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:
Jul. 26, 2011
Filed:
Dec. 14, 2007
Masayuki Tanaka, Sagamihara, JP;
Akiko Shinozaki, Sagamihara, JP;
Jun Ota, Tokyo, JP;
Tsai-lin Chou, Tokyo, JP;
Masayuki Tanaka, Sagamihara, JP;
Akiko Shinozaki, Sagamihara, JP;
Jun Ota, Tokyo, JP;
Tsai-Lin Chou, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A system for detecting actual position of a material handling vehicle in a warehouse in which a plurality of racks composed of upright frame members and lateral frame members connecting the upright members are installed so that material handling vehicles can travel along the passageway between the racks so that current position of the material handling vehicle in the warehouse can be detected with increased reliability even if some of the reflections fail to be received by the sensors. Reflector plates are attached to each of the upright frame members and the lateral frame members along longitudinal direction thereof, sensors are attached to the vehicle, and a controller is installed on the vehicle to estimate current location of the vehicle based on combination of the number of reflections actually received by the reflector plates and counted by the controller.