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1. WO2020114769 - METHOD FOR DETERMINING THE DISTANCE AND REFLECTIVITY OF AN OBJECT SURFACE

Publication Number WO/2020/114769
Publication Date 11.06.2020
International Application No. PCT/EP2019/081885
International Filing Date 20.11.2019
IPC
G01S 7/481 2006.01
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/, G01S15/, G01S17/127
48of systems according to group G01S17/58
481Constructional features, e.g. arrangements of optical elements
G01S 7/4861 2020.01
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/, G01S15/, G01S17/127
48of systems according to group G01S17/58
483Details of pulse systems
486Receivers
4861Circuits for detection, sampling, integration or read-out
G01S 7/4865 2020.01
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/, G01S15/, G01S17/127
48of systems according to group G01S17/58
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 7/486 2020.01
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/, G01S15/, G01S17/127
48of systems according to group G01S17/58
483Details of pulse systems
486Receivers
G01S 7/487 2006.01
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/, G01S15/, G01S17/127
48of systems according to group G01S17/58
483Details of pulse systems
486Receivers
487Extracting wanted echo signals
G01S 17/10 2020.01
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
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 17/88
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
88Lidar systems specially adapted for specific applications
G01S 7/481
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
481Constructional features, e.g. arrangements of optical elements
G01S 7/4816
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
481Constructional features, e.g. arrangements of optical elements
4816of receivers alone
G01S 7/486
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
G01S 7/4861
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
4861Circuits for detection, sampling, integration or read-out
Applicants
  • OSRAM GMBH [DE]/[DE]
Inventors
  • ESCHEY, Michael
  • FERREIRA, Ricardo
  • GIANNANTONIO-TILLMANN, Jannis
Priority Data
10 2018 220 932.404.12.2018DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZUM BESTIMMEN DES ABSTANDS UND RÜCKSTRAHLVERMÖGENS EINER OBJEKTOBERFLÄCHE
(EN) METHOD FOR DETERMINING THE DISTANCE AND REFLECTIVITY OF AN OBJECT SURFACE
(FR) PROCÉDÉ PERMETTANT DE DÉTERMINER L'ÉLOIGNEMENT ET LE POUVOIR RÉFLÉCHISSANT D'UNE SURFACE D'UN OBJET
Abstract
(DE)
Ein Verfahren zum Bestimmen eines Abstands (d) und Rückstrahlvermögens einer Objektoberfläche (14) unter Verwendung einer Licht (12) mit einer Leistung emittierenden Laserquelle (10) und eines Detektors (16), der das von der Objektoberfläche (14) reflektierte oder zurückgestreute Licht (18) mit einer Bestrahlungsstärke erfasst und abhängig davon ein zeitabhängiges Spannungssignal ausgibt, umfasst: Einstellen (100, 110, 220, 230, 240) der Laserquelle(10), so dass dieser in wenigstens einem Puls Licht (12) mit einem vorbestimmten ersten Wert der Leistung emittiert, Einstellen (100, 110) des Detektors (16), so dass dieser abhängig von der Bestrahlungsstärke des erfassten, reflektierten oder zurückgestreuten Lichts (18) ein erstes Spannungssignal mit einem vorbestimmten zweiten Wert für einen Verstärkungsfaktor ausgibt, Bestimmen (120, 260) eines ersten Betrags für den Abstand der Objektoberfläche (14) aus einer dem ersten Spannungssignal zugeordneten und gemessenen Lichtlaufzeit (ToF), Anpassen (130, 150, 220) des ersten Werts der Leistung der Laserquelle (10) und/oder des zweiten Werts des Verstärkungsfaktors des Detektors (16) abhängig von dem bestimmten ersten Betrag für den Abstand (d), erneutes Emittieren (110, 240) von Licht (12) durch die Laserquelle (10) und Erfassen des reflektierten oder zurückgestreuten Lichts (18) durch den Detektor (16) sowie Ausgabe eines entsprechenden zweiten Spannungssignals unter Verwendung des angepassten ersten und/oder zweiten Werts, Bestimmen (120, 260) eines zweiten Betrags für den Abstand (d) der Objektoberfläche aus einer dem zweiten Spannungssignal zugeordneten und gemessenen Lichtlaufzeit (ToF).
(EN)
A method for determining a distance (d) and a reflectivity of an object surface (14) using a laser source (10) that emits light (12) at a certain power and using a detector (16) that detects a level of irradiance of light (18) reflected by or scattered back from the object surface (14) and that outputs a time-dependent voltage signal on the basis thereof comprises: setting (100, 110, 220, 230, 240) the laser source (10) so that the latter emits light (12) at a specified first value of power in at least one pulse, setting (100, 110) the detector (16) so that the latter outputs a first voltage signal with a specified second value for a gain factor on the basis of the level of irradiance of the detected reflected or back-scattered light (18), determining (120, 260) a first value for the distance of the object surface (14) from a measured light time-of-flight (ToF) assigned to the first voltage signal, adapting (130, 150 220) the first value of the power of the laser source (10) and/or the second value of the gain factor of the detector (16) on the basis of the determined first value for the distance (d), emitting (110, 240) light (12) again using the laser source (10) and detecting the reflected or back-scattered light (18) by the detector (16) and outputting a corresponding second voltage signal using the adapted first and/or second value, determining (120, 260) a second value for the distance (d) of the object surface from a measured light time-of-flight (ToF) assigned to the second voltage signal.
(FR)
L'invention concerne un procédé permettant de déterminer un éloignement (d) et un pouvoir réfléchissant d'une surface (14) d'un objet au moyen d'une source laser (10) émettant une lumière (12) à une puissance, et d'un détecteur (16) qui détecte à une intensité de rayonnement la lumière (18) réfléchie ou rétrodiffusée par la surface (14) de l'objet et émet en fonction un signal de tension fonction du temps. Le procédé comprend les étapes suivantes : positionnement (100, 110, 220, 230, 240) de la source laser (10) de telle manière qu'elle émet en au moins une impulsion de la lumière (12) présentant une première valeur de puissance prédéfinie, positionnement (100, 110) du détecteur (16) de telle manière qu'il émet en fonction de l'intensité de rayonnement de la lumière (18) détectée, réfléchie ou rétrodiffusée un premier signal de tension présentant une seconde valeur prédéfinie d'un facteur d'amplification, détermination (120, 260) d'un premier degré d'éloignement de la surface (14) de l'objet à partir d'un temps de vol (ToF) associé au premier signal de tension et mesuré, adaptation (130, 150, 220) de la première valeur de la puissance de la source laser (10) et/ou de la seconde valeur du facteur d'amplification du détecteur (16) en fonction du premier degré d'éloignement (d) déterminé, nouvelle émission (110, 240) de lumière (12) par la source laser (10) et détection par le détecteur (16) de la lumière (18) réfléchie ou rétrodiffusée, et émission d'un second signal de tension correspondant au moyen de la première et/ou de la seconde valeur adaptée, et détermination (120, 260) d'un second degré d'éloignement (d) de la surface de l'objet à partir d'un temps de vol (ToF) associé au second signal de tension et mesuré.
Also published as
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