| With the continuous development and progress of Marine science,its research has received more and more attention and investment,and the importance of Marine equipment is becoming more and more obvious.Among them,as one of the important equipment in the field of Marine science,the acoustic release plays a vital role in the recovery of Marine submarine beacon system.The aim of this paper is to develop an underwater acoustic release system which is suitable for shallow sea area and has ranging function.Firstly,the working principle and remote communication principle of acoustic releaser are studied.Secondly,the measuring accuracy of LFM signal used for synchronization is analyzed for the ranging function of the releaser.At the same time,due to the curved path of sound waves in ocean channel,the ranging results will be biased.Two sound speed correction algorithms,acoustic line tracking method and effective sound speed method,are mainly studied to compensate the ranging errors caused by the above problems.At the same time,D-P algorithm is introduced to simplify the sound velocity profile,which reduces the computational complexity on the premise of ensuring accuracy.It provides the theoretical basis for the realization of the whole function and the ranging function.The design of the release hardware system is roughly divided into three parts,including determining the corresponding parameters,core plate design and overall structure design.Firstly,the communication parameters are determined according to the corresponding technical index and the performance of the communication system.Secondly,the control circuit with MSP432 processor as the core is determined,which mainly includes power management module,transmitting signal module,transceiver integrated module,pre-amplification and filtering module,motor control module,tilt sensing module,etc.In terms of mechanical structure,a more mainstream motor driven release mechanism was designed.Then the driver of each module is developed to coordinate its normal operation,and the corresponding software is developed based on the core processor.Finally,this paper conducts various tests and experiments on the complete underwater acoustic release device,and gives the results of the electric combination and pool test,verifies the functions of the release system designed in this paper,and realizes the design of the underwater acoustic release device. |
