Phased Array Probe Calibration via FMC and Ray-Tracing
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Solution Overview
Problem
Current calibration processes for phased array ultrasound technology (PAUT) in girth weld inspection are time-consuming, require high expertise, and compromise on calibration time and performance due to the complexity of setting up multiple beam configurations for each zone, necessitating a method to automate the calibration and improve detection performance and reproducibility.
Innovation Solution
The use of Full Matrix Capture (FMC) acquisition technique combined with an optimization method to determine the best acoustic parameters for PAUT beams, allowing for automated calibration by simulating beam configurations based on operator inputs and known reference samples, reducing the need for manual adjustment and improving detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration of multiple beam configurations is performed for each zone, then detection performance can be optimized, but calibration time increases significantly and requires high operator expertise
Solution Approach 1:
The system performs self-calibration by automatically adjusting beam parameters based on received signals from reflectors. The processor independently determines optimal steering angles, apertures, and focalizations without requiring manual operator intervention, thereby reducing calibration time while maintaining detection performance.
Solution Approach 2:
The system automatically varies beam parameters (steering angle, aperture position and size, focalization) to optimize detection for each zone. By programmatically changing these parameters based on reflector positions and signal characteristics, the system achieves optimized detection performance without manual calibration for each parameter combination.
2Reliability
If multiple beam configurations are calibrated for each zone, then detection coverage is improved, but device complexity and operator skill requirements increase
Solution Approach 1:
The inspection space is divided into multiple zones, each with its own calibration parameters. The system automatically segments the calibration process by identifying reflectors in different zones and applying zone-specific beam configurations, thereby improving detection coverage while automating the complexity management.
Solution Approach 2:
A single FMC acquisition serves multiple functions: it provides raw data for evaluating any PAUT inspection result, enables automatic calibration across all zones, and supports optimization of beam parameters. This multi-functionality reduces the need for separate calibration procedures for each zone while maintaining comprehensive detection coverage.
3Adaptability or versatility
If FMC acquisition is used to evaluate any PAUT inspection result, then versatility is improved, but data processing complexity increases
Solution Approach 1:
The system performs preliminary FMC acquisition that captures all necessary ultrasonic data in a single measurement. This preliminary data collection enables subsequent evaluation of any PAUT inspection result without requiring additional measurements, thereby achieving versatility while managing processing complexity through upfront data capture.
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 significantly reduces calibration time, enhances detection performance, and improves reproducibility by automating the calibration process for PAUT systems, enabling faster and more accurate inspections with tighter tolerance settings.
Implementation Method 1
phased array ultrasound technology (PAUT)
Implementation Method 2
each beam is impacted by the definition of a transmitter and a receiver
Data Source
AI summary
A calibration method for calibrating a phased array probe that is used for testing girth welds for defects. The method utilizes a calibration device on which is defined a series of reflectors that correspond to a series of target zones. The phased array probe is placed via a wedge relative to the calibration device and the phased array probe is configured with an initial set of acoustic parameters which define at least a transmitting aperture, a receiving aperture and a beam steering angle. Using a Full Matrix Capture (FMC) acquisition process and a ray-tracing module, the values of the initial set of acoustic parameters are optimized to evolve a final set of acoustic parameters which the phased array probe utilizes for testing actual devices for weld defects.