| 摘要 |
A keyless entry system and sensor for unlocking the door locks of a vehicle. The sensor, preferably in the form of a piezoelectric crystal, is secured at a discrete location to an inner concealed surface of a body panel of the vehicle and electrically connected to an electronic signal processing module having an output relay. The output relay is electrically connected with the power control relay of the door lock, the sensor being structured to afford entry into a locked vehicle by sharply tapping the outer surface of the body panel at the exact location and limited area where the concealed sensor has been discretely secured. The system and sensor thus provides access to a vehicle that does not require the owner to carry a battery powered transmitter or rely on memorizing a numerical code.
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