双光路线阵CCD测径系统的驱动控制电路设计

Design of A Drive and Control Circuit for the Diameter Measurement System of Dual Optical Path Linear Array CCD

针对现有的线阵CCD驱动控制电路存在设计复杂和难以实现等问题,设计了一种双光路线阵CCD驱动控制电路。采用逻辑电路和单片机相结合的方式,由总线的4 MHz信号经过触发器分频得到一个2 MHz和两个1 MHz的脉冲信号,将1 MHz的信号与单片机定时器结合得到脉冲宽度为1000 ns的转移脉冲,2 MHz和1 MHz的脉冲信号通过组合逻辑电路得到箝位脉冲、复位脉冲和两个移位脉冲。通过仿真实验和系统测试,得到两个移位脉冲的脉冲频率为1 MHz,占空比为50%且相位相反的方波;箝位脉冲和复位脉冲的占空比均为1∶3,脉冲频率为1 MHz;转移脉冲的脉冲宽度为1000 ns,实现了线阵CCD的驱动控制。

In order to solve the problems,such as complex design and difficulty of linear array CCD driving control circuits,a dual optical path linear array CCD driving control circuit was designed.The combination of logic circuits and single-chip computer was adopted.Then the 4 MHz signal of the bus of the logic circuit was divided by a trigger to obtain a 2 MHz and two 1 MHz pulse signals.The 1 MHz signal was input to the single-chip timer,and then a transfer pulse with a pulse period of 1000 ns was obtained.The 2 MHz and 1 MHz pulse signals pass through the combinational logic circuits,and then a clamp pulse,a reset pulse and two shift pulses were obtained.Through simulation experiments and tests based on the system,t wo opposite square waves were obtained,which were shift pulses with pulse frequencies of 1 MHz and duty ratios of 50%;t he duty ratios of the clamp pulse and the reset pulse were both 1∶3 and the pulse frequency was 1 MHz;the pulse period of the shift pulse was 1000 ns.The design realized the driving control of the linear CCD.