Flexible Optical Coupling for Scintillation Detector Light Transmission
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Solution Overview
Problem
Radiometric measuring devices face limitations in adaptability and light transmission due to thermal expansion issues and light loss when using multiple scintillators in harsh environments, particularly in containers with complex geometries, leading to reduced measuring sensitivity.
Innovation Solution
A scintillation detector with mechanically flexible optical coupling elements, such as bundles of light-conducting fibers, that maintain light transmission between scintillators, allowing for flexible adaptation to various shapes and lengths without significant light loss, and a modular protective tube design that accommodates thermal expansion without additional compensation measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple scintillators are arranged in a row with optical coupling elements to extend measurement range, then the measurement area coverage is improved, but light loss occurs between scintillators reducing measuring sensitivity
Solution Approach 1:
The patent introduces optical coupling elements as intermediary components between adjacent scintillators. These coupling elements facilitate light transmission from one scintillator to the next while minimizing light loss, thereby maintaining measuring sensitivity across extended measurement areas. The coupling elements act as mediators that bridge the optical gap between scintillators without significant energy loss.
2Stability of the object's composition
If rigid scintillation rods are used in harsh environments with temperature fluctuations, then structural stability is maintained, but thermal expansion issues impair optical coupling between scintillators
Solution Approach 1:
The patent employs mechanically flexible optical coupling elements that can dynamically adapt to thermal expansion and contraction of rigid scintillation rods. These flexible coupling elements maintain reliable optical coupling between scintillators despite temperature fluctuations, ensuring that the optical connection remains intact while the scintillators themselves maintain their rigid structural stability.
3Adaptability or versatility
If separate photoelectric converters are used for each detector to cover complex container geometries, then adaptability to different shapes is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple detection functions into a single photoelectric converter by using optically coupled scintillators that transmit light signals sequentially to one converter. This consolidation maintains the adaptability to cover complex container geometries through the extended scintillator array while reducing device complexity by eliminating the need for separate photoelectric converters for each scintillator.
4Ease of manufacture
If straight rigid scintillators are used, then manufacturing simplicity is maintained, but flexibility to adapt to different measurement locations is reduced
Solution Approach 1:
The patent segments the scintillation detection system into multiple individual scintillators connected by flexible optical coupling elements. Each scintillator can be manufactured as a simple rigid rod, but the segmented arrangement with flexible couplings allows the overall detector assembly to be adapted to various measurement locations and container geometries, combining manufacturing simplicity with installation flexibility.
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 solution enables flexible coverage of measurement areas with high sensitivity, accommodating extreme temperature fluctuations and complex container geometries, while minimizing light loss and maintaining measuring accuracy.
Implementation Method 1
two or more scintillators lined up in a row, which convert radioactive radiation striking them into flashes of light
Implementation Method 2
a photoelectric converter connected to one end of the row, which via the array converts light incident thereon into an electrical signal representative of an intensity of radiation incident on the scintillators
Implementation Method 3
optical coupling elements, which bring about a light-transmitting connection between the two adjacent scintillators
Data Source
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AI summary
A scintillation detector, more particularly for a radio metric measuring device for measuring and/or monitoring a measurement variable, more particularly a filling level of a filling material (1) situated in a container (3), is described which can cover a measurement region that can be predefined as flexibly as possible in terms of form and length. For this purpose, the scintillation detector comprises two or more scintillators (11) which are strung together in a series and which convert radioactive radiation impinging thereon into light flashes, the light of which propagates in the respective scintillator toward the ends thereof. Optical coupling elements (13) are arranged between the scintillators (11) and bring about a light-transmitting connection between the two scintillators (11) adjacent thereto. A photoelectric transducer (15) is connected at one end of the series and converts light impinging thereon via the series into an electrical signal corresponding to a radiation intensity impinging on the scintillators (11). According to the invention, at least one of the coupling elements (13) is a mechanically flexible element comprising a bundle of light-guiding fibres (17) via which the light is transmitted between the two scintillators (11) connected to one another via the fibres (17).