| 摘要 |
<p>Device and method for controlling a heating element (20) of a glass-ceramic cookplate (10), having at least two conductive metal tracks (38,40), to achieve a selected temperature and to automatically determine the resistance of the glass-ceramic cookplate (10) between the tracks, or the resistance between two points spaced apart by a known length of one of the tracks, depending upon the value of the selected temperature by applying an AC voltage (54) to said tracks, when one desires to determine the resistance of the glass-ceramic cookplate (10), and to only one of the tracks (38, 40), when the track resistance is to be determined. The temperature of the cookplate (10) is computed from the value of the determined resistance and compared with the selected temperature to turn the heating element (20) on/off to achieve the selected temperature.</p> |
