CN108627553A - Platinum electrode Multifunction Sensor - Google Patents
Platinum electrode Multifunction Sensor Download PDFInfo
- Publication number
- CN108627553A CN108627553A CN201810463442.8A CN201810463442A CN108627553A CN 108627553 A CN108627553 A CN 108627553A CN 201810463442 A CN201810463442 A CN 201810463442A CN 108627553 A CN108627553 A CN 108627553A
- Authority
- CN
- China
- Prior art keywords
- sensor
- electrode
- microprocessor
- ion
- conductivity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- 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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1813—Water specific cations in water, e.g. heavy metals
Abstract
The invention discloses platinum electrode Multifunction Sensors, data processing module is by microprocessor, memory forms, communication module is wireless communication module Zigbee, data acquisition module detects the temperature in water body by sensor, conductivity, pH value, oxidation-reduction potential, the heavy metal ion such as lead ion, detection signal enters microprocessor through A/D converter, microprocessor is filtered data, it merges and stores, communication module realizes the communication between remote control center using wireless communication technique, the data handled well are transmitted to remote control center by microprocessor by aggregation node, if detecting water quality index not in prescribed limit, warning circuit is alarmed, remote control center inquires abnormal index and makes corresponding processing.The beneficial effects of the invention are as follows sensor accuracy of detection height, and water quality detecting function may be implemented.
Description
Technical field
The invention belongs to water quality monitoring technical fields, are related to application of the platinum electrode Multifunction Sensor in aquaculture.
Background technology
As science and technology and management development, aquaculture are gradually transitions by traditional extensive cultivation (lake and reservoir is breeded fish)
The modes such as intensive culture and high density culture are to obtain high yield.Water quality is most important to aquaculture, temperature, conductivity, pH value, oxidation
The leakage part of the heavy metal ion such as the variation of reduction potential and lead ion can cause the underproduction to bring economic loss.Traditional water quality inspection
Survey sensor there are it is of high cost, be unable to the single disadvantages such as low with sensitivity of in-site measurement, testing result, be unable to ensure aquaculture
In water quality detection.
Invention content
The purpose of the present invention is to provide platinum electrode Multifunction Sensors, and the beneficial effects of the invention are as follows sensor detections
Precision is high, and water quality detecting function may be implemented.
The technical solution adopted in the present invention be include data acquisition module, data processing module, communication module and power supply
Module, data acquisition module are turned by temperature sensor, conductivity sensor, pH value ORP sensors, lead ion sensor and A/D
Parallel operation forms, and data processing module is made of microprocessor, memory, and communication module is wireless communication module Zigbee, data
Acquisition module by sensor detect the heavy metals such as temperature, conductivity, pH value, oxidation-reduction potential, lead ion in water body from
Son, detection signal enter microprocessor through A/D converter, and microprocessor is filtered data, merges and stores, communication module
Realize that the communication between remote control center, microprocessor save the data handled well by convergence using wireless communication technique
Point is transmitted to remote control center, if detecting water quality index not in prescribed limit, warning circuit alarm, and remote control center
Inquiry abnormal index simultaneously makes corresponding processing.
Further, temperature sensor, conductivity sensor, pH value ORP sensors, lead ion sensor are made of platinum
Three electrode target formula sensors, in three electrode target formula sensors, one of central electrode is round to be located at center, another two electrode
It is that arc-shaped electrode surround central electrode respectively.
Further, temperature sensor, conductivity sensor, pH value ORP sensors, lead ion sensor sense for bipolar electrode
Device or four electrode sensors, wherein dual-electrode sensor are two 5 microns of electrode gaps, and 5V power supplys and one are connected between bipolar electrode
The resistance of a 100k Ω immerses sensor in the test solution containing lead ion and other heavy metal ion；Four electrode sensings
Small―gap suture between two, device left side electrode, two, the right electrode is 5 microns, and the wide arc gap between intermediate two electrodes is 50 micro-
Meter, it is connected to the resistance of 5V power supplys and a 100k Ω between two electrodes in left and right, sensor is immersed containing lead ion and other
In the test solution of heavy metal ion.
The present invention devises a platinum electrode Multifunction Sensor, can be to the temperature in water, conductivity, pH value, oxidation
Reduction potential, lead ion and other heavy metal ion are measured, and ensure the water quality safety of aquaculture.The multi-functional biography of platinum electrode
Sensor belongs to chemical water quality detection sensor (electric pole type), and mainly electricity occurs by the lewis' acid in electrode surface and water in it
Chemical reaction, generates the voltage or electric current of variation in circuit, is changed by the current or voltage in detection circuit to measure water
In impact factor.Platinum electrode Multifunction Sensor is made of single layer PVDTi/Pt, at low cost, structure and is simple to manufacture.
Description of the drawings
Fig. 1 is platinum electrode Multifunction Sensor monitoring system schematic of the present invention；
Fig. 2 is three electrode target formula sensor schematics；
Fig. 3 is dual-electrode sensor schematic diagram；
Fig. 4 is four electrode sensor schematic diagrames.
Specific implementation mode
The present invention is described in detail With reference to embodiment.
The present invention as shown in Figure 1, include data acquisition module 1, data processing module 2, communication module 3 and power module 4,
Its structure is as shown in Figure 1.Data acquisition module 1 is by temperature sensor 101, conductivity sensor 102, pH value ORP sensors
103, lead ion sensor 104 and A/D converter 105 form, and data processing module 2 is by 202 groups of microprocessor 201, memory
Be wireless communication module Zigbee301 at, communication module 3, data acquisition module 1 detected by sensor temperature in water body,
The heavy metal ion such as conductivity, pH value, oxidation-reduction potential, lead ion, detection signal enter microprocessor through A/D converter 105
Device 201, microprocessor 201 are filtered data, merge and store.Communication module is using wireless communication technique realization and remotely
The data handled well are transmitted to remote control center by the communication between control centre, microprocessor 201 by aggregation node, if
Water quality index is detected not in prescribed limit, warning circuit alarm, remote control center inquiry abnormal index is simultaneously made corresponding
Processing.
Wherein, as shown in Fig. 2, temperature sensor 101, conductivity sensor 102, pH value ORP sensors 103, lead ion
Sensor 104 is the three electrode target formula sensor 5 made of platinum, in three electrode target formula sensors 5, one of central electrode
501 are located at center to be round, and another two electrode is arc-shaped electrode 502 respectively around central electrode.Three electrode target formula sensors 5 can
For conductivity, the detection of pH/ORP.During conductivity is tested, two outer arcuate electrodes 502 are connected in series with outside a piece
Resistance R, and measure the effective current I by resistancermsIt is indicated as conductivity.
When measurement, the impulse wave V of 6200Hz, 0.5V are led between two external electrodesrms, and effective current IrmsIt indicates
Conductivityσ.By change and the concatenated off chip resistor R of these electrodes, the sensitivity of conductivity measurement can be easily adjusted.Electricity
Conductance σ and effective current IrmsRelationship such as formula (1) shown in
Formula (1) follows Ohm's law, I in formulamaxIt is saturation current, by changing resistance R, I in circuitmaxIt can be directed to
Specific conductivity range optimizes.
Ionic conductivity is affected by temperature, and under different temperatures, electric current has deviation.The influence of water temperature can be by using formula
(2) it reduces.
In formula, σ0It is given temperature T0Under calibrated conductivity, σtIt is the conductivity under temperature T.Convolution (1) and formula (2)
And then we can describe the conductivity in solution with formula (4)
Detection to pH value and oxidation-reduction potential
PH value and oxidation-reduction potential are detected.In pH value and oxidation-reduction potential test, extreme electrode is sun
Pole (+), target are cathode (-), and minimum electrode is ORP detecting electrodes.Experiment shows in the energized state, containing chlorine
In the solution of ion, the cathode potential of sensor keeps relative constant, and the electrochemical reaction for generating stable cathode potential is platinum the moon
Active position in pole surface is chlorinated object by suction-operated and occupies, therefore cathode potential can be used as reference potential.In addition, positive
Electrode potential changes with pH value, and minimum electrode current potential changes with ORP, therefore measures the potential difference between anode and minimum electrode
For △ V1 (>0) and between cathode and minimum electrode potential difference △ V2 (<0).△ V2 indicate oxidation-reduction potential, anode with
Potential difference, that is, △ V1-△ V2 between cathode indicate pH value.PH value and oxidation-reduction potential and its corresponding potential difference are recorded,
It draws pH- (△ V1-△ V2) curve graphs respectively and ORP- △ V2 curve graphs, microprocessor passes through the current potential in detection sensor
Difference measures corresponding pH value and oxidation-reduction potential.In aquaculture, chlorion is generally existing in water, therefore should
Sensor can be used for water quality monitoring.
When the concentration of strong oxidizer (such as hypochlorite) is higher than 1ppm, significant changes may occur for cathode potential,
PH/ORP sensors will lose sensitivity.Influence of the strong oxidant solution to cathode potential can be reduced in electrode surface coating.
Chlorination PVC film is not easy to permeate hypochlorite, it is coated in electrode surface, blocking
ClO-Influence, keep cathode potential stabilization, sensor can continue to work normally.
The design of dual-electrode sensor
Detection to lead ion and other heavy metal ion
Two-electrode system is as shown in figure 3, two 5 microns of electrode gaps.5V power supplys and a 100k are connected between bipolar electrode
Sensor is immersed in the test solution containing lead ion and other heavy metal ion, measures the electricity at resistance both ends by the resistance of Ω
Pressure difference △ V are as signal.△ V reflect the overall impedance on electrode, and when the impedance between two electrodes reduces, △ V increase.
System is when being powered, since heavy metal ion (copper ion, iron ion and zinc ion) has reproducibility, on cathode
It is reduced into conductive metal.If the gap between the metal connection platinum electrode of reduction, the impedance of system can be remarkably decreased, it is
Electric current in system increases, and the voltage difference △ V on resistance R increase.The variation of the voltage difference △ V shown due to impedance variations is molten
Foundation existing for heavy metal in liquid.
Lead ion is the ion that conductive materials can be uniquely deposited around anode.Key reaction around anode is oxidation
Reaction, lead ion can be oxidized to conductive materials --- and brown lead oxide, chemical equation are
Pb2+-2e-+2H2O→PbO2+4H+ (5)
When the gap between the brown lead oxide of deposition connection platinum electrode, system impedance reduces, the voltage difference △ on resistance R
V increases.In two-electrode system, either lead ion exists or other heavy metal ion, which exist, can all cause △ V to increase, and passes
The Detection of Existence of ion can be effectively performed in sensor.
The design of four electrode sensors
In the solution containing lead ion and other heavy metal ion, in the energized state, heavy metal ion restores
Reactive deposition is on cathode, and lead ion occurs oxidation reaction and generates lead dioxide deposition on anode, this according to lead ion
It is as shown in Figure 4 to devise four electrode systems for characteristic.In figure, the small―gap suture between two, left side electrode and two, the right electrode is 5
Micron, the wide arc gap between intermediate two electrodes is 50 microns.The system can both detect lead ion and other heavy metal ion
Presence, and the maximum lead Division identification of toxicity can be come out.When sensor is connected as Aa-BB ', the electricity at resistor both ends
Pressure difference is measured as △ V1, to measure the impedance between anode and second electrode, carries out the measurement of lead ion；When sensor connects
For AA '-Bb when, the voltage difference at resistor both ends is measured as △ V2, to measure the impedance between cathode and third electrode, carry out
The measurement of other heavy metal ion.
Test experiments
The performance of sensor is tested using unique variable principle, excludes the interference of other factors.Due to sensor
Lead ion can only be detected and other heavy metal ion whether there is, and its concentration cannot be measured, therefore in detection lead ion and its
When his heavy metal ion, the variation of an alarm detection circuit electric current is connected in circuit, is sentenced by the way that whether alarm alarms
Disconnected Lead in Aqueous Solution and other heavy metal ion whether there is.Temperature, pH value, lead ion and other huge sum of moneys are only provided in table 1
Belong to the test result of ion.
1 experimental results of table
After tested, parameters variation is smaller, and alarm Normal Alarm is without exception, and sensor may be implemented to temperature, electricity
The accurate detection of conductance, pH value, oxidation-reduction potential, lead ion and other heavy metal ion, meets the needs of actual motion.
The platinum electrode Multifunction Sensor of the present invention can be to temperature, conductivity, pH value, oxidation-reduction potential, lead ion
Be detected with six water quality index of other heavy metal ion, overcome traditional water quality detection sensor testing result it is single lack
Point.Sensor is made of single layer PVDTi/Pt, since platinum electrode is inert electrode, so the sensor can be examined for a long time
It surveys.In addition the sensor made of this technique is at low cost, structure and is simple to manufacture, is with good economic efficiency, in water quality
There to be good development prospect in the application of detection.
The above is only the better embodiment to the present invention, not makees limit in any form to the present invention
System, every any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (3)
1. platinum electrode Multifunction Sensor, it is characterised in that：Including data acquisition module, data processing module, communication module and
Power module, data acquisition module is by temperature sensor, conductivity sensor, pH value ORP sensors, lead ion sensor and A/
D converters form, and data processing module is made of microprocessor, memory, and communication module is wireless communication module Zigbee, number
The heavy metals such as temperature, conductivity, pH value, oxidation-reduction potential, lead ion in water body are detected by sensor according to acquisition module
Ion, detection signal enter microprocessor through A/D converter, and microprocessor is filtered data, merges and stores, and communicates mould
Block realizes the communication between remote control center using wireless communication technique, and microprocessor is by the data handled well by converging
Node is transmitted to remote control center, if detecting water quality index not in prescribed limit, warning circuit is alarmed, in remote control
The heart inquires abnormal index and makes corresponding processing.
2. according to platinum electrode Multifunction Sensor described in claim 1, it is characterised in that：The temperature sensor, conductivity pass
Sensor, pH value ORP sensors, lead ion sensor are the three electrode target formula sensor made of platinum, three electrode target formula sensors
In, one of central electrode is that circle is located at center, and another two electrode is arc-shaped electrode respectively around central electrode.
3. according to platinum electrode Multifunction Sensor described in claim 1, it is characterised in that：The temperature sensor, conductivity pass
Sensor, pH value ORP sensors, lead ion sensor are dual-electrode sensor or four electrode sensors, wherein dual-electrode sensor
For two 5 microns of electrode gaps, it is connected to the resistance of 5V power supplys and a 100k Ω between bipolar electrode, sensor immersion is contained into lead
In ion and the test solution of other heavy metal ion；Between four two, electrode sensor left side electrodes, two, the right electrode
Small―gap suture is 5 microns, and the wide arc gap between intermediate two electrodes is 50 microns, and 5V power supplys and one are connected between two electrodes in left and right
The resistance of a 100k Ω immerses sensor in the test solution containing lead ion and other heavy metal ion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810463442.8A CN108627553B (en) | 2018-05-15 | 2018-05-15 | Platinum electrode multifunctional sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810463442.8A CN108627553B (en) | 2018-05-15 | 2018-05-15 | Platinum electrode multifunctional sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108627553A true CN108627553A (en) | 2018-10-09 |
| CN108627553B CN108627553B (en) | 2020-12-01 |
Family
ID=63693411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810463442.8A Active CN108627553B (en) | 2018-05-15 | 2018-05-15 | Platinum electrode multifunctional sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108627553B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009155647A1 (en) * | 2008-06-24 | 2009-12-30 | Water Harvesting Technologies Pty Ltd | Method and system for modelling water treatment and harvesting |
| CN203824983U (en) * | 2014-04-02 | 2014-09-10 | 云南永旺科技有限公司 | Cloud online comprehensive water quality analyzer |
| CN204390434U (en) * | 2015-01-19 | 2015-06-10 | 广西科技大学鹿山学院 | A kind of enterprise's industrial sewage intelligent early-warning system based on Internet of Things |
| CN204649725U (en) * | 2015-05-13 | 2015-09-16 | 浙江中通检测科技有限公司 | A kind of water quality real-time monitoring system based on Zigbee |
| CN105158296A (en) * | 2015-09-08 | 2015-12-16 | 无锡百灵传感技术有限公司 | Intelligent water quality monitoring system |
| CN105445339A (en) * | 2014-07-31 | 2016-03-30 | 天津大学 | Flexible differential array electrochemical glucose sensor and use method thereof |
| CN105606673A (en) * | 2016-02-03 | 2016-05-25 | 北京大学 | Chip applicable to electrochemical real-time PCR and preparation method of chip |
| CN206132752U (en) * | 2016-10-20 | 2017-04-26 | 汪明新 | Novel water quality testing appearance |
-
2018
- 2018-05-15 CN CN201810463442.8A patent/CN108627553B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009155647A1 (en) * | 2008-06-24 | 2009-12-30 | Water Harvesting Technologies Pty Ltd | Method and system for modelling water treatment and harvesting |
| CN203824983U (en) * | 2014-04-02 | 2014-09-10 | 云南永旺科技有限公司 | Cloud online comprehensive water quality analyzer |
| CN105445339A (en) * | 2014-07-31 | 2016-03-30 | 天津大学 | Flexible differential array electrochemical glucose sensor and use method thereof |
| CN204390434U (en) * | 2015-01-19 | 2015-06-10 | 广西科技大学鹿山学院 | A kind of enterprise's industrial sewage intelligent early-warning system based on Internet of Things |
| CN204649725U (en) * | 2015-05-13 | 2015-09-16 | 浙江中通检测科技有限公司 | A kind of water quality real-time monitoring system based on Zigbee |
| CN105158296A (en) * | 2015-09-08 | 2015-12-16 | 无锡百灵传感技术有限公司 | Intelligent water quality monitoring system |
| CN105606673A (en) * | 2016-02-03 | 2016-05-25 | 北京大学 | Chip applicable to electrochemical real-time PCR and preparation method of chip |
| CN206132752U (en) * | 2016-10-20 | 2017-04-26 | 汪明新 | Novel water quality testing appearance |
Non-Patent Citations (1)
| Title |
|---|
| WEN-CHI LIN等: "A Drinking Water Sensor for Lead and Other Heavy Metals", 《ANAL. CHEM.》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108627553B (en) | 2020-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105637375A (en) | Estimation of the state of charge of a positive electrolyte solution of a working redox flow battery cell without using any reference electrode | |
| CN111796007B (en) | Method and apparatus for measuring humidity using electrochemical gas sensor | |
| CN104155355A (en) | Oxygen sensor | |
| CN103336044B (en) | All solid-state ion selective electrode and preparation method and application thereof | |
| US3794575A (en) | Oxygen sensor | |
| GB2460130A (en) | Self calibrating reference electrode | |
| US9091642B2 (en) | Measuring transducer for determining a measured variable representing an activity of a target ion in a measured medium | |
| Westbroek et al. | Quality control of textile electrodes by electrochemical impedance spectroscopy | |
| CN108627553A (en) | Platinum electrode Multifunction Sensor | |
| CN110873741A (en) | Three-parameter intelligent compensation correction electrochemical online dissolved oxygen sensor | |
| Rau et al. | Characterization of a polypyrrole microsensor for nitrate and nitrite ions | |
| CN106018512A (en) | Dissolved oxygen sensor | |
| CN103063723B (en) | Solid hydrogen ion concentration electrode based on conductive polyaniline and preparing method thereof | |
| CN115290722A (en) | Residual chlorine and pH data acquisition card adopting constant voltage method | |
| CN103018295A (en) | Constant-potential solid pH detector | |
| JPH03172755A (en) | Oxygen detector | |
| CN109239162B (en) | Selenite ion selective electrode based on selenite doped polyaniline and preparation method thereof | |
| US6087651A (en) | Highly sensitive light reception element | |
| CN219830933U (en) | Electrochemical composite sensor | |
| Zhou et al. | A novel chemical sensor with multiple all-solid-state electrodes and its application in freshwater environmental monitoring | |
| CN103063721B (en) | Solid nitrite ion electrode based on conductive polyaniline and preparing method thereof | |
| CN109298055B (en) | Bromine ion electrode taking bromine ion doped polyaniline as sensitive film and preparation method thereof | |
| JP7438921B2 (en) | low power sensor memory | |
| CN103063722A (en) | Solid calcium ion electrode based on conductive polyaniline and preparing method thereof | |
| CN217155745U (en) | Sensing detection device and sensing detection system for leakage of lead-acid storage battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |