MEMS shock accelerometers

  • 17-Jul-2009 02:01 EDT
MEMS HighG_Shockcmyk.jpg

PCB Piezotronics’ PCB Series 3991/3501 microelectromechanical systems shock accelerometers are miniature, high-amplitude dc response acceleration sensors that can measure long-duration transient motion as well as respond to and survive extremely fast rise times typical of high-g shock events. The acceleration sensing element, which is micromachined from silicon, measures 2.5 x 1.7 x 0.9 mm and incorporates a seismic mass, protective over-range stops, and a full-active, piezoresistive Wheatstone bridge. The slight air damping reduces resonant amplification, which increases measurement accuracy, while the over-range stops enhance the sensor's survivability. Applications include safe and arm, smart fuses, penetrator tests, blast loading of structures, and drop testing.
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