WORKLOAD DETECTION DEVICE FOR EXCAVATION AND LOADING MACHINE

摘要

PURPOSE: To enhance measurement accuracy and reduce cost by calculating the weight of earth and sand in a bucket based on a bottom pressure of a cylinder which swings the bucket vertically and, what is more, estimating its weight and detecting the amount of earth and sand to be transported for one day. ;CONSTITUTION: A bucket position arithmetic operation section 15 of a controller 14 is designed to calculate the position of a bucket 9 and correct the computed value based on a car body slanting angle of a car body clinometer 16. Then, the bottom pressure of a boom cylinder 6 is continuously measured. The pressure before and after a period of time before a specified time is measured from the time when a bucket dump signal is input and its mean value is specified as a bottom pressure of the cylinder 6. Then, the weight of earth and sand in the bucket 9 is calculated based on the bottom pressure and the bucket position. This weight is estimated consecutively at an estimation section 31 and finally it is turned in a total weight of earth and sand loaded in dump trucks for one day. This construction makes it possible to detect the weight of earth and sand with high accuracy without installing an expensive loadage measurement device to a dump truck.;COPYRIGHT: (C)1994,JPO&Japio