Impact position detector esp. of darts on dart board - uses two motor driven carriers at right angles for optical light barriers and monitors pulsed beam source and receiver with beam interruption signal data acquisition and processing device

摘要

The detector monitors the board with a pulsed beam from a source on a movable carrier also carrying a receiver arranged diametrically opposite. The interruption of the beam by a dart triggers a pulse detected by a data acquisition and processing device. The detected values are converted into coordinates of the impact point which are displayed. Two mutually independently longitudinally movable carriers (16) are arranged perpendicular to each other, each with a separate motor (19) drive and a displacement monitor (22). ADVANTAGE - Prevents rotation of carrier.