High-fidelity vehicle sensing with swiftly deployed DAS system

This study demonstrates the application of an in-house developed high-performance DAS for vehicle signal detection. High-fidelity vehicle signals are successfully captured, and their spectral characteristics are thoroughly analyzed. Signal clarity is further enhanced using an S-transform-based denoising method. Notably, common telecom cable freely layed over the road surface is used as the sensing medium, eliminating the need for complex coupling treatments, which enables rapid deployment. This work presents one of the highest-quality vehicle signals acquired by DAS under similar deployment conditions. Particularly, the vehicle wheelbase is directly extracted from the DAS signal, a capability that has not been reported in previous studies.