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A method for measuring salinity

A measurement method and salinity technology, applied in the direction of material resistance, can solve the problems of temperature drift, data calibration work increased workload, large error, etc., to reduce the influence of salinity measurement, fast calculation speed, and performance improvement.

Active Publication Date: 2017-07-28
SOUTHEAST UNIV
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Problems solved by technology

[0004] However, the actual salinity measurement value is significantly affected by the ambient temperature, resulting in temperature drift and large errors. At the same time, a large amount of data calibration work increases the workload

Method used

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  • A method for measuring salinity
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Embodiment Construction

[0030] In the process of specific implementation, select several effective temperature points T 1 =25℃, T 2 =20℃, T 3 =10℃, T 4 =5℃, T 5 =0°C, where the effective temperature range of the temperature range is [-40°C, 60°C], and then select n salt solutions S with different concentrations 1 , S 2 , S 3 , …, S n , and the range of the salt solution concentration is [0%, 21%]. The n salt solutions of different concentrations are placed at T 1 To measure in, you can read out n voltage values, which are V 1 , V 2 , V 3 , …, V n ,As shown in Table 1.

[0031] Table 1. T 1 Measured voltage values ​​of different salt solutions at different temperatures

[0032]

[0033] The application steps are as follows:

[0034] a. Calculate the actual resistance value from the measured voltage value. The actual resistance value is calculated according to the resistance-capacitor charge-discharge formula (1), as shown in Table 2, respectively R 1 , R 2 , R 3 , …, R n .

[0...

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Abstract

The invention discloses a salinity measurement method. The salinity measurement method specifically comprises the following steps: 1, solving the conductivity of a salt solution by calculation formulas of salinity temperature and conductivity when the salinity and the temperature are known; 2, substituting the solved conductivity into a calculation formula of a plane circular electrode model and establishing a relation between a sensor resistance and the salinity and temperature; 3, substituting an output voltage value of a sensor into a charging / discharging formula of a sensor resistance-capacitance network, and solving a resistance value of the other group of sensor; and 4, carrying out curve fitting to establish two groups of formulas of resistance values, which are obtained by calculation, and determining relative parameters, so as to establish a function relation of salinity, temperature and voltage. With the adoption of the salinity measurement method, the acquisition amount of calibrated data is extremely reduced through the plane circular electrode model which is established by salinity measurement, so that the calibration efficiency is improved, the calculation speed is accelerated and the influences of temperature effect are reduced, and furthermore, the salinity measurement accuracy is remarkably improved.

Description

technical field [0001] The realization method of salinity measurement belongs to the technical field of conductivity measurement, and is specifically used for the measurement of salinity data at different temperatures. Background technique [0002] With the rapid development of modern transportation industry, the influence of weather and road conditions on transportation is becoming more and more extensive. Bad road conditions seriously reduce the efficiency of road transportation, and even threaten the safety of life and property of the public. The timely and accurate acquisition of road surface status information enables expressway staff to have a basis for the regulation of expressway traffic, and effectively improves expressway traffic efficiency and safety. [0003] The salinity detection sensor is mainly used to detect the concentration of deicing agent and predict the freezing point in road conditions, and can be integrated into the road sensor. Since a large number ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/06
Inventor 韩磊殷刚毅周全刘佳杰
Owner SOUTHEAST UNIV
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