This happens many times in football: Thousands of people inside the stadium and watching at home see the ball cross the goal-line, but the referee doesn’t see it. All those spectators are aggrieved, the goal isn’t given, and the whole course of the game or the tournament becomes a case of “what it might have been”. Frank Lampard’s disallowed goal against Germany in the 2010 World Cup (Video) is one such example.
Or sometimes, it’s the other way round. The referee does award the goal – one that the defending side insist should not be given. The Germans have a specific term for it: a “Wembley-Tor”, after the goal that gave England a 3-2 lead in the 1966 World Cup final (Video).
Many such incidents have forced Fédération Internationale de Football Association (FIFA) and the International Football Association Board (IFAB) to consider Goal Line Technology, which was introduced in football in 2012.
Goal-line technology is a system that determines whether the ball had crossed the goal line or not.
There are several systems approved for use by FIFA and IFAB, which are broadly based on camera-tracking or magnetic field sensors. The two most extensively used technologies for goal-determination are Hawk Eye and GoalRef.
The Hawk – Eye system is currently used by FIFA. It was first developed in 1999. Apart from football, Hawk-Eye is currently also used in cricket, tennis and snooker. In football, this system uses 14 high speed cameras, seven aimed at each goal. The visuals captured by the cameras are processed by a computer that isolates the ball’s movement and ignores the motions of players, referees, and other objects.
The computer then recreates a virtual picture of the ball and its actual position on the computer screen. This can be viewed from all angles and with an accuracy of 3mm to 5mm, helping the referees decide if the goal is scored or not.
The Goalref system has been tested in the Danish Superliga and at the 2012 Club World Cup and is much more economical as compared to Hawk Eye. This makes it easier to implement at the lower levels of the game – addressing concerns that goal-line technology would help bridge the gap between grassroots and Top Flight professional football.
This technology has a small passive electronic circuit embedded inside the ball that responds to a specific frequency of electromagnetic field.
The electromagnetic field is set up near the goalmouth in a plane defined by the goal posts and the crossbar and its strength is constantly monitored. (Pic below)
When the circuit inside the ball crosses the goal line, the electromagnetic field changes, and the referee gets notified by a radio signal transmitted to his or her watch.
Even though GoalRef is more economical, most major leagues and tournaments prefer Hawk Eye. The reason behind it is the fact that Hawk- Eye Technology offers a recreated virtual animation of the incident. The virtual animations can be shown immediately after a goal-line incident. There is no stoppage the game and as far as the viewers are concerned, the visuals make for a more convincing. This makes the referees decision clear and adds excitement to the game.
Although many say that human touch is lost, Goal Line Technology is helping the referees to make firm and accurate decisions.
Image Courtesy : Quora, FIFA & Daily Mail UK
https://spyn.co/blog/wp-content/uploads/Sportsbar-mumbai.jpg 600 1600 Tejasvi Lohia https://www.spyn.co/blog/wp-content/uploads/spyn_torchred.png Tejasvi Lohia2016-07-01 19:52:452018-05-01 06:21:40Watch Euro 2016 in these Mumbai Sports Bars
https://spyn.co/blog/wp-content/uploads/zcover.jpg 387 620 Ravindra Kumar https://www.spyn.co/blog/wp-content/uploads/spyn_torchred.png Ravindra Kumar2016-06-23 20:09:042023-11-29 17:47:575 Simple Tattoo Ideas for men
https://spyn.co/blog/wp-content/uploads/cover.jpg 3072 4608 Ravindra Kumar https://www.spyn.co/blog/wp-content/uploads/spyn_torchred.png Ravindra Kumar2016-06-19 12:40:352018-05-01 06:24:10Girls should NOT play these sports
5 Simple Tattoo Ideas for men