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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11
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7answers
6k views

Why people use camera instead of laser sensor for robot navigation?

I am working on Robot localization and navigation in urban environments. I want to use Camera. But I am a little bit confused about LRF data or other laser data. Why people want to use camera? why ...
5
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4answers
598 views

Do simple, non-sonic, omni-directional rangefinding beacons exist?

I am on a robotics team that plans to compete in a competition where one of the rules is that no sort of sonic sensor is allowed to be used. I guess that limits it to some sort of EM frequency right? ...
4
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1answer
82 views

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 ...
4
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3answers
3k views

A sensor that can see glass/transparent objects and surfaces

I am currently thinking about making a robot that will autonomously drive around the place. The place I want this robot to drive in however contains quite a few glass walls. When mapping the area I ...
4
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2answers
133 views

Air hockey with a robot as an opponent

I'm not sure if this is the right place to post this but here goes. So, as the title states, I'm planning on building a desk that doubles as an air hockey table which has a robot on the other side. ...
4
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3answers
152 views

Tracking Landspeed Underwater

I am hoping someone might be able to nudge me in the right direction (apologies for the long post but wanted to get all the information I have gained so far down. Basically I am after a solution to ...
3
votes
3answers
892 views

Sensing the level of a liquid in a tube

I'm looking to build a sensor which will detect the level of liquid in a tube. It does not have to be precisely accurate, just detect whether the level is approximately above a certain height. The ...
2
votes
1answer
37 views

How to detect loop closures in 2D laser SLAM?

I am trying to build an occupancy grid map using odometry and 2D lidar data through graph optimization. I am not aware of any reliable loop closing methods using only the 2D laser scans. I have been ...
2
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1answer
211 views

Using SLAM to create 2D topography

I have a small mobile robot with a LidarLite laser range finder attached to a servo. As of now I have the range finder side-sweeping in a 30 degree arc, taking continuous distance readings to the side ...
2
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1answer
158 views

Calibrating a laser scanner to a line camera

We have a high-resolution Riegl laser scanner and mounted atop it a Resonon Pika L, which is a hyperspectral camera which records one spatial column at a time, using the second dimension of the sensor ...
2
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1answer
1k views

Inexpensive lidar/radar rangefinder good up to 100m? [closed]

I've been looking around for a lidar/radar rangefinder for a few months now and can't seem to find anything reasonable for my application. My requirements are pretty straightforward: 100m range I2C ...
2
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1answer
127 views

Directly observing lidar laser rays

I am working with SICK lidars and have to mount/unmount them quite often on my robot. The mounting process is very tedious especially when it comes to making sure that the lidars are horizontal. I ...
2
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1answer
119 views

Laser Beam based model probability in case of single particle

I am trying to calculate likelihood of laser scan($Z$) at give pose($x$) with known map ($m$) using beam based model $P\left(z_t|x_t,m \right)=\prod_{i=1}^{n}P'\left(z_i|x_t,m \right)$ My scan ...
2
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1answer
6k views

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 ...
2
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0answers
142 views

Hokuyo URG-04LX-UG01 and Mac compatibility issues

I've got my hands on this laser range scanner but seem to have some problem receiving any output from it. I can't find any guide on how to set it up on the internet, so I was wondering if it is even ...
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2answers
451 views

What wavelengths are most commonly used in laser-scanners and LIDAR systems?

In Photography SE I've just asked LIDAR burnout; ways to check for damaging infrared lasers before shooting besides looking for posted warnings? and discussed a camera that was damaged by a self-...
1
vote
1answer
59 views

Is it possible to detect road surface or navigation area using LRF data or other laser data in a Park?

I would like to detect road surface in a park. In the park, only small grass are covered with the both side of the road. That means there is road and the both side of the road are covered by small ...
1
vote
1answer
76 views

Building parts, and keeping laser alignment steady

I am building a laser gun for pentathlon targets (also doing one). I would like to know how build a part of the gun and if I can count on a steady laser if it is attached to a motor. The question is ...
1
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1answer
119 views

remote control laser meter [closed]

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
1
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1answer
119 views

Finding changes in environment using 2d laser

I have known map of the environment (2d occupancy grid map). I am trying to find if anything changed in environment using 2d laser while navigating by using maximum likelihood of laser with known map. ...
1
vote
1answer
186 views

good laser scanner/ lidar for 4 wheel robot? [closed]

i was wondering what could be a good laser scanner can someone get for as much as 180$ ? i am planning to use it from SLAM to build a map, so this is why i wanted to ask here ? have anyone tried ...
1
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0answers
362 views

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 ...
0
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1answer
2k views

Resources for object detection with 2D Laser Scanner (planar only)

Would you happen to know some good books, tutorials or articles on how to detect objects and their poses, using 2D laser scanners? My goal is to equip a mobile robot with a laser scanner for object ...
0
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2answers
394 views

Typical laser scanner noise values

I am building an application that executes graphSLAM using datasets recorded in a simulated environment. The dataset has been produced in MRPT using the GridMapNavSimul application. To simulate the ...
0
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3answers
217 views

Understanding the SICK S300 RS422 data output

I'm using a SICK S300 safety scanner connected via RS422 -> USB and I'm trying to decode the lines of data into meaningful values, however looking at the data compared to the Telegram Listing it seems ...
0
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1answer
122 views

Object detection using ToF sensor

I am making an indoor robot and in order to detect static and dynamic objects I have decided to go with ST VL53L1X ToF proximity sensor, here is the link: https://www.st.com/en/imaging-and-photonics-...
0
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2answers
286 views

Laser Scanner for localization in particle filter

I'm working on a particle filter implementation in Matlab and I found one very good in the Robotics Toolbox (available here https://github.com/petercorke/robotics-toolbox-matlab). My problem is that I ...
0
votes
2answers
436 views

Matlab toolbox (Windows) for Sick lasers?

Does anybody know where I can get a matlab toolbox or functions to work with a SICK laser-scanner (Windows OS)? I'm using a SICK-LDRS2110 with ethernet cable, but SOPAS software does not allow me to ...
0
votes
2answers
109 views

Turning an epilog laser into a 3d printer?

We have an epilog laser cutter around here and I was wondering if it would possibly work as a base for a 3d printer? Here is a Dropbox photo album of the laser cutter. I am thinking I will have to get ...
0
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1answer
16 views

Trouble aligning/calibrating camera with laser scanner

I have a robot which has 2 multi-spectral cameras and 1 laser scanner attached. In the end I would like to have the images from the cameras aligned with the scanner so that I can have spectral ...
-2
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1answer
277 views

I want to know whether the Create2 can interface a LIDAR? [closed]

I want to know if the Create 2 can interface a laser radar? For example an RPLidar.