Rail Bottom Ultrasonic Testing with Deflecting Phased Array Probes

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Solution Overview

Problem

Current ultrasonic testing methods for rail weld seams fail to provide full coverage of the rail bottom, leading to inefficiencies and high potential for human error in detecting flaws, which can result in rail failures.

Innovation Solution

An ultrasonic testing device and method utilizing phased array probe assemblies with deflection capabilities, allowing for full-coverage testing of the rail bottom by emitting pulsed ultrasonic beams with different incident angles and adjusting the probe's position to cover all areas.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual testing methods are used for rail bottom inspection, then operator flexibility is maintained, but testing efficiency is low and human errors increase

Engineering Contradiction:

Improvetesting efficiencyVSAvoiddetection accuracy

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent replaces manual mechanical testing operations with an automated ultrasonic testing system. The phased array probe assemblies generate ultrasonic beams that automatically scan the rail bottom, eliminating the need for manual probe movement and operation. This substitution of mechanical/manual operations with automated ultrasonic technology simultaneously improves testing efficiency and reduces human errors in detection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs phased array technology that enables dynamic control of ultrasonic beam parameters including angle, focus depth, and beam width. By electronically adjusting these parameters without physical probe movement, the system achieves comprehensive coverage of the rail bottom while maintaining high detection accuracy and operational efficiency.

Inventive Principle:

Principle #35Parameter changes

2Area of stationary object

If single crystal probes are used in testing vehicles, then rail head and rail waist coverage is complete, but rail bottom detection capability is lost

Engineering Contradiction:

Improvetesting coverage areaVSAvoidflaw detection capability

Core Design Contradiction:

Area of stationary objectVSMeasurement precision

Solution Approach 1:

The patent divides the rail bottom testing task into multiple segments by deploying phased array probe assemblies on both sides of the rail bottom. Each probe assembly targets specific zones, and their combined coverage achieves complete area coverage while maintaining detection precision through specialized phased array configurations optimized for rail bottom geometry.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from the conventional single-plane probing approach to a multi-dimensional configuration by placing probes on both sides of the rail bottom at different positions and angles. This spatial arrangement enables ultrasonic beams to penetrate and scan the entire rail bottom volume, achieving complete coverage without compromising detection precision.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Measurement precision

If phased array probes are positioned on both sides of weld seam, then flaw detection in different directions is improved, but device complexity increases

Engineering Contradiction:

Improveflaw detection capabilityVSAvoidprobe assembly configuration

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent employs phased array probe assemblies that are multi-functional and can be positioned on both sides of the weld seam. These probes serve multiple purposes: detecting flaws from different directions, compensating for each other's blind spots, and providing comprehensive coverage. The standardized phased array design maintains manageable complexity while achieving enhanced detection capabilities through its versatile configuration.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 solution enables automatic, full-coverage flaw detection in the rail bottom, reducing human error and increasing testing efficiency, thus enhancing the reliability of rail weld seam inspections.

Implementation Method 1

the phased array probe forms a contact area with the working surface and generates pulsed ultrasonic beams with different incident angles to enter the rail bottom for flaw testing

Methodology Applied

Scientific EffectUltrasonic beam generation: Ultrasound

Implementation Method 2

the phased array probe can be deflected relative to the rail bottom to realize full-coverage testing for the rail bottom

Methodology Applied

Scientific EffectProbe deflection:

Data Source

PatentUS20250155412A1Ultrasonic testing device for rail bottom and testing method using the same

Publication Date: 2025.05.15 SHANGHAI ORIENTAL MARITIME ENG TECH CO LTD

AI summary

The invention discloses an ultrasonic testing device for rail bottom and a testing method using the same. Top surfaces of both sides of the rail bottom include at least one working surface respectively, and the working surface is at least provided with one set of phased array probe assemblies. Each set of phased array probe assemblies includes two phased array probes distributed on both sides of a weld seam, and the phased array probe forms a contact area with the working surface and generates pulsed ultrasonic beams with different incident angles to enter the rail bottom for flaw testing. The phased array probe can be deflected relative to the rail bottom to realize full-coverage testing for the rail bottom.