The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 2000
Filed:
Apr. 15, 1998
F Jack Purchase, Unionville, CA;
Ross A Poole, Newmarket, CA;
Ainsworth Inc., Aurora, CA;
Abstract
The vehicle guidance system is provided for guiding a vehicle, such as a load haul dump vehicle in an underground mine. An elongate element, for example in the form of a rope or the like is aligned with the path of the vehicle and is suspended above the path. The element includes a fluorescent material which absorbs radiation at one frequency and radiates radiation at a second, lower frequency. The vehicle includes a lamp for illuminating the element at the first frequency, e.g. ultraviolet light, and a camera or other detector to detect the second frequency, which may be in the visible spectrum, radiated from the elongate element. The relative position of the elongate element and the image provided by the detector is used to steer the vehicle to keep it on the desired path. The elongate element can be provided with portions that radiate different frequencies in response to the first frequency, which different frequencies are used to provide additional information, e.g. an indication of branch paths.