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一、概述在现代冶金、石油、化工以及电力生产过程中,用微型计算机以一定周期对其许多点的物理参数逐个地进行检测,即巡回检测其原理如图1所示。巡回检测时,首先将现场信号用变送器(一般包括传感器和电压放大器)变换为伏级电压信号通过多路开关、模数转换器输入单板机,由单板机计算、加工处理后再把结果显示、打印出来或报警提醒值班人员注意或直接用于控制。
First, an overview In the modern metallurgy, petroleum, chemical and power production process, the use of micro-computer with a certain period of many of its physical parameters for testing, that is, the principle of circuit testing shown in Figure 1. Circuit inspection, the first field signal transmitter (typically including sensors and voltage amplifiers) into volts-level voltage signal through the multiplexer, analog-to-digital converter input to the single-board machine, the single-board computer processing, and then processed The results show that print out or alarm to remind the duty officer to pay attention or direct control.