|発明の名称||TROLLEY WIRE FROSTING PREDICTION METHOD AND DEVICE|
PROBLEM TO BE SOLVED: To provide a trolley wire frosting prediction method and device, which accurately predicts the formation of frost, based on information by a weather forecast.
SOLUTION: The trolley wire frosting prediction method for predicting trolley wire frosting, based on the weather forecast, comprises: collecting weather forecast information on a trolley wire frosting prediction object area; using this weather forecast information to determine the weather forecast of the trolley wire frosting prediction object area on whether the predicted weather of the next morning is fine or cloudy, whether a predicted lowest temperature T2 is 0.5°C or lower and whether a predicted wind speed is 1 m/s or less; computing saturated water vapor pressure es1 at the temperature T1 of the evening; computing water vapor concentration a1, based on the saturated water vapor pressure es1 and the measured value of humidity; computing saturated waster vapor pressure es2 at a temperature (T2-3) obtained by subtracting 3°C from the predicted lowest temperature T2; computing saturated water vapor concentration a2, based on the saturated water vapor pressure es2; computing supersaturated water vapor concentration a1-a2; and reporting the formation of frost on a trolley wire when the value of the supersaturated water vapor concentration a1-a2 is positive.
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