High speed high resolution ultrasonic position and orientation t

Details High speed high resolution ultrasonic position and orientation t High speed high resolution ultrasonic position and orientation t

1994-06-29

1996-02-27

Voeltz, Emanuel T.

Boots, shoes, and leggings

364559, 367117, 367125, 34087041, G01S 1550

Patent

active

054954274

ABSTRACT:
An ultrasonic tracking system embodying the invention has an array of plural ultrasonic detectors at discrete locations, the plural detectors being responsive to an ultrasonic signal of frequency f emanating from a single remote transmitter to produce respective plural electronic signals corresponding to the ultrasonic signal as received at respective ones of the plural detectors, and a processor for determining from the plural electronic signals a direction of travel of the ultrasonic signal relative to the array of ultrasonic detectors. In order to provide range, a phase shift key encoder connected to the transmitter encodes every N cycles of the ultrasonic signal with one of a succession of encoder counts, while a phase shift key decoder coupled to receive an electronic signal from one of the plural detectors produces a new decoder count every N cycles of the electronic signal that are decodable. A range processor connected to the phase shift key encoder and to the phase shift key decoder receives simultaneously the encoder counts and the decoder counts. From the encoder and decoder counts, the range processor computes a distance between the transmitter and the one detector.

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