Luffing angle measurement system

摘要

The luffing angle measurement system includes a non-contact distance measuring device (440) mounted on the nose section (405) of a first boom (400). The non-contact distance measuring device (440) measures either a distance to a second boom (430) pivotally connected to the first boom (400) or measures a time delay between the transmission of electromagnetic energy towards the second boom (430) and reception of electromagnetic energy reflected from the second boom (430). A controller (470) then converts the measured distance or the measured time delay into a luffing angle.