Linear Accelerator Gantry Collision Avoidance Control
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Solution Overview
Problem
Linear accelerators face safety challenges due to potential collisions between moving components, such as the gantry and turntable, which can cause equipment damage and patient injury, necessitating effective collision avoidance mechanisms.
Innovation Solution
A control method that involves detecting preset positions of moving components and adjusting their movements to prevent collisions, using a combination of motors, graduated scales, and detection modules like encoders and limit switches to pause or redirect components when they approach collision paths, ensuring safe operation by avoiding overlaps in their motion paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gantry rotates continuously around the treatment bed, then the treatment efficiency is improved, but the risk of collision with the turntable increases
Solution Approach 1:
The control system performs preliminary detection of the turntable's position using detection modules (encoders, limit switches) before the gantry completes its rotation. When the turntable is detected to be in a position that may cause collision, the system proactively adjusts the gantry's motion path or pauses its rotation, preventing the collision before it occurs.
Solution Approach 2:
The system employs detection modules including encoders and limit switches to continuously monitor the positions of both the gantry and turntable. This feedback information is fed to the control system, which processes the data and dynamically adjusts the gantry's rotation speed or path in real-time to avoid collision with the turntable, thereby maintaining both efficiency and safety.
2Adaptability or versatility
If the turntable rotates to adjust the treatment bed position, then the treatment flexibility is improved, but the potential for collision with the gantry increases
Solution Approach 1:
The control system performs preliminary detection of the gantry's position using detection modules (encoders, limit switches) before the turntable completes its rotation. When the gantry is detected to be in a position that may cause collision, the system proactively adjusts the turntable's motion path or pauses its rotation, preventing the collision before it occurs.
Solution Approach 2:
The system employs detection modules including encoders and limit switches to continuously monitor the positions of both the gantry and turntable. This feedback information is fed to the control system, which processes the data and dynamically adjusts the turntable's rotation speed or path in real-time to avoid collision with the gantry, thereby maintaining both flexibility and safety.
3Reliability
If detection modules are added to monitor component positions, then collision detection capability is improved, but the device complexity increases
Solution Approach 1:
The detection modules (encoders and limit switches) are designed to serve multiple functions: they not only detect the positions of the gantry and turntable for collision avoidance but also provide feedback for precise positioning and treatment alignment. This multi-functionality reduces the need for separate detection systems, thereby limiting the increase in device complexity.
Data Source
AI summary
A method and device for controlling a linear accelerator as well as a linear accelerating system are provided according to examples of the present disclosure. In an example, a first component of the linear accelerator is controlled to move according to a motion instruction; when it is detected that the first component reaches a first position, the first component is controlled to pause moving, and a second component of the linear accelerator is controlled to move in a preset direction; when it is detected that the second component reaches a second position, the second component is controlled to stop moving, and the first component is controlled to continue to move according to the motion instruction.