基于光纤布拉格光栅和法—珀传感器的人体健康参数测量方法研究

发布时间：2018-04-26 06:42

  本文选题：光纤布拉格光栅 + 光纤法-珀传感器　； 参考：《中北大学》2017年硕士论文

【摘要】：人体健康参数的检测对于评估人体健康状况、及早发现健康隐患有重要意义,是疾病发现、控制和治疗的前提。光纤传感器由于其体积小重量轻、可弯曲、对电磁绝缘等特性,在生物医学传感方面具有无可比拟的优势。本文使用两种光纤传感器——光纤布拉格光栅传感器和光纤法-珀传感器对人体健康参数测量技术进行研究。对光纤传感器和其他类型生物医学传感器进行了介绍,重点讨论光纤布拉格光栅传感的原理和光纤法-珀传感器的传感原理。设计光纤布拉格光栅传感器对骨骼受力形变程度进行检测。为了准确获取测量数据,首先对光纤布拉格光栅传感器进行标定,通过标定实验获取了光纤所在位置形变程度和光栅反射峰中心波长之间的关系式。搭建光纤布拉格光栅骨骼受力形变测试系统,对骨骼受力时的形变情况进行检测,实验证明光纤布拉格光栅传感器可以准确地检测骨骼的形变程度,灵敏度可达39.00525pm/mm。用光纤熔接机和气压泵,以单模光纤和玻璃管为材料,制作了一种光纤端面微型法-珀传感器,制作过程简单高效,微型传感腔结构紧凑,壁厚仅为几微米。在人体典型幅值范围内对其进行压强测试,实验表明压强增大时光谱向波长更长、频率更低的方向移动,压强测试灵敏度达到0.3pm/mmHg。制作了腔长不同的两个光纤端面微型法-珀传感器,使用二甲基硅油将两个传感器封装在一个结构里并进行温度传感实验,实验显示:两个传感器都能较好的反映温度变化,其中腔长较短的传感器灵敏度为55.615pm/℃,腔长较长的传感器灵敏度为43.55pm/℃。对比可知,腔长较短的传感器光谱更平滑、相位周期更长,实验证明腔长较短的传感器在灵敏度方面有更好的表现。本文提出了一种二氧化硅材质的光纤端面微型法-珀传感器,此种传感器生产成本低、机械强度大,在人体典型幅值范围内的压强、温度灵敏度良好,可被应用于人体健康参数的检测。
[Abstract]:The detection of human health parameters plays an important role in the evaluation of human health and the early detection of potential health hazards, which is the premise of disease detection, control and treatment. Fiber optic sensors have unparalleled advantages in biomedical sensing due to their small size, flexible, electromagnetic insulation and other characteristics. In this paper, two kinds of fiber optic sensors, fiber Bragg grating sensor and fiber Fabry-Perot sensor, are used to study the measurement technology of human health parameters. Fiber optic sensors and other biomedical sensors are introduced in this paper. The principle of fiber Bragg grating sensor and the sensing principle of fiber Fabry-Perot sensor are discussed in detail. A fiber Bragg grating sensor is designed to detect the deformation of bone. In order to obtain the measurement data accurately, the fiber Bragg grating sensor is calibrated at first, and the relationship between the deformation degree of the fiber position and the center wavelength of the grating reflection peak is obtained by the calibration experiment. A fiber Bragg grating (FBG) system was set up to measure the deformation of the bone. The experimental results show that the fiber Bragg grating sensor can accurately detect the deformation degree of the bone, and the sensitivity can reach 39.00525pm / mmm. Using optical fiber welding machine and air pressure pump, a kind of optical fiber end face miniature method-Perot sensor is fabricated with single mode optical fiber and glass tube as material. The fabrication process is simple and efficient, the structure of micro sensor cavity is compact, and the wall thickness is only several microns. The experimental results show that the spectrum shifts to the direction of longer wavelength and lower frequency when the pressure increases, and the sensitivity of the pressure measurement reaches 0.3 pm / mmHg. Two micro-Fabry-Perot sensors with different cavity length were fabricated. The two sensors were encapsulated in a single structure with dimethyl silicone oil and the temperature sensing experiments were carried out. The experiment shows that both sensors can reflect the temperature change well. The sensitivity of the sensor with shorter cavity length is 55.615pm/ 鈩，

本文编号：1804954