Disclosed herein is a controller of a hoist. The controller of the hoist includes a lift up button which is adjustable in a pressed degree; a lift down button which is adjustable in a pressed degree; a lift up switch disposed below the lift up button so as to be immediately operated when the lift up button is pressed; a lift down switch disposed below the lift down button so as to be immediately operated when the lift down button is pressed; a magnet body connected to both of the lift up button and the lift down button and disposed to descend during a pressing operation of the lift up button or the lift down button; and a Hall sensor disposed to correspond to the magnet body so as to detect a descending degree of the magnet body being pressed by the lift up button or the lift down button.

Embodiments of this document provides improved safety logic for a mobile container handler of the reach stacker or top pick type. The improved logic involves limitations surrounding the hoist function of the machine subsequent to attaching to a shipping container. This improvement addresses damage to the container spreader caused by abrupt joystick hoist inputs by the operator immediately subsequent to attaching onto a shipping container. Due to space between the spreader arms and spreader body, which is so designed to facilitate movement of the arms inside the spreader body, sudden vertical movement of the spreader results in impact forces being exerted on various parts of the spreader body and spreader arms. These impacts accelerate fatigue leading to premature catastrophic failure of the spreader body and/or spreader arms' structural steel.

Embodiments of this document provides improved safety logic for a mobile container handler of the reach stacker or top pick type. The improved logic involves limitations surrounding the hoist function of the machine subsequent to attaching to a shipping container. This improvement addresses damage to the container spreader caused by abrupt joystick hoist inputs by the operator immediately subsequent to attaching onto a shipping container. Due to space between the spreader arms and spreader body, which is so designed to facilitate movement of the arms inside the spreader body, sudden vertical movement of the spreader results in impact forces being exerted on various parts of the spreader body and spreader arms. These impacts accelerate fatigue leading to premature catastrophic failure of the spreader body and/or spreader arms' structural steel.

A boom arm sensor assembly is provided. The boom arm sensor assembly includes a proximity sensor. The proximity sensor detects whether a boom arm for a trailer is positioned within a saddle on the trailer. The boom arm sensor assembly also includes a transmitter that transmits a signal at least when the boom arm is not detected in the saddle to a boom arm alarm assembly, which also is provided. The boom arm alarm assembly provides an alarm to a vehicle driver that the boom arm is not positioned within the saddle.

A boom arm sensor assembly is provided. The boom arm sensor assembly includes a proximity sensor. The proximity sensor detects whether a boom arm for a trailer is positioned within a saddle on the trailer. The boom arm sensor assembly also includes a transmitter that transmits a signal at least when the boom arm is not detected in the saddle to a boom arm alarm assembly, which also is provided. The boom arm alarm assembly provides an alarm to a vehicle driver that the boom arm is not positioned within the saddle.

According to various aspects, exemplary embodiments are disclosed of devices, systems, and methods related to controlling machines using operator control units and programmable logic controllers (PLCs). In an exemplary embodiment, a machine control system includes a machine, a programmable logic controller coupled to the machine, and an operator control unit. The operator control unit includes a user interface configured to receive one or more commands from an operator for controlling the machine, and a wireless interface configured to transmit a message based on the one or more commands received via the user interface. The programmable logic controller is configured to, in response to receiving the message transmitted by the operator control unit, transmit one or more control signals to the machine to control operation of the machine. The system does not include any machine control unit (MCU) separate from the operator control unit and the programmable logic controller.

Disclosed herein is a controller of a hoist. The controller of the hoist includes a lift up button which is adjustable in a pressed degree; a lift down button which is adjustable in a pressed degree; a lift up switch disposed below the lift up button so as to be immediately operated when the lift up button is pressed; a lift down switch disposed below the lift down button so as to be immediately operated when the lift down button is pressed; a magnet body connected to both of the lift up button and the lift down button and disposed to descend during a pressing operation of the lift up button or the lift down button; and a Hall sensor disposed to correspond to the magnet body so as to detect a descending degree of the magnet body being pressed by the lift up button or the lift down button.

Disclosed herein is a controller of a hoist. The controller of the hoist includes a lift up button which is adjustable in a pressed degree; a lift down button which is adjustable in a pressed degree; a lift up switch disposed below the lift up button so as to be immediately operated when the lift up button is pressed; a lift down switch disposed below the lift down button so as to be immediately operated when the lift down button is pressed; a magnet body connected to both of the lift up button and the lift down button and disposed to descend during a pressing operation of the lift up button or the lift down button; and a Hall sensor disposed to correspond to the magnet body so as to detect a descending degree of the magnet body being pressed by the lift up button or the lift down button.

A method for installing a rotor blade on a wind turbine, the rotor blade comprising a blade root for fastening the rotor blade to a hub, a blade tip facing away from the blade root, and a longitudinal axis running from the blade root to the blade tip, and the method comprising the steps of: hoisting the rotor blade using a crane, recording measurement data relating to the position and/or orientation of the rotor blade using at least one measuring means during the hoisting, and transmitting the measurement data to at least one monitoring station for monitoring the hoisting and/or to at least one control facility for controlling the position and/or orientation of the rotor blade.

A method for installing a rotor blade on a wind turbine, the rotor blade comprising a blade root for fastening the rotor blade to a hub, a blade tip facing away from the blade root, and a longitudinal axis running from the blade root to the blade tip, and the method comprising the steps of: hoisting the rotor blade using a crane, recording measurement data relating to the position and/or orientation of the rotor blade using at least one measuring means during the hoisting, and transmitting the measurement data to at least one monitoring station for monitoring the hoisting and/or to at least one control facility for controlling the position and/or orientation of the rotor blade.