基于DSP技术的光尾流实时探测方案

利用尾流的光散射特性对其进行探测 ,光散射谱强度分布的半值宽度随尾流中气泡群的密度而变化。基于成熟的信号处理技术 ,文中提出了对尾流进行实时探测的解决方案。系统采用CCD光采样 ,ADC数据采集及FIFO缓存 ,DSP数据处理三级流水线方式工作。充分发挥DSP处理器片内存储器容量大的特点 ,使用其片内数据缓冲区交替对CCD进行信号采集和数据处理 ;在进行数据处理过程中 ,处理器以中断方式读取FIFO缓存结果。

A DSP based scheme for real time measurement of wake

We can measure wakes by its light scattering characteristic. The full width at half maximum(FWHM) of light scattering spectrum intensity is varied with the density of wakes. Based on the mature signal processing technique, a scheme for the solution of real time measurement of wakes was presented. The real time measuring system adopts the three-level pipeline structure: optical signal acquisition of the CCD, data acquisition of analog-to-digital converter (ADC) and storage of FIFO, the data procession of DSP. Giving full play to the characteristic of large amount of on-chip memory, DSP acquires and processes the signal of linear CCD with the on-chip buffer alternately. The processor read the FIFO storage data using the interrupt method in the procession of data processing.