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Electrical conductivity is one of the necessary parameters of water quality detection in the seawater desalination. By analyzing the shortcomings of traditional measurement methods, an electrical conductivity measurement method based on the variable frequency excitation was proposed. The factors affecting measurement error such as temperature, electrode polarization and capacitance effect were analyzed...
The measuring of diameter parameters of wheel set is an important step for the safety of train vehicle running. The wear degree of wheel increases with the speedup of train. The paper introduced an online measuring method of diameter parameters of running wheel set based on optoelectronic detecting technique while the train is running in low-speed within 5–10km/h. The method used precision laser displacement...
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