介绍了被动式(热释电) 红外传感实验的基本原理、实验内容及红外传感实验仪的电路L 关键词: 红外辐射; 热释电传感器; 微弱信号; 超低频 Abstract: The basic p rincip le and the con ten t s of passive inf rared sen sing experim en t are in t roduced. The circu it of inf rared sen sing experim en tal apparatu s is described. Key words: inf rared radiat ion; passive sen so r; sm all signal; low f requency