Title:
差圧測定システム及び差圧測定方法
Document Type and Number:
Japanese Patent JP4817786
Kind Code:
B2
Abstract:
A differential pressure measuring system includes a light source for emitting a light, a first transducer for attenuating the intensity of the emitted light in a first range, depending on a first pressure, and providing a first light, a second transducer for attenuating the intensity of the first light in a second range, depending on a second pressure, and providing a second light, a feedback circuit for adjusting the intensity of the emitted light to maintain the intensity of the second light in the second range constant, and a measuring module for measuring a differential pressure between the first and second pressures, based on the intensities of the second light in the first and second ranges.
Inventors:
Shizuichiro Kinugasa
Application Number:
JP2005290508A
Publication Date:
November 16, 2011
Filing Date:
October 03, 2005
Export Citation:
Assignee:
YAMATAKE CORPORATION
International Classes:
G01L13/00; G01L11/02
Domestic Patent References:
| JP7027696A | ||||
| JP6034474A | ||||
| JP2057909A | ||||
| JP2002372472A | ||||
| JP2003166890A | ||||
| JP2003166891A | ||||
| JP2003132772A | ||||
| JP62167425A | ||||
| JP58132637A | ||||
| JP2049115A |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu