RoboCup Junior Rescue Line 2022 | 3. run, team BitFlip

This videos shows the third run of team BitFlip at the GermanOpen 2022 in Kassel. If you have any questions regarding our robot feel free to leave a comment.
Website: kraemer123.de/

[@dipl.-ing.matthiaskramer2909]

Der perfekte Linefollower!

[@pqori]

Hi! i’m doing the robocup rescue line in aus, i was wondering how your claw works? that’s an interesting design for the claw!

[@evbrobocup]

In principle, the gripper consists of two semicircular blades that can be closed with a servo motor. The whole construction can also be moved up and down with a second servo. However, we switched to another design this year since the robot needs a lot of space when picking up the rescue kit as the robot always has to make two 180° turns around the front axis.

[@ITZ-2407]

how it rotate at the green corner

[@evbrobocup]

Do you mean how we detect the green turning signals?

[@ITZ-2407]

@@evbrobocup yes

[@evbrobocup]

We employ a recursive algorithm to find "groups of green pixels" and then use the average position of the black lines around it to determine its relative position to surrounding black lines. This information is then used to determine the final turning direction. Feel free to check out the TDP on our website if you want to dig deeper.

[@ITZ-2407]

@@evbrobocup did you use camera or color detection sensor
also what me TDP
if you can give me the link

[@evbrobocup]

We use a camera for line following (including green detection). TH-cam is quite strict when it comes to posting links and we might make changes on the website leading to ghost links, but you can find the TDP on our website (Link is in the video description). Just click on "BitFlip" -> "robot" and then choose the year you are interested in. All the information about the robot of this season can be found in the according subpage, including our TDP (if there is one)

[@frozenazoez3501]

what did u do in the code so u made it to go around the object your dodging?

[@evbrobocup]

Hey, if you mean how we navigate around the obstacle at 0:29, we just use a common Time of flight distance sensor at the front of our robot. As soon as it detects a distance < 5cm, we just drive around the obstacle until the camera of our robot finds a black line again.

[@frozenazoez3501]

@@evbrobocup i see thank u very much for this information

[@evbrobocup]

@@frozenazoez3501 No problem, glad I could help

[@nonogaming6973]

hello guys
my friend and I are gonna do the robocup rescue line finale in France for 2023. while programming the robot, we got a big problem with the intersections: when the robot has to turn (when it see a green square), its working. but when it has to go straight ahead (when it see the line first and then the green square), it dosen't work
can you please help us?
thank you.

[@evbrobocup]

Hello,
do you use a camera or usual sensors for linefollowing?

[@nonogaming6973]

@@evbrobocup hello, im using a line + color sensor (im using a mbot 2)

[@evbrobocup]

Okay, what about driving a bit backwards (~1cm) as soon as you detect a green turning signal. Then you can read out the sensor and if it detects black, you just drive forward a few cm (to overcome the intersection) and continue linefollowing. If the sensor did not see black however, you turn 90° left/right and then continue linefollowing

[@nonogaming6973]

@@evbrobocup thank you very much for your help. Its now working :). Have a nice day.

[@evbrobocup]

​@@nonogaming6973 Glad I could help, good luck to you guys!
Hopefully, we will meet in France at the World Championships!