Turbidity Sensor Head Using Prism for ISO 7027 Compliance
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Solution Overview
Problem
Conventional turbidity sensor designs struggle to meet the 90-degree measurement angle requirement of ISO 7027 standards due to dimensional limitations, making it difficult to achieve a compact and effective turbidity measurement setup.
Innovation Solution
The turbidity head incorporates a light source, photodetector, and reflectors, such as prisms or reflective films, positioned to achieve a measurement angle of 90 degrees ± 2.5 degrees, allowing for a compact arrangement within a housing of approximately 13mm diameter by using reflectors to bend the light rays and enable efficient turbidity measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional turbidity sensor designs are used, then the measurement angle requirement of ISO 7027 standards cannot be met, but the housing size can be reduced
Solution Approach 1:
The patent uses a prism to redirect the light path from the light source to the detector at a 90-degree angle, effectively utilizing the third dimension (depth) to achieve the required measurement angle without increasing the housing diameter. This dimensional approach allows compact packaging while maintaining ISO 7027 compliance.
Solution Approach 2:
The prism acts as an intermediary optical element that mediates between the light source and detector, enabling the light to travel along a bent path that achieves the 90-degree measurement angle requirement without requiring the light source and detector to be positioned far apart, thus reducing housing size.
2Measurement precision
If a 90-degree measurement angle is achieved using conventional methods, then the measurement precision complies with ISO 7027 standards, but the device complexity increases
Solution Approach 1:
The patent combines the light source, detector, and prism into a single integrated turbidity head assembly with a unified optical path. This merging of components simplifies the overall device architecture while maintaining the precise 90-degree measurement angle required for ISO 7027 compliance.
Solution Approach 2:
The prism serves multiple functions: it redirects the light path to achieve the 90-degree measurement angle, maintains optical alignment between the light source and detector, and enables compact packaging. This multi-functionality reduces the need for additional alignment mechanisms and simplifies the overall device complexity.
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 allows for a compact and effective turbidity measurement that meets ISO 7027 standards, enabling accurate turbidity monitoring while maintaining a small housing size, which is essential for in-situ nephelometric sensors.
Implementation Method 1
turbidity sensing provides a quick, practical indication of the relative amount of suspended solids in water or liquid solutions
Implementation Method 2
a photodetector capable of detecting an incoming light ray
Implementation Method 3
a first reflector in the path of either the outgoing light ray or the incoming light ray. The first reflector is positioned to reflect either the outgoing light ray or the incoming light ray
Data Source
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AI summary
Turbidity heads for a turbidity sensor or probe and the resulting sensor are disclosed that include a light source providing an outgoing light ray, a photodetector capable of detecting an incoming light ray; an isolator separating the light source from the detector portion; and a first reflector in the path of either the outgoing light ray or the incoming light ray. The first reflector is positioned to reflect either the outgoing light ray or the incoming light ray to achieve a measurement angle defined between the outgoing light ray and the incoming light ray of ninety degrees plus-or-minus two and a half degrees to comply with the standard ISO 7027 for turbidity measurement.