JPS55112522A - Wide-range acoustic wave flow speed measuring unit - Google Patents

Wide-range acoustic wave flow speed measuring unit

Info

Publication number
JPS55112522A
JPS55112522A JP553079A JP553079A JPS55112522A JP S55112522 A JPS55112522 A JP S55112522A JP 553079 A JP553079 A JP 553079A JP 553079 A JP553079 A JP 553079A JP S55112522 A JPS55112522 A JP S55112522A
Authority
JP
Japan
Prior art keywords
frequency
flow speed
receivers
acoustic wave
fundamental frequency
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.)
Granted
Application number
JP553079A
Other languages
Japanese (ja)
Other versions
JPS5856416B2 (en
Inventor
Takehiro Shimizu
Akio Kono
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.)
Nippon Res & Syst
Nippon Res & Syst kk
Osaka Gas Co Ltd
Original Assignee
Nippon Res & Syst
Nippon Res & Syst kk
Osaka Gas 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 Nippon Res & Syst, Nippon Res & Syst kk, Osaka Gas Co Ltd filed Critical Nippon Res & Syst
Priority to JP553079A priority Critical patent/JPS5856416B2/en
Publication of JPS55112522A publication Critical patent/JPS55112522A/en
Publication of JPS5856416B2 publication Critical patent/JPS5856416B2/en
Expired legal-status Critical Current

Links

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  • Measuring Volume Flow (AREA)

Abstract

PURPOSE:To make it possible to measure a flow speed in a wide range by a sensor which is small- size and has no movable part, by transmitting the acoustic wave obtained by subjecting oscillation frequency f of a fundamental frequency oscillator to amplitude modulation by the frequency of f/n and by detecting the phase difference by receivers in the upper stream and the lower stream. CONSTITUTION:Acoustic wave generator A is provided in pipe P where fluid flows, and receivers B and C are provided in the upper stream and the lower stream of generator A respectively, and the phase difference between their receiving signals is detected, thereby measuring the flow speed. In this case, the frequency of f/n is generated from oscillation frequency f of fundamental frequency oscillator 1 by frequency divider 2, and fundamental frequency f is subjected to amplitude modulation in modulator circuit 3 by this generated frequency, and this modulated frequency is transmitted to transmitter A. The receiving signal is received by receivers B and C and is caused to pass through amplifiers 4 and 5, and after that, the receiving signal is separated into the system where fundamental frequency f is taken out through limiters 6 and 6' and the system where modulated frequency f/n is taken out by detection amplifiers 8 and 8', and the phase difference between both receivers B and C is measured and is displayed on low-speed display equipment 7 and high- speed display equipment 9. As a result, the flow speed measure range can be extended n-number times in comparison with the range for fundamental frequency f.
JP553079A 1979-01-23 1979-01-23 Wide range sound wave velocity measuring device Expired JPS5856416B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP553079A JPS5856416B2 (en) 1979-01-23 1979-01-23 Wide range sound wave velocity measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP553079A JPS5856416B2 (en) 1979-01-23 1979-01-23 Wide range sound wave velocity measuring device

Publications (2)

Publication Number Publication Date
JPS55112522A true JPS55112522A (en) 1980-08-30
JPS5856416B2 JPS5856416B2 (en) 1983-12-14

Family

ID=11613737

Family Applications (1)

Application Number Title Priority Date Filing Date
JP553079A Expired JPS5856416B2 (en) 1979-01-23 1979-01-23 Wide range sound wave velocity measuring device

Country Status (1)

Country Link
JP (1) JPS5856416B2 (en)

Also Published As

Publication number Publication date
JPS5856416B2 (en) 1983-12-14

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