| 摘要 |
A method and apparatus for the measuring of the imbalance and the calculation of the location and size of the necessary weights to be added to a rotating object to balance it. Included are a mounting surface for receiving the object and a shaft affixed to and extending away therefrom with the shaft supported at two spaced apart points therealong, and a pair of pressure sensors with one each at the two support points of the shaft for providing a signal that is proportional to the force exerted by the shaft at the corresponding one of the support points as the object is rotated. In addition, a position and speed of rotation detection means is affixed to the shaft to continuously provide speed of rotation and position data of the shaft. Also there is a pair of tracking filters, each disposed to receive the output signal from a different one of the pair of pressure sensors with the center frequency of both filters being substantially the speed of rotation of the shaft. The tracking filters are provided to filter the signals from the pressure sensors to obtain a signal having frequency components that are within the vicinity of the frequency of the speed of rotation of the shaft. Finally, there is computational means coupled to receive the position and speed of rotation signals and the signals from the pair of tracking filters to compute the imbalance of the rotating object and the location and the weight to be added to bring it into balance.
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