Patent ID: 6016455
Filing Date: 2000-01-18
Classification: G01C

Abstract:
An automatic control system for a construction machine, comprising:a ground leveling implement, a target, and a laser sensor provided in said construction machine;a survey unit for projecting a laser beam indicating a finished-plane height toward said laser sensor, said survey unit having coordinate position measuring means for optically measuring a coordinate position of said target;storage means for storing finished-plane height data in correspondence with a horizontal coordinate position in said coordinate position;computation means for computing a finished-plane height at the horizontal coordinate position, based on determined finished-plane height data;modulation means for modulating said laser beam, based on construction information at said horizontal coordinate position, and for transmitting said construction information to said laser sensor; anddemodulation means for demodulating said construction information, based on the laser beam received by said laser sensor;wherein said survey unit is equipped with a finished-height data drive mode in which said laser beam is rotated in a vertical direction by rotation means so that a height of said laser beam at said horizontal coordinate position becomes a height from a determined finished plane and wherein said construction machine is provided with control means for controlling said ground leveling implement so that said ground leveling implement reaches said finished-plane height, based on a position at which said laser beam is received on said laser sensor, and also controlling said ground leveling implement, based on demodulated construction information.