Ultra high resolution ranging unit

Details Ultra high resolution ranging unit Ultra high resolution ranging unit

1997-09-11

1999-06-22

Sotomayor, John B.

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

Determining distance

Phase comparison

342129, 342135, 342103, G01S 1336

Patent

active

059146834

ABSTRACT:
A low cost, real time, remote sensor device for accurately measuring distance to an object with a resolution of 1 millimeter or better using phase information from either electromagnetic or acoustic energy. The device repetitiously transmits a swept frequency and decodes the resulting echo to produce a phase gate which is then converted to an accurate measurement of the range from each sweep. A method for measuring the time between two known phase points on a return signal is employed to determine the range measurement. Since the phase of the signal is used to determine range, the resolution is not dependent on bandwidth.

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