A new integrated control system includes an outrigger control system that links outrigger extension to the load chart. The system is composed by one receiver and three transmitters for each outrigger. The transmitters are placed at full extension, mid extension and fully closed outrigger beam position. The receiver/transmitter connection is processed wirelessly to prevent the wear that would be caused by physical contact between the parts. Each outrigger’s receiver send a configuration signal to the central unit which regulates the maximum safety hoisting load, showing the information on the operator’s cab display. The load moment indicator takes also into consideration the information transmitted by the sensors placed on the boom, on the hoist unit and on the upperstructure slew bearing. The computer informs the operator of the safe working area, which can also be pre-set to suit the job site. It warns the operator with audio and visual signals if he goes outside the area.
The system also displays vehicle status, maintenance requirements, and sensor status.
In case of an LMI failure, the electronic bypass key restarts the machine movements for a pre-set time, while reducing crane speed to 25% of the normal value, and activates a buzzer and light. An independent circuit with black box/data logger functions records every occurrence. It is possible to download the stored data on laptops by a serial interface. The device features a self diagnostic function during the start up and cycle. The Safe Key housing includes the bypass and the data logger inside a single unit, protected by a locked plate.
