Goal or no goal? In response to this question, world football association FIFA wants to use technical assistance in the future. In its meeting of Thursday 5th July 2012 the International Football Association Board (IFAB), the body which determines the laws of the game, approved both goal-line technologies GoalRef and Hawk-Eye.This approval is subject to a final installation test at each stadium before the systems can be used in “real” football matches, in accordance with the FIFA Quality Programme for GLT.
FIFA, football’s world governing body, and a member of the IFAB has decided to use both goal-line technology systems from GoalRef and Hawk-Eye at the FIFA Club World Cup in Japan in December this year. The GoalRef system was developed by researchers from the Fraunhofer Institute for Integrated Circuits IIS. “The technology works in a similar way to that of the theft pr otection of a department store,” explained René Dünkler, spokesman of the GoalRef project. Ten antennae behind the goalpost and crossbar create and monitor a weak magnetic field. As soon as the ball nears the goal-line the field is influenced by thin spools in the football. A processor is then able to determine, by means of the antenna signal, whether the ball fully crossed the goal-line or not. “GoalRef is a bit like an invisible curtain which hangs behind the crossbar and the goal-line. As soon as the ball fully passes through this ‘curtain’, it is recognised as a goal,” says Ingmar Bretz, project head of GoalRef. The system then automatically sends this information in real time via encoded radio signals to the referees whose special wrist watches display the result visually and by means of vibration.
More information: http://www.iis.fraunhofer.de/en/bf/ln/referenzprojekte/goalref/index.jsp