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1. WO2010093497 - METHOD AND APPARATUS FOR DISTANCE MEASUREMENT USING OPTICAL BEAM

Publication Number WO/2010/093497
Publication Date 19.08.2010
International Application No. PCT/US2010/021212
International Filing Date 15.01.2010
IPC
G01C 3/08 2006.01
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
3Measuring distances in line of sight; Optical rangefinders
02Details
06Use of electric means to obtain final indication
08Use of electric radiation detectors
CPC
G01S 17/10
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
06Systems determining position data of a target
08for measuring distance only
10using transmission of interrupted, pulse-modulated waves
G01S 7/4865
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
483Details of pulse systems
486Receivers
4865Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak
G01S 7/497
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
497Means for monitoring or calibrating
Applicants
  • WELLAND, Robert [US]/[US]
  • WILLMAN, Bryan, M. [US]/[US]
Inventors
  • WELLAND, Robert
  • WILLMAN, Bryan, M.
Agents
  • WU, James, M.
Priority Data
12/371,33213.02.2009US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND APPARATUS FOR DISTANCE MEASUREMENT USING OPTICAL BEAM
(FR) PROCEDE ET APPAREIL DE MESURE DE DISTANCE AU MOYEN D'UN FAISCEAU OPTIQUE
Abstract
(EN)
A method and apparatus for measuring a distance are disclosed. A measuring device includes a timer, a counter, an optical emitter, an optical receiver, and a distance computing element. In one embodiment, the timer provides a sequence of signals and the counter counts pulses in a loop. The loop includes an electrical path and an optical path. While an optical emitter such as a laser can emit outgoing beams, an optical receiver such as a photodiode receives return beams from the reflective surface. The reflective surface reflects the return beam in accordance with the outgoing beam. The distance computing element measures a distance in response to the outgoing and return beams.
(FR)
L'invention concerne un procédé et un appareil servant à mesurer une distance. Un dispositif de mesure comprend une minuterie, un compteur, un émetteur optique, un récepteur optique et un élément de calcul de distance. Dans un mode de réalisation, la minuterie fournit une séquence de signaux et le compteur compte les impulsions dans une boucle. La boucle comprend un trajet électrique et un trajet optique. Un émetteur optique, tel qu'un laser, peut émettre des faisceaux sortants et un récepteur optique, tel qu'une photodiode, reçoit des faisceaux de retour provenant de la surface réfléchissante. La surface réfléchissante réfléchit le faisceau de retour en fonction du faisceau sortant. L'élément de calcul de distance mesure une distance en réponse aux faisceaux sortant et de retour.
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