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在“单次碰撞”反应条件下,信号被各种噪声所淹没,本文试图以锁相放大、光子计数、光学多通道分析仪,取样积分器等六种微弱信号处理技术在装置上的综合应用来实现弱光、弱电、弱粒子流及原子、分子状态信息的传感、检测和处理过程。上述信号处理技术都依据自相关函数来同步积累、锁定信号,或以平均为手段来消除统计起伏噪声,用增大时间常数或延长测量时间来改善信噪比。对于检测器有着响应匹配、最小暗电流(暗计数)、使用前老化、电磁场屏蔽、光学聚焦等特殊的低噪声选择原则和使用要求。
Under the condition of “single collision” reaction, the signal is submerged by various noises. This paper attempts to use the integrated application of six kinds of weak signal processing technologies, such as phase-locked amplification, photon counting, optical multi-channel analyzer and sampling integrator, To achieve weak light, weak electricity, weak particle flow and atomic, molecular state information sensing, detection and processing. The above signal processing techniques are based on the autocorrelation function to simultaneously accumulate, lock the signal, or averaging to eliminate statistical fluctuations in the noise, increase the time constant or extend the measurement time to improve the signal to noise ratio. For the detector has a response to match the minimum dark current (dark count), before use aging, electromagnetic shielding, optical focus and other special low-noise selection principles and requirements.