Follow-up system for moving bodies

Details Follow-up system for moving bodies Follow-up system for moving bodies

1987-11-17

1990-09-04

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

342457, G01S 302

Patent

active

049548360

ABSTRACT:
A system follows up or traces a moving body accompanied by a radio signal transmitter which constantly generates a radio signal of a predetermined frequency or is adapted to generate such a radio signal when the user manually operates the transmitter should an emergency arise. The system includes two different antenna networks, one comprising a plurality of non-directional antennae disposed substantially evenly over a specific area, always ready to receive the radio signal which will or may be transmitted from anywhere in the area, and the other comprising directional antennas mounted at several points in the area. In response to the radio signal being monitored by one or more of non-directional antennae, at least two of directional antennae come into operation and two different directions in which the respective directional antennae show the maximum field strength are detected with field strength meters attached thereto, which makes it possible to determine an exact position of the signal source or the moving body according to triangular surveying. A computer may be of help to the operation of the system.

REFERENCES:
patent: 4494119 (1985-01-01), Wimbush

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