【摘要】 简要介绍32通道温度信号预处理电路,是为计算机控制温度测控系统研制开发的,是该系统的重要前端电子学线路。它主要用于温度传感器信号的采集与处理。该电路不仅可以用来采集处理热电偶的信号,而且可以用来采集处理热电阻的信号。更多还原

【Abstract】 In this paper, a new developed multi-channel pre-processing circuit for signals from temperature sensor was introduced in brief. This circuit was developed to collect and amplify the signals from temperature sensor. This is a universal circuit. It can be used to process the signals from thermocouples, also it can be used to process signals from thermisters. This circuit was mounted in a standard box (440W×405D×125Hmm) as an instrument. This instrument is a key equipment of our automatic temperature measurement system. This instrument contains 32 analog input channels and one analog output. The analog output adopts 32 to 1 multiplex mode. The dynamical range of analog output, the instrument, is from 0 to +10V. This instrument is a computer controlled instrument, it can be controlled by a PC computer, the length of control word is 8 bit. This instrument can be connected in cascade mode. There are 8 boxes at most can be connected together in cascade mode. This instrument has been used in an automatic temperature measurement system to process the signals from thermocouples now.更多还原