Sensing Systems' Endevcomodel 7240C is a miniature
piezoelectric accelerometer with low bandwidth flat to 30 kHz was designed for
general purpose high-frequency vibration measurements.
Endevco model 7240C
offers low base strain sensitivity with a total package weight of 4.8 gm,
eliminating mass loading concerns. The unit is hermetically sealed to prevent
against environmental contamination and is a self-generating device which
requires no external power source for operation.
Signal ground of the Endevco
model 7240C is connected to the outer case of the unit. When used with one of
the supplied isolated mounting studs, the accelerometer is electrically
isolated from the ground. A specially designed low-noise coaxial cable is also
supplied for error-free operation. The sensor is for use within a variety
of automotive, aerospace, commercial aviation, general laboratory testing and
structural monitoring applications.
Two different shape-shifting polymers have been announced from two different universities: Wyss Institute at Harvard University and Zhejiang University in eastern China. Both of them change their shapes when immersed in water, and the one from Wyss Institute was made with 3D-printing techniques.
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