Valve fault state sensing calculation diagnosis method and system based on terahertz radar

Abstract

The invention discloses a valve fault state sensing calculation diagnosis method and system based on a terahertz radar. The terahertz radar is used for transmitting linear frequency modulation continuous waves to a working valve and the surrounding environment and objects of the valve; echo signals reflected by the valve, the environment around the valve and objects are received through a terahertz radar; the terahertz radar performs frequency mixing on the echo signal and the frequency-modulated continuous wave to obtain an intermediate frequency signal; performing signal processing on the intermediate frequency signal to obtain a phase signal of the intermediate frequency signal; inputting the phase information of the intermediate frequency signal into the trained deep neural network; and outputting the faulted part and the faulted degree by using the deep neural network, and completing the fault diagnosis of the valve core and the valve rod of the electric reversing valve in the valve. According to the method, the defect that a traditional method cannot distinguish fault categories is overcome, and the fault occurrence degree can be effectively and accurately recognized.

Description

technical field [0001] The invention belongs to the technical field of valve fault diagnosis, and in particular relates to a terahertz radar-based sensory calculation diagnosis method and system for a valve fault state. Background technique [0002] The hydraulic system is widely used in various rotating machines, and the working environment of the control components in it is complicated, and various types of failures are prone to occur, which will affect the operation of the power system. In addition to oil pollution, which accounts for about 70% of system failures in the hydraulic system, the main failure parts are pumps and valve components, and the failure of valves is not accidental, but a manifestation of accumulated problems. Taking the electric reversing valve in the valve as an example, the function of the electric reversing valve is realized by the relative movement between the valve core and the valve body, which can realize the communication, cutting and reversin...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a terahertz radar-based sensory calculation and diagnosis method and system for valve fault status in view of the deficiencies in the above-mentioned prior art, so as to solve the problems in the prior art that cannot be automatically detected and the detection environment has strict requirements , the detection efficiency and accuracy are low, and the location of the fault and the degree of the fault cannot be identified.

Images