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need help regarding hector slam..i am using rplidar

asked 2015-06-06 06:39:45 -0500

max53 gravatar image

updated 2015-06-11 11:48:07 -0500

i am now successfully running hector slam..i got no error but when i move the lidar the map also changes..i.e map is instantaneous. i got following massage in terminal

SearchDir angle change too large

my launch files are given mapping_default.launch

<launch> <arg name="tf_map_scanmatch_transform_frame_name" default="scanmatcher_frame"/> <arg name="base_frame" default="base_footprint"/> <arg name="odom_frame" default="nav"/> <arg name="pub_map_odom_transform" default="true"/> <arg name="scan_subscriber_queue_size" default="5"/> <arg name="scan_topic" default="scan"/> <arg name="map_size" default="2048"/>

<node pkg="hector_mapping" type="hector_mapping" name="hector_mapping" output="screen">

<!-- Frame names -->
<param name="map_frame" value="map" />
<param name="base_frame" value="base_link" />
<param name="odom_frame" value="base_link" />

<!-- Tf use -->
<param name="use_tf_scan_transformation" value="true"/>
<param name="use_tf_pose_start_estimate" value="false"/>
<param name="pub_map_odom_transform" value="true"/>

<!-- Map size / start point -->
<param name="map_resolution" value="0.050"/>
<param name="map_size" value="$(arg map_size)"/>
<param name="map_start_x" value="0.5"/>
<param name="map_start_y" value="0.5" />
<param name="map_multi_res_levels" value="2" />

<!-- Map update parameters -->
<param name="update_factor_free" value="0.4"/>
<param name="update_factor_occupied" value="0.9" />    
<param name="map_update_distance_thresh" value="0.4"/>
<param name="map_update_angle_thresh" value="0.06" />
<param name="laser_z_min_value" value = "-1.0" />
<param name="laser_z_max_value" value = "1.0" />

<!-- Advertising config --> 
<param name="advertise_map_service" value="true"/>

<param name="scan_subscriber_queue_size" value="$(arg scan_subscriber_queue_size)"/>
<param name="scan_topic" value="$(arg scan_topic)"/>

<!-- Debug parameters -->
<!--
  <param name="output_timing" value="false"/>
  <param name="pub_drawings" value="true"/>
  <param name="pub_debug_output" value="true"/>
-->
<param name="tf_map_scanmatch_transform_frame_name" value="$(arg tf_map_scanmatch_transform_frame_name)" />

</node>

<node pkg="tf" type="static_transform_publisher" name="base_to_laser_broadcaster" args="0 0 0 0 0 0 /base_link /laser 100"/>
</launch>

=====

tutorial.launch

<launch>

<arg name="geotiff_map_file_path" default="$(find hector_geotiff)/maps"/>

<node pkg="rviz" type="rviz" name="rviz" args="-d $(find hector_slam_launch)/rviz_cfg/mapping_demo.rviz"/>

<include file="$(find hector_mapping)/launch/mapping_default.launch"/>

<include file="$(find hector_geotiff)/launch/geotiff_mapper.launch"> <arg name="trajectory_source_frame_name" value="scanmatcher_frame"/> <arg name="map_file_path" value="$(arg geotiff_map_file_path)"/> </include>

</launch>

and when i run rosrun tf tf_echo base_link laser

i get the following At time 1434038117.749 - Translation: [0.000, 0.000, 0.000] - Rotation: in Quaternion [0.000, 0.000, 0.000, 1.000] in RPY [0.000, -0.000, 0.000] At time 1434038118.750 - Translation: [0.000, 0.000, 0.000] - Rotation: in Quaternion [0.000, 0.000, 0.000, 1.000] in RPY [0.000, -0.000, 0.000] At time 1434038119.751 - Translation: [0.000, 0.000, 0.000] - Rotation: in Quaternion [0.000, 0.000, 0.000, 1.000]

need help

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answered 2015-06-22 19:52:55 -0500

Does it happen when you move the LIDAR slowly?

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Asked: 2015-06-06 06:39:45 -0500

Seen: 798 times

Last updated: Jun 11 '15