微机控制的恒电流仪及数据采集系统

• 作 者: 赵叔唏 赵剑曦
• 机 构: 中国科技大学,福建农学院,
• 出 处: 计算机与应用化学
• 发表日期: 1990年01期
• 关键词: 计时电位法 微机控制 过渡时间 恒电流仪 数据采集系统 电解池 测量对象 接口装置 曲线测量 数模转换

一、引言控制电流是电化学的一种经典研究方法。如在计时电位法中,流经电解池的电流是控制对象,而各个时刻的极化电位(?)和时间 t 是测量对象,并常常从(?)～t 曲线测量过渡时间ι。由于过渡时间一般需要控制在数秒之内,因此数据的记录比较困难。作者曾用Apple-Ⅱ微型计算机,并配以数模转换接口装置,由 DA 产生恒电流控制信号,按固定的时序间隔,直接采集电位数值,从而获得(?)～t 曲线,完成了微机控制的计时电位法测

I. INTRODUCTION Controlling current is a classic method of electrochemical research. As in the chronopotentiometry, the current flowing through the cell is the object of control, and the polarization potential (?) And time t at each moment are the objects of measurement, and the transition time ι is often measured from (?) To t. Because transition time generally needs to be controlled within a few seconds, data logging is more difficult. The author used the Apple-II microcomputer and equipped with a digital-analog conversion interface device to generate a constant current control signal by the DA and directly collect the potential value at a fixed time interval to obtain the (?) ~t curve and complete the microcomputer control Timing Potential Method