CN1203311C - Method of measuring solution electroconductivity - Google Patents
Method of measuring solution electroconductivity Download PDFInfo
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- CN1203311C CN1203311C CN 02111820 CN02111820A CN1203311C CN 1203311 C CN1203311 C CN 1203311C CN 02111820 CN02111820 CN 02111820 CN 02111820 A CN02111820 A CN 02111820A CN 1203311 C CN1203311 C CN 1203311C
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- value
- electric conductivity
- solution
- integral
- idt
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- Expired - Lifetime
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The present invention relates to a method for measuring the electric conductivity of solution, which comprises the following steps: the values of voltage and current are measured; a value having power is calculated, and W<having>=integral U*Idt; according to the relation of the value having power and a resistance component, the electric conductivity and the formula, the following calculating formula of the electric conductivity is obtained: G=C. integral I<2>dt/integral U*Idt, the value having power and the resistance component has the following relation: W<having>=R*integral I<2>dt, and the electric conductivity G=C/R; the values of the voltage and the current obtained by measurement are substituted into the following calculating formula: G=C. integral I<2>dt/integral U*Idt, and then the value of the electric conductivity can be obtained. Because the present invention adopts the technical scheme, the present invention avoids the influences of reactance components, such as sensor polarization, distributed capacitance, etc., on the measured electric conductivity, and in the technical scheme, the electric conductivity of the solution is indirectly calculated by measuring W<having> consumed by the solution. Therefore, the accurate measured value of the electric conductivity is obtained.
Description
Technical field
The present invention relates to a kind of measurement computing method of electrical conductivity of solution.
Background technology
At present the measuring method of electrical conductivity of solution generally be by measuring the solution two ends voltage U and by the solution electric current I, calculate the conductivity of solution with formula (1), promptly conductivity G is:
G＝C·I/U (1)
Wherein: C is an electrode constant.
This measurement computing method are subjected to the influence of reactive components such as sensor polarization and distributed capacitance bigger, make measuring result error bigger.
Summary of the invention
The object of the present invention is to provide a kind of sensor polarization, distributed capacitance can avoided to influence, obtain the conductivity measuring method of accurate electrical conductivity of solution value.
The measuring method of a kind of electrical conductivity of solution provided by the present invention comprises the following steps: measuring voltage and current value; Calculate meritorious value, that is: W
Have=∫ U * Idt; According to the relation of meritorious value with resistive component, that is: W
Have=R * ∫ I
2Dt again according to conductivity G=C/R, in conjunction with following formula, gets the calculating formula of conductivity, that is: G=C ∫ I
2Dt/ ∫ U * Idt; The voltage and current value substitution calculating formula G=C ∫ I that obtains will be measured
2Among dt/ ∫ U * Idt, can obtain conductivity value.
Owing to adopted above-mentioned technical solution, that is: by the meritorious W that measures solution consumption the conductivity of calculating solution is indirectly arranged, make the conductivity of measuring avoid the influence of reactive components such as sensor polarization and distributed capacitance, thereby obtain conductivity measurements accurately.
Embodiment
The present invention, promptly a kind of measuring method of electrical conductivity of solution comprises the following steps:
Measure the voltage and current value of solution;
Calculate meritorious value, that is:
W
Have=∫ U * Idt (2);
According to the relation of meritorious value with resistive component, that is: W
Have=R * ∫ I
2Dt again according to conductivity G=C/R, in conjunction with (2) formula, gets the calculating formula of conductivity, that is:
G＝C·∫I
2dt/∫U×Idt (3)；
With measuring voltage and current value substitution (3) formula that obtains, can obtain conductivity value.
Claims (1)
1. the measuring method of an electrical conductivity of solution is characterized in that, comprises the following steps:
Measure the voltage and current value of solution;
Calculate meritorious value, that is: W
Have=∫ U * Idt;
According to the relation of meritorious value with resistive component, that is: W
Have=R * ∫ I
2Dt again according to conductivity G=C/R, in conjunction with following formula, gets the calculating formula of conductivity, that is: G=C ∫ I
2Dt/ ∫ U * Idt;
The voltage and current value substitution calculating formula G=C ∫ I that obtains will be measured
2Among dt/ ∫ U * Idt, can obtain conductivity value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02111820 CN1203311C (en) | 2002-05-24 | 2002-05-24 | Method of measuring solution electroconductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02111820 CN1203311C (en) | 2002-05-24 | 2002-05-24 | Method of measuring solution electroconductivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1459629A CN1459629A (en) | 2003-12-03 |
| CN1203311C true CN1203311C (en) | 2005-05-25 |
Family
ID=29426393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02111820 Expired - Lifetime CN1203311C (en) | 2002-05-24 | 2002-05-24 | Method of measuring solution electroconductivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1203311C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100541208C (en) | 2006-08-30 | 2009-09-16 | 梅特勒-托利多仪器（上海）有限公司 | The measuring method of electrical conductivity of solution |
| FR2932893B1 (en) * | 2008-06-23 | 2010-12-10 | Millipore Corp | METHOD AND DEVICE FOR MEASURING THE CONDUCTIVITY OF A PURE OR ULTRAPUR LIQUID. |
| CN101726518B (en) * | 2009-12-24 | 2012-09-26 | 福建师范大学 | Method for measuring electrical conductivity of solution |
| CN102830142A (en) * | 2012-08-24 | 2012-12-19 | 福建师范大学 | Method and key circuit for measuring solution conductivity through triangular wave excitation |
| CN102830141B (en) * | 2012-08-24 | 2014-06-25 | 福建师范大学 | Method for measuring solution conductivity of closed decoupled capacitance-resistance network excited by triangular wave |
| CN102798763B (en) * | 2012-08-24 | 2014-10-15 | 福建师范大学 | Method for measuring conductivity of solution by adopting two waveform excitation signals |
| CN102809697B (en) * | 2012-08-24 | 2014-09-03 | 福建师范大学 | Solution conductivity measurement method for excitation of triangular wave and integrating treatment of response current |
| CN109142463A (en) * | 2018-10-09 | 2019-01-04 | 李晨天 | Transient DC method for measuring conductance and device |
-
2002
- 2002-05-24 CN CN 02111820 patent/CN1203311C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1459629A (en) | 2003-12-03 |
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Granted publication date: 20050525 |
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| CX01 | Expiry of patent term |