JPS56164918A - Ultrasonic flowmeter - Google Patents

Ultrasonic flowmeter

Info

Publication number
JPS56164918A
JPS56164918A JP6784880A JP6784880A JPS56164918A JP S56164918 A JPS56164918 A JP S56164918A JP 6784880 A JP6784880 A JP 6784880A JP 6784880 A JP6784880 A JP 6784880A JP S56164918 A JPS56164918 A JP S56164918A
Authority
JP
Japan
Prior art keywords
transducer
flow
conducted
time
circuit
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.)
Pending
Application number
JP6784880A
Other languages
Japanese (ja)
Inventor
Masaru Kono
Yukio Nakagawa
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP6784880A priority Critical patent/JPS56164918A/en
Priority to DE19813121778 priority patent/DE3121778A1/en
Publication of JPS56164918A publication Critical patent/JPS56164918A/en
Pending 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

PURPOSE:To reduce measurement errors owing to channeling by disposing plural pairs of transducers in a manner as to intersect obliquely with the flow of fluid, alternately changing over the transmission side and the reception side and driving the transducers disposed on the same side. CONSTITUTION:A transducer 13 is operated as a transmitter by the mode change signal A from a mode selector 109, and the output signal of a transmission circuit 105 is conducted to the transducer 13. The converted output electric signal from a transducer 12 is conducted to the reception circuit. The forward propagation time of the time when ultrasonic pulses are propagated in the forward direction with respect to the flow of fluid 2 after a prescribed time is substituted to the oscillation frequency FA of an oscillator 111, and the measurement in the forward time ends. Next, the transducer 12 is operated as a receiver by the mode change signal B from the selector 109, and the electric signal from the transducer 13 is conducted to a circuit 107. The backward propagation time with respect to the flow V is substituted to the oscillation frequency FB of an oscillator 12. Next, the difference between the frequencies FA and FB is measured and the measured value of the flow speed is determined.
JP6784880A 1980-05-23 1980-05-23 Ultrasonic flowmeter Pending JPS56164918A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP6784880A JPS56164918A (en) 1980-05-23 1980-05-23 Ultrasonic flowmeter
DE19813121778 DE3121778A1 (en) 1980-05-23 1981-05-25 Ultrasonic flow meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6784880A JPS56164918A (en) 1980-05-23 1980-05-23 Ultrasonic flowmeter

Publications (1)

Publication Number Publication Date
JPS56164918A true JPS56164918A (en) 1981-12-18

Family

ID=13356780

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6784880A Pending JPS56164918A (en) 1980-05-23 1980-05-23 Ultrasonic flowmeter

Country Status (2)

Country Link
JP (1) JPS56164918A (en)
DE (1) DE3121778A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262441B1 (en) * 1986-09-30 1991-03-27 Siemens Aktiengesellschaft Ultrasonic phase difference method for measuring high flow velocities
DE4228977A1 (en) * 1992-08-31 1994-03-03 Remos Gmbh Entwicklung Und Pro Throughflow measurement in mains pipe - using acoustic properties of pipes such as Doppler effect and sound wave expansion to obtain data concerning throughflow
TW229269B (en) * 1992-09-17 1994-09-01 United Sciences Inc
DE19606411C2 (en) * 1996-02-21 2000-05-11 Krohne Messtechnik Kg Muffler for ultrasonic waves

Also Published As

Publication number Publication date
DE3121778A1 (en) 1982-05-19

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