IEC 61757-1-2:2023定义了光纤传感器分布式应变测量的详细规范，也称为“光纤分布式应变传感”。它适用于光纤传感器（应变敏感元件）中基于自发或受激布里渊散射的分布式应变传感系统（DSS），即能够测量绝对应变的传感器。本文件规定了最重要的DSS性能参数，并定义了确定这些参数的程序。

IEC 61757-1-2: 2023 defines detailed specifications for distributed strain measurements with a fibre optic sensor, also known as "fibre optic distributed strain sensing". It is applicable to distributed strain sensing systems (DSS) based on spontaneous or stimulated Brillouin scattering in the optical fibre sensor (strain sensitive element), that is, to sensors capable of measuring absolute strain. This document specifies the most important DSS performance parameters and defines the procedures for their determination.