本研究採用品質穩定且可進行動態行為監測的無溫度效應式光纖光柵感測器（A-thermal Fiber Bragger Grating，FBG）作為軌道即時變形行為之主要監測儀器，配合所開發之軌道變形計算軟體，建構以光纖感測器為主體之軌道安全監測系統，經實驗室的基本性質試驗，掌握光纖光柵感測器基本特性之後，進一步完成現地運用的安裝與測試，量測結果顯示光纖光柵感測器之訊號清晰、靈敏、穩定，可作為軌道變形及安全監洌之有效方式，本研究建構了一套完整之軌道安全預警監測之工法及軟、硬體系統，具有持續開發應用之潛力。 A-thermal type Fiber Bragger Grating sensors based on innovative fiber-optical technologies were adopted to study the track deformation behaviors. With the deformation calculating software developed from this research, the deformation shape of the rail tracks can be detected. After experiments in the laboratory to identify basic properties of the sensing devices, installation and testing of the monitoring system were carried out in field. Monitoring results demonstrate that this FBG type track safety monitoring is durable and can provide sensitive, clear, and stable signals for long term monitoring. It is believed that the technology developed from this research including the software and hardware has great potential for further development and application on the safety monitoring of track system.