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Recently, Boonray Technology's independently developed "Key Technologies and Engineering Applications of Unmanned Mining Dump Trucks with Integrated Charging and Battery Swapping for Complex Scenarios" passed the scientific and technological achievement appraisal of the Shanghai Technology Exchange. The evaluation committee highly praised the project results. It was unanimously agreed that the overall achievement had reached the international advanced level and that the achievement had passed the scientific and technological achievement evaluation.
Internationally leading
Boonray Technology uses its proprietary L4 autonomous driving technology, multi-sensor fusion algorithms, and vehicle intelligent perception technology to develop an integrated charging and battery-swappable unmanned mining dump truck for complex scenarios. The main research contents are as follows:
01
Multi-sensor fusion SLAM positioning technology
For mining scenarios, this project developed a multi-sensor SLAM positioning system based on lidar, inertial navigation, satellite navigation, and wheel speedometer fusion. When the number and quality of satellite search are high, satellite navigation results are used to correct the accumulated errors in the SLAM process, avoiding positioning drift after long-term operation. When satellite navigation quality is poor, lidar SLAM uses a pre-built local point cloud map as a reference to achieve simultaneous positioning and map construction. For low lidar frame rates, high-frequency inertial navigation pre-integration enables high-frequency motion state estimation and interpolation, thereby achieving reliable and accurate high-frequency positioning output.
02
Fusion perception technology of multi-source heterogeneous sensors
This project has developed a perception system based on the fusion of multi-source heterogeneous sensors, including multiple lidars, millimeter-wave radars, and visual sensors (visible light + thermal infrared). It comprehensively utilizes the advantages of various sensors, such as the accuracy of lidar in ranging, the penetration of millimeter-wave radar into dust, rain and fog, and the recognition capabilities of visible light + thermal infrared visual sensors under day and night lighting conditions. Through deep learning technology, machine vision technology, point cloud processing technology, etc., it can achieve reliable identification of construction machinery, pedestrians, fallen rocks, potholes, etc. in harsh environments.
03
Multiple redundant drive-by-wire chassis technology
Unlike passenger cars or commercial vehicles on public roads, mining trucks have minimal wire-controlled operation. To achieve autonomous driving, the chassis must first be controlled by wire. As the cerebellum and nervous system of autonomous driving, the safety of the mine truck's controlled-by-wire chassis plays a crucial role in the overall safety of the unmanned mine truck. To ensure functional safety, this project developed a multi-redundant controlled-by-wire chassis system, including redundant controllers, redundant buses, redundant braking, and redundant steering. This system ensures safe operation even if some components fail. Optimal path algorithms and local dynamic planning techniques enable vehicle-shovel collaboration, transitioning from single-device intelligence to robotic swarm operations.
04
Automatic battery-changing vehicle-station collaborative technology
A dual-path communication system integrating wireless networks and LoRa technology enables real-time vehicle-to-station communication, ensuring a precise and efficient battery swap process, including reservations, verification, precise parking, and automated battery swapping. Multi-sensor fusion SLAM positioning and laser ranging technology enable high-precision docking within 20 cm. Rapid battery swapping within 5 minutes is supported in heavily loaded uphill conditions, while energy recovery technology is used to recharge the battery on downhill runs. Combining a cloud-based scheduling platform with intelligent algorithms, charging and swapping plans are prioritized based on production capacity, optimizing mine operational efficiency.
This achievement of Boonray Technology fully utilizes high-precision positioning technology, multi-source fusion perception technology, intelligent decision-making and optimal trajectory planning technology, robust control technology, and wire-controlled chassis technology, and has realized automatic loading, automatic transportation, parking, automatic unloading, and automatic charging and battery replacement for mining trucks in closed mining scenes.
As competition in the global resource market becomes increasingly fierce, the role of intelligent mining construction is becoming increasingly prominent. Implementing intelligent mining construction has become an inevitable choice and a key breakthrough for promoting innovative management models, enhancing core competitiveness, and achieving sustainable development for mining companies. Boonray Technology will combine its years of accumulated experience and technical accumulation to increase the application and promotion of this "internationally leading" technology, helping to promote the rapid and high-quality development of intelligent mining construction in non-coal mines.
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