GB1509277A - Ultrasonic device for measurement of air flow in a pipe - Google Patents

Ultrasonic device for measurement of air flow in a pipe

Info

Publication number
GB1509277A
GB1509277A GB2038175A GB2038175A GB1509277A GB 1509277 A GB1509277 A GB 1509277A GB 2038175 A GB2038175 A GB 2038175A GB 2038175 A GB2038175 A GB 2038175A GB 1509277 A GB1509277 A GB 1509277A
Authority
GB
United Kingdom
Prior art keywords
transducers
pipe
bursts
pulse
reference point
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.)
Expired
Application number
GB2038175A
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.)
Fiat SpA
Original Assignee
Fiat SpA
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 Fiat SpA filed Critical Fiat SpA
Publication of GB1509277A publication Critical patent/GB1509277A/en
Expired legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1509277 Flowmeter FIAT SpA 14 May 1975 [30 May 1974] 20381/75 Heading G1G In a system for measuring the flow-rate of air in a pipe by transmitting bursts of ultrasonic waves alternately upstream and downstream by means of a pair of Piezo-electric transducers and determining the relative phases of the bursts received at the transducers, the first pulse within the burst is used as a reference point for the phase determination and the burst results from "ringing" of the transducer. Fig. 1 shows an embodiment having transducers 16, 18 on the induction pipe 14 of an internal combustion engine. A clocked bi-stable device 22 controls switches 24, 26 for alternate energization of the transducers. Processor 30 determines the relative phases of the received bursts, using the first pulse as the reference point. Subsequent circuits (not shown), compute the mass flow and give a signal for controlling fuel feed to the engine.
GB2038175A 1974-05-30 1975-05-14 Ultrasonic device for measurement of air flow in a pipe Expired GB1509277A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6868874A IT1014250B (en) 1974-05-30 1974-05-30 ULTRASONIC DEVICE FOR MEASURING THE AIR FLOW IN A DUCT

Publications (1)

Publication Number Publication Date
GB1509277A true GB1509277A (en) 1978-05-04

Family

ID=11310290

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2038175A Expired GB1509277A (en) 1974-05-30 1975-05-14 Ultrasonic device for measurement of air flow in a pipe

Country Status (4)

Country Link
DE (1) DE2524067A1 (en)
FR (1) FR2284866A1 (en)
GB (1) GB1509277A (en)
IT (1) IT1014250B (en)

Also Published As

Publication number Publication date
FR2284866B1 (en) 1980-11-28
DE2524067A1 (en) 1975-12-11
IT1014250B (en) 1977-04-20
FR2284866A1 (en) 1976-04-09

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920514