On the speeding high-speed railway line, the train is like a silver lightning bolt, carrying efficiency and modernization. However, behind this extreme speed lies the severe test that the key components of the train are enduring. Among them, the axle, as the core moving part that connects the wheels and bears the entire weight of the train body, its operating condition directly affects the safety of the train. Under high-speed operation, the axle bearings are subjected to tremendous mechanical stress and complex friction. Long-term operation can easily lead to local overheating (hot axle) due to problems such as bearing wear, loose bearing shells, and abnormal axial or radial clearance. If not detected in time, the consequences would be unimaginable. The Yoseen Infrared Trackside Hotbox Detection System (THDS) adopts a 125Hz high-speed infrared thermal camera and, with its outstanding performance indicators, provides a perfect solution for online monitoring of high-speed shaft temperatures.

The traditional manual spot checks or contact temperature measurement methods have become inadequate in high-speed and dynamic operation scenarios. They are slow to respond, prone to missed detections and difficult to locate, and cannot meet the extremely high requirements of modern railways for "zero delay" in safety early warning. Therefore, non-contact, visual and high-precision infrared thermal cameras, especially online monitoring thermal cameras specifically designed for high-speed moving targets, have become an indispensable technical defense line for ensuring the safety of railway operations.

The Challenges and Solutions of High-Speed Mobile Temperature Measurement

Monitoring the temperature of the axles of a speeding train is by no means something that ordinary thermal cameras can handle. Its main technical challenges lie in:

Extremely short exposure time: When a train passes through the monitoring point at high speed, the time a single axle stays in front of the lens is measured in milliseconds. The frame rate of ordinary thermal cameras is relatively low, and they may not even be able to capture a clear thermal image, let alone continuously and accurately measure temperature.

Avoid motion ghosting: When low frame rate thermal cameras are used to capture high-speed moving targets, they can cause severe thermal image ghosting, leading to serious distortion of temperature measurement values and failing to reflect the true hot spot temperature.

Rapid thermal response: The temperature rise at the overheat point of the axle may be instantaneous. The thermal camera detector must have an extremely short thermal time constant to keep up with the rhythm of temperature changes and capture fleeting signs of overheating.

Facing these challenges, the Yoseen Infrared Trackside Hotbox Detection System (THDS) adopts a 125Hz high-speed infrared thermal camera with its outstanding performance indicators, providing a perfect solution for high-speed shaft temperature online monitoring.

Yoseen Infrared 125Hz High-Speed Thermal camera: A safety guardian born for speed

The core advantages of this thermal camera directly address all the aforementioned pain points:

125Hz ultra-high frame rate: It can generate 125 infrared thermal images per second. This means that even if the train passes at a speed of over 300 kilometers per hour, the monitoring system can capture dozens of continuous and clear thermal image sequences of the axles within an extremely short window period, completely eliminating the problems of trailing images and missed detections caused by the rapid movement of the target, achieving "every frame clear, everything at a glance".

4ms ultra-short thermal time constant: This key indicator represents the response speed of the thermal camera detector to temperature changes. The 4ms ultra-fast response ensures that the thermal camera can sensitively capture the subtle and rapid changes in the surface temperature of the axle. Even the tiny hotspots that appear suddenly have nowhere to hide, significantly moving the safety warning checkpoint forward.

Precise temperature measurement and analysis: Based on high-speed imaging, combined with advanced image processing algorithms and temperature analysis software, the system can automatically identify each axle from a vast amount of thermal image data and perform real-time and precise temperature calculation and tracking on it. Once the temperature at any position exceeds the safety threshold, the system will immediately trigger an alarm, indicating the specific axle location and providing precise fault location for maintenance personnel.

Conclusion: The security Foundation of intelligent operation and maintenance

Integrating the Yoseen Infrared Trackside Hotbox Detection System (THDS) high-speed thermal camera into key monitoring points along the railway line is like equipping a running train with "24-hour tireless sharp eyes". It has achieved all-weather, contactless, online high-speed and precise monitoring of axle temperature, transforming the traditional passive and periodic maintenance into active and predictive intelligent operation and maintenance.

This not only greatly enhances the safety redundancy of railway operation, effectively preventing major train accidents that may be caused by overheating of the shaft temperature, but also optimizes the maintenance process and reduces operation and maintenance costs. It is one of the key technical equipment for promoting the development of high-speed railways towards greater safety, intelligence and efficiency. Amid the pulsation of the steel veins, high-speed thermal cameras are silently safeguarding the safety of every journey.