Non-crosstalk ultrasonic ranging system excited using chaotic sine frequency modulated sequences

Traditionally, most ultrasonic ranging systems are excited using pulse signals. A hardware platform of ultrasonic ranging system that is excited using a sine signal is presented. On the basis of the new hardware platform, the chaotic sine frequency modulation (CSFM) sequence is proposed to excite ultrasonic transducers. Correlation characteristics of the echo signals generated using the CSFM excitation sequences are analyzed, and the feasibility of using the CSFM sequence to eliminate ultrasonic crosstalk is validated. Preliminary experiments show that the proposed CSFM sequences could meet the requirement of non-crosstalk ultrasonic ranging systems.