Ultrasonic Scanning Device Using Liquid-Filled Cylindrical Rollers
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Solution Overview
Problem
Ultrasonic testing faces challenges in air-coupled inspection due to poor propagation of high-frequency ultrasound, and existing liquid or solid coupling methods are either contaminating the test subject or causing irreversible damage to the transducer, limiting continuous scanning of different objects.
Innovation Solution
An ultrasonic scanning device using cylindrical rollers filled with liquid, where the transducer moves relative to the test subject through rotation, ensuring efficient ultrasound propagation without direct contact and allowing for mechanical scanning without contaminating the test subject or damaging the transducer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid coupling agents are used between the ultrasonic transducer and the test subject, then ultrasound propagation is facilitated, but the test subject becomes contaminated
Solution Approach 1:
The patent introduces a liquid-filled flexible container as an intermediary medium. The container is filled with liquid coupling agent and placed between the ultrasonic transducer and the test subject. The container wall acts as a barrier that prevents direct contact between the liquid coupling agent and the test subject, thereby avoiding contamination while still facilitating ultrasound propagation through the liquid medium.
2Reliability
If a solid medium is used between the ultrasonic transducer and the test subject, then ultrasound propagation is improved, but the transducer cannot perform mechanical scanning and suffers irreversible damage when removed
Solution Approach 1:
The patent employs a flexible container that can dynamically adapt its shape and conform to the surface of the test subject. This flexibility allows the container to maintain intimate contact with the test subject surface during mechanical scanning movements, ensuring continuous ultrasound coupling while enabling the transducer to scan different areas and different test subjects without causing damage.
3Measurement precision
If the test subject is immersed in water for high-frequency ultrasonic scanning, then scanning quality is improved, but the test subject cannot be used again due to contamination
Solution Approach 1:
The flexible container serves as a portable, contained intermediary that brings the liquid coupling medium to the test subject rather than immersing the test subject in liquid. This approach maintains the benefits of liquid coupling for high-frequency ultrasound while preventing contamination of the test subject, allowing it to be reused.
4Reliability
If a rigid solid medium is used for ultrasonic coupling, then ultrasound transmission is efficient, but the medium suffers irreversible damage when the transducer is removed
Solution Approach 1:
The patent uses a flexible container with a thin, compliant wall that provides efficient ultrasound transmission while being resistant to damage. The flexible material can deform elastically during the coupling and decoupling processes, allowing the transducer to be removed and reapplied without causing irreversible damage to the coupling medium, thus maintaining its integrity for repeated use.
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
Enables high-precision, rapid ultrasonic scanning of lithium-ion batteries without contamination, providing accurate distribution diagrams of ultrasound transmission and reflection characteristics, improving battery quality and identifying defects.
Implementation Method 1
A liquid for transmitting ultrasound is stored in each cylindrical roller
Implementation Method 2
the pair of cylindrical rollers rotate around their respective axes in reverse directions
Implementation Method 3
an elastic deformation occurs on the cylindrical roller or the test subject, so that the test subject is well in contact with the pair of cylindrical rollers
Data Source
AI summary
An ultrasonic scanning device includes at least one pair of cylindrical rollers. The axes of each pair of cylindrical rollers are parallel to each other. A liquid for transmitting the ultrasound is stored in each cylindrical roller. In use, a pair of cylindrical rollers rotate around their respective axes in reverse directions, the test subject passes between the pair of cylindrical rollers and is tested by ultrasound. The ultrasonic scanning device can be applied in the field of lithium-ion battery testing. The internal flaws and health status of the lithium-ion battery can be determined by acquiring an ultrasonic image in the test subject. The device of the present invention has a simple structure and an ingenious conception, and is ready-to-use and less expensive, which is successfully applied in the field of lithium-ion battery testing.