Construction management device null of dynamical pressure dense

摘要

PURPOSE:To exactly obtain the settling amount of a hammer by a method in which arithmetic units for moving amount and settling amount are provided, the position is detected, and the settling amount is corrected to calculate a true settling amount of the hammer. CONSTITUTION:When a hammer 5 is wound up to a given level, the winding operation is stopped and the hammer 5 is automatically dropped. The settling amount H of the hammer 5 is obtained by adding the settling amount of a crane to the absolute value D of count value of winding, and the settling amount of the crane is calculated from the varying amount of a boom 4 with the settling of the crane. The settling amount can thus be exactly measured without committing error in measured values even when the working machine settles down under its own weight.