Optical Sensor for Unsteady Surface Pressure Field Mapping

Physical Sciences Inc has been awarded a research program from the US Naval Air Warfare Center, Aircraft Division, to demonstrate the feasibility of an optically-based sensor for real-time measurement of unsteady water turbulence pressure fields with high sensitivity and a large dynamic range.

The sensor is based on a fiber Bragg grating (FBG) sensing technique applicable for high-speed measurements, incorporating multiple transducers to enable spatially resolved pressure detection. The innovative detection technology relies on time-domain spectral measurements that enable high spectral resolution and time multiplexing of multiple sensing points. The design uses a unique mechanical transducer that coverts pressure to strain with a large magnification ratio for detection sensitivity and high dynamic range.

PSI’s system will provide the Navy with a much needed capability for real-time, spatially-distributed measurements of an unsteady pressure field on a turbulent water flow surface. This system will provide important data that will support improved understanding of water turbulence effects encountered during the development and operation of underwater vehicles and vessels. The capability of measuring and analyzing surface pressure fluctuations due to turbulent flow in complex configurations may have a broad impact in multiple fields of aerodynamic and hydrodynamic research.

For more information, contact:

Mr. William Kessler
Vice President, Applied Optics
Physical Sciences Inc.
Telephone: (978) 689-0003