Assembling quality online detection method, device and system

Abstract

The invention provides an assembling quality online detection method, device and system. The method is characterized by collecting vibration signals during an assembling period, dividing the vibrationsignals in the assembling period into several segments and taking as the vibration signal of each assembling process in the assembling period; calculating the autocorrelation function of the vibration signal of each assembling process through using an autocorrelation or cross-correlation method, and constructing the error tolerance range of each assembling process; collecting the vibration signalof each assembling process after set assembling time, calculating the autocorrelation or cross-correlation function of the vibration signal, and recording a time interval corresponding to the peak value and the peak point of the autocorrelation or cross-correlation function; determining whether the time interval corresponding to the peak value and the peak point of the autocorrelation or cross-correlation function of each assembling process satisfies the corresponding error tolerance range; and if the time interval satisfies the corresponding error tolerance range, determining that assemblingoperation quality accords with a requirement, otherwise, determining that the assembling operation quality does not accord with the requirement. By using a correlation technology, the on-line detection of assembling quality is performed and component error and leak rates can be greatly reduced.

Description

technical field [0001] The disclosure relates to the field of product assembly quality inspection, and in particular to an assembly quality online inspection method, device and system using correlation technology. Background technique [0002] Inspection is an important guarantee for product assembly quality. Analysis based on inspection results can feed back and guide the assembly process. Effective quality inspection can greatly improve the qualified rate of assembled products. Some assembly processes even use assembly quality inspection as a link in assembly, directly Participate in the assembly process. [0003] Some existing small-scale manufacturers mainly use manual detection, which still has the disadvantages of low detection efficiency and inaccuracy. For large-scale manufacturers, there are few assembly quality online inspection systems, but they have been gradually paid attention to, mainly based on the characteristics of parts to set rigid standards for inspecti...

AI Technical Summary

Problems solved by technology

[0003] Some existing small manufacturers mainly use manual detection, which still has the disadvantages of low detection efficiency and inaccuracy

For large-scale manufacturers, there are few assembly quality online inspection systems, but they have been gradually paid attention to, mainly based on the characteristics of parts to set rigid standards for inspection, and not based on the correlation of vibration signals.