The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2008
Filed:
Sep. 28, 2006
Wonkyu Moon, Kyungsangbuk-do, KR;
Haksue Lee, Kyungsangbuk-do, KR;
Wonkyu Moon, Kyungsangbuk-do, KR;
Haksue Lee, Kyungsangbuk-do, KR;
Postech Foundation, Kyungsangbuk-do, KR;
Postech Academy Industry Foundation, Kyungsangbuk-do, KR;
Abstract
A multiple resonances type ultrasonic transducer for a ranging measurement with high directionality using a parametric transmitting array in air, includes an ultrasonic actuator unit formed with a regularly mixing array of first unit actuators having a resonance frequency of fand second unit actuators having a resonance frequency of fThe ultrasonic actuator unit generates a difference frequency wave (f=f−f) with high directionality by forming a parametric transmitting array in air through generating two ultrasonic waves with high pressure in air. Further, the transducer includes an ultrasonic sensor unit formed with one or more unit sensors having a resonance frequency of the difference frequency (f=f−f), for sensing a reflected ultrasonic pulse signal from a target.