Phased Array Ultrasonic Inspection for Helical Welds
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Solution Overview
Problem
Conventional ultrasonic testing systems for inspecting helical submerged arc welds require numerous probes and frequent mechanical adjustments, leading to reduced production rates and unreliable inspections due to the complexity of seam tracking and varying pipe diameters and thicknesses.
Innovation Solution
A phased array system utilizing seven linear probes aligned with the pipe generatrix, employing novel combinations of mechanical angles, focal laws, and sound paths to inspect all standard flaws in a single pass without the need for constant mechanical adjustments, allowing for efficient detection of longitudinal and transverse defects from a single side and accommodating a wide range of pipe wall thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ultrasonic testing systems use numerous probes to inspect helical submerged arc welds, then inspection coverage and reliability are improved, but device complexity and mechanical adjustment requirements increase
Solution Approach 1:
The patent combines multiple probes into a single phased array probe with multiple elements that can be electronically controlled to simulate the functionality of multiple separate probes. This merging reduces the physical number of probes while maintaining comprehensive inspection coverage through electronic beam steering and focusing capabilities.
Solution Approach 2:
The phased array probe is designed to perform multiple inspection functions (longitudinal defect detection, transverse defect detection, wall thickness measurement) using a single multi-functional device. The probe can be electronically reconfigured to inspect different orientations and locations, eliminating the need for multiple specialized probes.
2Difficulty of detecting and measuring
If conventional systems use multiple probes for comprehensive inspection, then detection capability is improved, but mechanical adjustment frequency increases
Solution Approach 1:
The patent replaces mechanical probe adjustments with electronic beam steering and focusing controls. Instead of physically repositioning or reorienting multiple probes to detect different defect orientations, the system uses electronic phase control to steer the ultrasonic beam, eliminating mechanical adjustment requirements while maintaining comprehensive detection capability.
3Reliability
If conventional ultrasonic inspection requires opposing probe configuration from each side of the weld, then inspection thoroughness is improved, but inspection time and productivity are reduced
Solution Approach 1:
The phased array probe enables dynamic electronic reconfiguration during the inspection process. The system can switch between different beam orientations and focusing modes in real-time, allowing a single probe to perform the work of multiple probes positioned at different locations and orientations, thereby reducing inspection time while maintaining thoroughness.
4Adaptability or versatility
If the system accommodates varying pipe diameters and thicknesses, then adaptability is improved, but mechanical adjustment requirements increase
Solution Approach 1:
The phased array system uses electronic parameter changes (phase, frequency, amplitude modulation) to adapt to varying pipe dimensions. By electronically adjusting beam steering angles, focusing distances, and element activation patterns, the system can accommodate different pipe diameters and wall thicknesses without mechanical reconfiguration, maintaining adaptability while reducing complexity.
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 phased array system significantly reduces the number of probes required and eliminates the need for frequent mechanical adjustments, enabling efficient and reliable inspection of helical submerged arc welds by using a combination of mechanical and electronic adjustments to maintain effective beam coverage across varying weld angles and thicknesses.
Implementation Method 1
A phased array system utilizing seven linear probes aligned with the pipe generatrix, employing novel combinations of mechanical angles, focal laws, and sound paths to inspect all standard flaws
Data Source
AI summary
A phased array system and the inspection method which is configured to inspect the weld seam of an HSAW for all standard types of flaws located both near pipe's internal and external surfaces in one scan pass, diminishing the need of making mechanical adjustment for the probes during the one pass of scan. The configuration includes the usage of at least one linear PA probe for Lamination inspection right above HAZ zone, at least one pair of PA probes for longitudinal defects inspection and holes detection and at least two pairs of PA probes for transversal defect inspections.