CN101398400B - Conductivity electrode flowing and mixing measuring systems - Google Patents
Conductivity electrode flowing and mixing measuring systems Download PDFInfo
- Publication number
- CN101398400B CN101398400B CN200710152054XA CN200710152054A CN101398400B CN 101398400 B CN101398400 B CN 101398400B CN 200710152054X A CN200710152054X A CN 200710152054XA CN 200710152054 A CN200710152054 A CN 200710152054A CN 101398400 B CN101398400 B CN 101398400B
- Authority
- CN
- China
- Prior art keywords
- electrode
- signal
- conductance
- circuit
- power supply
- 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.)
- Active
Links
Images
Abstract
The invention relates to a conductance electrode flow mixed measuring system, comprising a plurality of conductance electrodes, a plurality of temperature probes and a data acquisition system; wherein, the system also comprises a measuring and transmitting system which is respectively connected with the plurality of the conductance electrodes, the plurality of the temperature probes and the data acquisition system; the measuring and transmitting system comprises conductance electrode measuring channels which have the same quantity with the conductance electrodes, and temperature measuring channels which have the same quantity with the temperature probes. The conductance electrode flow mixing measuring system of the invention can obtain the accurate change of each measuring point in a flow field continuously and fast, has convenient installation of the conductance electrodes and can eliminate the influence of the change of the temperature to the concentration of electrolyte in the flow field.
Description
Technical field
The present invention relates to the fluid concentrations measurement mechanism, be specifically related to a kind of conductivity electrode flowing and mixing measuring systems.
Background technology
The flowing and mixing measurement needs in the convection cell heterogeneity to distinguish and accurate proportion measurement, all adopts the chemical tracer method generally speaking, and the concentration conversion that utilizes conductance electrode to measure chemical tracer is that the flow field is handed over and mixed the factor.When temperature one timing, interelectrode resistance R (Ω) is directly proportional with interelectrode distance L (cm) in the dielectric solution, with the area A (cm of electrode
2) be inversely proportional to, i.e. R=ρ L/A, ρ is a conductivity in the formula, unit is Ω cm, other two amounts L and A just can decide in the electrode back that completes in the formula, and the fluid concentrations that just can measure under the uniform temperature of each electrode changes like this, thereby further calculates the mixed factor of flow field friendship.
The equipment of measuring concentration at present is the single conductance electrode (for example conductivity meter) of instrument level, if all adopting similar devices to carry out flowing and mixing measures, not only financial cost is too high, and normal electrode is not easy to install in the flow field, can not satisfy the requirement rapidly, continuously that flowing and mixing is measured.In addition, in measuring process, temperature variation also can stream field in electrolytical concentration influential, influence measurement result.
Summary of the invention
The object of the present invention is to provide a kind of accurate variation that can obtain each measurement point in the flow field continuously, fast, conductance electrode is convenient to install, and can effectively get rid of the conductivity electrode flowing and mixing measuring systems of electrolyte concentration influence in the temperature variation stream field.
Conductivity electrode flowing and mixing measuring systems of the present invention, it comprises a plurality of conductance electrodes, a plurality of temp probe and a data acquisition system; This system also comprises a measurement transmitting system that links to each other respectively with a plurality of conductance electrodes, a plurality of temp probe and data acquisition system (DAS); Described measurement transmitting system comprises the conductance electrode measurement passage consistent with conductance electrode quantity and measures passage with temp probe quantity consistent temperature; Described each conductance electrode is measured passage and is comprised oscillator, signal amplification circuit, detecting circuit and signal isolation circuit, oscillator is to conductance electrode excitation power supply and eliminate electrode polarization, signal amplification circuit receives and amplifies the voltage signal that conductance electrode sends, and detecting circuit filters and eliminate high-frequency interferencing signal to the signal of signal amplification circuit output; Signal isolation circuit will be outputed to data acquisition system (DAS) and be prevented outside electromagnetic interference by the voltage signal of detecting circuit input; Described each temperature survey passage comprises constant-current circuit, signal amplification circuit, signal isolation circuit, constant-current source circuit is to temp probe excitation power supply, signal amplification circuit receives and amplifies the voltage signal that temp probe sends, and signal isolation circuit will be outputed to data acquisition system (DAS) and be prevented outside electromagnetic interference by the voltage signal of signal amplification circuit input.
Aforesaid a kind of conductivity electrode flowing and mixing measuring systems, described each conductance electrode is measured passage and is all linked to each other with two power supply modules, a power module is given oscillator, signal amplification circuit, detecting circuit and signal isolation circuit supplying power for input end, and another power module is given the power supply of signal isolation circuit output terminal;
Aforesaid a kind of conductivity electrode flowing and mixing measuring systems, described each temperature survey passage all links to each other with two power supply modules, a power module is given supplying power for input end in constant-current source circuit, signal amplification circuit, the signal isolation circuit, and another power module is given output terminal power supply in the signal isolation circuit.
Aforesaid a kind of conductivity electrode flowing and mixing measuring systems; described conductance electrode comprises two platinum sheets that are embedded in the glass protection sleeve abreast, link to each other with electrode cable respectively; glass protection sleeve is fixedlyed connected with plastic base, is provided with bolt hole on plastic base.
Aforesaid a kind of conductivity electrode flowing and mixing measuring systems, described electrode cable are silver-plated 11/0.2 lead of teflon insulation layer copper.
Aforesaid a kind of conductivity electrode flowing and mixing measuring systems, the temp probe that is adopted is the Pt100 thermistor.
Effect of the present invention is: conductivity electrode flowing and mixing measuring systems of the present invention, comprise that is measured a transmitting system, and its each measurement passage is a modularization, is convenient to change and expansion; Each is measured passage and is not contained A/D converter and D/A converter, and output signal is with the continuous real-time change of detected solution, and the processing of data, calculating are finished by the rear end high-speed data acquistion system, and each real-time of measuring channel reliability, data greatly improves.Conductance electrode by corresponding connection with conductance electrode is measured the measurement rapidly, continuously that passage is realized electrolyte concentration in the stream field, and measurement result is real-time transmitted to data acquisition system (DAS).Also comprise temp probe and coupled temperature survey passage in the measurement transmitting system, be used for temperature compensation measurement result.Conductance electrode is simple in structure among the present invention, is convenient to install and use, and is adapted at intensive installation in the narrow space in flow field, and electrode constant stability, consistance are good, and electrode constant remains in 0.5 ± 10% scope, electrode measurement precision 0.1%.The electrode cable that adopts is silver-plated 11/0.2 lead of the special-purpose teflon insulation layer copper of electrode, improves the insulativity of electrode cable in water, and the electrode cable insulation reaches 20M Ω.
Description of drawings
Fig. 1 is a kind of conductivity electrode flowing and mixing measuring systems structural representation;
Fig. 2 is a kind of conductance electrode structural representation;
Fig. 3 is that a kind of conductance electrode is measured the channel architecture synoptic diagram;
Fig. 4 is a kind of temperature survey channel architecture synoptic diagram;
1. platinum sheets among the figure; 2. glass protection sleeve; 3. plastic base; 4. bolt hole.
Embodiment
Below in conjunction with accompanying drawing conductivity electrode flowing and mixing measuring systems of the present invention is described further.
As shown in Figure 1, conductivity electrode flowing and mixing measuring systems of the present invention, it comprises a plurality of conductance electrodes, a plurality of temp probes, a data acquisition system, a measurement transmitting system that links to each other respectively with a plurality of conductance electrodes, a plurality of temp probe and data acquisition system (DAS).This measurement transmitting system comprises the conductance electrode measurement passage consistent with conductance electrode quantity and measures passage with temp probe quantity consistent temperature.
As shown in Figure 2, conductance electrode comprises two platinum sheets 1 that are embedded in the glass protection sleeve 2 abreast, are weldingly connected with electrode cable respectively, and glass protection sleeve 2 is adhesively fixed with plastic base 3, is provided with bolt hole 4 on plastic base 3.Electrode cable is silver-plated 11/0.2 lead of teflon insulation layer copper.Handle and anti-oxidant treatment through surface smoothness on the platinum sheet surface of adopting.Glass protection sleeve 2 is used for an overfill protection platinum sheet 1; Conductance electrode is provided with bolt hole 4 and is fixed in the flow field by being passed at bolt on the plastic base 3.
As shown in Figure 3, each conductance electrode is measured passage and is comprised oscillator, signal amplification circuit, detecting circuit and signal isolation circuit, oscillator is to conductance electrode excitation power supply and eliminate electrode polarization, signal amplification circuit receives and amplifies the voltage signal that conductance electrode sends, and detecting circuit filters and eliminate high-frequency interferencing signal to the signal of signal amplification circuit output; Signal isolation circuit will be outputed to data acquisition system (DAS) and be prevented outside electromagnetic interference by the voltage signal of detecting circuit input, and the voltage signal that signal isolation circuit is exported to data acquisition system (DAS) is 0-5V.Each conductance electrode is measured passage and is all linked to each other with two power supply modules, and a power module is given oscillator, signal amplification circuit, detecting circuit and signal isolation circuit supplying power for input end, and another power module is given the power supply of signal isolation circuit output terminal.
As shown in Figure 4, each temperature survey passage comprises constant-current circuit, signal amplification circuit, signal isolation circuit, constant-current source circuit is to temp probe excitation power supply, the voltage signal that signal amplification circuit receives and the amplification temp probe sends, signal isolation circuit will be outputed to data acquisition system (DAS) and be prevented outside electromagnetic interference by the voltage signal of signal amplification circuit input, and the voltage signal that signal isolation circuit is exported to data acquisition system (DAS) is 0-5V.Each temperature survey passage all links to each other with two power supply modules, and a power module is given supplying power for input end in constant-current source circuit, signal amplification circuit, the signal isolation circuit, and another power module is given output terminal power supply in the signal isolation circuit.The temp probe that adopts is the Pt100 thermistor, and the resistance of thermistor changes with variation of temperature.
Each is measured passage and all adopts pure analog electrical bridge circuit to measure transmitting system, by power supply power supply separately, disturbs each other preventing.
In the flowing and mixing experiment with measuring, the quantity of the quantity of the conductance electrode of employing and installation, temp probe and installation are determined according to the concrete condition (as size, shape etc.) and the measurement requirement in flow field to be measured.For example, in diameter is 1 meter cylindrical fluid passage, on disk, evenly arranges 120 conductance electrodes are installed, in the flow field, prolong fluid flow direction and arrange 10 temp probes at interval.Before on-test, in the calibration solution for preparing, conductance electrode is carried out constant calibration earlier, be input in the data acquisition system (DAS) as basis demarcating good electrode constant then.To demarcate good conductance electrode again and adopt bolted in the flow field, the installation of conductance electrode needs to withstand washing away of fluid in the flow field, and the measurement of conductance electrode should be avoided influencing in the conductance electrode downstream in the electrode cable installation site.When carrying out the flowing and mixing experiment with measuring, in runner, inject KCl solution tracer agent, after tracer agent enters the flow field, the dielectric conductance rate changes, the conductivity signal of conductance electrode is measured through conductance electrode and is inputed to data acquisition system (DAS) after passage is converted into 0～5V voltage signal, data acquisition system (DAS) is measured magnetoelectricity and is pressed signal, goes out conductivity value with the conductance electrode constant calculations that prestores again.The voltage signal relevant with temperature that temp probe produces is converted into 0～5V voltage signal through the temperature survey passage and inputs to data acquisition system (DAS), and data acquisition system (DAS) calculates the temperature value of measurement point.The final data acquisition system is carried out temperature compensation to calculating the conductivity of gained through the temperature value that calculates gained, obtains more accurate solution concentration value.After the solution concentration value that obtains a measurement point, compare with the flow field background concentration before the injection tracer agent, obtain the concentration change value of a measurement point, pass through mass-conservation equation again, draw the share of the medium of each measurement point, and then obtain the flowing and mixing factor in flow field from runner.
Claims (5)
1. conductivity electrode flowing and mixing measuring systems, it comprises a plurality of conductance electrodes, a plurality of temp probe and a data acquisition system, it is characterized in that:
This system also comprises a measurement transmitting system that links to each other respectively with a plurality of conductance electrodes, a plurality of temp probe and data acquisition system (DAS); Described measurement transmitting system comprises the conductance electrode measurement passage consistent with conductance electrode quantity and measures passage with temp probe quantity consistent temperature;
Described each conductance electrode is measured passage and is comprised oscillator, signal amplification circuit, detecting circuit and signal isolation circuit, oscillator is to conductance electrode excitation power supply and eliminate electrode polarization, signal amplification circuit receives and amplifies the voltage signal that conductance electrode sends, and detecting circuit filters and eliminate high-frequency interferencing signal to the signal of signal amplification circuit output; Signal isolation circuit will be outputed to data acquisition system (DAS) and be prevented outside electromagnetic interference by the voltage signal of detecting circuit input;
Described each temperature survey passage comprises constant-current source circuit, signal amplification circuit, signal isolation circuit, constant-current source circuit is to temp probe excitation power supply, signal amplification circuit receives and amplifies the voltage signal that temp probe sends, and signal isolation circuit will be outputed to data acquisition system (DAS) and be prevented outside electromagnetic interference by the voltage signal of signal amplification circuit input.
2. a kind of conductivity electrode flowing and mixing measuring systems according to claim 1, it is characterized in that: described each conductance electrode is measured passage and is all linked to each other with two power supply modules, a power module is given oscillator, signal amplification circuit, detecting circuit and signal isolation circuit supplying power for input end, and another power module is given the power supply of signal isolation circuit output terminal;
3. a kind of conductivity electrode flowing and mixing measuring systems according to claim 1, it is characterized in that: described each temperature survey passage all links to each other with two power supply modules, a power module is given supplying power for input end in constant-current source circuit, signal amplification circuit, the signal isolation circuit, and another power module is given output terminal power supply in the signal isolation circuit.
4. a kind of conductivity electrode flowing and mixing measuring systems according to claim 1; it is characterized in that: described conductance electrode comprises two platinum sheets (1) that are embedded in the glass protection sleeve (2) abreast, link to each other with electrode cable respectively; glass protection sleeve (2) is fixedlyed connected with plastic base (3), is provided with bolt hole (4) on plastic base (3).
5. a kind of conductivity electrode flowing and mixing measuring systems according to claim 1 is characterized in that: the temp probe that is adopted is the Pt100 thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710152054XA CN101398400B (en) | 2007-09-28 | 2007-09-28 | Conductivity electrode flowing and mixing measuring systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710152054XA CN101398400B (en) | 2007-09-28 | 2007-09-28 | Conductivity electrode flowing and mixing measuring systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101398400A CN101398400A (en) | 2009-04-01 |
| CN101398400B true CN101398400B (en) | 2011-11-09 |
Family
ID=40517104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710152054XA Active CN101398400B (en) | 2007-09-28 | 2007-09-28 | Conductivity electrode flowing and mixing measuring systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101398400B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9023555B2 (en) * | 2012-02-24 | 2015-05-05 | Alan Devoe | Method of making a fuel cell device |
| CN113189167B (en) * | 2021-02-24 | 2022-06-17 | 中国核动力研究设计院 | Annular electrochemical sensor probe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1460892A (en) * | 1973-01-19 | 1977-01-06 | Malcom Ellis Ltd | Apparatus for m'asuring the electrical conductivity of a liquor sample |
| US4362994A (en) * | 1980-07-14 | 1982-12-07 | Chemed Corporation | Self alarming five single electrodes conductivity cell |
| CN88100066A (en) * | 1987-01-09 | 1988-11-23 | 株式会社日立制作所 | Water quality management method and conductivity measuring method that is adopted and device |
| CN1211733A (en) * | 1998-03-09 | 1999-03-24 | 金山公夫 | Electrolyte solution concentration measurer |
| CN1673731A (en) * | 2005-05-11 | 2005-09-28 | 中国科学院力学研究所 | Apparatus and method for measuring conducting fluid density |
| CN1715928A (en) * | 2005-02-02 | 2006-01-04 | 上海东方机电科技公司 | Remote on-line analytic detector for conductivity, pH value and oxygen dissolving value |
| JP2007212324A (en) * | 2006-02-10 | 2007-08-23 | Horiba Advanced Techno Co Ltd | Conductivity detector |
-
2007
- 2007-09-28 CN CN200710152054XA patent/CN101398400B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1460892A (en) * | 1973-01-19 | 1977-01-06 | Malcom Ellis Ltd | Apparatus for m'asuring the electrical conductivity of a liquor sample |
| US4362994A (en) * | 1980-07-14 | 1982-12-07 | Chemed Corporation | Self alarming five single electrodes conductivity cell |
| CN88100066A (en) * | 1987-01-09 | 1988-11-23 | 株式会社日立制作所 | Water quality management method and conductivity measuring method that is adopted and device |
| CN1211733A (en) * | 1998-03-09 | 1999-03-24 | 金山公夫 | Electrolyte solution concentration measurer |
| CN1715928A (en) * | 2005-02-02 | 2006-01-04 | 上海东方机电科技公司 | Remote on-line analytic detector for conductivity, pH value and oxygen dissolving value |
| CN1673731A (en) * | 2005-05-11 | 2005-09-28 | 中国科学院力学研究所 | Apparatus and method for measuring conducting fluid density |
| JP2007212324A (en) * | 2006-02-10 | 2007-08-23 | Horiba Advanced Techno Co Ltd | Conductivity detector |
Non-Patent Citations (1)
| Title |
|---|
| 黄雄斌等.应用电导探针测定固－液两相流的局部速度.《高校化学工程学报》.1995,第9卷(第2期),187-190. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101398400A (en) | 2009-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106226392B (en) | Water-oil phase flow containing rate measurement method based on ultrasonic attenuation mechanism model | |
| CN101629918B (en) | Device for testing water content of soil based on theory of phase detection and method thereof | |
| CN101556234A (en) | Gas-water two phase flow multiparameter measuring method and device | |
| CN102749154A (en) | Method, device and energy meter for measuring temperature of fluid medium by ultrasonic wave | |
| CN101398400B (en) | Conductivity electrode flowing and mixing measuring systems | |
| CN203561608U (en) | Portable soil corrosion speed measuring instrument | |
| Mezzera et al. | A 7-parameter platform for smart and wireless networks monitoring on-line water quality | |
| CN1996003A (en) | On-line monitoring method for concentration rate of circulating cooling water | |
| CN104515562A (en) | Multiphase flow micro-differential pressure measuring device and flow metering method | |
| CN204373715U (en) | A kind of polyphasic flow micro-pressure-difference measurement mechanism | |
| CN106291119A (en) | A kind of conductivity measuring method, circuit and conductance instrument | |
| CN202562561U (en) | Water level measuring device | |
| CN103196357A (en) | Metal-surface wall thickness detector with probes distributed in matrix mode and measurement method thereof | |
| CN100520384C (en) | Four-electrode original position soil salt content measuring method | |
| CN100514049C (en) | Original position soil salt content sensing transducer | |
| CN206146893U (en) | Dead -stop titration appearance calibrating device | |
| Prausnitz et al. | Turbulent concentration fluctuations through electrical conductivity measurements | |
| CN201222042Y (en) | Apparatus for measuring material thermal conductivity parameter | |
| CN104865114A (en) | Preparation method of standard sodium solution | |
| CN204461518U (en) | A kind of heating type turbine integral type flowmeter | |
| CN109765334B (en) | Gas-liquid two-phase flow gas content measuring device and method in particle accumulation bed | |
| CN103018295A (en) | Constant-potential solid pH detector | |
| CN202956358U (en) | Potential of hydrogen (PH) detector | |
| CN105547383A (en) | Fluid flow measuring method based on electromagnetic principle | |
| CN102322981A (en) | Alternative type electromagnetic jet-flow heat meter and detecting method of same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |