Underwater sound awakening circuit

Abstract

The invention provides an underwater sound awakening circuit. A receiving transducer converts the sound signal into an electric signal; the circuit works according to a method which comprises the following steps: inputting the electric signal into a wake-up circuit module, amplifying the electric signal through a pre-amplification circuit, filtering out a signal with a target bandwidth through a band-pass filter, demodulating the signal by using a detector, dividing the demodulated wake-up signal into two paths, outputting one path to a CPU of a node, and performing sampling and digitalizing through analog-to-digital conversion; and judging whether the other path of signal is a wake-up signal through a detector. According to the invention, an on-demand dormancy mechanism is realized; the data-free active time is reduced; according to the circuit, the dormancy time of the nodes is prolonged, so that the node energy consumption of a communication system can be reduced, the chip cost is relatively low, the implementation cost of a circuit is reduced, the underwater nodes can be awakened under different transmission distances, and the method has important value and significance especially for realizing remote awakening of an underwater platform.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic communication, in particular to a wake-up circuit in an underwater acoustic environment, which is suitable for communication and network node systems in an underwater acoustic environment. Background technique [0002] There are abundant resources in the ocean, and the realization of ocean observation, resource exploration and development is one of the most concerned issues of all oceanic countries. In recent years, underwater acoustic communication and underwater acoustic network have made great progress due to the continuous expansion of marine information applications, and have important applications in marine military, marine environment and meteorological research, and marine resource development. [0003] However, an important problem with communication and network nodes in underwater acoustic environments is that the energy of nodes is limited, and since nodes are powered by bat...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the shortcomings of the poor portability of the wake-up circuit in the existing method, the present invention proposes a communication and network node wake-up circuit for underwater acoustic environments, and provides a wake-up circuit with a wide range of applications, low cost, and low power consumption.

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