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Advanced Railway Safety with Fiber Bragg Grating Sensors

The Axle Counter Plus (ACPS) counts the number of train axles and provides real-time information about track section occupancy. This technology utilizes Bragg Grating optical sensors, offering highly reliable axle counts and section status updates.

ACPS System
FBG Sensor

Fiber Bragg Grating (FBG) Sensors

FBG sensors are optical sensors that utilize light reflection within optical fibers to detect changes in physical parameters such as strain, temperature, and pressure. These sensors have a periodic variation in the refractive index along the fiber core, which reflects a specific wavelength of light, called the Bragg wavelength, while allowing other wavelengths to pass. When external forces (strain or temperature changes) are applied, the spacing of the grating and the refractive index change,shifting the reflected wavelength.

Advantages of FBG Technology


High Sensitivity

Accurate and reliable measurements of strain, temperature, and pressure.

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Multiplexing

Multiple FBG sensors can be embedded along a single fiber, enabling simultaneous monitoring of several points without extra wiring.


Electromagnetic Immunity

Immune to electromagnetic interference (EMI), suitable for harsh environments.

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Small Size

Compact and lightweight, easily integrated into structures.

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Stability

Excellent stability and durability with minimal signal degradation.

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Remote Sensing

Capable of transmitting data over long distances with minimal signal loss, ideal for remote applications.

Key Features of ACPS

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Accurate Axle Counting:

Utilizes advanced FBG optical sensors for precise axle detection and counting, ensuring reliable operation even in challenging environments.

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Real-Time Section Occupancy Monitoring

Continuously monitors track sections to determine whether they are occupied or clear, enhancing train traffic management and safety.

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High Reliability

Immune to electromagnetic interference, making it more dependable than traditional axle counting systems in environments with heavy electrical noise or interference.

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Durable and Low Maintenance

The FBG optical sensors are robust and require minimal maintenance, reducing downtime and operational costs.

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Enhanced Safety

Provides accurate and timely information on track section status, ensuring safe train operations by preventing potential collisions or conflicts.

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Scalable and Flexible

Can be easily integrated into various railway signaling systems, offering flexibility for different track layouts and lengths.

Axle Count Graphs

Axle Graph 1
Axle Graph 2