In case you're looking for an optical flow sensor, there is now one available in the DIYDrones store for a penny under $40.
This sensor is based on the ADNS3080 mouse sensor which is a good choice for optical flow because:
high resolution: 30 x 30 pixel frames meaning it can see features that lesser mice cannot
high speed: 2000 to 6400 frames per second update rate which contributes to better low light performance than other mouse sensors
SPI interface meaning it can be interfaced to many micro controllers and co-exist with other sensors
Other features:
- Intended to interface with a 5v microcontroller.
- 8mm lens with 11 deg FOV
- Standard M12x0.5 lens mount meaning you can replace the lense easily if required
Instructions for connecting the sensor to your APM/Oilpan are here.
Things to be careful of:
- Performs best outdoors in well lit environments
- Does not play well with Fluorescent lights (the blinking throws off the sensor)
- Needs a somewhat varied surface to see movement (plain carpets are not it's friend)
Uses including odometry and obstacle avoidance but I've used it mostly for horizontal position hold.
Note: integration with ACM and the existing GPS pos hold is a work-in-progress but should hopefully be completed in a few weeks. Here is a video of a slightly modified version of the ACM code using only optical flow (and sonar for altitude hold).
Inspiration and some technical help especially early on came from Marko Klein Berkenbusch and his blog on position hold with mouse sensor.
Hope you like it, all comments welcome!
Comments
Hi,
I am using optical flow ADNS 3080 for my project, I used python and grabbed image and all the set-up was fine but now my sensor does not work with mission planner. If I reset APM then it works for some-time and then displays no values again. I am using latest firmware for quadcopter and of_loiter mode to enable optical flow. Can someone tell me where I am wrong..any suggestions..??
Thanks in advance
Sufal
Thank you! I read (translated) inattentively.
Chose option "B". Tested in two programs. In the program "Mission Planner" the test does not work.
B is correct I think. If you look closely on the wiki page you'll find it says, "Default mounting is lens pointing down, pins forward" although we should have made it more obvious by orienting the sensor in the picture the correct way.
What direction is correct A, B, C, D.
OF_Loiter test was a failure. On the product's ADNS-3080 Optical Flow V1.0 no label forward.
Sufal,
Yes, it should.
Hi,
Does ADNS-3080 works with APM 2.6 ..?
thanks
I also want it!
Any idea when 3D Robotics plans to sell the Optical Flow Sensor for ArduPilot 2.5? I noticed there hasn't been much discussion in the last few months.
Hi Randy, do you know anywhere where I can get the optical flow sensor? I really need it badly. I'm now working on some projects using the arducopters. We've got 4 arducopters with APM 2.5, and we need to hold the position without GPS. I think the optical flow sensors can satisfy our requirements, but they're no longer on 3DR's website now.
Thanks.