Systems for determining distances to and locations of features o

Details Systems for determining distances to and locations of features o Systems for determining distances to and locations of features o

1986-04-03

1987-10-27

Krass, Errol A.

Boots, shoes, and leggings

364449, 364460, 342451, 342458, 342463, G01C 1520, G01S 302

Patent

active

047034440

ABSTRACT:
A golfer wishing to know the distance to a specified feature on a golf course, operates a portable interrogation unit, to enter a request for the distance to the location of the feature. Transmitters located to define a triangle encompassing a substantial portion of the course transmit ranging signals, which are received by the portable interrogation unit. The portable interrogation unit includes a memory which stores the locations of the transmitters and the locations of predetermined features on the course and a CPU which processes the ranging signals received from the transmitters to determine the location of the portable interrogation unit and further to determine the distance from the portable unit to the specified feature. The portable interrogation unit then displays the determined distance. To survey the locations of the various predetermined features on the course, a portable survey unit is substituted for the portable interrogation unit. Feature identification data is entered and a CPU in the portable survey unit determines the location of the unit by processing the ranging signals and causes such location to be stored in an area of a memory therein that is addressed by the entered feature identification data. The stored feature locations then are transferred to the respective memories of a plurality of portable interrogation units.

REFERENCES:
patent: 3150372 (1959-06-01), Groth
patent: 3375520 (1968-03-01), De Groot et al.
patent: 4086630 (1978-04-01), Speiser et al.
patent: 4480310 (1984-10-01), Alvarez

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