| 摘要 |
<p>In order to safely determine the formation of ice or snow, there is provided a ballast resistance (2) connected to an electric current source and enabling to measure the heat absorption which strongly occurs due to the ice or the snow and to use it as an ice or snow formation signal. The reinforced heat abstraction at the ballast resistance (2) is determined by an ammeter (7) in order to identify a high power absorption or by a thermistor in heat conduction relationship with the ballast resistance and setting on or off the electric supply of the ballast resistance as a function of the temperature.</p> |
