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. velocityInfo
- 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- Withdrawn
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.
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) |
-
1979
- 1979-01-08 DE DE19792900549 patent/DE2900549A1/en not_active Withdrawn
- 1979-01-09 FR FR7900404A patent/FR2414204A1/en not_active Withdrawn
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 |