Static balancing method of a CT rotor

Abstract

The invention discloses a static balancing method of a CT rotor. The method comprises the following steps of (1) controlling the CT rotor to rotate at the constant low speed of 4-6rpm in a driver speed mode, (2) collecting a motor current feedback signal and a rotor angle position feedback signal after the speed is stabilized, (3) identifying a wave peak value Imax, a wave trough value Imin, and arotor angle value alpha corresponding to the wave peak value in a current waveform; (4) calculating torque amplitude T=Kt*[0.5*(Imax+Imin)-Imax], wherein Kt is a motor constant; and (5) calculating the amount of unbalance m=T / (g*r), wherein r is balance weight semi-diameter, and the theta is equal to alpha+90 degrees as the balance weight angle. Through the static balancing method of the CT rotordisclosed by the invention, the amount of the unbalance and the position can be automatically identified, an additional extra instrument is unnecessary, the operation is simple, and the efficiency ishigh; and the method is free from the influence of a human factor, the amount of unbalance factor interface can be eliminated, and the precision is high.

Description

technical field [0001] The invention relates to the technical field of tomographic scanning medical devices, and more particularly relates to a static balancing method for a CT rotor. Background technique [0002] In the prior art, the static unbalance of the CT rotor is measured by a push-pull dynamometer to measure the difference in thrust at different angles, and the size and position of the unbalance are identified for trimming. But there are the following problems: When measured by the push-pull force meter, due to the difference in static friction and dynamic friction, the difference in pushing speed, the difference in uniformity, and the difference in individual angle defects, the thrust values ​​of different people and different orders are quite different, which is not accurate enough; additional The thrust gauge has to be manually operated, which is cumbersome and inefficient. The thrust difference at each angle of a circle cannot be identified, and the calculation...

AI Technical Summary

Problems solved by technology

But there are the following problems: When measured by the push-pull force meter, due to the difference in static friction and dynamic friction, the difference in pushing speed, the difference in uniformity, and the difference in individual angle defects, the thrust values ​​of different people and different orders are quite different, which is not accurate enough; additional Thrust gauges need to be operated manually, which is cumbersome and inefficient

The thrust difference at each angle of a circle cannot be identified, the calculation accuracy is poor, and the thrust change caused by non-unbalance factors cannot be ruled out

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