Robotics Stack Exchange
Robotics Stack Exchange

Questions tagged [laser]

LASER (Light Amplification by Stimulated Emission of Radiation) is an optical device, which emits monochromatic, directional, and coherent light beam (laser light). Commonly used in distance measuring devices such as LIDAR.

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What device do I need to project a laser to point at a specific location?

I'm searching for a (commercial) projector that just projects a single laser point into the world (e.g. using two moving mirrors). However, I'm struggling because I'm not sure what such a thing is called. I either find area projectors that use…
FooTheBar
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What laser power for cutting and engraving wood and Acrylic robot baseplates?

Need to buy a DIY/High School grade laser cutter/engraver How much laser power is needed for wood, acrylic (3 to 6mm thick), cutting and decorative engraving? What parameters I need to take care in selecting suitable machines?
EEd
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remote control laser meter

I am looking to buy a laser distance meter and to connect it to a motor and a 3g cellular to control both the motor and to mesure the distance. I will appriciate your advice on how to do so. thanks
Arik Noi
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DIY Laser cutter for small Acrylic robot baseplate

Need help to choose desk top, low cost, DIY/High school grade laser cutter for making base plate for DIY robots, about maximum A4 paper size, as this photo. Idea, comment, advises, even if only partially cover some and not all questions, are…
EEd
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How to detect loop closure after scan matching?

Hello, How to detect loop closures from the scan matched 2D data? Thanks Originally posted by Raksha Murthy on ROS Answers with karma: 11 on 2017-10-04 Post score: 1
Raksha Murthy
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LIDAR produces "phantom walls"

Hello, We have a SICK LMS100 LIDAR attached to the front of our mobile robot and we have been using it for several years. We suddenly started noticing "phantom walls" appearing in the laser scan when viewed in RViz. You can see a video of the…
Pi Robot
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Laser Scanner Data Fluctuation

Hello, I am using 2 laser scanners, that are produced on two topics scan1 and scan2 respectively. After remapping both topics to one topic scan, the data are fluctuating, it goes in a cycle sometimes it reads from scan1 and sometimes from scan2…
wassimhariri
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Arduino sensor data recombined and published on master computer

I having trouble publishing LaserScan data directly from an Arduinio Mega 2560, is there an example where data is published to the Master in a simpler format and then recombined on the master into the standard Laserscan message type and…
charlie
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Fake LaserScan on Arduino 2560 – The LaserScan data seems to transfer correctly, except the program hangs up after ~ 11-18 successful data transfers

Fake LaserScan on Arduino 2560 – The LaserScan data seems to transfer correctly, except the program hangs up after ~ 11-18 successful data transfers. Any suggestions? Last successful data transfer looks like this – The data package is small to keep…
charlie
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What are LaserScan intensities?

Hi, the LaserScan ROS message is Header header float32 angle_min # start angle of the scan [rad] float32 angle_max # end angle of the scan [rad] float32 angle_increment # angular distance between measurements [rad] float32…
nodge
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Difficulty to use Laser scanner with URG_NODE

Hello, I am trying to get data from a hokuyo laser scanner model (UTM_30LX_EW). I have installed urg_node and all the related dependencies. To check the installation and following the urg_node page in ROS wiki, I run this code: rosrun hokuyo_node…
mohsen1989m
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fake LaserScan on Arduino 2560 gives error Unable to sync with device possible link problem or link software version mismatch

Hi, I am having trouble making LaserScan run on Arduino. I have modified the c version of the fake laserscan code to run on an Arduino Mega 2560 using Indigo rosserial. I am receiving the error Unable to sync with device; possible link problem or…
charlie
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Unable to download laser.bag

Dear folks, I am following this tutorial to use laser scanner. "Introduction to Working With Laser Scanner Data" I will receive my Laser scanner in a few months so I need some raw data to test and develop my program beforehand. When I attempt to…
mohsen1989m
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RANSAC implemetation?

I'm trying to implement RANSAC algorithm for robust detection of lines and corridors using a Hukoyo 2D laser so if someone can help me i would be grateful.I'm trying to find codes wich include ROS cpp implementation. Originally posted by ANY on…
ANY
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rosusarsim pioneer laser sensore read error

i want to read data sensor of pioneer robot which i call in usarsim using ros indigo and try this code ican move the robot using teleope key board backage but iwant to read data ~$ rostopic list /rosout /rosout_agg > ksam@ksam-K53SC:~$ rostopic…
ksmksam
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