WO2003089949A3 - Distance measurement device with short distance optics - Google Patents

Distance measurement device with short distance optics Download PDF

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Publication number
WO2003089949A3
WO2003089949A3 PCT/US2003/011742 US0311742W WO03089949A3 WO 2003089949 A3 WO2003089949 A3 WO 2003089949A3 US 0311742 W US0311742 W US 0311742W WO 03089949 A3 WO03089949 A3 WO 03089949A3
Authority
WO
WIPO (PCT)
Prior art keywords
measurement device
pulses
waveform
feedback reference
reference pulses
Prior art date
Application number
PCT/US2003/011742
Other languages
French (fr)
Other versions
WO2003089949A2 (en
Inventor
Robert Lewis
Chad Thompson
George R Varian
Original Assignee
Toolz Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toolz Ltd filed Critical Toolz Ltd
Priority to AU2003228550A priority Critical patent/AU2003228550A1/en
Priority to EP03726308A priority patent/EP1499852A4/en
Publication of WO2003089949A2 publication Critical patent/WO2003089949A2/en
Publication of WO2003089949A3 publication Critical patent/WO2003089949A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/497—Means for monitoring or calibrating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/486—Receivers
    • G01S7/4868—Controlling received signal intensity or exposure of sensor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/486—Receivers
    • G01S7/487—Extracting wanted echo signals, e.g. pulse detection

Abstract

Technology is disclosed for measuring distances. A measurement device emits a beam (16) that reflects on the surface of an object (12). The measurement device determines the distance to the object, based on the time of flight of the beam from transmission to capture by the measurement device. The measurement device derives feedback reference pulses (40) from pulses in the emitted beam (46) and injects (34) them into the device's receive path - creating a receive waveform that includes one or more feedback reference pulses and corresponding pulses in the return beam. The device uses the pulses in the waveform to measure time of flight. The measurement device can attenuate (32) the feedback reference pulses to intensities similar or equal to the intensities of the return pulses. The measurement device can include a histogram processor (Fig. 7) that collects waveform samples at varying comparison thresholds. The device employs the most accurate information at each threshold to create a digitized composite waveform that corresponds to the analog waveform received by the measurement device. In some instances the measurement device can process the digitized waveform - removing noise, scaling reference pulses, and removing distortions cased by pulse trailing edges running into subsequent pulses.
PCT/US2003/011742 2002-04-15 2003-04-15 Distance measurement device with short distance optics WO2003089949A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003228550A AU2003228550A1 (en) 2002-04-15 2003-04-15 Distance measurement device with short distance optics
EP03726308A EP1499852A4 (en) 2002-04-15 2003-04-15 Distance measurement device with short distance optics

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37299202P 2002-04-15 2002-04-15
US60/372,992 2002-04-15

Publications (2)

Publication Number Publication Date
WO2003089949A2 WO2003089949A2 (en) 2003-10-30
WO2003089949A3 true WO2003089949A3 (en) 2004-01-22

Family

ID=29250942

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/US2003/011899 WO2003089950A2 (en) 2002-04-15 2003-04-15 Distance measurement device
PCT/US2003/011741 WO2003089948A2 (en) 2002-04-15 2003-04-15 Constructing a waveform from multiple threshold samples
PCT/US2003/011742 WO2003089949A2 (en) 2002-04-15 2003-04-15 Distance measurement device with short distance optics

Family Applications Before (2)

Application Number Title Priority Date Filing Date
PCT/US2003/011899 WO2003089950A2 (en) 2002-04-15 2003-04-15 Distance measurement device
PCT/US2003/011741 WO2003089948A2 (en) 2002-04-15 2003-04-15 Constructing a waveform from multiple threshold samples

Country Status (4)

Country Link
US (3) US7499150B2 (en)
EP (3) EP1499851A4 (en)
AU (3) AU2003225029A1 (en)
WO (3) WO2003089950A2 (en)

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EP1502224A4 (en) 2008-11-26
EP1502224A2 (en) 2005-02-02
US6950177B2 (en) 2005-09-27
AU2003228549A8 (en) 2003-11-03
US6829043B2 (en) 2004-12-07
US20040070745A1 (en) 2004-04-15
AU2003228550A8 (en) 2003-11-03
WO2003089950A3 (en) 2004-03-25
WO2003089950A2 (en) 2003-10-30
EP1499852A2 (en) 2005-01-26
WO2003089949A2 (en) 2003-10-30
WO2003089948A3 (en) 2004-01-15
AU2003228550A1 (en) 2003-11-03
US20040070746A1 (en) 2004-04-15
EP1499851A4 (en) 2008-11-19
AU2003228549A1 (en) 2003-11-03
EP1499852A4 (en) 2008-11-19
WO2003089948A2 (en) 2003-10-30
US20040075823A1 (en) 2004-04-22
AU2003225029A1 (en) 2003-11-03
US7499150B2 (en) 2009-03-03
EP1499851A2 (en) 2005-01-26
EP1502224B1 (en) 2012-11-21

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