Cylindrical Turbidimeter Vial Optical Shielding
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Solution Overview
Problem
Nephelometric turbidimeters face issues with secondary signals due to light reflection and fingerprints, which falsify turbidity measurements, especially in drinking water applications where the measurement light beam intensity is minimally reduced, and vials are prone to scratching and manual handling errors.
Innovation Solution
A cylindrical turbidimeter vial with a transparent body and optical shielding above the outlet window to block reflected light, a light-absorbing structure on the shielding, and axial spacing elements to prevent scratching and fingerprints, along with a control window for visual liquid level monitoring and a reinforced flange for secure vial fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no optical shielding is provided above the outlet window, then the device structure is simple, but reflected light from the liquid surface and vial cap causes secondary signals that falsify measurements
Solution Approach 1:
An optical shielding element is introduced as an intermediary component between the liquid surface and the outlet window. This shielding blocks reflected light from reaching the detector, preventing secondary signals without fundamentally changing the vial's basic structure. The shielding can be integrated into the vial cap or positioned within the vial chamber, serving as a mediator that solves the reflection problem while maintaining structural simplicity.
Solution Approach 2:
The vial system is segmented into functional zones: the transparent vial body for sample containment, the optical shielding for light blockage, and the outlet window for light transmission. By dividing the system into these segments with distinct functions, the patent achieves precise control over light paths while maintaining overall structural simplicity.
2Ease of operation
If the vial is manually exchanged for every measurement, then the device operation is flexible, but the bottom inlet window becomes prone to scratching and fingerprints cause secondary signals
Solution Approach 1:
The patent applies preliminary protective actions to prevent damage before it occurs. Axial spacing elements are pre-positioned to maintain a gap between the vial bottom and the hard surface, preventing scratches during placement. The optical shielding is pre-installed to block fingerprints and other contaminants from causing secondary signals. These preliminary protections allow manual vial exchange to continue while preventing measurement errors.
Solution Approach 2:
The axial spacing elements act as a cushioning mechanism that prevents direct contact between the fragile bottom inlet window and hard surfaces. This beforehand cushioning protects the optical surface from scratches that would cause intense secondary signals, allowing operators to safely handle and exchange vials manually.
3Measurement precision
If the measurement light beam intensity is minimally reduced in drinking water applications, then the measurement sensitivity is high, but reflected light causes secondary signals many times more intense than the primary signal
Solution Approach 1:
The patent converts the harmful reflected light into a blocked light path by using the optical shielding. The shielding transforms the potential harm of strong reflected light (which would overwhelm the weak primary signal) into a beneficial blockage, ensuring that only the primary scattered light reaches the detector. This allows the system to maintain high sensitivity for low turbidity measurements without being overwhelmed by reflections.
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 significantly reduces secondary signals, minimizes light reflection, and prevents vial damage, ensuring accurate turbidity measurements by blocking reflected light and protecting the inlet window from scratches and fingerprints, while maintaining a clear visual control of the liquid level and enhancing vial fixation security.
Implementation Method 1
an optical shielding which optically blocks an inside from an outside of the turbidimeter vial and which is arranged axially above the outlet window
Implementation Method 2
the light scattered by the suspended solid particles radially exits the vial interior
Implementation Method 3
a transparent and flat bottom inlet window through which a measurement light beam axially enters the vial interior
Data Source
AI summary
A nephelometric turbidimeter with a cylindrical turbidimeter vial. The cylindrical turbidimeter vial includes a transparent vial body and a circular optical shielding configured to optically block an inside from an outside of the turbidimeter vial. The vial body comprises a transparent and flat bottom inlet window, and a transparent vial cylinder body. The vial cylinder body comprises a circular outlet window. The optical shielding is arranged axially above the outlet window of the vial cylinder body, over a part of an axial length of the vial cylinder body, and axially adjacent to a non-shielded part of the vial cylinder body which serves as the outlet window.