| 摘要 |
<p>A vehicle visual aid system for ground manoeuvres employing a plurality of load sensors (10) disposed in or on the ground along a predetermined path to be followed by the vehicle. An illuminated display device (38) is disposed externally of the vehicle at a position forward of the vehicle when following the predetermined path. The display device (38) is coupled to the sensors (10) and is adapted to indicate visually to the person in control of the vehicle the prevailling position of the vehicle relative to the path. The invention also includes a load sensor unit for use in the visual aid system. The load sensor unit comprises en elongate trough-shaped base (14) for mounting in the ground and having an elongate loadreceiving member (28) of inverted trough-shape which is resiliently supported above the base (14) by means of mass (30) of solid, elastic compound disposed over a mass (34) of foam material. One or more proximity detectors are disposed in the unit for detecting and responding to predetermined downward displacement of the load-receiving member towards the base.</p> |
