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Updated: Jul 20, 2026

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    Optics express
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    PubMed
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    这项研究介绍了一种212公里的混合分布式光纤传感 (DOFS) 系统. 它同时在没有重复器的前所未有的距离上测量振动和应变/温度.

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    Electronic Distance Measuring Instruments01:30

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    Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...