US 5,629,849 AGranted

Method for controlling operation of repeated work of excavator vehicle

AssigneeSamsung Heavy Industries Co., Ltd.

InventorSeong-Ho Ahn

Life of this patent

Estimating the term…

Loading patent…

Abstract

The present invention relates to a method for automatically controlling prescribed work to be repeatedly done by the excavator. An electronic control using a processor and sensors is used to precisely control the work under program control regardless of the hardness of the ground. The controlling method according to the present invention utilizes stored data of the position of each of the joints of the actuators when the prescribed work is performed. During the repeated work, each joint is able to maintain its desired position regardless of the hardness of the ground. Further, because the operational mode can be stored at the same time as storing of the data for the prescribed work, the invention compares the operational mode with the repeated work. The performance speed of the repeated work can be controlled as much as intended by the operator. The repeated work can be performed with high speed when an unskilled operator stores the operation of the prescribed work with a slow speed. The work efficiency of the excavator is enhanced.

Claims5

Dependent claims

A method for automatically controlling repetitive operations of a construction machine having a plurality of attachments, said method comprising:

storing during a teaching mode in a memory device a plurality of operational positions defined by manual actions of the attachments including attachment pivot angles of a boom, dipper stick and bucket and an angle of rotation of the construction machine of a work mode used in the construction machine to regulate fluid flow from a hydraulic pump according to a work load or a ground condition;
and
providing during a repetitive mode a repetitive operation control signal responsive to the stored angles and controlling a work mode of the attachments in accordance with the control signal to automatically perform a controlled operation of the manual actions of an operator during the repetitive mode and controlling a speed of the work mode performed by the construction machine during the repetitive mode by comparing a maximum flow rate of the hydraulic pump of the work mode in the teaching mode with a maximum flow rate of the hydraulic pump of the work mode in the repetitive mode to regulate the fluid flow from the hydraulic pump to cylinders to power the attachments according to the work load or the ground condition in the repetitive mode.

Dependencies are inferred from the claim text.

Facts

Application: 08/541,717Filed 10 Oct 1995 · continuation
Priority: KR 93-1219930 Jun 1993
Granted: 13 May 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

E02F 3/438
For dipper-arms, backhoes or the like: memorising movements for repetition, e.g. play-back capability
F15B 21/085
Servomotor systems incorporating electrically operated control means: using a data bus, e.g. "CANBUS"
F15B 21/087
Servomotor systems incorporating electrically operated control means: control strategy, e.g. with block diagram
G05B 19/427
Recording and playback systems, i.e. in which the program is recorded from a cycle of operations, e.g. the cycle of operations being manually…:…