CT Inspection System Non-Uniform Rotation Position Feedback
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Solution Overview
Problem
The existing CT inspection systems that rotate at non-uniform speeds during scanning result in deformed CT images, leading to poor accuracy of detection results due to the inability to effectively determine the rotational position of the detection device when the radiation source emits a beam.
Innovation Solution
A CT inspection system that includes a radioactive source device, a detection device synchronously rotating at a non-uniform speed, a frequency multiplying device to increase the beam emitting frequency, a rotation monitoring device to detect and transmit angle signals, and an imaging device that processes the data to accurately determine the rotational position of the detection device, thereby generating a corrected CT image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the radiation source and detection device rotate at non-uniform speed during scanning, then the scanning process can be continuous and efficient, but the reconstructed CT image becomes deformed and detection accuracy decreases
Solution Approach 1:
The system employs a rotation monitoring device that continuously detects the actual rotational position of the detection device and provides feedback signals. This feedback mechanism enables the system to track and compensate for non-uniform rotation effects, allowing accurate image reconstruction even during continuous non-uniform scanning operations.
Solution Approach 2:
The patent replaces mechanical uniform rotation control with an electronic/digital solution. Instead of mechanically enforcing uniform rotation speed, the system uses a frequency multiplying device and digital signal processing to generate correction based on actual rotation monitoring, substituting mechanical precision requirements with electronic compensation.
2Force
If the radiation source and detection device rotate at non-uniform speed, then acceleration can be reduced during scanning, but the rotational position cannot be accurately determined leading to image deformation
Solution Approach 1:
The rotation monitoring device provides continuous feedback on the actual rotational position, enabling the system to determine precise angular positions even during non-uniform rotation with acceleration. This feedback allows the imaging device to correctly associate detected signals with their corresponding rotational positions.
Solution Approach 2:
The patent introduces an intermediary frequency multiplying device that processes the rotation monitoring signals. This intermediary component transforms the rotation position information into a format that can be accurately correlated with the detected X-ray data, enabling precise positional determination without requiring uniform rotation.
3Measurement precision
If a frequency multiplying device is added to the system, then the rotational position can be accurately determined, but the device complexity increases
Solution Approach 1:
The frequency multiplying device serves multiple functions: it processes rotation monitoring signals, generates correction factors for non-uniform rotation, and provides timing synchronization for data acquisition. By consolidating these functions into a single device, the patent minimizes the increase in overall system complexity while achieving accurate rotational position determination.
Solution Approach 2:
The rotation monitoring device and frequency multiplying device work together in a self-sufficient manner to automatically compensate for non-uniform rotation effects. The system self-corrects for position determination errors without requiring external intervention or complex additional control mechanisms, reducing overall system complexity.
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 image deformation and improves the accuracy of detection results by accurately determining the rotational position of the detection device, ensuring precise image reconstruction even during non-uniform rotational scanning.
Implementation Method 1
a radiation source which is configured to generate high-energy X rays
Implementation Method 2
a detection device which is configured to receive X rays penetrating through the object to be detected
Data Source
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Figure 2
AI summary
The present disclosure relates to the technical field of CT detection, and in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure comprises a radioactive source device, a detection device, a rotation monitoring device and an imaging device, wherein the detection device obtains detection data at a frequency that is N times a beam emitting frequency of the radioactive source device; the rotation monitoring device detects a rotation angle of the detection device and transmits a signal to the imaging device each time the detection device rotates by a preset angle; the imaging device determines a rotational position of the detection device each time the radioactive source device emits a beam according to the signal transmitted by the rotation monitoring device and the detection data of the detection device, and generates a CT image based on the detection data and the rotational position of the detection device each time the radioactive source device emits a beam. The present disclosure can accurately determine the rotational position of the detection device each time the radioactive source device emits a beam, so that it is possible to effectively reduce the image deformation and improve the accuracy of detection results.