Access alarming method and apparatus for working vehicle

Details Access alarming method and apparatus for working vehicle Access alarming method and apparatus for working vehicle

1988-07-05

1990-06-26

Tokar, Michael J.

Communications, electrical: acoustic wave systems and devices

Echo systems

Presence or movement only detection

340903, 340539, G01S 966

Patent

active

049377957

ABSTRACT:
An access alarming method and apparatus for activating an alarm in the event of the access of a working vehicle, such as a road roller, to an object, such as a worker, in the same working area as the vehicle. An ultrasonic wave transmitted by a transmitter on the object is received by a receiver on the vehicle. The received signal is processed and used to determine the relative position of the vehicle with respect to the object. An alarm is activated, and/or the vehicle is braked when it is judged that the object is within a hazard area determined in relation to the position and course of the vehicle.

REFERENCES:
patent: 3806861 (1974-04-01), Okumura et al.
patent: 3868573 (1975-02-01), Holcomb
patent: 3942601 (1976-03-01), Smith
patent: 3947832 (1976-03-01), Rosgen
patent: 4026654 (1977-05-01), Beaurian
patent: 4100529 (1978-07-01), Evans
patent: 4623032 (1986-11-01), Kemmer

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