An Elevator Safety Level Evaluation Method Based on Multi-level Index System

Abstract

The invention discloses an elevator safety grade evaluation method based on a multistage index system. The method comprises the steps of 1, performing grade division on an elevator safety evaluation risk grade and evaluation index grades; 2, performing relative membership processing on elevator safety evaluation indexes correspondingly according to safety grades; 3, building a matter-element modelof an elevator system, and calculating the correlation of to-be-evaluated and recorded indexes with respect to the safety grades; and 4, determining the safety grades of the indexes according to a maximum correlation criterion, performing multi-stage comprehensive evaluation of the safety grades according to a hierarchical structure of the index system, and meanwhile calculating the health degreeof the elevator system. According to the method, the layering of the elevator safety evaluation index system is realized, and index weights are fused, so that the problems of unreasonable division ofthe index system and one-sided index weight assignment are solved. For the diversity, fuzziness and complexity in elevator safety evaluation, an extendable fuzzy comprehensive evaluation model for evaluating the safety grade of an elevator is built, and the evaluation of the safety grade and the health degree of the elevator is realized.

Description

technical field [0001] The invention belongs to the technical field of elevator equipment. Background technique [0002] At present, most of the elevator safety index information comes from the manual statistics of safety checklists, the overview of safety standards and the analysis of safety evaluation models. Due to the large number of index factors, it is difficult to satisfy the scientificity, completeness, simplicity and feasibility of the establishment of the index system at the same time when establishing the safety evaluation index system. At the same time, the weighting of the index system is mostly one of the subjective weighting method and the objective weighting method, which is one-sided. In the elevator safety evaluation, the existing research methods are mainly divided into three categories: qualitative evaluation methods, probability evaluation methods and quantitative evaluation methods. Qualitative evaluation methods have disadvantages such as low evaluat...

AI Technical Summary

Problems solved by technology

Qualitative evaluation methods have disadvantages such as low evaluation accuracy and high subjective arbitrariness; probabilistic evaluation methods are restricted by conditions such as uncertainty and factor interaction when evaluating complex systems; quantitative evaluation methods have relatively low requirements for the integrity of data. High, difficult to implement for complex systems

Moreover, the above three methods have less consideration for the fuzziness of the electrical system, and the division of the index system is unreasonable, and the assignment of index weights is one-sided.

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