Mechanoluminescent Light Emitting Structure for Load Sensing
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Solution Overview
Problem
Existing load measurement technologies face challenges in achieving high sensitivity and spatial resolution simultaneously, particularly in detecting small loads and maintaining compatibility across different load ranges.
Innovation Solution
A light emitting structure incorporating a mechanoluminescent material with a contact portion having a predetermined length and a discontinuous contact surface, allowing for increased stress concentration and high-intensity light emission in response to applied loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MEMS array is configured to detect small load with high sensitivity, then measurement precision is improved, but device complexity increases and manufacturing difficulty increases
Solution Approach 1:
The patent replaces the mechanical MEMS sensing system with a photonic crystal-based optical sensing system. The photonic crystal structure exhibits mechanical properties that enable direct detection of small loads through optical signal changes, eliminating the need for complex MEMS array configurations while maintaining high sensitivity for detecting loads of 1 N or less.
Solution Approach 2:
The patent changes the fundamental sensing parameter from electrical signals in MEMS to optical signals in photonic crystals. By utilizing the optical properties of photonic crystal structures and their mechanical response to applied loads, the system achieves high measurement precision for small loads without the manufacturing complexity associated with MEMS arrays.
2Measurement precision
If contact resistance sensor uses thin metal wires to measure small load, then spatial resolution is improved, but load responsiveness deteriorates
Solution Approach 1:
The patent replaces the electrical contact resistance sensing mechanism with an optical sensing mechanism based on photonic crystals. This substitution eliminates the trade-off between spatial resolution and load responsiveness, as the photonic crystal structure can simultaneously provide high spatial resolution for load distribution measurement and high responsiveness for detecting loads of 1 N or less through direct optical signal changes.
3Ease of manufacture
If sheet-like pressure sensor uses TFT array and printing techniques, then ease of manufacture is improved, but measurement precision deteriorates
Solution Approach 1:
The patent replaces the TFT array-based electrical sensing system with a photonic crystal optical sensing system. The photonic crystal structure can be manufactured using printing techniques while maintaining high measurement precision for perpendicular loads, as the optical properties of the photonic crystals provide direct and sensitive detection of load-induced mechanical deformations.
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 light emitting structure enables high-sensitivity load measurement by emitting light of varying intensity based on the applied load, effectively detecting small loads and improving spatial resolution.
Implementation Method 1
contains a mechanoluminescent material, and includes a contact portion that has a predetermined length from the support surface of the object in a direction perpendicular to a surface of the load object
Data Source
AI summary
A light emitting structure emits light in response to a load applied to an object from a load object. In the light emitting structure are formed contacting portions which are provided on a supporting surface of the object, and which have a predetermined length from the surface of the supporting surface in a direction perpendicular to the surface of the object, wherein a stress-luminescent material is included in at least a portion of the supporting surface and the surface of the contacting portions.