Patent ID: 6262801
Filing Date: 2001-07-17
Classification: E03B,E03F,G01C

Abstract:
A laser reference level setting device, comprising a laser beam emitting means rotatably supported for emitting a laser beam toward a target having a reflection surface for indicating a given position thereon, a light receiving means for receiving a reflection laser beam from said target, a driving unit for rotating said laser beam emitting means in upward and downward directions and in left and right directions toward an irradiating direction, a control unit for calculating the irradiating position of the laser beam on the target according to a light receiving condition of said light receiving means about said reflection light beam from said reflection surfaces of said target and for controlling said driving unit so as to direct the laser beam to a given position on the target based on a result of said calculation, a tilt sensor which is rotatably supported in said upward and downward directions with respect to said laser beam emitting means and detects a horizontal position, a tilt angle detecting means for detecting an upward and downward rotating angle between said laser beam emitting means and said tilt sensor, and a display unit for displaying said upward and downward rotating angle as a tilt angle of said laser beam when said tilt sensor is made in a horizontal position.