Particle Sensor Chamber Positioning for Measurement Accuracy
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Solution Overview
Problem
Existing sensor arrangements for determining particle features, such as size, are inefficient and prone to measurement inaccuracies, especially when particles pass through the focus of a laser beam, as the measurable particle cross-section is dependent on the laser beam's cross-section, leading to reduced measurement quality outside the focus.
Innovation Solution
A sensor arrangement that includes an emitter, detector, measurement chamber, evaluation unit, and locating unit, allowing for precise determination of particle positions within the radiation field by displacing the measurement chamber along a positioning axis, enabling the assignment of radiation diameters to measured particle features and using calibration curves or correction factors to maintain consistent measurement quality across different positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the measurement chamber is positioned outside the focus of the laser beam, then the measurable particle cross-section is larger, but measurement accuracy deteriorates
Solution Approach 1:
The system performs preliminary positioning of the measurement chamber using the locating unit before measurement begins. The radiation diameter at each position is predetermined and stored, allowing the system to pre-select optimal measurement positions and apply appropriate correction factors in advance, ensuring both adequate particle cross-section and measurement accuracy are maintained.
Solution Approach 2:
The system changes the parameter of radiation diameter by moving the measurement chamber to different positions along the laser beam. By storing radiation diameters for multiple positions and selecting appropriate positions based on particle size requirements, the system optimizes the balance between measurable cross-section and measurement precision through parameter variation.
2Measurement precision
If the measurement chamber is positioned at the focus of the laser beam, then measurement accuracy is improved, but the measurable particle cross-section is reduced
Solution Approach 1:
The system dynamically positions the measurement chamber along the laser beam using the locating unit, allowing flexible adjustment between focus and non-focus positions. This dynamic positioning capability enables the system to adapt to different measurement requirements, moving to the focus for high-precision measurements of small particles and away from the focus for larger particles requiring greater cross-section.
Solution Approach 2:
The measurement chamber system is designed to be multi-functional, capable of operating at multiple positions along the laser beam. By storing radiation diameter information for various positions and implementing a selection mechanism, the system achieves universality in handling different particle size ranges and measurement requirements, making it adaptable to diverse measurement scenarios.
3Adaptability or versatility
If multiple measurement positions are used to accommodate different particle sizes, then measurement versatility is improved, but device complexity increases
Solution Approach 1:
The system segments the measurement space into multiple discrete positions along the laser beam, each with known radiation diameter characteristics. By dividing the continuous beam path into measurable segments and associating specific particle size ranges with each segment, the system achieves versatility without requiring complex continuous adjustment mechanisms, thus controlling device complexity while improving adaptability.
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
This approach allows for more accurate and efficient determination of particle features by maintaining a consistent measurement range between maximum and minimum particle diameters, independent of the measurement chamber's position, thereby improving measurement quality and reducing inaccuracies associated with varying radiation cross-sections.
Implementation Method 1
an emitter (14) for emitting electromagnetic radiation (16)
Implementation Method 2
a detector (22) for receiving the radiation (16) emitted from the emitter (14) and for providing detector signals as a function of the received radiation
Data Source
AI summary
A sensor arrangement for detecting features of particles includes an emitter for emitting electromagnetic radiation, a detector for receiving the radiation emitted from the emitter and for providing detector signals as a function of the received radiation, a measurement chamber configured to be irradiated by the radiation emitted by the emitter and to receive particles flowing therethrough, an evaluation unit for evaluating the detector signals, and a locating unit for locating the measurement chamber with respect to a reference point of a coordinate system, so that a respective position of a respective particle within the radiation is determinable.