A grating blade control device and an accelerator treatment device

Abstract

The invention discloses a grating precise positioning device, comprising: a mark arranged on the grating blade, a mark capturing device, a data processing module, the data processing module is provided with a coordinate system, and the zero point coordinate is set according to the initial position of the grating blade, and then according to The real-time position information data of the mark transmitted by the mark capture device is calibrated by the data processing module to a certain point in the coordinate system. the actual spatial location at the time. Using the identification mark and its position information, and then calibrating it into the corresponding coordinate system, the actual spatial position of the grating blade can be accurately determined, and the same starting point and end point can be specified for at least two repeated operations, and then the By comparing the obtained coordinate information, the operating position error can be obtained, which provides a direct and accurate basis for error correction. When necessary, the error information can also be used. If it exceeds a certain error range, the alarm device will be triggered. , and even terminate the operation of the equipment to improve the security performance of the equipment.

Description

technical field [0001] The invention relates to an accelerator treatment device, in particular to a grating blade control device and an accelerator treatment device. Background technique [0002] With the development of tumor radiology and material science, as an important means of cancer treatment, radiotherapy has gradually entered the era of "three precisions" of precise positioning, precise planning and precise treatment. In the manufacture and use of traditional grating blades, there is a lack of means for accurate positioning and verification. Errors exist when the same position command is run multiple times. In addition to systematic random errors, there are also mechanical errors generated during manufacturing and operation. , the amount of random error is very small and difficult to adjust, which can be controlled by the sensor closed-loop system, while the mechanical error requires precise adjustment during manufacturing and use, and the lack of existing technology...

AI Technical Summary

Problems solved by technology

[0004] At present, the real-time feedback of the blade position of most grating products is only transmitted to the DSP controller for processing through a single incremental encoder located at the tail of the drive motor through pulse counting. This method can provide accurate position information in most cases , but if the system is disturbed and the counting error occurs in the pulse counting system, the position information obtained by the DSP controller is wrong. Using the wrong position information to control the position of the grating blades will cause errors in the entire grating field, and eventually lead to failure To achieve the expected radiotherapy results, affecting the quality of the entire TPS system

At the same time, if there is an excessive position error, there may even be a collision between the blades on both sides of the grating blade when it is moving, and the driving screw will be broken if it is serious.

[0005] Since the above-mentioned blade position error occurs at the bottom layer of the grating, it cannot be completely protected by the control system at the top layer of the grating

Images