Deformable Part Sensor Sealing Liquid for Acoustic Emission
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Solution Overview
Problem
Existing acoustic emission sensors face challenges in maintaining stable characteristics due to liquid leakage issues, particularly when subjected to external forces like sound waves, which affects their sensitivity and reliability in detecting ultrasonic vibrations and cracks in materials.
Innovation Solution
A sensor design featuring a first structure body with a deformable part and a membrane part, where a liquid is sealed between the structure bodies, with the membrane part being softer and less rigid than the deformable part, and a detector outputs signals based on the deformation, enhancing stability and sensitivity by suppressing liquid leakage and allowing for wide bandwidth frequency characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid is provided between the first structure body and the second structure body to enable wide bandwidth frequency characteristics, then the sensor achieves high sensitivity and wide frequency range detection, but liquid leakage occurs when subjected to external forces, affecting stability and reliability
Solution Approach 1:
The membrane part is pre-installed to seal the liquid before external forces are applied, preventing liquid leakage in advance. The membrane part is connected to both the deformable part and the supporter, creating a sealed environment that maintains liquid containment under various operating conditions including impact and vibration.
Solution Approach 2:
The membrane part acts as an intermediary element between the deformable part and the external environment, transferring mechanical deformation to the liquid while preventing direct contact between the liquid and external forces that could cause leakage. This intermediary structure enables the liquid to contribute to wide bandwidth frequency characteristics without suffering from leakage issues.
2Object-affected harmful factors
If the membrane part is made softer and less rigid than the deformable part to suppress liquid leakage, then liquid containment is improved, but the structural rigidity for detecting ultrasonic vibrations may be compromised
Solution Approach 1:
Different parts of the sensor structure have different rigidity characteristics optimized for their specific functions. The membrane part is made softer to prevent liquid leakage, while the deformable part maintains sufficient rigidity for detecting ultrasonic vibrations. The supporter provides structural stability, creating a gradient of rigidity across different components that resolves the contradiction between leakage prevention and detection capability.
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 sensor achieves stable operation and high sensitivity across a wide frequency range, improving its ability to detect ultrasonic vibrations and cracks, while also enhancing impact resistance and maintaining stable characteristics over time.
Implementation Method 1
a deformable part supported by a first portion of the supporter... The detector outputs a signal corresponding to a deformation of the deformable part
Implementation Method 2
AE (Acoustic Emission) sensor is used to detect vibrations in the acoustic and ultrasonic bands. AE is, for example, an elastic wave in the ultrasonic band generated by the occurrence and/or propagation of a crack
Data Source
AI summary
According to one embodiment, a sensor includes a first structure body, a second structure body, and a detector. The first structure body includes a supporter, a deformable part supported by a first portion of the supporter, and a membrane part. At least a portion of the membrane part is connected to the deformable part and a second portion of the supporter. The second structure body is connected to the first structure body. A liquid is provided between the first structure body and the second structure body. The detector outputs a signal corresponding to a deformation of the deformable part.