FR2414204A1 - Digital liq. velocity measuring system - has transducer receiving reflected acoustic wave to provide HF pulses indicative of liq. velocity - Google Patents

Digital liq. velocity measuring system - has transducer receiving reflected acoustic wave to provide HF pulses indicative of liq. velocity

Info

Publication number
FR2414204A1
FR2414204A1 FR7900404A FR7900404A FR2414204A1 FR 2414204 A1 FR2414204 A1 FR 2414204A1 FR 7900404 A FR7900404 A FR 7900404A FR 7900404 A FR7900404 A FR 7900404A FR 2414204 A1 FR2414204 A1 FR 2414204A1
Authority
FR
France
Prior art keywords
liq
velocity
digital
acoustic wave
measuring system
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.)
Withdrawn
Application number
FR7900404A
Other languages
French (fr)
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.)
Medtronic Inc
Original Assignee
Medtronic Inc
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 US05/867,949 external-priority patent/US4147059A/en
Priority claimed from US05/867,950 external-priority patent/US4145925A/en
Application filed by Medtronic Inc filed Critical Medtronic Inc
Publication of FR2414204A1 publication Critical patent/FR2414204A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/06—Measuring blood flow
    • 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
    • G01F1/663—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 by measuring Doppler frequency shift

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Fluid Mechanics (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

A generator provides a relatively h.f. signal to a transmitting transducer for directing an ultrasonic wave into a conduit through which liq. is directed. A receiver transducer is disposed to receive the acoustical wave as reflected from the liq. and to provide an output signal to be amplified and demodulated to provide a train of h.f. pulses, the frequency of which is indicative of the velocity of the liq. The train of pulses is applied to a counter and a decoder to provide a signal to a display. A timing circuit is provided for enabling the generator, the counter and the decoder for a first, relatively short period of time, made dependent upon the cross-sectional area (or diameter) of the conduit through which the liq. is directed.
FR7900404A 1978-01-09 1979-01-09 Digital liq. velocity measuring system - has transducer receiving reflected acoustic wave to provide HF pulses indicative of liq. velocity Withdrawn FR2414204A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/867,949 US4147059A (en) 1978-01-09 1978-01-09 Digital liquid velocity measuring system
US05/867,950 US4145925A (en) 1978-01-09 1978-01-09 Digital liquid velocity measuring system

Publications (1)

Publication Number Publication Date
FR2414204A1 true FR2414204A1 (en) 1979-08-03

Family

ID=27128026

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7900404A Withdrawn FR2414204A1 (en) 1978-01-09 1979-01-09 Digital liq. velocity measuring system - has transducer receiving reflected acoustic wave to provide HF pulses indicative of liq. velocity

Country Status (2)

Country Link
DE (1) DE2900549A1 (en)
FR (1) FR2414204A1 (en)

Also Published As

Publication number Publication date
DE2900549A1 (en) 1979-07-12

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Legal Events

Date Code Title Description
ST Notification of lapse