Questions tagged [coordinate-system]
The coordinate-system tag has no usage guidance.
34
questions
-2
votes
0
answers
13
views
Access to coordinate information on the map [closed]
How can I get the (x, y) coordinate data of the black lines on the map I created with Lidar?
0
votes
0
answers
20
views
Camera pose estimation problem
I am creating a Pick and Place program and need help with pose estimation. I am broadcasting on RViz the coordinates based on my YOLO detection and camera. Below is my broadcasting node.
...
0
votes
0
answers
148
views
ROS Transformation between two Coordinate Systems
I have a robot manipulator arm and a tracepen (3D tracked device).
I can get data from the tracepen using tracepenPose, which gives me a ...
0
votes
1
answer
278
views
Conversion of roll, pitch and yaw from ENU to NED
I have roll, pitch and yaw values in an ENU frame.
How can I convert it into a NED frame?
0
votes
1
answer
47
views
How are these equivalent rotation coordinates related?
I am using a 6 DOF UR5 robotic arm. I am successfully sending it commands in the [X,Y,Z,RX,RY,RZ] format. When I read back these coordinates, I find that the X, Y, Z values are the same but the RX, RY,...
- 1
0
votes
1
answer
101
views
How do I convert a set of coordinate and rotation values
I'm an electrical engineer who needs to use a robot for their first time. I have a UR5 that I'm controlling through the rtde interface via Python. It seems that what I'm trying to do must be something ...
- 1
0
votes
0
answers
134
views
Aligning accelerometer readings with vehicle's frame of reference
I have a device with an accelerometer installed in a vehicle. Its orientation in relation to the vehicle is unknown. So I am looking for a reliable way to align the coordinate system of the ...
0
votes
1
answer
69
views
Find a mistake in transformation between different coordinate frames in the WIP-calibration pipeline
I design the extrinsics calibration pipeline for the robotic agents, carrying onboard two sensors of different modalities. I aim to calibrate one of them (S) ...
- 131
0
votes
1
answer
188
views
How the motor commands are obtained from gcodes?
I have started my research with scara and cartesian robots for drawing robot. The gcodes are converted and given to robot. There are firmware like grbl, marlin, etc for this process. But I couldn't ...
0
votes
1
answer
129
views
How to extract robots coordinates using ICP algo
I would like to know How to extract robots localization from the icp or ndt algo, currently I'm using scan registration for this reason
- 123
2
votes
1
answer
181
views
Range of a heading angle [0,2π) or [−π,π)
Consider the unicycle dynamics in 2D plane:
$$\begin{array}{l}
\dot x = v\cos \varphi \\
\dot y = v\sin \varphi \\
\dot \varphi = \omega
\end{array}$$
What is the range of the heading angle $\phi$? ...
- 189
0
votes
0
answers
73
views
Finding orientation of object in 3D space
Given the above constellation, I have to find the orientation of object B in the coordinate system of Object C. The objects A and B are fixed to a certain place and the object C can move in freely in ...
0
votes
0
answers
57
views
Compute absolute position of obstacle in V-Rep from proximity sensor measurement
all. I am trying to construct the map of the environment by using the measurements from the proximity sensor in V-Rep. I have absolute position of the robot. So, I know the X1, Y1 coordinates of the ...
- 3
2
votes
2
answers
75
views
Compute path in absolute frame from sequence of measurements
I have a sequence of measurements $\{(x_i, y_i, \theta_i)\}_{i = 1 \:...\: N}$. Each of these represents the new pose of the robot seen from the previous pose, i.e. a measurement $(x', y', \theta')$ ...
- 189
0
votes
1
answer
61
views
How do you write unit tests for robotics related software?
In my case, I have a library handling 3D input data and want to write tests in order to make sure that my coordinate transform chains for getting the 3D points from A to B are correct.
The problem I ...
- 681
1
vote
1
answer
387
views
Conveyor Belt Calibration for a Robot - Rotation Matrix
Short Question:
As demonstrated in the image below, how can I calculate the rotation matrix that relates the base coordinate and the rectangle coordinate, given 3 known points P1, P2, P3 on the ...
0
votes
1
answer
13
views
Producing an X any Y coordinate from a Lidar sensor
The project I am working on needs to track a ball on a 10' by 10' platform. I need to produce coordinates with the 2d lidar sensor I have. The sensor I have available to me is a Sick TIM561.
The ...
EricMt
0
votes
1
answer
6
views
How to use tf for custom rotation
Hi!
I am trying to generate the starting points and the ending points of the following arrows:
The idea is that I get the start (yellow, 0,0,2) and the end (orange 1, 1, 5).
The arrows are the path ...
kotoko
0
votes
1
answer
5
views
MAVROS coordinate system
Hi, I'm using mavros with PX4 firmware.
I wonder that the values of the orientation published (in quaternion format) are in which coordinate system.
I'm not meaning NED or ENU but the world coordinate ...
NickVot
0
votes
1
answer
4
views
Georeferencing map coordinates
I was wondering how ROS handles georeferencing of map coordinates. My robot currently sets its position when it starts up as position 0.0. However this doesn't give any information about where I am in ...
9a3eedi
0
votes
1
answer
3
views
tf API: Axes/order of rotation
Hello ROS users!
I'm working with tf and I've a few questions about the API.
I am defining frames such that Yaw is applied around Z, followed by Pitch around the new Y and then Roll around new X.
...
Venkat Ganesh
0
votes
1
answer
5
views
Selecting map/odom frames for GPS/IMU
Hello forum,
I am working on a project where I need to combine LIDAR scans and camera images from a drone. An INS mounted on the drone provides GPS and IMU information. I read REP 105 and tf tutorials ...
Venkat Ganesh
0
votes
1
answer
3
views
Getting coordinates through comparing .pgm files using opencv
1 - Generated the .pgm files through gmapping using LIDAR data.
-- One with partial map
-- One with map of the whole area
Trying to:
2 - Use opencv to compare the maps
3 - To get the coordinates of ...
Avonic
0
votes
1
answer
9
views
(Rviz <-> point cloud from pcd) transformation
Hi!
I am reading in point clouds from *.pcd-files and am visualizing them using RViz. Unfortunately, the point cloud is weirdly oriented:
Look here (the "right" side of the point cloud is ...
Jay4Ros
0
votes
1
answer
14
views
How to determine yaw angle from GPS bearing?
How can I determine yaw angle if I know bearing angle from GPS?
The GPS I have can output bearing, which is the angle direction from point1 (at time1) to point2 (at time2). The bearing I have is equal ...
fujisan
0
votes
1
answer
15
views
Occupancy Grid Coordinates
Hi,
This might be a newbie question but i need a help with it or at least to be pointed in the right direction. I need to extract/acquire the (x, y) coordinates of a given map's (grid) cells to be ...
sobot
0
votes
2
answers
2
views
Using TF package to transform rotations
I'm using the Gazebo simulator and gazebo_ros to interface with it. It the simulator, I have a "quadcopter" object. I would like to apply a thrust to the quadcopter. Gazbo_ros offers a way ...
Jordan9
0
votes
1
answer
1
view
Coordinate frames in set_model_state topic with gazebo_ros
I am using ROS Indigo with gazebo 4.0.1 as installed by the ros-indigo-gazebo4-prerelease-* packages. I am trying to use the set_model_state topic to move a Pioneer ...
- 5,512
0
votes
2
answers
1
view
[SOLVED] Getting map co-ordinates
We are building a SLAM map using our Turtlebot. During the process, we stop the Turtlebot at certain points and would like to obtain the x,y,z values from the map coordinate frame.
We are using the /...
aviprobo
0
votes
1
answer
20
views
Project point cloud to image coordinates using camerainfo
Hi,
I'm new to ROS (and PCL as well) so sorry if the question is too trivial...but I've been searching for quite a long time and couldn't find an answer..
I have the pointcloud and I need to project ...
jpo
0
votes
2
answers
21
views
Question regarding Roll Pitch Yaw and coordinate system
Hi all !
I have a question regarding the Roll Pitch Yaw convention in ROS (applying to all the the getRPY and quaternion convertion function).
I am aware that the convention in ROS is the fixed XYZ ...
ETS-Dronolab
0
votes
2
answers
2
views
Drawing poses in a coordinate system in rviz
Hi,
I am developing in a visual SLAM context and would like to draw the resulting camera poses for each keyframe in rviz as coordinate systems(i.e. three arrows), to see how well the localization ...
Oier
0
votes
1
answer
7
views
pcl coordinate system orientation
I am aware that ros uses the positive coordinate system in which x=forward, y=left, and z=up, but can anyone tell me what pcl data uses?
Originally posted by ee.cornwell on ROS Answers with karma: ...
ee.cornwell
0
votes
1
answer
1
view
robot_pose_ekf coordinate frame
I have a visual odometry source which outputs Ros odometry msg in a coordinate system of the camera which is z-axis forward. Now i also have an Imu based odometry which gives data according to ...
Karan