Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With time interval measuring means
Patent
1992-07-31
1994-01-18
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With time interval measuring means
367907, 367902, G01S 1500
Patent
active
052804577
ABSTRACT:
A detecting system and method of determining the position of a mobile point of interest in a m dimensional coordinate system having an ultrasonic transmitter mounted on the point of interest, and a plurality of stationary ultrasonic receivers, the number being at least m plus 2. The location of the receivers are determined optimally by using a linear matrix formulation. Alternatively, the location of the receivers can be determined during installation or self-calibration of the system. The system also includes receiver controlling means for processing the received signal to generate time of flight measurements which are used to eliminate the speed of sound as a variable and to compute the location of the point of interest. The controlling means also generates phase measurements when prompted by an outside source by comparing the transmitted signal with a 40kHz pulse sync to refine the accuracy of the location of the point of interest.
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Barbieri Enrique
Figueroa Jorge F.
Pihulic Daniel T.
The Administrators of the Tulane Educational Fund
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