试设计一电加热炉控制系统，使其能同时对一般家用电炉的温度进行控制。利用传感器和变送器检测出炉内的温度，根据温度值与设定值的差值以及该差值随时间的变化率实施控制-Try to design a control system for electric heating furnace so that it can simultaneously ordinary household furnace temperature control. The use of sensors and the transmitter testing baked the temperature, according to the temperature difference between the value and set value as well as the difference between the rate of change over time to exercise control