In order to reduce the casualty risk of emergency search and rescue workers in complex envi-ronment and improve the rescue efficiency,the influence of UAV's ground scanning flight attitude an-gle on the transmission angle of LoRa is explored by using technologies such as airborne wake-up,LoRa sensing positioning and air-ground sensing fusion positioning algorithm,and the performance difference between traditional satellite positioning equipment and LoRa IOT module is compared and analyzed,and the air-ground collaborative positioning strategy based on unmanned aerial vehicle LoRa and the design and implementation of emergency search and rescue system are carried out.The research shows that the azimuth angle of the ground signal received by the unmanned airborne LoRa base station is not limited by the environment in the outdoor valley environment,and the power consumption of the un-manned airborne LoRa airborne wake-up module is significantly lower than that of the satellite positio-ning equipment.After field verification,the unmanned airborne LoRa air-ground sensing and positio-ning emergency search and rescue system designed in this study can effectively achieve the effects of long battery life,quick response and accurate positioning in outdoor complex environment.It is a porta-ble air-ground sensing and positioning search and rescue method,which has a significant effect on re-ducing the risk of casualties and improving rescue efficiency.
关键词
应急搜救/LoRa/无人机/空地感知/三维空间定位
Key words
emergency search and rescue/Long Range Radio(LoRa)/UVA/air-ground sensing/three-dimensional space positioning
维普
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