The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper describes design, simulation, fabrication, and testing of a miniature wind energy harvester based on a flapping cantilevered piezoelectric beam. The wind generator is based on oscillations of a cantilever that faces the direction of the airflow. The oscillation is amplified by interactions between an aerofoil attached on the cantilever and a bluff body placed in front of the aerofoil. A...
Energy harvesting is an attractive technique for powering wireless sensors and low power devices. Harvesters delivering sufficient power from rotation for sensor applications have been developed, but difficulties are encountered when the devices to be powered are located off-axis on a rotating object. In such cases, harvesters are not adapted to low frequency and high amplitude of motion, where the...
This paper presents new results in the testing and characterization of a MEMS sensor for AC electric current. The sensor is comprised of a piezoelectric MEMS cantilever with a microscale permanent magnet mounted to its free end. When placed near a wire carrying AC current the magnet couples to the oscillating magnetic field around the wire, deflecting the cantilever and generating a sinusoidal voltage...
Summary form only given. Arrays of Si PIN diodes are fielded on radiation producing experiments on the Shiva Star pulsed power generator at AFRL's Directed Energy Directorate. This work is a continuation of earlier work done on Shiva Star. Each diode is filtered to respond to a part of the band of interest and the signals are then deconvolved to generate the radiation spectrum as a function of time...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.