Study of Wireless Transmission Stress Measurement System Based on LoRa

A new wireless transmission stress measurement system was developed using the LoRa for the limitations of on-site stress testing cables of bolt support, including difficult layout, easy damage and high cost. On the basis of retaining off-line stress test analysis, the system can solve the problem of stress signal transmission of bolt support using wireless data transmission technology, so as to achieve real-time online measurement of bolt supporting stress in tunnels and roadways. Engineering practice showed that the wireless stress test system has strong anti-interference and high measurement accuracy and can satisfy test demands, providing strong data support for tunnel safety assessment.