Title:
超音波式ガスメータ
Document Type and Number:
Japanese Patent JP5758066
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an ultrasonic gas meter capable of determining dew condensation while saving costs, and to provide a dew condensation decision method of the gas meter.SOLUTION: The ultrasonic gas meter 40 includes: transducers TD1 and TD2 intermittently transmitting an ultrasonic signal into a gas passage and receiving an ultrasonic signal; an amplifier 43a amplifying the signal received by the transducers TD1 and TD2 to predetermined intensity; and a CPU 14a for determining the generation of the dew condensation in a meter passage, when an amplification degree provided by the amplifier 43a is monitored for every predetermined time, and the monitored amplification degree changes from an initial value by a predetermined value or more.
Inventors:
Toshifumi Tabitsu
Kimikatsu Isobe
Ryomei Yamaura
Akihiko Hakamada
Shinichi Kawakubo
Kimikatsu Isobe
Ryomei Yamaura
Akihiko Hakamada
Shinichi Kawakubo
Application Number:
JP2009160556A
Publication Date:
August 05, 2015
Filing Date:
July 07, 2009
Export Citation:
Assignee:
Yazaki Energy System Co., Ltd.
International Classes:
G01F3/22; G01F1/66
Domestic Patent References:
| JP2005315717A | ||||
| JP2006242658A | ||||
| JP2005257445A |
Attorney, Agent or Firm:
Nobuo Nakamura