Ultrasound signal processor

Details Ultrasound signal processor Ultrasound signal processor

1995-07-03

1997-01-07

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

12866101, 367 88, 36441325, 36472413, 73626, G01N 2906, G01N 2910

Patent

active

055919111

ABSTRACT:
An ultrasound signal processor for receiving an ultrasound signal from a testing body by a plurality of electro-magnetic transducer elements and processing a plurality of received signals to obtain information of the interior of the testing body is provided with analog-digital converters for sampling at least two of received analog signals, multipliers for multiplying the outputs of the analog-digital converters by first complex digital reference signals, first low-pass filters for limiting the signal bands of the outputs of the multipliers, first complex multipliers for multiplying the outputs of the first low-pass filters by second complex digital reference signals, adders for performing the addition of the outputs of the first complex multipliers for real signals and the addition thereof for imaginary signals, memory devices for storing the outputs of the adders, second complex multipliers for multiplying signals read from the memory devices by third complex digital reference signals, and second low-pass filters for limiting the signal bands of the outputs of the second complex multipliers.

REFERENCES:
patent: 5187687 (1993-02-01), Burckhardt et al.
patent: 5231573 (1993-07-01), Takamizawa
patent: 5261281 (1993-11-01), Katakura et al.
patent: 5299576 (1994-04-01), Shiba
patent: 5349960 (1994-09-01), Gondo
patent: 5477479 (1995-12-01), Ochi
patent: 5515727 (1996-05-01), Miwa et al.

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