Patent ID: 6665067
Filing Date: 2003-12-16
Classification: E02F,G01C

Abstract:
A laser beam detecting device for a construction machine having a leveling implement, comprising:a beam sensor installable above the leveling implement of the construction machine to detect a laser beam as a reference, wherein the beam sensor has a wide detection range with a plurality of reference positions set at plural fixed positions to be selectively used as a standard position; a display for displaying information based on the laser beam detected by the beam sensor; and a selector for selecting one of the reference positions at the plural fixed positions as a standard position, the display having a plurality of light emitting elements which are arranged at a plurality of predetermined fixed positions in accordance with a predetermined pattern so as to represent the reference positions in such a manner that the pattern is recognizable by an operator on the construction machine, wherein the display includes a plurality of light emitting elements for indicating width and direction of offset of a laser beam position relative to the reference position selected by the selector, and wherein the light emitting elements for indicating the width and direction of offset include two sets of three light emitting elements arranged in a triangular shape.