【摘要】 简要介绍了锁相放大器的基本组成 ,分析了锁相放大器实现微弱信号检测的原理 ,提出了一种利用锁相放大器在线检测生物发酵过程菌体浓度的新方法 ,并且实验验证了该检测方法的可行性更多还原

【Abstract】 The basic structure of phase locked amplifier is introduced. The principle of phase locked amplifier realizing the detection of weak signal is analyzed,and a new method for measuring cell concentration on line by phase locked amplifier is proposed. The experiment results prove the feasibility of this measuring method.更多还原