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...
View ArticleConnecting 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...
View Articlecan'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...
View ArticleDoes 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)....
View ArticleAMCL 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...
View ArticleGmapping 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...
View ArticleGazebo 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]...
View ArticleScan 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 >...
View ArticleErrors 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...
View Articlelaser_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...
View Articlerviz 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...
View ArticleStage 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...
View ArticleGetting 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...
View ArticleUsing 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...
View ArticleNot 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...
View ArticleAny 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...
View Articledata 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).?
View ArticleHow 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!
View ArticleConvert 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...
View ArticleSacn 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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