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1. WO2020139380 - THREE-DIMENSIONAL LIGHT DETECTION AND RANGING SYSTEM USING HYBRID TDC AND ADC RECEIVER

Publication Number WO/2020/139380
Publication Date 02.07.2020
International Application No. PCT/US2018/067934
International Filing Date 28.12.2018
IPC
G01S 7/486 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
H03M 1/12 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
12Analogue/digital converters
G04F 10/00 2006.01
GPHYSICS
04HOROLOGY
FTIME-INTERVAL MEASURING
10Apparatus for measuring unknown time intervals by electric means
G01S 17/10 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
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 17/93 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
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
88Lidar systems, specially adapted for specific applications
93for anti-collision purposes
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 17/42
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
42Simultaneous measurement of distance and other co-ordinates
G01S 17/931
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
93for anti-collision purposes
931of land vehicles
G01S 7/4817
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
4817relating to scanning
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 7/4873
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
487Extracting wanted echo signals ; , e.g. pulse detection
4873by deriving and controlling a threshold value
Applicants
  • BEIJING VOYAGER TECHNOLOGY CO, LTD. [CN]/[CN]
Inventors
  • LU, Yue
  • CHU, Tao
Agents
  • EUREK, Justin
Priority Data
16/232,97326.12.2018US
16/232,97726.12.2018US
16/232,97926.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) THREE-DIMENSIONAL LIGHT DETECTION AND RANGING SYSTEM USING HYBRID TDC AND ADC RECEIVER
(FR) SYSTÈME DE DÉTECTION DE LUMIÈRE ET DE TÉLÉMÉTRIE TRIDIMENSIONNELLES UTILISANT UN RÉCEPTEUR HYBRIDE À TDC ET CAN
Abstract
(EN)
A method for operating a LiDAR system in an automobile that can include sending light pulses toward an object; receiving analog sensor data from an optical sensor measuring the light pulses reflected off the object; digitizing the analog sensor data using an analog to digital conversion system having a first sampling rate to generate a first set of processed sensor data and using a time to digital conversion system having a second sampling rate that is greater than the first sampling rate to generate a second set of processed sensor data; selecting the first set of processed sensor data when the analog sensor data is beneath a threshold signal to noise ratio; selecting the second set of processed sensor data when the analog sensor data exceeds the threshold signal to noise ratio; and calculating a range between the LiDAR system and the object by extracting time of flight data from the selected set of processed sensor data.
(FR)
L'invention concerne un procédé pour faire fonctionner un système LiDAR dans une automobile qui peut comprendre l'envoi d'impulsions lumineuses vers un objet; la réception de données de capteur analogique de la part d'un capteur optique qui mesure les impulsions lumineuses réfléchies par l'objet; la numérisation des données de capteur analogique en utilisant un système de conversion analogique-numérique ayant une première fréquence d'échantillonnage pour générer un premier ensemble de données de capteur traitées et en utilisant un système de conversion temps-numérique ayant une deuxième fréquence d'échantillonnage, qui est supérieure à la première fréquence d'échantillonnage, pour générer un deuxième ensemble de données de capteur traitées; la sélection du premier ensemble de données de capteur traitées lorsque les données de capteur analogique sont au-dessous d'un seuil de rapport signal-bruit; la sélection du deuxième ensemble de données de capteur traité lorsque les données de capteur analogique dépassent le seuil de rapport signal/bruit; et le calcul d'une portée entre le système LiDAR et l'objet par extraction de données de temps de vol de l'ensemble sélectionné de données de capteur traitées.
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