Contact Line Damage Detection Using Laser and X-Ray Inspection
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Solution Overview
Problem
Existing contact network damage detection methods cannot effectively detect internal damage of contact lines, leading to potential energy supply disruptions and safety risks in electrified railroads, as they primarily focus on external surface wear without addressing internal issues.
Innovation Solution
An inspection system incorporating a laser imaging radar for external surface wear detection and an X-ray transmitter-receiver pair for internal damage detection, combined with a Beidou positioning module and 5G communication for real-time monitoring and maintenance information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional wear detection methods (laser scanning, image processing, ultrasonic, optical) are used, then outer surface wear degree can be detected, but internal damage of the contact line cannot be detected
Solution Approach 1:
The patent combines multiple detection methods (laser scanning for external wear, ultrasonic detection, and X-ray detection) into a single integrated detection system mounted on the pantograph. This merging allows the system to simultaneously detect both external surface wear and internal damage of the contact line, resolving the contradiction between measurement precision for specific defects and adaptability for comprehensive detection coverage.
Solution Approach 2:
The detection system is designed with multi-functionality to perform various detection tasks: laser scanning for external wear measurement, ultrasonic detection for internal structural defects, and X-ray detection for material density variations. This universal detection capability allows a single system to address multiple detection needs, expanding the detection scope while maintaining high measurement precision for each specific defect type.
2Measurement precision
If comprehensive detection of internal and external damage is implemented, then detection accuracy improves, but system complexity increases
Solution Approach 1:
The detection system is segmented into distinct functional modules: laser scanning module for external wear, ultrasonic detection module for internal structural defects, and X-ray detection module for material density analysis. Each module independently performs its specific detection function, allowing for simplified individual component design while achieving comprehensive detection capability through modular integration. This segmentation reduces the complexity of each individual component while maintaining high overall detection accuracy.
3Reliability
If real-time monitoring is implemented with multiple detection devices, then operational safety improves, but energy consumption increases
Solution Approach 1:
The detection system operates using periodic action where the laser scanning, ultrasonic detection, and X-ray detection are activated at specific intervals during pantograph contact line interaction rather than continuously. The system performs detection at key moments when the pantograph makes contact with the contact line, allowing real-time monitoring capability while significantly reducing energy consumption compared to continuous operation of all detection devices.
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 real-time monitoring and precise positioning of both internal and external damage on contact lines, facilitating timely maintenance and reducing operational disruptions and safety threats.
Implementation Method 1
the laser imaging radar is configured to emit a laser beam to a contact line for scanning; a laser radiation reflected by the contact line is received
Implementation Method 2
a laser radiation reflected by the contact line is received
Implementation Method 3
the X-ray transmitter is configured to emit an X-ray to the contact line; the X-ray passing through the contact line enters the X-ray receiver
Implementation Method 4
since a defect medium inside the contact line has a different radiation absorption capacity from surrounding intact parts, an intensity of a ray passing through a defect part is different
Data Source
AI summary
The present disclosure provides an inspection system for contact network damage detection, including: a laser imaging radar, an X-ray transmitter, a booster, an X-ray receiver, and a control circuit board. The laser imaging radar emits a laser beam to a contact line for scanning. A laser radiation reflected by the contact line is received, and a continuous analog signal is generated, which is restored to a real-time image of the contact line. After the analog signal is converted into a digital signal on the control circuit board, a height of the contact line in a horizontal direction is calculated to determine a wear degree on an outer surface of the contact line. The booster boosts electric energy obtained by the pantograph on the contact line and supply power to the X-ray transmitter.