DK166047C - FLOW VOLUME MEASURES FOR LIQUID MEDIA - Google Patents

FLOW VOLUME MEASURES FOR LIQUID MEDIA

Info

Publication number
DK166047C
DK166047C DK303687A DK303687A DK166047C DK 166047 C DK166047 C DK 166047C DK 303687 A DK303687 A DK 303687A DK 303687 A DK303687 A DK 303687A DK 166047 C DK166047 C DK 166047C
Authority
DK
Denmark
Prior art keywords
measuring
transmission
ultrasound
transducer
sampling
Prior art date
Application number
DK303687A
Other languages
Danish (da)
Other versions
DK303687D0 (en
DK303687A (en
DK166047B (en
Inventor
Juergen Merkel
Niels Thorup Andersen
Original Assignee
Landis & Gyr Gmbh
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 Landis & Gyr Gmbh filed Critical Landis & Gyr Gmbh
Publication of DK303687D0 publication Critical patent/DK303687D0/en
Publication of DK303687A publication Critical patent/DK303687A/en
Publication of DK166047B publication Critical patent/DK166047B/en
Application granted granted Critical
Publication of DK166047C publication Critical patent/DK166047C/en

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
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
    • G01R25/08—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents by counting of standard pulses

Abstract

1. A flow volume meter for fluid media comprising an ultrasound measuring section (2), a first measuring transducer (6) and a second measuring transducer (7) for ultrasound, which are connected to a measuring member (10) and an oscillator (15) which is installed in a transmission member (8) and serves to produce a transmission signal (26) with a transmission frequency (f1 ) for the periodic repeated actuation of the two measuring transducers (6, 7), in which the measuring member (10) measures the difference, caused in the measuring section (2) by the flow of medium, in the ultrasound transit time between the first measuring transducer (6) as a transmitter and the second measuring tranducer (7) as a receiver on the one hand and the transit time between the second measuring transducer (7) as a transmitter and the first measuring transducer (6) as a receiver on the other hand, a pulse generator (13) for repeatedly triggering off a measuring cycle (22), a control member (9), an evaluation means (11) for converting the transit time differences into units in proportion to the volume of the medium flowing per unit of time through the measuring section (2), and a counting means (12) for summing those units, characterised in that the oscillator (15) includes a means (43, 44; 43, 52, 52', 48; 9, 44, 54 to 59) for varying the transmission frequency (f1 ) in a predetermined range of values, that provided in the evaluation means (11) is a sampling generator (36) for producing sampling signals at a pulse frequency (f2 ) and that for all measuring cycles (22) the phase position determined by the sampling generator (36) between the transmission signals (26) and the sampling signals have randomly distributed values.
DK303687A 1986-06-17 1987-06-15 FLOW VOLUME MEASURES FOR LIQUID MEDIA DK166047C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH244086 1986-06-17
CH2440/86A CH670506A5 (en) 1986-06-17 1986-06-17

Publications (4)

Publication Number Publication Date
DK303687D0 DK303687D0 (en) 1987-06-15
DK303687A DK303687A (en) 1987-12-18
DK166047B DK166047B (en) 1993-03-01
DK166047C true DK166047C (en) 1993-08-02

Family

ID=4233867

Family Applications (1)

Application Number Title Priority Date Filing Date
DK303687A DK166047C (en) 1986-06-17 1987-06-15 FLOW VOLUME MEASURES FOR LIQUID MEDIA

Country Status (5)

Country Link
EP (1) EP0249691B1 (en)
AT (1) ATE54752T1 (en)
CH (1) CH670506A5 (en)
DE (1) DE3763760D1 (en)
DK (1) DK166047C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59107864D1 (en) * 1991-01-29 1996-07-04 Landis & Gyr Tech Innovat Flow volume meter for liquid media
CH684767A5 (en) * 1993-03-19 1994-12-15 Landis & Gyr Tech Innovat Sealing device for transmitter.
DE19530807C2 (en) * 1995-08-22 1999-11-18 Krohne Ag Basel Method for determining the volume flow of flowing media
DE10163566A1 (en) * 2001-12-21 2003-07-10 Flowtec Ag pulse generator
DE10254054A1 (en) * 2002-11-19 2004-06-03 Endress + Hauser Flowtec Ag, Reinach Device for determining and / or monitoring the volume and / or mass flow of a medium
DE102004023147A1 (en) 2004-05-07 2005-11-24 Endress + Hauser Flowtec Ag, Reinach Device for determining and / or monitoring the volume and / or mass flow rate of a medium
EP2154492A1 (en) * 2005-10-24 2010-02-17 Hydrometer GmbH Ultrasound flow meter with LC voltage increase

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH604133A5 (en) * 1977-05-10 1978-08-31 Landis & Gyr Ag
US4178631A (en) * 1978-02-13 1979-12-11 Tractor, Inc. Digital phase detector and method

Also Published As

Publication number Publication date
DK303687D0 (en) 1987-06-15
DK303687A (en) 1987-12-18
EP0249691B1 (en) 1990-07-18
ATE54752T1 (en) 1990-08-15
EP0249691A1 (en) 1987-12-23
DE3763760D1 (en) 1990-08-23
CH670506A5 (en) 1989-06-15
DK166047B (en) 1993-03-01

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment
PBP Patent lapsed

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