The present application belongs to the field of
data acquisition, and relates to a gearbox gear detection equipment detection
data acquisition method and
system. The method comprises the following steps: collecting gearbox vibration and synchronous speed signals, dividing the vibration signals into frames, and performing
noise reduction
processing on each frame; estimating the composite
noise spectrum based on the synchronous speed
signal and
harmonic analysis, combining the time-frequency kurtosis to adaptively select a multi-
window function to calculate the noisy power spectrum, using the transient characteristics and prior
signal-to-
noise ratio to determine the nonlinear subtraction factor, performing
spectral subtraction to obtain the target power spectrum, comparing the deviation of the actual meshing frequency and the theoretical value to dynamically determine whether to reconstruct the
phase spectrum; and reconstructing all processed data frames by overlapping addition to obtain the detection
signal. The present application can comprehensively suppress
harmonic and
random noise, and conditionally reconstruct key phase information, thereby improving the recognition degree and
diagnostic accuracy of early weak fault features of the gearbox.