1. 程式人生 > >Jetson TX1 使用 Rplidar A2 實現 Cartographer

Jetson TX1 使用 Rplidar A2 實現 Cartographer

https://blog.csdn.net/Chris_xrp/article/details/80362487

 

 執行cartographer,首先 編輯用於執行rplidar的配置檔案:

(1)定義一個名為revo_lds_rplidar.lua的檔案,在revo_lds_.lua基礎上修改,

位於/catkin_ws/src/cartographer_ros/cartographer_ros/configuration_files資料夾下,修改了22和23行。

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-- Copyright 2016 The Cartographer Authors

--

-- Licensed under the Apache License, Version 2.0 (the "License");

-- you may not use this file except in compliance with the License.

-- You may obtain a copy of the License at

--

--      http://www.apache.org/licenses/LICENSE-2.0

--

-- Unless required by applicable law or agreed to in writing, software

-- distributed under the License is distributed on an "AS IS" BASIS,

-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-- See the License for the specific language governing permissions and

-- limitations under the License.

 

include "map_builder.lua"

include "trajectory_builder.lua"

 

options = {

  map_builder = MAP_BUILDER,

  trajectory_builder = TRAJECTORY_BUILDER,

  map_frame = "map",

  tracking_frame = "laser",

  published_frame = "laser",

  odom_frame = "odom",

  provide_odom_frame = true,

  use_odometry = false,

  num_laser_scans = 1,

  num_multi_echo_laser_scans = 0,

  num_subdivisions_per_laser_scan = 1,

  num_point_clouds = 0,

  lookup_transform_timeout_sec = 0.2,

  submap_publish_period_sec = 0.3,

  pose_publish_period_sec = 5e-3,

  trajectory_publish_period_sec = 30e-3,

  rangefinder_sampling_ratio = 1.,

  odometry_sampling_ratio = 1.,

  imu_sampling_ratio = 1.,

}

 

MAP_BUILDER.use_trajectory_builder_2d = true

 

TRAJECTORY_BUILDER_2D.submaps.num_range_data = 35

TRAJECTORY_BUILDER_2D.min_range = 0.3

TRAJECTORY_BUILDER_2D.max_range = 8.

TRAJECTORY_BUILDER_2D.missing_data_ray_length = 1.

TRAJECTORY_BUILDER_2D.use_imu_data = false

TRAJECTORY_BUILDER_2D.use_online_correlative_scan_matching = true

TRAJECTORY_BUILDER_2D.real_time_correlative_scan_matcher.linear_search_window = 0.1

TRAJECTORY_BUILDER_2D.real_time_correlative_scan_matcher.translation_delta_cost_weight = 10.

TRAJECTORY_BUILDER_2D.real_time_correlative_scan_matcher.rotation_delta_cost_weight = 1e-1

 

POSE_GRAPH.optimization_problem.huber_scale = 1e2

POSE_GRAPH.optimize_every_n_nodes = 35

POSE_GRAPH.constraint_builder.min_score = 0.65

 

return options

(2)編輯一個launch檔案demo_revo_lds_rplidar.launch,

位於~/catkin_ws/src/cartographer_ros/cartographer_ros/launch資料夾下,在demo_revo_lds.launch基礎上修改,注意23和25行。最後的 playbag 節點刪掉。

內容如下:

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<!--

  Copyright 2016 The Cartographer Authors

 

  Licensed under the Apache License, Version 2.0 (the "License");

  you may not use this file except in compliance with the License.

  You may obtain a copy of the License at

 

       http://www.apache.org/licenses/LICENSE-2.0

 

  Unless required by applicable law or agreed to in writing, software

  distributed under the License is distributed on an "AS IS" BASIS,

  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  See the License for the specific language governing permissions and

  limitations under the License.

-->

 

<launch>

  <param name="/use_sim_time" value="true" />

 

  <node name="cartographer_node" pkg="cartographer_ros"

      type="cartographer_node" args="

          -configuration_directory $(find cartographer_ros)/configuration_files

          -configuration_basename revo_lds_rplidar.lua"

      output="screen">

    <remap from="scan" to="scan" />

  </node>

 

  <node name="cartographer_occupancy_grid_node" pkg="cartographer_ros"

      type="cartographer_occupancy_grid_node" args="-resolution 0.05" />

 

  <node name="rviz" pkg="rviz" type="rviz" required="true"

      args="-d $(find cartographer_ros)/configuration_files/demo_2d.rviz" />

 

</launch>

重新編譯

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[email protected]:~$ cd ~/catkin_ws

[email protected]:~/catkin_ws$ catkin_make_isolated --install --use-ninja

啟動兩個終端,分別執行rplidar的節點和cartographer_ros節點:

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[email protected]:~$ roslaunch rplidar_ros rplidar.launch

2    [email protected]:~/catkin_ws$ roslaunch cartographer_ros demo_revo_lds_rplidar.launch