利用混沌振子检测微弱正弦信号，以duffing系统为例，采用的梯形积分积分求取微分方程-Detection of chaotic oscillator using weak sinusoidal signal to duffing system as an example, using the trapezoidal integration points to strike a differential equation

本文利用软件相移技术得到相互正交的参考正弦波信号；通过互相关算法，完成了软正交矢量型LIA相关器的具体实现；利用该方法实现了对微弱信号幅值和相位的检测，有效地抑制干扰，减少了硬件电路成本。通过Matlab仿真，验证了该算法具有一定的优越性。-In this paper, the software technology is orthogonal to the phase shift of the reference sine wave signal through cross-correlat