Automatic control system and method for joystick control-based construction equipment
AssigneeHyundai Heavy Industries Co., Ltd.
InventorsJong Chan LEE, Lim Gook CHOI, Young Min KWON, Jong Hyung YIM
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Abstract
According to the present invention, a hydraulic system of construction equipment is implemented as a close center system, which converts an input signal of an electric or hydraulic joystick into a speed signal of a work apparatus, and controls a speed of the work apparatus regardless of an external load condition, thereby minimizing fatigue of a worker to improve work efficiency, improving a work apparatus operation ability of an unskilled person, and patterning standardized work to implement automation of construction equipment.
Claims13
A system for automatically controlling construction equipment, to which a joystick is applied, based on a joystick control, comprising:
- a hydraulic pump (30, 300) configured to discharge working fluid within a hydraulic tank (20, 200) and supply the working fluid to an actuator (40, 400);
- the actuator (40, 400) configured to drive the construction work apparatus with the working fluid of the hydraulic pump (30, 300);
- first electronic hydraulic control valves (50 and 50′, 500 and 500′) installed in a piston-side inlet flow path (41, 410) and a rod-side inlet flow path (42, 420) connected from the hydraulic pump (30, 300) to the actuator (40, 400);
- second electronic hydraulic control valves (60 and 60′, 600 and 600′) installed in a piston-side outlet flow path (21, 210) and a rod-side outlet flow path (22, 220) connected from the actuator (40, 400) to the hydraulic tank (20, 200);
- and
- a control unit (70, 700) configured to independently control the first electronic hydraulic control valves (50 and 50′, 500 and 500′) and the second electronic hydraulic control valves (60 and 60′, 600 and 600′) connected to the actuator (40, 400).
A method of automatically controlling construction equipment based on a joystick control, comprising:
- a) converting a signal generated by an operation of a joystick lever of a construction work apparatus into an electric signal, and inputting the electric signal (S10, S100);
- b) converting the electric signal of the joystick lever into a speed signal of the construction work apparatus (S20, S200);
- c) selecting an automatic excavation function of the construction work apparatus (S30, S300);
- d) storing an operation signal of the joystick lever (S40, S400);
- e) performing automatic excavation (teach & play back) by the construction work apparatus (S50, S500);
- f) generating control signals of a pump and an electronic hydraulic valve according to the pre-stored operation signal of the joystick lever (S60, S600);
- and
- g) driving actuators of the construction work apparatus (S70, S700).
Dependencies are inferred from the claim text.