RF Tracking System

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Chriky
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Re: RF Tracking System

Post by Chriky »

Krenzo wrote:BRB, going to Seattle ;)
Valve?

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Re: RF Tracking System

Post by remosito »

Chriky wrote:
Krenzo wrote:BRB, going to Seattle ;)
Valve?
Need to do some serious Voodoo tonite for it being Valve and not MS!
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Re: RF Tracking System

Post by Krenzo »

Here's a hint.
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nateight
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Re: RF Tracking System

Post by nateight »

Krenzo wrote:[GabeN]
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Chriky
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Re: RF Tracking System

Post by Chriky »

Yay well done :D

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Re: RF Tracking System

Post by Krenzo »

So I went there and demonstrated my system to them on Thursday and Friday. Even though it still has a lot of work left to be done, they were impressed and said they can't wait until they can buy one.

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Re: RF Tracking System

Post by FingerFlinger »

Awesome Krenzo, that's really exciting!

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Re: RF Tracking System

Post by MSat »

That's really sweet! But it doesn't sound like they're interested in taking you on-board and further developing it in-house, huh? If not, I hope you can assemble a team and at least target the professional market first. It seems like it would be more robust than IMU-based mocap as well as being less tedious to set up than optical based systems.

How cheap do you think you can get a single wired node device down to?

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Re: RF Tracking System

Post by Krenzo »

Valve is an odd place in terms of how they do business ie hire up the absolute most intelligent and capable people and then let them roam free and see what they produce. I think they know VR/AR is a long ways off, and I don't think they're eager to buy up somebody in the VR marketplace. They're very much in the research phase and just seeing what happens. They've only bought people who clearly have something that is a home run (mods like Counterstrike and Dota 2). Also, why buy my project up when they can continue to work on their own project while I work on mine separately? Keeping them separate increases the chances that there will be a viable tracking system in the future.

I'm aiming for something around $300 that's a devkit.
Last edited by Krenzo on Sun Jun 09, 2013 8:28 pm, edited 1 time in total.

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Re: RF Tracking System

Post by mickman »

I'd scoop up a dev-kit straight up... sure would be nice if it were Unity enabled... which I think it already is, yes ?
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Re: RF Tracking System

Post by Krenzo »

Unity and UDK are supported at the moment.

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Re: RF Tracking System

Post by KuDeSnik »

Hi, Krenzo! Have you tested such system with transmitters placed in the corners of the room (ceiling one). Such placement gives better difference between signals Time-of-Arrival, as I understood. How does human body interfere signal?
We are from Russia and we produce training systems, don't you want to sell us early prototype of this device for our internal purposes (with corner mounted transmitters preferably, we need 10x10 meters area, two receivers). We are intersted to buy such devices from you (maybe non consumer version, for non consumer price), if you are interested to talk about, how can I contact you directly?

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Re: RF Tracking System

Post by Krenzo »

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Last edited by Krenzo on Wed Jan 21, 2015 4:43 pm, edited 1 time in total.

KuDeSnik
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Re: RF Tracking System

Post by KuDeSnik »

Well, we can made radio frequency licensing for your device in Russia if it will fit our goals. So you say, what better idea is to use 4 base stations in the corners with 4 transmitters on any of them? So one of them will be line-of-sight any time. Ok, if you say it is not ready for now, can you name any time to ask again?

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Re: RF Tracking System

Post by modeless »

Krenzo wrote:The human body does interfere with the signal. You can get away with a hand or arm in front of the signal, but it will add about an inch of inaccuracy to the position (with no other unoccluded transmitters to compensate). Anything more like a torso in the way will degrade the signal too much.
Could this be improved by using different (not unlicensed) spectrum? What would be the ideal spectrum to use if licensing constraints weren't an issue?

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Re: RF Tracking System

Post by Krenzo »

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Last edited by Krenzo on Wed Jan 21, 2015 4:43 pm, edited 1 time in total.

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Chriky
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Re: RF Tracking System

Post by Chriky »

Do you think its a major issue for ToF based systems? It's kind of like optical I suppose, apart from that it just degrades accuracy rather than making it totally impossible.

How expensive are the antenna theoretically (I mean if they were produced on a reasonable scale)?

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Re: RF Tracking System

Post by MrNexy »

@Krenzo

I'm really looking forward to seeing how this progresses , please up another video when you get the time :)

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Re: RF Tracking System

Post by Krenzo »

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Last edited by Krenzo on Wed Jan 21, 2015 4:43 pm, edited 1 time in total.

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Re: RF Tracking System

Post by thenomad »

How's this going? VERY excited to hear more news on this.

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Re: RF Tracking System

Post by MrNexy »

How goes it Krenzo ? Done that test yet ? Would love to see the results :)

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Re: RF Tracking System

Post by Krenzo »

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Last edited by Krenzo on Wed Jan 21, 2015 4:43 pm, edited 1 time in total.

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Re: RF Tracking System

Post by Krenzo »

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Last edited by Krenzo on Wed Jan 21, 2015 4:43 pm, edited 1 time in total.

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Re: RF Tracking System

Post by MSat »

Sounds awesome, Krenzo!

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Re: RF Tracking System

Post by cybereality »

Cool.

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Re: RF Tracking System

Post by BOLL »

This is exciting :) looking forward to seeing your progress!

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Re: RF Tracking System

Post by zalo »

Nice! I'm always very excited to hear news of your progress!

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Re: RF Tracking System

Post by I_want_immersive »

No news since last September?!

I hope Krenzo is still here. I am just curious how you capture the waveform like:
http://www.empiresmod.com/krenzo/10-17-2012/middle.png

Over-GHz ADC will be needed to capture that. Time stretch? How do you do that?

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Re: RF Tracking System

Post by Krenzo »

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Last edited by Krenzo on Wed Jan 21, 2015 4:44 pm, edited 1 time in total.

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Re: RF Tracking System

Post by MSat »

Good to know you're still working on it! Wish you success.

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Re: RF Tracking System

Post by Krenzo »

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Re: RF Tracking System

Post by FingerFlinger »

Sounds good. Will having multiple base stations primarily give you better coverage or higher resolution?

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Re: RF Tracking System

Post by Krenzo »

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Last edited by Krenzo on Wed Jan 21, 2015 4:44 pm, edited 1 time in total.

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Re: RF Tracking System

Post by I_want_immersive »

Thanks for the nice explanation. Keep up the good work. I am sure this technology is not only good for the gamers but is also useful in other applications.
Krenzo wrote:I'm sorry about the lack of updates. I feel like I should have progressed farther than I have, but since this thread has been bumped, I'll respond.

Subsampling techniques allow me to capture a GHz signal with a slower ADC. Because the signal repeats, I can take a sample of one part of the waveform and then take another sample when the signal repeats but at a different spot (slightly later). I can then reconstruct the whole thing after I've taken small shots of each part of the signal. The most practical use of this technique is in a stroboscope where flashing a light on a rotating object can make the object appear to be still or to be moving very slowly when the object is actually rotating very fast.

I had some frustrating bugs that I had to track down. RF can be very difficult to work with. I did not have enough shielding isolation between certain elements in my RF circuity, and there was interference being generated. This took a few months of designing and ordering revisions of a circuit board to try to fix the issue. I also had a software bug that took me awhile to track down. I did optimize the software of the system so that it's faster. Its update rate is about ten times faster now.

I just ordered more transmitter boards to have more than one base station to test and play around with.

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Re: RF Tracking System

Post by Davideus »

If you want to hit consumer market, you must use your technology in easy to understand and revolutionary products... for example VR gun with full positional tracking and strong recoil system or accurate VR gloves. This is the products that for now is missing in VR World.

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Re: RF Tracking System

Post by Krenzo »

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Last edited by Krenzo on Wed Jan 21, 2015 4:43 pm, edited 1 time in total.

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Re: RF Tracking System

Post by Krenzo »

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Re: RF Tracking System

Post by FingerFlinger »

What did you end up going with for flex sensors? Looks like resistive from your pic?

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Re: RF Tracking System

Post by Krenzo »

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Re: RF Tracking System

Post by equusvenustas »

hello krenzo, i would like to know how resistant is that composite to mechanical stress, customised 3D printed sensors sounds really good, you could make it to fit to any were

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