Search found 28 matches

by Barry
Tue Nov 09, 2021 12:43 am
Forum: Developer Discussions
Topic: Line tracking with obstacle avoidance
Replies: 2
Views: 292

Re: Line tracking with obstacle avoidance

Potential field based obstacle avoidance perhaps? Or turn the drone 90 degrees and do wall following until you see the line again. Depended on how complex the obstacle is, you could also just move to the right if your front multi-ranger gets triggered, until the obstacle is gone (and you know for s...
by Barry
Tue Nov 09, 2021 12:42 am
Forum: Developer Discussions
Topic: Where is the control part?
Replies: 1
Views: 256

Where is the control part?

Dear All, I am confused about where is the control part of the optical flow. I know there is a kalman_core.c and flowdeck_v1v2.c. I am sorry that I am not familiar with the firmware. It looks like from the flowdeck_v1v2.c we can get the motion difference in the x and y-direction. But how can we util...
by Barry
Fri Nov 05, 2021 6:28 am
Forum: Developer Discussions
Topic: Line tracking with obstacle avoidance
Replies: 2
Views: 292

Line tracking with obstacle avoidance

Hi all, I am recently doing line tracking using the crazyflie bolt drone. I want to implement obstacle avoidance while performing line tracking. When the drone met the obstacle, then it will avoid the obstacle and then go back to the line. For obstacle avoidance, I used the multiranger deck. Could a...
by Barry
Tue Nov 02, 2021 6:31 am
Forum: Developer Discussions
Topic: Crazyflie Maximum Speed
Replies: 1
Views: 313

Crazyflie Maximum Speed

Dear All,

I am using a bolt and a flow deck to make a drone right now.

My question is what is the maximum speed in x/y that the drone can achieve? I used python API: send_hover_setpoint()

Cheers!
by Barry
Fri Oct 22, 2021 1:43 am
Forum: General discussions
Topic: Project Issue
Replies: 2
Views: 435

Re: Project Issue

Could anyone give me some brief ideas, I would appreciate that!

Cheers!
by Barry
Thu Oct 21, 2021 5:31 am
Forum: General discussions
Topic: Project Issue
Replies: 2
Views: 435

Project Issue

Hi all,

I am recently doing a project that I need the drone to fly to any room that is user-defined, we have the room plane figure.

While during the flying we need real-time streaming and avoid the obstacle.

Could anyone have ideas about how to implement this project?

Cheers!
by Barry
Wed Oct 13, 2021 10:59 am
Forum: Loco Positioning System
Topic: Take Off Drift Issue
Replies: 5
Views: 810

Re: Take Off Drift Issue

Right now I think we use the flow values even though it is close to the ground. Possibly ignoring values if they are below e.g. 5 cm would improve things.
Thanks, tobias. So how can I modify the code to ignoring values below some heights?
by Barry
Tue Oct 12, 2021 11:17 am
Forum: Developer Discussions
Topic: Multiranger deck wrong distance measurement
Replies: 3
Views: 451

Multiranger deck wrong distance measurement

Dear all, I got some issues with the multiranger deck: When I used the python scripts as below: I put the crazyflie in the corridor without any obstacle. The distance to the wall is far than 4m. cflib.crtp.init_drivers() with SyncCrazyflie(URI, cf=Crazyflie(rw_cache='./cache')) as scf: with Multiran...
by Barry
Tue Oct 12, 2021 8:26 am
Forum: Loco Positioning System
Topic: Take Off Drift Issue
Replies: 5
Views: 810

Re: Take Off Drift Issue

Thanks tobias, I was only equipped with the flow deck on the crazyflie bolt. I have made some modifications to the flowdeck_v1v2.c and zranger2.c In flowdeck_v1v2.c, I set useAdaptiveStd = true and set OULIER_LIMIT 200 In zranger2.c, I set: static const float expPointA = 6.0f; static const float exp...
by Barry
Fri Oct 08, 2021 2:16 am
Forum: Loco Positioning System
Topic: Take Off Drift Issue
Replies: 5
Views: 810

Take Off Drift Issue

Dear all, I have made a new drone using the bolt. While when I run the example: flowsequenceSync.py. During the takeoff, the drone drifts too much. But when I try to decrease the flying time during the takeoff, the drift issue will be mitigated. It looks like the drone will take off much faster than...