Grey Dynamic Filtering in the Non-Diffracting Beam Triangulation Measurement

To solve the problem of speckle noise, CCD photoelectric noise and background light noise in non-diffracting beam triangulation and improve measurement accuracy and resolution, we use gray dynamic filtering theory. In the non-diffraction beam triangulation measurement system, the measured signal is reconstructed at the maximum peak of the spots by implementing the dynamic GM genetic filtering methods based on the grey system theory. There are only four main steps of modeling. The first step is to update the system dynamically and continuously. The second step is to effectively obtain low frequency trend component,The third step is solving the problem of the low rate of complex multi-measurement.The last is solve the problem of the limit of unsuitable online measurement. This method of triangulation measurement based on the non-diffracting beam have higher measurement accuracy and higher resolution over the traditional laser triangulation measurement system.