Multi-Cathode X-Ray Source for CT Stability and Speed
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Solution Overview
Problem
Current CT devices face reliability and stability issues due to high-speed movement of the X-ray source on a slip ring, which limits inspection speed and causes anode target overheating, and existing solutions are either complex or costly with poor image quality.
Innovation Solution
A cathode control multi-cathode distributed X-ray apparatus with independent cathodes arranged in a linear or arc array, focal current limiters, and a large anode, allowing for multiple angles of view without moving the X-ray source, simplifying the structure and improving stability and inspection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the X-ray source moves on the slip ring to acquire multiple angles of view, then the CT inspection speed can be improved, but the reliability and stability of the device are reduced
Solution Approach 1:
The invention divides a single cathode into multiple independent cathodes arranged in an array. Each cathode can be independently controlled to emit electron beams at different angles. This segmentation allows the X-ray source to provide multiple viewing angles simultaneously without mechanical movement, thereby improving both inspection speed and device reliability.
2Productivity
If the X-ray source moves on the slip ring to acquire multiple angles of view, then the CT inspection speed can be improved, but the anode target overheating problem worsens
Solution Approach 1:
By segmenting the cathode into multiple independent cathodes, the electron beam current can be distributed across multiple cathodes. This reduces the current load and heat generation on the anode target for each individual cathode, mitigating the overheating problem while maintaining high inspection speed through parallel operation capability.
Solution Approach 2:
The multiple cathodes can operate in a periodic sequence, with each cathode emitting electron beams at different time intervals. This periodic action distributes the thermal load on the anode target over time, preventing excessive heat accumulation while maintaining continuous X-ray production for high-speed CT inspection.
3Productivity
If multiple rows of detectors are mounted to increase CT inspection speed, then the productivity is improved, but the device complexity increases
Solution Approach 1:
Instead of adding more detectors to increase inspection speed, the invention inverts the approach by adding multiple cathodes to the X-ray source. This allows multiple viewing angles to be achieved from the source side rather than the detection side, simplifying the overall device structure while maintaining high productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables multiple angles of view without moving the X-ray source, enhancing system stability, reliability, and inspection efficiency while reducing anode overheating and improving image quality.
Implementation Method 1
current passes through and is heated up to the working temperature of about 2000K
Implementation Method 2
generating a thermally emitted electron beam stream
Implementation Method 3
a high voltage of hundreds of thousands of volts is applied between the anode and the cathode. The electrons generated by the cathode accelerate and fly to the anode under the action of the electric field
Implementation Method 4
hit the target surface, thereby producing X-ray
Data Source
AI summary
This invention relates to an apparatus producing distributed X-ray, and in particular to a cathode control multi-cathode distributed X-ray apparatus, which produces X-ray that changes focal position in a predetermined order by arranging multiple independent hot cathodes and controlling cathodes in an X-ray source device, and a CT device having said X-ray apparatus.