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. 10, 2012
Filed:
Feb. 26, 2010
Kaoru Kumagai, Tokyo-to, JP;
Kunihiro Hayashi, Tokyo-to, JP;
Fumihiko Kamizono, Tokyo-to, JP;
Kabushiki Kaisha TOPCON, Tokyo-to, JP;
Abstract
The present invention relates to a surveying system, comprising a rotary laser irradiation deviceinstalled at a known point and used for projecting two or more fan-shaped laser beamswith at least one of the fan-shaped laser beams tilted and for forming a laser reference plane, a photodetection device, which is mounted on a mobile support member, for receiving the laser beam and for calculating an elevation angle at a photodetecting position, and a monitor photodetection deviceinstalled at a known position within the laser reference plane, wherein the monitor photodetection device has a monitor photodetection sensor for sensing and detecting the laser beam, a storage unit for storing a reference value of the laser reference plane, an arithmetic control unit for calculating positional changes over time of the laser reference plane based on the result of photodetection by the monitor photodetection sensor and on the reference value, and a transmitting unit for transmitting the positional changes over time to the photodetection device and/or to the rotary laser irradiation device as compensation information.