SONAR SYSTEM AND IMPEDANCE MATCHING METHOD THEREOF

摘要

This specification relates to an active SONAR system comprising a transmitter, a transducer and an impedance matching circuit for expanding bandwidth and increasing a power factor value in sound and ultrasonic wave bands by mutually matching resonant frequencies of the transducer and the impedance matching circuit or a resonant frequency between the transducer and the impedance matching circuit using an electrical equivalent model corresponding to actual impedance data of the transducer and controlling the positions and the intervals of the frequencies at which reactance components of the transducer including the impedance matching circuit become zero, and an impedance matching method thereof. This allows for efficient driving in a broadband between the transmitter and the transducer in the active SONAR system, contributing to output power performance and detection performance of the active SONAR system.

主权项

1. An active Sound Navigation and Ranging (SONAR) system comprising:
a transmitter modeled as an input power source and an input impedance; a transducer configured to convert an electrical signal of the transmitter into an acoustic wave or the acoustic wave into the electrical signal; and an impedance matching circuit located between the transmitter and the transducer and configured to transfer power from the transmitter to the transducer, wherein the transducer and the impedance matching circuit expand a bandwidth and increase a power factor value in acoustic and ultrasonic wave bands by mutually matching resonant frequencies of the transducer and the impedance matching circuit or a resonant frequency between the transducer and the impedance matching circuit using an electrical equivalent model corresponding to actual impedance data of the transducer and controlling the positions and intervals of frequencies at which reactance components of the transducer admittance including the impedance matching circuit become zero.