T. Sudarvizhi, D. Jayasutha
High-speed trains, carrying high social and commercial value, travel at a speed over 250km/h, thus any damage to tracks would cause severe loss. Detecting events which can cause track faults is important to the safety of high-speed railway systems. Railways, crossing the vast area of plains and mountains, are vulnerable to earthquakes which can damage tracks with destructive forces. Hence there arrives a need for Earthquake Early Warning (EEW) system provides advance information of the estimated seismic intensities and expected arrival time of principal motion. These estimations can be obtained by prompt analysis of the focus and magnitude of the earthquake using wave form data observed by seismographs near the epicenter. However, conventional EEW system cannot offer satisfactory alarms for high-speed railway systems. Therefore, it is necessary to develop an EEW for high-speed railways (HREEW).One of the key issues in designing an HR-EEW system is how to offer timely alarms to trains under certain constrains, such as budget limitation and geological restriction. We propose HR-EEW systems based on wireless sensor networks(WSNs).In this proposal, we take a close look at deploying wireless sensor nodes in HR-EEW systems. We target at solving the minimum cost deployment problem while guaranteeing that any earthquake in a seismic district can be timely reported by k sensors.
Wireless Sensor Network, Earthquake Early Warning, High Speed Railway- Earthquake Early Warning, Railway Control Center.