基于4相位剖面的距离测量方法

An effective distance measurement method based on four-phase section

TOF三维成像技术是利用光信号的飞行时间来判断物体的距离,在尺寸测量、机器安全、汽车防撞系统、无人机地形辅助等方面有着广泛的应用前景和潜在的市场价值。本文针对分辨率360×240的三维成像器件EPC660进行介绍,说明4相位剖面的距离距离测量原理、像素域成像架构与误差消除、信号同步和距离质量判断,特别是环境光、温度、元器件老化等多种影响距离精度的消除方法进行了分析。在实际应用测量中,近距离目标物体的反射率对距离测量的影响较大,会造成采集的数字量饱和。下一步在近距离目标物体距离测量进行研究,为进一步应用TOF三维成像技术在目标物识别方面的应用打下基础。

3D time-of-flight(TOF)imaging technology uses the time-of-flight principle to determine the distance of objects.It has broad application prospects and potential market value in parcel size measurement,machine safety,car collision avoidance systems,and terrain assistance of drones.This paper introduces the 3D imaging device EPC660 with resolution of 360×240 pixels and explains the principle of distance measurement of four-phase section,pixel architecture and error elimination,signal synchronization and quality of the measurement result.In particular,it analyzes various elimination methods affecting the distance accuracy,such as environmental light,temperature and component aging.In practical application measurement,the reflectivity of the close-range object has a great influence on the distance measurement,which will cause the pixel saturation.The next step is focus on the distance measurement of close-range objects,which lays a foundation for further application of 3D TOF imaging technology in target recognition.