BIM 校正累计误差的激光里程计求解方法
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TP242 TH-3

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国家重点研发计划(2019YFB1312103)、国家自然科学基金(U1813222,U20A20283)项目资助


The solution method of laser odometer for BIM correction of cumulative error
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    摘要:

    建筑机器人室内作业过程中,如何实现里程计精确求解对后续的定位建图及精准作业有着至关重要的影响。 针对传统 同步定位与地图构建(SLAM)方法由于回环检测导致的准确性问题,提出了一种以建筑信息模型(BIM)数据校正激光里程计累 计误差实现精准定位的方法。 首先求解机器人初始时刻在 BIM 中的全局初始定位,其次提取三维点云关键点并转换其为二维 点云,然后以轮式里程计数据为预测值求解帧间运动,最后结合 BIM 数据消除累计误差得到高精度里程计定位。 实验表明:本 方法在机器人初始定位、激光点云处理和消除累计误差的运动求解上具有良好的稳定性和准确性,初始定位误差小于 2 mm,里 程计偏移量误差控制在 0. 09% 内,为建筑机器人精确建图提供了有力保障。

    Abstract:

    During the construction robot indoor operation, how to realize the accurate solution of the odometer has vital influence on the subsequent positioning and mapping and precise operation. The traditional simultaneous localization and map building (SLAM) method has the accuracy problem due to loopback detection. To address this issue, a method using building information modeling (BIM) data to correct the cumulative error of laser odometer is proposed to achieve precise positioning. Firstly, the global initial positioning of the robot in the BIM is solved at the initial moment. Secondly, the key points of the 3D point cloud are extracted and converted into 2D data. Then, the data of the wheel odometer are set as the predicted value to solve the inter-frame transformation. Finally, the BIM data are combined to eliminate the cumulative errors and obtain a high-precision odometer positioning. Experimental results show that this method has good stability and accuracy in robot initial positioning, laser point cloud processing and motion solution for eliminating accumulative errors. The initial positioning error is less than 2 mm, and the odometer offset error is controlled within 0. 09% , which provides a strong guarantee for the accurate establishment of the subsequent point cloud map.

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刘今越,陈小伟,贾晓辉,李铁军. BIM 校正累计误差的激光里程计求解方法[J].仪器仪表学报,2022,43(1):93-102

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  • 在线发布日期: 2023-02-06
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