Acoustic bus passenger counter

Details Acoustic bus passenger counter Acoustic bus passenger counter

1975-03-31

1976-12-14

Farley, Richard A.

Communications: electrical

Selective

340 1C, 340 3FM, 340 3D, G01S 966

Patent

active

039978664

ABSTRACT:
A system for detecting and counting entry and exit of passengers. Transmitted high frequency sound beams define at least two zones through which passengers pass in sequence when entering or leaving a vehicle; the motion of a passenger through the zones produces signals at a receiver which are fed to logic circuits to produce appropriate counts. The logic circuits discriminate between moving human targets and other moving objects within the zones, and include range discrimination to prevent interference from outside the detection area. In one embodiment the sensor is located above the entry area to detect passengers' heads, while another embodiment is located at a level to detect passenger foot motion.

REFERENCES:
patent: 3097295 (1963-07-01), Williams
patent: 3109157 (1963-10-01), Bolton
patent: 3172075 (1965-03-01), Kay
patent: 3321737 (1967-05-01), Russell
patent: 3742434 (1973-06-01), Leyde et al.

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