X-ray Tomograph Planar Detector 3D Geometry
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Solution Overview
Problem
Existing X-ray computer tomography methods for industrial component examination are time-consuming and unsuitable for geometric measurement due to the need for layer-by-layer detection, which is not efficient for capturing three-dimensional volume data.
Innovation Solution
An X-ray computer tomograph with a radiation source and planar detector that allows movement in at least two degrees of freedom, enabling a three-dimensional radiation geometry and reconstruction of precise three-dimensional X-ray images without layer-by-layer detection, using a multi-line detector with a high ratio of detector height to width for rapid volume data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If layer-by-layer detection is used with fan beam geometry, then precise reconstruction of two-dimensional layers is achieved, but time expenditure increases significantly making it unsuitable for industrial geometric measurement
Solution Approach 1:
The patent transitions from two-dimensional fan beam detection to three-dimensional cone beam detection by adding a detection dimension. The planar detector array captures X-ray attenuation data from multiple angles simultaneously, enabling volumetric reconstruction of the entire component in a single measurement cycle rather than sequential layer-by-layer scanning.
Solution Approach 2:
The patent combines multiple two-dimensional detector lines into a single planar detector array that captures data from the entire volume of interest simultaneously. By merging the detection capabilities of multiple lines into one integrated planar detector, the system acquires three-dimensional information in a single measurement rather than requiring multiple sequential scans.
2Device complexity
If multi-line detectors with small line number to column number ratio are used, then device complexity is reduced, but the ability to capture three-dimensional volume data efficiently is limited
Solution Approach 1:
The patent increases the detector height dimension to create a planar detector array with sufficient height-to-width ratio. This dimensional enhancement allows the detector to capture a larger solid angle of X-ray attenuation data, enabling efficient three-dimensional volume reconstruction without requiring an excessive number of detector elements in the plane.
Solution Approach 2:
The patent changes the geometric parameter of the detector by ensuring the height-to-width ratio is at least 1/8. This parameter adjustment optimizes the detector's ability to capture three-dimensional information while maintaining a manageable number of detector elements, balancing productivity gains with acceptable device 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
Enables rapid and precise geometric measurement of components, including concealed structures, with high-resolution dimensional data determination, reducing image quality impairments and allowing for precise adherence to manufacturing tolerances.
Implementation Method 1
a radiation source for producing X-radiation with a three-dimensional radiation geometry
Implementation Method 2
a planar detector for detecting the X-radiation
Implementation Method 3
a reconstruction unit for reconstructing a three-dimensional X-ray image of the component from the X-radiation detected along the at least one trajectory
Data Source
AI summary
In an X-ray computer tomograph and a method for examining a component by means of X-ray computer tomography, the component carries out a movement relative to a radiation source detector unit in at least two degrees of freedom of movement, so at least one trajectory can be produced which spans a three-dimensional space. Since the X-radiation has a three-dimensional radiation geometry, volume data can be rapidly obtained and precisely reconstructed to form a three-dimensional X-ray image. The component can be geometrically measured by means of a geometry detection unit.