Technological evolution from conventional point sensors to distributed acoustic sensing (DAS): a comparative review
摘要
Seismic surveying has continuously evolved, transitioning from early mechanical seismoscopes to digital, multi-channel geophone arrays that defined the industry standard since 1970s. digital seismic reflection. Today, the field is undergoing a similar shift, with conventional inertial-based systems being challenged or complemented by Distributed Acoustic Sensing (DAS) systems. This paper examines the two primary seismic systems, such as geophones/accelerometers and DAS systems by focusing on their core principle and transduction systems. Methodologically, we employ a comparative performance framework based on key metrics including sensitivity, calibration, data volume, and spatiotemporal. Furthermore, a systematic review of experimental field trials from 2010 to 2025 is conducted across eight major seismic applications to ascertain practical differences. Results reveal that while traditional sensors excel in low-frequency sensitivity and discrete three-component recording, DAS offers superior spatiotemporal resolution and broadband frequency capabilities. Recent advancements in enhanced backscattering fibers (20 m gauge length) have demonstrated the potential to lower the noise floor of DAS systems to approximately 0.15