| 摘要 |
PROBLEM TO BE SOLVED: To allow a lodges to return a product after taking it out to examine closely and to prevent being charged unfairly by continuously reading infrared and magnetic sensors at each tray. SOLUTION: A tray can store the bottles of mineral water and champagne horizontally and detects the existence of articles at every place by infrared beams. A cork 15 attached to the neck 13 of a champagne bottle is held by a ferromagnetic wire 16 that can be detected by a system. The cores of two wire coils are formed at a part located in the neighborhood of the neck of a mineral water or champagne bottle and when the cork 15 of the champagne bottle having the wire 16 is arranged at a recess 14 in biasing one of the coils, a small current is induced to the other coil. Then, a read signal is bigger in the case of the stored bottle of mineral water and is smaller in the case of the bottle of champagne. |
