CN104990970A - Dissolved oxygen sensor with automatic temperature compensating - Google Patents
Dissolved oxygen sensor with automatic temperature compensating Download PDFInfo
- Publication number
- CN104990970A CN104990970A CN201510352649.4A CN201510352649A CN104990970A CN 104990970 A CN104990970 A CN 104990970A CN 201510352649 A CN201510352649 A CN 201510352649A CN 104990970 A CN104990970 A CN 104990970A
- Authority
- CN
- China
- Prior art keywords
- circuit
- dissolved oxygen
- compensation
- negative electrode
- sensor
- 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.)
- Pending
Links
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a dissolved oxygen sensor with automatic temperature compensating. The dissolved oxygen sensor with the automatic temperature compensating comprises a sensor probe body and a circuit unit. The circuit unit is connected with the sensor probe body. The probe body comprises a rubber sealing part, a thermistor, a positive electrode, an electrolyte solution cabin, a negative electrode, an oxygen permeating membrane and a stirring brush. The thermistor is arranged on the right side of the probe body, the positive electrode is connected with the electrolyte solution cabin, the negative electrode is arranged below the electrolyte solution cabin, the oxygen permeating membrane is arranged under the negative electrode, and the stirring brush is arranged on the left side of the probe body. According to the dissolved oxygen sensor with the automatic temperature compensating, the design is reasonable, using is convenient, the structure is simple, the performance is stable, the service life is long, the volume is small, the measuring accuracy is high, the error is low, and the good application value is achieved.
Description
Technical field
The present invention is specifically related to a kind of dissolved oxygen sensor with temperature self-compensation.
Background technology
Dissolved oxygen DO is the important indicator of degree of water pollution, is also the overall target weighing water quality.Therefore, the measurement of Dissolved Oxygen in Water content, the development for environmental monitoring and culture fishery is all significant.Current dissolved oxygen sensing method mainly contains iodimetric titration and amperometric, because iodimetric titration is a kind of pure chemistry method, operates more loaded down with trivial details, be not suitable for quick and precisely with continuous coverage dissolved oxygen DO.
Summary of the invention
The object of the invention is, for solving above-mentioned deficiency, to provide a kind of dissolved oxygen sensor with temperature self-compensation.
The object of the invention is to be achieved through the following technical solutions:
A kind of dissolved oxygen sensor with temperature self-compensation, comprise sensor and visit body and circuit unit, circuit unit connecting sensor visits body, described spy body comprises rubber seal, thermistor, anode, electrolysis liquid tank, negative electrode, oxygen permeation membrane and Mixing Brush, thermistor is located at the right side visiting body, and anode connects electrolysis liquid tank, and negative electrode is below electrolysis liquid tank, oxygen permeation membrane is located at below negative electrode, and Mixing Brush is located at the left side visiting body.
The present invention also has some technical characteristics like this:
Described circuit unit comprises dissolved oxygen electrode, current-voltage conversion circuit, filtering circuit, serial communication circuit, temperature-compensation circuit, A/D convertor circuit, clock circuit, PIC18F2520 controller, control relay circuit, storage unit and DC speed-reducing, dissolved oxygen electrode connects current-voltage conversion circuit, current-voltage conversion circuit connects filtering circuit, temperature-compensation circuit connects A/D convertor circuit, serial communication circuit, A/D convertor circuit, clock circuit, control relay circuit and storage unit are connected PIC18F2520 controller respectively, control relay circuit connects DC speed-reducing.
Described anode adopts fine silver material, and described negative electrode adopts thousand pure golds.
Described oxygen permeation membrane adopts teflon membrane filter.
The present invention has effect useful as follows:
The present invention is reasonable in design, easy to use, and structure is simple, stable performance, and the life-span is long, volume is little, measuring accuracy is high, and error is little, has good using value.
Accompanying drawing explanation
Fig. 1 is spy body structure schematic diagram of the present invention;
Fig. 2 is circuit unit structural representation of the present invention;
Fig. 3 is temperature-compensation circuit of the present invention;
Fig. 4 is A/D convertor circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated:
As shown in Figure 1, a kind of dissolved oxygen sensor with temperature self-compensation, comprise sensor and visit body and circuit unit, circuit unit connecting sensor visits body, and described spy body comprises rubber seal 1, thermistor 2, anode 3, electrolysis liquid tank 4, negative electrode 5, oxygen permeation membrane 6 and Mixing Brush 7, thermistor 2 is located at the right side visiting body, and anode 3 connects electrolysis liquid tank 4, and negative electrode 5 is below electrolysis liquid tank 4, and oxygen permeation membrane 6 is located at below negative electrode 5, and Mixing Brush 7 is located at the left side visiting body, and circuit unit comprises dissolved oxygen electrode 8, current-voltage conversion circuit 9, filtering circuit 10, serial communication circuit 11, temperature-compensation circuit 12, A/D convertor circuit 13, clock circuit 14, PIC18F2520 controller 15, control relay circuit 16, storage unit 17 and DC speed-reducing 18, dissolved oxygen electrode 8 connects current-voltage conversion circuit 9, and current-voltage conversion circuit 9 connects filtering circuit 10, and temperature-compensation circuit 12 connects A/D convertor circuit 13, serial communication circuit 11, A/D convertor circuit 13, clock circuit 14, control relay circuit is connected PIC18F2520 controller 15 respectively with 16 storage unit 17, and control relay circuit 16 connects DC speed-reducing 18, and anode adopts fine silver material, and described negative electrode adopts thousand pure golds, and oxygen permeation membrane adopts teflon membrane filter.
When sensor is measured, between anode and negative electrode, add the polarizing voltage of 0.75V.Due to this potential difference (PD), make anode metal ion enter electrolytic solution, if negative pole aerobic exists, then reduction reaction generation current occurs.The size of electric current is relevant with water oxygen dividing potential drop under certain condition, and
Water oxygen dividing potential drop is directly proportional to the concentration of dissolved oxygen DO, and when partial pressure of oxygen changes, the amount of oxygen infiltered in film also changes, and visits body electric current and also changes in proportion, so the output current of sensor reflects the concentration of oxygen in water.
In oxygen-saturated pure water, measure dissolved oxygen electrode output current at different temperatures, thus calculate the temperature coefficient K of different temperatures bottom electrode, can table look-up according to current solution temperature value during measurement compensates measurement result.
Claims (4)
1. the dissolved oxygen sensor with temperature self-compensation, comprise sensor and visit body and circuit unit, circuit unit connecting sensor visits body, it is characterized in that: described spy body comprises rubber seal, thermistor, anode, electrolysis liquid tank, negative electrode, oxygen permeation membrane and Mixing Brush, thermistor is located at the right side visiting body, and anode connects electrolysis liquid tank, and negative electrode is below electrolysis liquid tank, oxygen permeation membrane is located at below negative electrode, and Mixing Brush is located at the left side visiting body.
2. a kind of dissolved oxygen sensor with temperature self-compensation as claimed in claim 1, it is characterized in that: described circuit unit comprises dissolved oxygen electrode, current-voltage conversion circuit, filtering circuit, serial communication circuit, temperature-compensation circuit, A/D convertor circuit, clock circuit, PIC18F2520 controller, control relay circuit, storage unit and DC speed-reducing, dissolved oxygen electrode connects current-voltage conversion circuit, current-voltage conversion circuit connects filtering circuit, temperature-compensation circuit connects A/D convertor circuit, serial communication circuit, A/D convertor circuit, clock circuit, control relay circuit and storage unit are connected PIC18F2520 controller respectively, control relay circuit connects DC speed-reducing.
3. a kind of dissolved oxygen sensor with temperature self-compensation as claimed in claim 1, is characterized in that: described anode adopts fine silver material, and described negative electrode adopts thousand pure golds.
4. a kind of dissolved oxygen sensor with temperature self-compensation as claimed in claim 1, is characterized in that: described oxygen permeation membrane adopts teflon membrane filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352649.4A CN104990970A (en) | 2015-06-24 | 2015-06-24 | Dissolved oxygen sensor with automatic temperature compensating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352649.4A CN104990970A (en) | 2015-06-24 | 2015-06-24 | Dissolved oxygen sensor with automatic temperature compensating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104990970A true CN104990970A (en) | 2015-10-21 |
Family
ID=54302809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510352649.4A Pending CN104990970A (en) | 2015-06-24 | 2015-06-24 | Dissolved oxygen sensor with automatic temperature compensating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104990970A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87201222U (en) * | 1987-04-04 | 1988-01-20 | 厦门大学 | Dissolved oxygen transducer |
| CN1045183A (en) * | 1989-02-24 | 1990-09-05 | 王庭阳 | The accurate pen type pH meter of auto thermal compensation |
| CN2083294U (en) * | 1990-11-23 | 1991-08-21 | 浙江大学 | Multi-point dissolved oxygen electrode having electrolyte |
| CN1177740A (en) * | 1996-07-19 | 1998-04-01 | 泰里迪尼工业公司 | Temp.-compensation electrochemical gas detector and method for tracing gas temp. change |
| CN101533031A (en) * | 2009-04-15 | 2009-09-16 | 中国农业大学 | Dissolved oxygen intelligent transducer |
| CN101839879A (en) * | 2010-04-13 | 2010-09-22 | 中国农业大学 | Aquiculture detecting instrument and detection method |
| CN201681276U (en) * | 2010-04-27 | 2010-12-22 | 天津科技大学 | Device for detecting dissolved oxygen content of fish pond and controlling aeration and oxygenation |
| CN103558281A (en) * | 2013-11-04 | 2014-02-05 | 天津市森罗科技发展有限责任公司 | Temperature compensating circuit of oxygen sensor |
| CN104155355A (en) * | 2014-08-20 | 2014-11-19 | 黄崇艺 | Oxygen sensor |
| CN104280442A (en) * | 2013-07-12 | 2015-01-14 | 株式会社杰士汤浅国际 | Galvanic cell type oxygen sensor |
| CN104316567A (en) * | 2014-10-13 | 2015-01-28 | 陕西高新实业有限公司 | Online pH value monitoring system |
-
2015
- 2015-06-24 CN CN201510352649.4A patent/CN104990970A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87201222U (en) * | 1987-04-04 | 1988-01-20 | 厦门大学 | Dissolved oxygen transducer |
| CN1045183A (en) * | 1989-02-24 | 1990-09-05 | 王庭阳 | The accurate pen type pH meter of auto thermal compensation |
| CN2083294U (en) * | 1990-11-23 | 1991-08-21 | 浙江大学 | Multi-point dissolved oxygen electrode having electrolyte |
| CN1177740A (en) * | 1996-07-19 | 1998-04-01 | 泰里迪尼工业公司 | Temp.-compensation electrochemical gas detector and method for tracing gas temp. change |
| CN101533031A (en) * | 2009-04-15 | 2009-09-16 | 中国农业大学 | Dissolved oxygen intelligent transducer |
| CN101839879A (en) * | 2010-04-13 | 2010-09-22 | 中国农业大学 | Aquiculture detecting instrument and detection method |
| CN201681276U (en) * | 2010-04-27 | 2010-12-22 | 天津科技大学 | Device for detecting dissolved oxygen content of fish pond and controlling aeration and oxygenation |
| CN104280442A (en) * | 2013-07-12 | 2015-01-14 | 株式会社杰士汤浅国际 | Galvanic cell type oxygen sensor |
| CN103558281A (en) * | 2013-11-04 | 2014-02-05 | 天津市森罗科技发展有限责任公司 | Temperature compensating circuit of oxygen sensor |
| CN104155355A (en) * | 2014-08-20 | 2014-11-19 | 黄崇艺 | Oxygen sensor |
| CN104316567A (en) * | 2014-10-13 | 2015-01-28 | 陕西高新实业有限公司 | Online pH value monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10388978B2 (en) | Methods for determining state of charge and calibrating reference electrodes in a redox flow battery | |
| Wang et al. | A novel amperometric O2 gas sensor based on supported room‐temperature ionic liquid porous polyethylene membrane‐coated electrodes | |
| CN105794021B (en) | Method and apparatus for measuring transient state of charge using inlet/outlet potentials | |
| US11929528B2 (en) | Apparatus and method for determining state of charge in a redox flow battery via limiting currents | |
| EP3719487B1 (en) | Method and apparatus for measuring humidity using an electrochemical gas sensor | |
| CN104155355A (en) | Oxygen sensor | |
| CN109001275A (en) | A kind of three-electrode electro Chemical dissolved oxygen sensor | |
| Fleige et al. | Evaluation of temperature and electrolyte concentration dependent Oxygen solubility and diffusivity in phosphoric acid | |
| Geng et al. | An alternating pulse electrochemical methanol concentration sensor for direct methanol fuel cells | |
| CN213875514U (en) | Measuring device for membrane ion migration number | |
| CN110873741A (en) | Three-parameter intelligent compensation correction electrochemical online dissolved oxygen sensor | |
| CN104990970A (en) | Dissolved oxygen sensor with automatic temperature compensating | |
| US8382974B2 (en) | Sensor to measure a concentration of alkali alcoholate | |
| CN112710717B (en) | Oxidation current type sensor for measuring methanol concentration and calculation method thereof | |
| Wang et al. | How to choose suitable reference electrode and aqueous electrolyte to avoid error in electrochemical measurements? | |
| CN201477068U (en) | Salt electrolysis cell | |
| JP2010243452A (en) | Method and instrument for continuously measuring concentration of peracetic acid | |
| RU198483U1 (en) | Luggin capillary device for membrane-electrode blocks of flow-through electrochemical reactors and current sources | |
| CN105375037B (en) | A kind of solid state reference electrode and preparation method thereof | |
| JP2004125668A (en) | Oxidation-reduction potential measuring instrument | |
| CN203203960U (en) | Electrode used for measuring dissolved oxygen | |
| CN219830933U (en) | Electrochemical composite sensor | |
| CN201555824U (en) | Electrolytic cell for determining transport number of ions | |
| CN205991959U (en) | The miniature electrochemical gas sensor of liquid and gas sensing signaling conversion circuit | |
| CN204128998U (en) | For detecting the detecting device of urine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151021 |
|
| WD01 | Invention patent application deemed withdrawn after publication |