CA2097481A1 - Method and an arrangement for distance measurement using the pulse transit time principle - Google Patents

Method and an arrangement for distance measurement using the pulse transit time principle

Info

Publication number
CA2097481A1
CA2097481A1 CA2097481A CA2097481A CA2097481A1 CA 2097481 A1 CA2097481 A1 CA 2097481A1 CA 2097481 A CA2097481 A CA 2097481A CA 2097481 A CA2097481 A CA 2097481A CA 2097481 A1 CA2097481 A1 CA 2097481A1
Authority
CA
Canada
Prior art keywords
profile
echo
stored
threshold profile
transit time
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.)
Granted
Application number
CA2097481A
Other languages
French (fr)
Other versions
CA2097481C (en
Inventor
Andre Elle
Hartmut Schmidt
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.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
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 Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of CA2097481A1 publication Critical patent/CA2097481A1/en
Application granted granted Critical
Publication of CA2097481C publication Critical patent/CA2097481C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/527—Extracting wanted echo signals
    • 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
    • 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • G01S15/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S15/523—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection
    • G01S15/526—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection by comparing echos in different sonar periods
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/908—Material level detection, e.g. liquid level

Abstract

For the measurement of distance using the pulse transit time principle the received signal produced after each trans-mission of a pulse is stored as an echo profile and the effective echo is determined from the stored echo profile. In order to suppress recurrent interfering signals a stationary threshold profile adapted to the measurement environment is formed and employed for each evaluation of a stored echo profile. In order to take into account fluctuations in the properties of the received echo profile rapidly without necessitating a modification in the stationary threshold profile for this, from a stored echo profile a floating threshold profile is generated in the form of a monotonously descending curve. From the mutually corresponding values of the floating threshold profile and of the stationary threshold profile the respectively larger value is utilized for the formation of a resulting threshold profile, which is employed for each evaluation of stored echo profiles.
CA002097481A 1992-06-03 1993-06-01 Method and an arrangement for distance measurement using the pulse transit time principle Expired - Fee Related CA2097481C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4218303A DE4218303C1 (en) 1992-06-03 1992-06-03 Method and arrangement for distance measurement according to the pulse transit time principle
DEP4218303.0 1992-06-03

Publications (2)

Publication Number Publication Date
CA2097481A1 true CA2097481A1 (en) 1993-12-04
CA2097481C CA2097481C (en) 1996-12-10

Family

ID=6460304

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002097481A Expired - Fee Related CA2097481C (en) 1992-06-03 1993-06-01 Method and an arrangement for distance measurement using the pulse transit time principle

Country Status (8)

Country Link
US (1) US5323361A (en)
EP (1) EP0573034B1 (en)
JP (1) JP2620492B2 (en)
AU (1) AU667535B2 (en)
CA (1) CA2097481C (en)
DE (2) DE4218303C1 (en)
ES (1) ES2118856T3 (en)
HU (1) HU213594B (en)

Families Citing this family (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5586085A (en) * 1991-10-31 1996-12-17 Lichte; Leo J. Container and adaptor for use with fluid volume sensor
DE4332071C2 (en) * 1993-09-21 1995-09-07 Endress Hauser Gmbh Co Level measurement method according to the radar principle
DE4414514A1 (en) * 1994-04-26 1995-11-02 Klaus Deichl Determining distance between two measuring locations
DE19540170C2 (en) * 1995-10-27 1998-01-29 Endress Hauser Gmbh Co Method and arrangement for suppressing fixed target echoes during distance measurement according to the pulse transit time principle
DE19528289A1 (en) * 1995-08-02 1997-02-06 Walter Mehl Detector determining at least one filling level value in tank of oil heating plant - equipped with electric controllable burner and filling level sensor system produces output signal activating switch off of burner if oil level is at distance h2 from base
DE19531662A1 (en) * 1995-08-29 1997-03-06 Claas Ohg Device for the automatic filling of loading containers
US5661251A (en) * 1995-12-19 1997-08-26 Endress + Hauser Gmbh + Co. Sensor apparatus for process measurement
US5827985A (en) * 1995-12-19 1998-10-27 Endress + Hauser Gmbh + Co. Sensor apparatus for process measurement
US6118282A (en) * 1995-12-19 2000-09-12 Endress & Hauser Gmbh & Co. Sensor apparatus
US5884231A (en) * 1995-12-21 1999-03-16 Endress & Hauser Gmbh & Co. Processor apparatus and method for a process measurement signal
US5841666A (en) * 1995-12-21 1998-11-24 Endress + Hauser Gmbh + Co. Processor apparatus and method for a process measurement signal
US5768939A (en) * 1996-06-10 1998-06-23 Kistler-Morse Corporation Method and apparatus for acoustic level measurements
US6122602A (en) * 1997-05-02 2000-09-19 Endress + Hauser Gmbh + Co. Method and arrangement for electromagnetic wave distance measurement by the pulse transit time method
ATE274707T1 (en) * 1997-06-27 2004-09-15 Eads Deutschland Gmbh LEVEL MEASUREMENT RADAR DEVICE
DE29722113U1 (en) * 1997-12-17 1998-03-12 Geller Hansjoerg Level measuring device
US5973637A (en) * 1998-01-09 1999-10-26 Endress + Hauser Gmbh + Co. Partial probe mapping
US6078280A (en) * 1998-01-09 2000-06-20 Endress + Hauser Gmbh + Co. Periodic probe mapping
GB2338132B (en) * 1998-06-02 2003-05-28 Federal Ind Ind Group Inc Echo detection in echo ranging systems
GB2342995B (en) * 1998-10-21 2003-02-19 Federal Ind Ind Group Inc Improvements in pulse-echo measurement systems
US6559657B1 (en) 1999-01-13 2003-05-06 Endress+Hauser Gmbh+Co. Probe mapping diagnostic methods
US6271762B1 (en) * 1999-02-27 2001-08-07 Breed Automotive Technology, Inc. Occupant position system and method using ultrasonic technology
GB9919366D0 (en) * 1999-08-16 1999-10-20 Meggitt Mobrey Limited Ultrasound level detection using a dynamic threshold
TW577986B (en) * 2000-07-31 2004-03-01 Chung Shan Inst Of Science Generation method and apparatus of dynamic delay curve for ultrasonic image formation system
WO2002048737A1 (en) 2000-12-14 2002-06-20 Pepperl + Fuchs Gmbh Adaptive comparator circuit and acoustic distance sensor comprising said circuit
DE10105662A1 (en) * 2001-02-08 2002-08-14 Grieshaber Vega Kg Level measuring device and method for contactless determination of the level of a filling material in a container
DE10139242A1 (en) * 2001-08-09 2003-03-06 Grieshaber Vega Kg Method and device for detecting a filling process
DE10260962A1 (en) * 2002-12-20 2004-07-01 Endress + Hauser Gmbh + Co. Kg Level measuring device and method for level measurement according to the runtime principle
US20050086013A1 (en) * 2003-09-04 2005-04-21 Couch Philip R. Analysis of ultrasonic reflections to measure distance
DE102004006015A1 (en) * 2004-02-06 2005-08-25 Robert Bosch Gmbh Method and device for adapting a threshold value of a detection device
DE102004011789A1 (en) * 2004-03-09 2005-09-29 Claas Selbstfahrende Erntemaschinen Gmbh Device for detecting a loading wagon
EP1628119A3 (en) * 2004-08-16 2012-07-25 VEGA Grieshaber KG Radar level measurement device with automatic echo signal determination
DE102004061449A1 (en) * 2004-12-17 2006-06-22 Endress + Hauser Gmbh + Co. Kg Level measuring device operating according to the transit time principle and method for its commissioning
DE102005044724A1 (en) * 2005-09-19 2007-03-22 Endress + Hauser Gmbh + Co. Kg Runtime measurement method for determining the distance
DE102006006572A1 (en) * 2006-02-13 2007-08-16 Vega Grieshaber Kg Method of measuring fill level in a container with a pulse propagation time level sensor using intermediate frequency sampling
NL1031209C2 (en) 2006-02-22 2007-08-24 Enraf Bv Method and device for accurately determining the level L of a liquid with the aid of radar signals radiated to the liquid level and radar signals reflected by the liquid level.
DE102007015920A1 (en) * 2007-03-28 2008-10-09 Continental Automotive Gmbh Method for distance determination using pulse-modulated sound signals
NL1034327C2 (en) 2007-09-04 2009-03-05 Enraf Bv Method and device for determining the level L of a liquid within a certain measuring range with the aid of radar signals radiated to the liquid level and radar signals reflected by the liquid level.
DE102007042042B4 (en) 2007-09-05 2020-03-26 Endress+Hauser SE+Co. KG Method for determining and monitoring the fill level of a medium in a container using a transit time measurement method
US8271212B2 (en) 2008-09-18 2012-09-18 Enraf B.V. Method for robust gauging accuracy for level gauges under mismatch and large opening effects in stillpipes and related apparatus
US8224594B2 (en) 2008-09-18 2012-07-17 Enraf B.V. Apparatus and method for dynamic peak detection, identification, and tracking in level gauging applications
US8659472B2 (en) 2008-09-18 2014-02-25 Enraf B.V. Method and apparatus for highly accurate higher frequency signal generation and related level gauge
EP2418465B1 (en) * 2010-07-19 2017-02-22 VEGA Grieshaber KG Amplitude profiling in fill level measuring devices
US9046406B2 (en) 2012-04-11 2015-06-02 Honeywell International Inc. Advanced antenna protection for radars in level gauging and other applications
CN104132713B (en) * 2014-05-22 2017-08-22 深圳万讯自控股份有限公司 A kind of guide wave radar liquid level gauge echo signal processing method and device
US10775221B2 (en) 2017-09-29 2020-09-15 Rosemount Tank Radar Ab Adaptive echo threshold
DE102017123529A1 (en) * 2017-10-10 2019-04-11 Endress+Hauser SE+Co. KG Method for determining the filling level of a filling material located in a container
HRP20231054T1 (en) * 2021-06-07 2023-12-22 Vega Grieshaber Kg Fill level radar with variable quantization accuracy

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000650B1 (en) * 1975-03-20 1995-11-14 Endress Hauser Gmbh Co Method and apparatus for ultrasonic material level measurement
US4245332A (en) * 1979-04-12 1981-01-13 Honeywell Inc. Receiver circuit for an echo-sounding system
GB2050022A (en) * 1979-05-02 1980-12-31 Moser M Intruder Alarm
CA1214858A (en) * 1984-09-27 1986-12-02 Stanley Panton Acoustic ranging system
US4992998A (en) * 1986-10-03 1991-02-12 Federal Industries Industrial Group Inc. Acoustic range finding system
US4890266A (en) * 1987-04-22 1989-12-26 Federal Industries Industrial Group Inc. Acoustic range finding system
WO1990008966A1 (en) * 1989-02-02 1990-08-09 Hawk Measurement Systems Pty. Limited Ultrasonic distance measuring
DD283221A5 (en) * 1989-05-17 1990-10-03 Freiberg Brennstoffinst CIRCUIT ARRANGEMENT FOR ELIMINATING FAULT SIGNALS IN ULTRASONIC RUN TIME MEASUREMENTS

Also Published As

Publication number Publication date
HU213594B (en) 1997-08-28
DE59308731D1 (en) 1998-08-13
JPH0666934A (en) 1994-03-11
CA2097481C (en) 1996-12-10
HU9301570D0 (en) 1993-09-28
EP0573034A3 (en) 1994-06-22
US5323361A (en) 1994-06-21
AU3990793A (en) 1993-12-09
AU667535B2 (en) 1996-03-28
ES2118856T3 (en) 1998-10-01
HUT64625A (en) 1994-01-28
EP0573034A2 (en) 1993-12-08
JP2620492B2 (en) 1997-06-11
DE4218303C1 (en) 1994-03-03
EP0573034B1 (en) 1998-07-08

Similar Documents

Publication Publication Date Title
CA2097481A1 (en) Method and an arrangement for distance measurement using the pulse transit time principle
US5361070B1 (en) Ultra-wideband radar motion sensor
EP0575725A3 (en) Adaptive signal detection process for the evaluation of multifrequency coded signals.
ES2019800A6 (en) Acoustic emission leak source location
CA2059665A1 (en) Periodic pulse discrimination system
NO942326L (en)
CA2212491A1 (en) Adaptive filtering of matched-filter data
GB1522911A (en) Automatic detection of tracked vehicles
GB1505977A (en) Echo ranging apparatus
JPS5781732A (en) Method and device for detecting echo in voice channel signal
EP0267075A3 (en) Method for determining formation characteristics with enhanced vertical resolution
WO1998043106A3 (en) Method for evaluating direction
CA2026023A1 (en) Bistatic radar seeker with range gating
WO1997037232A3 (en) Method and apparatus for measuring acceleration
GB2336485B (en) Monopulse generator
CA2605339A1 (en) Ultra-wideband radar motion sensor
IE782574L (en) Determining the velocity of acoustic waves in earth¹formations
WO2001005616A3 (en) Method for processing and storing sensor signals, and a correspondingly designed signal detection device
CA2089483A1 (en) Method for the simultaneous determination of target range and speed using a radar system
JPS5422898A (en) Paper detecting system
JPS576356A (en) Ultrasonic flaw detection method for pipe
JPS5781721A (en) Pulse input detector
JPS6426304A (en) Idle detection device of electric car
JPS6474492A (en) Road surface snowfall depth meter
JPS53119602A (en) Data transmission system

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed