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RT @Heavy02011: @diyrobocars : A Home-brew computer club* for Connected Autonomous Driving on Jan 23rd, 2021 https://www.meetup.com/Connected-Autonomous-Driving/events/275728684/ #Meetu…
RT @Heavy02011: @diyrobocars Autonomous Driving Assembly at #rC3. join us at https://rc3.world/rc3/assembly/diyrobocars-f1tenth/ @f1tenth @DAVGtech @DWalmroth…
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An interesting line-following simulator to use with with your robocars:
https://github.com/ron-grant/LFS
An improved version of the @IntelAIResearch OpenBot:
https://diyrobocars.com/2020/12/14/an-improved-version-of-the-intel-openbot/
Replies
Hi Roger,
I think no additional sensor is needed.
Need to write a little function that measure it from pitch, ground, speed, clib rate (vario), and might be airspeed (this sensor we already have).
I might do it for MinimOSD. Will see if i have enough time.
I was thinking that you could use the drag force on a small horizontal post, measured in 2D with strain gauges. The more the post is turned/pushed by the flowing air more more speed can be inferred. By mounting 2 posts at 90 degrees (ie. pointing up and left) you could determine forward, climb and cross wind speeds.
Calibration would still be an issue, but I think that this could be worked out by flying in still air and 'running' the numbers.
Roger: How are you using Hall effect sensors to measure the angular deflection? (Did you make the rotatory position Hall effect sensors, or purchase them?)
-Steve
You could probably snag a low friction potentiometer/encoder from one of these home weather station wind vanes:
Garry
There is a very good reason early measuring devices like smoke or wool tufts were used. I might drop back to a camera and wool tufts again until I figure out the calibration system.
Roger
simplester cheapest? I reconI have done some simple test with a vane and a pot. but found the pots. I have even the small one's from a servo had a high internal friction from the cantacts to be sensitive enough for the vane to move at low airflow, so the idea is a larger vane like a symetrical airfoil that would alway be relativly true to airflow or somthing like that.
AOA can be more usefull than airspeed eg. given AOA well calibrated would result in a certian airspeed irrespective of wind direction etc. can be set up for maximum endurance, best climb rate, auto land were you can be assured the lowest airspeed without stalling etc.etc. ---- my 2 cents.
http://diydrones.com/profiles/blogs/alphabeta-sensor-probe-wo