Ultrasonic distance measure

Details Ultrasonic distance measure Ultrasonic distance measure

2006-05-16

2006-05-16

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

C073S609000

Reexamination Certificate

active

07046015

ABSTRACT:
An ultrasonic distance measure includes: transmitting and receiving ultrasonic transducers with changeable resonant/resonance frequencies; a driving section generating a frequency-modulated drive signal to drive the transducer and transmit an ultrasonic wave; a transmitting control voltage generating section for generating a control voltage to change the resonant/resonance frequency of The transducer and applying it to the transducer in transmitting the ultrasonic wave; a receiving control voltage generating section for generating a control voltage to change the resonant/resonance frequency of the transducer and applying it to the transducer when a controllable amount of time delay has passed since The drive signal was generated; and a receiving section for sensing the intensity of a signal received as the ultrasonic wave at the transducer.

REFERENCES:
patent: 3914987 (1975-10-01), Bickel et al.
patent: 6323441 (2001-11-01), Hager et al.
patent: 58-005099 (1983-01-01), None
patent: 61-220593 (1986-09-01), None
patent: 63-009876 (1988-01-01), None
patent: 07-104063 (1995-04-01), None
patent: 52-088013 (1997-07-01), None

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