CN1163745C - Electrolyte solution concentration measurer - Google Patents
Electrolyte solution concentration measurer Download PDFInfo
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- CN1163745C CN1163745C CNB981060773A CN98106077A CN1163745C CN 1163745 C CN1163745 C CN 1163745C CN B981060773 A CNB981060773 A CN B981060773A CN 98106077 A CN98106077 A CN 98106077A CN 1163745 C CN1163745 C CN 1163745C
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- electrolyte solution
- electrode assembly
- electrode
- tubular
- concentration
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Abstract
The present invention relates to a measurer for the concentration of electrolyte solution, which comprises a signal source, an electrode device, a platy shielding plate and a temperature sensor, wherein the electrode device is composed of four cylindrical electrodes which are coaxially arranged and have different diameters; two cylindrical electrodes are respectively connected with two output ends of the signal source, and the other two cylindrical electrodes output AC voltage V1. The platy shielding plate has a certain distance from the bottom side of the electrode device, and the area of the platy shielding plate is not less than the axial projection area of the electrode device; the temperature sensor is used for outputting a voltage signal Vt denoting the temperature of the electrolyte solution. The concentration C of the electrolyte solution is equal to (V1, Vt). The measurer can continuously and accurately measure the concentration of the electrolyte solution within a large temperature and concentration range.
Description
Technical field
The present invention relates to a kind of electrolyte solution concentration measurer, more particularly, relate to a kind of electrolyte solution determinator of measuring concentration of electrolyte solutions with conductance method.
Background technology
Conductance method is to measure concentration of electrolyte solutions a kind of method commonly used.The technology of measuring in the laboratory under the normal temperature is widely known by the people.But, the electricity of electrolyte solution has the feature that the electricity that is different from plain conductor is led because leading, therefore under high temperature, high concentration, the electricity of electrolyte solution is led when measuring, lose linear relationship between the concentration of its signal of sensor and the electrolyte solution of surveying and the temperature.In the use field, though the brine concentration measuring instrument of having implemented temperature compensation in 10 to 50 ℃ of scopes has been arranged, its measurement range only limits in 0 to 3% (weight) scope, and the occasion that changes significantly in solar pond equitemperature and concentration can not be suitable at all.In this case, can only take a sample at the scene, measure the concentration of electrolyte solution then in laboratory using gravimetric method etc.The shape of electrode used therein is varied, and commonly used is needle electrode.Though the precedent of utilizing needle electrode to measure electrolyte concentration in the solar pond is arranged,, thereby makes measurement result inaccurate when electrode during, its detecting signal generation obvious variation near solid face such as the sidewall of solar pond, bottom surfaces.
The purpose of this invention is to provide a kind of electrolyte solution concentration measurer, it can accurately measure the concentration of electrolyte solution continuously in bigger temperature and concentration range.
Summary of the invention
For this reason, the invention provides a kind of electrolyte solution concentration measurer, comprising:
Signal source is used to produce one and exchanges or pulse voltage signal; Electrode assembly, four reducing tubular electrodes by coaxial arrangement are formed, described tubular electrode is made by corrosion resistant metal material, also fixing with insulating resin filling heat-resisting, corrosion resistance therebetween, draw the input end of described electrode assembly from two tubular electrodes wherein, be connected with two output terminals of described signal source respectively, draw the output terminal of described electrode assembly, export one and exchange or pulse voltage from two other tubular electrode; The tabular barricade, the bottom side of itself and described electrode assembly maintains a certain distance, and its area is not less than the axial projective area of described electrode assembly; Temperature sensor is used to export the voltage signal of representing described electrolyte solution temperature; Can utilize following formula to obtain the concentration of described electrolyte solution:
C＝f(V
1，V
t)
In the formula, C represents the concentration of described electrolyte solution, V
tBe the voltage of the described electrolyte solution temperature of expression, V
1Interchange or the pulse voltage of representing described electrode assembly output, f representative function relation.
According to electrolyte solution concentration measurer of the present invention, in the periphery of described electrode assembly a tubular guarded electrode that metal and described electrode assembly is coaxial is set, itself and the insulation of described tubular electrode and with described tabular guarded electrode ground connection together.
According to electrolyte solution concentration measurer of the present invention, in the loop of described signal source and described tubular electrode composition, also be connected in series with a resistance, can calculate electric current by the voltage of measuring described resistance two ends, thereby judge the whether fouling of described electrode assembly by described electrolyte solution.In addition, it also comprises: an A/D converter, and it accepts the voltage signal of the described electrolyte solution temperature of expression of described temperature sensor output, the interchange of described electrode assembly output or the voltage at pulse voltage and described resistance two ends, carries out analog to digital conversion; A computing machine is used to accept the output of described A/D converter, realize to the concentration of described electrolyte solution measure automatically and continuously and to the supervision of described electrode assembly fouling situation.
Owing to formed the enough little but fixed space that can contact between the electrode assembly of electrolyte solution concentration measurer of the present invention and the tabular barricade with solution, feasible measurement got rid of owing to electrode assembly produce near the container of electrolyte solution measuring error needle electrode intrinsic disadvantage, make the voltage of electrode assembly output only relevant, thereby improved precision and the reliability measured with the concentration and the temperature of survey solution.Make electrolyte solution concentration measurer of the present invention in 10～80 ℃ of scopes, to implement temperature compensation, can accurately measure the concentration of the electrolyte solution in 0～25% (weight) scope.In addition, measure, make the signal can be, thereby can realize automatically, follow-on test fully by Computer Processing because measuring circuit is designed to full voltage, and can the monitoring electrode device whether fouling.
The accompanying drawing summary
Introduce embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the general illustration of an embodiment of electrolyte solution concentration measurer of the present invention;
Fig. 2 is the structural representation of the electrode assembly of electrolyte solution concentration measurer of the present invention.
The concrete mode that carries out an invention
With reference to Fig. 1, electrolyte solution concentration measurer of the present invention comprises a signal source 1, interchange that it sends or pulse voltage signal V are applied on the outermost tubular electrode 2 and the most inboard tubular electrode 5 of the electrode assembly 15 that places the electrolyte solution of surveying through a resistance 8 of connecting with it, like this, between the middle tubular electrode 3 and 4 of electrode assembly 15 with regard to energy measurement to a voltage signal V
1Certainly, interchange or pulse voltage signal V can be applied on the electrode assembly 15 by any two tubular electrodes of electrode assembly 15, and two other tubular electrode is used for output voltage signal V
1Survey the temperature sensor 7 of electrolyte solution by placing, can obtain the voltage signal V of an expression electrolyte solution temperature of surveying
tTemperature sensor 7 can adopt thermopair, thermal resistance or semiconductor thermometer.Voltage signal V with electrode assembly 15 outputs
1, temperature sensor 7 output voltage signal V
tVoltage signal V with resistance 8 two ends
2Send into computing machine 11 by A/D converter 10.The interchange or the pulse voltage signal V of signal source 1 output can be the interchange or the pulse signal of 50～10000Hz, 0.01～10 volt of arbitrary shape.The intensity of signal is principle so that tangible solution electrode chemical reaction not to take place.In a distance, bottom side of leaving electrode assembly 15 a tabular barricade 12 is set, form the enough little but fixed space that can fully contact between the two, and the area of tabular barricade 12 is not less than the axial projective area of described electrode assembly 15 with solution.In the present embodiment, the distance between the bottom side of tabular barricade 12 and electrode assembly 15 is 8mm.
Fig. 2 shows the concrete structure synoptic diagram of the electrode assembly 15 of electrolyte solution concentration measurer of the present invention.Electrode assembly 15 is by four reducing tubular electrodes 2 of coaxial arrangement, 3,4,5 form, described tubular electrode 2,3,4,5 preferred design become cylindric, the diameter of outermost tubular electrode 2 for example is 12mm, the diameter of the most inboard tubular electrode 5 for example is 1mm, and two tubular electrodes 3 that mediate and 4 are configuration equidistantly, and the height that electrode assembly 15 exposes the liquid level of the electrolyte solution of surveying for example is 2mm.Each tubular electrode 2,3,4,5 is made by corrosion resistant metal material such as gold-plated iron plate, therebetween with for example epoxy resin filling and fixing of insulating resin heat-resisting, corrosion resistance.
It can also be seen that from Fig. 2, be provided with a tubular guarded electrode 16 that metal and described electrode assembly is coaxial in the periphery of described electrode assembly 15, itself and tubular electrode 2,3,4,5 insulation and with described tabular barricade 12 ground connection together.Like this, can prevent the influence of extraneous signal to the output signal of electrode assembly 15.
In addition, temperature sensor 7 can be arranged on the same plane of electrode assembly 15 bottoms.
During measurement, electrode assembly 15 and temperature sensor 7 are put into electrolyte solution, apply an interchange or pulse voltage signal V by signal source 1 to the input end of electrode assembly 15, then one of output exchanges or pulse voltage V on the output terminal of electrode assembly 15
1, its waveform is identical with interchange or pulse voltage signal V, but its size with exchange or frequency, the intensity of pulse voltage signal V, electrode 2,3, kind, temperature and the concentration of 4,5 shape, size and the solution of surveying are relevant.When frequency, the intensity of interchange or pulse voltage signal V, kind one timing of the shape of tubular electrode, size and the electrolyte solution of surveying, the alternating voltage V of electrode assembly 15 outputs
1Only relevant with the temperature and the concentration of electrolyte solution.As long as draw interchange or pulse voltage V by calibrating in advance
1, the funtcional relationship C=f (V between electrolyte solution temperature and the concentration
1, V
t), just can calculate the concentration of electrolyte solution.The mode that embodies of this funtcional relationship has multiple, and formula (1) is wherein a kind of.
C＝αV
1 a.V
t b (1)
In the formula, α, a and b are coefficient, and the interchange of its size and the kind of electrolyte solution, electrode shape, size and electrode assembly 15 inputs or the frequency of pulse voltage are relevant, can also respectively it be obtained with the mathematical regression method by certificate test.The inductive method of formula (1) is mathematics circle and engineering circle method commonly used.Inductive method also has many kinds, and wherein the most frequently used method has least square method.
Factor alpha, a and b that will obtain by calibrating and funtcional relationship be formula (1) input computing machine 11 for example, and then computing machine 11 can utilize the voltage signal V of electrode assembly 15 outputs
1Voltage signal V with temperature sensor 7 outputs
tJust can calculate the concentration of the electrolyte solution of surveying automatically, continuously.In addition, can also utilize the voltage signal V at resistance 8 two ends
2Understand variation, thereby whether fouling of monitoring electrode device 15 can be given the alarm in case of necessity automatically by computing machine by the electric current of electrolyte solution.
Claims (9)
1. an electrolyte solution concentration measurer is characterized in that, comprising:
Signal source (1) is used to produce one and exchanges or pulse voltage signal (V);
Electrode assembly (15), four reducing tubular electrodes (2 by coaxial arrangement, 3,4,5) form, described tubular electrode (2,3,4,5) make by corrosion resistant metal material, therebetween with heat-resisting, corrosion resistance insulating resin filling and fixing, draw the input end of described electrode assembly (15) from two tubular electrodes (2,5) wherein, be connected with two output terminals of described signal source (1) respectively, draw the output terminal of described electrode assembly (15) from two other tubular electrode (3,4), export one and exchange or pulse voltage (V
1);
Tabular barricade (12), the bottom side of itself and described electrode assembly (15) maintains a certain distance, and its area is not less than the axial projective area of described electrode assembly (15);
Temperature sensor (7) is used to export the voltage signal (V that represents described electrolyte solution temperature
t);
Can utilize following funtcional relationship to obtain the concentration of described electrolyte solution:
C＝f(V
1，V
t)
In the formula, C represents the concentration of described electrolyte solution, V
tBe the voltage of the described electrolyte solution temperature of expression, V
1Interchange or the pulse voltage of representing described electrode assembly (15) output, f representative function relation.
2. electrolyte solution concentration measurer as claimed in claim 1, it is characterized in that, periphery at described electrode assembly is provided with the coaxial tubular guarded electrode (16) of a metal and described electrode assembly (15), itself and tubular electrode (2,3,4,5) insulation and with described tabular barricade (12) ground connection together.
3. electrolyte solution concentration measurer as claimed in claim 2 is characterized in that, also is connected in series with a resistance (8) in the loop that described signal source (1) and described tubular electrode (2,5) are formed, by measuring the voltage (V at described resistance (8) two ends
2) can calculate electric current by described electrolyte solution, thus judge the whether fouling of described electrode assembly.
4. electrolyte solution concentration measurer as claimed in claim 3 is characterized in that it also comprises:
An A/D converter (10), it accepts the voltage signal (V of the described electrolyte solution temperature of expression of described temperature sensor (7) output
t), the interchange or the pulse voltage (V of described electrode assembly (15) output
1) and the voltage (V at described resistance (8) two ends
2), carry out analog to digital conversion;
A computing machine (11) is used to accept the output of described A/D converter (10), realize to the concentration of described electrolyte solution measure automatically and continuously and to the supervision of described electrode assembly fouling situation.
5. as each described electrolyte solution concentration measurer among the claim 1-4, it is characterized in that being shaped as of described tubular electrode (2,3,4,5) is cylindric.
6. as each described electrolyte solution concentration measurer among the claim 1-4, it is characterized in that the equidistant configuration of described tubular electrode (2,3,4,5).
7. as each described electrolyte solution concentration measurer among the claim 1-4, it is characterized in that described tubular electrode (2,3,4,5) is made by gold-plated iron plate.
8. as each described electrolyte solution concentration measurer among the claim 1-4, it is characterized in that described tabular barricade (12) is parallel to the bottom configuration of described electrode assembly (15).
9. as each described electrolyte solution concentration measurer among the claim 1-4, it is characterized in that, form the enough little but fixed space that can fully contact between described tabular barricade (12) and described electrode assembly (15) bottom with described electrolyte solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981060773A CN1163745C (en) | 1998-03-09 | 1998-03-09 | Electrolyte solution concentration measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981060773A CN1163745C (en) | 1998-03-09 | 1998-03-09 | Electrolyte solution concentration measurer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1211733A CN1211733A (en) | 1999-03-24 |
| CN1163745C true CN1163745C (en) | 2004-08-25 |
Family
ID=5218880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981060773A Expired - Fee Related CN1163745C (en) | 1998-03-09 | 1998-03-09 | Electrolyte solution concentration measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1163745C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048219A (en) * | 2012-12-05 | 2013-04-17 | 清华大学 | Analytical method of iodine-containing hydriodic acid concentration |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO324587B1 (en) * | 2006-03-15 | 2007-11-26 | Advanced Hydrocarbon Mapping A | Electric field sensor for marine environment |
| CN101398400B (en) * | 2007-09-28 | 2011-11-09 | 中国核动力研究设计院 | Conductivity electrode flowing and mixing measuring systems |
| CN106017571A (en) * | 2016-07-15 | 2016-10-12 | 重庆大学 | Electrolytic cell measuring robot system |
| CN108802104A (en) * | 2017-04-27 | 2018-11-13 | 东莞市盛山电子科技有限公司 | Easy-to-use type high-precision high range conductance salinity measurement equipment |
| CN110332685B (en) * | 2019-06-27 | 2021-05-18 | 郑州商学院 | Method and device for controlling humidifying equipment and air conditioner indoor unit |
-
1998
- 1998-03-09 CN CNB981060773A patent/CN1163745C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048219A (en) * | 2012-12-05 | 2013-04-17 | 清华大学 | Analytical method of iodine-containing hydriodic acid concentration |
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| Publication number | Publication date |
|---|---|
| CN1211733A (en) | 1999-03-24 |
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Applicant after: Kanayama Kimio Applicant after: Li Xiangyi Applicant after: Ma Changhong Applicant before: Kanayama Kimio Applicant before: Li Xiangyi |
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