The technical solutions overview for rock mass measuring in the electric single-bucket excavators dipper

The productivity improving and energy efficiency of electric single-bucket excavators is associated with measuring the main indicator of excavator performance the rock mass in the bucket. The article provides an analytical review of studies by domestic and foreign authors in the field of measuring the rock mass in the bucket and industrial serial information and diagnostic systems of the power shovels and draglines in order to determine a promising direction of research. The technical solutions for measuring the rock mass in the bucket are classified according to the method of measuring the forces in the working equipment into direct and indirect. It is shown that the direct measurement of the forces in the working equipment is performed by a strain gauge force sensor in the hoisting rope, and the indirect measurement is performed by the main electric drives signals. The main characteristics and accuracy indicators of methods for measuring the rock mass in the bucket and industrial serial information and diagnostic systems are presented. The study found that the: an insufficient amount of work on indirect measurement of the rock mass in a bucket for excavators with main AC drives; the development of a standard criterion for determining the error of the channel for measuring the rock mass in an excavator bucket and a method for verifying the measuring channel is relevant; it is advisable to assess the error of measurement systems using experimental studies by the method of simulating work operations with test weights and indicate the confidence interval for which the error of the measurement system is given; Intelligent systems based on Kalman filters and statistical methods for processing the results of measurements of rock mass in a bucket and efforts in working equipment should be considered a promising direction in the development of new methods.

Osipov P. A. The technical solutions overview for rock mass measuring in the electric single-bucket excavators dipper. MIAB. Mining Inf. Anal. Bull. 2021;(11-1):229—238. [In Russ]. DOI: 10.25018/0236_1493_2021_111_0_229.

Osipov P. A., Senior Lecturer, Department of Mine Electrification, е-mail: pavel.osipov@m. ursmu.ru, Ural State Mining University, Yekaterinburg, Russia.

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