Our team is planning to go for European Rover Challenge (ERC) 2018 for which we are designing an Autonomous rover. In order to implement SLAM, we need a way of mapping (with a range of atleast 2-4 meters) for which we considered using a LIDAR or a stereo cam. Could anyone suggest a good, cheap and accurate enough LIDAR, Stereo cam or some other option by which we could achieve this?
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Is it for indoor or outdoor? 2D or 3D? What is the required accuracy in 6 sigma range? – Chanoh Park Apr 26 '18 at 04:46
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Both actually, terrain may not be very detailed. We need a 3D point cloud but if you think for the above mentioned purpose, a 2D one would be enough then please do tell us. An accuracy of about a cm or less would be good. – Abhishek Dinesan Apr 26 '18 at 05:09
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Your description is to broad. If you can not afford LIDAR, consider using structured light. BTW, is this ERC something to do w/automobiles? Your specified distances sound more appropriate for small robots. – st2000 Apr 26 '18 at 12:09
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ERC is European Rover Challenge. By cheap I mean comparitively. – Abhishek Dinesan Apr 26 '18 at 16:24
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Welcome to Robotics Abhishek Dinesan, but I'm afraid that shopping questions really aren't a good fit for a stack exchange site. We prefer practical, answerable questions based on actual problems that you face. Take a look at [ask] and [about] for more information on how stack exchange works, and the Robotics question checklist for details of how to write a good question. – Mark Booth May 28 '19 at 09:20
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There are now some sub and around ~1000USD 3D Lidars available. I wanted to provide an answer for future reference if anyone else comes looking for "cheap" Lidars.
LeddarTech M16 ~500 USD on Ebay
- Range: 110 m
- FOV: 19x3.0 degrees (up to 8.0 degrees depending on model, with 30 m range at that FoV)
- Refresh rate: 6.25 Hz
- https://store.leddartech.com/
BeneWake CE30 ~1000 - 1500USD on ebay
- Range: 30 m
- FoV: 60x4 degrees (up to 132x9 for 4 m range)
- Refresh rate: 30Hz
- http://en.benewake.com/product/detail/5c34571eadd0b639f4340ce5.html
Livox Mid40/Mid-100 ~600 - 1500USD
- Range: 90m
- FoV: 38.4 circular (Mid-40 has a 38.4 circular pattern FoV, so its a bit special, but it can technically be used as a 3D lidar, however the pointcloud pattern is a bit different, the Mid-100 is 3 mid-40 providing up to 100 degree FoV)
- Refresh rate:
- https://store.dji.com/product/livox-mid?vid=48991
A really good review on the Mid-40 can be found here. It also explains some of the challenges with the circular patterns, as some SLAM algorithms and fusing algorithms might needs to be adapted to this new pattern, thus not working out of the box.
Andreas Klintberg
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There is no cheap outdoor 3D LiDAR (as long as the definition of your "cheap" is under USD1000).
This might suit your purpose. There are low cost (USD100~500) 2D LiDARs. You may need to combine camera and LiDAR if you need to cope with pattern-less scenes or dark scenes.
By the way, a good engineer should not use terms such as "good, cheap, accurate" without explanation. Try to quantify your requirements next time.
Chanoh Park
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Will ZED cam or any stereo cam work for environments like say the ones at ERC, URC and all? – Abhishek Dinesan Apr 26 '18 at 06:57
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Depending on how wide your field of view needs to be, having two of those cameras can provide pretty satisfactory results for indoor mapping with the range you mentioned. An Odroid XU4 board has enough power to compute the pointclouds for two of those cameras which you would relay to your main computer (using ROS) where the computation of the 3d map is done.
Mehdi
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If you are looking for a cheap solid state Lidar for a Rover perhaps the Terabee TeraRanger Evo in the 8 x 60m configuration could work for you: TeraRanger Tower
This version can work outdoor within the range you are looking for and it costs €599 so about $ 670 usd
Tom
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