| 摘要 |
<p>The device has sensors (5) arranged in opposite goal posts (1), and an evaluating unit (7) for assigning co-ordinates of an entry position and entry speed of a special object to preprogrammed values. The co-ordinates and/or the values are separated and transmitted to a display unit (8) and are optically and acoustically realized in the display device. The sensors radiate and receive infrared radiations with different frequencies, where the distance of the sensors from the goal post and a goal latch (2) is smaller than diameter of the object entering into a radiation grid.</p> |
