Measuring and testing – Vibration – By mechanical waves
Patent
1987-02-17
1988-07-19
Chapman, John
Measuring and testing
Vibration
By mechanical waves
73599, 128660, G01N 2900
Patent
active
047577150
ABSTRACT:
The present invention relates to a signal processing apparatus for quantitatively measuring ultrasonic characteristics of a medium, such as a human body and realizes the high speed quantitative measurement by processing all signals in the time domain. In the processing for eliminating an error, produced by a degree of convergence of the ultrasonic beam, a correcting function that is a function of the depth and frequency is employed. The correcting function is measured in a no-attenuation medium and converted into a form suited to the time domain processing. The function is stored and such frequency characteristics of the function are sequentially read during an actual medium measurement to control the characteristic of a variable characteristic filter to correct the received signal.
REFERENCES:
patent: 4016750 (1977-04-01), Green
patent: 4197750 (1980-04-01), Hassler
patent: 4470303 (1984-09-01), O'Donnell
patent: 4509524 (1985-04-01), Miwa
Hayashi Hajime
Igarashi Yutaka
Miwa Hirohide
Murakami Keiichi
Shiba Akira
Chapman John
Fujitsu Limited
LandOfFree
Apparatus for characterizing ultrasonic medium does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for characterizing ultrasonic medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for characterizing ultrasonic medium will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-591264