Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1994-11-23
1996-01-16
Jordan, Charles T.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
G01S 1393
Patent
active
054851556
ABSTRACT:
First, a variable gain amplifier amplifies an output of a light-receiving element with the gain fixed at the maximum value and a laser diode is repeatedly actuated. Distance data obtained in each measurement is stored in a RAM. Second, the measurement is executed by varying the gain of the variable gain amplifier based on automatic gain control AGC technology. Meanwhile, a full gain distance calculation and a full gain relative speed calculation are carried out based on the distance data stored during the first step. Furthermore, in a third step, an AGC distance calculation and an AGC relative speed calculation are carried out based on the distance data stored during the second step. The full-gain based detection and the AGC based detection are alternately repeated, thereby accurately and reliably detecting a plurality of obstacles in a radar detection area.
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Jordan Charles T.
Nippondenso Co. Ltd.
Wesson Theresa M.
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