| 摘要 |
The invention relates to a method for controlling a switch and in this method, the changing of prevailing light intensity is observed and the switch is controlled on the basis of the prevailing light intensity so that the switch is switched on when the light intensity falls below the set threshold value and then a load, for example an illuminator, is connected to a source of electricity and respectively, the switch is switched off when the light intensity exceeds the set threshold value and then the load is disconnected from the source of electricity. According to the invention, when a prominent and relatively stable change in the prevailing light intensity (A) is detected, this is interpreted as being morning and/or evening depending on the direction of the change; from these moments of changes in light intensities, the time of sunrise (ta) and/or respectively the time of sunset (tb) may be calculated; and according to the calculated time of sunrise and/or sunset, a clock is synchronized and by means of this clock, the daily timing of the switch is achieved as well as the control of the switching of the load, such as an illumintaor, connected via the switch to the source of electricity and off from it by following a desired program. |
