| 摘要 |
A portable electronics distress detection system includes at least one strain gage and an alarm circuit. The strain gage is mountable to an element of the portable electronic device. The alarm circuit includes a Wheatstone bridge associated with each strain gage, with each strain gage providing a resistance input to an arm of the associated Wheatstone bridge. When a mechanical stress is imposed on the portable electronic device, the strain gage changes the resistance input to the arm of the associated Wheatstone bridge, producing a nonzero voltage output from the Wheatstone bridge. The alarm circuit activates the portable electronic device user interface if the Wheatstone bridge voltage output exceeds a predetermined set point.
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