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Both rule-based reasoning (RBR) and case-based reasoning (CBR) methods are applicable to the field of belt conveyor fault diagnosis. Aiming at the problem that both of them focus on cause analysis or maintenance means in fault diagnosis, the reasoning mechanism based on RBR+CBR dual reasoning was studied, and an expert system was established to diagnose the fault of belt conveyor drive system. Firstly, the expert system for fault diagnosis was constructed on the basis of the structure of traditional expert system. Then, the fault tree of the belt conveyor drive system was established according to the fault mechanism, the expert system fault rule base was designed by using the generative representation method, and according to the fault cases and expert experience, the expert system fault case base was designed by using the matrix representation method. The expert system reasoning mechanism was designed based on the rule-based reasoning (RBR) and case-based reasoning (CBR) methods. And the human-computer interaction interface of the expert system was designed by using the LabVIEW program development platform, which realized the series communication process between the sensor, knowledge base and client. Finally, in order to verify the feasibility of the above expert system, experiments were conducted on a belt conveyor operating site in a certain mine, and the results were analyzed. The results of the study show that, the fault cause analysis accuracy of the belt conveyor expert system exceeds 95%, and the effectiveness of the fault repair plan of the expert system exceeds 94%. In comparison with the expert system supported by RBR and CBR algorithms, this expert system has better convergence, effectiveness and accuracy, and it proposes an effective method for the intelligent fault diagnosis of the belt conveyor. [ABSTRACT FROM AUTHOR]

Aiming at the problems of unwinding or overloading of the winding motor caused by the unstable winding tens ion of the belt conveyor during the belt change process, the constant tension control of the belt winding machine was studied, a mathematical model of winding tension control was proposed, and a center winding type winding machine and a control strategy to achieve constant tension winding through PI frequency conversion speed control were designed through this model. The tape coiler model was simplified, Recurdyn-R2R2D was used to build a simplified dynamic simulation model of the tape coiler, and a constant tension control strategy was built in Colink aceording to the tension control model. Finally. the effect of constant tension winding was analyzed through Co-simulation of Recurdyn and Colink. The results indicate that the PI variable frequency speed regulation designed by the tension control model to realize the control strategy of constant tension winding can stabilize the unit tension at 5 N/mm² during the winding process, and the maximum overshoot does not exceed 8%. It also can sense the sudden increase signal of winding tension to quickly control the stop of the winding machine to prevent the motor from overloading, which provides a reference for the design and field application of the conveyor belt winder. [ABSTRACT FROM AUTHOR]

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