CN107643260A - A kind of wide spectrum Multiparameter water quality monitoring system - Google Patents
A kind of wide spectrum Multiparameter water quality monitoring system Download PDFInfo
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- CN107643260A CN107643260A CN201711080675.1A CN201711080675A CN107643260A CN 107643260 A CN107643260 A CN 107643260A CN 201711080675 A CN201711080675 A CN 201711080675A CN 107643260 A CN107643260 A CN 107643260A
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Abstract
The present invention provides a kind of wide spectrum Multiparameter water quality monitoring system, including system control device, broad spectrum light source, light path detection device, electrical measurement device, data processing and display device；The emergent light of the broad spectrum light source is incident to the electrical measurement device via the water body to be measured in the light path detection device, forms optical system for testing；The emergent light of the broad spectrum light source is incident to the electrical measurement device via the standard water body in the light path detection device, forms reference path；The electrical measurement device, the optical system for testing and the reference path are converted into test electric signal and reference electrical signal；The data processing and display device, the concentration of the parameter to be measured and parameter to be measured in water body to be measured is obtained according to the test electric signal and the reference electrical signal, and is shown；The system control device controls the connection broad spectrum light source, the electrical measurement device and the data processing and display device respectively.
Description
Technical field
The present invention relates to a kind of water quality monitoring system, specifically, relate to a kind of wide spectrum multi-parameter water quality monitoring system
System.
Background technology
Water is Source of life, not only closely related with industrial and agricultural production safety and human health, the Er Qieshui of quality of water quality
Bad judge, prediction and detection of fine quality depend on water quality inspection technique.Traditional water quality detection equipment can be entered to water quality parameter
Row detection, but general measures to single parameter, poor in timeliness, not only bad for the integration of data, also add detection
Cost.
In recent years, the uv-visible absorption spectroscopy method of one of water quality inspection technique as spectrum analysis, it not only gets rid of
Abandoned the water quality inspection technique such as chemical analysis and electrochemical analysis and chromatography water sample pretreatment it is numerous and diverse, measurement period is long, need
The shortcomings that wanting chemical reagent more, also have the advantages that detection speed is fast, cost is low and online, in site measurement can be realized.However,
This e measurement technology is monopolized by foreign countries, valuable product.The water analysis model machine of country's research and development, then there is detection water quality ginseng
The problem of single, light source of number and light path and photoelectric conversion section stability, poor repeatability.
In order to solve the problem present on, people are seeking a kind of preferable technical solution always.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, so as to provide a kind of design science, practical, detection matter
Measure reliable wide spectrum Multiparameter water quality monitoring system.
To achieve these goals, the technical solution adopted in the present invention is：A kind of wide spectrum multi-parameter water quality monitoring system
System, including system control device, broad spectrum light source, light path detection device, electrical measurement device, data processing and display device；
The emergent light of the broad spectrum light source is incident to the electricity via the water body to be measured in the light path detection device
Measurement apparatus, form optical system for testing；
The emergent light of the broad spectrum light source is incident to the electricity via the standard water body in the light path detection device
Measurement apparatus, form reference path；
The electrical measurement device, for the optical system for testing and the reference path to be converted into test electric signal and ginseng
Examine electric signal；
The data processing and display device, water body to be measured is obtained according to the test electric signal and the reference electrical signal
In parameter to be measured and parameter to be measured concentration, and show；
The system control device controls connection broad spectrum light source, the electrical measurement device and the number respectively
According to processing and display device.
Based on above-mentioned, the light path detection device includes transmitting receiving unit, reaction member and reflector element；
The transmitting receiving unit includes optical splitter and optical receiver；
The reaction member includes the sample pool built with water body to be measured and the reference cell built with standard water body, the sample
This pond and the both ends of the reference cell are respectively provided with optical transmission window；
The reflector element includes corresponding to described sample pool one end optical transmission window and described reference cell one end light inlet window respectively
The reflection unit that mouth is set；
The emergent light of the broad spectrum light source after the optical splitter via being divided into two-way emergent light；
After emergent light enters sample pool reaction all the way, the sample pool is reflected back by the reflection unit and reacted, then
Received by an incidence end of the optical receiver and form optical path；
After another way emergent light enters reference cell reaction, the reference cell is reflected back by the reflection unit and reacted,
Received again by another incidence end of the optical receiver and form reference path.
Based on above-mentioned, it is saturating that the transmitting receiving unit also includes the first collimation that the corresponding exit end of optical splitter two is set
Mirror and the 3rd collimation lens, and the 3rd collimation lens and the 4th that the corresponding incidence end of optical receiver two is set collimate thoroughly
Mirror.
Based on above-mentioned, the optical splitter is y-type optical fiber；
The optical receiver includes the first incident optical and the second incident optical, light path switching switch and the output optical fiber, institute
Stating light path switching switch controls first incident optical and second incident optical to be alternately connected with the output optical fiber, will
The optical system for testing or the reference path are alternately connected with the electrical measurement device.
Based on above-mentioned, the reflection unit includes optical system for testing reflection unit and reference path reflection unit, the test
Light path reflection unit includes the first completely reflecting mirror and the second completely reflecting mirror being correspondingly arranged, and the reference path reflection unit includes
The 3rd completely reflecting mirror being correspondingly arranged and the 4th completely reflecting mirror.
Based on above-mentioned, photodiode detector is provided with the sample pool and the reference cell.
Based on above-mentioned, the electrical measurement device includes on-site programmable gate array FPGA, photodetector, driving electricity
Road, buffer, A/D change-over circuits and RAM storage chips,
The on-site programmable gate array FPGA is used for the clock signal for generating drive circuit and generation RAM storage chips
Read-write control signal；
The drive circuit drive the photodetector by the optical system for testing in the presence of the clock signal and
The reference path is converted to test electric signal and reference electrical signal；
The buffer is used to the test electric signal, the reference electrical signal carrying out impedance matching and signal condition,
To be converted into the application signal of the A/D change-over circuits；
The test electric signal and the reference electrical signal are converted to data signal and are stored in institute by the A/D change-over circuits
State in RAM storage chips.
Based on above-mentioned, the broad spectrum light source includes the xenon flash lamp being connected with the system control device.
Based on above-mentioned, include being used to position the positioning mould in the geographical position of the wide spectrum Multiparameter water quality monitoring system
Block.
Based on above-mentioned, in addition to data transmission module, the data transmission module are used for the wide spectrum multi-parameter water
The concentration of parameter to be measured and parameter to be measured in the geographical position of quality supervision examining system, water body to be measured is sent to Cloud Server.
The present invention has prominent substantive distinguishing features and significantly improved compared with the prior art, and specifically, the present invention adopts
It is fast with Lambert-Beer's law direct measurement water quality parameter, detection speed, it is not necessary to chemical reagent, two to water quality can be avoided
Secondary pollution, while wide spectrum composite light source is used as incident light, by detecting what is interacted with material in water body to be measured
Scattered signal and transmission signal can be realized while measure multiple water quality parameters, realize comprehensive, real-time, quick and measure water matter
Oeverall quality situation and parameters situation of change.
Brief description of the drawings
Fig. 1 is the theory diagram of the present invention.
Fig. 2 is the structural representation of the light path detection device of the present invention.
Fig. 3 is the theory diagram of the electrical measurement device of the present invention.
Wherein, 1. broad spectrum light source；2.Y type optical fiber；3. the first incident optical；4. the second incident optical；5. the first collimation
Lens；6. the second collimation lens；7. the 3rd collimation lens；8. the 4th collimation lens；9. optical transmission window；10. sample cell；11. ginseng
Compare pond；12. the first completely reflecting mirror；13. the second completely reflecting mirror；14. the 3rd completely reflecting mirror；15. the 4th completely reflecting mirror；16. outgoing
Optical fiber；17. light path switching switch；18. photodiode detector.
Embodiment
Below by embodiment, technical scheme is described in further detail.
Contain various pollutants in water body to be measured, and different pollutants is each not for the degree of absorption and scattering degree of light
It is identical, referring to Lambert-Beer's law：
Wherein, A is absorbance, I0For incident intensity, I is transmitted intensity, and T is transmissivity, and ε is molar absorptivity system
Number, it under certain wavelength is a constant to a certain compound, can weigh degree of absorption of the measured matter to light, and b is inhales
Light path is received, c is the concentration of extinction material.Because the pollution parameters of various concentrations correspond to different scattered signal and transmission signal,
Thus quantitative analysis can be carried out to pollution parameters by the signal intensity of scattered signal and transmission signal, pass through the difference of acquisition
Particular kind of relationship setting algorithms of different between signal and water-quality constituents, the concentration of every pollution parameters in water body to be measured is conversed,
Chemically reacted without relying on.
According to above-mentioned principle, as shown in figure 1, the invention provides a kind of wide spectrum Multiparameter water quality monitoring system, including
System control device, broad spectrum light source 1, light path detection device, electrical measurement device, data processing and display device.
Specifically, the broad spectrum light source 1 includes the xenon flash lamp being connected with the system control device, it is preferred that institute
State the L13651-01 light source modules that xenon flash lamp is HAMAMATSU companies；The broad spectrum light source also includes peripheral circuit, institute
Stating peripheral circuit includes the power supply that DC voltage is 11-28V, and DC voltage is 4.5-5.5V pulse triggering signal and direct current
Voltage is 3.2-4.8V reference voltage.The peripheral circuit is connected with the system control device, is controlled and is filled in the system
The xenon flash lamp is driven to send emergent light under the control put, the frequency range of the emergent light includes ultraviolet light, visible ray and infrared
Light, the wavelength of the emergent light is 185-2000nm.
The system control device controls connection broad spectrum light source, the electrical measurement device and the number respectively
According to processing and display device；Specifically, the system control device, light source pulse driving letter is produced using micro-control unit MCU
Number, measuring control signal, data show signal and processing control signal, be respectively used to drive the broad spectrum light source 1 to launch
Emergent light, the measurement of the control electrical measurement device and the control data processing and the processing of display device and display,
Preferably, the chip model of the micro-control unit MCU is STM32F103VET6.Due to the feature of different material absorption spectrum
Wavelength is different, and spectrum used is wider, and more wavelength can be had by also implying that, correspond to more test substances.
The present invention measurement procedure be：The emergent light of the broad spectrum light source 1 in the light path detection device by treating
Survey water body is converted to optical system for testing and is incident to the electrical measurement device；The emergent light of the broad spectrum light source passes through the light path
Standard water body in detection device is converted to reference path and is incident to the electrical measurement device；The electrical measurement device is by institute
State optical system for testing and the reference path is converted to test electric signal and reference electrical signal；The data processing and display device,
The concentration of the parameter to be measured and parameter to be measured in water body to be measured is obtained according to the test electric signal and the reference electrical signal,
And show.
Specifically, using reference electrical signal as compensating approach data, according to the test electric signal and described telecommunications is referred to
Number difference draw parameter species and concentration in water body to be measured.This is due to contain a variety of parameters to be measured in water body to be measured, and
The characteristic wavelength of different parameters to be measured is different, and the degree of absorption and scattering degree for light are also different, are reflected in telecommunications
It is number upper be exactly the test electric signal corresponding to different parameters to be measured can be relative to the different degrees of change of reference electrical signal generation
Change, so as to can determine that the species of parameter to be measured according to the test electric signal to change；Then according to the test electric signal
Signal intensity the concentration of the parameter to be measured is determined relative to the attenuation degree of the reference electrical signal.
Specifically, as shown in Fig. 2 the light path detection device includes transmitting receiving unit, reaction member and reflector element；
The transmitting receiving unit includes optical splitter and optical receiver；The reaction member includes the sample pool 10 built with water body to be measured
With the reference cell 11 built with standard water body, the both ends of the sample pool 10 and the reference cell 11 are respectively provided with optical transmission window 9；Institute
Stating reflector element includes corresponding to one end optical transmission window 9 of sample pool 10 respectively and one end optical transmission window 9 of the reference cell 11 is set
The reflection unit put；
The emergent light of the broad spectrum light source after the optical splitter via being divided into two-way emergent light；Emergent light enters institute all the way
After stating the reaction of sample pool 10, the sample pool 10 is reflected back by the reflection unit and reacted, then is entered by the one of the optical receiver
Penetrate end reception and form optical path；After another way emergent light enters the reference cell 11 reaction, it is reflected back by the reflection unit
The reference cell 11 reacts, then is received by another incidence end of the optical receiver and form reference path.
Preferably, the transmitting receiving unit also includes the first collimation lens that the corresponding exit end of optical splitter two is set
5 and the 3rd collimation lens 7, and the second collimation lens 6 for setting of the corresponding incidence end of optical receiver two and the 4th collimation it is saturating
Mirror 8.
Specifically, the optical splitter is y-type optical fiber 2；The optical receiver includes the first incident optical 3 and the second incident light
Fibre 4, light path switching switch 17 and the output optical fiber 16, the control of light path switching switch 17 first incident optical 3 and described
Second incident optical 4 is alternately connected with the output optical fiber 16, by the optical system for testing or the reference path alternately with it is described
Electrical measurement device is connected.
Specifically, the reflection unit includes optical system for testing reflection unit and reference path reflection unit, the test light
Road reflection unit includes the first completely reflecting mirror 12 and the second completely reflecting mirror 13 being correspondingly arranged, the reference path reflection unit bag
Include the 3rd completely reflecting mirror 14 and the 4th completely reflecting mirror 15 being correspondingly arranged.
Further, photodiode detector is provided with the sample pool 10 and the reference cell 11, it is described
Photodiode detector 18 is used to measure perpendicular to the optical path or the scattering light of the reference path and is sent to institute
State electrical measurement device.
Specifically, as shown in figure 3, the electrical measurement device include on-site programmable gate array FPGA, photodetector,
Drive circuit, buffer, A/D change-over circuits and RAM storage chips,
The on-site programmable gate array FPGA is used for the clock signal for generating drive circuit and generation RAM storage chips
Read-write control signal, it is preferred that the fpga chip model is EP2C8Q208C8N；
The drive circuit drive the photodetector by the optical system for testing in the presence of the clock signal and
The reference path is converted to test electric signal and reference electrical signal；Preferably, the drive circuit chip is 74HC541；
The photodetector uses the S11639-01 type complementary cmos type detectors of HAMAMATSU companies, the complementation
CMOS-type detector only needs to input Clk clock signals, ST the start-of-pulsing signals power supply related to configuration, what it was exported
Clk_trig signals can be used for control ADC samplings；
The buffer is used to the test electric signal, the reference electrical signal carrying out impedance matching and signal condition,
To be converted into the application signal of the A/D change-over circuits；
The test electric signal and the reference electrical signal are converted to data signal and are stored in institute by the A/D change-over circuits
State in RAM storage chips；
Preferably, the buffer circuits chip model is LT1818；The A/D change-over circuits chip model is
AD9235, exported using 12 parallel-by-bits, highest sampling rate is 20MHz, and transformed error is ± 0.4LSB, is supplied using 3V single supplies
Electricity；The model of the RAM chip is IS61LV3216L, access time 10-20ns, memory space 512K, is CMOS-type static state
RAM, typical power consumption during work is 130mW, and power consumption when standby then only has 150 μ W.
Specifically, the wide spectrum Multiparameter water quality monitoring system also includes locating module and data transmission module, it is described
Locating module is used for the geographical position for positioning the wide spectrum Multiparameter water quality monitoring system, and the data transmission module is used for will
The concentration in the geographical position of the wide spectrum Multiparameter water quality monitoring system, the parameter to be measured in water body to be measured and parameter to be measured
Send to Cloud Server, for user's remote operation.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (10)
- A kind of 1. wide spectrum Multiparameter water quality monitoring system, it is characterised in that：Including system control device, broad spectrum light source, light Road detection device, electrical measurement device, data processing and display device；The emergent light of the broad spectrum light source is incident to the electrical measurement via the water body to be measured in the light path detection device Device, form optical system for testing；The emergent light of the broad spectrum light source is incident to the electrical measurement via the standard water body in the light path detection device Device, form reference path；The electrical measurement device, for the optical system for testing and the reference path to be converted into test electric signal and with reference to electricity Signal；The data processing and display device, obtained according to the test electric signal and the reference electrical signal in water body to be measured The concentration of parameter to be measured and parameter to be measured, and show；The system control device controls at the connection broad spectrum light source, the electrical measurement device and the data respectively Reason and display device.
- 2. wide spectrum Multiparameter water quality monitoring system according to claim 1, it is characterised in that：The light path detection device includes transmitting receiving unit, reaction member and reflector element；The transmitting receiving unit includes optical splitter and optical receiver；The reaction member includes the sample pool built with water body to be measured and the reference cell built with standard water body, the sample pool Optical transmission window is respectively provided with the both ends of the reference cell；The reflector element includes corresponding to described sample pool one end optical transmission window respectively and described reference cell one end optical transmission window is set The reflection unit put；The emergent light of the broad spectrum light source after the optical splitter via being divided into two-way emergent light；After emergent light enters sample pool reaction all the way, the sample pool is reflected back by the reflection unit and reacted, then by institute The incidence end for stating optical receiver receives to form optical path；After another way emergent light enters reference cell reaction, the reference cell is reflected back by the reflection unit and reacted, then by Another incidence end of optical receiver receives to form reference path.
- 3. wide spectrum Multiparameter water quality monitoring system according to claim 2, it is characterised in that：The transmitting receiving unit Also include the first collimation lens and the 3rd collimation lens that the corresponding exit end of optical splitter two is set, and the corresponding light connects Receive the 3rd collimation lens and the 4th collimation lens that the incidence end of device two is set.
- 4. the wide spectrum Multiparameter water quality monitoring system according to Claims 2 or 3, it is characterised in that：The optical splitter is Y Type optical fiber；The optical receiver includes the first incident optical and the second incident optical, light path switching switch and the output optical fiber, the light Road switching switch controls first incident optical and second incident optical to be alternately connected with the output optical fiber, by described in Optical system for testing or the reference path are alternately connected with the electrical measurement device.
- 5. wide spectrum Multiparameter water quality monitoring system according to claim 2, it is characterised in that：The reflection unit includes Optical system for testing reflection unit and reference path reflection unit, what the optical system for testing reflection unit included being correspondingly arranged first is all-trans Mirror and the second completely reflecting mirror are penetrated, the reference path reflection unit is all-trans including the 3rd completely reflecting mirror being correspondingly arranged and the 4th Penetrate mirror.
- 6. according to the wide spectrum Multiparameter water quality monitoring system described in claim any one of 1-5, it is characterised in that：The sample Photodiode detector is provided with pond and the reference cell.
- 7. wide spectrum Multiparameter water quality monitoring system according to claim 1, it is characterised in that：The electrical measurement device Including on-site programmable gate array FPGA, photodetector, drive circuit, buffer, A/D change-over circuits and RAM storage chips,The on-site programmable gate array FPGA is used for the clock signal for generating drive circuit and the reading for generating RAM storage chips Write control signal；The drive circuit drives the photodetector by the optical system for testing and described in the presence of the clock signal Reference path is converted to test electric signal and reference electrical signal；The buffer is used to the test electric signal, the reference electrical signal carrying out impedance matching and signal condition, to turn Change the application signal of the A/D change-over circuits into；The A/D change-over circuits by the test electric signal and the reference electrical signal be converted to data signal be stored in it is described In RAM storage chips.
- 8. wide spectrum Multiparameter water quality monitoring system according to claim 1, it is characterised in that：The broad spectrum light source bag Include the xenon flash lamp being connected with the system control device.
- 9. wide spectrum Multiparameter water quality monitoring system according to claim 1, it is characterised in that：Also include being used to position institute State the locating module in the geographical position of wide spectrum Multiparameter water quality monitoring system.
- 10. wide spectrum Multiparameter water quality monitoring system according to claim 9, it is characterised in that：Also include data transfer Module, the data transmission module are used in the geographical position of the wide spectrum Multiparameter water quality monitoring system, water body to be measured Parameter to be measured and the concentration of parameter to be measured send to Cloud Server.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109115697A (en) * | 2018-09-30 | 2019-01-01 | 杭州电子科技大学 | A kind of multi-parameter water-quality on-Line Monitor Device of aggregate optical probe |
| CN109187380A (en) * | 2018-07-25 | 2019-01-11 | 北京农业智能装备技术研究中心 | A kind of water quality detector, water pollution emission source monitor system and method |
| 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 |
| CN114166769A (en) * | 2021-11-12 | 2022-03-11 | 汉威科技集团股份有限公司 | Ultraviolet-visible spectrum water quality multi-parameter monitoring system |
| CN115791642A (en) * | 2022-11-17 | 2023-03-14 | 浙江西热利华智能传感技术有限公司 | Photoelectric conversion system and method |
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