| 摘要 |
The system enables an accurate spatial referencing of a direction associated with a moving body, eg. a helmet aiming sight. It uses two sensors (3A, 3B) of solid matrix (7A, 7B) type made of charge-coupled devices. These sensors are carried by the structure eg. an aircraft cockpit, and are advantageously formed by miniature cameras. The helmet (2) carries light-emitting bands placed parallel to the direction (DR) to be referenced, these bands being made from either a fluorescent or back-reflecting material. In the latter case, a light-emitting source (15) eg. infrared, is used to illuminate them. The referencing is based on the fact that the analysis of the image of the bands on the sensors enables the definition of at least two secant planes (PA, PB, Fig.3, not shown) each passing through any of the image bands and the associated corresponding optical centre and that their straight line of intersection is a line parallel to the direction to be referenced. A less accurate system employing but one sensor (Fig. 4, not shown) is also described.
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