Automatic light quantity adjusting device for beacon

Abstract

PURPOSE: To obtain the automatic light quantity adjusting device for a beacon, which can adjust automatically the light quantity of the beacon in accordance with brightness in the periphery and the kind of a transportation means moving body. CONSTITUTION: Based on an input signal from an illumination meter for detecting brightress in the periphery and an identification signal of a transportation means to be guided by a beacon 2, an optimal illuminance calculating means 5 calculates optimal illuminance of a lighting part 1 of the beacon 2. Subsequently, the optimal illuminance calculated by the optimal illuminance calculating means 5 and a light quantity signal of the present beacon 2 are compared by a comparator 7. and based on a result of this comparison, a light quantity correcting means 8 corrects the light quantity of the lighting part. COPYRIGHT: (C)1992,JPO&Japio

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