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目前多把直流多路数字电压表用在采样速度不高(10点/秒),而点数又不很多(20～40点)的场合进行巡回检测。随着微型计算机价格逐渐下降,应用逐步普及。我们只要附加简单的接口电路,就可以把多路数字电压表和微型计算机连接起来,利用原电压表的模数变换和多路切换功能,发挥计算机的数据运算和处理能力,构成功能较强的巡测系统。数据可以显示、打印,也可以存贮在磁带或磁盘中,而且可以方便地增加报警和控制功能,构成实时控制系统。例如,用热电偶测量温度时,温度和热电偶输出毫伏数一般呈非线性关系。若将多路数字电压表采集的
At present, the DC multi-channel digital voltmeter is used in the sampling speed is not high (10 points / second), and the points are not many (20 to 40 points) occasions to conduct circuit detection. With the gradual decline in the price of microcomputers, applications are gradually gaining popularity. As long as we attach a simple interface circuit, we can connect multiple digital voltmeters and microcomputers to make use of the analog-digital conversion and multiplex switching functions of the original voltmeter to exert the data computing and processing capabilities of the computer to form a strong function Inspection system. The data can be displayed, printed, stored on tape or disk, and easily added to alarm and control functions to form a real-time control system. For example, when measuring temperature with a thermocouple, the temperature and thermocouple output millivolts are generally non-linear. If the multi-channel digital voltmeter collected