DE3542704A1 - Verfahren und einrichtung zur temperaturunabhaengigen messung einer mittleren stroemungsgeschwindigkeit einer fluessigkeit - Google Patents

Verfahren und einrichtung zur temperaturunabhaengigen messung einer mittleren stroemungsgeschwindigkeit einer fluessigkeit

Info

Publication number
DE3542704A1
DE3542704A1 DE19853542704 DE3542704A DE3542704A1 DE 3542704 A1 DE3542704 A1 DE 3542704A1 DE 19853542704 DE19853542704 DE 19853542704 DE 3542704 A DE3542704 A DE 3542704A DE 3542704 A1 DE3542704 A1 DE 3542704A1
Authority
DE
Germany
Prior art keywords
value
carrier
pulses
carrier frequency
computer
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
DE19853542704
Other languages
German (de)
English (en)
Other versions
DE3542704C2 (enrdf_load_stackoverflow
Inventor
Claudio Dipl.-El.Ing. ETH Cham Meisser
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.)
Siemens Building Technologies AG
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
LGZ Landis and Gyr Zug AG
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 CH4854/85A external-priority patent/CH660008A5/de
Application filed by Landis and Gyr AG, LGZ Landis and Gyr Zug AG filed Critical Landis and Gyr AG
Publication of DE3542704A1 publication Critical patent/DE3542704A1/de
Application granted granted Critical
Publication of DE3542704C2 publication Critical patent/DE3542704C2/de
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
    • G01P5/245—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by measuring transit time of acoustical waves
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Measuring Volume Flow (AREA)
DE19853542704 1985-11-12 1985-12-03 Verfahren und einrichtung zur temperaturunabhaengigen messung einer mittleren stroemungsgeschwindigkeit einer fluessigkeit Granted DE3542704A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH4854/85A CH660008A5 (de) 1984-11-22 1985-11-12 Pharmazeutisches mittel, enthaltend isosilybinfreies silibinin, und verfahren zur herstellung von isosilybinfreiem silibinin.

Publications (2)

Publication Number Publication Date
DE3542704A1 true DE3542704A1 (de) 1986-07-03
DE3542704C2 DE3542704C2 (enrdf_load_stackoverflow) 1987-11-26

Family

ID=4283703

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853542704 Granted DE3542704A1 (de) 1985-11-12 1985-12-03 Verfahren und einrichtung zur temperaturunabhaengigen messung einer mittleren stroemungsgeschwindigkeit einer fluessigkeit

Country Status (1)

Country Link
DE (1) DE3542704A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014079733A1 (de) * 2012-11-26 2014-05-30 Endress+Hauser Flowtec Ag Feldgerät, insbesondere ultraschall-durchflussmessgerät

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3120541A1 (de) * 1980-05-28 1982-12-23 Siemens AG, 1000 Berlin und 8000 München Verbesserung eines durchfluss-stroemungsmessers mit ultraschall

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3120541A1 (de) * 1980-05-28 1982-12-23 Siemens AG, 1000 Berlin und 8000 München Verbesserung eines durchfluss-stroemungsmessers mit ultraschall

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DE-Z: ACUSTICA, Vol. 26 (1972), S. 284 - 288 *
DE-Z: VDI-Berichte, Nr. 509 (1984), S. 39 - 42 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014079733A1 (de) * 2012-11-26 2014-05-30 Endress+Hauser Flowtec Ag Feldgerät, insbesondere ultraschall-durchflussmessgerät
US10145714B2 (en) 2012-11-26 2018-12-04 Endress + Hauser Flowtec Ag Ultrasonic flow measuring device having a downstream resistance network for improved zero point stability

Also Published As

Publication number Publication date
DE3542704C2 (enrdf_load_stackoverflow) 1987-11-26

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee