Open channel flowmeter utilizing surface velocity and lookdown l

Details Open channel flowmeter utilizing surface velocity and lookdown l Open channel flowmeter utilizing surface velocity and lookdown l

1997-01-22

1998-09-22

Oda, Christine K.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

73277, G01F 166

Patent

active

058116885

ABSTRACT:
A flowmeter utilizing velocity at the surface of a fluid and lookdown level sensors is mounted within a manhole without requiring entry into the manhole by the installer. The velocity and level sensors generate first and second energy signal beams which are directed toward the same vicinity of the fluid surface which reflects the beams back to the sensors surface velocity signal representative of the velocity of scatters on the fluid surface is produced from the Doppler frequency shift between the directed and reflected first beam. This signal is modified to produce a mean velocity signal. A level signal is produced by determining the air space between the sensor and the fluid surface from the directed and reflected second beam and relating changes in the air space to changes in fluid level in accordance with the configuration of the pipe. Fluid flow can be calculated from the mean velocity and fluid level signals.

REFERENCES:
patent: 3910116 (1975-10-01), Smith
patent: 4034607 (1977-07-01), Matrig, Jr.
patent: 4125020 (1978-11-01), McClure
patent: 4145914 (1979-03-01), Newman
patent: 4397191 (1983-08-01), Forden
patent: 5198989 (1993-03-01), Petroff
patent: 5315880 (1994-05-01), Bailey

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