Open fkaraokur opened 7 years ago
Same issue here. For now I just subtract a constant to compensate. I am wondering and searching what's the cause of this problem and how to fix also. Thanks for bringing up this question. Will update if I have anything new.
I think this is a chip fiasco. Because every time I switch the device on and off, the metrics change. So distance travel is not static but dynamic. That's why I can not develop a formula. I expect help from the master.
I have the same issue. The error varies between 0.5 to 0.75 meters. Do you have any idea how i can correct it please?
Do you have any idea how i can correct it please?
Hi @werty37 In my project I used a practical approach. I've measured the error for various distances (2-20m). Each measurement is represented by red plus symbol.
The error varies between 0.5 to 0.75 meters.
You're right here. I have the same issue. In general, I would say that DW1000 chip is inaccurate but quite precise (the results are repeatable). So it's not that bad ;)
Using this points I generate a function. I called it 'correction function'. I used 'polyfit' function in MATLAB to get this blue line on the graph.
Now we can finally make an use of the correction function.
I just subtract a constant to compensate. @kerr4huo
My method is an extension of your idea. It does NOT remove the measuring error but help to reduce it.
Piotr
Hi @prideofisland
That is a good idea. I will try to follow proper anchor positioning and then try your method. As of now i am trying to make the Ranging Anchor code on an ESP8266 since i will do the localization on the PC. If i am able to port it successfully, i will create a wiki/howto. Lets see.
Thanks S
How do I calibrate the dw1000 module? Will we do calibration for anchor and tag? Or are we going to make arrangements in the library? I measure 274 cm with my anchor. But the actual distance is 196.5.