Paul mentionmed it elsewhere -- Analog's and Memsic's accelerometers can
detect DC acceleration, in other words gravity. The Measurement
Specialty accelerometers cannot, due the piezo structure. Sometimes this
is what you want, though. It all depends on your application. A DC-bias
sensor can be used for static tilt, for example.
Don't overlook some of MSI's other products, like the omnidirectional
ultrasonic sensor, or piezeo cable. The latter makes for a good
hard-impact bumper switch.
Author: Constructing Robot Bases,
Robot Builder's Sourcebook, Robot Builder's Bonanza
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