Search Results - nizar lajnef

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Methods for Estimating Remaining Life of a Monitored Structure

Executive SummaryUnderstanding how structures are deteriorating over time is critical to preserving safety and functionality while establishing a cost effective maintenance program. Recently, self-powered sensors have been developed for sensing fatigue in mechanical structures. It is desirable to develop robust data interpretation techniques that are...
Published: 6/24/2016   |   Inventor(s): Nizar Lajnef, Mohamed Rhimi
Keywords(s):   Category(s): Data Processing/Analysis, Materials, Test and Measurement

Energy Harvesting Devices for Low Frequency Applications

Executive SummaryOne of the major obstacles limiting the development of deployable integrated sensing and actuation solutions in smart structures is the scarcity of power. As the power consumption, speed and size of integrated circuits decrease it becomes increasingly feasible to embed electronics in everyday objects to enhance their performance.  Current...
Published: 6/21/2016   |   Inventor(s): Rigoberto Burgueno, Nizar Lajnef
Keywords(s):   Category(s): Devices, Energy

Quasi-Static Self-Powering, Sensing, and Data Logging

Executive SummarySlowly acting events can be very difficult to sense, especially for self-powered sensors.  Most sensors require an external energy source in order to detect the desired property and report results. For some applications however, a self-powered sensor is desirable that uses energy from the object being sensed in order to record the data....
Published: 6/15/2016   |   Inventor(s): Nizar Lajnef, Shantanu Chakrabartty, Rigoberto Burgueno, Borchani Wassim
Keywords(s):   Category(s): Devices, Test and Measurement, Mechanical

Method and Apparatus for Autonomous Self-Powered Integrated Piezo-Floating Gate Sensors

IntroductionEach year, hundreds of thousands of hip and knee replacement surgeries are performed in the United States. Most of these prosthetic implants are expected to last for at least 20 years after which revision and replacement surgery will be required. In many cases, however, excessive wear and loosening of artificial joints leads to joint swelling,...