Pumping well fault diagnosis expert system based on generation type rule

Abstract

The invention relates to a pumping well fault diagnosis expert system based on a generation type rule. The pumping well fault diagnosis expert system comprises a man-machine interface, a comprehensivedatabase and a generation type rule library, wherein the man-machine interface is used for the information interaction between a user and all modules of a fault diagnosis system, the user inputs fault information through the man-machine interface, all diagnosis results are displayed on the man-machine interface, the comprehensive database is connected with an inference machine and an explanationmachine and used for storing expression information in the fault diagnosis process and has an initial state, a middle conclusion and a final conclusion, and the generation type rule library is connected with the inference machine and the explanation machine and has a diagnosis rule and a solution in the field of problems to be solved. The pumping well fault diagnosis expert system is suitable fordiagnosis of critical working conditions; compared with other existing popular methods, the expert concept is more expressed, the pumping well fault diagnosis expert system can be better oriented to operation layer users with no professional knowledge background at all, the system is a non-black-box model in the fault diagnosis process and is more clear and easier to understand, and some unnecessary production problems caused when the user does not understand the mechanical operation cannot happen.

Description

technical field [0001] The invention relates to a fault diagnosis technology for pumping wells, in particular to an expert system for fault diagnosis of pumping wells based on production rules. Background technique [0002] The dynamometer diagram of the rod pumping unit well is a concentrated expression of the working condition of the rod pumping system, and the diagnostic dynamometer diagram is the most effective and quick way to judge the working condition of the rod pumping system. The dynamometer diagram of the oil pump can accurately show the actual working conditions of the downhole oil production equipment under different working conditions, and its different shape features represent different working conditions. Analyzing and interpreting dynamometer diagrams is a primary means of directly exploring the operating conditions of the pumping system, a process also known as fault diagnosis. Traditional methods include manual diagnosis method, grid method, vector method...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies such as the rule conflicts caused by the widely used forward reasoning in the prior art, which lead to repeated execution of the reasoning process and the inability to obtain accurate results, the technical problem to be solved by the present invention is to provide an improved ID3 decision tree combined with rough sets Algorithm, further improving the efficiency of pumping well fault diagnosis expert system based on production rules

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