US 7,002,876 B2Granted

Acoustic-propagation-time measuring apparatus

AssigneeKabushiki Kaisha Toshiba

InventorsMasafumi Komai, Satoshi Nagai, Takehiko Suzuki

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Abstract

An acoustic-propagation-time measuring apparatus includes an acoustic transmitting and receiving section having an acoustic element capable of transmitting and receiving acoustic waves, an A/D converter which converts an echo signal reflected from a target object to be measured into a digital signal, an inverse-analysis section that converts the digital echo signal into an impulse signal through inverse analysis where the digital echo signal is multiplied by an inverse matrix, a calculating section that measures an acoustic propagation time and a time difference based on the digital echo signal converted to the impulse signal, and a display section which displays the acoustic propagation time and time difference calculated by the calculating section.

Claims11

Dependent claims

An acoustic-propagation-time measuring apparatus comprising:

an acoustic receiving device having at least one acoustic element capable of receiving a transmitted acoustic wave;
an A/D converter for converting an acoustic receiving signal to a digital echo signal, the acoustic receiving signal being reflected from a target object to be measured and received by the acoustic element of the acoustic receiving device;
an inverse-analysis device for carrying out inverse-analysis processing of multiplying the digital echo signal by an inverse matrix to convert the digital echo signal into an impulse signal;
a calculating device for calculating an acoustic propagation time and a time difference of the acoustic receiving signal in response to the impulse signal produced by the inverse-analysis device;
and
a display device for displaying the acoustic propagation time and the time difference calculated by the calculating device.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/896,902Filed 23 Jul 2004
Priority: JP 2003-20199225 Jul 2003
Published: US 2005/0018539 A127 Jan 2005
Granted: 21 Feb 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G01N 29/069
Imaging: defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT],…
G01N 29/07
Analysing solids: by measuring propagation velocity or propagation time of acoustic waves
G01N 29/449
Processing the detected response signal , e.g. electronic circuits specially adapted therefor: statistical methods not provided for in…
G01N 29/52
Processing the detected response signal , e.g. electronic circuits specially adapted therefor: using inversion methods other that spectral…