| 吴培鹏,蔡文郁,唐国栋,王志强,朱张峰.激光测距动态多阈值误差修正技术研究[J].电子测量与仪器学报,2021,35(7):170-177 |
| 激光测距动态多阈值误差修正技术研究 |
| Laser range measuring system based on dynamicmulti-threshold error correction method |
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| DOI： |
| 中文关键词: 激光测距 飞行时间法 前沿时刻鉴别 动态多阈值法 |
| 英文关键词:laser based range measuring time of flight(ToF) front-edge time identify dynamic multi-threshold |
| 基金项目:浙江省公益技术研究计划项目（LGF20F010005）、浙江省属高校基本科研业务费专项资金（GK209907299001-001）资助 |
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| 中文摘要: |
| 在脉冲式激光飞行时间法测距中,存在着干扰脉冲叠加到信号脉冲上升沿的情况,因此双阈值处理算法无法正确修正
脉冲前沿时刻鉴别误差。 提出了一种动态多阈值拟合误差修正算法,通过动态切换 3 个阈值门限找到最佳的拟合方式,避免因
某个阈值时刻鉴别受到干扰脉冲影响导致错误的拟合修正结果。 除此之外,还提出了阈值时间差关联曲线的新概念,根据修正
点与关联曲线的偏离程度来动态调整阈值门限。 实验测试结果表明,提出的动态多阈值误差修正方法可获得理想的修正结果,
使得错误数据得以滤除,从而提高远距离目标的测距精度。 |
| 英文摘要: |
| At the aspect of time of flight (TOF) based laser ranging, the interference pulse is superimposed on the rising edge of signal
pulse, so the classic double-threshold processing algorithm cannot correct the identification error of pulse front time. In this paper, a
dynamic multi-threshold fitting error correction algorithm is proposed. By switching three thresholds dynamically, the best fitting method
is found to avoid the wrong fitting correction result caused by the interference pulse. In addition, a new concept of threshold time
difference correlation curve is proposed, which adjusts the threshold dynamically according to the deviation degree between correction
point and correlation curve. The experimental results show that the proposed dynamic multi-threshold error correction method can obtain
ideal correction results, allows incorrect data to be filtered out, so as to improve the ranging accuracy of long-range targets. |
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