Impedance matching system suitable for marine communication electroacoustic transducer, and matching method thereof
An electroacoustic transducer and impedance matching technology, which is applied in the direction of frequency/direction characteristic devices, etc., can solve the problems of less research on magnetostrictive impedance matching methods, achieve long-term safe operation, improve energy conversion efficiency, well-matched effect
Active Publication Date: 2018-11-23
HUNAN UNIV
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[0009] Traditional piezoelectric transducers usually use series and parallel inductors and capacitors for impedance matching. In electroacoustic communication systems, the impedance of the transducer varies with the resonant frequency within the frequency band. The traditional impedance matching circuit of the transducer cannot complete the conversion. The impedance matching between the transducer and the signal source in the entire frequency band, and there is less research on the magnetostrictive impedance matching method
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[0029] refer to figure 1 , the magnetostrictive marine communication electroacoustic transducer is always an inductive load near the resonant frequency, so it can be equivalent to figure 1 The resistor R shown eq Inductance L eq Simplified circuit in series, and its no-load value R eq_0 and L eq_0 It can be measured by an impedance measuring instrument, the value R of the load eq_m and L eq_m It is obtained in real time by the digital processor DSP.
[0030] refer to figure 1 The shown magnetostrictive type marine communication electroacoustic transducer impedance matching system circuit diagram is the main circuit diagram of the magnetostrictive type marine communication electroacoustic transducer according to the present invention, including a power amplifier, a matching transformer, an impedance matching network and Transducer Equivalent Network. The power amplifier, the matching transformer, the impedance matching network and the simplified equivalent circuit of th...
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The invention discloses an impedance matching system suitable for a marine communication electroacoustic transducer, and a matching method thereof. The impedance matching system comprises a precedingstage power amplifier, an impedance matching network, a magnetostrictive transducer equivalent circuit and an impedance matching cooperative control system, the impedance matching network and the preceding stage power amplifier perform cooperative control, and static matching and dynamic matching are combined to achieve good matching of the transducer. Compared with the traditional static matching, the impedance matching network proposed by the invention for the marine communication electroacoustic transducer can measure an equivalent resistance value and an inductance value of the transducerin real time under the condition that the working environment of the transducer changes and the load changes to achieve dynamic matching, and track the resonance frequency by detecting the peak valueof the equivalent resistance of the transducer, improve the electroacoustic conversion efficiency of the system, and reduce the heat generation of the transducer; and compared with the traditional dynamic matching, the impedance matching system greatly reduces the capacity of a binary capacitor array and improves the precision, thereby improving the matching effect.
Description
technical field [0001] The invention relates to the field of marine communication transducers, in particular to an impedance matching system and a matching method suitable for marine communication electroacoustic transducers. Background technique [0002] Acoustic wave is an effective tool for target detection and information transmission in seawater. Marine communication technology is to use sound waves as information carriers to detect and locate underwater targets and realize underwater mutual communication. As an important part of the marine communication system, the electroacoustic transducer is the key equipment to realize electroacoustic energy conversion. Therefore, improving the performance of the electroacoustic transducer and developing marine communication technology are important guarantees for safeguarding marine rights and interests and ensuring national security. [0003] As a key device for mutual conversion of electrical energy and acoustic energy, electro...
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IPC IPC(8): H04R1/28
Inventor 罗安杨均权杨苓王逸兴欧素妤宁倩韩旭
Owner HUNAN UNIV
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