设计光栅计数卡的关键问题是对光栅脉冲进行倍频以及对倍频后的脉冲进行计数。
The key problems when designing a raster ruler data acquisition card were pulses frequency multiplication and counting.
实验的结果经过分析，符合生产的要求，验证了在光栅计数系统中采用CPLD技术的可行性与正确性。
After analysis, the result of experiment accords the requirement of production and proves the feasibility and correctness of making use of CPLD technology in grating counter system.
但价值和计数属性保持不变的大光栅文件。
But the value and count attributes remained the same with the big raster file.
硬件部分以P89C61X2BA为控制核心，包括采用USBN9604接口芯片的USB接口电路，光栅尺输出信号处理电路，以XC95108为主的信号细分、辨向和计数电路等。
The hardware of the system is made up of P89C61X2BA as main processor, USBN9604 as USB interface, grating signal-processing circuit, XC95108 as signal subdivision, sensing, counter circuit and so on.
硬件部分以P89C61X2BA为控制核心，包括采用USBN9604接口芯片的USB接口电路，光栅尺输出信号处理电路，以XC95108为主的信号细分、辨向和计数电路等。
The hardware of the system is made up of P89C61X2BA as main processor, USBN9604 as USB interface, grating signal-processing circuit, XC95108 as signal subdivision, sensing, counter circuit and so on.
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