Ultrasonic distance measurement method and device by...

Details Ultrasonic distance measurement method and device by... Ultrasonic distance measurement method and device by...

2005-01-18

2010-02-23

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

Reexamination Certificate

active

07668045

ABSTRACT:
The present application discloses a method of and an apparatus for measuring a distance using an ultrasonic wave. The method of measuring a distance using an ultrasonic wave includes the steps of receiving through an ultrasonic sensor a signal from an ultrasonic transmitter; amplifying the received signal; filtering a high-frequency component from the amplified signal, thereby generating a filtered signal; generating an output signal when the filtered signal satisfies a predetermined condition; and computing a distance based on a period of the output signal.

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patent: WO 98/26309 (1998-06-01), None
patent: WO 2005083463 (2005-09-01), None

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