CN108169565A - A kind of non-linear temperature compensation method for conductivity measurement - Google Patents
A kind of non-linear temperature compensation method for conductivity measurement Download PDFInfo
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- CN108169565A CN108169565A CN201711411820.XA CN201711411820A CN108169565A CN 108169565 A CN108169565 A CN 108169565A CN 201711411820 A CN201711411820 A CN 201711411820A CN 108169565 A CN108169565 A CN 108169565A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/44—Modifications of instruments for temperature compensation
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Abstract
The invention discloses a kind of non-linear temperature compensation methods for conductivity measurement, include the following steps：1) the temperature compensation coefficient F (x of standard sample at multiple non-25 DEG C are obtained, y), conductivity x and temperature y, temperature compensation coefficient F (x, y), conductivity x and the temperature y of standard sample at multiple non-25 DEG C acquired are obtained to the value of fitting coefficient again；2) the temperature information t and conductivity information K (t) of current sample to be tested are obtained, the temperature compensation coefficient σ of sample to be tested is obtained further according to the temperature information t and conductivity information K (t) of current sample to be tested；3) the conductivity value K (25) of sample to be tested when temperature information t, the conductivity information K (t) of the current sample to be tested obtained according to step 2) and temperature compensation coefficient σ calculate 25 °, complete the non-linear temperature compensation of conductivity measurement, this method can carry out non-linear temperature compensation to the conductivity of measurement, can effectively avoid the problem that measurement temperature departure fiducial temperature is larger.
Description
Technical field
The invention belongs to non-linear temperature compensation fields, are related to a kind of non-linear temperature compensation side for conductivity measurement
Method.
Background technology
In the factor for influencing conductivity measurement, temperature directly affects the conductive capability of solution, and the conductivity of solution can be with
Significant change occurs for the variation for temperature.Degree of ionization, solubility, the Ion transfer that measurement temperature directly affects solution are fast
Rate etc..Usually using 25 DEG C of fiducial temperatures as conductivity measurement, when solution temperature is not fiducial temperature it is necessary to carrying out manually
Or automatic compensation, the conductivity value of temperature on the basis of conductivity is compensated.The conductivity of solution is in non-linear with solution temperature
Relationship, the solution under different temperatures have different temperature-conductivity variations curve.
Conductivity meter is in each field extensive use at present, and domestic conductivity manufacturer is to conductivity into trip temperature
All it is using linear temperature compensation method during compensation, domestic conductivity table is caused to measure the larger situation of temperature departure fiducial temperature
It is lower to measure inaccuracy, non-linear temperature compensation how is carried out to the conductivity of measurement and calculates the domestic report of people not yet or applies,
Therefore a kind of non-linear temperature compensation computational methods suitable for conductivity measurement are studied to be of great significance.
Invention content
The shortcomings that it is an object of the invention to overcome the above-mentioned prior art, provides a kind of for the non-thread of conductivity measurement
Property temperature-compensation method, this method can to the conductivity of measurement carry out non-linear temperature compensation, can effectively avoid measuring
The problem of temperature departure fiducial temperature is larger.
In order to achieve the above objectives, the non-linear temperature compensation method of the present invention for conductivity measurement includes following
Step：
1) temperature compensation coefficient F (x, y), conductivity x and the temperature y of standard sample at multiple non-25 DEG C are obtained, then will be obtained
Temperature compensation coefficient F (x, y), conductivity x and the temperature y of standard sample substitute into formula (1) respectively at multiple non-25 DEG C obtained
In；
Obtain C, a1, a2……a14Value；
2) the temperature information t and conductivity information K (t) of current sample to be tested, then the temperature by current sample to be tested are obtained
Information t and conductivity information K (t) are substituted into formula (2), obtain the temperature compensation coefficient σ of sample to be tested, wherein,
3) temperature information t, the conductivity information K (t) of the current sample to be tested obtained according to step 2) and temperature-compensating system
The conductivity value K (25) of sample to be tested when number σ calculates 25 ° completes the non-linear temperature compensation of conductivity measurement.
The concrete operations of step 2) are：The temperature information t of current sample to be tested is detected by temperature sensor, is passed through simultaneously
Conductivity sensor detects the conductivity information K (t) of current sample to be tested, and microprocessor is by the temperature information of current sample to be tested
T and conductivity information K (t) is substituted into formula (2), obtains the temperature compensation coefficient σ of sample to be tested.
Temperature information t, conductivity information K (t) and the temperature of the current sample to be tested obtained in step 3) according to step 2)
Penalty coefficient σ calculate 25 ° when sample to be tested conductivity value K (25), wherein,
K (25)=K (t) σ (25-t)+K (t) (3)
The invention has the advantages that：
Non-linear temperature compensation method of the present invention for conductivity measurement first passes through non-25 in concrete operations
The temperature compensation coefficient F (x, y) of standard sample, conductivity x and temperature y calculate temperature compensation coefficient and temperature information and electricity at DEG C
Coefficient in conductance information fit correlation formula, then will actually measure obtained temperature information and conductivity information substitutes into temperature and mends
Coefficient and temperature information and conductivity information fit correlation formula are repaid, obtains the temperature compensation coefficient of sample to be tested, last basis is treated
The temperature compensation coefficient and temperature information and conductivity information of test specimens calculate the actual conductivity of sample to be tested under the conditions of 25 DEG C
Information, it is simple, convenient, avoid the problem that linear temperature compensation brings deviation fiducial temperature larger.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
With reference to figure 1, the non-linear temperature compensation method of the present invention for conductivity measurement includes the following steps：
1) temperature compensation coefficient F (x, y), conductivity x and the temperature y of standard sample at multiple non-25 DEG C are obtained, then will be obtained
Temperature compensation coefficient F (x, y), conductivity x and the temperature y of standard sample substitute into formula (1) respectively at multiple non-25 DEG C obtained
In,
Obtain C, a1, a2……a14Value；
2) the temperature information t and conductivity information K (t) of current sample to be tested, then the temperature by current sample to be tested are obtained
Information t and conductivity information K (t) are substituted into formula (2), obtain the temperature compensation coefficient σ of sample to be tested, wherein,
3) temperature information t, the conductivity information K (t) of the current sample to be tested obtained according to step 2) and temperature-compensating system
The conductivity value K (25) of sample to be tested when number σ calculates 25 ° completes the non-linear temperature compensation of conductivity measurement.
The concrete operations of step 2) are：The temperature information t of current sample to be tested is detected by temperature sensor, is passed through simultaneously
Conductivity sensor detects the conductivity information K (t) of current sample to be tested, and microprocessor is by the temperature information of current sample to be tested
T and conductivity information K (t) is substituted into formula (2), obtains the temperature compensation coefficient σ of sample to be tested.
Temperature information t, conductivity information K (t) and the temperature of the current sample to be tested obtained in step 3) according to step 2)
Penalty coefficient σ calculate 25 ° when sample to be tested conductivity value K (25), wherein,
K (25)=K (t) σ (25-t)+K (t) (3)
Table 1 is the present invention according to the temperature-compensating conductivity value that actual measurement conductivity and temperature calculate and standard scale conductivity
The comparable situation of value.
1 non-linear temperature compensation method of table and standard scale comparison result
Claims (3)
1. a kind of non-linear temperature compensation method for conductivity measurement, which is characterized in that include the following steps：
1) temperature compensation coefficient F (x, y), conductivity x and the temperature y of standard sample at multiple non-25 DEG C are obtained, then will be obtained
Temperature compensation coefficient F (x, y), conductivity x and the temperature y of standard sample are substituted into respectively in formula (1) at multiple non-25 DEG C arrived,
Obtain C, a1, a2……a14Value；
2) the temperature information t and conductivity information K (t) of current sample to be tested, then the temperature information t by current sample to be tested are obtained
And conductivity information K (t) is substituted into formula (2), obtains the temperature compensation coefficient σ of sample to be tested, wherein,
3) temperature information t, the conductivity information K (t) of the current sample to be tested obtained according to step 2) and temperature compensation coefficient σ meters
The conductivity value K (25) of sample to be tested when calculating 25 ° completes the non-linear temperature compensation of conductivity measurement.
2. the non-linear temperature compensation method according to claim 1 for conductivity measurement, which is characterized in that step 2)
Concrete operations be：The temperature information t of current sample to be tested is detected by temperature sensor, while is examined by conductivity sensor
Survey the conductivity information K (t) of current sample to be tested, microprocessor is by the temperature information t of current sample to be tested and conductivity information K
(t) it substitutes into formula (2), obtains the temperature compensation coefficient σ of sample to be tested.
3. the non-linear temperature compensation method according to claim 1 for conductivity measurement, which is characterized in that step 3)
Temperature information t, the conductivity information K (t) and temperature compensation coefficient σ of the middle current sample to be tested obtained according to step 2) are calculated
The conductivity value K (25) of sample to be tested at 25 °, wherein,
K (25)=K (t) σ (25-t)+K (t) (3).
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| CN112083133A (en) * | 2020-08-18 | 2020-12-15 | 惠州拓邦电气技术有限公司 | Nonlinear water solubility total solid compensation method and detection device |
| CN114428105A (en) * | 2021-12-16 | 2022-05-03 | 华能南京燃机发电有限公司 | Device and method for detecting multiple indexes of water vapor of gas turbine power station |
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| CN110739779A (en) * | 2019-10-24 | 2020-01-31 | 郑州轻工业学院 | method for researching influence of temperature on magnetic coupling resonance wireless power transmission efficiency |
| CN112083133A (en) * | 2020-08-18 | 2020-12-15 | 惠州拓邦电气技术有限公司 | Nonlinear water solubility total solid compensation method and detection device |
| CN114428105A (en) * | 2021-12-16 | 2022-05-03 | 华能南京燃机发电有限公司 | Device and method for detecting multiple indexes of water vapor of gas turbine power station |
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