Title:
FLOW RATE MEASURING INSTRUMENT
Document Type and Number:
Japanese Patent JPH01118721
Kind Code:
A
Abstract:
PURPOSE:To eliminate the need for air bleeding between a measurement tip part and a sensing part by fitting a thin pipe penetrating a cylindrical main body clamped between piping flanges at right angles and fitting >=1 pressure sensor on its surface. CONSTITUTION:The cylindrical main body 12 is clamped 11b between the piping flanges 11a of a conduit 11 and fluid is made to flow, so that the fluid flows around the thin pipe 13 perpendicular to the flow (a) along its surface. Then pressure sensors 14 and 15 (consisting of a semiconductor and a small strain gauge) which are arranged in parallel and at right angles to the flow (a) detect the static pressure and total pressure (dynamic pressure plus static pressure) of the fluid respectively. Their pressure values are connected to a computing element 16 such as an operational amplifier which is provided externally. Then the dynamic pressure, flow velocity, and flow rate are calculated. When plural pressure sensors are used, the mean value of those detected values is calculated. The fitting of this device to the piping 11 is facilitated and measuring operation is speeded up.
Inventors:
NAKANISHI MIKIMA
Application Number:
JP27573487A
Publication Date:
May 11, 1989
Filing Date:
November 02, 1987
Export Citation:
Assignee:
TOMOE GIJUTSU KENKYUSHO
International Classes:
G01F1/46; (IPC1-7): G01F1/46
Domestic Patent References:
| JPS616724B2 | 1986-02-28 | |||
| JP60098067B | ||||
| JP60183822B | ||||
| JP54011651B |
Attorney, Agent or Firm:
Shigeru Yagita (3 outside)