便携式测量系统中彩色线阵CCD数据采集电路的设计

本文提出了将彩色线阵CCD光电传感器用于现代便携式测量系统的设计方案.针对便携式系统尺寸小、功耗低的特点,设计了彩色线阵CCD的数据采集电路.该电路的功能是获取便携式毒气测量仪中侦毒管内的化学试剂发生化学反应前后的颜色信息,从而最终使整个测量系统完成毒气种类和毒气浓度的判别.该电路包含CCD器件的驱动电路,模拟信号的数字化电路和数据存储电路,以及电源控制电路等模块.该数据采集电路具有高速,节能的特点.使用该电路对被测物模型进行实际测量,显示了该数据采集电路的有效性.该数据采集电路测量侦毒管颜色变化长度的分辨力为0.06 mm.

Design of an Electric Circuit Based on a Color-linear-CCD for Data Acquisition in a Portable Measurement System

The color-linear CCD sensor is used in a novel portable poison gas measurement system. The electric circuit based on the color-linear-CCD is designed for data acquisition, considering the small size and low power consumption of the portable measurement system. The circuit is used to obtain the color information of the chemical agent filled in the glass tube. Hence, the type and the concentration of the poison gas can be further obtained. Three main functions of the circuit are: driving the CCD sensor, the A/D conversion and storage of the acquired data, as well as power management. The designed electric circuit has the features of high speed and small power consumption. In our experiments it is used to measure an equivalent of the glass tube full of the chemical agent. The results show that the electric circuit based on the color-linear-CCD can be used to obtain the color information efficiently. The consequent resolution is 0.06 mm in length.