【摘要】 本文基于Duffing振子检测微弱信号的检测原理,介绍了参数测量法、双耦合振子、利用随机共振、阻尼比扰动和Duffing振子与传统检测法结合的五种检测方法及研究进展,并对后四种检测方法从待测信号信噪比、检测系统抗噪性、可检单或多频信号、适合检测信号类型四方面进行分析比较。结果表明,双耦合和随机共振检测法在四种检测法中稍具优势。更多还原

【Abstract】 Based on the principle of weak signal detection by duffing oscillator, the paper introduces that the measurement method of measured signal parameter, detection method of Coupled Duffing Oscillators(CDO), using Stochastic Resonance technology, disturbing the damping rate and combining duffing oscillator with tradition detection method and theirs study progress. And it analyzed and compared last four kinds detecting method from signal-to-noise ratio of measured signal, resist to chirp nature of detecting system, single or multifrequency signal , the signal type several aspects. The result indicates Coupled Duffing Oscillators and using Stochastic Resonance technology have a little superiority in four kinds detecting method.更多还原