Offset Fluorometer Channels for Turbid Fluid Analysis
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Solution Overview
Problem
Current fluorometric systems for monitoring the concentration of substances in fluid samples, particularly in industrial cleaning and sanitizing processes, face challenges in accurately determining the concentration of non-fluorescing species and fluorescent species due to limitations in light detection and reflection issues caused by turbidity and surface reflections, leading to suboptimal signal strength and interference.
Innovation Solution
The implementation of a fluorometer with multiple optical detectors, including an optical emitter offset from the center of the analysis area to minimize light reflection, and optical filters to filter out specific wavelengths, allowing for comprehensive monitoring of fluid samples by detecting transmitted, scattered, and fluorescent emissions, thereby enhancing signal strength and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single optical detector is used to measure fluorescence, then the device complexity is low, but the measurement precision is insufficient for determining both non-fluorescing and fluorescent species concentrations
Solution Approach 1:
The optical detection system is segmented into multiple independent detection channels, each equipped with specific optical filters to detect different wavelengths. This allows simultaneous measurement of transmitted light (for non-fluorescing species) and fluorescent emissions (for fluorescent species) without cross-interference, thereby improving concentration determination accuracy for multiple substance types.
Solution Approach 2:
The fluorometer is designed with multi-functional optical detectors that can detect multiple types of optical signals (transmitted light and fluorescent emissions) using the same physical detector components. This enables the device to determine concentrations of both non-fluorescing and fluorescent species simultaneously, achieving comprehensive measurement capability without requiring separate specialized devices.
2Reliability
If the optical emitter is positioned at the center of the analysis area, then the light distribution is symmetric, but light reflection from turbidity and surface causes interference and reduces signal strength
Solution Approach 1:
The optical emitter is deliberately positioned asymmetrically at an offset location within the analysis area rather than at the center. This asymmetric positioning changes the light propagation path to minimize reflections from turbid interfaces and surfaces, thereby reducing interference and improving the reliability of the detected signal for concentration measurements.
3Adaptability or versatility
If multiple optical detectors with filters are implemented, then the detection capability for multiple species is improved, but the device complexity increases
Solution Approach 1:
Multiple detection functions are merged into a single integrated optical detection system. The fluorometer combines transmitted light detection and fluorescent emission detection capabilities within one device, using multiple optical filters and detectors that work together in a unified configuration. This merging approach enables versatile detection of multiple species while maintaining a compact and integrated device structure.
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 configuration enables robust monitoring of fluid samples, improving the detection of both non-fluorescing and fluorescent species concentrations, extending the operational lifespan of the sensor and ensuring effective sanitization processes by providing clear and accurate data for concentration adjustments.
Implementation Method 1
Fluorometric spectroscopy concerns the detection of fluorescent light emitted by a sample of interest. It involves using a beam of light, usually ultraviolet (UV) light, that excites the electrons in molecules of certain compounds in the sample and causes them to emit light (i.e., to 'fluoresce').
Implementation Method 2
The fluorometer may include an optical emitter that detects light passing from the optical emitter and through the fluid sample to determine the concentration of a non-fluorescing species in the fluid.
Implementation Method 3
The fluorometer may further include another optical detector that detects fluorescent emissions from the fluid sample
Data Source
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AI summary
An optical sensor may have multiple detection channels to detect different characteristics of a fluid. For example, an optical sensor used in industrial cleaning and sanitizing applications may have multiple detection channels to detect when a system is both clean and properly sanitized. In one example, an optical sensor includes an optical emitter that directs light into a fluid, a first optical detector that detects light transmitted through the fluid, a second optical detector that detects light scattered by the fluid, and a third optical detector that detects fluorescent emissions emitted by the fluid. The optical emitter and optical detectors can be positioned around an optical analysis area. Depending on the application, the optical emitter may be positioned to direct light adjacent a wall of the optical analysis area rather than at a center of the optical analysis area, which may increase the strength of signal on the detection channels.