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Bigcat123
Posts: 230
Joined: Thu Aug 23, 2012 2:41 pm

Laser Range Finding Sensor?

Mon Oct 17, 2016 9:52 am

I am in dire need of getting some sort of module board/sensor that serves the purpose of laser range finding in a direct beam. Does anyone have any suggestions for a piece of hardware of this kind?

I don't want an IR/Ultrasonic version of this - the former is too short range (I need at least a metre, preferably over) and the latter is not reliable enough. What I am hoping to do with a laser range finder is to mount it on some kind of motor and then create a rudimental lidar system for a project of mine.

Hope someone can provide me with some advice/links to good (and preferably cheap!) sensors
Just a beginner sharing his experiences on his way to geek nirvana...

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Gavinmc42
Posts: 3419
Joined: Wed Aug 28, 2013 3:31 am

Re: Laser Range Finding Sensor?

Tue Oct 18, 2016 5:36 am

https://www.sparkfun.com/products/14032
https://www.parallax.com/product/28054
https://www.parallax.com/product/28044

Did not know there was so many now
http://www.robotshop.com/en/lidar.html
http://www.teraranger.com/product/terar ... -robotics/
http://www.sensup-tech.com/products/las ... rf-905-sr/

Time of flight sensors are popping up now, even 3D image cameras.

You could use a laser line generator laser and the Pi Camera.
It will be a little be more accurate than the Webcam solution.
The original David used a line laser.
http://www.david-3d.com/en/

Don't forget the Kinect structure light method too.
I'm dancing on Rainbows.
Raspberries are not Apples or Oranges

fruit-uk
Posts: 609
Joined: Wed Aug 06, 2014 4:19 pm
Location: Suffolk, UK

Tue Oct 18, 2016 6:41 am

Some robotic vacuum cleaners used a rotating laser device, there are a number articles describing how to use these for other rangefinding purposes.
Might be cheaper to find a non-working cleaner and hope the laser still works

PiGraham
Posts: 3567
Joined: Fri Jun 07, 2013 12:37 pm
Location: Waterlooville

Re: Laser Range Finding Sensor?

Tue Oct 18, 2016 7:09 am

You can also look at the Sharp distance sensors (IR LED, not laser) which are available in different ranges including 1.5m (20cm to 150cm) and 3m.
They are analog so you will also need an A to D converter.
http://uk.farnell.com/sharp/gp2y0a02yk0 ... dp/9707891

This is much cheaper than LIDAR and easier to use than laser line & camera.

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