Document Type and Number:
Japanese Patent JP5015622
Kind Code:
B2
Abstract:
To continuously measure the flow of fluid in a channel with a simple constitution, and to reduce the construction cost when it is installed in the channel and facilitate periodical verification and calibration with a simple and inexpensive constitution.
An injection pipe 1 is arranged in a duct 110 on the upstream side. A fluid pressure detection device 2 is arranged in a duct 120 on the downstream side. CO2gas is injected into the duct 110 from the injection pipe 1, and the injection amount of the CO2gas is recognized. CO2gas is sampled using, as a sampling pipe, a fluid pressure detection body 21 on the upstream side of the fluid pressure detection device 2. Flow is determined based on the concentration of the sampled CO2gas. The fluid differential pressure between the fluid pressure detection body 21 on the upstream side and a fluid pressure detection body 22 on the downstream side is detected by a differential pressure indicator 3. The relation between the flow and differential pressure determined by the gas tracer method is investigated. Then, the flow is determined based on the differential pressure detected by the fluid pressure detection device 2 and the relation.
COPYRIGHT: (C)2008,JPO&INPIT
Application Number:
JP2007020753A
Publication Date:
August 29, 2012
Filing Date:
January 31, 2007
International Classes:
G01F1/34; G01F1/46; G01F1/704; G01F25/00
Domestic Patent References:
| JP57033327A | | | | |
| JP3220421A | | | | |
| JP11118545A | | | | |
| JP2005147682A | | | | |
| JP9210750A | | | | |
| JP2003532066A | | | | |
| JP1099021U | | | | |
| JP60183822U | | | | |
Attorney, Agent or Firm:
Hideo Takino
Sadao Matsumura
Fumio Takino
