Multi-Angle Radiation Detector for Surface Property Analysis
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Solution Overview
Problem
Existing methods for determining surface properties, particularly on motor vehicles, fail to accurately identify physical causes of color changes due to variations in layer thickness and pigment orientation, leading to incorrect assessments and inability to take corrective measures.
Innovation Solution
An apparatus with two radiation detector devices offset at predefined angles relative to the reflected radiation, allowing for the differentiation between changes in layer thickness and pigment orientation by analyzing the ratio of measured radiation intensities, enabling the determination of physical causes of color changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single radiation detector device is used to measure surface properties, then the apparatus is simple, but it cannot distinguish between color changes caused by layer thickness variations and those caused by pigment orientation changes
Solution Approach 1:
The single detection function is segmented into multiple radiation detector devices (at least two) positioned at different angles. Each detector captures radiation reflected at its specific angle, allowing the system to distinguish between layer thickness effects (affecting all angles similarly) and pigment orientation effects (affecting different angles differently).
Solution Approach 2:
The measurement is extended from a single angle to multiple angular dimensions. By positioning detectors at different angular positions relative to the surface normal, the system adds an angular dimension to the measurement space, enabling differentiation between various physical causes of color changes.
2Measurement precision
If radiation is measured only at the reflection angle, then the measurement is straightforward, but it cannot detect changes in pigment orientation that affect scattered light
Solution Approach 1:
Different detector positions are assigned different functional roles based on their angular locations. The detector at the reflection angle primarily detects layer thickness information, while detectors at other angles detect pigment orientation information. Each detector's position is optimized for its specific measurement purpose.
Solution Approach 2:
The angular position of detector devices serves as an intermediary parameter that mediates between the radiation source and the surface properties being measured. By varying the angular position, the system selectively probes different aspects of surface structure (layer thickness vs. pigment orientation).
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 precise identification of the physical causes of color changes, allowing for quality control of painting devices and ensuring consistent pigment distribution, thereby improving the accuracy of surface property analysis.
Implementation Method 1
a first radiation device which emits radiation onto a surface to be analysed and at least a first radiation detector device which receives at least part of the radiation emitted by the at least one radiation device and then scattered and/or reflected by the surface
Implementation Method 2
at least a first radiation detector device which receives at least part of the radiation emitted by the at least one radiation device and then scattered and/or reflected by the surface
Data Source
AI summary
Disclosed is an apparatus for determining surface properties, comprising at least a first radiation device which emits radiation onto a surface to be analysed, at least a first radiation detector device which receives at least part of the radiation emitted by the at least one radiation device and then scattered or reflected by the surface and outputs at least a first measurement signal which is characteristic of the reflected or scattered radiation, and at least a second radiation detector device which receives at least part of the radiation emitted by the at least one radiation device and then scattered or reflected by a surface and outputs at least a second measurement signal which is characteristic of the reflected or scattered radiation. According to the disclosure, the first radiation detector device is offset by a first predefined angle β1 with respect to the direction of the radiation reflected by the surface, and the further radiation detector device is offset by further predefined angle γ1 with respect to the direction of the radiation reflected by the surface, and the ratio between the value of the further predefined angle γ1 and the value of the first predefined angle β1 is at least 1.5:1.