基于CPLD的彩色线阵CCD在木板色选系统中的应用  

CPLD-based colorized liner CCD sensor on wood color selection system

作　　者：陆荣鑑[1] 陈丰饶[1] 

机构地区：[1]南京林业大学机械电子工程学院,江苏南京210037

出　　处：《机电工程》2012年第6期737-740,共4页Journal of Mechanical & Electrical Engineering

摘　　要：针对彩色线阵光电耦合器件(CCD)在木板色选系统中驱动电路的设计问题,提出了一种基于复杂可编程逻辑器件(CPLD)的驱动电路设计方案。首先给出了该驱动的系统框图,并介绍了其工作原理,然后对其中各重要模块进行了详细的介绍。该系统采用了Altera公司的EPM240复杂可编程逻辑器件;分析了彩色线阵CCD芯片TCD2252D的驱动时序图;通过硬件描述语言(VHDL)实现了各脉冲信号的发送,并给出了各脉冲参数之间的时序关系。简要介绍了从RBG色彩空间到HSL色彩空间的转换。最后,在QUARTUS 2上进行信号的软件仿真测试,并用逻辑分析仪检测实际电路。应用及实践结果表明,该基于CPLD的驱动电路方案具有可靠性高、成本低廉、维护方便的优点、具有很强的可扩展性,适用于CCD传感器驱动电路的设计。Aiming at the drive circuit design of colorized liner CCD to wood color selection system, a CPLD-based drive circuit was proposed. The system diagram of the CCD driver was introduced at first, and then the important blocks were described in detail. Altera＇s EMP240 was used in the circuit, the driving sequential signal of colorized liner CCD - TCD2252D was analyzed, through VHDL, the details about CPLD design which pulse sending unit was achieved, and the relevance between each pulse was given as well. Moreover, RBG color space to HSL conversion was introduced briefly. Finally, the signal simulation on QUARTUS 2 and the experiment with logic analyzer was proceeded. The results indicate that the CPLD-based driver circuit is reliable, chip, easy to maintain, and suitable for the design of CCD drive circuit.

关 键 词：光电耦合器件 复杂可编程器件 VHDL语言 QUARTUS 2 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置] TS6[自动化与计算机技术—控制科学与工程]