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Launch monitor from scratch - Page 2

post #19 of 24
Quote:
Originally Posted by RocketSci View Post

So, I want to build my own launch monitor absolutely from scratch.  Has anyone here ever tried this?

I found a thread here about someone that wanted to build their own, but apparently he wanted more of a simulator type of deal and not truly build one from scratch.  I think he later posted another thread on where he could find a launch monitor under $1,000.

I know what you guys are probably thinking: "this guy is crazy, there's no way you can build one from scratch..." Well, I am not crazy.

So I am calling out all of you geeky golfers out there, which I know there has to be a few.  I am just wondering if anyone has ever tried this.  I am basically looking for an affordable way to obtain a decent radar system with decent range (I tried eBay and craigslist, no luck).  I am looking for something with decent range (I'd like at least 100 yds, but I think I can do it with 50 yds) but I definitely don't think I'd need full shot range measurements.  I'd love something in the levels of the Trackman (they claim it's military-grade stuff) but that would cost me a lot more I think plus it might get me a knock on the door by the FBI... (or at least a phone call and a tail or something like that)

A little bit about me (just so you know I'm not crazy), I am a PhD student in aerospace engineering that tracks satellites for a living.  Basically, satellite tracking works by collecting measurements about the satellites flight characteristics, so technically I can do the same with a golf ball.  After all, that's exactly what these companies do anyways.  My programming background is fairly strong and my electronics background is decent enough but not that strong, but I still think I can handle a project like this.

Thanks for reading,
Ed

If you are working on it, i'm in.

I have been working on a 10Ghz patch array. However, based on some crude calculations and measurements, I think 24Ghz would be a minimum for accuracy.

Luckily, a simple homodyne circuit should work fine, since we are, generally measuring in one direction.

Let me know what you think.

Pm me your email.
post #20 of 24
Quote:
Originally Posted by ss4adam View Post

I would be interested. I am a 24 year old software engineer who currently works on android integrated with radars.  In my spare time i work with microcontrolers and rasbery pi stuff.  I think this is very doable as long as we have a senor that can detect spin (that i DO NOT know how to do.)  Launch angle and ball speed would be pretty easy.  Lets make this open source so others can also build these things with just a few hundred bucks at most

Spin is detected by the backscatter from the ball. Some type of fft anslysis no doubt.

The ball speed would be the main frequency shift with backscatter being in the higher frequency range.

I took some crude measurements with my patch array, looks like it should work, but we would need more sensitivity and lower noise on the Lna.

Work in progress.
post #21 of 24

I understand you are having "fun" but I have to point out.  I bought a functioning Vector Pro Photo based monitor for $900 on ebay.  It measure and calculates in 12" of ball flight.  The obvious benefit being that you can hit into a net in bad weather.

 

http://www.accusport.com/products/vectorpro

 

I believe you are after accuracy and for you to dial in your home made unit would take quite a bit of time.  I find the vector pro to be accurate enough to be very useful.

post #22 of 24
Quote:
Originally Posted by inthecup View Post

I understand you are having "fun" but I have to point out.  I bought a functioning Vector Pro Photo based monitor for $900 on ebay.  It measure and calculates in 12" of ball flight.  The obvious benefit being that you can hit into a net in bad weather.

 

http://www.accusport.com/products/vectorpro

 

I believe you are after accuracy and for you to dial in your home made unit would take quite a bit of time.  I find the vector pro to be accurate enough to be very useful.


What's the fun in that?

 

BTW, my radar array is collecting dust as I go play rounds every weekend. a1_smile.gif)

post #23 of 24

Sorry I don't mean to be the fun police.

 

My monitor does not get the use it gets in the winter.  I have a nice net setup.  Again a photo based solution  is better because it can work in a more compact space.

post #24 of 24
Quote:
Originally Posted by inthecup View Post

Sorry I don't mean to be the fun police.

 

My monitor does not get the use it gets in the winter.  I have a nice net setup.  Again a photo based solution  is better because it can work in a more compact space.


Your Vector Pro looks pretty nice. I might have to look for one too.

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