Design Of Platform Of Ship Structural Stress Monitoring System Based On Multi-core DSP

In recent years,our country's ship building industry is developing rapidly,especially in the development of large ships,plus the ships sailing in the complex environment while improving the ship load leads to the ship's safety problem which is arousing more and more people's concern.Ship structure monitoring,and analysis of ship structure safety status and the evaluation of ship structure fatigue life have a close relationship,and also provide the design of the ship structure a reliable basis.In order to meet the the demand of real-time structure monitoring of ship sailed in a complex environment,this paper put forward a design of platform of ship structural stress monitoring system based on multi-core DSP TMS320C6678.The design not only makes full use of the multi-core DSP powerful parallel processing ability,also uses the advantage of flexible and abundant interface resources,which makes the system more adapted to different needs.On the basis of the design scheme in this paper,the hardware design of a platform of ship structural stress monitoring system needs to be implemented based on the multi-core DSP,and the software design on hardware platform,and the design of DSP communication of upper machine software.In detail,this paper analyses the composition of hardware and software modules and their function.The hardware system mainly completes multi-channel sensor data receiving,and completes the communication with PC,and the data processed will be sent to the PC quickly for display.PC mainly completes the data display and storage,dynamic display of the data and stored in local database,which will be used for ship structure health status evaluation.They communication way used high integrated Gigabit Ethernet interface,which can not only satisfy the design requirements in speed,but also reduce the complexity of configuration of hardware and improve the efficiency of the installation of the platform,which makes the platform more adapted to the ship sailing in complex environment and increasing the flexibility of the system.This paper mainly completed work as follows:First of all,the overall design scheme is given.The first step,the paper analyzes what is needed to be done with the stress calculation method and the stress data filtering algorithm,that is,the basic operation function of hardware system in terms of the stress calculation and the filter design.The second step,according to the demand analysis of ship structural stress monitoring system,the function implementation in this paper is put forward.Finally,an overall scheme of monitoring system platform is designed in this paper.Secondly,the hardware system design of the ship structural stress monitoring system platform is presented.The first step,the overall framework of the hardware system is given,and the connecting way of each module is analyzed,and the work each module should finish is distributed.The second step,the core processor chip of the platform should be selected according to the demand of platform itself.And make a brief introduction about the structure of the core processor.Finally,each unit of the hardware subsystem is designed and the design of the circuit is presented especially for the important part of the platform,and the function of each module also should be analyzed.Introducing from the hardware module,and interface implementations,and combining the coordination of various modules,such as the smallest system,store module,communication interface,and the multi-core DSP as the core of hardware system are researched,and so the hardware design of the whole system is completed.Next,the software for the ship structural stress monitoring system platform is designed.The first step,the whole ship structural stress monitoring system platform software design is analyzed in the paper,including the DSP software and PC software.The second step,according to the software design of multi-core DSP on-chip system and PC,respectively,the hardware module and PC software module are designed to make sure these two modules can exchange data correctly.Finally,the test of the system platform is completed.The core part of this paper is the hardware subsystem based on multi-core DSP TMS320C6678,which completes the signal processing of the whole system,and gives the result to the PC,so as to realize the real-time observation and monitoring of ship structure stress.Based on the multi-core parallel access to the internal or external storage mechanism,the multi-core parallel access memory data bandwidth is studied.Factors such as resource arrangement of storage are considered,and the structure of the software design,as well as in multi-core DSP should follow the principle of parallel access.This paper finished the test of DSP minimum system and its peripherals,including hardware power supply module,clock module,Ethernet interface,serial ports and multi-core parallel tasks,which proved the feasibility of the overall design scheme.