From my post on “MV Primer” in the tech discussion area of the forum - I want to start a project HERE. “I have the idea that I would like to make a line following robot for a grid. At each grid intersection could be a symbol so it would have the idea of which node it was approaching and its pose r…

Normally you’d use an inv tangent function there, but given the distortion effect in slope between the line close to you and that far away, I’m thinking of just implementing a regular PID and see if I can tune the distortion away with damping functions. Still, we’re making some progress. Now it wea…

I think it’s the arctan(delta_y/delta_x) = pheta. Where delta_y is the average of y deltas and delta x is the average of x deltas.

I’ve now updated the code with the arctan function you suggested and a basic PID loop to control the steering. Seems to work better! zlite/OpenMVrover/blob/master/pidrover.py # Autonomous rover code by Chris Anderson, 3DR, DIY Robocars # Copyrigbt 2017 # Released under a BSD 2.0 Ope…

BTW, here’s the built-in line-following code with a PID motor controller added. Works great! zlite/OpenMVrover/blob/master/linefollowing.py # This file is part of the OpenMV project. # Copyright (c) 2013-2017 Ibrahim Abdelkader <iabdalkader@openmv.io> & Kwabena W. Agyeman <kwagyeman…

I’ve now updated the code to follow lines of any color, so you can switch lanes on a FormulaPi track. Here’s the code: zlite/OpenMVrover/blob/master/colorlinefollowing.py # Color Line Following Example with PID Steering # # For this script to work properly you should point the camer…

This code with the new M7 OpenMV cam did great this weekend at the Thunderhill Self Racing Cars/DIY Robocars race ( Login to Meetup | Meetup ). Came in 2nd, beating out nVidia TX2 cars and a lot of RaspberryPi 3s. Here’s a practice lap: [OpenMV autonomous rover] The code is here: OpenMVr…

OMG that is fast. Like a druken sailor. You’re definitely pushing the PID loop out of it’s control zone. But, hey, it still works. If you went slower I bet you could lock perfectly on the line.

Going fast was the point of the race :wink: Winning drunk is still winning!

Trevor, I’m trying to do the same, but it’s not working as well as yours. My code is here: GitHub - zlite/OpenMVrover: Autonomous car using the OpenMV camera . Can you share yours? Hello Zlite I am working on this project with my uncle who is Trevor we been tackling this for a while this was our…

Line Following - Blob Spotting/Decoding robot

OpenMV Boards

kwagyeman February 27, 2017, 1:29am 31

Seems to need a lot of PID update. Well, the M7 will give you double the FPS so this should help a lot.

(small) Lane following

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Line Following - Blob Spotting/Decoding robot

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