Communications – electrical: acoustic wave systems and devices – Beam stabilization or compensation
Patent
1992-10-30
1993-09-14
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Beam stabilization or compensation
367901, 367 11, 36441325, G01S 752
Patent
active
052455866
ABSTRACT:
For suppressing reflections of an acoustic reception signal at a transmitting/receiving ultrasound transducer, the ultrasound transducer is connected to a compensation circuit which supplies the ultrasound transducer with a compensation transmission signal during reception, which has a waveform similar to the acoustic reception signal, but with a polarity opposite that of the acoustic reception signal. A summing stage is connected in a reception channel of the ultrasound transducer, the summing unit having a first input supplied with a compensated reception signal, formed by a combination of the acoustic reception signal and the compensation transmission signal. A second input of the summing unit is connected to the compensation circuit, which supplies a signal at the second input which removes the contribution made by the compensation transmission signal from the compensated reception signal, so that the output of the summing unit generates a reception signal devoided of the compensation transmission signal.
REFERENCES:
patent: 4796237 (1989-01-01), Hutchens et al.
Pihulic Daniel T.
Siemens Aktiengesellschaft
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