초록 ▼

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

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.

대표청구항 ▼

A balancer for measuring inbalance in a vehicle wheel at any desired rotational speed, comprising: (a) a shaft to which the wheel may be connected so that the wheel is substantially axially aligned with the shaft; (b) a frame for supporting the shaft so that the shaft is free to rotate; (c) two tran

A balancer for measuring inbalance in a vehicle wheel at any desired rotational speed, comprising: (a) a shaft to which the wheel may be connected so that the wheel is substantially axially aligned with the shaft; (b) a frame for supporting the shaft so that the shaft is free to rotate; (c) two transducer means for sensing forces imposed by the shaft and for providing signals that correspond to such forces as the wheel rotates, both of which transducer means are located on the same side of the wheel; (d) position and speed indicating means for sensing and providing signals that correspond to the angular position and speed of the wheel; (e) two tracking filter means, each for receiving the signals from a transducer means and speed signals from the position and speed indicating means, the center frequency of which tracking filter means may be adjusted to correspond to the speed signals; (f) parameter adjustment means for adjusting the gains of the signals from the transducer means in order to compensate for the width of the wheel and the distance of the wheel from the transducers; (g) normalizing means for adjusting the gains of the signals from the transducer means in order to compensate for the difference of their distances from the wheel; and (h) computing means for receiving signals from the transducer means via the tracking means and from the position and speed indicating means, for computing the imbalance of the wheel, and for indicating the size of weight which must be attached and the position at which it must be attached, in order to balance the wheel.