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Laser Developer's Discussions

Laser altimeter - new design

Started this discussion. Last reply by Amy Chen Oct 1, 2014. 49 Replies

Hi to everyone at DIY Drones!I don't know much about UAVs, my specialization is the design of laser products. I recently made a laser range finder by accident that might be useful in UAVs.It started…Continue

 

Laser Developer's Page

Latest Activity

Laser Developer commented on Rick Yonika's blog post Google wing, NASA greased lightning, move over....
"@JB - Wow!"
Mar 22
Laser Developer commented on Rick Yonika's blog post Google wing, NASA greased lightning, move over....
"@JB - Thanks for the reply - interesting stuff. So my reason for asking the question is a thought experiment on the minimum system configuration required for a slow speed inspection drone. It looks like the servo controlled motors are able to…"
Mar 22
Laser Developer commented on Rick Yonika's blog post Google wing, NASA greased lightning, move over....
"@Rick - Let me ask a really dumb question here: Why bother with the wing? Isn't this actually a two motor multi-copter, at least in the way that it's being flown in the video? I know for longer range operation you can make use of the lift…"
Mar 21
Laser Developer commented on Jerry Giant's blog post After 3 years of not making money on drones, I quit
"I may be barking up the wrong tree (or is that crashing into the wrong tree?) but if I'm reading the heading correctly this post is actually about making money from the drone market. A post-mortem based on the state of the drone market may be…"
Mar 14
Laser Developer commented on Nadia Nilsen's blog post LightWare launches the LW20 LiDAR
"@Richard Kennedy - We haven't completed testing over water yet so I can't give you a quantifiable measure of the performance. The surface of water is complex and what works in one condition might not work in other conditions. We'll…"
Mar 2
Laser Developer commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"@Gary - Even I am not too old to learn something new! Thanks for the clarification :)."
Feb 26
Gary McCray commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"Hi LD, The gear lash effect is mostly noticeable in applications where the servo is externally getting pushed in alternate directions. Then the servo has to actively respond and take up the gear the lash in the opposite direction, effectively…"
Feb 24
Laser Developer commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"@Sergey - From our tests on an cloudy day we see about a 10% reduction in the signal strength when changing from 48 readings per second to 388 readings per second. The LW20 will still easily measure our reference wall 110m away but the results are…"
Feb 24
Gary McCray commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"Hi LD, Great application and these little high res, high speed rangefinders are perfect for it. A problem I have found is gear lash, some servos are worse than others - cheap Chinese ones for instance, but lash is always a problem especially when…"
Feb 23
Sergey commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"Very nice device! Btw, what would be a stable measurment range of LW20 on full 388 readings/s speed? Or other way - will LW20 be able to measure up to 100m with good reflecting surfaces on the full output rate speed of 388Hz?"
Feb 23
Muhammad Al-Rawi commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"+1 for re-greasing servo gears. I've done this to my FPV pan/tilt and it turns much smoother. I cleaned off all the old stuff (silicone grease?) and used white lithium. Just what I had laying round."
Feb 22
Laser Developer commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"@JB - Yes, we have investigated optical beam steering using MEMS devices and whilst these are suitable for some high end projects they are way too expensive for to put into a small, lightweight system. The absolute angular accuracy of the LW20…"
Feb 22
JB commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"Thx for the info LD. Will have to budget for a LW20 then! I think all technology can be improved with convergence. I was pretty sure you had already tried it. :-) Are you thinking of using an optical gimbal (or MEMS) in future products? With the…"
Feb 22
Thomas Stone commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"Nice! Simpler mechanics is always better. "
Feb 21
Laser Developer commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"@ JB - The SF11/C doesn't run as fast as the LW20 so it's not as suitable for mapping or collision avoidance. We put a multi-axis sensor in our prototype LW20's along with a bunch of other stuff that you might normally find in the…"
Feb 21
JB commented on Laser Developer's blog post DIY LiDAR scanner using the LW20 and a digital servo
"Great stuff LD. Might need to give this a try. Is it possible to do the same with a SF11 model? Also would mounting a 9axis sensor on the LW20 help with scanning accuracy/tuning?"
Feb 21

Profile Information

About Me:
Specialist engineer designing laser range finders
Please tell us a bit about your UAV interest
Laser altimeters and automatic landing sensors
Hometown:
Johannesburg

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Laser Developer's Blog

DIY LiDAR scanner using the LW20 and a digital servo

Posted on February 20, 2017 at 6:23am 12 Comments

Making a small, low cost laser scanner for sense-and-avoid applications has been a objective of mine for several years. What makes this project challenging is the cost and complexity associated with motors and their drivers to provide the motion, position encoders to provide accurate aiming…

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LW20 LiDAR - half the size, twice the performance, infinitely better.

Posted on October 4, 2016 at 1:56am 32 Comments

LightWare Optoelectronics is proud to share with you some preliminary data on their new miniature laser range finder modules, the LW20 and the SF20 OEM version. These modules will be available later this year and as part of our program of supporting the DIY market we will be offering the OEM…

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Making connections between ArduPilot and laser altimeters easier

Posted on September 3, 2016 at 2:09am 5 Comments

We get lots of help requests from customers trying to configure the PixHawk and other flight controllers that are running ArduPilot software. The existing configuration interfaces, such as those found in Mission Planner, can be confusing, even for experienced users. We've introduced a "drone…

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The world's first commercial drone with collision avoidance LiDAR

Posted on August 30, 2016 at 3:07am 13 Comments

SUAS News posted an article today about the Kespry Drone 2.0, a commercial drone that is advertised as requiring minimal human input during a mission. It has a forward looking LiDAR sensor specifically for obstacle sensing and collision avoidance. This might be that first commercially available drone to…

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Comment Wall (4 comments)

At 4:22am on December 22, 2012, MarioT said…
It's a good idea for high precision flight and landing altitude.
At 5:29pm on January 15, 2014, Gary McCray said…

Hi LD,

Thank you for your considerate offer.

I think your device has very significant applications in what I am doing.

Please contact me at grmccray@yahoo.com.

I am very interested, but my primary interest is in using it for scanning for obstacles and openings.

The composite vision system I am currently working on extracts data from multiple (targeted) inputs and assembles it into an information matrix about the surroundings.

Most of the information I currently have available is short range < 10 meters. (structured light and laser scanner)

Your longer range device could provide a much needed extended look ahead capability.

It would be mounted on a pointable and scanable brushless gimbal.

In any case, please contact me at my above Email address.

Best Regards,

Gary

At 11:46pm on November 8, 2015, Dirk Gorissen said…

Hi LD,

Thanks for the kind offer. We are exploring the EMI system, but in any case it would be useful for the GPR based system (which has similar height control requirements). I cant say much about it yet but will post here when we've reached the next milestone.

If you are willing to provide one that would be great (ping me at dgorissen@gmail.com) and I will give due credit but no worries otherwise.

Thanks again

Dirk

At 7:50am on November 13, 2015, Cala said…

Thank's Laser por compartir sus experiencias, me gusta ver las cosas nuevas, como se pueden aplicar en facilitar las tareas Agricolas, soy productora agropecuaria e ingeniera en produccion agropecuaria, si en algo le puedo aportar con mi opinion de usos en el sector no dude en comentarme.

Saludos

Alejandrina

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