Laser beam detecting device for a construction machine

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;
• and
• 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 reference positions include a central standard position and first and second offset positions which are established respectively above and below the central standard position, and wherein the display includes three rows of light emitting elements for indicating three reference positions, and four sets 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.

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 wit 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 ranged 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 reference positions include a central standard position and first and second offset positions which are established respectively above and below the central standard position, and wherein the display comprises:
• first, second, and third rows of two or more LEDs, wherein the first row is adapted to activate one or more LEDs corresponding to a first reference position, the second row is adapted to activate one or more LEDs corresponding to a second reference position, and the third row is adapted to activate one or more LEDs corresponding to a third reference position;
• and
• at least four sets of one or more LEDs, wherein each of the rows is placed between adjacent two of the four sets.