Method and apparatus for measuring water velocities and discharges in rivers and the like
OwnerWolfgang Stedtnitzinventor
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Abstract
An improved method of measuring the flow velocity of water bodies, characterized in that, in addition to a principal direct path along which acoustic signals are propagated across and through the direction of flow of water, an auxiliary indirect path for acoustic signals is utilized comprising two segments of an acoustic signal reflected at a water-air or water-ice boundary of said body of water.
Claims10
An improved method for measuring the flow velocity of water bodies, characterized in that, in addition to a principal direct path along which acoustic signals are propagated across and through the direction of flow of water and propagation times along opposite directions are measured, said direct path is inclined with respect to said direction of water with an acute azimuth angle, there is an auxiliary indirect path for acoustic signals, which is likewise inclined and similarly but separately utilized as said direct path, comprising two segments of an acoustic path reflected at a water-air or water-ice boundary of said body of water, whereby effective cross-section area of waterflow is determined.
An improved method for measuring flow velocity of water bodies based on the measurement of transit times of ultrasonic pulses traveling in opposite directions, characterized in that, in addition to a principal path between a first and a second transducer, which runs almost horizontally and with an azimuth angle between 5 degrees and 50 degrees relative to the direction of the main stream, a second path is utilized comprising two segments above said principal path:
- a first segment from said first transducer to a reflection point at the boundary water-air or water-ice;
- and a second segment from the reflection point to said second transducer, said first and second segments are utilized to measure transit times of ultrasonic pulses traveling in opposite directions therealong independently of transit time measurement along said principal path.
Dependencies are inferred from the claim text.