参考自利用aloam跑数据集_aloam数据集-CSDN博客

第一步：查看bag的信息

输入rosbag info来查看bag包的信息：

joey@joey-Legion-Y7000P-IRX9:~$ rosbag info '/home/joey/Downloads/data2022/indoor/LiDAR_IMU.bag' 
path:        /home/joey/Downloads/data2022/indoor/LiDAR_IMU.bag
version:     2.0
duration:    1:34s (94s)
start:       Apr 11 2022 22:27:35.73 (1649687255.73)
end:         Apr 11 2022 22:29:10.34 (1649687350.34)
size:        2.5 GB
messages:    19869
compression: none [947/947 chunks]
types:       sensor_msgs/Imu         [6a62c6daae103f4ff57a132d6f95cec2]sensor_msgs/PointCloud2 [1158d486dd51d683ce2f1be655c3c181]
topics:      /hesai/pandar     946 msgs    : sensor_msgs/PointCloud2/imu/data       18923 msgs    : sensor_msgs/Imu

可以看到topic中包含hesai和imu两份数据。

第二步：修改aloam中的部分

在launch中修改：使用remap

 <node pkg="aloam_velodyne" type="ascanRegistration" name="ascanRegistration" output="screen" ><remap from="/velodyne_points" to="/hesai/pandar"/></node>

完整的launch文件如下：（只需要改一处即可）

<launch><param name="scan_line" type="int" value="32" /><!-- if 1, do mapping 10 Hz, if 2, do mapping 5 Hz. Suggest to use 1, it will adjust frequence automaticlly --><param name="mapping_skip_frame" type="int" value="1" /><!-- remove too closed points --><param name="minimum_range" type="double" value="0.3"/><param name="mapping_line_resolution" type="double" value="0.2"/><param name="mapping_plane_resolution" type="double" value="0.4"/><node pkg="aloam_velodyne" type="ascanRegistration" name="ascanRegistration" output="screen" ><remap from="/velodyne_points" to="/hesai/pandar"/></node><node pkg="aloam_velodyne" type="alaserOdometry" name="alaserOdometry" output="screen" /><node pkg="aloam_velodyne" type="alaserMapping" name="alaserMapping" output="screen" /><arg name="rviz" default="true" /><group if="$(arg rviz)"><node launch-prefix="nice" pkg="rviz" type="rviz" name="rviz" args="-d $(find aloam_velodyne)/rviz_cfg/aloam_velodyne.rviz" /></group></launch>

 修改之后，启动aloam

source devel/setup.bash
roslaunch aloam_velodyne aloam_velodyne_HDL_32.launch //还可以运行不同的.launch文件，跑不同线束的激光雷达。

 rosbag play **.bag --clock 播发数据，可以看到运行效果。