Automatic control system for construction machinery
US6171018A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1997 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Nov 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automatic control system for a construction machine includes the construction machine provided with a ground leveling implement, a target, and a laser sensor; a survey unit that has a coordinate position measuring element and projects a beam of tracking light indicating a finished-plane height toward the target; a storage unit for storing finished-plane height data in correspondence with a horizontal coordinate position in the coordinate position; and a computation unit for computing the finished-plane height data. The survey unit is equipped with a rotation unit for rotating the laser beam in a vertical direction so that a height of the laser beam at the horizontal coordinate position becomes a height from a determined finished plane. The construction machine is provided with a control unit for controlling the ground leveling implement so that it reaches the finished-plane height, based on a position at which the laser beam is received on the laser sensor. The computation unit computes a vertical deviation between a predetermined vertical position of the target and an actually measured value thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.