| 摘要 |
Response to golf-ball landing-impacts within a landing area (4) is provided by mutually-spaced piezoelectric-cable sensors (1,2;11-14;21,22) to provide voltage signals that are analysed to determine impact-location in the area (4) in dependence upon their relative amplitudes, the peak-amplitude difference between the signals or upon the difference between their peak-amplitude averages, or their root-mean-squares. The sensors are arranged in concentric circles (1,2) or in straight, parallel lines (11-14); there may be two straight sets (21,22) orthogonal to one another. The analysis may involve determining whether the sum of two of the signals exceeds a threshold and whether their difference is positive or negative. Where there are more than two sensors (11-14;21,22) the signals of largest amplitude are selected for determining impact-location. |
