Apparatus for determining the position of a object

Details Apparatus for determining the position of a object Apparatus for determining the position of a object

1975-09-04

1977-08-09

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

340 21, 340282, G01S 302, G08B 2100

Patent

active

040414957

ABSTRACT:
The position of an object which moves along a fixed path is determined by measuring the phase displacement of two signals received from demodulators connected to an aerial located along the path. A transmitter carried by the objects feeds signals to the demodulators and one of these sends a demodulated signal direct to a comparator while the other sends its signal to the comparator along the aerial.

REFERENCES:
patent: 1562485 (1925-11-01), Affel
patent: 3128070 (1964-04-01), Harris, Jr. et al.
patent: 3900878 (1975-08-01), Tsao

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