The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2003
Filed:
Oct. 19, 2001
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 3/08 ; B60T 7/16 ; G01R 2/902 ;
U.S. Cl.
CPC ...
G01C 3/08 ; B60T 7/16 ; G01R 2/902 ;
Abstract
In a distance measuring device, reflected pulsed light beams with respect to one transmitted light beam are amplified by plural amplifiers ( ) of different gains. The retroreflection times of the reflected pulsed light beams are detected by retroreflection time detectors ( ) respectively connected to the amplifiers. Based on outputs of the retroreflection time detectors, distance calculator ( ) judges the overlapping state of the reflected pulses and the power of reflection from first pulse widths of the reflected pulsed light beams, selects a distance calculating method in accordance with the state, and outputs distance measurement data of high reliability.