Leveling control system and method for heavy equipment
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-007/70
G06F-019/00
G06G-007/00
G06G-007/76
G01D-005/00
출원번호
US-0326375
(2008-12-02)
등록번호
US-8195367
(2012-06-05)
우선권정보
KR-10-2007-0129044 (2007-12-12)
발명자
/ 주소
Kim, Jin Seop
Lee, Chang Soo
Kim, In Woo
출원인 / 주소
Volvo Construction Equipment Holding Sweden AB
대리인 / 주소
Ladas & Parry LLP
인용정보
피인용 횟수 :
8인용 특허 :
1
초록▼
A leveling control system and method for heavy equipment, in which a lower frame having a traveling unit and an upper frame are combined together by a tilting unit. The system includes a sensor unit, provided in the equipment, for measuring twist angles of the lower frame and the upper frame against
A leveling control system and method for heavy equipment, in which a lower frame having a traveling unit and an upper frame are combined together by a tilting unit. The system includes a sensor unit, provided in the equipment, for measuring twist angles of the lower frame and the upper frame against a reference horizontal surface and a traveling speed of the equipment, and detecting working state information of working devices; a control unit for receiving the twist angles, the traveling speed, and the working state information, calculating a correction angle for the leveling control of the upper frame, and generating a control signal for instructing an operation of an actuator in accordance with the correction angle; and a driving unit for performing the leveling through the actuator in accordance with the control signal received therein. The control unit is provided with an auto leveling mode module for performing the leveling against a reference horizontal surface, a re-leveling mode module for performing the leveling against the reference horizontal surface in a standstill state of the equipment for a limited time, and a track leveling mode module for performing the leveling against the lower frame.
대표청구항▼
1. A leveling control system for controlling automatic leveling of heavy equipment with a lower frame and an upper frame, the lower frame having traveling means, and the upper frame tiltably and swingably connected to the lower frame, the leveling control system comprising: a sensor unit, provided i
1. A leveling control system for controlling automatic leveling of heavy equipment with a lower frame and an upper frame, the lower frame having traveling means, and the upper frame tiltably and swingably connected to the lower frame, the leveling control system comprising: a sensor unit, provided in the equipment, for measuring twist angles of the lower frame and the upper frame against a reference horizontal surface and a traveling speed of the equipment, and detecting working state information of working devices;a control unit for receiving the twist angles, the traveling speed, and the working state information, calculating a correction angle for the leveling control of the upper frame, and generating a control signal for instructing an operation of an actuator in accordance with the correction angle, the control unit including an auto leveling mode module for performing the leveling against a reference horizontal surface, a re-leveling mode module for performing the leveling against the reference horizontal surface in a standstill state of the equipment for a limited time, and a track leveling mode module for performing the leveling against the lower frame; anda driving unit for performing the leveling through the actuator in accordance with the control signal received therein;wherein the control unit comprises:a receiving module for receiving the twist angles against a reference horizontal surface, the traveling speed, and the working state information from the sensor unit;a correction angle calculation module for setting the twist angle of the upper swing structure as a first twist angle, and calculating the correction angle, at which the upper swing structure is to be rotated, based on the first twist angle;a control signal generation module for generating the control signal in accordance with a region, in which the actuator is to be operated, based on the correction angle;an output module for transmitting the control signal to the driving unit;a time limit module for counting an operation time in a standstill state of the lower frame, comparing the counted operation time with a predetermined reference operation time, and terminating the leveling control if the operation time is more than the reference operation time; anda display signal generation module for generating a display signal for displaying the twist angles of the lower frame and the upper swing structure through a display unit provided with an image display device. 2. The system of claim 1, wherein the control unit further comprises an emergency stop module for immediately terminating the leveling control if an emergency stop condition is satisfied in the auto leveling mode, the re-leveling mode, or the track leveling mode. 3. The system of claim 1, wherein, if the auto leveling mode or the re-leveling mode is activated, the correction angle calculation module calculates the correction by calculating “twist angle of lower frame−maximum allowable lower limit twist angle range−first twist angle” in the case where the reference angle is “reference angle
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