WO2008024910A3 - Lidar-based level measurement - Google Patents

Lidar-based level measurement Download PDF

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Publication number
WO2008024910A3
WO2008024910A3 PCT/US2007/076638 US2007076638W WO2008024910A3 WO 2008024910 A3 WO2008024910 A3 WO 2008024910A3 US 2007076638 W US2007076638 W US 2007076638W WO 2008024910 A3 WO2008024910 A3 WO 2008024910A3
Authority
WO
WIPO (PCT)
Prior art keywords
liquid surface
flight
pulse
time
laser pulse
Prior art date
Application number
PCT/US2007/076638
Other languages
French (fr)
Other versions
WO2008024910A2 (en
Inventor
Sigifredo Nino
Andre Beaulieu
Jean-Louis Dumont
Ciero Bart Di
Ronald Fisher
Nathalie Marcotte
Sylvain Nadeau
Trevor Nowlan
Andre Raymond
Richard Steele
Original Assignee
Invensys Sys Inc
Sigifredo Nino
Andre Beaulieu
Jean-Louis Dumont
Ciero Bart Di
Ronald Fisher
Nathalie Marcotte
Sylvain Nadeau
Trevor Nowlan
Andre Raymond
Richard Steele
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 Invensys Sys Inc, Sigifredo Nino, Andre Beaulieu, Jean-Louis Dumont, Ciero Bart Di, Ronald Fisher, Nathalie Marcotte, Sylvain Nadeau, Trevor Nowlan, Andre Raymond, Richard Steele filed Critical Invensys Sys Inc
Publication of WO2008024910A2 publication Critical patent/WO2008024910A2/en
Publication of WO2008024910A3 publication Critical patent/WO2008024910A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
    • G01F23/2928—Light, e.g. infrared or ultraviolet for discrete levels using light reflected on the material surface

Abstract

A level meter for measuring a liquid surface level in a tank includes a housing that attaches to the tank, an optical source and an optical sensor in the housing that transmit a laser pulse toward the liquid surface and receive the reflected pulse. A signal processor calculates a raw distance to the liquid surface based on the time of flight of the laser pulse, performs a filter process on the raw data and outputs a measured distance between the optical sensor and the liquid surface. A method of measuring the liquid surface level includes transmitting a laser pulse toward the liquid surface, receiving the reflected pulse, determining the time of flight of the pulse, calculating a raw distance measurement based on the time of flight, performing a filter process on the raw data and outputting a measured distance to the liquid surface level.
PCT/US2007/076638 2006-08-25 2007-08-23 Lidar-based level measurement WO2008024910A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82362606P 2006-08-25 2006-08-25
US60/823,626 2006-08-25

Publications (2)

Publication Number Publication Date
WO2008024910A2 WO2008024910A2 (en) 2008-02-28
WO2008024910A3 true WO2008024910A3 (en) 2008-05-08

Family

ID=39107679

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/076638 WO2008024910A2 (en) 2006-08-25 2007-08-23 Lidar-based level measurement

Country Status (1)

Country Link
WO (1) WO2008024910A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE49950E1 (en) 2022-11-10 2024-04-30 Leddartech Inc. Distance detection method and system

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009121181A1 (en) 2008-04-04 2009-10-08 Leddartech Inc. Optical level measurement device and method
CN101285380B (en) * 2008-05-27 2012-12-19 张炳爱 Measuring method for water level of drilled shaft
US7635854B1 (en) 2008-07-09 2009-12-22 Institut National D'optique Method and apparatus for optical level sensing of agitated fluid surfaces
DE102012108462A1 (en) * 2012-09-11 2014-03-13 Endress + Hauser Gmbh + Co. Kg Method for laser-based determination of level of liquid filling material in container used in e.g. chemical industry, involves scanning reflected pulses received from surface of material, after emitting laser pulses toward material
DE102013101889A1 (en) * 2013-02-26 2014-08-28 Sick Ag Optoelectronic level sensor
US20160109277A1 (en) * 2014-10-17 2016-04-21 Elwin G. Hunt Optically-based method and system for measuring liquids in tanks
CN109073447B (en) * 2016-02-11 2020-12-01 乌比克瓦系统公司 Method and system for evaluating the amount of content stored within a container
IT201600080092A1 (en) * 2016-07-29 2018-01-29 Ideas & Motion S R L MEASURE WITHOUT CONTACT OF THE LEVEL OF A LIQUID IN A CONTAINER
IT201600080099A1 (en) * 2016-07-29 2018-01-29 Ideas & Motion S R L MEASURE WITHOUT CONTACT OF THE LEVEL OF A LIQUID IN A CONTAINER
JP6312222B2 (en) * 2016-09-26 2018-04-18 桓達科技股▲ふん▼有限公司ＦＩＮＥＴＥＫ Ｃｏ．，Ｌｔｄ． Liquid level sensing device
FR3100885B1 (en) * 2019-09-14 2021-10-08 Georges Eusebe Device for the Measurement of the height of a liquid by laser or LIDAR which is applied to the regulation of the level of a liquid in a swimming pool
CN110942738A (en) * 2019-12-04 2020-03-31 惠州市华星光电技术有限公司 Measurement device and measurement method for flicker value of display panel
CA3191316A1 (en) * 2020-08-13 2022-02-17 J. & M. Manufacturing Co., Inc. Automated grain filling system and related methods
CN112013236B (en) * 2020-09-01 2021-11-30 安徽工业大学 Inside detection device of large-scale spherical tank of modularization with self-locking function
WO2024054663A1 (en) * 2022-09-08 2024-03-14 Realmfive, Inc. Liquid monitoring system and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736217A (en) * 1987-04-29 1988-04-05 Mcdowell Lane C Camera platform for tripod mounting
US5257090A (en) * 1991-11-27 1993-10-26 United Technologies Corporation Laser diode liquid-level/distance measurement
US5687077A (en) * 1991-07-31 1997-11-11 Universal Dynamics Limited Method and apparatus for adaptive control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736217A (en) * 1987-04-29 1988-04-05 Mcdowell Lane C Camera platform for tripod mounting
US5687077A (en) * 1991-07-31 1997-11-11 Universal Dynamics Limited Method and apparatus for adaptive control
US5257090A (en) * 1991-11-27 1993-10-26 United Technologies Corporation Laser diode liquid-level/distance measurement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE49950E1 (en) 2022-11-10 2024-04-30 Leddartech Inc. Distance detection method and system

Also Published As

Publication number Publication date
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