Control driving system for universal rack

Abstract

The invention discloses a control driving system for a universal rack, which can realize stable and reliable rack rotation control and high control precision. A photoelectric encoder and a potentiometer are arranged on the rack and a motor respectively, two measurement angle values are calibrated through an angle calibration module, and thus, a self-calibration function is realized; in the case of automatic control, when the rack moves near a target angle, different operating frequencies are transmitted to a frequency converter according to the difference between the current angle and the target angle, the relationship between the angle difference and a motion speed can simulate a damped motion curve, the motion speed of the rack just reaches 0 when the rack moves to the target angle, and thus, zero overshoot control is realized, and the rotation precision is high; and through detecting the position of a treatment couch in real time through an automatic anti-collision control unit and an anti-collision and anti-over turning control module, collision between the rack and the treatment couch is automatically prevented.

Description

technical field [0001] The invention relates to the technical field of electron linear accelerators used in medical treatment and industrial irradiation, in particular to a control and drive system for a general frame. Background technique [0002] In the application of medium and high energy medical electron linear accelerators, the automatic arc treatment function is one of the important and characteristic functions of the system. [0003] In order to ensure the realization of the automatic radian treatment function, it is necessary to realize precise control of the rack rotation to ensure that the rack rotation is in place with high accuracy and reach the system index. During the treatment process, the running speed of the rack can be adjusted at any time, and the rotating speed of the rack should be controllable within the specified speed range. Rack rotation requires a brake function, which can stop the movement of the rack in a very short time in an emergency. [000...

AI Technical Summary

Problems solved by technology

[0004] At present, the structure of the control and drive system of the medical accelerator frame is relatively complicated, the positioning accuracy of the frame is poor, it is easily disturbed, the work is unstable, and the protection measures are not perfect under abnormal conditions, so it is impossible to complete the automatic arc treatment task with high quality.

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