Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1980-12-24
1982-12-14
Shoop, William M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310338, 7386172, 73DIG4, H04R 1700, H01L 4108
Patent
active
043639917
ABSTRACT:
Disclosed is a method and means to increase or decrease, on demand, the drag exerted by a fluid on a boundary. The boundary comprises a surface portion of a structure enclosing a moving fluid or may comprise a portion of the outer surface of an object moving through the fluid. Drag is varied by means of a set of piezoelectric sensors and an accompanying set of piezoelectric driver elements arranged in close proximity to one another at the boundary and electrically interconnected so that the pressure exerted by the moving fluid is sensed by one or more sensors and converted to an electrical signal which is then transformed into an electrical drive signal which is applied to one or more driver elements to cause a flexing of the driver element(s) in a predetermined direction so that drag is either reduced by moving the driver(s) away from the fluid or increased by moving the driver(s) towards the fluid. In the case of turbulent flow, drag is decreased by decreasing the pressure gradient in the fluid; that is, the drivers are moved away from the fluid in regions of high pressure and toward the fluid in regions of low pressure. The drag is increased by reversing these motions.
REFERENCES:
patent: 2569987 (1951-10-01), Frondel
patent: 3745384 (1973-07-01), Blanchard
patent: 3749948 (1973-07-01), Morris
patent: 3988620 (1976-10-01), McDavid
patent: 4140936 (1979-02-01), Bullock
Shoop William M.
Wong Peter S.
LandOfFree
Drag modification piezoelectric panels does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drag modification piezoelectric panels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drag modification piezoelectric panels will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1202956