Patent Number: 8,869,624

Title: In-situ monitoring device and method to determine accumulated printed wiring board vibration stress fatigue

Abstract: A monitoring system includes a calibrated micro-electro-mechanical structure (MEMS) matrix in communication with a controller. The MEMS matrix includes MEMS elements of various sizes which create a continuum of vibration-stress-resistant elements. The MEMS elements will flex in response to flexing of a printed circuit board due to mechanical vibration until failure occurs. The controller monitors the continuity of the MEMS matrix to determine which elements of the MEMS matrix have failed to accurately determine the accumulated vibration stress experienced by the printed circuit board.

Inventors: Schnetker; Ted R. (Rockford, IL), Cooney; Robert C. (Janesville, WI)

Assignee: Hamilton Sundstrand Corporation

International Classification: G01B 7/16 (20060101)

Expiration Date: 2018-10-28 0:00:00