Title:
FLOWMETER
Document Type and Number:
WIPO Patent Application WO/2019/049290
Kind Code:
A1
Abstract:
[Problem] To provide a flowmeter that achieves both high reliability and low cost. [Solution] A flowmeter 1 according to the present invention is provided with: an impeller 42 rotatably supported in a flow path 13; a GMR sensor 53 for detecting a change in the intensity of a magnetic field caused in accordance with rotation of the impeller 42; and a bias magnet 57 for applying a bias magnetic field to the GMR sensor 53, wherein a magnetic body that is not magnetized is used as the impeller 42, and the GMR sensor 53 and the bias magnet 57 are disposed outside the flow path 13. Accordingly, even when a fluid flowing in the flow path 13 contains iron powder, the iron powder does not adhere to or become deposited on the impeller 42, whereby smooth rotation of the impeller 42 is not inhibited. Consequently, the measurement precision of the flowmeter 1 can be ensured.
More Like This:
| WO/1997/016705 | DETECTION SYSTEM FOR A FLOWMETER |
| WO/2010/141057 | TURBINE FLOW METER |
Inventors:
KAWAMOTO TAKAHIRO (JP)
SHIMADA TAKUO (JP)
TOBIMATSU SHINJI (JP)
SEKINE TETSUAKI (JP)
SHIMADA TAKUO (JP)
TOBIMATSU SHINJI (JP)
SEKINE TETSUAKI (JP)
Application Number:
PCT/JP2017/032374
Publication Date:
March 14, 2019
Filing Date:
September 07, 2017
Export Citation:
Assignee:
TOFLO CORP (JP)
International Classes:
G01F1/115
Domestic Patent References:
| WO2008105331A1 | 2008-09-04 |
Foreign References:
| JP2007170896A | 2007-07-05 | |||
| JPH10234746A | 1998-09-08 | |||
| US20130191045A1 | 2013-07-25 | |||
| US20150135852A1 | 2015-05-21 | |||
| JP2017173323A | 2017-09-28 |
Attorney, Agent or Firm:
KAYAHARA Yuji (JP)
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