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1. (WO2011076907) HIGHLY ACCURATE DISTANCE MEASUREMENT DEVICE
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2011/076907 International Application No.: PCT/EP2010/070604
Publication Date: 30.06.2011 International Filing Date: 22.12.2010
IPC:
G01S 7/487 (2006.01) ,G01S 17/10 (2006.01) ,G01S 17/36 (2006.01)
G PHYSICS
01
MEASURING; TESTING
S
RADIO 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
7
Details of systems according to groups G01S13/, G01S15/, G01S17/127
48
of systems according to group G01S17/58
483
Details of pulse systems
486
Receivers
487
Extracting wanted echo signals
G PHYSICS
01
MEASURING; TESTING
S
RADIO 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
17
Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02
Systems using the reflection of electromagnetic waves other than radio waves
06
Systems determining position data of a target
08
for measuring distance only
10
using transmission of interrupted pulse-modulated waves
G PHYSICS
01
MEASURING; TESTING
S
RADIO 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
17
Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02
Systems using the reflection of electromagnetic waves other than radio waves
06
Systems determining position data of a target
08
for measuring distance only
32
using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves
36
with phase comparison between the received signal and the contemporaneously transmitted signal
Applicants:
STUTZ, Reto [CH/CH]; CH (UsOnly)
FRITSCH, Robert [DE/CH]; CH (UsOnly)
HINDERLING, Jürg [CH/CH]; CH (UsOnly)
ROHNER, Marcel [CH/CH]; CH (UsOnly)
LEICA GEOSYSTEMS AG [CH/CH]; Heinrich-Wild-Strasse CH-9435 Heerbrugg, CH (AllExceptUS)
Inventors:
STUTZ, Reto; CH
FRITSCH, Robert; CH
HINDERLING, Jürg; CH
ROHNER, Marcel; CH
Agent:
KAMINSKI HARMANN PATENTANWÄLTE AG; Landstrasse 124 FL-9490 Vaduz, LI
Priority Data:
09180493.022.12.2009EP
Title (EN) HIGHLY ACCURATE DISTANCE MEASUREMENT DEVICE
(FR) DISPOSITIF DE MESURE TRÈS PRÉCISE D'UNE DISTANCE
Abstract:
(EN) Highly accurate electro-optical time of flight distance measuring device for determining a distance to a target. It is comprising at least a transmitter for sending out a pulse shaped optical radiation to the target, in particular as a pulse modulated laser beam from a laser diode, as well as a receiver for an optical signal, which signal is comprising parts of the optical radiation scattered back from the target, built for turning the optical signal to an electrical signal, in particular as a photodiode or avalanche photodiode, and a filter with a transfer-function for filtering the electrical signal, in particular an analog lowpass or bandpass filter whereby the filter is built in such a way that its transfer-function is of at least 4th order, in particular 5th or 7th or higher order, so that aliasing is suppressed. Further a waveform-sampler, as an analog-to-digital- converter, for digitalizing the pulse shape from the filtered electrical signal as time- and value-quantized digital data, and a computation means for a numerical evaluation of the distance according to the pulse shape or a pulse shape representing numerical signature from the digital data, in particular with a resolution in time being orders of magnitude better than the time-quantisation interval of the waveform sampler is comprised.
(FR) L'invention concerne un dispositif de mesure électro-optique très précise d'une distance par temps de vol, qui permet de mesurer une distance en direction d'une cible. Le dispositif comprend au moins un émetteur pour envoyer vers la cible un rayonnement optique à conformation d'impulsions, en particulier sous la forme d'un faisceau laser modulé par des impulsions provenant d'une diode laser; et un récepteur de signal optique, ledit signal comprenant des parties du rayonnement optique diffusé en retour par la cible, le récepteur étant conçu pour transformer le signal optique en un signal électrique, en particulier comme une photodiode ou une photodiode à avalanche; et un filtre comportant une fonction de transfert pour filtrer le signal électrique, en particulier un filtre passe-bas ou passe-bande analogique conçu de sorte que ladite fonction de transfert est d'au moins du 4e ordre, en particulier du 5e ou du 7e ordre ou d'un ordre supérieur, afin de supprimer un repliement de fréquence. Le dispositif comprend en outre un échantillonneur de forme d'onde, tel qu'un convertisseur analogique-numérique, pour numériser la forme d'impulsion provenant du signal électrique filtré comme des données numériques quantifiées du point de vue temporel et de la valeur, et des moyens de calcul d'évaluation numérique de la distance selon la forme d'impulsion ou une forme d'impulsion représentant une signature numérique provenant des données numériques, en particulier avec une résolution dans le temps qui est décuplée de multiples fois par rapport à l'intervalle de quantification temporelle de l'échantillonneur de forme d'onde.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)