Development Of Hardware For Underwater Acoustic Transceiver System Of Multiple Buoy Positioning

“The underwarter acoustic transceiver system of multiple buoy positioning” is a working device for transmitting acoustic signals and receiving acoustic signals under warter in a long baseline positioning system.The system is responsible for three-dimensional positioning of underwater targets equipped with a beacon.The beacon system needs to realize the acquisition of the depth information of the underwater target,the generation of the modulation signal and the transmission of the modulation signal;and the function of the buoy is mainly the acquisition of the original signal and the processing of the data.The content of this thesis focuses on the design and implementation of positioning beacons and buoy circuit.The thesis first introdces the three-dimensional positioning scheme and designes the modulated positioning signal.Combined with the transducers used in the transceiver system and sonar equations,the thesis demonstrates and analyzes the relevant parameters,and proposed technical indicators of the beacon and buoy.The second part of the thesis discusses the design of the beacon circuit,focusing on the power amplifier circuit,the MOS tube drive circuit,the MOS tube protection circuit,and the auxiliary circuit of the beacon.The design process of the transformer and matching circuit is discussed in detail according to the characteristics of the project.At the same time,in order to obtain high-quality transmission signals,the source signal generation uses Delta-Sigma modulation technology.The third part of the thesis mainly designs the buoy conditioning circuit,gain control circuit,A / D conversion circuit and digital processing platform,and proposes a low-noise optimization design scheme based on the characteristics of the buoy circuit.At the same time,the drivers of the related device are written and simulated,and the correctness of the drivesr is verified through laboratory debugging tests.At the end of the thesis,experiments both in the laboratory and the pool are carried out for the designed transceiver system.The static power consumption of the beacon,the efficiency of the transmitting circuit,and the level of the transmitting sound source are measured.At the same time,the static power consumption and zero-input equivalent noise of the buoy circuit and the bandwidth are also measured.The measurement results preliminarily verify the correctness and feasibility of the design circuit.