Acoustic-propagation-time measuring apparatus

Details Acoustic-propagation-time measuring apparatus Acoustic-propagation-time measuring apparatus

2006-02-21

2006-02-21

Lobo, Ian J. (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

C367S127000, C073S615000

Reexamination Certificate

active

07002876

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.

REFERENCES:
patent: 4200921 (1980-04-01), Buckley
patent: 5993393 (1999-11-01), Ryan et al.
patent: 6012332 (2000-01-01), Schafer
patent: 6621763 (2003-09-01), Lyon

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