Title:
流速測定方法及び流速測定装置並びに流量測定方法及び流量測定装置
Document Type and Number:
Japanese Patent JP4538163
Kind Code:
B2
Abstract:
Disclosed is a method and apparatus for measuring flow velocity and flow rate of a fluid in a tube member or the like with high precision. A flow vel0ocity measuring method has: a step of allowing a signal sound of ultrasound to propagate through a fluid in a tube member or the like and detecting a phase difference between the signal sound and an original signal; a step of eliminating a phase difference detected in the step to obtain synchronism; a step of detecting time or oscillation frequency required to complete the phase synchronization in the step; and a step of, on the basis of the time or oscillation frequency required to complete phase synchronization in the step, calculating flow velocity by referring to flow velocity which is preset in a table in correspondence with the time or frequency. In the table, flow velocities corresponding to changes in temperature, pressure, and kind of a fluid may be preset together with the time or oscillation frequency. A flow velocity measuring apparatus is realized by hardware having the functions of the above steps. A flow rate is obtained by multiplying the measured flow velocity with the internal diameter of a tube member.
Inventors:
Komatsu Eisaku
Keiichi Matsushima
Keiichi Matsushima
Application Number:
JP2001098569A
Publication Date:
September 08, 2010
Filing Date:
March 30, 2001
Export Citation:
Assignee:
Surpass Industry Co., Ltd.
International Classes:
G01P5/00; G01F1/66
Domestic Patent References:
| JP58033123A | ||||
| JP54149670A |
Attorney, Agent or Firm:
Nobuyuki Kudo