Patent ID: 9068366
Filing Date: 2015-06-30
Classification: B66C,E04G

Abstract:
1. Mobile work machine having a chassis and having support booms, whereby the support booms are mounted, with a bearing-side end, on a swivel joint or slider joint fixed in place on the chassis, carry a telescoping support leg that can be supported on the subsurface at their free end, and can be moved out from a travel position, close to the chassis, into a support position, away from the chassis, by being pivoted, changing the basic angle between support boom and chassis, and/or by being telescoped, changing the length of their support boom between the bearing-side end and their free end, comprising three support-boom-related transmission and reception units, in each instance, for transmission and reception of running time signals or distance signals, with a first transmission and reception unit being disposed at a reference point on the bearing side, fixed in place on the chassis, in the immediate vicinity of the swivel joint or slider joint fixed in place on the chassis, a second transmission and reception unit being disposed at a reference point fixed in place on the chassis, disposed at a defined distance from the bearing-side reference point, and a third transmission and reception unit being disposed at a reference point in the vicinity of the free support boom end, fixed in place on the boom, in such a manner, in each instance, that their transmission signals can be alternately transmitted to the receiver of an adjacent transmission and reception unit, and whereby a microprocessor-supported evaluation unit that responds to the transmission and reception signals of the transmission and reception units, which are assigned to one another in pairs, is provided, which unit has a software routine for determining the coordinates of the boom-fixed reference point or the position of the support leg in a chassis-fixed coordinate system, and wherein the defined distance between the first bearing-side, chassis-fixed reference point and the second chassis-fixed reference point forms a reference distance for the other reception measurements.