doi:10.16186/j.cnki.1673-9787.2022040020

Received:2023/04/08

Revised:2023/08/09

Published:2024/03/25

Layout optimization method of new visible light communication light source in mine tunnel

HE Junyi，FAN Guanghui，ZHANG Min，HAN Yijie，WU Mengxiang，FENG Jiashen

School of Computer Science and Technology，Henan Polytechnic University，Jiaozuo 454000，Henan，China

Abstract: Objectives Aiming at the problem of large differences in visible light communication signals in underground mine tunnels，and increased signal errors at the receiving end，a new visible light communication light source layout method in underground mine tunnels was proposed. Methods Compared with existing light source layout methods，the system performance of the two layout methods was evaluated from three aspects：illumination，received power， and signal-to-noise ratio. The coefficients of variation of illumination uniformity，power standard deviation and signal-to-noise ratio were introduced to evaluate the overall performance of the system. Results Through simulation experiments， the impact of different half-power angles on the system performance of the layout method in this paper was analyzed，and it was concluded that the optimal value of the half-power angle was 50°~70°.When the half-power angle was 70°，compared with the existing light source layout method，the illumination uniformity of the layout method proposed in this article was reduced from 0.758 to 0.407，a reduction of 46.3%，and the difference between the minimum illumination and the maximum illumination was smaller，the illumination distribution was more uniform；in terms of received power，the power standard deviation was reduced from 0.97 to 0.42，a reduction of 56.7%， and the power fluctuation was reduced too，and the received power distribution was more uniform；in terms of signal-to-noise ratio，the signal-to-noise ratio variation coefficient was reduced from 0.013 7 dropped to 0.007 2，a reduction of 47.7%，and the signal distribution was more uniform. Conclusions The light source layout method proposed in this article was overall better than existing methods，and can provide a new solution for the light source layout in underground mine tunnels.

Key words:underground mine tunnel；light source layout；simulation analysis；visible light communication