Journal of Theoretical, Experimental, and Applied Physics
A Cost-Effective Ultrasonic Sound Wave-Based Railway Collision Avoidance System
Abstract
U V S Seshavatharam
Railway collisions continue to pose significant safety challenges worldwide, especially in areas lacking reliable wireless infrastructure. This paper presents a cost-effective collision avoidance system that exploits ultrasonic sound wave propagation through steel rails for real-time communication between trains and trackside units. Using low-cost piezoelectric transducers, microcontroller-based signal processing, and solar-powered operation, the system enables prompt, infrastructure-independent alerts without relying on cellular or satellite networks. Operating primarily in the 20–40 kHz ultrasonic range with robust digital modulation schemes, the system overcomes noise and environmental challenges inherent to railway environments. A comparative analysis with existing Indian internet-dependent systems highlights the benefits of lower cost, improved reliability, and easier deployment for remote or difficult-to-cover rail segments. Pilot studies and detailed discussions on implementation, environmental adaptation, and integration with train control systems underscore its practical viability. This approach offers a promising complementary technology to enhance railway safety, particularly in connectivity-constrained regions.
