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[DPRG] LiDAR-Lite 360 degree continuously rotating mount

Subject: [DPRG] LiDAR-Lite 360 degree continuously rotating mount
From: David Anderson davida at smu.edu
Date: Sat Feb 14 13:51:54 CST 2015

Oops.  Do you what == Do you know what

OK, back to the chicken soup.

dpa

On 02/14/2015 01:39 PM, David Anderson wrote:
> Do you what the vertical spread of the beam is?
>
> thanks,
> dpa
>
> On 02/14/2015 09:46 AM, Paul Bouchier wrote:
>> FYI - I saw a post from the LIDAR-lite folks posting on RoboBill's 
>> post of a similar rotating platform, and they said that in the first 
>> quarter they'll start shipping units with a 2kHz scan rate. Here's 
>> the URL - look for the post by Dennis Corey.
>> http://diydrones.com/group/ardurover-user-group/forum/topics/contributing-to-giving-sight-to-av-s?commentId=705844%3AComment%3A1870054&groupId=705844%3AGroup%3A903163
>> That's more like what we need for a scanning lidar suitable for 
>> outdoor work.
>> Paul
>>
>>
>> On 02/02/2015 09:45 AM, Paradug wrote:
>>> David,
>>>       I understand your pain. I often have similar thoughts.
>>>      The LiDAR-lite shows promise as a sensor due to its range 
>>> outdoors (~40 meters). It only takes a max of 100 points per second 
>>> which is slow compared to the rotating LiDARs made for indoor use, 
>>> like the Neato XV11 (range ~6 meters indoors), which make about 
>>> ~2000 reads per second. In the example shown in the links, the 
>>> author is showing a successful 360 degree sweep at about once every 
>>> 8 seconds by using 2 sensors. This is a meaningful step forward for 
>>> using these sensors usefully in a robot, but still slow. Using the 
>>> same idea with faster rotation and 360 points per revolution, he 
>>> should be able to get down to about 2 seconds per revolution. For a 
>>> robot going less than 2 or 3 meters per second that might be okay. 
>>> Especially for the case where no object was moving (i.e., people).
>>>     I am considering an LiDAR-lite based idea that is different for 
>>> use on my outdoor robot. The linked project has some ideas worth 
>>> stealing ;^). However, I am still on the fence on purchasing the 
>>> LiDAR-lite. I need to have a firmer grasp of what I have to 
>>> accomplish in the software. The SLAM course I mentioned earlier is 
>>> helping that situation.
>>>     This might be a good opportunity for a group project within the 
>>> club. I know some members have LiDAR-lites.
>>> Regards,
>>> Doug P.
>>> *From:* David Anderson <mailto:davida at smu.edu>
>>> *Sent:* Monday, February 02, 2015 9:44 AM
>>> *To:* dprglist at dprg.org <mailto:dprglist at dprg.org>
>>> *Subject:* Re: [DPRG] LiDAR-Lite 360 degree continuously rotating mount
>>> Cool.
>>>
>>> <rant>
>>>
>>> In all my other hobbies, except robotics, when someone has a new 
>>> innovation, they show their craft (heli, sailboat, whatever) doing 
>>> something really cool, and then explain the technology that makes it 
>>> possible. That's why I might be interested in the technology, 
>>> because it allows the platform to do something interesting that 
>>> can't be done any other way.
>>>
>>> But that is never the case with hobby robotics. Instead, the 
>>> technology is demonstrated as if it is an end in itself, with the 
>>> hope that someone will eventually do something cool with it.  Just 
>>> once, I'd like to go to a link like that posted below by Doug, and 
>>> see a video of a robot DOING SOMETHING interesting, followed by a 
>>> description of the technology required to do that interesting thing.
>>>
>>> (As an aside, this same thing seems to apply in spades to all the 
>>> hobbiest ROS robots I've come across.  Surely there are some HOBBY 
>>> robots running ROS somewhere out there DOING SOMETHING  interesting 
>>> that makes all the pain of getting ROS to work worthwhile.   If so 
>>> they seem to be keeping pretty quiet about  it.   Where are all the 
>>> videos?)
>>>
>>> </rant>
>>>
>>> OK, I'm done, move along, nothing to see here...
>>>
>>> dpa
>>>
>>>
>>>
>>>
>>> On 02/02/2015 08:15 AM, Paradug wrote:
>>>> Here is an interesting project for members with 2 LiDAR-lites.
>>>> http://www.thingiverse.com/thing:662646
>>>> *http://hackaday.io/project/4087-360-degree-lidar-lite-scanner*
>>>> Regards,
>>>> Doug P.
>>>>
>>>>
>>>>
>>>>
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>>
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