Title: Temperature and humidity monitoring and communication system for coal mine working based on LoRa

Authors: Baofeng Zhao; Kaiyuan Zhu

Addresses: Mining Engineering College, Taiyuan University of Technology, Taiyuan, 030024, China ' Mining Engineering College, Taiyuan University of Technology, Taiyuan, 030024, China

Abstract: Aiming at the complexity of the underground coal mine environment and the safety of workers facing geothermal disasters, a LoRa-based communication system for real-time monitoring and control of temperature and humidity in the working environment of underground coal mines is studied and designed. Based on the introduction of the fair-access criterion of MAC protocol, the time division multiplexing protocol is adopted and improved, and the nodes complete the self-clock synchronisation after sending the information packets by redesigning the LoRa data frame structure. While adopting linear topology networking, LoRa relay nodes are adopted and designed for packet sensing, transmission and forwarding functions and the distance arrangement of LoRa relay nodes is experimentally investigated. The experimental test proves that the system realises the expansion of the transmission distance and the improvement of the success rate of packet reception, which meets the wireless communication requirements in underground coal mines.

Keywords: LoRa technology; wireless communication technology; coal mine environmental monitoring; low power consumption.

DOI: 10.1504/IJSNET.2025.143901

International Journal of Sensor Networks, 2025 Vol.47 No.1, pp.36 - 46

Received: 09 Jul 2024
Accepted: 16 Jul 2024
Published online: 13 Jan 2025 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article