Laser positioner and marking method using the same
AssigneesSato Kogyo Co., Ltd., Mac, LLC
InventorsNobuyuki Fukunaga, Mutsuhiko Kimura, Yasuo Metoki, Takeo Saito, Yoshiaki Ishida, Kenji Miyahara
Life of this patent
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Abstract
A laser positioner is located at a survey base point for projecting a geodetic design pattern depicting design working points onto a working face remote from the base point by use of a laser pattern projector, upon surveying an object route by use of a laser surveying unit. In tunneling operations for example, the design pattern is formed on the working face, so that boring of the holes for charging explosives in the working face can be performed without paint-marking on the working face.
Claims11
A method for marking design points in a working face in a tunnel by use of a laser positioner comprising a laser surveying unit for effecting distance and angular measurements, a control system for determining the design points based on surveying data of the distances and angular measurements outputted from the laser surveying unit and controlling the laser surveying unit in measuring, and a laser pattern projector for forming a pattern representing the design points on the working face to be marked, said methods comprising:
- performing a geological survey and a soil analysis to plan and execute designs so as to determine design data representing the number and locations of points where explosive charging holes are to be bored at different locations along a design route of the tunnel;
- locating said laser positioner at a base point;
- locating reflector targets at reference points;
- operating said laser surveying unit to direct a laser beam to the reflector targets so as to measure the distances and angles of the laser surveying unit relative to the respective targets to obtain absolute coordinates of the working face;
- inputting to said control system said design data for determining points at which the desired explosive charging holes are to be bored in the working face and obtaining control signals for operating the laser pattern projector;
- inputting the control signals to the laser pattern projector to form a laser pattern indicating concurrently the locations of all the explosive charging holes to be bored in the working face;
- and
- carrying out boring work, while projecting the laser pattern to optically mark the design points on the working face, to form the holes for charging the explosives in the working face.
An apparatus for use in marking an object face, comprising:
- a reflector target adapted to be positioned relative to the object face;
- a laser surveying means for issuing a first laser beam toward said reflector target and receiving a reflection of said first laser beam from said reflector target to measure distances and angles of said reflector target relative to said laser surveying means, in order to determine surveying data for the object face;
- control means for determining, on the basis of said surveying data determined by said laser surveying means, design points on the object face;
- a laser pattern projector including a laser output means for outputting a second laser beam toward the object face, and a laser deflection means for deflecting said second laser beam;
- and
- wherein said control means is further operable to control said laser deflection means to continuously deflect said second laser beam in such a manner as to project a pattern representing the design points onto the object face.
A method for marking design points on an object face, comprising:
- positioning reflector targets relative to the object face;
- operating a surveying laser unit to issue a first laser beam toward the targets and receive a reflection of said first laser beam from the targets, to measure distances and angles of said targets relative to said surveying laser unit, in order to determine surveying data for the object face;
- determining, on the basis of said surveying data, design points on the object face;
- and
- operating a laser pattern projector to output a second laser beam toward the object face and continuously deflect said second laser beam in such a manner as to project a pattern representing the design points onto the object face.
Dependencies are inferred from the claim text.