Underwater acoustic communication module and method and underwater wireless sensor network node device

Abstract

The invention discloses an underwater acoustic communication module and method and an underwater wireless sensor network node device. The underwater acoustic communication module comprises a digital signal processor, a digital-to-analog converter, an analog-to-digital converter, an ultrasonic transducer and a hydrophone. The hydrophone is used for acquiring an underwater ultrasonic signal and converting the underwater ultrasonic signal into a first analog signal; the analog-to-digital converter is used for converting a first analog signal into a first digital signal, and the digital signal processor is used for performing digital orthogonal coherent demodulation modulation, medium access control or routing cross-layer underwater acoustic communication processing on the first digital signalto obtain a second digital signal; The digital-to-analog converter is used for converting the second digital signal into a second analog signal; And the ultrasonic transducer is used for converting the second analog signal into an ultrasonic signal and transmitting the ultrasonic signal into water. According to the underwater acoustic communication module, the underwater acoustic communication method and the underwater wireless sensor network node device, a cross-layer underwater acoustic communication function can be realized without a complex hardware circuit.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to an underwater acoustic communication module, a method and an underwater wireless sensor network node device. Background technique [0002] Since the last century, that is, the 20th century, the research on underwater wireless sensor networks has begun to rise at home and abroad, and underwater acoustic communication technology has also been applied to it and has gradually developed and matured. Underwater wireless sensor network technology is a multi-disciplinary technology, which involves communication, electronics and computer technology, and is undoubtedly one of the most influential technologies in this era of IT technology. In underwater wireless sensor networks, thousands of underwater acoustic wireless sensor nodes are usually randomly deployed in three-dimensional underwater areas that are difficult for humans to reach. They form a multi-diving underwater...

AI Technical Summary

Problems solved by technology

The inventive scheme is reasonable and feasible, but has the disadvantages of single FSK modulation and demodulation function, poor scalability, etc.

In addition, Chen Yan and others proposed a multi-purpose underwater acoustic modem in the literature [1], and realized the underwater acoustic modulation and demodulation function through the ADSP-BF533 chip running the modulation and demodulation program, which can improve the FSK modulation and demodulation of the above-mentioned inventive device. Disadvantages of single tuning function and difficulty in expansion

([1] Chen Yan, Zeng Juan, Du Lijun, etc. Underwater Acoustic Modem Based on ADSP-BF533. "Acoustic Technology", 2008.) At present, the existing underwater acoustic communication equipment on the market still has high price and high power consumption. , The disadvantage of low integration, can not achieve large-scale underwater applications and long-term battery support work, and for cross-layer underwater acoustic communication functions such as routing, MAC, modulation and demodulation, complex hardware circuits must be required to achieve

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