中文摘要：

低温系统是中性束注入器（NBI）获得高真空的有效手段，因此对低温系统的测量和监控的能力将直接影响真空系统的质量。从硬件和软件上设计了一套可以精确测量和监控液氮温度和液氦温度的温度采集系统。硬件上根据液氮和液氯温度差别大的特点，采用Pt100和Cernox两种电阻温度传感器并设计了相匹配的信号放大、传输、A／D采集及转换电路；软件上采用面向对象编程方法设计系统控制程序，使系统具有很高的重用性和扩充性。

英文摘要：

The cryogenic system is an efficient method, which is used to get the high vacuum in Neutral Beam Injection system, so the ability to measure and control the temperature will directly affect the vacuum of system. This paper introduces a temperature acquisition system that can accurately measure and control the temperature of liquid nitrogen and liquid helium. According to the difference of temperature, Pt100 and Cernox resistance sensors are selected. The responding components, such as temperature signal amplifier, transformation components, A/D acquisition and conversion circuits are designed. The system controlling program has been developed with object-oriented programming method, that makes the system to be reused and extended easily.