| 摘要 |
A system for the accurate electronic detection and location of missiles, such as darts, is disclosed in which electromagnetic radiation is transmitted through a dart board to signal receiving elements positioned on the side of the dart board opposite the target face and the change in electromagnetic signal is detected when a dart is embedded in one of the dart board target areas. The larger signal receiving elements of the dart board are divided into signal sensing portions which are electrically distinct from adjacent smaller signal receiving elements of the target and also the remainder of the total area of the larger signal receiving element, and the sensing portions are located adjacent the smaller signal receiving elements of the target to improve the accuracy and reliability of the electrical scoring of the darts which become embedded in or close to the smaller signal receiving elements.
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