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The Design of the Ship-Borne Node Hardware of Underwater Acoustic Remote Control System

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Tutor: WangYan
School: Harbin Engineering University
Course: Underwater Acoustics
Keywords: underwater acoustic remote control,signal receiver,embedded technique,transmitte
CLC: TN912.3
Type: Master's thesis
Year:  2012
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Abstract:
As we have gone further and further in the exploitation of the ocean, the underwateracoustic remote control systems play a crucial role in many underwater operations. Thisdissertation aims to complete the node hardware design of underwater acoustic remotecontrol system of ship-borne. This work is mainly divided into the following three parts:1.The design of the signal receiver of the ship-borne node hardware of underwateracoustic remote control system has been completed. The main function of the signalreceiver is to make the conversion of acoustic signals in aqueous media to electrical signalsby hydrophone, while making completion of the amplification, filtering, preprocessing andproviding the pure signals with a certain amplitude for the subsequent processing. Theamplification and emitter follower circuit are constituted with OPA2376components indetail; the band-pass filter is made of the active filter components MAX274; theoptocoupler isolation circuit is built up with the linear optocoupler components HCNR200.2. The hardware design of the remote control system of underwater acoustic digitalsignal processing platform is finished. Digital signal processing platform is the hub of theentire system, and also provides a hardware foundation for a variety of signal processingalgorithms. In this paper, the author complete the design of the interface of the OMAP-L137and the peripheral circuit, including the design of the digital to analog conversion circuitwhich is based on3AIC3254s and the design of the Ethernet interface and serial circuit andthe design of the overall power module.3.The design of the power amplifier circuit and matching network of the underwateracoustic transmitter has been completed. The energy of the signals generated by digitalsignal processing platform is too low to drive the underwater acoustic transducer directly toradiant acoustic signals to the aqueous medium, so it is necessary to zoom it by theamplifier circuit. The OPA541amplifier tube to be the main components of a B poweramplifier circuit is selected based on the actual situation. And the design of the matchingnetwork which connect the power amplifier circuit to the transducer load is finished basedon the underwater acoustic transducer impedance curve.After completing the circuit design, the debugging through which to ensure therealization of the functions is finished.
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