Inspection and Image Analysis of Nickel Sulphide Inclusions in Toughened Glass Panels
Nickel sulphide is a kind of detrimental inclusion in toughened glass panels. Once the critical conditions are satisfied, the inclusion will cause the shattering of glass panels. An inspection tool was developed for rapid detection of inclusions. More than one thousand pieces of glass were inspected and seventeen of them were found with inclusions. With the experiment of heat soak, and analysis of dispersive energy spectrum, the appearance of nickel sulfide inclusion was presented, which can be used as guidance of in-line inspection of glass panels. The optical system was improved to get clear image of inclusions inside glass panels. Auto focus technique was used to measure the depth of inclusions, which can provide a parameter for the categorization of inclusions
Micro Raman characterization of nickel sulfide inclusions in toughened glass
Toughened glass panels used as glazing material in multistory buildings are subject to fracture when they contain nickel sulfide inclusions. The failure mechanism is generally attributed to the significant volume increase related to a polymorphic phase retransformation in nickel sulfide. This investigation exploits the ability of micro Raman spectroscopy to analyze minute inclusions. The technique is able to distinguish between different polymorphs and various stoichiometric forms of nickel sulfide and has the potential to satisfy the need for an in situ, nondestructive analytical technique for the characterization of nickel sulfide inclusions in glass.
Application of Automatic Tracking Correlation Filtering in Motored Spindle Dynamic Balancing
According to the information characteristics of the dynamic imbalance signal and the definition of correlation function,the principles and algorithm of relevant filter with automatic tracking is given.In labview development system,based on the principles of relevant filter with automatic tracking,the graphics programming of extracting the dynamic imbalance signal is developed.With this programming,the vibration signal including different frequency harmonic signals and noise is processed by simulation and on-site experiment.The results show that: through relevant filter with automatic tracking,the dynamic imbalance signal under different rotating speed can be extracted accurately,and it can meet the requirement of motored spindle dynamic balancing measurement.