| The ocean transportation is playing a significant role in the modern transport sector due to its advantage of low cost, large capacity and so on. The safety problem of ship operation has become increasingly acute. DSP signal processors has been widely used in all kinds of monitoring systems. But traditional DSP code development process is time-consuming, inefficiency, costly and difficulty. MathWorks company proposed model-based design (MBD). It can compile and generate the corresponding code for the target processor. And automatically call DSP integrated development environment CCS for algorithm validation on the target processor. Therefor developing a heave motion monitoring system for ships which based on DSP processor by MBD is not only simple and fast, but also has important practical value in practical engineering.Firstly, introduce the operating principle of the heave motion monitoring system for ships. It includes the collecting scheme of signal and the extraction process of the displacement data. Secondly, it gives the hardware design for the system. The sensor of signal acquisition is ADXL335. A/D convert is ADS1256. Displacement data is calculated by DSP. Data transmission between internal integrated serial communication interface (SCI) and computer can be displayed on the upper computer in real time.Thirdly, design and primarily varify the embedded software by MBD. Introduce the realization the PC monitoring software platform.At last, integrate software and hardware of the system, form a DSP embedded motion monitoring system for ships that can be operated independently, and is validated by experiments. The experimental results show that the system measurement accuracy is 5 cm, maximum range is 1000 cm, error is 10 cm, and meets the project requirements.The motion monitoring system for ships features the advantage of compact structure, low cost, large range, high resolution, miniaturization, integration, real-time characteristicshas wide application prospect. |
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