CN105954192B - A kind of double light path water body environment on-line measurement device based on spectral measurement methods - Google Patents
A kind of double light path water body environment on-line measurement device based on spectral measurement methods Download PDFInfo
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- CN105954192B CN105954192B CN201610570775.1A CN201610570775A CN105954192B CN 105954192 B CN105954192 B CN 105954192B CN 201610570775 A CN201610570775 A CN 201610570775A CN 105954192 B CN105954192 B CN 105954192B
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
Abstract
The present invention discloses a kind of double light path water body environment on-line measurement device based on spectral measurement methods, including a sealing shell, setting detection optical unit, signal processing unit in the shell, the intermediate position setting detection pond of shell；Light source control plate controls light source working, and light source issues ultraviolet-visible light；Ultraviolet-visible light becomes directional light after lens one；Directional light is divided into two-way after semi-transparent semi-reflecting lens, it is focused after passing through the optical window in detection pond all the way through lens two, acquisition module is transmitted to through optical fiber again, for testing water sample to be measured, another way is transmitted to control and signal processing module after being received as the reference signal that energy of light source changes by photodetector；The invention has the advantages that use it is solar powered, can longtime running, use the peace and quiet system of optical window, it is ensured that measurement data it is accurate.
Description
Technical field
The invention patent relates to water body environment pollutions to monitor field more particularly to environmental optics monitoring technical field on-line,
Specially a kind of double light path water body environment on-line measurement device based on spectral measurement methods.
Background technique
In recent years, with the rapid development of Chinese national economy, Domestic Environment pollution is got worse.Wherein, water body environment
It pollutes very prominent.Pollutant enters after water body to water body environment, aquatic animals and plants with seriously endangering, in drinking water greatly
There are this pollutants to cause damages to human health for amount.At present for the traditional detection method master of pollutant each in water body
To rely on chemical-agent technique.Conventional method needs to carry out water sample pretreatment, step mostly based on spot sampling, lab analysis
It is cumbersome, it is at high cost, it is difficult to meet the requirement of modern environment monitoring；Such analysis method constitutes a threat to the health of operator,
If waste liquid is directly discharged in environment, secondary pollution very serious also will cause.However spectroscopic methodology does not need anyization
Reagent to be learned, water quality itself is not influenced, and scene directly measures, and does not need to pre-process water sample, detection speed is fast,
Avoid cumbersome step.The domestic instrument using some of the contaminants in spectroscopic methodology detection water body mostly uses single light source at present, surveys
It is single to measure parameter.Compared with western developed country, water quality environment detection, the sensor technology in China are generally backwardness,
Lack reasonable price, comprehensive, real-time, quick, accurate multi-parameter can be achieved while the sensor of the independent intellectual property right of detection divides
Analyzer device, this situation seriously constrain the monitoring and control to water quality environment.
In addition, the instrument of some of the contaminants is generally used manually-operated method in existing spectroscopic methodology detection water body,
The pollutant for such as wanting to measure a certain place, a certain depth requires manually to arrive measurement point and implements measurement, this is not only time-consuming and laborious,
And it is sometimes also abnormally dangerous, the ocean somewhere of bad environments is such as arrived, is usually threatened to personal safety；And it cannot protect
The long-term real-time measurement of card.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of without artificial on duty, can be automatic for a long time
The on-line measurement device of real-time detection, specific technical solution are as follows:
A kind of double light path water body environment on-line measurement device based on spectral measurement methods, including a sealing shell, it is described
Setting detection optical unit, signal processing unit in shell, the intermediate position setting detection pond of shell；
The detection optical unit includes light source control plate, light source, lens one, semi-transparent semi-reflecting lens, lens two；
Signal processing unit includes acquisition module, control and signal processing module, photodetector and interface；
The light source control plate controls light source working, and light source issues ultraviolet-visible light；Ultraviolet-visible light is after lens one
Become directional light；Directional light is divided into two-way after semi-transparent semi-reflecting lens, focuses after passing through the optical window in detection pond all the way through lens two,
It is transmitted to acquisition module through optical fiber again, for testing water sample to be measured, the reference signal that another way changes as energy of light source is by light
Electric explorer is transmitted to control and signal processing module after receiving；
Control with signal processing module respectively with light source control plate, acquisition module, photodetector and temperature-measuring module
Connection, control also pass through interface with signal processing module and connect with host computer；
The detection pond includes a pair of optical window being symmetrical set, in the inside of optical window, setting cleaning brush, and the cleaning
Brush is driven by motor；Gas spout is set in the bottom in detection pond, the gas spout is towards optical window.
The interface connecting communication module, the communication module are connect by internet with host computer.
It further include battery, the battery is to detection optical unit, signal processing unit and motor power supply.
It further include solar battery group, the solar battery group is connect with battery；The solar battery group setting
On buoy；Gas spout is connect by tracheae with the tracheal entrance being arranged on buoy.
Check valve is arranged in the tracheae, and the check valve is in measurement for preventing endotracheal water from flowing into detection pond
The invention has the advantages that due to use it is solar powered, can longtime running, use the peace and quiet system of optical window, can
Guarantee the accurate of measurement data；It is arranged on marker post using tracheal entrance, and downward opening technical solution, can avoid sea
Wave enters tracheae, and then enters influence of the measuring cell to measurement data.
Detailed description of the invention
Fig. 1 is measurement partial structure diagram of the invention；
Fig. 2 is device gas circuit cleaning structure schematic diagram；
Fig. 3 is apparatus of the present invention measurement optical window position view；
Fig. 4 is overall structure diagram of the invention；
In Fig. 1: 1, light source control plate；2, light source；3, shell；4, lens one；5, semi-transparent semi-reflecting lens；6, photodetector；
7, optical window；8, lens two；9, temperature-measuring module；10, optical fiber；11, acquisition module；12, control and signal processing module；13,
Interface；14, motor；15, cleaning brush.
In Fig. 2: 7, optical window；16, gas circuit；17, air pipe interface.
In Fig. 3: 7, optical window；1401, motor shaft；15, cleaning brush；Cleaning brush location A；Cleaning brush B location.
In Fig. 4,18 be solar battery group, and 19 be buoy, and 20 be hawser, and 21 be marker post, and 22 be tracheal entrance.
Specific embodiment
Illustrate the present invention with reference to the accompanying drawing, as shown in Figure 1, the present invention includes a sealing shell 3,
Setting detection optical unit, signal processing unit in the shell 3, the intermediate position setting detection pond of shell；
The detection optical unit includes light source control plate 1, light source 2, lens 1, semi-transparent semi-reflecting lens 5, lens 28；
Signal processing unit includes acquisition module 11, control and signal processing module 12, photodetector 6 and interface 13；
The light source control plate 1 controls light source 2 and works, and light source 2 issues ultraviolet-visible light；Ultraviolet-visible light is through lens one
Become directional light after 4；Directional light is divided into two-way after semi-transparent semi-reflecting lens 5, all the way through lens two after the optical window 7 in detection pond
8 focus, then are transmitted to acquisition module 11 through optical fiber 10, for testing water sample to be measured, the ginseng that another way changes as energy of light source
It examines after signal is received by photodetector 6 and is transmitted to control and signal processing module 12；
Control is surveyed with light source control plate 1,11 pieces of mould of acquisition, photodetector 6 and temperature respectively with signal processing module 12
It measures module 9 to connect, control is also connect by interface 13 with host computer with signal processing module 12；
The detection pond includes a pair of optical window 7 being symmetrical set, and in the inside of optical window 7, cleaning brush 15 is arranged, described
Cleaning brush 15 is driven by motor 14；Gas spout 71 is set in the bottom in detection pond, the gas spout 71 is towards optical window 7；
To guarantee that remote real_time control and detection, the 13 connecting communication module of interface, the communication module pass through interconnection
Net is connect with host computer；Commercial products can be used in the communication module, such as use the communication module based on GSM or CDMA.
Further include battery as shown in figure 4, long-term unattended to guarantee, the battery to detection optical unit,
Signal processing unit and motor power supply；It further include solar battery group 18, the solar battery group 18 is connect with battery；Institute
Solar battery group is stated to be arranged on buoy 19；The gas circuit 16 of gas spout 7 is by air pipe interface 17 and is arranged on buoy
Tracheal entrance 22 connects.20 length of hawser between buoy and measuring device is adjustable, to adapt to the measurement of different depth.
Check valve is arranged in the tracheae, and the check valve is when measuring work for preventing endotracheal water from spraying by tracheae
Mouth 71 flows into detection ponds, influences measurement accuracy；The tracheal entrance is arranged on the marker post on buoy, and it is opening down to prevent
Only wave pours in measuring cell from tracheal entrance 22.
Commercially available production can be used in measurement module used in the present invention and control and signal processing module, photodetector
STM32 series monolithic can be used with signal processing module in product, such as control；Photodetector uses the line array CCD of Japanese shore pine.
Using xenon flash lamp as light source 2, and in light source 2 Front-end Design, one light source control plate 1, provided surely for light source 2
Fixed voltage guarantees that stablizing for light source 2 works normally.
The light source 2 uses xenon flash lamp, wave-length coverage 185nm-2000nm.
The light source control plate 1 is converted using secondary voltage, boosts to xenon flash lamp operating voltage by 12V.
It include quartzy optical window 7, gas circuit 16 and gas-tpe fitting 17 shown in Fig. 2.Gas circuit 16 is connected to by the gas-tpe fitting 17, outside
It connects air pump and cleans extraneous gas input pickup measurement position to quartzy 7 timing of optical window.
It include quartzy optical window 7, motor shaft 1401, cleaning brush 15, cleaning brush location A and cleaning brush B location shown in Fig. 3.Institute
Stating control and signal processing module 12, periodically control motor 14 rotates, and motor 14 drives cleaning brush 15 clear by motor shaft 1401
It swings back and forth between clean brush location A and cleaning brush B location, removes the spot on quartzy optical window 7.
The principle that the present invention cleans optical window in such a way that gas spout is combined with cleaning brush is: due under water, especially
Be it is deeper underwater, it is larger that motor-driven cleaning brush swings resistance, and the pressure between optical window is smaller, can not fully erased one
A little attachments, and the benefit of gas spout is used, on the one hand it is that can be sprayed by gas to optical window, forms the gas-liquid of a part
Blending space, in this way, the swing resistance of cleaning brush greatly reduces；Further, since gas is to spray to optical window direction, cleaning brush hangs down
Be directly a sheet in the surface in spout direction, therefore, show to apply certain pressure to cleaning brush, it is ensured that cleaning brush with
Fitting closely for optical window, improves cleaning efficiency；Again, the method removal attachment for applying drug by gas spout can be used
Object, to achieve the purpose that thoroughly to clean optical window.
The principle of the invention is: different molecular structures cause different material to have selection absorbability to light, to generate different
Absorption spectrum can analyze substance by research absorption Spectrum characteristic.According to the shape of the absorption spectrum curve of substance,
Number, height and the corresponding wavelength of absorption peak can carry out qualitative analysis to substance.The various concentration in certain concentration range
Pollutant and its characteristic peak height (absorbance value) it is in a linear relationship, by the height (absorbance value) for measuring its characteristic peak
Pollutant concentration can be finally inversed by.
The invention has the characteristics that
1, using xenon flash lamp as light source, and in one light source control plate of light source Front-end Design, light source control plate passes through
Secondary voltage variation provides stable voltage input for light source, ensure that the accuracy of measurement；
2, detection mechanism is detected using optical means, is not needed chemical reagent, is not influenced on water quality itself, and
Scene directly measures, and does not need to pre-process water sample, and detection speed is fast, avoids cumbersome step, instrument does not almost have to
Maintenance, it is simple and practical, automatic data collection and transmission can be carried out by remote communication interface, are suitable for long-term unattended
Monitoring；
3, light channel structure uses bifocal path structure, is one reference path of measure setup, can effectively avoid light source fluctuation
And light source decaying bring influences, and improves the measurement stability and accuracy of device；
4, calculation method of the invention is that spectrum considers as a whole by the light of ultraviolet-visible wave band, is based on artificial intelligence
Algorithm carries out concentration calculation, can effectively eliminate heterogeneity bring cross jamming, has higher sensitivity and accuracy；
5, device designs an automatic flushing device, and external air pump cleans quartzy optical window timing by tracheae, gas
Pump work cleaning brush work simultaneously, the two, which works at the same time, can effectively reduce optical window pollution, reduce measurement error；
6, multiple-quality water parameter, including COD, BOD, TOC, UV254, nitrate, nitrite and turbidity can be measured simultaneously
Deng, and design a temperature-measuring module, real-time detection water body environment temperature.
Effect of the invention:
A kind of double light path water body environment on-line measurement device based on spectral measurement methods of the invention is using measurement transmission
The pollutant concentrations such as light signal strength inverting COD, BOD, TOC, UV254, nitrate, nitrite and turbidity are, it can be achieved that water
The direct measurement of body environment, detection speed are fast, avoid cumbersome step, while not needing chemical reagent, avoid two to water quality
Secondary pollution.Using bifocal path structure, it can effectively avoid light source fluctuation and light source decaying bring from influencing, improve the survey of device
Measure stability and accuracy.To realize quick, real-time, accurate perception water body COD, BOD, TOC, UV254, nitrate, nitrous
The pollutants situation of change such as hydrochlorate and turbidity improves environmental protection department to the level monitoring of water body environment, to effectively prevent water
The contaminants such as body COD, BOD, TOC, UV254, nitrate, nitrite and turbidity provide strong technical support.
Connected due to using solar powered and wireless telecommunications, can long-term unattended operation, it is peace and quiet to use optical window
System, it is ensured that measurement data it is accurate；It is arranged on marker post using tracheal entrance, and downward opening technical solution,
Avoidable wave enters tracheae, and then enters influence of the measuring cell to measurement data.
Claims (3)
1. a kind of double light path water body environment on-line measurement device based on spectral measurement methods, including a sealing shell, feature
It is:
Setting detection optical unit, signal processing unit in the shell, the intermediate position setting detection pond of shell；
The detection optical unit includes light source control plate, light source, lens one, semi-transparent semi-reflecting lens, lens two；
Signal processing unit includes acquisition module, control and signal processing module, photodetector and interface；
The light source control plate controls light source working, and light source issues ultraviolet-visible light；Ultraviolet-visible light becomes after lens one
Directional light；Directional light is divided into two-way after semi-transparent semi-reflecting lens, focuses after passing through the optical window in detection pond all the way through lens two, then pass through
Optical fiber is transmitted to acquisition module, and for testing water sample to be measured, another way is visited as the reference signal that energy of light source changes by photoelectricity
It surveys after device receives and is transmitted to control and signal processing module；
Control is connect with light source control plate, acquisition module, photodetector and temperature-measuring module respectively with signal processing module,
Control also passes through interface with signal processing module and connect with host computer；
The detection pond includes a pair of optical window being symmetrical set, and in the inside of optical window, is arranged cleaning brush, the cleaning brush by
Motor driven；Gas spout is set in the bottom in detection pond, for the gas spout towards optical window, the gas-liquid for forming a part is mixed
Space is closed, to reduce the swing resistance of cleaning brush；The surface perpendicular to spout direction of cleaning brush is a sheet, and gas is to clear
The surface of clean brush applies certain pressure, guarantees fitting closely for cleaning brush and optical window, improves cleaning efficiency；Using passing through gas
The method that body spout applies drug removes attachment, to achieve the purpose that thoroughly to clean optical window；
Gas spout is connect by tracheae with the tracheal entrance being arranged on buoy, and tracheal entrance is opening down to prevent wave certainly
Tracheal entrance pours in measuring cell；
It further include solar battery group, the solar battery group is connect with battery；The solar battery group setting is floating
In drift；Check valve is arranged in the tracheae, and the check valve is in measurement for preventing endotracheal water from flowing into detection pond.
2. double light path water body environment on-line measurement device according to claim 1, it is characterised in that: the interface connection is logical
Module is interrogated, the communication module is connect by internet with host computer.
3. double light path water body environment on-line measurement device according to claim 1, it is characterised in that: it further include battery,
The battery is to detection optical unit, signal processing unit and motor power supply.
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