实际上题目的任务就是要设计一个水温自动控制系统，控制对象为1升净水，，系统的功能是温度测量和控温：

在测量部分，要求测量10～70º C的温度范围，还规定了测量的精度需高于0.5º C，测温的结果要求显示。

在控制部分，要求系统能够将水温调节到给定的温度，并进行保温。

在发挥部分，还要求提高温度系统的控制性能，缩短调节时间，提高控制精度，用液晶屏显示水温随时间变化的实时曲线。

-In fact the subject' s task is to design a temperature control system, control object 1 liter water, the system functions of temperature measurement and temperature control: the measurement part, requires measurement of 10 ~ 70 º　C temperature range, also provides a measure The accuracy required is higher than 0.5 º　C, temperature requirements results show. In the control part, require the system to adjust the water temperature to a given temperature, and warm. To play a part, also require raising the temperature control system performance, shorten adjustment time, improve control accuracy, with LCD display real-time temperature curve over time.