System for multiplexing and transmitting ultrasonic signals by means of optical fibre

摘要

System for multiplexing and transmitting ultrasonic signals by means of optical fibre. Process for optical multiplexing and transmission of the electrical signals generated by piezoelectric transducers functioning as ultrasonic-echo receivers, by means of the use of optical fibre. For transmission, frequency modulation of a subcarrier is used, the subcarrier in its turn modulating the brightness of the optical source. In this way, it is possible to achieve multiplexing of various signals originating from the same number of piezoelectric sensors, and the signals can be transmitted on a single fibre for subsequent demultiplexing and study.