Infrared Thermal Imager Solutions for the Rail Transit Industry

March 12, 2026
9:14 am

I. Onboard Equipment Monitoring Applications

1. Real-Time Monitoring and Early Warning of Pantographs and Catenaries

1) Demand Analysis:

The pantograph-catenary system of electrified railways transmits electrical energy to electric locomotives, and its quality and operating status directly affect the railway’s transportation capacity and safety. Catenaries exposed outdoors year-round are prone to oxidation, corrosion, and loose connections of components, leading to potential safety hazards.

2) Monitoring Objectives:

During train operation, real-time observe the temperature distribution on the pantograph surface to visualize the operating status, judge and diagnose equipment conditions and potential defects, issue timely early warnings for high temperatures, accurately locate fault points, and promptly detect, handle, and prevent operational accidents.

3) Monitoring Solutions:

Real-Time Display: Continuously collect temperature data including geographical location, measured values, or operating status of each measuring point on the catenary; real-time observe the thermal distribution on the pantograph surface during high-speed train movement, with clear visualization of surface defects and high-temperature points.
Equipment Defect Analysis: Plot temperature change curves of equipment, analyze status trends, assess the severity level of defects, identify potential hazard areas in advance, and provide decision support for maintenance.
Customizable Alarm Thresholds and Levels: Support multi-level alarm mechanisms to assist staff in evaluating the urgency and development trend of potential hazards.
High-Temperature Triggered Shooting and Alarm: Image capture + video recording + linkage; the monitoring background can promptly detect abnormal temperatures and trigger alarms.

Pantograph Monitoring

Catenary Suspension Monitoring

2. Real-Time Monitoring of Electrical Equipment in Electric Locomotive Cabinets

1) Monitoring Objectives:

Key heat-prone parts such as cable joints and busbar joints.

2) Monitoring Solutions:

Conduct real-time temperature monitoring of all electrical equipment in the control cabinet.
Diversified temperature measurement configurations (point, line, polygon, etc.).
Alarm output ports to realize sound and light alarms and fire-fighting linkage functions.
Equipped with functions such as data recording, trend analysis, fault diagnosis, and daily inspection.

II. Traction Substation Monitoring Applications

1. Solution–24/7 Online Monitoring

Adopt multi-mode deployment and diversified monitoring to address key issues such as numerous substation equipment, potential hazards, and dangerous points. Realize real-time monitoring of power equipment operating status and fault early warning, overcome the limitations of traditional single-optical monitoring, and truly achieve 24/7 real-time monitoring – especially providing strong support for the safe operation of substations at night.

1) Deployment Solutions:

Multi-form equipment.
Lightweight deployment + cloud platform networked deployment.

2) Monitoring Solutions:

Dynamic Dual-Optical Real-Time Monitoring: 24/7, all-weather.
Diversified Temperature Monitoring: Equipment outline + point, line, and frame.
Automatic High-Temperature Early Warning and Intelligent Linkage: Image capture + video recording + linkage.

2. Solution–Portable Handheld Inspection

Fixed-point deployment and on-demand inspection provide an infrared monitoring tool for real-time monitoring of substation equipment status, identification of abnormal points during equipment debugging, and elimination of defects during equipment maintenance.

III. Monitoring Applications for Key Track Components (Axles, Wheel Hubs)

1. Demand Analysis:

With the increase in train speed, when train axles operate under overload, friction with axle bushes generates a large amount of heat. In severe cases, the entire axle may become red-hot. If the axle temperature exceeds the ambient temperature by more than 40℃, the axle must be replaced immediately; otherwise, it will damage the bearing strength and brake pad performance, leading to axle breakage, derailment accidents, and endangering train transportation safety.

2. Equipment Installation:

Infrared thermal imagers are installed on both sides of the track to conduct real-time temperature monitoring of axle boxes when trains pass by.

Safety and Reliability: Infrared temperature measurement features non-contact, non-stop operation, no sampling, and no disassembly, without affecting the normal operation of trains; staff can monitor equipment status in real time from a safe distance or the monitoring room.
All-Weather Operation: 24/7 online real-time temperature measurement, unaffected by harsh weather such as night, rain, and fog, ensuring no abnormal conditions are missed.
High-Frame-Rate Images: 50 frames per second, without image freezing, lag, or jumping.
Automatic Early Warning and Linkage: Immediately trigger an alarm when abnormal temperatures are detected, providing train staff with specific alarm locations and axle status information; support multi-channel alarm modes (SMS, mobile phone, platform) to ensure abnormal information is notified to relevant personnel in the first place.
Health Status Assessment: Evaluate axle health based on temperature distribution, providing data support for maintenance.

IV. Railway Perimeter Security Applications 24/7 Panoramic Security Application

Adopt multi-form equipment and dual-optical fusion to realize full-scene coverage and key area control of the railway surrounding environment. Ensure issues such as unauthorized intrusion, fire detection, and perimeter environmental safety are detected in the first place, enabling intelligent supervision of the area and reducing the labor cost of manual inspections.

Key Area Security Monitoring

Intelligent Detection and Proactive Early Warning: Tripwire intrusion, area intrusion, high-temperature alarm, fire point detection, smoking detection, face capture, etc.
Alarm Linkage: Alarm output ports to realize linkage with on-site sound and light alarms and fire-fighting equipment.
Incident Tracing: Instantly record and capture alarm images, and automatically save video files before and after the alarm to enable video tracing.