摘要
无线传输由于其具有灵活的传输特性,可实现低成本、高效率的信号传输,规避传统电磁传输设备的传输局限性。针对目前无线传输设备,如电磁传输设备以及以光波为载体的光通信传输设备,无法在海水以及液体等介质中实现数字、语音信号的无线远距离传输。首先,提出了采用超声波作为传输信息方式,可实现水下、金属等液体以及固体中进行信号传输。其次,利用换能器的载频特性通过调频的方式设计出了调制电路,利用不同特性的超声波换能器并在不同介质中做了音频信号传输。本文提出了超声波语音传输系统发射端的设计实现方案,利用超声换能器的电/机械效应产生载频在1~4 Mz的机械波信号,进行了在不同介质中的音频信号传输。
Because of its flexible transmission characteristics, wireless transmission can realize low-cost and high-efficiency signal transmission, avoiding the transmission limitations of traditional electromagnetic transmission equipment. For the current wireless transmission equipment, such as electromagnetic transmission equipment and optical communication transmission equipment using light waves as the carrier, it is impossible to realize the wireless long-distance transmission of digital and voice signals in media such as sea water and liquid. First of all, it is proposed to use ultra-sound as a method of transmitting information, which can realize signal transmission in liquids and solids such as underwater and metal. Secondly, the modulation circuit is designed by frequency modulation using the carrier frequency characteristics of the transducer, and the ultrasonic trans-ducers with different characteristics are used to transmit audio signals in different media. This paper proposes the design and realization of the transmitting end of the ultrasonic voice transmission system, which uses the electrical/mechanical effect of the ultrasonic transducer to generate mechanical wave signals with a carrier frequency of 1~4 Mz, and carries out audio signal transmission in different media.
出处
《计算机科学与应用》
2021年第11期2752-2761,共10页
Computer Science and Application
