New 3991 Series of High Amplitude 20,000 g MEMS Accelerometers
Following extensive pyrotechnic, penetration and metal-to-metal impact field testing, the Aerospace and Defence Division of PCB Pieztotronics have released a range of micro-electromechanical systems (MEMS) shock accelerometers incorporating squeeze-film damping to reduce resonant amplification during violent events by orders of magnitude over conventional undamped PR MEMS designs. Such damping greatly enhances survivability and reduces the need for filtration, whether mechanical or electrical, to block unwanted high frequency output.
Several configurations are available from surface mount packages to conventional titanium bolt down housings and a triaxial version for integration into products or field measurements. Each style shares the same air-damped acceleration sensing element, which is micro machined from silicon using the latest advances in etching techniques and equipment. This tiny element measures just 2.5 x 1.7 x 0.9 mm (lwh) and incorporates a seismic mass, protective over range stops, and a full-active, piezoresistive Wheatstone bridge.
Typical applications include penetrator tests, blast survivability investigations, weapon fusing, drop testing and high shock explosive measurements.