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Lidar Build

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David Cambridge:
Hello All

This week, and after about 4 months of weekends, I finally got the first rendered images from my Lidar project.  If you don’t know about Lidar, they can produce 3D scans and work a bit like radar but use beams of infra-red light instead of radio waves.   

I’ve now got a few hundred hours of footage to edit down to make the build video, but for now here is a demonstration.

https://youtu.be/6_2B-I4BBPA

David

David Cambridge:
Here is a picture of the scanner

David Cambridge:
Here is picture the scanner has built up.  Take a look at the YouTube link above for a  rendered video where I move through the captured 3D world.

David

Joules:
Very nice David, what level of precision are you getting in the point cloud ?

I wish this had been available years ago, modelling marine interiors for refit you had to be a contortionist surveyor, using a single laser measure, and it took hours.  How fast are the scans ?

David Cambridge:
Hi Joules

I’ve used the Garmin Light V3 module, and the data sheet claims update rates up to 650 Hz with the trade-off between accuracy and speed.

I’ve not done much experimentation with configuration parameters, but out of the box I think I was getting about 120 points per second with a flutter of around  plus\minus 3 cm on a wall 2 m away. In terms of scan speed, it’s really whatever you want, with the compromise between resolution and capture time.   

David

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