Method for monitoring the location of monitored objects

Details Method for monitoring the location of monitored objects Method for monitoring the location of monitored objects

1978-08-31

1980-06-24

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

340346, 364449, G01S 302

Patent

active

042097878

ABSTRACT:
A method for monitoring the location of monitored objects within a monitored area wherein signpost units are positioned at the intersections of first and second coordinate grid lines and each signpost unit transmits a signpost code comprising a first portion corresponding to the first coordinate grid line and a second portion corresponding to the second coordinate grid line. The first coordinate grid lines are assigned numbers sequentially increasing in a first direction and the second coordinate grid lines are assigned numbers sequentially increasing in a second direction. The signpost unit output signals encoded with the signpost codes are received via vehicle units located in the monitored objects and the unique signpost codes are utilized to determine the location of the monitored object relative to one of the signpost units including the direction of the monitored object from the signpost unit.

REFERENCES:
patent: 3644883 (1972-02-01), Borman et al.

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