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Mechanical Engineers Design Speed Bump to Diagnose Vehicle Defects

November 1, 2009

Mechanical engineers designed a technology encased in a speed bump-like structure to analyze vehicles and detect defects or damage to critical components. Their "diagnostic cleat" uses two sensors called accelerometers mounted inside the structure to measure vibrations created by the tires as the pass over the cleat. These vibrations are compared to that of an ideal vehicle's vibrations through a computer program and the output indicates if the suspension is damaged.

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WHAT CAN THE DIAGNOSTIC CLEAT DO? A diagnostic cleat outfitted with sensors can be used to check for car maintenance issues like misalignment, wheel imbalance, tire pressure, as well as other anomalies or maintenance needs. Though currently designed for use by military vehicles, it could be adopted to be used in driveways or at car dealerships for troubleshooting passenger cars.

WHAT'S AN ACCELEROMETER? A small device that measures the acceleration relative to freefall is called an accelerometer. Typically they are very small devices that help everything from smartphones to gyroscopes orient themselves in space. The simplest ones are a beam with a weight on one end, enclosed inside a capsule of gas. Moving an object with an accelerometer attached causes the beam to bend. This deflection can be converted into a measure of acceleration. These devices are used in bridges, pedometers, medical applications, amateur rocketry, and all sorts of consumer electronics.

The American Society of Mechanical Engineers and the Institute of Electrical and Electronics Engineers, Inc.-USA, contributed to the information contained in the TV portion of this report.

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To Go Inside This Science:
Douglas Adams, PhD
Purdue University
Lafayette, IN 47905
765 449 4249
deadams@purdue.edu

American Society of Mechanical Engineers
infocentral@asme.org
1-800-843-2763 or 973-882-1170

Institute of Electrical and Electronics Engineers, Inc.
IEEE
IEEE-USA
Pender McCarter
p.mccarter@ieee.org