针对室内可见光定位(VLP)一般需要多个发光二极管(LED)信标的问题, 提出一种基于单个LED信标和单个互补金属氧化物(CMOS)传感器的高鲁棒性三维VLP系统。使用额外标记且可调制的LED信标作为VLP系统的发射器, CMOS传感器作为接收器, 采集到的图像被视为一个带有几何特征的椭圆。对采集到的图像进行特征提取与椭圆光斑解调以识别预定信息, 结合单目测距和到达角(AOA)算法求解出待定位点的位置坐标。通过实验评估了VLP系统的性能, 在1.8 m× 1.8 m× 2 m的区域内平均定位精度为9.7 cm, 置信度为80%时可实现13.1 cm的定位误差。

Aiming at the problem that indoor visible light positioning(VLP) generally requires multiple light emitting diode (LED) beacons, a high robustness three-dimensional VLP system based on a single LED beacon and a single complementary metal oxide semiconductor(CMOS) sensor is proposed. A modulable LED beacon with mark on the edge is used as transmitter, CMOS sensors as receiver for VLP systems and the collected image is regarded as an ellipse with geometric features. Perform feature extraction and demodulation of the elliptical light spot on the acquired image to identify predetermined information, and the undetermined position is solved by combining the monocular ranging and the angle of arrival(AOA) algorithm. The performance of the proposed VLP system is evaluated by experiments. The average positioning accuracy is 9.7 cm in the region of 1.8 m×1.8 m×2 m, and the positioning error of 13.1 cm with 80% confidence can be achieved.