Ultrasonic sensor and method for determining a separation of...

Details Ultrasonic sensor and method for determining a separation of... Ultrasonic sensor and method for determining a separation of...

2011-06-07

2011-06-07

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

C073S602000

Reexamination Certificate

active

07954378

ABSTRACT:
The invention relates to a method for determining a separation, spacing or distance of an object from an ultrasonic sensor, in which ultrasonic pulses are emitted by a transducing or sensing element and in which ultrasonic pulses reflected by the object are detected by the same transducing element. According to the invention, the method is characterized in that there is a spectral analysis of the signal detected by the transducing element, that the multiple echo frequency attributed to multiple echoes of the ultrasonic pulses is determined in the spectrum of the detection signal and that on the basis of the multiple echo frequency the separation of the object from the ultrasonic sensor is determined. The invention also relates to an ultrasonic sensor for determining the separation of an object.

REFERENCES:
patent: 5197019 (1993-03-01), Delon-Martin et al.
patent: 5923282 (1999-07-01), Honma et al.
patent: 6345683 (2002-02-01), Gordon et al.
patent: 42 04 414 (1993-06-01), None
patent: 0 705 444 (1997-03-01), None
patent: 1 460 396 (2004-09-01), None
patent: WO 96/24027 (1996-08-01), None
patent: WO 01/46653 (2001-06-01), None
European Search Report No. EP 07 00 2623, Completion Date Apr. 24, 2007.

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