Spherically Focused Transducer for Composite Defect Detection
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Solution Overview
Problem
Current ultrasonic testing systems for composite materials face challenges in accurately detecting defects such as foreign objects, bond line thickness, and impact damage due to limited resolution and the need for calibration blocks, which restricts their ability to characterize composite laminates effectively.
Innovation Solution
A system utilizing a spherically focused transducer within a coupling fluid-filled portable housing assembly that can operate at higher frequencies, allowing for improved resolution and detection of defects without the need for calibration blocks, and enabling the detection of smaller void regions and foreign objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional ultrasonic testing systems are used for composite materials, then the system structure is simple and ease of operation is maintained, but measurement precision and detection resolution are limited
Solution Approach 1:
The system segments the ultrasonic testing functionality into a portable housing assembly with integrated spherically focused transducer, coupling fluid system, and control electronics. This modular segmentation enables high-resolution detection while maintaining operational simplicity through integrated design.
Solution Approach 2:
A coupling fluid is introduced as an intermediary medium between the transducer and the composite material surface. This coupling fluid enables efficient ultrasonic energy transfer, significantly improving measurement precision and detection resolution without requiring complex direct-contact transducer systems.
2Measurement precision
If traditional ultrasonic testing systems operate at lower frequencies, then device complexity is reduced and ease of operation is improved, but measurement precision and ability to detect small defects deteriorates
Solution Approach 1:
The system employs a spherically focused transducer that concentrates ultrasonic energy into a focused beam. This spherical focusing geometry enables operation at higher frequencies with improved precision for detecting small defects, while the focused nature of the beam maintains operational simplicity by reducing the need for complex scanning patterns.
Solution Approach 2:
The system changes the operating frequency parameter to higher frequencies enabled by the spherically focused transducer design. This parameter change improves the ability to detect small defects and characterize composite laminates, while the integrated portable housing maintains ease of operation despite the increased frequency capability.
3Measurement precision
If calibration blocks are required for ultrasonic testing, then measurement precision can be maintained, but productivity is reduced due to additional setup time and device complexity increases
Solution Approach 1:
The portable ultrasonic testing system performs self-calibration using the coupling fluid interface and the known geometry of the spherically focused transducer. This self-service calibration mechanism maintains measurement precision without requiring external calibration blocks, thereby improving productivity by eliminating additional setup steps.
Solution Approach 2:
The system extracts the calibration function from external calibration blocks and integrates it into the portable housing assembly through the coupling fluid interface and focused transducer design. This extraction eliminates the need for separate calibration blocks while maintaining detection accuracy, thus improving inspection efficiency.
4Measurement precision
If higher frequency ultrasonic waves are used, then measurement precision and detection resolution are improved, but use of energy increases and device complexity increases
Solution Approach 1:
The spherically focused transducer concentrates ultrasonic energy into a tight focal zone, improving measurement precision and resolution. The spherical focusing geometry efficiently directs energy where needed, reducing overall energy consumption compared to unfocused high-frequency systems, while maintaining manageable device complexity through the integrated portable design.
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 achieves enhanced resolution and detection capabilities, capable of identifying smaller defects and void regions, and providing accurate characterization of composite laminates, including foreign objects and bond line thickness, without the limitations of existing systems.
Implementation Method 1
A system utilizing a spherically focused transducer within a coupling fluid-filled portable housing assembly that can operate at higher frequencies
Implementation Method 2
spherically focused transducer within a coupling fluid-filled portable housing assembly
Implementation Method 3
coupling fluid-filled portable housing assembly
Data Source
AI summary
The present disclosure provides a system and method for real-time visualization of a material during ultrasonic non-destructive testing. The system includes a graphical user interface (GUI) capable of showing a three-dimensional (3-D) image of a composite laminate constructed of a series of two-dimensional (2-D) cross sections. The GUI is capable of displaying the 3-D image as each additional 2-D cross section is scanned by an ultrasonic testing apparatus in real time or near real time, including probable defect regions that contain a flaw such as a hole, crack, wrinkle, or foreign object within the composite. Furthermore, in one embodiment, the system includes an artificial intelligence capable of highlighting defect areas within the 3-D image in real time or near real time and providing data regarding each defect area, such as the depth, size, and/or type of each defect.