Ultrasonic Transducer Arrangement for Multi-Angle Rail Inspection
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Solution Overview
Problem
Conventional ultrasonic testing systems for detecting defects in materials, particularly in rails, require multiple test heads and complex device technology, leading to increased time and cost due to the need for various sound directions and angles, and often suffer from superimposition of sound waves from different transducers.
Innovation Solution
A simplified ultrasonic probe system with a transducer arrangement that approximates a sector of an elementary wave using a curved linear array of transducer elements, allowing for simultaneous coverage of multiple angles with reduced superimposition of sound waves and a more compact test head design, utilizing a small number of transducer elements and enabling efficient energy distribution and data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple fixed-angle probes operating in parallel are used, then multiple sound directions are achieved, but device complexity and test time increase
Solution Approach 1:
The patent combines multiple transducer elements with different fixed angles into a single integrated probe head. This allows multiple sound directions to be achieved without requiring multiple separate probes, thereby reducing device complexity while maintaining the capability to inspect from multiple angles simultaneously
Solution Approach 2:
The single probe head design performs multiple inspection functions that would traditionally require separate specialized probes. By integrating multiple transducer elements with different angles into one universal probe, the system achieves versatility without proportionally increasing device complexity
2Adaptability or versatility
If phased array technology is used, then multiple angles are realized with a single probe, but instrumentation demands and test time increase
Solution Approach 1:
The probe head is segmented into multiple independent transducer elements, each with a fixed angle. This segmentation allows each element to operate independently with its own optimal angle, achieving multiple sound directions through simple hardware integration rather than complex phased array control systems
Solution Approach 2:
Instead of using a single transducer element with electronically adjustable angles (phased array), the patent inverts the approach by using multiple fixed-angle elements. This hardware-based solution replaces complex electronic beam steering with simpler parallel operation of multiple dedicated transducers
3Adaptability or versatility
If multiple transducers are used, then coverage of multiple angles is achieved, but sound wave superimposition occurs
Solution Approach 1:
Each transducer element is designed with a specific fixed angle optimized for particular defect orientations. By assigning different angular characteristics to different elements, the system achieves local optimization where each element targets specific defect types, reducing unwanted sound wave interference while maintaining comprehensive coverage
4Reliability
If conventional ultrasonic testing systems are used, then defect detection is achieved, but time and cost increase due to complex device technology
Solution Approach 1:
The parallel operation of multiple transducer elements allows continuous inspection without the need to sequentially activate different probes or adjust angles. All elements can operate simultaneously, maintaining continuous useful action and significantly reducing inspection time while preserving reliable defect detection
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
This approach enables more efficient detection of defects with higher energy density and reduced device complexity, allowing for faster testing and improved result presentation, while maintaining manageable device technology and installation space, and enabling the use of simplified algorithms like SAFT.
Implementation Method 1
A connected device generates the electrical transmission pulses and receives the electrical signals from the ultrasonic transducer
Implementation Method 2
These signals are generated when an echo, reflected or scattered, for example, from the back wall or a defect in the material, reaches it
Implementation Method 3
The transducers enable, for example, a high energy input into the material being tested and the coverage of multiple angles of incidence simultaneously
Implementation Method 4
The transducer arrangement according to the invention allows the simultaneous coverage of multiple angles of incidence and largely prevents overlap of sound waves coupled into the material by different transducers
Data Source
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AI summary
The invention describes a transducer comprising at least three transducer elements that approximate a sector of an elementary wave with a virtual point source, as well as a transducer arrangement comprising three transducers comprising at least three transducer elements, wherein the transducers are arranged in cross-section along the shorter base and the two non-parallel legs of a virtual trapezoid. Furthermore, the invention relates to an ultrasonic probe system with the transducer arrangement according to the invention and a testing method with a transducer comprising at least three transducer elements, wherein the number of transducer elements is virtually magnified.