Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Patent
1998-02-10
2000-11-21
Hoff, Marc S.
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
702 45, 7386127, G01F 100, G01F 700, G01F 166, G06F 1900
Patent
active
061515582
ABSTRACT:
Methods, devices and system for measuring the speed of the watercraft relative to the water through which it travels. An embodiment comprises two streamlined fins configured to extend at least partially below the waterline. The fins are oriented parallel to the water flow so that as the watercraft moves, the water flows in between the fins in a smooth unobstructed motion. One piezoelectric transducer is mounted in each fin so that the acoustic signal path between the transducers is a straight line. The transducers are offset upstream and downstream so that water flow between the fins can significantly affect the acoustic signal travel time between the upstream and downstream sensors.
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Conant James R
Yao Szeeming
Barbee Manuel L.
Hoff Marc S.
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