Measuring and testing – Volume or rate of flow – Mass flow by imparting angular or transverse momentum to the...
Patent
1997-09-08
1999-10-12
Chilcot, Richard
Measuring and testing
Volume or rate of flow
Mass flow by imparting angular or transverse momentum to the...
73861355, 73861354, 73861351, 73 32A, G01N 900
Patent
active
059658240
ABSTRACT:
A vibration type measuring instrument measures at least one of density and mass flow rate of a fluid in a straight measurement pipe by vibrating the pipe. The vibration type measuring instrument comprises the pipe; a sensor for detecting the vibration of the pipe; and a signal processing circuit for obtaining the resonant angular frequency .omega. and axial force T based on the detection signal of the sensor, and obtaining the density .rho.w of the fluid flowing through the pipe using the obtained resonant angular frequency .omega. and axial force T. The density .rho.w is obtained by the following equation (E1). ##EQU1## (E: the Young's modulus of the pipe, I: a cross-sectional secondary moment of the pipe, Si: a cross-sectional area of the hollow portion of the pipe, .rho.t: a density of the pipe, St: the actual cross-sectional area of the pipe, L: the length in the axial direction of the pipe, x: a position in the axial direction of the pipe, y: a vibration amplitude of the pipe at position x, n: a number of masses added to the pipe, mk: a mass of a k-th added mass, and yk: a vibration amplitude of the k-th added mass).
REFERENCES:
patent: 3080750 (1963-03-01), Wiley et al.
patent: 4680974 (1987-07-01), Simonsen et al.
patent: 4801897 (1989-01-01), Flecken
patent: 4803867 (1989-02-01), Dahlin
patent: 5005400 (1991-04-01), Lew
patent: 5024104 (1991-06-01), Dames
patent: 5054326 (1991-10-01), Mattar
patent: 5115683 (1992-05-01), Pratt
patent: 5295084 (1994-03-01), Arunachalam et al.
patent: 5321991 (1994-06-01), Kalotay
patent: 5331859 (1994-07-01), Zolock
patent: 5373745 (1994-12-01), Cage
patent: 5381697 (1995-01-01), Van Der Pol
patent: 5398554 (1995-03-01), Ogawa et al.
patent: 5448921 (1995-09-01), Cage et al.
patent: 5469748 (1995-11-01), Kalotay
patent: 5497665 (1996-03-01), Cage et al.
Enoksson P. et al., Fluid Density Sensor based on Resonance Vibration. Sensors and Actuators A 46-47, pp. 327-331 (1995).
Kishiro Masami
Yao Hironobu
Chilcot Richard
Fuji Electric & Co., Ltd.
Thompson Jewel V.
LandOfFree
Vibration type measuring instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vibration type measuring instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vibration type measuring instrument will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-654746