CN106290532B - A kind of intelligent water quality trace heavy metal on-line monitoring and early warning system of internet of things oriented - Google Patents
A kind of intelligent water quality trace heavy metal on-line monitoring and early warning system of internet of things oriented Download PDFInfo
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- CN106290532B CN106290532B CN201610860841.9A CN201610860841A CN106290532B CN 106290532 B CN106290532 B CN 106290532B CN 201610860841 A CN201610860841 A CN 201610860841A CN 106290532 B CN106290532 B CN 106290532B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/42—Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/48—Systems using polarography, i.e. measuring changes in current under a slowly-varying voltage
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Abstract
A kind of intelligent water quality trace heavy metal on-line monitoring and early warning system of internet of things oriented, including power module, flow path module, example reaction sensing chamber, peripheral circuit, industrial control computer.The power module connects peripheral circuit, powers for whole system.The peripheral circuit includes control circuit module, constant pressure scanning power supply, Weak current measurement module, data acquisition module, and control circuit module is separately connected flow path module, constant pressure scanning power supply.The flow path module connects example reaction sensing chamber, and example reaction detection interior is equipped with reference electrode, to electrode and working electrode；The reference electrode connects constant pressure scanning power supply, the working electrode connects Weak current measurement module, the Weak current measurement module connects data acquisition module, and the data acquisition module connects industrial control computer by serial ports, and the industrial control computer connects control circuit module.The intelligent water quality trace heavy metal on-line monitoring and early warning system of a kind of internet of things oriented of the present invention have the advantages of more detection parameters, detection limit for height, detection is quick, power consumption is lower, cost is relatively low.
Description
Technical field
The intelligent water quality trace heavy metal on-line monitoring and early warning system of a kind of internet of things oriented of the present invention, are related to earth's surface
Water quality safety monitoring and the early warning technology field of a kind of source water, urban pipe network water and secondary water-supply.
Background technique
Heavy metal refers to that specific gravity is greater than 5g/cm3Metallic element, about 45 kinds.Water quality heavy metal pollution refers to by weight
The pollution of ambient water quality caused by metal or its compound, mainly caused by mining, exhaust gas discharge, sewage fill the human factors such as general.
A kind of heavy metal pollution of this five kinds of heavy metal, especially mercury, lead, cadmium, chromium and arsenic, will directly affect water ecological environment safety and drink
With the safety of water source, it is dead to make aquatile, or is enriched in aquatile body, it is strong to seriously endanger human body eventually by food chain
Health, thus heavy metal is the water quality parameter for needing strictly to monitor.In recent years, water quality heavy metal pollution event takes place frequently, by China
The great attention of government, during " 12th Five-Year Plan " Chinese Ministry of Environmental Protection just have begun Heavy Metal Pollution system, accident emergency system and
The foundation of environment and health risk assessment system and perfect, and water quality monitoring heavy metal pollution and early warning be the system it is important before
It mentions and basic, is badly in need of advanced water quality monitoring instrument science and technology and supports, provide important section for timely assessment and the prevention and treatment of water pollution
Learn technical support.
However, there are many water quality heavy metal type, that is, it include cadmium (Cd), lead (Pb), mercury (Hg), chromium (Cr) and metalloid arsenic
(As) etc. the significant heavy metal of bio-toxicities, also includes the general heavy metal such as zinc (Zn) with certain toxicity, copper (Cu), cobalt
(Co), nickel (Ni), tin (Sn) etc..Meanwhile trace contamination can also cause very big harm to human body, " People's Republic of China (PRC) is raw
Sanitary standard for drinking water living " GB5749-2006 also dictates drinking water, the biggish cadmium of harm to the human body, lead, chromium, arsenic, mercury
It is required that must not exceed 1-50 μ g/L.Simultaneously as water quality monitoring network node has a large capacity and a wide range, therefore, detection parameters are only had both
The advanced monitoring instrument for the advantages such as more, detection limit for height, detection are quickly, power consumption is lower, cost is relatively low is just able to satisfy internet of things oriented
The monitoring of trace water quality heavy metal and the technical need of early warning.
Currently, multi-parameter water quality heavy metal monitoring instrument mainly has Molecular Spectral Analysis monitoring technology and atomic spectroscopic analysis
Two class of monitoring technology.Wherein there are mainly two types of technologies for the multi-parameter heavy metal online monitoring instruments based on Molecular Spectral Analysis technology
Type: more single spectrum analysis module (or more colorimetric analysis modules) integrated-types and continuous spectrum sequence detection type.First kind instrument
Device generally integrates 3-4 analysis module, and otherwise instrument cost is excessively high, one colorimetric analysis module of general every increase, instrument price
Ten thousand yuan of 7-10 will be increased, and make user be difficult to receive, therefore only can detecte 3-4 heavy metal parameters.Meaning such as Italy is big
The online copper of sharp SYSTEA-, chromium, three parameter heavy metal analyser of nickel and the multi-parameter of a Shenzhen Lang Shi bio-instruments Co., Ltd huge sum of money
Belong to online water analysis instrument.Second quasi-instrument is generally using micro spectrometer as core, the water quality monitoring based on continuous spectrum analysis
Instrument can be detected different water quality heavy metal parameters, instrument although only needing to change detection reagent and characteristic spectrum Detection wavelength
Device generally only has a sample detection room, and using multi-parameter sequence detection technology, therefore measurement period is longer.Due to both classes
The online monitoring instruments of type, which are both needed to integrate online sample chemical pretreatment technology, to be oxidized to water soluble ion metal and is converted into
Corresponding substance that show color, not only measurement period is long, but also online chemical pretreatment reaction principle needed for the different heavy metals of detection,
Condition and reaction reagent are all different, and therefore, are technically difficult to apply to water quality heavy metal pollution multi-parameter monitoring and early warning,
The fast slowdown monitoring of emergency of especially sudden water quality heavy metal pollution.
In recent years, such wherein the multi-parameter heavy metal monitoring instrument product based on atomic spectroscopic analysis technology starts to list
Instrument is typically integrated in line high temperature high energy Sample Pretreatment Technique, and sample is made to be converted into plasma, continuous based on high-resolution
Spectral analysis technique can accurately detect all kinds of heavy metal components and concentration in detection plasma sample, this kind of online monitoring instruments
It is expensive, power consumption is very big although meeting the technical need of sudden monitoring heavy metal pollution and early warning, such as Germany
PQ9000 high-resolution ICP-OES heavy metal monitoring instrument, thus, the development for being also unsatisfactory for water quality monitoring technology of Internet of things is wanted
It asks.
Summary of the invention
It is an object of the invention to: for existing conventional water quality heavy metal multi-parameter monitoring instrument, it is impossible to meet heavy metals
Pollution monitoring and early warning, the state of the art of the emergency fast slowdown monitoring and early warning of especially sudden water quality heavy metal pollution, for
The water quality safety of earth's surface one kind source water, urban pipe network water and secondary water-supply monitors, and provides a kind of intelligence of internet of things oriented
Water quality trace heavy metal on-line monitoring and early warning system, have detection parameters are more, detection limit for height, detection is quick, power consumption is lower, at
This lower advantage.
The technical scheme adopted by the invention is that:
A kind of intelligent water quality trace heavy metal on-line monitoring and early warning system of internet of things oriented, including power module,
Flow path module, example reaction sensing chamber, peripheral circuit, industrial control computer.The power module connects peripheral circuit, is whole
A system power supply.The peripheral circuit includes control circuit module, constant pressure scanning power supply, Weak current measurement module, data acquisition
Module, control circuit module are separately connected flow path module, constant pressure scanning power supply.The flow path module connection example reaction detection
Room, example reaction detection interior are equipped with reference electrode, to electrode and working electrode；The reference electrode connection constant pressure is swept
Power supply is retouched, the working electrode connects Weak current measurement module, and the Weak current measurement module connects data acquisition module, described
Data acquisition module connects industrial control computer by serial ports, and the industrial control computer connects control circuit module.
The example reaction sensing chamber is connected with ultrasonic wave added reaction unit and heating constant-temperature equipment, to accelerate sample inspection
Degree of testing the speed.
The example reaction sensing chamber includes circulation detecting pool, stainless steel sink, and the example reaction detects indoor location
There is reference electrode, to electrode and working electrode, electrode induction end protrudes into example reaction system, and example reaction system is in flow path system
Under the action of circulated detection cell by the first entrance of the circulation detecting pool, second entrance, third entrance.
The stainless steel sink be equipped with distillation water inlet, distilled water under the action of flow path system by distillation water inlet into
Enter stainless steel sink, the heating water bath and constant temperature for example reaction system；
It is equipped with the first thermoelectric control module and the second thermoelectric control module on the outside of the stainless steel sink, it is anti-for sample
Answer the heating and temperature control of sensing chamber；
The stainless steel water trench bottom gluing has a ultrasonic transducer, and the ultrasonic transducer connects supersonic generator, and two
Person's cooperating generates ultrasonic wave, for the stirring of example reaction system and the cleaning of flow cell；
The stainless steel sink bottom left is equipped with the first waste discharge mouth, and the first waste discharge mouth connects the first minisize dc waste discharge
Pump, institute's removal waste fluid enter waste liquid pool；
The circulation detecting pool bottom right side is equipped with the second waste discharge mouth, and the second waste discharge mouth connects the second minisize dc waste discharge
Pump, institute's removal waste fluid enter Recycling of waste liquid pond.
The flow path module includes the first micro DC pump, the first micro-step motor peristaltic pump, the second miniature step
Into motor creeping pump, the second miniature DC motor peristaltic pump；
The distillation water inlet of first micro DC pump connection example reaction sensing chamber, for used in constant temperature water bath
The injection of distilled water；
The first entrance of the circulation detecting pool of first micro-step motor peristaltic pump connection example reaction sensing chamber, is used
In the injection of sample, and it can accurately control the volume of injected sample；
The second entrance of the circulation detecting pool of second micro-step motor peristaltic pump connection example reaction sensing chamber, is used
In the injection of reaction electrolyte, and it can accurately control the volume of injected electrolyte；
The third entrance of the circulation detecting pool of second miniature DC motor peristaltic pump connection example reaction sensing chamber, is used
In the injection of distilled water, for cleaning circulation detecting pool.
The intelligent water quality trace heavy metal on-line monitoring and early warning system, advantage of a kind of internet of things oriented of the present invention exist
In:
1), according to stripping voltammetry principle, since characteristic peaks electric current of the different heavy metal ion on I-V curve is equal
A corresponding characteristic voltage value, therefore the principle of analogy substance spectra fingerprint recognition, system can establish water quality heavy metal fingerprint
Database, to realize to cadmium (Cd), lead (Pb), mercury (Hg), chromium (Cr), zinc (Zn), copper (Cu), cobalt (Co), nickel (Ni), tin (Sn)
The monitoring and early warning of equal heavy metal pollutions.
2), according to stripping voltammetry principle, using tested water body as a sample Long-term analysis, same analogy analogy substance
The principle light of spectral fingerprint identification, can establish current-voltage-time three-dimensional water quality Characteristics of Heavy Metals spectrogram, such as at some
Between, current value at some voltage mutate, in spite of can determine that it is specific establishing water quality heavy metal fingerprint database
Ingredient, it is considered that heavy metal pollution occurs for tested water body, then the evidence obtaining that keeps sample immediately send relevant authority to be further analysed, because
And system has the emergency monitoring and warning function for coping with sudden water quality heavy metal pollution.
3), certain electrolyte solution, nothing need to be only added in present invention detection heavy metal pollution of water body inside reaction system
A large amount of and various samples chemical pretreatment is needed, therefore secondary pollution is small, use cost is low.
Detailed description of the invention
Fig. 1 is general structure schematic diagram of the invention.
Fig. 2 is example reaction sensing chamber structural schematic diagram of the invention.
Fig. 3 is flow path module principle figure of the invention.
Fig. 4 is constant pressure scanning source circuit figure of the invention.
Fig. 5 is weak current signal acquisition process module circuit diagram of the invention.
The Stripping Voltammetry figure of Fig. 6 (1) lead at different concentrations ion samples solution.
Fig. 6 (2) is calibration and detection principle diagram of system (by taking lead ion detects as an example).
Fig. 7 (1) is tested heavy metal pollution detection principle diagram.
Fig. 7 (2) is current-voltage-time three-dimensional water quality Characteristics of Heavy Metals volt-ampere Stripping Currents spectrogram.
Fig. 8 is the concrete application schematic diagram of the invention towards water quality monitoring Internet of Things.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
As shown in Figure 1, the intelligent water quality trace heavy metal on-line monitoring and early warning system of a kind of internet of things oriented, system
Structure includes power module, flow path module, example reaction sensing chamber, peripheral circuit and industrial control computer.
The power module connects peripheral circuit, powers for whole system.
The flow path module include two Miniature precision stepper motor peristaltic pumps and miniature DC motor peristaltic pump, first point
Miniature precision stepper motor peristaltic pump connects detected water sample, and second point of Miniature precision stepper motor peristaltic pump connects electrolyte, micro-
Type direct current generator peristaltic pump connects distilled water.
The peripheral circuit is by control circuit module, constant pressure scanning power supply, Weak current measurement module and data acquisition module
Composition；
The three-electrode system that the example reaction sensing chamber designs for foundation volt-ampere stripping analysis principle, three electrode
By reference electrode, electrode and working electrode are formed and built-in are installed on example reaction sensing chamber, the example reaction sensing chamber
Reference electrode connects the constant pressure scanning power supply of peripheral circuit, and example reaction sensing chamber working electrode connects the weak of peripheral circuit
Current measurement module；The sample detection room is connected with ultrasonic wave added reaction unit and heating constant-temperature equipment, to accelerate sample
Detect speed.
The industrial control computer is based on windows workbench, built-in system control and data processing software, described
When software systems are run, industrial control computer handles data acquisition module output signal according to serial port protocol, analyzes tested water
The ingredient of heavy metal and its concentration is calculated in sample, and control command can also be sent by serial port protocol, pass through control circuit mould
The specific running of block control flow path module and constant pressure scanning power supply.The sample detection room be connected with ultrasonic wave added reaction unit and
Heating constant-temperature equipment, to accelerate sample detection speed, specific running can also send control life by industrial control computer
Order is achieved.Radio receiving transmitting module built in the Industrial Control Computer.
As shown in Fig. 2, a kind of example reaction sensing chamber designed based on volt-ampere leaching, main body is circulation detecting pool
1 and stainless steel sink 2 be assembled through mechanical structure, the circulation detecting pool is that material is k9 glass, convenient for cleaning, the sample
Indoor location is surveyed in product examine has working electrode 3, to electrode 4 and reference electrode 5, and all electrode signal output ends connect dispatch from foreign news agency
Road, all electrode induction end protrude into example reaction system 6, and the example reaction system 6 is led under the action of flow path system
The first entrance 8, second entrance 9, third entrance 10 of the circulation detecting pool are crossed, it is described stainless into the circulation detecting pool 1
The design of steel water tank upper left side has distillation water inlet 11, and distilled water 12 is entered under the action of flow path system by distillation water inlet 11
Stainless steel sink is equipped with the first thermoelectricity on the outside of the stainless steel sink for the heating water bath and constant temperature of example reaction system 6
Temperature control module 13 and the second thermoelectric control module 14, for the heating and temperature control of example reaction sensing chamber, the stainless steel sink
Bottom gluing has ultrasonic transducer 15, and the ultrasonic transducer 15 connects supersonic generator 16, and the two cooperating generates super
Sound wave 17, for the stirring of reaction system and the cleaning of flow cell, the stainless steel sink bottom left design has the first waste discharge
Mouth 18, the first waste discharge mouth 18 connect the first minisize dc waste discharge pump 19, and institute's removal waste fluid enters waste liquid pool 22, the circulation detecting pool
Right bottom design has the second waste discharge mouth 20, and the second waste discharge mouth 20 connects the second minisize dc waste discharge pump 21, and institute's removal waste fluid enters back
Receive waste liquid pool 22.
As shown in figure 3, intermediate link of the example reaction sensing chamber as flow path module, flow path module further includes first miniature
Direct current pump 1.1, the first micro-step motor peristaltic pump 1.2, the second micro-step motor peristaltic pump 1.3, second are miniature straight
Galvanic electricity machine peristaltic pump 1.4, the first minisize dc waste discharge pump the 19, second minisize dc waste discharge pump 21 and relevant connection pipeline, described
First micro DC pump 1 connects the trough distilling water inlet 11 of example reaction sensing chamber, for constant temperature water bath distillation used
The injection of water, the first micro-step motor peristaltic pump 1.2 connect the first entrance 8 of product reaction detection room circulation detecting pool,
For the injection of sample, and the volume of injected sample can be accurately controlled, second micro-step motor is compacted
The second entrance 9 of dynamic 1.3 connection product reaction detection room circulation detecting pool of pump, for the injection of reaction electrolyte, and can essence
The really volume of the injected electrolyte of control, the second miniature DC motor peristaltic pump 1.4 connect the circulation inspection of product reaction detection room
The third entrance 10 for surveying pond, for the injection of distilled water, for cleaning circulation detecting pool.
As shown in Figure 2 and Figure 3, the first minisize dc waste discharge pump 19 in flow path module is for being discharged sink endometamorphism
Distilled water, and match work with the first micro DC pump 1.1, for the cleaning of sink, in flow path module described second
Minisize dc waste discharge pump 21 be used for circulation detecting pool waste discharges, and with the second miniature DC motor peristaltic pump 1.4, ultrasonic transducer
15, ultrasonic generator 16 matches work, the cleaning for circulation detecting pool.
Core if Fig. 4, Fig. 5 are respectively instrument telemetry circuit is constant pressure scanning power supply and weak current acquisition module.
As shown in figure 4, the constant pressure scanning power supply technical principle are as follows: PCA9557, which is one, has reset and configuration deposit
Long-range 8 I2C and SMBus low-power I/O expander of device has 3 inputs by I2C agreement and PC Communication
Mouth and 8 delivery outlets.TPS7A7200 is the low-voltage drop linear pressure stabilizing of a single channel output, extremely low input, programmable voltage output
Device exports electric current up to 2A.The programmable voltage output being made of PCA9557 and TPS7A7200, by SCLK and SDATA with
Host computer communication, can make between the circuit module VOUT1 and VOUT2 output voltage range 0.5V and 3.65V, wherein walking
Into for 50mV.The difference voltage between VOUT1 and VOUT2 can be made to change between -3.6V and 3.6V by programming, step change
For 50mV.It is programmed by I2C, realizes the purpose of constant pressure source scanning.
As shown in figure 5, the weak current acquisition module technical principle are as follows: IN282 is a high-precision, wide common mode range, double
To current parallel monitor, by accessing a sampling resistor between+IN and-IN, (resistance value very little is about 10 millis to this chip
Europe) pressure drop will be generated on sampling resistor when have has electric current to flow through on resistance, by+IN and-IN mouthfuls of entrance, then by chip
The differential amplification in portion inhibits common-mode signal to amplify difference mode signal, is exported by OUT, passes through REF1, REF2 pin control output mould
Formula.When REF1, REF2 pin are grounded simultaneously, output will start the increase with electric current in 0V and be similar to linear increase, thus
The electric current of collecting work electrode.
As shown in Fig. 6 (1), Fig. 6 (2), by taking the on-line monitoring of water quality heavy metal lead ion as an example, illustrate instrument of the present invention
Calibration and testing principle.
As Fig. 6 (1), with distilled water prepare respective concentration gradient (0.249ppm, 0.498ppm, 0.744ppm,
1.235ppm, 1.478ppm, 1.720) Dithizone extract each standard solution by flow path and enter example reaction inspection
Room is surveyed, measures corresponding volt-ampere dissolution peak point current (unit uA) of each standard solution at peak voltage (- 0.48V) respectively rising.
Such as Fig. 6 (2), using the concentration C of each standard solution as abscissa, using corresponding peak point current as ordinate, using most
Small two, which multiply principle, fits standard working curve, and Y=25.11556+50.45443X, wherein Y represents peak current value Ip, X generation
Standard working curve transplanting is cured to data processing software, is tested to unknown plumbum ion concentration by table sample concentration C
Sample measures peak current value I corresponding to its crest voltagep, detected sample can be calculated by substituting into the standard working curve
The concentration C of lead ion in product solution
The calibration and detection of other heavy metal ion and the detection method of lead ion are identical as principle.
As shown in Fig. 7 (1), Fig. 7 (2), with various metals ion (zinc ion Zn2+, cadmium ion Cd2+, lead ion Pb2+, copper
Ion Cu2+) volt-ampere dissolution figure come illustrate system monitoring and early warning principle.
Such as Fig. 7 (1), zinc ion Zn in detected water sample2+, cadmium ion Cd2+, lead ion Pb2+, copper ion Cu2+Respective volt-ampere
Dissolving out the corresponding scanning voltage value of peak point current is respectively -1.25V, cadmium (Cd) -0.75V, lead (Pb) -0.48V, copper (Cu) -
0.34V, as long as can determine whether to occur in tested water body above-mentioned that is, there is peak current in above-mentioned scanning voltage value position
Heavy metal pollution.
Such as Fig. 7 (2), some region of tested water body sample as a whole, the sample is established in the form of database
This current-voltage-time three-dimensional water quality Characteristics of Heavy Metals volt-ampere Stripping Currents figure, can monitor in water body on the whole from sample
Zinc ion Zn2+, cadmium ion Cd2+, lead ion Pb2+, copper ion Cu2+The variation of concentration is analyzed from time shaft, when from 150 seconds, is opened
There is heavy metal pollution in beginning, and from 150 seconds to 350 second, the concentration that heavy metal ion is tested in water body is gradually increased, therefore, can be with
According to the feature of tested water body, an alarm limit is set, if the tested concentration of heavy metal ion in water body is more than the alarm limit, then
Warning information is issued to relevant departments, in addition, the variation of the tested concentration of heavy metal ion in water body can be by concentration vs. time
Derivative (i.e. differential) value carrys out quantitative description, and a derivative value alarm limit equally can be set, if the tested heavy metal in water body
Ion concentration steeply rises and derivative value is made to be more than alarm limit, then still issues warning information to relevant departments.
Such as Fig. 7 (2), still some region of tested water body sample as a whole, if in some time, some electricity
Current value at pressure mutates (such as more than a certain restriction threshold value or increase rapidly abnormal sudden change), in spite of can built
Its specific ingredient is determined in vertical water quality heavy metal fingerprint database, it is considered that heavy metal pollution occurs for tested water body, then
System makes heavy metal pollution alarm immediately, and the evidence obtaining that keeps sample immediately send relevant authority department to be further analysed.
Such as Fig. 8, the wireless of this system is utilized for the multiple spot monitoring of a certain specific water body towards water quality monitoring Internet of Things
Transmission-receiving function, using this system as monitoring network node, water quality heavy metal multi-parameter is can be achieved in each node, networking is supervised online
Survey, the heavy metal parameter that each node is monitored can with can be different, for tested water body each monitoring network node it is specific
Depending on demand.
Claims (5)
1. a kind of intelligent water quality trace heavy metal of internet of things oriented is monitored on-line and early warning system, including power module, stream
Road module, example reaction sensing chamber, peripheral circuit, industrial control computer, it is characterised in that:
The power module connects peripheral circuit, powers for whole system；
The peripheral circuit includes control circuit module, constant pressure scanning power supply, Weak current measurement module, data acquisition module, control
Circuit module processed is separately connected flow path module, constant pressure scanning power supply；
The flow path module connects example reaction sensing chamber, and example reaction detection interior is equipped with reference electrode (5), to electricity
Pole (4) and working electrode (3)；The reference electrode (5) connects constant pressure scanning power supply, and the working electrode (3) connects weak current
Measurement module, the Weak current measurement module connect data acquisition module, and the data acquisition module connection Industry Control calculates
Machine, the industrial control computer connect control circuit module；
Radio receiving transmitting module built in the Industrial Control Computer；
Water quality trace heavy metal on-line monitoring and method for early warning: detected water sample passes through under the action of peripheral control circuit module
Flow path enters example reaction sensing chamber, and detecting electrode built in example reaction sensing chamber is tested according to volt-ampere leaching testing principle
Heavy metal ion is first enriched with is electrolysed afterwards on the electrode, the small signal of weak current exported by working electrode, recording responses electric current
Function I-V curve with scanning voltage is applied, can determine tested heavy metal by the corresponding voltage value of current peak on I-V curve
Ingredient, and can determine the concentration of the tested heavy metal by the size of peak point current, realized accordingly to water quality heavy metal pollution
Monitoring and early warning.
2. a kind of intelligent water quality trace heavy metal on-line monitoring of internet of things oriented and early warning system according to claim 1
System, it is characterised in that: the example reaction sensing chamber is connected with ultrasonic wave added reaction unit and heating constant-temperature equipment, to accelerate
Sample detection speed.
3. a kind of intelligent water quality trace heavy metal on-line monitoring of internet of things oriented and early warning system according to claim 1
System, it is characterised in that: the example reaction sensing chamber includes circulation detecting pool (1), stainless steel sink (2), the example reaction
Detection interior is equipped with reference electrode (5), to electrode (4) and working electrode (3), and electrode induction end protrudes into example reaction system
(6), example reaction system (6) passes through the first entrance (8) of the circulation detecting pool (1), second under the action of flow path system
Entrance (9), third entrance (10) circulate detection cell (1).
4. a kind of intelligent water quality trace heavy metal on-line monitoring of internet of things oriented and early warning system according to claim 3
System, it is characterised in that: the stainless steel sink (2) is equipped with distillation water inlet (11), effect of the distilled water (12) in flow path system
It is lower that stainless steel sink (2) are entered by distillation water inlet (11), it is used for the heating water bath and constant temperature of example reaction system (6)；
It is equipped with the first thermoelectric control module (13) and the second thermoelectric control module (14) on the outside of the stainless steel sink (2), is used
In the heating and temperature control of example reaction sensing chamber；
Stainless steel sink (2) bottom gluing has ultrasonic transducer (15), ultrasonic transducer (15) the connection ultrasonic wave hair
Raw device (16), the two cooperating generate ultrasonic wave (17), for the stirring of example reaction system (6) and the cleaning of flow cell；
Stainless steel sink (2) bottom left is equipped with the first waste discharge mouth (18), and the first waste discharge mouth (18) connection first is miniature straight
Waste discharge pump (19) is flowed, institute's removal waste fluid enters waste liquid pool (22)；
Circulation detecting pool (1) bottom right side is equipped with the second waste discharge mouth (20), and the second waste discharge mouth (20) connection second is miniature straight
Waste discharge pump (21) is flowed, institute's removal waste fluid enters Recycling of waste liquid pond (22).
5. a kind of intelligent water quality trace heavy metal on-line monitoring of internet of things oriented and early warning system according to claim 1
System, it is characterised in that: the flow path module includes the first micro DC pump (1.1), the first micro-step motor peristaltic pump
(1.2), the second micro-step motor peristaltic pump (1.3), the second miniature DC motor peristaltic pump (1.4)；
The distillation water inlet (11) of first micro DC pump (1.1) connection example reaction sensing chamber, it is permanent for water-bath
The injection of distilled water used in temperature；
The first of the circulation detecting pool (1) of first micro-step motor peristaltic pump (1.2) connection example reaction sensing chamber enters
Mouth (8), for the injection of sample, and can accurately control the volume of injected sample；
The second of the circulation detecting pool (1) of second micro-step motor peristaltic pump (1.3) connection example reaction sensing chamber enters
Mouth (9), for the injection of reaction electrolyte, and can accurately control the volume of injected electrolyte；
The third of the circulation detecting pool (1) of second miniature DC motor peristaltic pump (1.4) connection example reaction sensing chamber enters
Mouth (10), for the injection of distilled water, for cleaning circulation detecting pool (1).
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| CN109444231A (en) * | 2018-12-25 | 2019-03-08 | 上海纳米技术及应用国家工程研究中心有限公司 | A kind of heavy metal ion on-line detecting system based on electrochemical analysis techniques |
| CN111505096A (en) * | 2020-04-27 | 2020-08-07 | 华虹半导体(无锡)有限公司 | Metal ion monitoring system |
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| CN111896487A (en) * | 2020-06-19 | 2020-11-06 | 江苏经纬环境集团有限公司 | Method for detecting content of metal elements in wastewater |
| CN112834587A (en) * | 2021-01-05 | 2021-05-25 | 长沙卡琳顿科技有限公司 | Portable electrochemical heavy metal detector |
| CN113670998B (en) * | 2021-07-29 | 2024-03-15 | 力合科技（湖南）股份有限公司 | Automatic measuring instrument and automatic measuring method for thallium concentration in wastewater |
| CN114636800B (en) * | 2022-04-22 | 2023-05-09 | 中山大学 | Water quality monitoring device and monitoring method thereof |
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