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Pernambuco
About Me:
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Please tell us a bit about your UAV interest
http://www.cridea.com.br
Hometown:
Recife
Activity Feed
"Brandon,
The image is a real RTK used to get ground truth for the positions. It depends on the environment whether antennas need to be slightly elevated. Any type of vegetation or trees can obscure the signals or decay them, which decreases results,…"
The image is a real RTK used to get ground truth for the positions. It depends on the environment whether antennas need to be slightly elevated. Any type of vegetation or trees can obscure the signals or decay them, which decreases results,…"
"David,
So did you try to allocate resources as indicated here?
https://support.pix4d.com/hc/en-us/articles/202560199
The support guy doesn't seem to understand the problem outline very well, so the answer is not very precise, but in answer 1 he says…"
So did you try to allocate resources as indicated here?
https://support.pix4d.com/hc/en-us/articles/202560199
The support guy doesn't seem to understand the problem outline very well, so the answer is not very precise, but in answer 1 he says…"
"$6000 is already quite a high amount for a reasonable station. I probably spent $2000 on my setup and it's doing very well, built it myself from components bought online at cheaper alternatives.
Pix4D has a page about their recommendations:…"
Pix4D has a page about their recommendations:…"
"I did use that A4960 chip, but had to dump it because it was taken off the market and also it's not suitable for projects that involve this kind of motor drive. What you could do is look for A4960 projects (they are around) and look into the source…"
"Hi Jure,
I noticed the freescale libraries later on. Part of the exercise was to implement this myself and if you look at the algorithm, it looks pretty trivial. The thing you do need is a good processor with floating point.
Symptoms of the…"
I noticed the freescale libraries later on. Part of the exercise was to implement this myself and if you look at the algorithm, it looks pretty trivial. The thing you do need is a good processor with floating point.
Symptoms of the…"
"Btw, one of the things I didn't even get close to was a technique to further improve the efficiency of the ESC. Most implementations use a simple PWM scheme for the motor actuation. When vector control is already used, most of the computational…"
"The ground pad was soldered. The docs contain the datasheets with additional info on the BoostXL board (the board that has the driver chip pre-soldered), which contains more info on how to route, solder and place components.
The chip was soldered…"
The chip was soldered…"
So almost a year ago, I posted about how I started work on a field oriented control ESC:Redesigning multirotor ESC'sSome people in the comments already said how they made their own or started work on different ESC's. I went through 5 iterations of…
"Where's the antenna on this thing? If the antenna is in the device, it probably still gets a lock, but your precision significantly suffers because it doesn't have an unobscured view."
"Well, I did some searching around and these low level interfaces are great when you have hardware that interfaces with it and know what to do (have an oscilloscope, plenty of patience, etc). The raspi cam is specifically for the raspi and the csi-2…"
Above is a fullsize image of a 5MP webcam. A webcam usually has a CMOS sensor and commercial ones support up to 720p resolution. 720p is a result of the usb bus bandwidth available to stream the images and since many computers still use USB 2.0,…
"I don't mean it's inaccurate, but it says that the FAA would more than likely not allow it "on the application", plus the state law of $1000 per picture. Then in 2, it says they work "within the rules". If the application is disallowed, then 2 is…"
"If the FAA doesn't allow it, then nobody can, so 1 and 2 are somewhat mutually exclusive.
For 3 he has a point I think. If you are new to the technology, don't expect to get really great results the first time. you need to ramp up your experience,…"
For 3 he has a point I think. If you are new to the technology, don't expect to get really great results the first time. you need to ramp up your experience,…"
"A big rubber mat that can be rolled up or separated into parts, about 3m rectangular.
If you use CHDK, I believe there are also options to have it respond to signals over USB, but not sure if this is part of the uav script now. This is done by…"
If you use CHDK, I believe there are also options to have it respond to signals over USB, but not sure if this is part of the uav script now. This is done by…"
"Very nice. Years ago, I used libchamplain a lot, which has support for lines, polygons and animated markers, but that hasn't been updated in a while. Very useful if you want to visualize things that are going on in a mission."
"No, you need an app to do photogrammetry for that. See the wiki of project-ion above and the processing of data section. It shows some tools you could use for that."
