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US 4,782,697 AGranted
Acoustic current meter
OwnerAlbert J. Williams, 3rdinventor
Life of this patent
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Abstract
An acoustic travel time flow meter, for use in measuring turbulent vector flow data, capable of extended deployment in which acoustic pulse generation and measurement are interleaved to conserve battery power and compressed data, sufficient to reconstruct turbulent flow data, are derived from instantaneous measurements to conserve data storage. Transmitter output and receiver input impedances are matched to reduce instrument error.
Claims5
An acoustic travel time current flow meter comprising:
- means for making instantaneous measurements of turbulent vector flow in ocean currents near the ocean floor;
- means for deriving compressed data therefrom for each of a series of averaging periods sufficient to reconstruct turbulent flow energy and Reynolds stress data;
- and
- means for recording the compressed data for reconstruction after recovery of the meter from the ocean.
1 more element
An acoustic travel time current flow meter comprising:
- battery powered means for sequentially generating and measuring acoustic pulses in the ocean;
- means for measuring a plurality of the acoustic pulses during measurement intervals;
- means for deriving compressed data therefrom for each of a series of averaging periods sufficient to reconstruct turbulent flow energy and Reynolds stress data;
- means for recording the compressed data for reconstruction after recovery of the meter from the ocean, and
- means for conserving battery power between the measurement intervals.
2 more elements
Dependencies are inferred from the claim text.