Title:
コリオリ流量計における過渡的気泡への対処
Document Type and Number:
Japanese Patent JP3547708
Kind Code:
B2
Abstract:
A Coriolis flowmeter is operable as a vibrating tube densitometer where a flowtube is driven to vibrate at a fundamental frequency from which density of the material flowing through the flowtube may be calculated. The drive gain is monitored as an indicator of multiphase flow including gas and liquid components where a substantial increase in drive gain indicates gas damping of the flowtube vibrations due to a transient bubble entering the flowtube. The gas damping effects of the transient bubble and the correspondingly reduced density readings are remediated by the use of historical density measurements corresponding to periods of flow when no transient bubble has entered the flowtube.
Inventors:
Robert E. Dutton
Application Number:
JP2000572636A
Publication Date:
July 28, 2004
Filing Date:
September 09, 1999
Export Citation:
Assignee:
Micro Motion Incorporated
International Classes:
G01F1/74; G01F1/84; G01N9/00; G01N9/32; (IPC1-7): G01F1/84; G01F1/74; G01N9/00
Domestic Patent References:
| JP10504391A |
Attorney, Agent or Firm:
Kazuo Shamoto
Shosuke Imai
Tadashi Masui
Yasushi Kobayashi
Hiroyuki Tomita
Hideo Tanaka
Shosuke Imai
Tadashi Masui
Yasushi Kobayashi
Hiroyuki Tomita
Hideo Tanaka