma, turbidity survey. It has water flow, weather or other factor resistance, and low energy consuming, easy operation and handily amendment, simple structure and low cost.
Description
One, affiliated technical field
The present invention relates to a kind of device and method of water quality monitoring, especially be suitable for sensor technology and method that remote live is monitored sewage and natural water water quality colourity automatically, belong to the environmental monitoring technology field.
Two, background technology
The pressing problem that water prevention and cure of pollution face is a real-time automatic monitoring blowdown enterprise wastewater qualified discharge whether how, incident, the contaminated accident of burst water resource to the waste discharge that exceeds standard are carried out timely monitoring automatically and warning, so that the consequence that environmental protection supervisory department can harness the river, in time control and the elimination accident is brought in accordance with the law.Why think like this because some blowdown enterprise for the consideration of self economic interests, or lack a sense of responsibility, though the cost huge fund has been installed sewage treatment equipment, always to have a mind to or be not intended to not normal operation input, pollution treatment instrument has become the ornaments of deceiving and be perfunctory to environmental inspection department.In addition, the contaminated burst accident of water resource also happens occasionally.Environmental inspection department does not lack water quality detection equipment and means, and scarce is unattended duty, at the scene to water quality, especially the real-time automatic monitoring of flowing water water quality and alarm technique.The parameter of this technical requirement monitoring is not necessarily a lot, precision is not necessarily very high, but requirement can judge water quality (for example colourity of water, turbidity, pH value or chemical oxygen demand COD value) automatically whether ANOMALOUS VARIATIONS takes place, equipment operation and safeguard easily, anti-current water, weather or other on-the-spot factor interference performances be strong, cheap.In case it monitors water quality generation ANOMALOUS VARIATIONS and just can report to the police automatically, make things convenient for the environmental protection aufsichtsrat in time to arrive on-the-spot further evidence obtaining and detect, and prevent in accordance with the law and punish illegal discharging behavior, or control spreading of damage sequence.
It is water white cleaning pure natural water, and in other words, coloured or turbid water is contaminated or blowdown water not up to standard.Organic pollution accounts for significant proportion in all water pollute, and nearly all organism is with the absorption feature that all has separately at 215-316nm one, utilizes uv absorption photometer method, can the testing total organic content.Therefore colourity, turbidity and COD (chemical oxygen demand (COD)) value are the important indicators of water quality monitoring.The existing method that detects water quality colourity and turbidity mainly contains visual colorimetry and spectrophotometric method (comprising spectrometry and ultra-violet absorption spectrometry).The former simple, intuitive, but error is big, is not suitable for automatic measurement; The latter can do quantitatively and accurately to measure, and the parameter of measurement water quality is many, can detect pollutant composite target and special water quality index, stable performance, be widely used in the online detection of water quality (referring to Wang An, Xie Yu, beam column, " research of determination of colority in the water ", the Chinese environmental monitoring, the 16th volume, the 2nd phase, 2000, the 37th page).But existing spectrophotometric method is not suitable for the real-time automatic monitoring of long-range water quality, is not suitable for monitoring flowing water water quality, is subjected to the influence of weather and site environment easily, and equipment is expensive.In addition, once had a kind of liquid color sensitive sensor that combines based on coloured optical glass optical filter and silicon photocell report (referring to Chen Jiasheng, Ji Xinyuan, " adopting the liquid look Design of Sensor of fiber optic conduction ", sensor technology, 2002 the 21st the 9th phases of volume, the 21st page; Chen Jiasheng, " adopting the liquid look measurement mechanism of fiber optic conduction ", utility model patent, ZL 02220059.2).It adopts pulse xenon lamp illumination, fibre bundle to pass light and photoelectric integral method is measured.Because the luminous instability of pulse xenon lamp needs the luminous intensity of paired pulses xenon lamp to monitor.Therefore, this color sensitive sensor has adopted bifocal path structure.The one light path is for measuring light path, another light path for the monitoring light path (referring to Chen Jiasheng, Ji Xinyuan, " adopting the liquid look Design of Sensor of fiber optic conduction ", sensor technology, 2002 the 21st the 9th phases of volume, the 21st page; Chen Jiasheng, " adopting the liquid look measurement mechanism of fiber optic conduction " utility model patent, ZL 02220059.2).This sensor can be measured colourity more exactly, can carry out the scene measures automatically, but used color sensitive sensor needs three photoelectric cells that cover optical filter, the light path of measuring system is complicated, the light source power consumption is big, the interference capability of anti-liquid disturbance and other on-the-spot factors is poor, and real-time automatic monitoring and the warning of making sewage or natural water (especially flowing water) water quality as if the scene of using unattended duty have many difficulties.
Three, summary of the invention
(1) goal of the invention
A kind of device and method of monitoring water quality is provided.It can monitor the variation of water quality colourity (comprising ultraviolet absorptivity), turbidity, is suitable for remote live and monitors water quality ANOMALOUS VARIATIONS and the warning that causes because of pollutions such as heavy metal, dye well organism automatically.
(2) technical scheme
A kind of device of monitoring water quality is characterized in that: it comprises the optic probe of light source with two particular peak wavelength, band signal input-output optical fiber and can measure the optical semiconductor wavelength detector of quasi-monochromatic light centre wavelength.The light of two particular peak wavelength that light source sends enters optic probe via the signal input optical fibre, and through behind the water that will monitor, the output optical fibre of optical signals optic probe is drawn, and is detected by optical semiconductor wavelength detector.
Two have the light source of particular peak wavelength can be that two semiconductor light-emitting-diodes, two semiconductor laser diodes or a uviol lamp add two narrowband optical optical filters.If make light source, can between light emitting diode and optic probe, add or not add the narrowband optical optical filter with light emitting diode.
Described optic probe such as Fig. 1 or shown in Figure 2.It comprises cavity, light signal input, output optical fibre, and optical lens, the support of fixed fiber, lens, it can also comprise optical mirror, and water can enter in the described probe cavity, and described cavity can cover extraneous parasitic light.Described optic probe constitutes optical path.Be that incident light enters in the cavity of probe via input optical fibre, behind lens and monitored water, transmitted light (as shown in Figure 1) or reflected light (as shown in Figure 2) are coupled into the output optical fibre of optic probe, and output optical signals optical semiconductor wavelength detector detects.
Described optical semiconductor wavelength detector is made up of two back-to-back semiconductor p-n junction photodiodes, described two p-n junctions along be detected the light signal incident direction and aim at arrangement (referring to accompanying drawing 3).Described two p-n junction photodiodes are surveyed light signal simultaneously during work.Described optical semiconductor wavelength detector can have p-n-p structure (referring to accompanying drawing 3), also can have the n-p-n structure, or other mutation structure that is made of these two kinds of basic structures.The semiconductor material of making described optical wavelength detector can be semiconductor material or the heterojunction semiconductor materials relevant with them such as silicon, silit, gallium nitride, gallium arsenide, indium phosphide.
The method of monitoring water quality is: optic probe is placed in the monitored water or in the water pipe, water enters in the described probe cavity.Light with two particular peak wavelength is by photo-coupler (for example two-in-one fiber coupler) or a biography light beam, enter probe from the input optical fibre of optic probe, through behind the monitored water, transmitted light (as shown in Figure 1) or reflected light (as shown in Figure 2) are drawn by the signal output optical fibre of optic probe, are detected by described semiconductor wavelength detector again.During the work of optical semiconductor wavelength detector, described two p-n junction photodiodes are surveyed light signal simultaneously, the ratio of described two p-n junction photodiode photocurrents is used for monitoring the colourity (comprising ultraviolet absorptivity) of water quality, and the size of described two p-n junction photodiode photocurrents is used for monitoring the turbidity of water quality.
In case the colourity of water quality (comprising ultraviolet absorptivity) changes, the light of the monitored water of process can take place to select to absorb, and causes changing from the light signal center wavelength of optic probe output.Perhaps,, can change, cause changing from the intensity of the light signal of optic probe output through the optical transmission rate of monitored water in case the turbidity of water quality changes.After optical wavelength detector detects flashlight centre wavelength or intensity and changes, can send alerting signal by control circuit.
(3) beneficial effect
This water monitoring device and method are fit to be applied to remote live and monitor the colourity of sewage or natural water water quality, turbidity and COD value automatically, and anti-current water, weather or other on-the-spot factor interference capability be strong, low in energy consumption, it is easy, simple in structure, cheap to move and safeguard.
Four, description of drawings
Fig. 1 transmissive optical probe synoptic diagram.1-input, output optical fibre, 2-optical lens, 3-fixed support, 4-cavity.
Fig. 2 reflection-type optical probe synoptic diagram.1-input, output optical fibre, 2-optical lens, 3-fixed support, 4-cavity, 5-optical mirror.
Fig. 3 optical semiconductor wavelength panel detector structure synoptic diagram.
Five, embodiment
The present invention is when implementing, and optic probe is placed in the monitored water or in the water pipe, monitored water can enter in the interior optical path of optic probe.The light that two light sources that particular peak wavelength arranged send enters probe by the optic probe input optical fibre, and through behind the monitored water, flashlight is drawn by the output optical fibre of optic probe, is detected by optical semiconductor wavelength detector again.
Described two light sources that particular peak wavelength arranged can be that two semiconductor light-emitting-diodes or two semiconductor laser diodes or a uviol lamp add two narrowband optical optical filters.If make light source, between light emitting diode and optic probe, can add also and can not add the narrowband optical optical filter with light emitting diode;
The light of two-way particular peak wavelength is by two-in-one fiber coupler, enter probe from the signal input optical fibre of optic probe, behind lens and monitored water, transmitted light is collected and directly is coupled into the signal output optical fibre (as shown in Figure 1) of optic probe by lens;
Perhaps the light of two-way particular peak wavelength passes light beam by one, enter probe from the signal input optical fibre of optic probe, behind lens and monitored water, by a mirror reflects, reflected light is collected and is coupled into the signal output optical fibre (as shown in Figure 2) of optic probe by lens;
Described optical semiconductor wavelength detector is made up of two back-to-back semiconductor p-n junction photodiodes, described two p-n junctions along be detected the light signal incident direction and aim at arrangement (referring to accompanying drawing 3).Light signal is surveyed and read to two p-n junction photodiodes simultaneously during work.Described optical semiconductor wavelength detector can have p-n-p structure (referring to accompanying drawing 3), perhaps has the n-p-n structure, or other mutation structures that are made of these two kinds of basic structures.The semiconductor material of making described optical wavelength detector can be silicon, silit, gallium nitride, gallium arsenide, indium phosphide or associated heterojunction semiconductor material.The ratio of described two p-n junction photodiode photocurrents is used for monitoring the colourity (comprising ultraviolet absorptivity) of water quality, and the size of described two p-n junction photodiode photocurrents is used for monitoring the turbidity of water quality.
Need to prove that the foregoing description instrument is for the unrestricted claim of the present invention of explanation the present invention, and is any based on equivalents technology of the present invention, all should be in scope of patent protection of the present invention.
Claims (9)
1, a kind of novel water monitoring device is characterized in that: it comprises the optic probe of light source with two particular peak wavelength, band signal input-output optical fiber and can measure the optical semiconductor wavelength detector of quasi-monochromatic light centre wavelength.The light that the light source of two particular peak wavelength sends enters optic probe via the input optical fibre of optic probe, and through behind the water that will monitor, optical signal transmissive is drawn by the output optical fibre of optic probe, is detected by optical semiconductor wavelength detector.
2, according to the light source of claim 1 described two particular peak wavelength, it is characterized in that: two have the semiconductor light-emitting-diode of particular peak wavelength, two semiconductor laser diodes that particular peak wavelength is arranged or a uviol lamp to add two narrowband optical optical filters.
3, according to the optic probe of claim 1 described band signal input-output optical fiber, it is characterized in that: it comprises cavity, light signal input optical fibre, light signal output optical fibre, optical lens.It can also comprise optical mirror.Water can enter in the described probe cavity, and described cavity can cover extraneous parasitic light.
4, according to the optic probe of claim 1 and 3 described band signal input-output optical fibers, it is characterized in that: it constitutes an optical path, flashlight enters in the cavity of probe via input optical fibre, behind lens and monitored water, transmitted light is collected and directly is coupled into respectively the output optical fibre of optic probe by other lens; The signal output optical fibre of optic probe is collected and is coupled in the perhaps transmitted light mirror reflection that is reflected again by lens.
5, according to claim 1 described optical semiconductor wavelength detector, it is characterized in that: it is made up of two back-to-back semiconductor p-n junction photodiodes, described two p-n junctions along be detected the light signal incident direction and aim at arrangement, folder one conductive layer (being called the middle layer) between described two p-n junctions, the outer conducting layer of described two p-n junctions is shaped on electrode, described conductive intermediate layer also is shaped on electrode.
6, according to claim 1 and 5 described optical semiconductor wavelength detectors, it is characterized in that: have the p-n-p structure, perhaps n-p-n structure, or, comprise the integrated opto-electronic circuit that contains described basic structure or mutation structure by other mutation structure that described p-n-p or n-p-n basic structure are formed.
7, according to claim 1,5 and 6 described optical semiconductor wavelength detectors, it is characterized in that: the semiconductor material of making described detector is silicon, silit, gallium nitride, gallium arsenide, phosphatization steel or the heterojunction semiconductor material relevant with them.
8, a kind of method of using the described water monitoring device monitoring of claim 1 water quality, it is characterized in that: as claim 1,3 and 4 described optic probes are placed in the monitored water or in the water pipe, water enters in the interior optical path of described probe cavity, enter probe by photo-coupler from the signal input optical fibre of described optic probe by claim 1 and 2 described light with two particular peak wavelength, through behind the monitored water, flashlight is drawn by the signal output optical fibre of described optic probe, again by as claim 1,5,6 and 7 described optical semiconductor wavelength detectors detect.
9, water quality monitoring method according to claim 8, it is characterized in that: during as claim 1 and the work of 8 described semiconductor wavelength detectors, survey light signal simultaneously as claim 5 described two p-n junction photodiodes, the ratio of described two p-n junction photodiode photocurrents is used for monitoring the colourity (comprising ultraviolet absorptivity) of water quality, and the size of described two p-n junction photodiode photocurrents is used for monitoring the turbidity of water quality.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101611306B (en) * | 2007-01-11 | 2011-04-13 | 英特利泰克水有限公司 | Apparatus for measuring the turbidity of water |
| CN102235975A (en) * | 2010-05-06 | 2011-11-09 | 中天建设集团有限公司 | Liquid turbidity detection device |
| CN102253175A (en) * | 2011-04-06 | 2011-11-23 | 上海市城市排水有限公司排水设计研究分公司 | Method for detecting initial rain water quality of drainage system through inversion of turbidity |
| CN102798602A (en) * | 2012-08-13 | 2012-11-28 | 重庆大学 | Integrated dual-beam water quality COD on-line detection sensor |
| CN103185700A (en) * | 2011-12-29 | 2013-07-03 | 中央大学 | Variable optical path measuring device and method for measuring components and concentration thereof in water |
| CN103278482A (en) * | 2013-04-28 | 2013-09-04 | 燕山大学 | Dual-probe type optical detection device for detecting chlorophyll-a in water |
| CN103439971A (en) * | 2013-08-13 | 2013-12-11 | 北京师范大学 | Robot for detecting underwater topography and water quality index in reservoir area |
| CN103487376A (en) * | 2013-09-29 | 2014-01-01 | 云南师范大学 | Optical fiber sampler |
| CN103512846A (en) * | 2013-09-29 | 2014-01-15 | 云南师范大学 | Optical fiber sampler |
| CN104568797A (en) * | 2015-01-16 | 2015-04-29 | 上海交通大学 | On-line sewage chroma monitoring system |
| CN105727326A (en) * | 2014-12-24 | 2016-07-06 | 马克西姆综合产品公司 | Mobile Uv Sterilization Device And Method |
| CN105806768A (en) * | 2016-04-28 | 2016-07-27 | 绍兴文理学院 | Sewage laser test table |
| CN106153563A (en) * | 2015-03-16 | 2016-11-23 | 北京中清国研环境技术研究院 | A kind of miniature COD on-line detecting system |
| CN107548454A (en) * | 2015-06-29 | 2018-01-05 | 惠普发展公司，有限责任合伙企业 | Detected and encapsulated using integrated lens analysis |
| CN108827926A (en) * | 2018-08-02 | 2018-11-16 | 深圳市水务科技有限公司 | A kind of water quality sensing probe and its water quality detection system |
| CN109406406A (en) * | 2018-10-21 | 2019-03-01 | 苏州高新区建金建智能科技有限公司 | A kind of device using optical-fiber laser monitoring trade effluent turbidity |
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2004
- 2004-04-02 CN CN 200410030755 patent/CN1677087A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101611306B (en) * | 2007-01-11 | 2011-04-13 | 英特利泰克水有限公司 | Apparatus for measuring the turbidity of water |
| CN102235975A (en) * | 2010-05-06 | 2011-11-09 | 中天建设集团有限公司 | Liquid turbidity detection device |
| CN102235975B (en) * | 2010-05-06 | 2013-02-27 | 中天建设集团有限公司 | Liquid turbidity detection device |
| CN102253175B (en) * | 2011-04-06 | 2013-12-18 | 上海市城市排水有限公司排水设计研究分公司 | Method for detecting initial rain water quality of drainage system through inversion of turbidity |
| CN102253175A (en) * | 2011-04-06 | 2011-11-23 | 上海市城市排水有限公司排水设计研究分公司 | Method for detecting initial rain water quality of drainage system through inversion of turbidity |
| CN103185700B (en) * | 2011-12-29 | 2016-08-31 | 中央大学 | Variable optical path measuring device and method for measuring components and concentration thereof in water |
| CN103185700A (en) * | 2011-12-29 | 2013-07-03 | 中央大学 | Variable optical path measuring device and method for measuring components and concentration thereof in water |
| CN102798602A (en) * | 2012-08-13 | 2012-11-28 | 重庆大学 | Integrated dual-beam water quality COD on-line detection sensor |
| CN103278482A (en) * | 2013-04-28 | 2013-09-04 | 燕山大学 | Dual-probe type optical detection device for detecting chlorophyll-a in water |
| CN103439971B (en) * | 2013-08-13 | 2016-01-27 | 北京师范大学 | A kind of reservoir area underwater topography and water-quality guideline sniffing robot |
| CN103439971A (en) * | 2013-08-13 | 2013-12-11 | 北京师范大学 | Robot for detecting underwater topography and water quality index in reservoir area |
| CN103512846A (en) * | 2013-09-29 | 2014-01-15 | 云南师范大学 | Optical fiber sampler |
| CN103487376A (en) * | 2013-09-29 | 2014-01-01 | 云南师范大学 | Optical fiber sampler |
| CN105727326A (en) * | 2014-12-24 | 2016-07-06 | 马克西姆综合产品公司 | Mobile Uv Sterilization Device And Method |
| CN105727326B (en) * | 2014-12-24 | 2021-03-02 | 马克西姆综合产品公司 | Mobile UV disinfection apparatus and method |
| CN104568797A (en) * | 2015-01-16 | 2015-04-29 | 上海交通大学 | On-line sewage chroma monitoring system |
| CN106153563A (en) * | 2015-03-16 | 2016-11-23 | 北京中清国研环境技术研究院 | A kind of miniature COD on-line detecting system |
| US10712278B2 (en) | 2015-06-29 | 2020-07-14 | Hewlett-Packard Development Company, L.P. | Analyte detection package with integrated lens |
| CN107548454A (en) * | 2015-06-29 | 2018-01-05 | 惠普发展公司，有限责任合伙企业 | Detected and encapsulated using integrated lens analysis |
| CN107548454B (en) * | 2015-06-29 | 2020-10-09 | 惠普发展公司，有限责任合伙企业 | Analyzing and detecting packages using integrated lenses |
| CN105806768A (en) * | 2016-04-28 | 2016-07-27 | 绍兴文理学院 | Sewage laser test table |
| CN108827926A (en) * | 2018-08-02 | 2018-11-16 | 深圳市水务科技有限公司 | A kind of water quality sensing probe and its water quality detection system |
| CN109406406A (en) * | 2018-10-21 | 2019-03-01 | 苏州高新区建金建智能科技有限公司 | A kind of device using optical-fiber laser monitoring trade effluent turbidity |
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