RCA Ultrasound Probe Apertures for Volumetric Flaw Inspection
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Solution Overview
Problem
Existing ultrasound probes face limitations in achieving high-resolution images with beam steering capabilities for volumetric inspection, particularly with two-dimensional transducers, which struggle to provide focused images across the entire object under test.
Innovation Solution
The use of a row-column addressed (RCA) array with a control circuit to drive separate apertures in the RCA array for transmission and reception, allowing for non-adjacent element subsets to transmit and receive ultrasound waves, enabling volumetric inspection through time of flight characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a two-dimensional transducer is used, then the device complexity is reduced, but the measurement precision and focusing capability deteriorate
Solution Approach 1:
The transducer array is divided into multiple independently controllable elements arranged in rows and columns. Each element can be individually addressed and controlled, allowing selective activation of specific elements or groups of elements to form dynamic apertures. This segmentation enables precise beam steering and focusing without requiring a mechanically complex two-dimensional transducer structure.
Solution Approach 2:
The patent transitions from traditional one-dimensional linear arrays to a two-dimensional matrix array configuration. This dimensional change allows beam steering in both azimuth and elevation directions, enabling volumetric inspection capabilities while maintaining manageable device complexity through electronic control of the matrix elements.
2Adaptability or versatility
If beam steering is implemented in RCA probes, then the versatility is improved, but the measurement precision deteriorates due to limitations in focusing
Solution Approach 1:
Different regions of the transducer array are assigned different functions: some elements are used for transmission while others are used for reception. The patent implements separate transmission and reception apertures with independent element selection, allowing each aperture to be optimized for its specific function. This local differentiation enables precise focusing for both transmission and reception without compromising beam steering versatility.
Solution Approach 2:
The patent implements dynamic aperture formation where the set of active elements for transmission and reception can be changed in real-time. The control circuit dynamically selects which elements are driven for transmission and which elements receive signals, allowing adaptive optimization of beam steering angles and focus positions throughout the inspection volume.
3Measurement precision
If multiple apertures are used for volumetric inspection, then the measurement precision is improved, but the productivity decreases due to multiple transmission events
Solution Approach 1:
The patent pre-configures multiple transmission apertures with their respective element subsets before the inspection process begins. The control circuit has pre-established the transmission and reception element assignments for each aperture, allowing rapid switching between apertures during inspection. This preliminary configuration reduces the overhead time for aperture switching and improves overall inspection productivity.
Solution Approach 2:
The patent implements overlapping or adjacent aperture configurations that allow continuous volumetric coverage. By carefully selecting non-adjacent elements for different apertures, the system ensures that the inspection volume is continuously covered without gaps, maintaining high productivity while achieving precise flaw detection through multiple aperture measurements.
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-resolution volumetric inspection by utilizing multiple apertures and time of flight information to detect flaws at various angles, overcoming limitations of beam steering and focusing in traditional ultrasound probes.
Implementation Method 1
a row-column addressed (RCA) array including a matrix of transducer elements arranged in rows and columns
Implementation Method 2
the plurality of separate apertures include at least two adjacent apertures separated by at least one non-driven transducer element
Implementation Method 3
enabling volumetric inspection through time of flight characteristics
Data Source
AI summary
An ultrasound probe is capable of detecting flaws in an object in a non-destructive manner. The probe includes a row-column addressed (RCA) array with a plurality of row and column electrodes. The probe can perform volumetric inspection of an object using the RCA array in different transmission and reception configurations.