使用点质量模型进行远程轨迹重建
Fabiano Riva1, Frederick Richard Broekhuis2, Michael Haag3
1Ecole Des Sciences Criminelles, Université de Lausanne, Lausanne, Switzerland.
Journal of forensic sciences
|January 8, 2025
概括
法医检查员可以使用点质量模型 (PMM) 重建远程子弹轨迹. 这项研究评估了PMM的准确性,发现了因参数变化和测量错误而导致高入射角度的局限性.
科学领域:
- 法医科学 法医科学 法医科学
- 弹道学 弹道学 弹道学
- 物理 物理学 物理
背景情况:
- 传统的线性模型足以用于短距离 (≤30m) 射击重建.
- 由于重力和飞行时间,远程轨迹 (500m-1800m) 是弧形的,需要先进的模型.
- 点质量模型 (PMM) 是可访问的,并被认为是准确的这些复杂的重建.
研究的目的:
- 评估点质量模型 (PMM) 的准确性,用于远程子弹轨迹的重建.
- 分析关键输入参数对PMM重建精度的影响.
- 为了验证PMM与现实世界的远程手枪轨迹.
主要方法:
- 利用基于点质量模型 (PMM) 的计算机程序进行轨迹重建.
- 在PMM的输入参数变化导致计算的起源区域,而不是一个单一的点.
- 通过将其输出与20个手枪子弹轨迹与多普勒雷达 (500m-1800m) 测量结果进行比较,验证了PMM.
主要成果:
- PMM重建定义了一个起源区域,受参数变异性的影响.
- 重建的准确性是有限的,特别是在高的撞击角度.
- 在重建和雷达测量的偏移之间观察到显著的差异.
结论:
- 点质量模型 (PMM) 提供了远距离射击事件的估计起源区域.
- 模型的局限性在高入射角度下显著,受横风和雷达测量不准确的影响.
- 需要进一步的研究来完善法医应用中远程轨迹重建的准确性.
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