Browsing International Telemetering Conference Proceedings, Volume 43 (2007) by Subjects
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DEVELOPMENT, EVALUATION AND IMPLEMENTATION OF A SURFACE-MOUNT, HIGH-G ACCELEROMETERThe Endevco model 7270A high-g accelerometer has been used successfully in numerous flight tests at the U.S. Army Research Laboratory. The accelerometer is available in ranges as low as 6,000 g’s up to 200,000 g’s so they can be used in a variety of situations to measure setback, set forward and balloting in artillery rounds, mortars and tank projectiles to name a few. However, one of the disadvantages of the model 7270A is its physical size, in the era of die level and surface mount components, the 7270A is relatively large. The sensing element is packaged inside a metal case with screw holes for mounting to a rigid surface. In addition, there are wires protruding from the case for electrical connections. In the area of munitions, small cavities don’t always afford the room for a large gauge. It was desirable to repackage the die in a smaller container and make it a surface mount component for a printed circuit board. A contract was developed for Endevco to repackage the die and to develop a tri-axial version with the repackaged die. The newly developed accelerometers were tested and evaluated by the U.S. Army Research Laboratory.
EVALUATION OF COMMERCIAL-OFF-THE-SHELF LITHIUM BATTERIES FOR USE IN BALLISTIC TELEMETRY SYSTEMSAs technological advances continue to be made in the commercial sectors of portable and wireless communication products, additional advancements in battery technology have also been made. These advancements have allowed for the rapid growth of a large variety of commercially available batteries which have the capability to meet or even exceed the current power and size requirements for numerous ballistic telemetry systems. The replacement of a custom built battery with a COTS battery would provide immediate advantages such as lower cost, shorter lead times and higher availability. The overall objective of this paper is to provide ballistic telemetry systems engineers and designers with multiple low cost, readily available alternatives to traditional custom made power sources.