Railway switches and signals – Train-position indication – Miniature model
Patent
1986-10-24
1988-01-12
Dorner, Kenneth J.
Railway switches and signals
Train-position indication
Miniature model
104292, 246187B, B61L 1300
Patent
active
047186216
ABSTRACT:
An automatic transportation system comprises a track mounted on a floor, a carriage having a reaction plate movable along the track, and a plurality of stators mounted on the floor along the track. A linear induction motor (LIM) for propelling the carriage is formed by the reaction plate and one of the stators. The system further comprises a detector unit including a plate mounted on the carriage and having a pair of parallel spaced first and second rows of slots, and at least one detector device disposed adjacent to one of the stators located at stations. The detector device comprises a pair of spaced first and second sensors for respectively detecting the first and second rows of slots to output a pair of pulse signals 90.degree. out of phase from each other when the carriage passes thereby. An F/V converter converts the pulse signals into a signal representative of the direction and speed of movement of the carriage. A controller is responsive to the output signal of the F/V converter to control the direction and magnitude of a traveling magnetic field generated by the stator to stop the carriage at the station.
REFERENCES:
patent: 2945167 (1960-07-01), Gunther
patent: 3117266 (1964-01-01), Raymond
patent: 3316392 (1967-04-01), Bailey et al.
patent: 3594572 (1971-07-01), Horeczky
patent: 4603640 (1986-08-01), Miller et al.
Horinouchi Arata
Iseki Tadao
Brittain James R.
Dorner Kenneth J.
Shinko Electric Co. Ltd.
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