Apple is working on a new way to use the iPhone’s sensors. It could turn out that you don’t need MobileMe anymore. It’s a patent application that explains a feature that uses the accelerometer to detect when the iPhone is being stolen.
In a application entitled “Acceleration-Based Theft Detection System for Portable Electronic Devices,” Apple describes a system that would analyze movement via a device’s accelerometer to determine whether a theft is present. If the system were to interpret fast movement as a theft, it would initiate an alarm.

“The drive toward miniaturization of electronics has resulted in computer-based systems that are becoming much more portable,” the application reads. “Current portable electronic devices such as laptop computers, hand-held devices such as cellular telephones and personal media devices, such as the iPod from Apple Computer, Inc., and even devices such as compact disc players, are sufficiently compact and lightweight as to make them easily movable. Unfortunately, such ease of transport also implies ease of theft. While the rightful owner of a portable electronic device may conveniently transport it almost anywhere, so can a thief. “
“Typically, theft or other large-scale movement of the device results in an acceleration signal having characteristics different from other events such as shock, impact, nearby machinery, etc,” the application reads. “The detected acceleration as a function of time is thus analyzed to determine whether it corresponds to such large-scale movement of the device, rather than an innocuous event such as the impact of a book dropped nearby. If so, an alarm is produced in order to alert others to the theft.”
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