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:
Apr. 04, 1995
Filed:
Mar. 03, 1993
Leigh E Sherman, Quakertown, PA (US);
Other;
Abstract
A wire guidance apparatus for an automated guided vehicle which comprises a first crossed coil sensor for acquiring a wire and tracking along curves in the wire as the vehicle is travelling in the forward direction, a second crossed coil sensor for acquiring the wire and tracking along the wire when the vehicle is travelling in the reverse direction, third and fourth sensors for tracking along straight runs in the wire and circuitry for switching between the crossed coil sensors and the third and fourth sensors. Circuitry is also provided to generate a guidance error signal from the outputs of either of the crossed coil sensors or both the third and fourth sensors. The guidance error signal is then used to control a motor connected to a steerable wheel of the vehicle to maintain the vehicle in alignment with the wire.