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US 12,673,857 B2Granted
OHT vehicle and method of controlling operation of the same
AssigneeSemes Co., Ltd.
InventorsJun Beom Lee, Dong Hoon Yang
Life of this patent
Estimating the term…
Abstract
Proposed are an OHT vehicle and a method of controlling the operation of the same. More particularly, proposed is a technology in which when a steering change is not performed properly as a steering wheel is adhered to a damper during the operation of a steering unit of an OHT vehicle, a dithering motion function is applied to the steering wheel to enable an efficient steering change of the OHT vehicle.
Claims20
A method of controlling operation of an OHT vehicle, the method comprising:
- a steering wheel movement determining step of determining a moving direction of a steering wheel in accordance with a traveling direction of the OHT vehicle in a branching region of a rail;
- determining whether the steering wheel is an immovable state;
- a dithering motion applying step of applying, in response to the determining that the steering wheel is in the immovable state, a dithering motion to the steering wheel;
- and
- a steering wheel moving step of moving the steering wheel in accordance with the traveling direction of the OHT vehicle.
2 more elements
An OHT vehicle comprising:
- a traveling unit configured to travel along a rail;
- a steering unit including a steering wheel and configured to change a traveling direction of the traveling unit;
- and
- a control unit configured to:
- determine a moving direction of the steering unit in accordance with the traveling direction of the traveling unit in a branching region on the rail, and
- determine whether the steering wheel is an immovable state,
- control, in response to determining that the steering wheel is in the immovable state, a dithering motion of the steering unit and movement of the steering unit.
4 more elements
A method of controlling operation of an OHT vehicle, the method comprising:
- a steering wheel movement determining step of determining a traveling direction of the OHT vehicle in a branching region on a rail and determining whether it is necessary to move a steering wheel in accordance the traveling direction of the OHT vehicle on the basis of a current position of the steering wheel;
- determining whether the steering wheel is an immovable state;
- a dithering motion applying step of applying, in response to the determining that the steering wheel is in the immovable state, a dithering motion to the steering wheel by sequentially and repeatedly applying to a steering wheel driving means, a forward dithering current corresponding to a moving direction of the steering wheel and a reverse dithering current for a set dithering time;
- and
- a steering wheel moving step of applying to the steering wheel driving means, a moving current corresponding to the moving direction of the steering wheel to cause the steering wheel to be moved, and applying a holding current to cause the steering wheel to maintain its position.
2 more elements
Dependencies are inferred from the claim text.