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Problem with hector_slam

I am getting a warning with hector_slam tutorial.launch : [ WARN] [1416748437.266266949]: No transform between frames /map and scanmatcher_frame available after 20.005297 seconds of waiting. This...

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Connecting ROS and an "open source" radar system

I've been developing an "open source" radar system. Its main purpose is to provide **anyone** with the ability to construct a low cost scanner for **outdoor** use. I've adapted a [LIDAR...

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can't run gmapping scan

I am following the tutorial here to make a simple map from already prepared data: http://wiki.ros.org/slam_gmapping/Tutorials/MappingFromLoggedData however, I get stuck at this step: > rosrun...

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Does laser_scan_matcher work with scans of more/less than 180 degrees?

Hi all, I use the package [laser_scan_matcher](http://wiki.ros.org/laser_scan_matcher) to detect whether a TrutleBot2 robot is stuck (by comparing the matcher pose to the odometry/commanded velocity)....

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AMCL Localization, Drifts when turning

Hi people, I am using a differential drive robot with a sick laser scanner. When I am driving him forwards everything is fine but when I start turning the LaserScan doesnt match with the map and it...

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Gmapping in largely empty space

I am trying to run gmapping in a large empty space with hokuyo utm-30lx. The problem is that most of the readings on /scan is inf and gmapping is not mapping that as empty space, even though I have the...

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Gazebo and move_base problem

Hello I'm using Ubuntu 12.04 and ROS fuerte I' simulating SLAM using gazebo and I followed Learning ROS book. Now I reached move_base.launch but when I run it, it gave the following errors: [ WARN]...

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Scan message must contain angles from -x to x

I follow the tutorial [turtlebot_simulator](http://wiki.ros.org/turtlebot_simulator/Tutorials/hydro/Make%20a%20map%20and%20navigate%20with%20it) to make a map in a simulated world.But when I run >...

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Errors in RVIZ and Static Transform Publisher with Hokuyo

I managed to use Hokuyo laser to scan the area and display on the grid. However I still encounter some problems such as: TF /map: Warning TF /my_frame: Warning Map: Warning I'm not sure what I missed...

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laser_scan_matcher (error in scan matching)

I am using indigo. my lidar is RPlidar. ı can use gmapping with this lidar. ı have a tf for base_link between laser. I need to use laser_scan_matcher . laser_scan_matcher is working succesfully with...

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rviz relative laser TF orientation seems wrong

It is likely I am not understanding something fundamental, but when I show laser scan data relative to a laser TF, RViz shows it in a strange orientation with respect to my base_laser frame. The...

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Stage navigation multiple robots

Hello, I want to have multiple robots in stage navigation. I used the stage navigation tutorial code. The problem is I can have gmapping with 1 robot. But if I include a second robot the TF doesnt work...

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Getting the error :"terminate called after throwing an instance of...

I'm trying to convert a laserscan into a point cloud. I have used this code : http://answers.ros.org/question/11232/how-to-turn-laser-scan-to-point-cloud-map/ . Now, when I play the bag, I run the tf...

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Using subscriber to subscribe the Lidar's signal Topic

Hello ROS users, I am using a subscriber to subscribe lidar's signal. I have watched the subscriber and publisher example(C++) tutorial's video and use catkin_ws to build a package, and I make a...

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Not use kinect, how to show scan by rviz?

I use binocular cameras to capture images, and calculate the depth images. Now I transform depth image to pointcloud msg, I can show pointcloud by rviz. Finally, I use pointcloud_to_laserscan node to...

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Any suggestions for combining scans of different frequencies?

I'm combining two scans, one extracted from a depth camera, and the other from a 2D LIDAR. But I'm getting some jitter from the depth camera's scan's contribution. I suppose it's to be expected when...

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data format of /scan

Hi all, I'm using ROS INDIGO. I used depthimage_to_laserscan to obtain scan data. what does the values under /scan represent? is it the range from the obstacles(metres or centimetres).?

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How can I use the Hokuyo UTM-30LX via wifi?

Hi everybody, I'd like to know if there is a way to use the Hokuyo UTM-30LX via WiFi and, possibly, change the scan rate of the sensor. Thanks in advance!

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Convert network Lidar data to LaserScan

Hi there! I am trying to stream data back from my Parrot AR Drone 2.0, which has a LIDAR attached, to my PC (which has ROS running) in order to run Hector Slam. I currently have code running on the...

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Sacn Topic interpretation

Hi, Can I know how to interpret lidar data obtained on scan topic. I am using Hokuyo UST-10LX. Are the published values in cms or m ? I could not get this from the datasheet. Thanks in advance.

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