Title:
音響流量計の校正方法
Document Type and Number:
Japanese Patent JP4724714
Kind Code:
B2
Abstract:
An acoustic flowmeter calibration method and sampling system address a variation in acoustic transducer delay time with increasing temperature. In one aspect, calibration of the path length between the sending and receiving transducers and calibration of the transducer delay time over a wide temperature range are optimized. In another aspect, the flowmeter output is temperature compensated based on the exhaust flowmeter gas temperature. These two aspects may be embodied in an ultrasonic flowmeter for exhaust gas measurement individually or in combination in accordance with the invention.
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Inventors:
Timothy A Nevias
Application Number:
JP2007522508A
Publication Date:
July 13, 2011
Filing Date:
June 17, 2005
Export Citation:
Assignee:
HORIBA, Ltd.
International Classes:
G01F25/00; G01F1/66
Domestic Patent References:
| JP3039244B2 | ||||
| JP2000346686A |
Attorney, Agent or Firm:
Ryuhei Nishimura
Akiko Sato
Akiko Sato