Title: Temperature control system of resistance furnace
Abstract
This article introduced with 8031 monolithic integrated circuits realizations resistance furnace temperature control, the resistance furnace is a kind of quantity greatly but the broad industrial equipment, using the monolithic integrated circuit realization temperature real-time control, the numeral demonstrated, to enhance the labor productivity and the product quality, saves the energy all to have the positive sense.
This control system mainly is the controlled process which adds water heats up, when the work the water temperature enlarges by the digital thermometer and the precision amplifier to the 0~5v voltage signal, transforms the digital signal by ADC0809 which the monolithic integrated circuit can accept, this signal and the temperature given value comparison obtains the temperature deviation, obtains the control quantity through the PID control algorithm operation, this control quantity adds after the silicon-controlled rectifier on the resistance furnace the voltage passes breaks the time by to achieve controls the warm goal.
System given value Parameter and so on sampling period by the keyboard entry, and may revise as necessary, assigns at the same time the temperature and the sampling period demonstrates on LED.
Keywords: single chip computer; electric furnace; control
