Method and apparatus for discriminating ultrasonic echoes using wavelet function processing
Patent 6397679 Issued on June 4, 2002. Estimated Expiration Date: 
March 30, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 30, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesWavelet transform implemented classification of sensor data Time and polarization resolved acoustic microscope Method of signal compression Structure safety inspection Patent #: 6192758 InventorsAssigneeApplicationNo. 539153 filed on 03/30/2000US Classes:73/596, Beamed73/602With signal analyzing or mathematical processingExaminersPrimary: Kwok, HelenAttorney, Agent or FirmInternational ClassG01N 029/24AbstractA method of and apparatus for discriminating among ultrasonic echoes reflected from various objects in a tank containing liquid is disclosed. Ultrasonic signals are generated from an ultrasonic transducer into liquid contained in a tank. Ultrasonic echoes are received by the transducer from various objects in the tank including a surface of the liquid in response to the generated ultrasonic signal and are converted into electrical echo signals representative thereof. Data samples of the electrical echo signals are generated and processed by a signal processor using wavelet function processing to generate wavelet coefficients thereof in a wavelet domain. The wavelet coefficients of the echo data samples are used to discriminate the ultrasonic echoes reflected from the various objects in or part of the tank. In one embodiment, echoes reflected from the liquid surface are discriminated from echoes reflected from other objects based on the wavelet coefficients of the echo data samples of each. In another embodiment, energy of each of the ultrasonic echoes determined from the wavelet coefficients thereof is used to discriminate the ultrasonic echoes from the various reflective surfaces.Field of SearchBeamedVelocity or propagation time measurement For flaw or discontinuity detection Attenuation measurement For flaw or discontinuity detection With signal analyzing or mathematical processing Imaging of discontinuity with stationary sonic transmitter By scan of a sonic receiver By Bragg diffraction By reflected wave By reflected wave Having unitary sonic type transmitter-receiver transducer Sonic wave transmitter or receiver transducer Having wave shaping means Having significant coupling means | |
