Method for calculating curvature of light bar bow based on data of rotary measuring bar

The invention discloses an optical wand bow curvature calculation method based on rotary measuring wand data. The method comprises the following steps: displaying multi-position bow curvature based on multiple lines; data of the same horizontal line are collected and visualized, and the fluctuation condition of the line can reflect the bow curvature of the light bar on the horizontal line; performing data noise reduction based on empirical wavelet decomposition; an appropriate wavelet filter is constructed to extract different amplitude modulation-frequency modulation components, Hilbert transformation is carried out on an AM-FM mode obtained through decomposition, and instantaneous frequency and amplitude are obtained; positioning the bow curvature calculated based on the range index; performing interval division according to the center position data of the optical fiber preform, and calculating the range of data in each interval; a mean value-range control chart is used for displaying the change condition o