Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Counting animate or inanimate entities
Patent
1983-03-14
1985-07-09
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Counting animate or inanimate entities
367108, G06M 127, G01S 966
Patent
active
045286795
ABSTRACT:
The invention is particularly useful for counting the passengers moving into and out of a common carrier vehicle such as a motor bus. Three ultrasonic ranging stations are provided to determine the presence and absence of passengers at three successive positions at the bus entrance. The three positions may correspond respectively to three steps through the entrance. Sequence logic circuitry is included for analyzing the sequence of detection of passengers at the three different ranging stations to establish a count of the number of passengers entering or leaving.
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Frielinghaus Klaus H.
Shahbaz Zalmai S.
General Signal Corporation
Heyman John S.
Kleinman Milton E.
Ohlandt John F.
Ohralik K.
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