Multi-rope friction lifter load identification method based on vibration analysis

Abstract

Disclosed is a multi-rope friction lifter load identification method based on vibration analysis. According to the method, an acceleration sensor is arranged on a main shaft of a lifter to collect a vibration signal, and the signal is captured to serve as a time-domain signal to be processed; the signal to be analyzed is decomposed into a limited number of intrinsic mode functions by means of the empirical mode decomposing method, false and margin components are eliminated, and an effective IMF set is extracted; energy feature information of the signal is extracted by means of an effective IMF component, the energy, energy variance contribution rate and energy moment of the IMF component are selected to serve as feature values to construct a feature vector and a high-dimensional sample space thereof, the nonlinear mapping relation between a sample and a target is built by means of the vector regression algorithm with total lifting weight and load difference as the estimation target, and then the load value is calculated. The multi-rope friction lifter load identification method based on the vibration analysis is high in stability and estimation accuracy, used for obtaining the real-time lifting load of the lifter to further monitor the lifting load in real time, and capable of avoiding lifting failures caused by overloading, rope clamping, rope loosening and the like.

Description

technical field [0001] The invention relates to a method for detecting the load of a multi-rope friction hoist, in particular to a method for identifying the hoisting load of a multi-rope friction hoist based on vibration analysis. Background technique [0002] As a common equipment in coal mine production, the multi-rope friction hoist is a key equipment related to production and personnel safety. Once a failure occurs, it will cause major economic losses and even casualties. In all kinds of safety accidents, safety accidents such as overwinding, sliding or even falling tanks caused by overload, as well as safety accidents such as rope jamming, loose ropes or even broken ropes caused by tank road deterioration, etc. occur from time to time, and these failures can be directly or Indirectly reflected by the lifting load. [0003] Among the existing technologies that can be obtained, the methods of lifting load control and detection mainly include: one is to directly measure ...

AI Technical Summary

Problems solved by technology

Its shortcoming is that it cannot reflect the change of dynamic load during the lifting process, and cannot diagnose and alarm faults such as rope jamming and slack rope

The above methods either have high requirements for installation accuracy and reliability, or have an impact on the lifting system, or have low accuracy, which cannot meet the needs of actual engineering

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