Ultrasound detection device in particular for an automatically c

Details Ultrasound detection device in particular for an automatically c Ultrasound detection device in particular for an automatically c

1997-12-18

1999-07-06

Ro, Bentsu

Electricity: motive power systems

Periodic, repetitious or successive operations control of...

Variable periods or intervals between controlling operations

318483, 318DIG2, B60S 108

Patent

active

059201673

ABSTRACT:
A detection device has a transducer (10) for emitting and receiving series of ultrasonic pulses. An integrator (23) integrates echo signals resulting from ultrasonic pulses within a time window so as to produce an integral value. A time-delay circuit (28) is used to control the instant of opening T1 of a time window and a control circuit (25) determines an average value of a number of n integral values and for loading the values of the opening a instant T1 into the time-delay circuit (28) so as to maintain the average value at a steady value. The control circuit (25) determines the average value by loading a first value of T1 in the time-delay circuit before the integration of the first x echo signal and a second value of T1 in the time-delay circuit before the integration of the second n-x echo signals.

REFERENCES:
patent: 4180886 (1980-01-01), Scherz
patent: 4768256 (1988-09-01), Motoda
patent: 5266873 (1993-11-01), Arditi et al.
patent: 5432415 (1995-07-01), Ittah et al.

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