论文摘要
作为物料输送的一种特种设备,压力管道在工业生产和人民生活中起着重要作用。由于管道运输介质大多是强腐蚀性流体,在运送过程中,流体的腐蚀、温度变化、压力控制引起的液压冲击及人为破坏等因素,容易引起管道输送系统运行故障,影响人们生命和财产安全,因此对管道运输状况进行实时监测是十分必要的。管道输送状况的基本参数包括压力、温度以及流量等。其中,管道物料的运输主要利用压力能也即管道内流体压力差来维持,对管道压力的监测及控制管内传输压力,是确保整个管道系统安全平稳运行的关键,因而,压力的在线监测就显得尤为重要。目前,对管道压力的传统的检测方法主要是介入式测量方法,即在被测点安装压力传感器,感压元件直接与被测介质接触。这类方法一般会破坏管道的整体结构特性以及管道内流体流场,特别在高压情况下易造成事故。本文涉及一种基于管道形变的非介入式的光纤Bragg光栅管道压力检测方法,对受内压作用下管道的压力检测进行了理论分析和实验研究。压力管道采用长度为500mm、外径×厚度为(D114×2的用于输送低压流体的碳素结构钢(GB/700-1999)Q195焊管,其尺寸参照国家应用标准系统给出的关于管子尺寸系列标准,即GB/T17395。通过SB-4.0型手动试压泵对压力管道进行加、卸压试验。主要研究内容如下:(1)在内压的作用下,压力管道的环向和轴向将产生压应力,从而导致沿管线环向和轴向粘贴在管道外壁上的光纤Bragg光栅发生相应的Bragg波长移位。通过这一理论建立数学传感模型。(2)根据厚壁圆筒的弹性分析,即Lame应力公式,结合广义胡克定律,将相关参数代入管道压力测量的数学模型,计算得出其环向和轴向的响应灵敏度分别为:179.6pm/MPa、37.9pm/MPa;理论分辨率分别为:0.006 MPa/pm、0.026 MPa/pm。(3)试验表明,沿管道环向和轴向的测量灵敏度分别为:环向为181.1 pm/MPa;轴向为26.7 pm/MPa;实际分辨率分别为:0.006 MPa/pm、0.037 MPa/pm。
论文目录
相关论文文献
- [1].Testing the Universality of Free Fall by Comparing the Atoms in Different Hyperfine States with Bragg Diffraction[J]. Chinese Physics Letters 2020(04)
- [2].Theoretical Simulation of the Temporal Behavior of Bragg Diffraction Derived from Lattice Deformation[J]. Chinese Physics Letters 2020(07)
- [3].固定于水面的多个半圆形结构物的水波Bragg反射[J]. 上海交通大学学报 2019(09)
- [4].基于光纤Bragg光栅传感器的车辆载重动态检测系统的初步开发[J]. 通讯世界 2016(24)
- [5].Spectral Beam Combining of Fiber Lasers by Using Reflecting Volume Bragg Gratings[J]. Chinese Physics Letters 2016(12)
- [6].Proton Bragg Peak Irradiation Experiment of Components for Aerospace[J]. Annual Report of China Institute of Atomic Energy 2019(00)
- [7].光纤Bragg光栅振动传感器的标定与不确定度分析[J]. 机械科学与技术 2020(11)
- [8].BRIGHT:the three-dimensional X-ray crystal Bragg diffraction code[J]. Nuclear Science and Techniques 2019(03)
- [9].Periodic structural defects in Bragg gratings and their application in multiwavelength devices[J]. Photonics Research 2016(02)
- [10].Wave Power Focusing due to the Bragg Resonance[J]. China Ocean Engineering 2017(04)
- [11].基于光纤Bragg光栅传感器的现役高桩码头结构健康监测系统设计与实施[J]. 水道港口 2016(02)
- [12].Numerical Simulation of Bragg Reflection Based on Linear Waves Propagation over A Series of Rectangular Seabed[J]. China Ocean Engineering 2008(01)
- [13].Design of a Solid-Core Large-Mode-Area Bragg Fiber[J]. Chinese Physics Letters 2015(05)
- [14].An introduction to Bragg diffraction-based cold atom interferometry gravimeter[J]. Instrumentation 2015(04)
- [15].Interrogating a Fiber Bragg Grating Vibration Sensor by Narrow Line Width Light[J]. Journal of Electronic Science and Technology of China 2008(04)
- [16].Demodulation System for Fiber Bragg Grating Sensors Using Digital Filtering Technique[J]. Transactions of Tianjin University 2008(01)
- [17].Modification of Interfacial Performance of Fiber Bragg Grating Embedded in the Composite Materials[J]. Journal of Wuhan University of Technology(Materials Science) 2017(04)
- [18].Bragg reflection in a quantum periodic structure[J]. Chinese Optics Letters 2015(12)
- [19].基于光纤Bragg光栅的采动支承压力分布试验研究[J]. 西安科技大学学报 2016(02)
- [20].低能质子的Bragg曲线测量[J]. 中国原子能科学研究院年报 2017(00)
- [21].Two-dimensional non-spatial filtering based on holographic Bragg gratings[J]. Chinese Physics B 2010(07)
- [22].Fiber Bragg Gratings in Small-Core Ge-Doped Photonic Crystal Fibers[J]. Journal of Electronic Science and Technology of China 2008(04)
- [23].Thermal characteristics of Fabry–Perot cavity based on regenerated fiber Bragg gratings[J]. Chinese Optics Letters 2018(12)
- [24].Damage and recovery of fiber Bragg grating under radiation environment[J]. Chinese Physics B 2018(09)
- [25].光纤Bragg光栅倾角传感器的标定与不确定度分析[J]. 光学技术 2017(03)
- [26].Irradiation effect on strain sensitivity coefficient of strain sensing fiber Bragg gratings[J]. Chinese Physics B 2014(01)
- [27].基于3G的光纤Bragg光栅地层沉降监测系统[J]. 传感器与微系统 2013(09)
- [28].Theoretical analysis of polarization properties for tilted fiber Bragg gratings[J]. Science China(Information Sciences) 2010(02)
- [29].一种基于光纤Bragg光栅传感器的挡土墙变形监测技术[J]. 传感器与微系统 2010(11)
- [30].Mechanism of Bragg Diffraction-Assisted Light Extraction in GaN-based Light-Emitting Diodes Based on a Self-Consistent Model[J]. Communications in Theoretical Physics 2009(09)