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相关联辅助像素阵列用于直接飞行时间
1Department of Electronics and Informatics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.
Sensors (Basel, Switzerland)
|August 29, 2024
概括
这项研究引入了一个新的直接飞行时间像素,使用单光子雪崩二极管 (SPAD) 传感器. 它有效地抑制环境光线,可靠的激光脉冲检测,即使在明亮的条件下.
科学领域:
- 光子学和机器视觉技术
- 传感器技术 传感器技术
- 光学传感传感器是什么?
背景情况:
- 新兴需要低功耗,高分辨率,环境光强大的飞行时间 (ToF) 传感器.
- 现有ToF技术在高环境光环境中的局限性.
研究的目的:
- 提出和验证一种新的直接飞行时间像素设计.
- 为了应对环境光干扰和ToF传感功耗的挑战.
- 提高机器视觉应用中的图像分辨率和操作可靠性.
主要方法:
- 使用单光子雪崩二极管 (SPAD) 传感器开发直接飞行时间像素.
- 实现环境光抑制的像素内平均化方法.
- 使用与脉冲激光源同步的直角正弦信号,通过相位检测来确定到达时间.
- 分析和统计建模以评估相位误差和到达时间精度.
- 一个概念验证像素阵列原型的制造和表征.
主要成果:
- 像素模拟显示的相位精度低于检测范围的1%,环境与信号的比率为120.
- 制造出来的原型在环境光线下运行时平均消耗40微瓦的功率.
- 该系统在不同的环境照明条件下有效运行.
- 拟议的像素设计显示了针对特定应用需求的定制潜力.
结论:
- 基于SPAD的新型直接飞行时间像素有效地抑制环境光线,并实现高精度.
- 低功耗和强大的性能使其适用于先进的机器视觉和传感.
- 该技术为现有的直接飞行时间解决方案提供了一个有前途的替代方案,具有适应各种应用的可适应特性.
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