Control driving method for medical accelerator frame

Abstract

The invention discloses a control driving method for a medical accelerator frame, which comprises the steps that S1, V / F output is carried out, wherein frame angle information is sampled in real time, the sampled frame angle information is sent to a V / F output unit and a judgment unit after being parsed, and the V / F output unit converts the frame angle information into a frequency value and then outputs the frequency value to a main control computer in real time; S2, the main control computer judges whether a frame zero position calibration unit completes a frame zero position calibration operation or not, a step S4 is executed when the frame zero position calibration operation is completed, and a step S3 is executed if the frame zero position calibration operation is not completed; S3, the step S4 is executed after the frame zero position calibration operation is performed; and S4, the main control computer sends a rotation command to a host command response unit, the host command response unit responds to the rotation command and sends the rotation command to a frequency conversion unit, and the frequency conversion unit carries out three-stage speed variation control on the frame according to the rotation command. According to the invention, control driving for the medical accelerator frame is realized by adopting a control driving system of the medical accelerator frame, and the control driving method has the advantages of good reliability, high control precision in frame rotation and the like.

Description

technical field [0001] The invention belongs to the technical field of electron linear accelerators used in medical treatment and industrial irradiation, and in particular relates to a method for controlling and driving a frame of a medical accelerator. 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 ...

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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