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Questions tagged [laser-scan]

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'/sync_depth' and '/camera_info' do not appear to be synchronized

Im using depthimage_to_laserscan package to get the laserscan message.Things i have tried 1)sync the time stamp of both the topics using ApproximateTimeSynchronizer with slop value of 0.0001 . 2)...
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laser_scan(/scan) topic not showing and driving 4wheel bot using diff_drive_controller

Hi folks, I am currently implementing a 4wheel bot. I added a laser_scan topic in urdf file, you can see the file below...when i run the launch file, i can't visualize any laser and the "/scan&...
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Laser Scan to Point Cloud Error

Hi, I am trying to convert laser scan data to point cloud as the tutorial that show Here. But i get this error when i make the package using catkin_make: ...
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Laser_Ortho_Projector Transformation

Hi, I am having tf issues with scan tool as in in this link -> http://wiki.ros.org/laser_ortho_projector Under the package summary, it states that the tf transformation of world → base_ortho is ...
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Laser scan wont update although decay time set to zero- gmapping

Hi, I am having this issue when playing the bag file dropbox link. I recorded this bag file with /scan and /tf on a p3dx which has a UHG-08lx laser sensor. The gmapping works fine. But the laser scans ...
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How to publish whole message to a topic?

hello, how can i publish a whole message to a topic?, for example i have Laser Data being published on /lms200 topic, i have made a subscriber node which subscribes to the /lms200 topic which gives me ...
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need explanation on sensor_msgs/LaserScan.msg

Hi, i am new in ROS, the message Definition of a LaserScan.msg is as follows:- ...
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error with tf and laser_scan

I build a navigation stack for my robot. When I roslaunch the launch file, the screen shows "error: couldn't transform from laser to base_footprint, even though the message notifier is in use&...
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How to interpret the meaning of scan_msg?

Hi, This might be a silly question but I have a small doubt regarding the scan_msg in the Laser_scan topic. I am using SICK LMS-200 laser scanner with Pioneer3DX robot for navigation. As I run my code,...
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improve odom by laserscan

How can I improve odom of a robot by a laserscan- what package can i use?I don't have static, global map. I found laser_scan_matcher, but I don't know if it's still supported. Maybe i should play with ...
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Left side of laser scan visualization on android gets weird

Hi. I'm trying to visualize the laser scan read on android. I am doing similar thing that can be found in many sample source codes. This means that I declare ...
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Cloud to Scan: Some Points won't show up in laser scan

Hi, I am trying to tranfsorm my point cloud to a laser scan withe the pointcloud_to_laserscan package. But although I tell the node to go from -Pi to Pi, some ...
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Laser scan to point cloud to octomap - strange result

Hi, I have a laser scanner mounted on an arm. With laser_pipeline and pcl_assembler, I build a point cloud and pass it to the octomap_server. The pcl_assembler runs every 3 seconds. My problem is, in ...
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ROSjava VisualizationView

Hi, have anybody working example of VisualizationView, because the tutorial map_viewer doesn't work. Now I try use VisualizationView for display map and laser scan, but I am not yet successful. In ...
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A question about ROS Laser Scan Assembler

I am using single scan sensor_msgs/LaserScan message provided in laser.bag, and I try to use the Laser Scan Assembler to form a bigger point cloud, by it fails in rviz (seems not bring in sensor_msgs/...
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Navigation stack sensor sources

Hi, I'm studying the navigation stack. My question is, Will PointCloud Message be converted to LaserScan Mesassge? In wiki, it's said that it accepts sensor data published using either the ...
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Is there any delay in laser scanner output?

Hi, I am working on erratic robot and I am running it in gazebo. It has a hokuyo laser scanner on it. I have a question that is there any delay in laser scanner output. What I am doing here is that I ...
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Scan topic for mapping

I'm having trouble with mapping... I have both the laser scan and odometry from a bagfile. When I run the laser scan trough a node (doesn't change any data, just converts to a pointcloud) and convert ...
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Compiler cant find transformLaserScanToPointCloud function

Hi, I am quite new to ROS and also programming :) and facing a problem during making executable for node for converting laser scan to get point cloud from my laser scanner data. Can you please have a ...
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The significance of acceleration limits

This is a sequel to my earlier question here. I am trying to get move_base navigate through a set of goals. My config files are exactly those given in the earlier question. I am running move_base on ...
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