CNT X-Ray Tube Dummy Load Control for Voltage Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable X-ray generation devices for dental purposes face challenges in reducing size and weight while maintaining insulation stability, leading to voltage variations that can cause dielectric breakdown and image artifacts.
Innovation Solution
A CNT X-ray tube control system with a dummy load having the same structure as the CNT X-ray tube, connected in parallel, to minimize voltage variations during ON/OFF operations, using a controller to manage the high-voltage part and control current through active-current control methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the device size is reduced using CNT X-ray tube, then the portability and weight are improved, but voltage variation occurs during ON/OFF operation causing dielectric breakdown risk
Solution Approach 1:
A dummy load is introduced as an intermediary component connected in parallel with the CNT X-ray tube. This dummy load acts as a mediator that maintains continuous current flow through the high-voltage circuit, preventing sudden voltage spikes during ON/OFF transitions of the actual X-ray tube, thereby protecting against dielectric breakdown while preserving the compact design
Solution Approach 2:
The system dynamically changes the operational state of the dummy load based on the X-ray tube's ON/OFF status. During X-ray tube OFF periods, the dummy load remains active to maintain voltage stability; during X-ray tube ON periods, the dummy load operates in parallel. This parameter switching approach resolves the voltage variation issue without requiring larger insulation distances
2Reliability
If insulation distance is increased to prevent dielectric breakdown, then the reliability is improved, but the device size increases
Solution Approach 1:
Instead of increasing physical insulation distance, the patent introduces a dummy load as an electrical intermediary that actively manages voltage transitions. This approach maintains reliable insulation by controlling electrical parameters rather than relying solely on increased physical spacing, thus avoiding device size enlargement
3Productivity
If the CNT X-ray tube is turned ON and OFF for imaging, then the imaging capability is improved, but voltage variation causes image artifacts
Solution Approach 1:
The dummy load serves as a stabilizing intermediary that smooths voltage transitions during X-ray tube switching. By maintaining continuous current flow through the parallel dummy load, sudden voltage changes that cause image artifacts are prevented, thereby improving image quality while preserving imaging capability
Solution Approach 2:
The dummy load provides beforehand cushioning by being pre-positioned in parallel with the X-ray tube. It is ready to immediately compensate for voltage variations when the X-ray tube switches state, cushioning against voltage spikes before they can affect image quality
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
The system effectively reduces the size and weight of the X-ray generation apparatus while stabilizing voltage, minimizing image artifacts and ensuring safe radiation exposure by maintaining a uniform load resistance.
Implementation Method 1
A CNT X-ray tube including an anode electrode, a gate electrode, and a cathode electrode, and configured to generate X-rays from electric field emission
Implementation Method 2
electrons are emitted by an electric field formed between the gate electrode and the electron emitter. When the electron beams emitted from the electron emitter travels through this mesh structure or the plurality of holes, the electrons are accelerated by an electric field formed between the anode and the cathode so as to strike an X-ray target surface provided on the anode size so that X-rays are emitted
Data Source
AI summary
A CNT X-ray tube control system according to an embodiment of the present disclosure includes a CNT X-ray tube including an anode electrode, a gate electrode, and a cathode electrode, and configured to generate X-rays from electric field emission; a dummy load including an anode electrode, a gate electrode, and a cathode electrode, and configured not to generate X-rays, the dummy load being connected to the CNT X-ray tube in parallel; a high-voltage part configured to control a voltage applied to the CNT X-ray tube; and a controller configured to control the CNT X-ray tube, the dummy load, and the high-voltage part. Particularly, a portable X-ray generation apparatus reduced in size can be provided, the apparatus including the dummy load having the same structure as a CNT to minimize the voltage variation of the high-voltage part during the ON/OFF operation of the CNT.