WATER TURBULENCE DETECTOR
Assignee
Filed
Sep 17, 1971
Granted
Aug 27, 1996
Location
ADELPHI MD US
Abstract
A Doppler shift flow meter array detects turbulence in the wake of a submne. Three sets of transmitting and receiving sonic transducers are spaced in a line on a rigid support. The transmitting transducers emit ultrasonic energy which is reflected from particulate matter in a surrounding water medium. The reflected energy is detected by the receiving transducers. A digital Doppler meter associated with each set of transmitting and receiving transducers develops a digital count over a fixed interval that is equal to the Doppler shift between transmitted and received energy. First differences between adjacent pairs of digital Doppler meters are obtained by two digital subtractors, and the second difference between Doppler shifts is obtained by a third digital subtractor. The second difference is non-zero only when ocean turbulence is present, such as produced by a submarine.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Dec 18, 1981
Rescinded
Feb 22, 1996
Duration
14 years, 2 months
Inventor
- 1ABRAHAM SILVERSTEIN
Record Details
- Patent number
- US 5550789
- Application
- 05181607
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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