Design And Realization Of Cooperative Acoustic Beacons System For Targeting Vector

There are a lot of natural resources in the ocean,in modern marine development,people usually complete the designated marine development tasks by underwater vehicle equipped with acoustic,optical equipment.Due to the particularity of the water,sound waves are the only efficient way for long-distance underwater information transmission.Underwater acoustic technology is one of the most efficient methods to transmit and acquire underwater information.Underwater positioning and navigation technology is a technology for locating the underwater targets by sound waves.The research of this thesis complete the hardware circuit design and software program of the acoustic beacon system according to the working environment and characteristics of the target carrier cooperative acoustic beacon.The target carrier cooperative acoustic beacon consists of three parts: the transmitting transducer,the acoustic beacon electronic cabin and the control unit.The control unit realized the electronic management and electrical status checks of the acoustic beacon electronic cabin.The target carrier can provide the overwater array unit and ultrashort baseline positioning unit with the acoustic signals stably in underwater motion.And the ultrashort baseline positioning unit can obtain the motion information of the target carrier through processing the collected data.For the control unit,in this thesis,design the hardware platform used the MSP430F6638 microcontroller as the processing core,together with the circuit modules such as the peripheral serial communication circuit and the trigger circuit and realize the necessary functions of the control unit by means of programming.Through the simulation of coding,modulation,demodulation,decoding of IRIG-B AC code,verify the decoding scheme is feasible in theory.To migrate the decoding scheme to hardware platforms,realize the decoding of IRIG-B AC code and the time bias of the correct time.For all functional requirement of the acoustic beacon electronic cabin,design the hardware platform used the TMS320VC5509 as the processing core,together with D-type power amplifier circuit as the peripheral circuit modules.Realize the function by means programming,such as control of the working model of transducer,the self-checking of the transmitter,management of the battery supply,operating voltage and ambient temperature monitoring.Consider the work environment of the acoustic beacon system and operation mode of the transducer,optimized the installation of the acoustic beacon electronic cabin and transducer.Finally,conduct the function test of the each module of the target carrier cooperative acoustic beacon,and obtain the contextual test data.Through the analysis of the test data,the system is optimized in hardware and software,realize the system's stable and reliable work,and the design of the acoustic beacon system reached the anticipated target.