Plan to use GPS technology in NRL footballs to track forward passes

[DC_fan]

http://forums.leagueunlimited.com/showthread.php?t=387825&highlight=FORWARD+PASSES&page=3

23-07-2011, 09:56 PM
DC_fan

Juniors

Join Date: May 2010
Posts: 1,460

Re: How do we fix bad forward pass calls?
Gps

Obviously the NRL have been reading my posts and stealing my ideas.

 

[docbrown]

http://forums.leagueunlimited.com/showthread.php?t=387825&highlight=FORWARD+PASSES&page=3




Obviously the NRL have been reading my posts and stealing my ideas.

Telecrap trolls here for story ideas. I said the same thing on that thread too.

 

[Ozzy]

Why not just use ulltra sonics or radar around the field to pick up the ball in relation to the player as he passes the ball. :sarcasm:

 

[counterpuncher]

Isn't this one of the only things we pay touch judges for? Do these blokes get dropped for missing the howlers as well?....we only ever hear about the refs.

If the touchies lifted their game, we wouldn't even need to discuss this.

 

[The Red Afro]

Why dont they just put an accelerometer in the ball?

If after Point A when a player passes the ball, the ball gains forward acceleration (ie. passed forward out of the hands) then it could alert an official.

Not sure how reliable it'd be, but it negates the use of satellites which have a tendency to be unfit during some weather/geographical limitations.

The technology will know the velocity of the ball BEFORE it is passed and if it accelerates towards the opposing try line when leaving the hands, it's a forward pass. If it travels forward but at a speed less than or equal to what it was when it left the hands, it'll be legal.
If it works, people will be shocked at just how far forward long passes travel whilst still being within the rules. People will swear the technology doesn't work.

If only the average league supporter understood a very basic concept in physics .

 

[Ozzy]

Why dont they just put an accelerometer in the ball?

If after Point A when a player passes the ball, the ball gains forward acceleration (ie. passed forward out of the hands) then it could alert an official.

Not sure how reliable it'd be, but it negates the use of satellites which have a tendency to be unfit during some weather/geographical limitations.




If only the average league supporter understood a very basic concept in physics .

Because you will get acceleration when you pass no matter what direction it will be passed.

 

[The Red Afro]

Because you will get acceleration when you pass no matter what direction it will be passed.

Yes, but that will be lateral acceleration.

 

[adamkungl]

Why dont they just put an accelerometer in the ball?

I suspect this is the actual tech in play. The article said

A signal is sent via satellite to computer grid in the video referee's box within a quarter of a second.

To me it sounds like that the satellite is merely a means of communication rather than the actual means of tracking the ball.

 

[westcorridor]

hmmmm not sure if this technology is necessary!

 

[Ozzy]

Yes, but that will be lateral acceleration.

An accelerometer will measure the G force not the direction.

 

[Ozzy]

I suspect this is the actual tech in play. The article said



To me it sounds like that the satellite is merely a means of communication rather than the actual means of tracking the ball.

They GPS uses satellite positions to locate a position of a unit on the ground.

 

[Ozzy]

hmmmm not sure if this technology is necessary!

It'll be a waste of money.

 

[The Engineers Room]

Why not use multiple camera angles to determine the inital forward speed of the ball and check it against the speed immediately after the ball is passed?

 

[Ozzy]

Why not just have robots programmed to pass backwards or at the most line balls?

 

[HowHigh]

Why not just have robots programmed to pass backwards or at the most line balls?

Or just get the captain of each team to have a game of NRL on the ps3. Winner gets the 2 points that round

 

[Apey]

The technology will know the velocity of the ball BEFORE it is passed and if it accelerates towards the opposing try line when leaving the hands, it's a forward pass. If it travels forward but at a speed less than or equal to what it was when it left the hands, it'll be legal.
If it works, people will be shocked at just how far forward long passes travel whilst still being within the rules. People will swear the technology doesn't work.

this ^

 

[Didgi]

Good to see everyone prepared to actually find out how it fully works before shooting it down.

 

[docbrown]

Why dont they just put an accelerometer in the ball?

From the presentation I saw, this is part of it. They need to know 4 components:

Initial location
End location
Initial velocity
Final velocity

 

[Patorick]

Doesn't cricket use Hawk-Eye?

You honestly expect Rothfield to know that?

 

[RufusRex]

suck it and see .. thats all ...

there has to be some serious physics involved. The coaches will then start to try and break it ...

What happens if a player is stationary, thrusts his hands forward quickly then pops the ball forward? extreme case i know.

Also if the sensors are on the surface of the ball then how does the spiral motion of the pass affect it - is it different for balls spinning clockwise/anti clockwise.

Finally, which ball is active - games are played with more than one ball .. would hate for the beeper to go off in a grand final because some ball boy is stuffing around with the ball 100m away from the play.

DEfinately worth investigating though.