LASER Vibration Monitoring of Unmanned Machinery

Period of Performance: 05/10/2000 - 11/10/2000


Phase 1 SBIR

Recipient Firm

RH Lyon Corp.
691 Concord Avenue
Cambridge, MA 02138
Principal Investigator


Condition Based Maintenance has been shown to be effective in reducing costs and failures compared with Preventative Maintenance. Much shipboard equipment now has either permanently mounted transducers with connections to remote pickup or are serviced by a roving system consisting of transducers and a data logger. The Navy is also moving to systems that connect to a ship's network. But it will not be cost effective to provide a dedicated connection to many small and mid-sized units that exist in ship's compartments. The solution to this problem is a single sensor and processor servicing a number of units. It is proposed here that this be done using a laser vibrometer that sequentially gathers vibration data from a group of machines by illuminating them at particular test points. The light beam is directed to a particular test point by the combination of a vibrometer rotating table and a mirror. Issues with regard to the feasibility of the system include the vibration of the vibrometer and the mirror(s) and surface contamination of the mirror(s) and the retro-reflective tape at the test point. A simulation of a test bay allows us to determine the effects of vibration, contamination, and optical alignment. Reduced manpower requirements, compatibility with LAN shipboard information systems, improved access to some machines, remote operation, download of new software for data analysis