Communications: electrical – Land vehicle alarms or indicators – Of relative distance from an obstacle
Reexamination Certificate
2008-02-29
2010-06-01
Pham, Toan N (Department: 2612)
Communications: electrical
Land vehicle alarms or indicators
Of relative distance from an obstacle
C340S436000, C340S438000, C340S903000, C701S301000
Reexamination Certificate
active
07728719
ABSTRACT:
A parking sensor apparatus has a microprocessor and multiple ultrasonic sensors. The microprocessor uses a time division transmitting method to control only one ultrasonic sensor to output an ultrasonic detecting signal. In addition, after one ultrasonic detecting signal is output, all ultrasonic sensor are controlled to be in receiving status. Therefore, the microprocessor receives the reflected detecting signals from the ultrasonic sensors and obtains preset distances defined between adjacent ultrasonic sensors to calculate the shortest distance between the vehicle and the obstacle. Further, since only one ultrasonic sensor outputs the ultrasonic detecting signal at a time point, the microprocessor clearly determines that the reflected detecting signal is corresponding to the present ultrasonic sensor, that is controlled to output the ultrasonic detecting signal.
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Frenkel & Associates P.C.
Pham Toan N
LandOfFree
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