EP0064399A2
Expired / Lapsed
EP
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Ultrasonic measuring method
Assignee: Fujitsu Ltd
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Filing: 1982-04-29
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Granted: —
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Expires: 2002-04-29
Abstract
Abstract A method for measuring physical characteristics of an object through the use of an ultrasonic wave, which comprises the steps of transmitting an ultrasonic pulse to the object. receiving a reflected wave from the object, analyzing the spectrum of a parameter representing the strength of the reflected wave and obtaining a center frequency of the spectrum to measure the physical characteristics of the object. The center frequency is used as a function of distance or time to obtain its differential or difference coefficient, or a computation similar to that for an X-ray CT is carried out. thereby to obtain an attenuation slope and so forth as the physical characteristics of the object.
Inventors
- 👤 Hirohide Miwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 03:30
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/52017; G01S7/52023; G01S7/52036; G01N; G01N29/00; G01N29/04; G01N29/11; G01N29/34; G01N29/348; G01N2291/00; G01N2291/02; G01N2291/023; G01N2291/0234
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
An ultrasonic measuring method comprising the steps of: transmitting an ultrasonic pulse into an object; receiving a reflected wave from said object; analyzing the spectrum of a parameter representing the strength of said reflected wave; and obtaining a center frequency by the analysis of said spectrum,to obtain an attenuation slope or other physical characteristics.of said object from said center frequency; wherein said center frequency is used as a function of distance or time to obtain its differential or difference coefficient, and said attenuation slope or other physical characteristics are derived therefrom.
Claim 2
Dependent Claim
91 words
An ultrasonic measuring method comprising the steps of: transmitting an ultrasonic pulse into an object; receiving a reflected wave from said object; analyzing the spectrum of a parameter representing the strength of said reflected wave; and obtaining a center frequency by the analysis of said spectrum,to obtain an attenuation slope or other physical characteristics.of said object from said center frequency; wherein said center frequency is used as a function of distance or time to obtain its differential or difference coefficient, and said attenuation slope or other physical characteristics are derived therefrom.
Claim 3
Dependent Claim
63 words
An ultrasonic measuring method according to claim 1 wherein said ultrasonic pulse transmitting step, said reflected wave receiving step and said reflected wave analyzing step are carried out a plurality of times; the spectra of the parameters representing the strength of the reflected wave thus obtained are averaged by statistic processing; the physical characteristics of said object are measured from said averaged spectrum.
Claim 4
Dependent Claim
64 words
An ultrasonic measuring method according to claim 1 wherein said ultrasonic pulse transmitting step, said reflected wave receiving step and said reflected wave analyzing step are carried out in accordance with scanning of said object; and, by analyzing the spectrum of said parameter representing the strength of said reflected wave obtained by said scanning, a distribution diagram of the physical characteristics of said object.
Claim 5
Dependent Claim
120 words
An ultrasonic measuring method comprising the steps of: transmitting an ultrasonic pulse to an object; receiving a reflected wave from said object; analyzing the spectrum of a parameter representing the strength of said reflected wave; and obtaining a center frequency by the analysis of said spectrum to obtain an attenuation slope or other physical characteristics of said object from said center frequency; wherein said ultrasonic pulse transmitting step, said reflected wave receiving step and said reflected wave analyzing step are carried out in a plurality of directions of said object; and a distribution diagram of the physical characteristics of said object is obtained by analyzing the spectrum of said parameter representing the strength of said reflected wave in each direction.
Claim 6
Dependent Claim
120 words
An ultrasonic measuring method comprising the steps of: transmitting an ultrasonic pulse to an object; receiving a reflected wave from said object; analyzing the spectrum of a parameter representing the strength of said reflected wave; and obtaining a center frequency by the analysis of said spectrum to obtain an attenuation slope or other physical characteristics of said object from said center frequency; wherein said ultrasonic pulse transmitting step, said reflected wave receiving step and said reflected wave analyzing step are carried out in a plurality of directions of said object; and a distribution diagram of the physical characteristics of said object is obtained by analyzing the spectrum of said parameter representing the strength of said reflected wave in each direction.
References Cited (Backward Citations)
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