Temperature control system has the problems as nonlinear,time-varying,pure lag,and difficult to model. In order to solve these problems,based on the PID control theory,the temperature of water bath was accurately controlled from the external heat without stirring with the LabVIEW2010 and its PID Toolkit as the software developing platform. The result showed that the system has the characteristic of user-friendly interface,high measurement accuracy,safety and reliability,and easy to operate,etc.%温度控制系统具有非线性、时变、纯滞后、建模难、负载扰动等问题,为了解决这些问题,以PID控制理论为基础,LabVIEW2010软件外挂PID工具包为软件开发平台,提出了从水浴外部且无搅拌地对水浴加热,使当前温度无限逼近设定值,实现对水浴温度精确控制.调试结果表明,该系统具有界面友好、测量精度高、安全可靠、易于操作等特点.
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