Salinity measurement method

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

Active Publication Date: 2015-11-04
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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Embodiment Construction

[0029] In the process of specific realization, select several effective temperature points T 1 =25°C, T 2 =20℃、T 3 =10°C, T 4 =5°C, 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 , where the value range of the salt solution concentration is [0%, 21%]. The n salt solutions with different concentrations are placed at T 1 In the measurement, you can read n voltage values, which are V 1 , V 2 , V 3 ,...,V n ,As shown in Table 1.

[0030] Table 1, T 1 The measured voltage values ​​of different salt solutions at different temperatures

[0031]

[0032] The application steps are as follows:

[0033] a. Calculate the actual resistance value from the measured voltage value. Calculate the actual resistance value according to the formula (1) for the charge and discharge of the resistor and capacitor, as shown in Table 2, respectively R 1...

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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 the modern transportation industry, the impact of weather and road conditions on transportation is becoming more and more extensive. Poor road conditions seriously reduce the efficiency of road transportation and even threaten the safety of public life and property. Timely and accurate acquisition of road surface status information enables expressway staff to have a basis for the regulation of expressway traffic, effectively improving 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 deicing agents with sodium c...

Claims

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Application Information

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