Distance measurement method and device

Details Distance measurement method and device Distance measurement method and device

2006-12-05

2006-12-05

Gregory, Bernarr E. (Department: 3662)

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

Determining distance

With frequency modulation

C342S070000, C342S118000, C342S128000, C342S129000, C342S130000, C342S175000, C342S176000, C342S179000, C342S195000, C342S196000

Reexamination Certificate

active

07145502

ABSTRACT:
A distance can be measured with high resolution. A frequency controller (7) controls a voltage control oscillator (2) so as to change a signal source frequency f in a range containing two center frequencies f1and f2and transmits it as a traveling wave from an antenna (4) to a target (5). A reflected wave reflected by the target (5) and the traveling wave interfere each other and form a standing wave. A power detector (6) detects power corresponding to the amplitude of the standing wave and performs Fourier transform based on the two center frequencies f1and f2in Fourier transform means (11, 12), respectively, thereby calculating radar image functions P1(x), P2(x). The distance d to the target (5) satisfies the conditions that the phase difference of the two radar image functions zero-crosses and the amplitude of the radar image functions becomes maximum. The zero cross point of the phase difference is a zero cross point of a linear function and can be identified with high resolution.

REFERENCES:
patent: 1993326 (1935-03-01), Hart
patent: 2011392 (1935-08-01), Bentley
patent: 2050418 (1936-08-01), Boerner
patent: 2151323 (1939-03-01), Hollmann
patent: 2222586 (1940-11-01), Sanders, Jr.
patent: 2222587 (1940-11-01), Sanders, Jr.
patent: 2248599 (1941-07-01), Alexanderson
patent: 2259982 (1941-10-01), Alexanderson et al.
patent: 6115651 (2000-09-01), Cruz
patent: 6795014 (2004-09-01), Cheong
patent: 6903677 (2005-06-01), Takashima et al.
patent: 2004/0119966 (2004-06-01), Iritani et al.
patent: 39-23284 (1964-10-01), None
patent: 59-142485 (1984-08-01), None
patent: 62-108176 (1987-05-01), None
patent: 3-144306 (1991-06-01), None
patent: 5-281341 (1993-10-01), None
patent: 10-239426 (1998-09-01), None
patent: 11-230734 (1999-08-01), None
patent: 2002-357656 (2002-12-01), None
patent: 99/13293 (1999-03-01), None

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