JPS57147064A - Eddy current type measuring device - Google Patents

Eddy current type measuring device

Info

Publication number
JPS57147064A
JPS57147064A JP3215481A JP3215481A JPS57147064A JP S57147064 A JPS57147064 A JP S57147064A JP 3215481 A JP3215481 A JP 3215481A JP 3215481 A JP3215481 A JP 3215481A JP S57147064 A JPS57147064 A JP S57147064A
Authority
JP
Japan
Prior art keywords
eddy current
signal
operated
temperature
exciting
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
JP3215481A
Other languages
Japanese (ja)
Other versions
JPH0124265B2 (en
Inventor
Motoyoshi Ikemi
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP3215481A priority Critical patent/JPS57147064A/en
Publication of JPS57147064A publication Critical patent/JPS57147064A/en
Publication of JPH0124265B2 publication Critical patent/JPH0124265B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/08—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect

Abstract

PURPOSE:To reduce the variance of sensitivity due to the variance of temperature, by operating the temperature, the current velocity, the percentage of voids, etc. of a fluid in every different exciting frequency and adopting their maximum values in the eddy current type measuring device. CONSTITUTION:In a detecting part 10 arranged along the current direction of a conductive fluid, an eddy current is generated in the fluid when an exciting winding 12 is excited by an AC signal. An induced signal corresponding to the eddy current is detected by detecting coils 11 and 13, and the temperature is operated on a basis of the sum of detection signals by an operating circuit 30, and the current velocity is operated on a basis of the difference between them by the circuit 30, and a signal related to the velocity is rectified synchronously by a signal, which has a phase shifted at 90 deg. from he exciting signal, to operate the percentage of voids by the circuit 30. The exciting frequency is switched to three frequencies fmin, fopt, and fmax to operate these operations, and operated results are compared successively with operation results stored in a memory 50 by a comparator 50 to output maximum operation results as measured values.
JP3215481A 1981-03-06 1981-03-06 Eddy current type measuring device Granted JPS57147064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3215481A JPS57147064A (en) 1981-03-06 1981-03-06 Eddy current type measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3215481A JPS57147064A (en) 1981-03-06 1981-03-06 Eddy current type measuring device

Publications (2)

Publication Number Publication Date
JPS57147064A true JPS57147064A (en) 1982-09-10
JPH0124265B2 JPH0124265B2 (en) 1989-05-10

Family

ID=12350994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3215481A Granted JPS57147064A (en) 1981-03-06 1981-03-06 Eddy current type measuring device

Country Status (1)

Country Link
JP (1) JPS57147064A (en)

Also Published As

Publication number Publication date
JPH0124265B2 (en) 1989-05-10

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