CN208350625U - A kind of water quality on-line monitoring device - Google Patents
A kind of water quality on-line monitoring device Download PDFInfo
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- CN208350625U CN208350625U CN201820711016.7U CN201820711016U CN208350625U CN 208350625 U CN208350625 U CN 208350625U CN 201820711016 U CN201820711016 U CN 201820711016U CN 208350625 U CN208350625 U CN 208350625U
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Abstract
The utility model relates to a kind of water quality on-line monitoring devices, including water sample pretreatment system, water sample detection system, control system and multiple cuvettes；The water sample pretreatment system includes temperature control mechanism and reagent disc, and the temperature control mechanism is used to control the temperature of sample to be tested in the cuvette, is placed in the reagent disc a variety of for detecting the reagent of water sample；The water sample detection system includes constant-current source circuit, LED light source, photoelectric sensor and more electrochemical sensor integration probes；The constant-current source circuit is connect with LED light source and more electrochemical sensor integration probes respectively；LED light source and photoelectric sensor are located on two parallel sides of the cuvette, and the constant-current source circuit controls its opening and closing by the control system；More electrochemical sensor integration probes are inserted in one of in the cuvette；Can be with the multiple parameters of real time on-line monitoring water quality, process is quick, result is accurate.
Description
Technical field
The utility model relates to a kind of water monitoring device, in particular to a kind of water quality on-line monitoring device.
Background technique
Water is not only necessary condition for the survival of mankind, and the quality of water quality will also directly affect the growth shape of animals and plants
Condition.When water degradation, aquatic products are easy to happen lesion, or even dead；And plantation is with water that its deteriorating water quality then may cause agriculture
Crop failure even deterioration.Therefore in agricultural production process, it would be desirable to perfect monitoring water quality on line system is established,
With it is comprehensive, accurate, understand water quality condition in real time, and according to aquatic animals and plants to food, oxygen, pH value, salinity, oxidation also
The demand of former current potential adjusts water quality in time, to meet the growth demand of animals and plants to obtain excellent product.
The monitoring content of agricultural water mainly includes conventional water quality parameter and nutritive salt parameter, and conventional water quality parameter includes electricity
Conductance, pH value, temperature, total soluble matter (TDS) etc., nutritive salt parameter include total phosphorus content, total nitrogen content, ammonia-nitrogen content (NH3-
N) etc..
To the difference because detecting evaluation index of agricultural water evaluation index, the method for use is also different.City at present
Common water quality monitoring mode is all personal monitoring on face, needs monitoring device by carrying profession or to be sampled to laboratory complete
The monitoring of pairs of water quality, the device is complicated for this mode, expensive, operating process is cumbersome, the technical requirement to operator
It is higher, and monitoring result accuracy is not high, can not meet the requirement of on-line real time monitoring.
In addition, monitor Testing index is relatively simple at this stage, water quality condition just can determine that after completing a series of tests,
Speed is slow and at high cost, detection while cannot achieve multiple evaluation indexes, is unable to satisfy the on-line automatic real-time detection of multi-parameter
Requirement, effectively water quality cannot be supervised, be not suitable for water quality monitoring popularization and application.
To sum up, in aquaculture and field of agricultural cultivation, there is an urgent need to a kind of sensitive, quick, efficient, economical, easy
On-Line Monitor Device, especially portable multi-function water quality on-line monitoring device, to understand water quality condition in real time.
Utility model content
The utility model in view of the deficiency of the prior art, provides a kind of sensitive, quick, efficient, economical, simple
Water quality on-line monitoring device.
The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of water quality on-line monitoring device, including water
Sample pretreatment system, water sample detection system, control system and multiple cuvettes；
The water sample pretreatment system includes temperature control mechanism and reagent disc, and the temperature control mechanism is for controlling the cuvette
The temperature of interior sample to be tested, the sample to be tested are the reagent discs by being formed after suitable reagent is added into water sample
It is inside placed with a variety of for pre-processing the reagent of water sample；
The water sample detection system includes constant-current source circuit, LED light source, photoelectric sensor and more electrochemical sensor collection
At probe；The LED light source and the photoelectric sensor include multiple, and the photoelectric sensor and the LED light source
It corresponds, the light beam of multiple LED light source transmitting different wave lengths is respectively used to total nitrogen in detection water sample, total phosphorus and COD
Content, the constant-current source circuit are connect with LED light source and more electrochemical sensor integration probes respectively；At least one described ratio
Color ware is respectively equipped at least one LED light source and photoelectric sensor on two parallel sides；The constant-current source circuit is by institute
It states control system and controls its opening and closing；More electrochemical sensor integration probes are inserted in one of in the cuvette；
The control system includes current-to-voltage converting circuit, amplifying circuit, analog to digital conversion circuit, memory, micro process
Device, display screen and host computer PC end, the current-to-voltage converting circuit is separately connected the photoelectric sensor and more electrochemistry pass
Sensor integration probe, the current-to-voltage converting circuit are also connected with amplifying circuit, the amplifying circuit also with analog-to-digital conversion
Circuit is connected, and analog-digital conversion circuit as described is connected with the input terminal of the microprocessor, the output end of the microprocessor
It is connected respectively with the memory, display screen and host computer PC end.
It further, further include water sample sampling system, the water sample sampling system includes suction pump and liquidometer meter, described
The water inlet of suction pump is connect by the first solenoid valve with flow cell, and the flow cell is provided with water to be detected, the suction pump
Water outlet is connect with multiple cuvettes respectively by the level gauge meter, first solenoid valve and the suction pump point
It is not controlled by the microprocessor.
Further, the suction pump is peristaltic pump.
Further, the flow cell includes two ports, and two ports of the flow cell are equipped with filter screen.
Further, the cuvette include four the first cuvettes being arranged successively, the second cuvette, third cuvette and
4th cuvette, the level gauge meter pass through second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th solenoid valve respectively
It is connect with the upper end of first cuvette, the second cuvette, third cuvette and the 4th cuvette, the second solenoid valve,
Third solenoid valve, the 4th solenoid valve, the 5th solenoid valve are controlled by the microprocessor respectively.
It further, further include the first pH sensor, the first pH sensor is set in first cuvette, Duo Zhongsuo
State reagent include sodium hydroxide solution spaced apart from each other, hydrochloric acid solution, L-AA vitamin c solution, molybdic acid ammonia solution and
Two parts of potassium persulfate solutions, two parts of potassium persulfate solutions are denoted as the first potassium persulfate solution respectively and the second potassium peroxydisulfate is molten
Liquid；
For first cuvette for detecting total nitrogen content in water sample, first potassium persulfate solution, sodium hydroxide are molten
Liquid, hydrochloric acid solution pass through piping connection by multi-channel electromagnetic valve and the first cuvette；Second cuvette is for detecting water
Total phosphorus content in sample, second potassium persulfate solution, L-AA vitamin c solution, molybdic acid ammonia solution pass through described more
Channel solenoid valve and the second cuvette pass through piping connection；The third cuvette is for detecting COD total amount in water sample, and described the
Four cuvettes are used to detect the content and conductivity, pH value and temperature of total soluble matter in water sample (TDS).
Further, more electrochemical sensor integration probes include temperature sensor, the 2nd pH sensor, conductivity
Sensor and TDS sensor；More electrochemical sensor integration probes are located in the 4th cuvette.
Further, the temperature control mechanism includes warm table and cooling platform, and the warm table and the cooling platform are respectively positioned on institute
The lower section of the first cuvette and the second cuvette is stated, the warm table and the lower end for cooling down platform are respectively equipped with the first elevator
Structure and the second elevating mechanism, first elevating mechanism are able to drive warm table and heat first cuvette or/and the second ratio
Color ware, second elevating mechanism are able to drive cooling first cuvette of the cooling platform or/and the second cuvette.
Further, first elevating mechanism and second elevating mechanism are all made of linear motor.
Further, the warm table and the cooling platform are thermostatic platform, and the temperature of the warm table is 120 DEG C, described
The temperature of cooling platform is 25 DEG C.
Further, the LED light source includes ultraviolet leds light source and visible LED light source；The photoelectric sensor
Including silicon based opto-electronics diode and gallium nitride base photodiode；Wherein, two pole of ultraviolet leds light source and gallium nitride base photoelectricity
Manage it is corresponding, for sensing the light intensity signal of UV wavelength range, it is seen that light LED light source is corresponding with silicon based opto-electronics diode,
For sensing the light intensity signal of visible-range；
Two parallel sides of first cuvette are respectively equipped with a ultraviolet leds light source and a gallium nitride base
Two parallel sides of photodiode, second cuvette are respectively equipped with a visible LED light source and a silicon substrate
Photodiode；One side of the third cuvette is set there are two LED light source, respectively ultraviolet leds light source and visible
Light LED light source, another side are set there are two photoelectric sensor, respectively two pole of gallium nitride base photodiode and silicon based opto-electronics
Pipe.
Further, LED light source corresponding with first cuvette is denoted as the first LED light source, the first LED light source hair
The light beam wavelength penetrated is 220nm；LED light source corresponding with second cuvette is denoted as the second LED light source, and described second
The light beam wavelength of LED light source transmitting is 700nm；Two LED light sources corresponding with third cuvette are denoted as third LED light source respectively
Light beam wavelength with the 4th LED light source, the 3rd LED light source transmitting is 254nm, the light beam of the 4th LED light source transmitting
Wavelength is 546nm；
Photoelectric sensor corresponding with the first LED light source, is denoted as the first photoelectric sensor, opposite with the 2nd LED light source
The photoelectric sensor answered is denoted as the second photoelectric sensor, and photoelectric sensor corresponding with third LED light source is denoted as third light
Electric transducer, photoelectric sensor corresponding with the 4th LED light source, is denoted as the 4th photoelectric sensor.
Further, further include black seal casinghousing, the water sample pretreatment system, water sample detection system, control system and
Multiple cuvettes are set in the black seal casinghousing, and setting is protected from light layer between multiple cuvettes, described to keep away
Photosphere can separate corresponding photoelectric sensor and LED light source.
It further, further include ultrapure water cleaning system and Mead-Bauer recovery system, the ultrapure water cleaning system includes ultrapure
Pond and the 6th solenoid valve, the ultrapure pond are connect by the 6th solenoid valve with the suction pump；The devil liquor recovery
System includes waste liquid pool, first cuvette, the second cuvette, third cuvette and the 4th cuvette lower end pass through respectively
7th solenoid valve, the 8th solenoid valve, the 9th solenoid valve and the tenth solenoid valve are connect with the waste liquid pool, the 7th solenoid valve,
8th solenoid valve, the 9th solenoid valve and the tenth solenoid valve pass through the microprocessor respectively and control.
Further, level switch is equipped in the waste liquid pool, the bottom of the waste liquid pool is equipped with the 11st solenoid valve, when
Alarm signal is issued when water reaches warning line in waste liquid pool, microprocessor exports a high level signal and opens the 11st solenoid valve,
It is automatically drained out water, subsequent microprocessor exports a low level signal and closes the 11st solenoid valve.
It further, further include that the power supply inside black seal casinghousing is set and is arranged outside the black seal casinghousing
Solar panel, the solar panel is connected with the power supply.
Beneficial effect is in the utility model:
1) electrochemical sensor and multi-wavelength light spectral technology are combined together, and can detect total phosphorus in water sample, total nitrogen, ammonia simultaneously
Nitrogen (NH3- N), total soluble matter (TDS), multiple water quality parameters, the process such as the content of COD and conductivity, pH value, temperature it is quick
It is sensitive, as a result accurately, the variation of water quality can be monitored in real time；
2) volume of the present apparatus is conducive to move at any time less than 1 cubic metre；
3) light source is made using the lower monochromatic LED of price, and light path system is relatively simple, production cost is relatively low,
And low energy consumption for LED light source, long service life, meets the needs of term underwater monitoring；
4) it can calibrate automatically, sampling, automatic test sample, automatic cleaning automatically, whole process does not need technical support, and it is easy to operate,
Especially suitable for planting industry, aquaculture.
The course of work of the utility model is as follows: including the following steps:
All solenoid valves are closed by control system, then place the monitoring device by step 1, preparation
At water sample to be measured and connect power supply；
Step 2, automatic calibration, after power supply is connected, microprocessor issues electrical signal first, opens constant-current source circuit, point
Each LED light source is not lighted, and is controlled LED light source and irradiated with continuous or impulse form, it is defeated after photoelectric sensor receives optical signal
Current signal out is transferred to amplifying circuit after current-to-voltage converting circuit is converted, and automatically adjusts and amplifies by amplifying circuit
It is transferred to analog to digital conversion circuit after multiple and carries out analog-to-digital conversion, then transmits a signal to microprocessor, it is pre- with COD, TN, TP
If value compares, contrastive colours ware is calibrated；After calibration, microprocessor issues electrical signal, and constant-current source circuit is closed；
Step 3, water sampling, water sample to be measured flows into flow cell by filter screen, after calibration, microprocessor output one
A high level signal opens the first solenoid valve and suction pump, and under the action of suction pump, water sample to be measured passes through liquidometer meter
(microprocessor control second is separately flowed into the first cuvette, the second cuvette, third cuvette and the 4th cuvette after quantitative
Solenoid valve, third solenoid valve, the 4th solenoid valve and the 5th solenoid valve switch), complete the acquisition of water sample；
Step 4, water sample pretreatment, and under control of the microprocessor, the water sample in the first cuvette and the second cuvette
The pretreatment of water sample is completed by pretreatment system, preprocessing process is as follows: microprocessor issues electrical signal, multi-channel electromagnetic
Valve is opened, and is quantitatively adding potassium persulfate solution and sodium hydroxide solution to the first cuvette respectively, is quantitatively added to the second cuvette
Enter potassium persulfate solution；Subsequent microprocessor issues control signal, controls the first elevating mechanism for warm table and rises to the first colorimetric
The bottom of ware and the second cuvette, 120 DEG C of warm table constant temperature, to the first cuvette and the second cuvette heated at constant temperature 30 minutes,
Nitride during this in water sample to be measured will convert to as nitrate ion, and phosphide is transformed into phosphate anion；Heating knot
Shu Hou, under control of the microprocessor, the first elevating mechanism fall warm table, and the second elevating mechanism control cooling platform rises straight
To the first cuvette of contact and the second cuvette, temperature fall time is concurrently set, it will be to be measured in the first cuvette and the second cuvette
Water sample drops to room temperature；
Under room temperature, firstly, microprocessor issues order, multi-channel electromagnetic valve is opened, and L- is added to the second cuvette
Ascorbic acid usp/bp solution, subsequent microprocessor control constant-current source circuit open LED light source corresponding with the second cuvette and
Photoelectric sensor, i.e. the second LED light source and the second photoelectric sensor measure the absorbance in the second cuvette before solution changes color,
It is then turned off constant-current source circuit；It issues and orders to multi-channel electromagnetic valve again, a certain amount of molybdenum acid ammonia is added to the second cuvette
Solution；At the same time, microprocessor issues order, instills hydrochloric acid solution until microprocessor passes through the first pH to the first cuvette
Sensor sensing in the range of 2-3, completes the pretreatment of water sample to pH value.
Step 5, data acquire, and after the completion of solution allocation to be measured, microprocessor issues electrical signal, open constant-current source electricity
Each LED light source, photoelectric sensor and more electrochemical sensor probes are lighted in road respectively, and control LED light source with continuous or arteries and veins
Form irradiation is rushed, after photoelectric sensor receives optical signal, output current signal is transferred to amplification after Current Voltage is converted
Circuit is transferred to analog to digital conversion circuit after amplifying circuit automatically adjusts amplification factor and carries out analog-to-digital conversion, then by signal
It is transferred to microprocessor and obtains the information of water sample COD, TN, TP to be measured, wherein be again turned on second the second LED light of cuvette
Source and the second photoelectric sensor, can measure the absorbance in the second cuvette after solution changes color in 700nm, become by combining
Absorbance before and after color can calculate the content of TP in detected water sample, while microprocessor is by controlling more electrochemical sensors
Probe, collects the ammonia nitrogen (NH of water sample to be measured3- N), the letter of the content of total soluble matter (TDS) and conductivity, pH value, temperature
Breath after microprocessor is handled these data, is conveyed to memory and carries out data storage, while will by liquid crystal display
Total nitrogen, total phosphorus, COD, the ammonia nitrogen (NH of water sample to be measured3- N), the content and conductivity, pH value, temperature of total soluble matter (TDS)
Information carry out real-time display.
After the completion of step 6, one group of data acquisition, microprocessor exports high level signal, opens second solenoid valve extremely
Tenth solenoid valve makes in ultrapure water inflow pipe, cleans to entire monitor, and the solution detected is made to flow into waste liquid pool；
Subsequent microprocessor issues electrical signal, closes all solenoid valves, carries out next group of water sampling, water sample pretreatment and data
Acquisition.
The default sample time of device be 1 hour, but can according to the specific situation of change of water quality to the sampling interval when
Between be adjusted；If water quality changes relatively acutely within certain time, sampling interval duration can reduce, with real-time monitoring water
The variation of sample；Within certain time, if change of water quality is more steady, to extend system service life, it can increase between sampling
Every the time.
The both ends of flow cell only pass through filter screen and separate with extraneous water quality, effect of the extraneous water body in pressure itself or flow velocity
It is lower to flow into flow cell through filter screen, it is flowed out from other side filter screen, the update of flow cell water sample to be measured relies primarily on extraneous water body
Itself flow velocity or pressure change are realized.
When monitoring each component parameter of water sample to be measured not in the reasonable scope, control system is sent out to microprocessor first
Instruction is accused out, closes constant-current source circuit, then opens the 7th solenoid valve to the tenth solenoid valve, flows into the water in cuvette useless
In liquid pool, optical signal when LED light source measures anhydrous is opened again at this time, carry out automatic calibration described in step 2, then monitor again
Water quality.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of monitoring device in the utility model；
Fig. 2 is the flow diagram of the content detection principle of total phosphorus, total nitrogen, COD in water quality in the utility model；
In the accompanying drawings, list of designations represented by each label is as follows: 1, the first solenoid valve, 2, second solenoid valve, 3,
Third solenoid valve, the 4, the 4th solenoid valve, the 5, the 5th solenoid valve, the 6, the 6th solenoid valve, the 7, the 7th solenoid valve, the 8, the 8th solenoid valve,
9, the 9th solenoid valve, the 10, the tenth solenoid valve, the 11, the 11st solenoid valve, the 12, first cuvette, the 13, second cuvette, 14,
Three cuvettes, the 15, the 4th cuvette, 16, LED light source, 17, warm table, 18, cooling platform, 19, more electrochemical sensors it is integrated
Probe, 20, linear motor, 21, photoelectric sensor.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
As Figure 1-Figure 2, a kind of water quality on-line monitoring device, including water sample pretreatment system, water sample detection system, control
System processed and 4 cuvettes, 4 cuvettes are respectively the first cuvette 12, the second cuvette 13, third being arranged successively
Cuvette 14 and the 4th cuvette 15；
The water sample pretreatment system includes temperature control mechanism and reagent disc, and the temperature control mechanism is for controlling the cuvette
The temperature of interior sample to be tested is placed in the reagent disc a variety of for pre-processing the reagents of water sample；
The water sample detection system includes constant-current source circuit (being not drawn into figure), LED light source 16,21 and of photoelectric sensor
More electrochemical sensor integration probes 19；The LED light source and the photoelectric sensor 21 include 4, and the photoelectric transfer
Sensor 21 and the LED light source correspond, the constant-current source circuit respectively with each LED light source and more electrochemical sensor collection
It is connected at probe 19；The constant-current source circuit controls its opening and closing by microprocessor；More electrochemical sensor integration probes 19
It is inserted into the 4th cuvette 15；
The control system includes current-to-voltage converting circuit, amplifying circuit, analog to digital conversion circuit, memory, micro process
Device, display screen and host computer PC end, the current-to-voltage converting circuit is separately connected the photoelectric sensor and more electrochemistry pass
Sensor integration probe, the current-to-voltage converting circuit are also connected with amplifying circuit, the amplifying circuit also with analog-to-digital conversion
Circuit is connected, and analog-digital conversion circuit as described is connected with the input terminal of the microprocessor, the output end of the microprocessor
It is connected respectively with the memory, display screen and host computer PC end.
It further include water sample sampling system, the water sample sampling system includes suction pump and liquidometer meter, the suction pump
Water inlet connect with flow cell by the first solenoid valve 1, the flow cell is provided with water to be detected, the water outlet of water pump
Connect respectively with multiple cuvettes by the level gauge meter, first solenoid valve 1 and the suction pump respectively by
The microprocessor control；The suction pump is peristaltic pump.
The flow cell includes two ports, and two ports of the flow cell are equipped with filter screen.
The level gauge meter passes through second solenoid valve 2, third solenoid valve 3, the 4th solenoid valve 4, the 5th solenoid valve 5 respectively
It is connect with the upper end of first cuvette 12, the second cuvette 13, third cuvette 14 and the 4th cuvette 15, described second
Solenoid valve 2, third solenoid valve 3, the 4th solenoid valve 4, the 5th solenoid valve 5 are controlled by the microprocessor respectively.
It further include the first pH sensor, the first pH sensor is set in first cuvette 12, a variety of examinations
Agent includes sodium hydroxide solution spaced apart from each other, hydrochloric acid solution, L-AA vitamin c solution, molybdic acid ammonia solution and two parts
Potassium persulfate solution, two parts of potassium persulfate solutions are denoted as the first potassium persulfate solution and the second potassium persulfate solution respectively；
First cuvette 12 is for detecting total nitrogen content in water sample, first potassium persulfate solution, sodium hydroxide
Solution, hydrochloric acid solution pass through piping connection by multi-channel electromagnetic valve and the first cuvette 12；Second cuvette 13 is used for
Total phosphorus content in water sample is detected, second potassium persulfate solution, L- ascorbic acid usp/bp solution, molybdic acid ammonia solution pass through
The multi-channel electromagnetic valve and the second cuvette 13 pass through piping connection；The third cuvette 14 is for detecting COD in water sample
Total amount, more electrochemical sensor integration probes 19 include temperature sensor, the 2nd pH sensor, conductivity sensor with
And TDS sensor, the 4th cuvette 15 are used to detect the content and conductivity, pH value of total soluble matter in water sample (TDS)
And temperature.
The temperature control mechanism includes warm table 17 and cooling platform 18, and the warm table 17 and the cooling platform 18 are respectively positioned on
The lower end of the lower section of first cuvette 12 and the second cuvette 13, the warm table 17 and the cooling platform 18 is respectively equipped with
First elevating mechanism and the second elevating mechanism, first elevating mechanism are able to drive warm table 17 and heat first cuvette
12 or/and second cuvette 13, second elevating mechanism be able to drive cooling first cuvette of the cooling platform or/and
Second cuvette；First elevating mechanism and second elevating mechanism are all made of linear motor.
The warm table 17 and the cooling platform 18 are thermostatic platform, and the temperature of the warm table 17 is 120 DEG C, described
The temperature of cooling platform 18 is 25 DEG C.
The LED light source 16 includes 2 ultraviolet leds light sources and 2 visible LED light sources；The photoelectric sensor
Including 2 silicon based opto-electronics diodes and 2 gallium nitride base photodiodes；Wherein, ultraviolet leds light source and photodiode phase
It is corresponding, for sensing the light intensity signal of UV wavelength range, it is seen that light LED light source is corresponding with silicon based opto-electronics diode, is used for
Sense the light intensity signal of visible-range；The photodiode is the photodiode of gallium nitride material and technique；
Two parallel sides of first cuvette are respectively equipped with a ultraviolet leds light source and a gallium nitride base
Two parallel sides of photodiode, second cuvette are respectively equipped with a visible LED light source and a silicon substrate
Photodiode；One side of the third cuvette is set there are two LED light source, respectively ultraviolet leds light source and visible
Light LED light source, sets that there are two photoelectric sensors, respectively gallium nitride base photodiode on another side in parallel
With silicon based opto-electronics diode.
LED light source corresponding with first cuvette is denoted as the first LED light source, the light beam of the first LED light source transmitting
Wavelength is 220nm；LED light source corresponding with second cuvette is denoted as the 2nd LED light source, the second LED light source hair
The light beam wavelength penetrated is 700nm；Two LED light sources corresponding with third cuvette are denoted as third LED light source and the 4th LED respectively
The light beam wavelength of light source, the third LED light source transmitting is 254nm, and the light beam wavelength of the 4th LED light source transmitting is
546nm；
Photoelectric sensor 21 corresponding with the first LED light source, is denoted as the first photoelectric sensor, with the second LED light source phase
Corresponding photoelectric sensor 21, is denoted as the second photoelectric sensor, and photoelectric sensor 21 corresponding with third LED light source is denoted as
Third photoelectric sensor, photoelectric sensor 21 corresponding with the 4th LED light source, is denoted as the 4th photoelectric sensor.
It further include black seal casinghousing, the water sample pretreatment system, water sample detection system, control system and multiple described
Cuvette is set in the black seal casinghousing, and setting is protected from light layer between multiple cuvettes, and the layer that is protected from light can
Corresponding photoelectric sensor and LED light source are separated.
It further include ultrapure water cleaning system and Mead-Bauer recovery system, the ultrapure water cleaning system includes ultrapure pond and
Six solenoid valves 6, the ultrapure pond are connect by the 6th solenoid valve 6 with the suction pump；The Mead-Bauer recovery system packet
Include waste liquid pool, first cuvette 12, the second cuvette 13, third cuvette 14 and the 4th cuvette 15 lower end lead to respectively
It crosses the 7th solenoid valve 7, the 8th solenoid valve 8, the 9th solenoid valve 9 and the tenth solenoid valve 10 to connect with the waste liquid pool, the described 7th
Solenoid valve 7, the 8th solenoid valve 8, the 9th solenoid valve 9 and the tenth solenoid valve 10 are controlled by the microprocessor respectively.
Level switch is equipped in the waste liquid pool, the bottom of the waste liquid pool is equipped with the 11st solenoid valve 11, works as waste liquid
Chi Zhongshui issues alarm signal when reaching warning line, microprocessor exports a high level signal and opens the 11st solenoid valve 11, makes
Water is automatically drained out, and subsequent microprocessor exports a low level signal and closes the 11st solenoid valve 11.
It further include the sun for the power supply inside black seal casinghousing being set He being arranged in outside the black seal casinghousing
Energy solar panel, the solar panel are connected with the power supply.
The course of work of this utility model is as follows: including the following steps:
All solenoid valves are closed by control system, then place the monitoring device by step 1, preparation
At water sample to be measured and connect power supply；
Step 2, automatic calibration, after power supply is connected, microprocessor issues electrical signal first, opens constant-current source circuit, point
Each LED light source 16 is not lighted, and controls LED light source 16 and is irradiated with continuous or impulse form, and photoelectric sensor 21 receives light letter
After number, output current signal is transferred to amplifying circuit after current-to-voltage converting circuit is converted, automatic by amplifying circuit
Adjust amplification factor after be transferred to analog to digital conversion circuit carry out analog-to-digital conversion, then transmit a signal to microprocessor, with COD,
The preset value of TN, TP compare, and contrastive colours ware is calibrated；After calibration, microprocessor issues electrical signal, constant-current source circuit
It closes；
Step 3, water sampling, water sample to be measured flows into flow cell by filter screen, after calibration, microprocessor output one
A high level signal opens the first solenoid valve 1 and peristaltic pump, and under the action of peristaltic pump, water sample to be measured passes through liquidometer meter
The first cuvette 12, the second cuvette, (micro process in 13 third cuvettes 14 and the 4th cuvette 15 are separately flowed into after quantitative
Device control second solenoid valve 2, third solenoid valve 3, the 4th solenoid valve 4 and the 5th solenoid valve 5 switch), complete the acquisition of water sample；
Step 4, water sample pretreatment, under control of the microprocessor, the water in the first cuvette 12 and the second cuvette 13
Sample completes the pretreatment of water sample by pretreatment system, and specific preprocessing process is as follows: microprocessor issues electrical signal, more
Channel solenoid valve is opened, and suitable potassium persulfate solution and sodium hydroxide solution is added to the first cuvette 12 respectively, to second
Cuvette 13 is quantitatively adding suitable potassium persulfate solution；Subsequent microprocessor issues control signal, controls the first elevating mechanism
Warm table 17 is risen to the bottom of the first cuvette 12 and the second cuvette 13,120 DEG C of 17 constant temperature of warm table, to the first cuvette
12 and 13 heated at constant temperature of the second cuvette 30 minutes, the nitride during this in water sample to be measured will convert to for nitrate anion from
Son, phosphide are transformed into phosphate anion；After heating, under control of the microprocessor, the first elevating mechanism is by warm table
It falls, the second elevating mechanism control cooling platform rises until the first cuvette and the second cuvette are contacted, when concurrently setting cooling
Between, the first cuvette 12 and the second cuvette 13 are dropped into room temperature；
Under room temperature, firstly, microprocessor issues order, multi-channel electromagnetic valve is opened, and is added to the second cuvette 12
L-AA vitamin c solution, subsequent microprocessor control constant-current source circuit open the second LED light source and the second photoelectric sensing
Device, the light beam wavelength of the second LED light source transmitting are 700nm, and photoelectric sensor is silicon based opto-electronics diode, measure the second cuvette
Absorbance before interior solution changes color, is then turned off constant-current source circuit；It issues and orders to multi-channel electromagnetic valve again, to the second colorimetric
Quantitative molybdic acid ammonia solution is added in ware 12；At the same time, microprocessor issues order, and it is straight to instill hydrochloric acid solution to the first cuvette 12
To microprocessor by the first pH sensor sensing to pH value in the range of 2-3, complete the pretreatment of water sample；
Step 5, data acquire, and after the completion of solution allocation to be measured, microprocessor issues electrical signal, open constant-current source electricity
Each LED light source 16, each photoelectric sensor and more electrochemical sensor probes are lighted in road respectively, and control LED light source 16 with
The irradiation of continuous or impulse form, after photoelectric sensor receives optical signal, output current signal passes after Current Voltage is converted
It is defeated by amplifying circuit, analog to digital conversion circuit is transferred to after amplifying circuit automatically adjusts amplification factor and carries out analog-to-digital conversion, the
The light beam wavelength of one LED light source transmitting is 220nm, and the first photoelectric sensor sends the signal to microprocessor and obtains water sample to be measured
The light beam wavelength of the information of middle TN, the transmitting of the second LED light source is 700nm, and the second photoelectric sensor sends the signal to micro process
Device obtains absorbance after water sample discoloration to be measured, and the information of TP in water sample, third LED light source and the 4th LED can be obtained after being computed
The light beam wavelength that light source emits respectively is 254nm and 546nm, and third photoelectric sensor and the 4th photoelectric sensor pass signal
It is defeated by microprocessor and obtains the information of water sample COD to be measured, while microprocessor is divided by controlling more electrochemical sensor probes 19
The ammonia nitrogen (NH3-N) of water sample to be measured, the content of total soluble matter (TDS) and conductivity, pH value, the information of temperature are not collected,
After microprocessor is handled these data, it is conveyed to memory and carries out data storage, while will be to by liquid crystal display
Survey total nitrogen, total phosphorus, COD, the ammonia nitrogen (NH of water sample3- N), the letter of the content of total soluble matter (TDS) and conductivity, pH value, temperature
Breath carries out real-time display；
After the completion of step 6, one group of data acquisition, microprocessor exports high level signal, opens second solenoid valve 2 to the tenth
Solenoid valve 10 makes in ultrapure water inflow pipe, cleans to entire monitor, and the solution detected is made to flow into waste liquid pool；With
Microprocessor issues electrical signal afterwards, closes all solenoid valves, carries out the acquisition of next group of data, the default sample time of device
It is 1 hour, but sampling interval duration can be adjusted according to the specific situation of change of water quality；If water quality is at certain section
Interior variation is more violent, can reduce sampling interval duration, with the variation of real-time monitoring water sample；Within certain time, if
Change of water quality is more steady, to extend system service life, can increase sampling interval duration.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of water quality on-line monitoring device, which is characterized in that including water sample pretreatment system, water sample detection system, control system
System and multiple cuvettes；
The water sample pretreatment system includes temperature control mechanism and reagent disc, the temperature control mechanism for control in the cuvette to
The temperature of sample is placed in the reagent disc a variety of for pre-processing the reagents of water sample；
The water sample detection system, which includes that constant-current source circuit, LED light source, photoelectric sensor and more electrochemical sensors are integrated, to be visited
Head；The LED light source and the photoelectric sensor include multiple, and the photoelectric sensor and the LED light source are one by one
Corresponding, the light beam of multiple LED light source transmitting different wave lengths is respectively used to containing for total nitrogen in detection water sample, total phosphorus and COD
Amount, the constant-current source circuit are connect with LED light source and more electrochemical sensor integration probes respectively；At least one described cuvette
At least one LED light source and photoelectric sensor are respectively equipped on two parallel sides；The constant-current source circuit, photoelectric sensing
Device, LED light source, more electrochemical sensor integration probes and temperature control system are controlled by the control system；More electrochemistry
Sensor integration probe is inserted in one of in the cuvette.
2. water quality on-line monitoring device according to claim 1, which is characterized in that the control system includes Current Voltage
Conversion circuit, amplifying circuit, analog to digital conversion circuit, memory, microprocessor, display screen and host computer PC end, the electric current electricity
Voltage conversion circuit is separately connected the photoelectric sensor and more electrochemical sensor integration probes, the current-to-voltage converting circuit
Also be connected with amplifying circuit, the amplifying circuit is also connected with analog to digital conversion circuit, analog-digital conversion circuit as described with it is described
The input terminal of microprocessor is connected, the output end of the microprocessor respectively with the memory, display screen and host computer PC
End is connected.
3. water quality on-line monitoring device according to claim 2, which is characterized in that it further include water sample sampling system, it is described
Water sample sampling system includes suction pump and liquidometer meter, and the water inlet of the suction pump is connected by the first solenoid valve and flow cell
Connect, the flow cell is provided with water to be detected, the water outlet of water pump by the level gauge meter respectively with it is multiple described
Cuvette connection, first solenoid valve and the suction pump are controlled by the microprocessor respectively.
4. water quality on-line monitoring device according to claim 3, which is characterized in that the cuvette includes four and successively arranges
The first cuvette, the second cuvette, third cuvette and the 4th cuvette of column, the level gauge meter pass through the second electricity respectively
Magnet valve, third solenoid valve, the 4th solenoid valve, the 5th solenoid valve and first cuvette, the second cuvette, third cuvette and
The upper end of 4th cuvette connects, and the second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th solenoid valve are respectively by institute
State microprocessor control.
5. water quality on-line monitoring device according to claim 4, which is characterized in that it further include the first pH sensor, it is described
First pH sensor is set in first cuvette, and a variety of reagents include sodium hydroxide solution spaced apart from each other, hydrochloric acid
Solution, L-AA vitamin c solution, molybdic acid ammonia solution and two parts of potassium persulfate solutions, two parts of potassium persulfate solutions
It is denoted as the first potassium persulfate solution and the second potassium persulfate solution respectively；
First cuvette is for detecting total nitrogen content in water sample, first potassium persulfate solution, sodium hydroxide solution, salt
Acid solution passes through piping connection by multi-channel electromagnetic valve and the first cuvette；Second cuvette is total in water sample for detecting
Phosphorus content, second potassium persulfate solution, L-AA vitamin c solution, molybdic acid ammonia solution pass through the multichannel electricity
Magnet valve and the second cuvette pass through piping connection；The third cuvette is for detecting COD total amount in water sample, the 4th colorimetric
Ware is used to detect the content and conductivity, pH value and temperature of total soluble matter in water sample (TDS).
6. water quality on-line monitoring device according to claim 4, which is characterized in that the temperature control mechanism include warm table and
Cooling platform, the warm table and the cooling platform are respectively positioned on the lower section of first cuvette and the second cuvette, the heating
The lower end of platform and the cooling platform is respectively equipped with the first elevating mechanism and the second elevating mechanism, and first elevating mechanism being capable of band
Dynamic warm table heats first cuvette or/and the second cuvette, second elevating mechanism are able to drive the cooling platform
Cooling first cuvette or/and the second cuvette.
7. water quality on-line monitoring device according to claim 4, which is characterized in that the LED light source includes ultraviolet light
LED light source and visible LED light source；The photoelectric sensor includes two pole of silicon based opto-electronics diode and gallium nitride base photoelectricity
Pipe；Wherein, ultraviolet leds light source and gallium nitride base photodiode are corresponding, and the light intensity for sensing UV wavelength range is believed
Number, it is seen that light LED light source is corresponding with silicon based opto-electronics diode, for sensing the light intensity signal of visible-range；
Two parallel sides of first cuvette are respectively equipped with a ultraviolet leds light source and a gallium nitride base photoelectricity
Two parallel sides of diode, second cuvette are respectively equipped with a visible LED light source and a silicon based opto-electronics
Diode；One side of the third cuvette is set there are two LED light source, respectively ultraviolet leds light source and visible LED
Light source, another side are set there are two photoelectric sensor, respectively gallium nitride base photodiode and silicon based opto-electronics diode.
8. according to the described in any item water quality on-line monitoring devices of claim 4-7, which is characterized in that further include black capsul
Body, the water sample pretreatment system, water sample detection system, control system and multiple cuvettes are set to the black sealing
In shell, and setting is protected from light layer between multiple cuvettes, and the layer that is protected from light can be by corresponding photoelectric sensor and LED light
Source separates.
9. according to the described in any item water quality on-line monitoring devices of claim 4-7, which is characterized in that further include ultrapure water cleaning
System and Mead-Bauer recovery system, the ultrapure water cleaning system include ultrapure pond and the 6th solenoid valve, and the ultrapure pond is logical
The 6th solenoid valve is crossed to connect with the suction pump；The Mead-Bauer recovery system includes waste liquid pool, first cuvette,
The lower end of two cuvettes, third cuvette and the 4th cuvette passes through the 7th solenoid valve, the 8th solenoid valve, the 9th solenoid valve respectively
It is connect with the tenth solenoid valve with the waste liquid pool, the 7th solenoid valve, the 8th solenoid valve, the 9th solenoid valve and the tenth solenoid valve
It is controlled respectively by the microprocessor.
10. according to the described in any item water quality on-line monitoring devices of claim 4-7, which is characterized in that more electrochemistry
Sensor integration probe includes temperature sensor, the 2nd pH sensor, conductivity sensor and TDS sensor；Described is more
Electrochemical sensor integration probe is located in the 4th cuvette.
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| CN201820711016.7U CN208350625U (en) | 2018-05-11 | 2018-05-11 | A kind of water quality on-line monitoring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110244014A (en) * | 2019-07-15 | 2019-09-17 | 石家庄铁路职业技术学院 | Water quality testing meter based on open source hardware |
| CN110308684A (en) * | 2019-07-02 | 2019-10-08 | 昆明理工大学 | A kind of automatic detection of the information that water body P elements are exceeded fusion and real-time processing device |
| CN111309077A (en) * | 2020-02-21 | 2020-06-19 | 青岛聚鑫创赢信息技术有限公司 | Aquaculture detection management system |
| RU2741308C1 (en) * | 2020-05-19 | 2021-01-25 | Общество с ограниченной ответственностью "Научно-производственное объединение "АМБ" | Device for integrated water quality monitoring in stationary and field conditions |
| CN112504986A (en) * | 2021-02-05 | 2021-03-16 | 成都益清源科技有限公司 | Optical probe for effectively improving full-spectrum signal quality |
| CN115356327A (en) * | 2022-10-19 | 2022-11-18 | 北京市农林科学院智能装备技术研究中心 | Nutrient solution detection device, method and system |
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2018
- 2018-05-11 CN CN201820711016.7U patent/CN208350625U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308684A (en) * | 2019-07-02 | 2019-10-08 | 昆明理工大学 | A kind of automatic detection of the information that water body P elements are exceeded fusion and real-time processing device |
| CN110244014A (en) * | 2019-07-15 | 2019-09-17 | 石家庄铁路职业技术学院 | Water quality testing meter based on open source hardware |
| CN111309077A (en) * | 2020-02-21 | 2020-06-19 | 青岛聚鑫创赢信息技术有限公司 | Aquaculture detection management system |
| RU2741308C1 (en) * | 2020-05-19 | 2021-01-25 | Общество с ограниченной ответственностью "Научно-производственное объединение "АМБ" | Device for integrated water quality monitoring in stationary and field conditions |
| CN112504986A (en) * | 2021-02-05 | 2021-03-16 | 成都益清源科技有限公司 | Optical probe for effectively improving full-spectrum signal quality |
| CN115356327A (en) * | 2022-10-19 | 2022-11-18 | 北京市农林科学院智能装备技术研究中心 | Nutrient solution detection device, method and system |
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