DK0829734T3 - Fremgangsmåde og indretning til måling af löbetidsforskellen for et elektrisk, elektromagnetisk eller akustisk signal - Google Patents
Fremgangsmåde og indretning til måling af löbetidsforskellen for et elektrisk, elektromagnetisk eller akustisk signalInfo
- Publication number
- DK0829734T3 DK0829734T3 DK97114393T DK97114393T DK0829734T3 DK 0829734 T3 DK0829734 T3 DK 0829734T3 DK 97114393 T DK97114393 T DK 97114393T DK 97114393 T DK97114393 T DK 97114393T DK 0829734 T3 DK0829734 T3 DK 0829734T3
- Authority
- DK
- Denmark
- Prior art keywords
- comparator
- difference
- measured
- threshold voltage
- test value
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
-
- 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
- G01F23/296—Acoustic waves
- G01F23/2962—Measuring transit time of reflected waves
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F10/00—Apparatus for measuring unknown time intervals by electric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Acoustics & Sound (AREA)
- Thermal Sciences (AREA)
- Measuring Volume Flow (AREA)
- Measurement Of Unknown Time Intervals (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19636945A DE19636945A1 (de) | 1996-09-11 | 1996-09-11 | Verfahren und Einrichtung zur Messung der Laufzeitdifferenz eines elektrischen, elektromagnetischen oder akustischen Signals |
Publications (1)
Publication Number | Publication Date |
---|---|
DK0829734T3 true DK0829734T3 (da) | 2005-03-14 |
Family
ID=7805284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK97114393T DK0829734T3 (da) | 1996-09-11 | 1997-08-20 | Fremgangsmåde og indretning til måling af löbetidsforskellen for et elektrisk, elektromagnetisk eller akustisk signal |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0829734B1 (da) |
AT (1) | ATE280956T1 (da) |
DE (2) | DE19636945A1 (da) |
DK (1) | DK0829734T3 (da) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPQ061399A0 (en) * | 1999-05-27 | 1999-06-17 | University Of Sydney, The | Acoustic flow meters |
FR2803383B1 (fr) * | 1999-12-29 | 2002-03-29 | Schlumberger Ind Sa | Procede et dispositif de detection d'un dysfonctionnement pour un debitmetre a ultrasons |
DE10118934C2 (de) * | 2001-04-18 | 2003-09-18 | Hydrometer Gmbh | Verfahren zur Justierung und zur Alterungskontrolle von Messgeräten mit Ultraschallwandlern |
DE10318779B4 (de) * | 2003-04-25 | 2005-09-15 | Hydrometer Gmbh | Verfahren zur Justierung und zur Alterskontrolle von Messgeräten mit Ultraschallwandlern |
AT6511U3 (de) | 2003-07-16 | 2004-09-27 | Avl List Gmbh | Ultraschall-gasdurchflusssensor sowie vorrichtung zur messung von abgas-strömungen von verbrennungskraftmaschinen sowie ein verfahren zur ermittlung des durchflusses von gasen |
DE102004025243A1 (de) | 2004-05-22 | 2005-12-08 | Robert Bosch Gmbh | Bestimmung des Empfangszeitpunkts eines Ultraschallsignals mittels Pulsformerfassung |
DE102004027958B4 (de) * | 2004-06-08 | 2007-07-12 | M & Fc Holding Llc | Verfahren und Vorrichtung zum Messen der Strömungsgeschwindigkeit von Fluiden |
DE102005035584B4 (de) * | 2005-07-29 | 2007-06-06 | Hydrometer Gmbh | Verfahren zur Durchführung von Durchflussmessungen in einem strömenden Fluid |
DE102011089152A1 (de) * | 2011-12-20 | 2013-06-20 | Endress + Hauser Gmbh + Co. Kg | Verfahren und Messgerät zur Abstandsmessung |
CN105698886B (zh) * | 2016-05-04 | 2019-05-24 | 湖北锐意自控系统有限公司 | 一种基于超声波检测技术的气体流量检测方法 |
JP7219582B2 (ja) * | 2018-10-17 | 2023-02-08 | アズビル株式会社 | 超音波流量計、流量計測方法、および流量演算装置 |
JP7248407B2 (ja) * | 2018-10-17 | 2023-03-29 | アズビル株式会社 | 超音波流量計、流量計測方法、および流量演算装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4028938A (en) * | 1976-01-26 | 1977-06-14 | Ocean Research Equipment, Inc. | Acoustical flow meter |
NL7801401A (nl) * | 1978-02-07 | 1979-08-09 | Tno | Stelsel voor het meten van de snelheid en/of het debiet van een fluidum. |
JPS5827449B2 (ja) * | 1978-08-09 | 1983-06-09 | 富士電機株式会社 | 超音波伝搬時間検出回路装置 |
DE2950902A1 (de) * | 1979-12-18 | 1981-07-23 | Me Meerestechnik Elektronik Gmbh, 2351 Trappenkamp | Empfangsschaltung fuer die laufzeitmessung von schallsignalen |
CH670896A5 (da) * | 1986-08-13 | 1989-07-14 | Zellweger Uster Ag | |
US5012449A (en) * | 1989-06-30 | 1991-04-30 | Ferranti O.R.E. Inc. | Sonic flow meter |
DE3923349A1 (de) * | 1989-07-14 | 1991-01-24 | Haiges Elektronik Gmbh | Verfahren und anordnung zur bestimmung des empfangszeitpunktes eines ultraschallsignales |
EP0452531B1 (de) * | 1990-04-20 | 1995-01-04 | Siemens Aktiengesellschaft | Elektrische Messeinrichtung für die Laufzeitmessung eines elektrischen Signals |
DE4114233C2 (de) * | 1991-04-26 | 1996-05-02 | Flexim Flexible Industriemeste | Anordnung zur Ultraschall-Durchflußmessung |
DE4322849C1 (de) * | 1993-07-08 | 1994-12-08 | Sick Optik Elektronik Erwin | Verfahren zur Bestimmung der Laufzeit von Schallsignalen und Schallwellen-Laufzeit-Bestimmungsvorrichtung |
DE4420329C1 (de) * | 1994-06-10 | 1995-10-26 | Hydrometer Gmbh | Verfahren zur Ultraschall-Messung von Durchflußmengen von strömenden Fluiden |
US5639971A (en) * | 1996-10-04 | 1997-06-17 | Dieterich Technology Holding Corp. | Method and apparatus for detecting a signal |
-
1996
- 1996-09-11 DE DE19636945A patent/DE19636945A1/de not_active Withdrawn
-
1997
- 1997-08-20 AT AT97114393T patent/ATE280956T1/de not_active IP Right Cessation
- 1997-08-20 DK DK97114393T patent/DK0829734T3/da active
- 1997-08-20 DE DE59712038T patent/DE59712038D1/de not_active Expired - Lifetime
- 1997-08-20 EP EP97114393A patent/EP0829734B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0829734B1 (de) | 2004-10-27 |
DE19636945A1 (de) | 1998-03-12 |
EP0829734A3 (de) | 1998-09-23 |
EP0829734A2 (de) | 1998-03-18 |
ATE280956T1 (de) | 2004-11-15 |
DE59712038D1 (de) | 2004-12-02 |
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