AU2001222082A1 - Optical distance measurement - Google Patents

Optical distance measurement

Info

Publication number
AU2001222082A1
AU2001222082A1 AU2001222082A AU2208201A AU2001222082A1 AU 2001222082 A1 AU2001222082 A1 AU 2001222082A1 AU 2001222082 A AU2001222082 A AU 2001222082A AU 2208201 A AU2208201 A AU 2208201A AU 2001222082 A1 AU2001222082 A1 AU 2001222082A1
Authority
AU
Australia
Prior art keywords
correlation
distance measurement
optical distance
signal
peak
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
AU2001222082A
Inventor
John Morcom
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Instro Precision Ltd
Original Assignee
INSTRO PREC Ltd
Instro Precision 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
Priority claimed from GB0001803A external-priority patent/GB0001803D0/en
Application filed by INSTRO PREC Ltd, Instro Precision Ltd filed Critical INSTRO PREC Ltd
Publication of AU2001222082A1 publication Critical patent/AU2001222082A1/en
Abandoned legal-status Critical Current

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
    • 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
    • G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated

Abstract

Optical distance equipment transmits an optical signal and determines distance by locating the peak of a correlation with the reflected signal. The number of calculations required for the correlation is greatly reduced by using a combination of a coarse and fine correlation. The accuracy of the distance measurement is also improved by calculating the point of intersection of two best fit lines to either side of the correlation peak. The signal is preferably modulated by a maximum length sequence.
AU2001222082A 2000-01-26 2000-12-21 Optical distance measurement Abandoned AU2001222082A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB0001803 2000-01-26
GB0001803A GB0001803D0 (en) 2000-01-26 2000-01-26 Time delay measurement
GB0005347 2000-03-06
GB0005347A GB0005347D0 (en) 2000-01-26 2000-03-06 Distance measurement
PCT/GB2000/004968 WO2001055746A1 (en) 2000-01-26 2000-12-21 Optical distance measurement

Publications (1)

Publication Number Publication Date
AU2001222082A1 true AU2001222082A1 (en) 2001-08-07

Family

ID=26243491

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001222082A Abandoned AU2001222082A1 (en) 2000-01-26 2000-12-21 Optical distance measurement

Country Status (8)

Country Link
US (1) US6753950B2 (en)
EP (1) EP1252535B1 (en)
JP (1) JP5138854B2 (en)
AT (1) ATE263380T1 (en)
AU (1) AU2001222082A1 (en)
DE (1) DE60009565T2 (en)
TR (1) TR200400946T4 (en)
WO (1) WO2001055746A1 (en)

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Also Published As

Publication number Publication date
US20030048430A1 (en) 2003-03-13
JP5138854B2 (en) 2013-02-06
DE60009565D1 (en) 2004-05-06
EP1252535A1 (en) 2002-10-30
EP1252535B1 (en) 2004-03-31
TR200400946T4 (en) 2004-08-23
US6753950B2 (en) 2004-06-22
JP2003521692A (en) 2003-07-15
WO2001055746A1 (en) 2001-08-02
ATE263380T1 (en) 2004-04-15
DE60009565T2 (en) 2005-02-24

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