Page 47 - Winter 2008

Instrumentation
Dick Stern
Applied Research Laboratory, The Pennsylvania State University PO Box 30, State College, Pennsylvania 16804
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PCB Piezotronics (PCB®) has introduced Model 357A19, a very miniature charge output accelerometer, designed for per- forming shock and vibration studies in space-restricted locations and on small, lightweight structures. The unit occupies a 0.11x0.16x0.27inch(2.8x4.1x6.9mm) envelope, and weighs 0.007 ounces (0.20 grams), for minimal mass loading of a test article. The unit connects to laboratory- style charge amplifiers or in-line charge converters, which condition an output sig- nal for recording or analysis. Model 357A19 features an operating temperature range of -100 to +350 °F (-73 to +177 °C) and is suited for thermal cycling and vibra-
tion stress screening of circuit boards, disk drive mechanisms, mobile phones, PDA’s, and other electronic devices. Other appli- cations include NVH studies on automo- tive parts and modal analysis of small structures and satellite components. The sensor is structured with a shear mode, piezoceramic sensing element and pro- duces a 0.35 pC/g output signal, with fre- quency response of up to 20 kHz and res- onant frequency of greater than 70 kHz. Additional features include a 10,000 g shock limit, robust titanium housing, 3-56 coaxial electrical connector, and a stan- dard 10 ft. (3 m) low-noise cable.
Contact: mbakewell@pcb.com
Scantek, Inc., has announced the availability of two new prod- ucts available from Norsonic for human body vibration. The CVK HealthVib, fitted in a seat pad, measures whole-body vibrations (WBV) in three axes per ISO 2631. The CVK Vibindicator allows optional wireless data transfer from the HealthVib and allows, via colored LEDs, an indication of expo- sure and direction (axis) of significant vibration. The time pro-
file and the overall measurement results of the measured vibra- tion signals can be downloaded from VibindicatorTM to the PC. A simple display program is included. The data may also be exported to Excel. The HealthVib® is a more cost effective meas- urement solution for whole body measurements than tradition- al vibration instruments.
Contact: RPeppin@aol.com
Editor’s Note—The items printed in “Instrumentation” are reported for informational purposes only and are not necessar- ily endorsements by the Editor, Acoustics Today, or the Acoustical Society of America.
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