Title:
ULTRASONIC WAVE FLOWMETER
Document Type and Number:
Japanese Patent JP2004226391
Kind Code:
A
Abstract:
To provide an ultrasonic wave flowmeter which can perform stable control of flow rate.
A pair of ultrasonic wave transmitter/receiver 2a,2b are installed on a circumference part of a tube 1, in which a fluid flows. While ultrasonic waves are propagated bidirectionally between the ultrasonic wave transmitter/receiver 2a,2b, the flow rate value of the fluid is measured, based on the time difference of the propagation times of the respective ultrasonic waves received. When the variation in the flow rate value exceeds a specified flow rate value, a determining section 8 determines that the measured flow rate value is abnormal.
Inventors:
MASUNAGA YASUYUKI
HIRAYAMA NORITOMO
KASHIMURA OSAMU
TACHIKAWA HIROYUKI
HIRAYAMA NORITOMO
KASHIMURA OSAMU
TACHIKAWA HIROYUKI
Application Number:
JP2003057452A
Publication Date:
August 12, 2004
Filing Date:
March 04, 2003
Export Citation:
Assignee:
FUJI ELECTRIC RETAIL SYSTEMS
International Classes:
G01F1/00; G01F1/66; (IPC1-7): G01F1/66; G01F1/00
Attorney, Agent or Firm:
Hiroaki Sakai