Synchronous control system and method for multiple motors in CT machine

Abstract

The invention relates to a synchronous control system for multiple motors in a CT machine. The synchronous control system comprises at least two direct current motors arranged on the two sides of a scanning bed, a main control computer used for sending PWM modulation codes and a synchronous processing unit used for conducting synchronous control. The invention further relates to a synchronous control method for the multiple motors in the CT machine. According to the method, at least two direct current motors are utilized to push the scanning bed to lift and conduct synchronous control, and inconformity of the stretching-out length of two pushing rods generated due to mechanical installation and inconformity of motion characteristics of all the motors can be compensated; at least two direct current motors are utilized to push a rack to conduct inclined motion and conduct synchronous control at the same time, and inconformity of the stretching-out length of the two pushing rods generated due to mechanical installation and inconformity of motion characteristics of all the motors can be compensated. According to the synchronous control system and method, synchronous motion of the scanning bed in the CT machine and the double motors of the rack is controlled, the scanning bed and the rack can conduct accurate off-position in the motion process, and thus the service life of products is prolonged.

Description

technical field [0001] The invention relates to the technical field of multi-motor synchronous control, in particular to a multi-motor synchronous control system and method applied in a CT machine. Background technique [0002] In high-precision, high-safety, heavy-duty systems such as medical care and CNC machine tools, multi-motor motion synchronization control is a very important core issue. The synchronization of multi-motor motion directly affects the reliability and service life of CT machines. [0003] With the development of numerical control technology, it is more frequent to use multiple motors in one system to drive heavy load systems for movement. For example, for the scanning bed in the CT machine, the scanning bed of the traditional CT machine uses a motor and a booster spring to start the up and down movement of the scanning bed. This traditional method of using a single motor and a booster spring has technical requirements and The production process is very ...

AI Technical Summary

Problems solved by technology

However, if the synchronous motion control of the two motors on both sides of the frame is not done well, it will seriously affect the working performance and service life of the CT machine

In addition, it will also affect the accuracy of the stop position of the scanning table during the movement process, thereby affecting the quality of CT image imaging, and thus affecting the diagnostic results

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