JPS63212843A - Method for vibrating vibration piece of viscometer - Google Patents

Method for vibrating vibration piece of viscometer

Info

Publication number
JPS63212843A
JPS63212843A JP4636887A JP4636887A JPS63212843A JP S63212843 A JPS63212843 A JP S63212843A JP 4636887 A JP4636887 A JP 4636887A JP 4636887 A JP4636887 A JP 4636887A JP S63212843 A JPS63212843 A JP S63212843A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
vibration source
ammeter
constant
power
voltmeter
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
JP4636887A
Inventor
Masatoshi Tokuda
Toshiyuki Yamamoto
Original Assignee
Sumitomo Metal Ind 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

Links

Abstract

PURPOSE: To keep the drive power to a vibration source constant regardless of any change in impedance accompanied by the change of circumferential environment, by measuring the current and voltage applied to the vibration source and controlling both of them so as to make the driving power of the vibration source constant.
CONSTITUTION: An ammeter A is connected to a vibration source 21 in series with respect to a power amplifier 36 and a voltmeter V is connected in parallel to the series circuit of the ammeter A of the vibration source 21. The indication values (i), (v) of the ammeter A and voltmeter V are read by the operation part of a measuring apparatus main body. A control signal is outputted to the power amplifier 36 from an operational control part through an oscillator in order to regulate a current and/or voltage so as to make the driving power P applied to the vibration source 21 given by formula I (wherein Za is the internal impedance of the ammeter) constant.
COPYRIGHT: (C)1988,JPO&Japio
JP4636887A 1987-02-27 1987-02-27 Method for vibrating vibration piece of viscometer Pending JPS63212843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4636887A JPS63212843A (en) 1987-02-27 1987-02-27 Method for vibrating vibration piece of viscometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4636887A JPS63212843A (en) 1987-02-27 1987-02-27 Method for vibrating vibration piece of viscometer

Publications (1)

Publication Number Publication Date
JPS63212843A true true JPS63212843A (en) 1988-09-05

Family

ID=12745209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4636887A Pending JPS63212843A (en) 1987-02-27 1987-02-27 Method for vibrating vibration piece of viscometer

Country Status (1)

Country Link
JP (1) JPS63212843A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5082755A (en) * 1989-10-02 1992-01-21 General Electric Company Liquid crystal programmable photoresist exposure method for making a set of masks

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417694A (en) * 1977-07-05 1979-02-09 Motorola Inc Piezooelectric bimorph or monomorph curved vibrator structure
JPS6012414A (en) * 1983-06-10 1985-01-22 Russell Co Inc Arthur Control circuit for vibrator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5417694A (en) * 1977-07-05 1979-02-09 Motorola Inc Piezooelectric bimorph or monomorph curved vibrator structure
JPS6012414A (en) * 1983-06-10 1985-01-22 Russell Co Inc Arthur Control circuit for vibrator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5082755A (en) * 1989-10-02 1992-01-21 General Electric Company Liquid crystal programmable photoresist exposure method for making a set of masks

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