Reflective Casing for Free-Flowing Sample Analysis
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Solution Overview
Problem
Existing methods for analyzing free-flowing samples, particularly dark samples like liquid manure, face challenges with sensitivity and measurement time due to the difficulty of transmission measurements and clogging issues with small gaps, and are not suitable for automatic machine-based sample feeding.
Innovation Solution
A measuring chamber enclosed by an internally reflective casing that provides diffuse illumination and allows for both transmission and reflection measurements, enabling improved sensitivity and accuracy while allowing for both manual and machine-based sample filling, using a light source and sensor to detect spectral distributions for constituent analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission measurements are used for dark samples, then measurement accuracy can be improved, but the measurement time increases and small gaps clog easily
Solution Approach 1:
The measurement process is segmented into multiple reflection measurements at different positions within the sample, allowing the system to accumulate sufficient signal data without requiring a single long transmission measurement or creating clogging-prone small gaps
Solution Approach 2:
The patent inverts the conventional transmission measurement approach by using reflection measurements instead. The sensor detects light reflected from multiple positions within the sample, providing accurate constituent analysis for dark samples without the time loss and clogging issues associated with transmission measurements
2Extent of automation
If a sensor is positioned on a flow line for continuous measurement, then automation is improved, but the device complexity increases
Solution Approach 1:
The measuring chamber with internally reflective walls serves multiple functions: it enables reflection measurements, provides diffuse illumination, and accommodates both manual and machine-based sample feeding, reducing the need for separate systems for different measurement modes
Solution Approach 2:
The system is designed to be dynamically adaptable, allowing sample introduction through openings that can be closed during measurement, and enabling both continuous flow-line integration and batch processing modes without requiring completely different device configurations
3Measurement precision
If the measuring chamber is enclosed by an internally reflective casing, then measurement accuracy for dark samples is improved, but the manufacturing complexity increases
Solution Approach 1:
The internal surface properties of the casing are modified to achieve high reflectivity in the near-infrared spectral range, which is critical for obtaining sufficient signal intensity from dark samples while maintaining a relatively simple chamber structure
Solution Approach 2:
The casing combines structural material with an internally reflective surface layer, creating a composite structure that provides both mechanical strength and optical performance, balancing manufacturing simplicity with measurement accuracy requirements
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 reduces measurement time and improves accuracy for dark samples, enabling machine-based sample handling and precise constituent analysis, with the ability to control operational parameters or store data for documentation purposes.
Implementation Method 1
the casing having at least of portion of its inner surface with a reflectivity in the spectral range
Implementation Method 2
the measuring chamber having at least a portion which is transmissive to light of a spectral range
Implementation Method 3
near infrared technology has proven itself as a technology for the constituent determination in the case of such free-flowing samples
Data Source
AI summary
An apparatus for examination of a free-flowing sample, comprising: a measuring chamber for receiving the sample, the measuring chamber having at least a portion which is transmissive to light of a spectral range; a casing configured to at least partially enclose the measuring chamber, the casing having at least of portion of its inner surface with a reflectivity in the spectral range; a light source for applying light of the spectral range to the measuring chamber; and a sensor for detecting light of the light source reflected by the sample.