Measuring and testing – Fluid flow direction – With velocity determination
Patent
1994-08-24
1996-05-14
Chilcot, Richard
Measuring and testing
Fluid flow direction
With velocity determination
7386127, 7386131, G01F 1300
Patent
active
055157211
ABSTRACT:
A local river flow velocity measuring method and apparatus therefor comprises a flow velocity meter and a flow velocity measuring circuit, in which the flow velocity meter includes a plurality of ultrasonic vibrators mounted at the apexes A, B and C of a right angled triangle which sets a base AC, a vertical side BC and a oblique side AB, in which the distance of the oblique side AB is L, the height of the vertical side BC is h and an angle {(.PSI.BAC)=.PSI.} is .PSI., the propagation time of ultrasonic pulses from the apexes C to B is measured, and an angle .PSI.+.alpha. formed between the flow velocity vector V and the vertical side BC and an angle .PSI.-.beta. formed between the flow velocity vector V and the oblique side AB are indirectly measured, thereby calculating the resulting flow velocity.
REFERENCES:
patent: 4038870 (1977-08-01), Rotier
patent: 4391136 (1983-07-01), Perkins et al.
patent: 4552016 (1985-11-01), Suyama
patent: 4890488 (1990-01-01), Pincent et al.
patent: 5343744 (1994-09-01), Ammann
patent: 5373736 (1994-12-01), Brown
Chang Hak S.
Kim Soo D.
Park Kyung A.
Changmin Technology Co., Ltd.
Chilcot Richard
Dougherty Elizabeth L.
Keschner Irving
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