| 摘要 |
For testing the behavior and monitoring the health of things, a novel, simple, low cost, highly sensitive, light weight, easy to install, flexibly wired, sophisticated accelerometer senses the motion of educational structural models that demonstrate eneraction-how the world and sensors work. A modified electret microphone with a mass adhesively attached to its diaphragm is embedded in a hard rubber housing, insulating it against environmental noise and temperature changes. Residual stresses in the housing, which plugs onto and grips a post protruding from the test object, ensures intimate interface surface contact and faithful transmission of motion. Containing an internal isolation amplifier, and operating over two ordinary wires, the sensor embodies popular, ICP (integrated-circuit-piezoelectric) technology. Standard telephone cable output connectors mate with educational, data-acquisition accessories for computers.
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