Color Sensor Leak Detection for Liquid-Cooled Server Chassis
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Solution Overview
Problem
Existing leak detection methods in liquid-cooled information handling systems are inadequate, often leading to corrosion and damage due to undetected coolant leaks, which can spread and affect multiple systems.
Innovation Solution
An optical detector system using an internal illuminator, photodetector, and signal processor to identify coolant leaks based on the color spectrum of fluorescent dye-infused coolant, employing RGB filters and plasmonic gratings to differentiate light wavelengths and convert reflected light into electrical signals for precise color-based identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing leak detection methods are used, then the system structure remains simple, but the detection precision and reliability are insufficient leading to undetected coolant leaks
Solution Approach 1:
The optical detector is divided into distinct functional segments: an illuminator that emits light, a photodetector that converts light to electrical signals, and a signal processor that analyzes the signals. This segmentation allows each component to be optimized for its specific function, improving overall detection precision while maintaining manageable complexity through modular design
Solution Approach 2:
The patent introduces an optical intermediary system using light as the detection medium. The illuminator emits light that interacts with the coolant leak, and the photodetector converts this optical interaction into electrical signals. This intermediary optical approach enables high-precision detection without requiring direct contact with the coolant, resolving the contradiction between precision and complexity
2Speed
If existing leak detection methods are used, then the device complexity is low, but the response time is slow allowing leaks to spread and cause damage
Solution Approach 1:
The patent replaces mechanical or chemical leak detection methods with an optical detection system. The illuminator and photodetector provide rapid optical signal generation and conversion, enabling fast response times. This substitution of mechanical/chemical systems with optical-electrical systems achieves high-speed detection while the integrated circuit implementation keeps complexity manageable
Solution Approach 2:
The signal processor continuously monitors the electrical signals from the photodetector, employing periodic sampling and analysis. This continuous periodic monitoring enables rapid detection of coolant leaks as they occur, improving response speed while the efficient periodic processing keeps computational complexity manageable
3Reliability
If existing leak detection methods are used, then the system is easier to manufacture, but the reliability is insufficient due to inability to distinguish coolant from other objects
Solution Approach 1:
The patent utilizes the optical properties of the coolant, detecting leaks through color-based optical identification. The photodetector captures light interactions that are characteristic of the coolant's optical properties, enabling reliable distinction from other objects. This color/optical property-based detection method achieves high reliability while maintaining ease of manufacture through the use of standard optical components
Solution Approach 2:
The signal processor analyzes multiple parameters of the electrical signals, including amplitude, frequency, and temporal characteristics, to reliably identify coolant leaks. By monitoring multiple signal parameters simultaneously, the system achieves high detection reliability. The use of standard photodetector and signal processing circuits maintains ease of manufacture despite the sophisticated parameter analysis
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 system provides high dynamic range, sensitivity, and noise rejection, enabling rapid and accurate detection of coolant leaks, distinguishing between coolant and other objects, thus preventing system damage.
Implementation Method 1
an internal illuminator configured to emit light to illuminate an object within a predetermined region of the chassis
Implementation Method 2
a photodetector configured to absorb the light across a color spectrum in response to the light being reflected from the object and to convert the light into an electrical signal
Implementation Method 3
RGB filters and plasmonic gratings to differentiate light wavelengths and convert reflected light into electrical signals for precise color-based identification
Data Source
AI summary
An optical detector for use within a chassis of an information handling system includes an internal illuminator, photodetector, and signal processor. The internal illuminator is configured to emit light to illuminate an object within a predetermined region of the chassis of the information handling system. The photodetector is configured to absorb the light across a color spectrum in response to the light being reflected from the object and to convert the light into an electrical signal. The signal processor is communicatively coupled with the photodetector and is configured to convert the electrical signal into coordinates of a predefined color space. The coordinates of the color space correspond to the color of the object. The signal processor is configured to identify the object in response to the coordinates matching a predetermined set of coordinates associated with the object.