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Design and implementation of high speed TDI CCD timing-driven circuits
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作者 李波 徐正平 +2 位作者 李军 黄厚田 王德江 《Journal of Measurement Science and Instrumentation》 CAS 2012年第2期185-190,共6页
The time delay integration charge coupled device(TDI CCD)is the key component in remote sensing systems.The paper analyzes the structure and the working principles of the device according to a customized TDI CCD chip.... The time delay integration charge coupled device(TDI CCD)is the key component in remote sensing systems.The paper analyzes the structure and the working principles of the device according to a customized TDI CCD chip.Employing the special clock resources and large-scale phase locked logic(PLL)in field-programmable gate arrays(FPGA),a timing-driven approach is proposed,using which all timing signals including reset gate,horizontal and vertical timing signals,are implemented in one chip.This not only reduces printed circuit board(PCB)space,but also enhances the portability of the system.By studying and calculating CCD parameters thoroughly,load capacity and power consumption,package,etc,are compared between various candidates chips,and detailed comparison results are also listed in table.Experimental results show that clock generator and driving circuit satisfy the requirements of high speed TDI CCD. 展开更多
关键词 time delay integration charge coupled device(TDI CCD) timing-driven circuit field-programmable gate arrays(FPGA)
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基于时序驱动的静态光场式时栅传感方法研究(英文)
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作者 付敏 张兴红 《机床与液压》 北大核心 2015年第24期75-79,共5页
提出了一种用时序驱动光敏元构成匀速扫描坐标系的方法,实现了将被测物体空间位移的测量转换为对时间差的测量。根据时栅相对运动双坐标系的转换原理,将线阵CCD的光敏元视为匀速扫描坐标系,两个空间上并排,时序上互相错开的线阵CCD为静... 提出了一种用时序驱动光敏元构成匀速扫描坐标系的方法,实现了将被测物体空间位移的测量转换为对时间差的测量。根据时栅相对运动双坐标系的转换原理,将线阵CCD的光敏元视为匀速扫描坐标系,两个空间上并排,时序上互相错开的线阵CCD为静止坐标系,则同一被测对象在两个CCD上输出电信号的时间差的变化量与扫描速度的乘积,即为所测位移的大小,并可以判断位移的方向。用雷尼绍激光干涉仪对所研制的CCD时栅传感器进行校准,在有效测量范围(600.05 mm)内,经过修正后的测量误差控制在±2μm以内,实现了在光学领域应用时间测量空间的思想。 展开更多
关键词 DISPLACEMENT measurement Time GRATING DISPLACEMENT sensor CCD DISPLACEMENT sensor timing-driven
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