2results about How to "Non-destructive testing" patented technology

The present application relates to the technical field of signal processing and fault diagnosis, the method comprises, collecting flame chemiluminescence signal, and carrying out adaptive filtering noise reduction processing;Using improved intrinsic orthogonal decomposition method and high order mode, obtaining comprehensive combustion characteristic information;Developing real-time synchronous compression transform algorithm to carry out time-frequency analysis to data, and updating energy distribution in real time;Combining sensor data, carrying out multi-parameter joint analysis, obtaining combustion state evaluation, using multiple high-speed cameras to obtain flame image from different angles, reconstructing three-dimensional flame morphology through computer vision technology, providing fault detection information;Building fault prediction model, realizing early warning of combustion fault.The method realizes nondestructive and rapid detection of oscillating combustion fault, retains rich information of flame image, reflects overall pulsation characteristics of flame, improves detection speed and accuracy, and makes up for the shortcoming of low frequency resolution of traditional time-frequency analysis method.

This invention provides a method for detecting and calculating the austenite content in steel based on a permeability meter, relating to the fields of steel and electromagnetics. Based on the theoretical differences in saturation magnetization of different phases in ferromagnetic materials, this invention establishes a theoretical calculation model and detection method for measuring austenite content using a permeability meter. A standard-prepared sample is placed in a magnetic pole shoe, and the magnetic field strength H corresponding to the maximum permeability of the ferromagnetic material is first measured. μ Then at ≥1.5H μ Under a magnetic field strength of J, the polarization intensity of the magnetic field strength at multiple points was measured at continuous intervals. m Then, based on the saturation magnetization approximation law and derivation law, the saturation magnetization Js is fitted and solved. Finally, the austenite content is determined according to the theoretical calculation model of austenite content. The method described in this invention solves the influence of the constantly changing effective magnetic path length of traditional magnetometers on the measurement results. The method for determining austenite content is simple, has a solid theoretical basis, high measurement accuracy, and strong data repeatability.