基于Simulink的时刻鉴别模块误差分析

发布时间：2018-02-24 10:35

本文关键词： 激光测距时刻鉴别 Simulink　出处：《激光与红外》2017年02期 　论文类型：期刊论文

【摘要】：时刻鉴别模块的定时精度是脉冲激光三维成像系统距离分辨率的主要影响因素,选择合适的时刻鉴别方法对系统设计具有重要意义。本文依靠Simulink模数混合仿真特点,在Simulink中对前沿阈值、恒比定时及高通容阻等几种时刻鉴别方法进行了实现,并根据系统参数自定义激光波形,分析了激光脉宽在0.1~10 ns、入射角在50°~90°及目标距离在0.1~10 km等情况下恒比定时法及高通容阻法的定时误差。仿真结果证明高通容阻法要略优于恒比定时法。相较于从统计学角度分析时刻鉴别总体误差,这种方法能够更好地结合激光波形特征和电路特性动态反映各种时刻鉴别方法在不同情况下的定时误差,为实际应用中的时刻鉴别方法选择提供参考。
[Abstract]:The timing accuracy of the time discriminant module is the main factor that affects the range resolution of the pulse laser 3D imaging system. It is important to select the appropriate time discrimination method for the system design. This paper relies on the characteristics of Simulink analog-to-digital hybrid simulation. Several time discrimination methods, such as frontier threshold, constant ratio timing and high pass capacitance resistance, are implemented in Simulink, and the laser waveforms are customized according to the system parameters. The timing errors of the constant specific timing method and the high pass capacitive resistance method are analyzed under the conditions of laser pulse width of 0.1 ~ 10 nm, incidence angle of 50 掳~ 90 掳and target distance of 0.1 ~ 10 km. The simulation results show that the high pass capacitance resistance method is slightly better than the constant ratio timing method. From the point of view of counting, we identify the total error at all times, This method can better reflect the timing errors of different time discrimination methods under different conditions by combining the characteristics of laser waveforms and circuit characteristics, and provides a reference for the selection of time discrimination methods in practical applications.
【作者单位】：装备学院研究生管理大队;装备学院光电装备系;
【基金】：国家自然科学基金项目(No.61302183)资助
【分类号】：TN249

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