Avătămăniței Sebastian Andrei, Căilean Alin-Mihai, Done Adrian, Dimian Mihai, Prelipceanu Marius
Integrated Center for research, development and innovation in Advanced Materials, Nanotechnologies, and Distributed Systems for fabrication and control, Stefan cel Mare University of Suceava, 720229 Suceava, Romania.
Department of Computers, Electronics and Automation, Stefan cel Mare University of Suceava, 720229 Suceava, Romania.
Sensors (Basel). 2020 Feb 8;20(3):909. doi: 10.3390/s20030909.
The usage of Visible Light Communications (VLC) technology in automotive applications is very promising. Nevertheless, in outdoor conditions, the performances of existing VLC systems are strongly affected by the sun or other sources of light. In such situations, the strong parasitic light can saturate the photosensitive element and block data communication. To address the issue, this article analyzes the usage of an adaptive logarithmic transimpedance circuit as an alternative to the classical linear transimpedance circuit. The simulation and experimental evaluation demonstrate benefits of the proposed technique, as it significantly expands the communication distance and optical noise functionality range of the VLC systems and reduces the possibility of photoelement saturation. As a result, this approach might enable outdoor VLC sensors to work in strong sun conditions, the experimental results confirming its validity not only in the laboratory but also in outdoor conditions. A reliable 50 m communication distance is reported for outdoor sunny conditions using a standard power traffic light VLC emitter and a PIN photodiode VLC sensor.
可见光通信（VLC）技术在汽车应用中的使用前景十分广阔。然而，在户外条件下，现有VLC系统的性能会受到太阳或其他光源的强烈影响。在这种情况下，强烈的寄生光会使光敏元件饱和并阻碍数据通信。为解决这一问题，本文分析了使用自适应对数跨阻电路作为传统线性跨阻电路的替代方案。仿真和实验评估证明了该技术的优势，因为它显著扩展了VLC系统的通信距离和光噪声功能范围，并降低了光元件饱和的可能性。因此，这种方法可能使户外VLC传感器能够在强烈阳光条件下工作，实验结果证实了其不仅在实验室而且在户外条件下的有效性。据报道，使用标准功率交通信号灯VLC发射器和PIN光电二极管VLC传感器，在户外阳光充足的条件下可实现可靠的50米通信距离。
