检测技术是科技领域的重要组成部分 ,可以说科技发展的每一步都离不开检测技术的配合 ,尤其是极端条件下的检测技术 ,已成为深化认识自然的重要手段。近几十年来 ,随着电子技术的快速发展 ,各种弱物理量 (如弱光、弱电、弱磁、弱声、小位移、微温差、微电导、微振动等 )的测量 Detection technology is an important part of science and technology. It can be said that every step of the development of science and technology can not be separated from the cooperation of detection technologies. Especially in extreme conditions, detection technology has become an important means of deepening understanding of nature. In recent decades, with the rapid development of electronic technology, the measurement of various weak physical quantities (such as weak light, weak electricity, weak magnetic field, weak sound, small displacement, micro-temperature difference, micro conductance, micro vibration, etc.)