Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1994-09-29
1997-07-29
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
367127, 901 1, 901 47, G01S 302
Patent
active
056525931
ABSTRACT:
The disclosure involves a method for guiding a machine within an area. Such method includes the steps of triggering an acoustic locating signal from a stationary "beacon-type" base module to a receiver on the machine. The method is applicable for one-beacon, two-receiver and two-beacon, one-receiver applications. A related apparatus also includes a device for emitting a trigger signal and a device for determining the time elapsed between transmission and reception of the locating signal. An operating principle involves computing the module-to-machine distance by determining the "time of flight" of such signal. The machine is steered along a path, the locus of which is defined by an equation.
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Jacobs Stephen
Rench Quentin H.
Blum Theodore M.
Von Schrader Company
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