光纤作为近代高科技的产物,在国民经济的诸多领域(尤其在通信领域)得到了广泛的应用。在绝大多数的应用场合,总是力求最大限度地降低光纤的传输损耗,而微弯传感器技术恰恰利用了外界扰动与光纤的传输损耗关系来实现传感器功能。本文阐述了光纤微弯损耗机理和光纤微弯传感器的工作机理,在此基础上提出了光纤微弯应变传感器系统设计模型,并据此设计了实验系统,长期的实验结果表明实验系统工作稳定、可靠。 As a modern high-tech product, optical fiber has been widely used in many fields of national economy, especially in the field of communication. In the vast majority of applications, always strive to minimize the optical fiber transmission loss, while the micro-bending sensor technology just makes use of the external disturbance and optical fiber transmission loss relationship to achieve the sensor function. This paper describes the mechanism of optical microbend loss and the working mechanism of optical microbend sensor. Based on this, the design model of optical fiber microbend strain sensor system is proposed and the experimental system is designed accordingly. The long-term experimental results show that the experimental system works stably, reliable.