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A Nonlinear Mirror Structure to Improve the Performance of the Distributed Fiber Temperature Sensor Based on Raman Backscattering 被引量:1
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作者 Yang Chen Yong Liu Xiao-Li Zhou Li-Xun Zhang Zhi-Yong Dai Yong-Zhi Liu 《Journal of Electronic Science and Technology of China》 2008年第4期405-407,共3页
A novel nonlinear mirror structure which can increase the optical signal-to-noise ratio of a distributed fiber Raman temperature sensor is proposed, and 6 dB improvement of the optical signal-to-noise ratio is obtaine... A novel nonlinear mirror structure which can increase the optical signal-to-noise ratio of a distributed fiber Raman temperature sensor is proposed, and 6 dB improvement of the optical signal-to-noise ratio is obtained. With the assistance of the nonlinear mirror, we demonstrate that the spatial resolution of the sensor is improved from 3 m to 1 m, and the temperature accuracy is improved from ±0.6℃ to ±0.2℃. The theoretical analysis and the experimental data are in good agreement. 展开更多
关键词 distributed Sensing fiber sensing nonlinear mirror raman baekscattering temperature sensor.
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Network Integration of Distributed Optical Fiber Temperature Sensor
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作者 Gui-Yan Li Hong-Lin Liu Zai-Xuan Zhang 《Journal of Electronic Science and Technology of China》 2008年第4期399-401,共3页
The integration of distributed optical fiber temperature sensor with supervisory control and data acquisition (SCADA) system is proposed and implemented. In the implementation of the integration, both the compatibil... The integration of distributed optical fiber temperature sensor with supervisory control and data acquisition (SCADA) system is proposed and implemented. In the implementation of the integration, both the compatibility with traditional system and the characteristics of distributed optical fiber temperature sensor is considered before Modbus TCP/IP protocol is chosen. The protocol is implemented with open source component Indy. The Modbus TCP/IP protocol used in the system is proved to be fast and robust. 展开更多
关键词 distributed optical fiber temperature sensor Modbus TCP/IP supervisory control and dataacquisition (SCADA).
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Tailoring temperature response for a multimode fiber
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作者 Han Gao Haifeng Hu Qiwen Zhan 《Opto-Electronic Science》 2025年第1期12-24,共13页
This work introduces special states for light in multimode fibers featuring strongly enhanced or reduced correlations be-tween output fields in the presence of environmental temperature fluctuations.Using experimental... This work introduces special states for light in multimode fibers featuring strongly enhanced or reduced correlations be-tween output fields in the presence of environmental temperature fluctuations.Using experimentally measured multi-tem-perature transmission matrix,a set of temperature principal modes that exhibit resilience to disturbances caused by tem-perature fluctuations can be generated.Reversing this concept also allows the construction of temperature anti-principal modes,with output profiles more susceptible to temperature influences than the unmodulated wavefront.Despite changes in the length of the multimode fiber within the temperature-fluctuating region,the proposed approach remains capable of robustly controlling the temperature response within the fiber.To illustrate the practicality of the proposed spe-cial state,a learning-empowered fiber specklegram temperature sensor based on temperature anti-principal mode sensi-tization is proposed.This sensor exhibits outstanding superiority over traditional approaches in terms of resolution and accuracy.These novel states are anticipated to have wide-ranging applications in fiber communication,sensing,imaging,and spectroscopy,and serve as a source of inspiration for the discovery of other novel states. 展开更多
关键词 multimode fiber principal mode wavefront shaping optical fiber sensor temperature response
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Highly sensitive optical fiber temperature sensor based on resonance in sidewall of liquid-filled silica capillary tube
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作者 Min Li Biao Feng Jiwen Yin 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第11期156-160,共5页
A highly sensitive optical fiber temperature sensor based on a section of liquid-filled silica capillary tube(SCT)between single mode fibers is proposed. Two micro-holes are drilled on two sides of SCT directly by usi... A highly sensitive optical fiber temperature sensor based on a section of liquid-filled silica capillary tube(SCT)between single mode fibers is proposed. Two micro-holes are drilled on two sides of SCT directly by using femtosecond laser micromachining, and liquid polymer is filled into the SCT through the micro-holes without any air bubbles and then sealed by using ultra-violet(UV) cure adhesive. The sidewall of the SCT forms a Fabry–Perot resonator, and loss peaks are achieved in the transmission spectrum of the SCT at the resonant wavelength. The resonance condition can be influenced by the refractive index variation of the liquid polymer filled in SCT, which is sensitive to temperature due to its high thermooptical coefficient(-2.98 × 10^-4℃^-1). The experimental result shows that the temperature sensitivity of the proposed fiber structure reaches 5.09 nm/℃ with a perfect linearity of 99.8%. In addition, it exhibits good repeatability and reliability in temperature sensing application. 展开更多
关键词 optical fiber sensors LIQUID FILLING temperature measurement
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DISTRIBUTED MICROBEND FIBER-OPTIC STRAIN SENSOR
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作者 孟爱东 骆飞 袁慎芳 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2000年第2期224-227,共4页
The distributed strain sensor has significant application in real time measurement of strain status for large and important engineering structures such as aircraft, bridge and dam. In this paper, a quasi distributed... The distributed strain sensor has significant application in real time measurement of strain status for large and important engineering structures such as aircraft, bridge and dam. In this paper, a quasi distributed optical fiber strain sensor system is set up using optical time domain reflect technique. The local strain sensors based on a novel microbend configuration are designed and applied to measure local strains along the optical fiber. As the result of the experimental research, the microbend sensors show high sensitivity, good linearity and repeatability in certain operation range. 展开更多
关键词 strain measurement strain sensor optical fiber sensor distributed micro bend
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Practical Pattern Recognition System for Distributed Optical Fiber Intrusion Monitoring Based on Ф-COTDR 被引量:4
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作者 CAO Cong FAN Xinyu +1 位作者 LIU Qingwen HE Zuyuan 《ZTE Communications》 2017年第3期52-55,共4页
At present, the demand for perimeter security system is in-creasing greatly, especially for such system based on distribut-ed optical fiber sensing. This paper proposes a perimeter se-curity monitoring system based on... At present, the demand for perimeter security system is in-creasing greatly, especially for such system based on distribut-ed optical fiber sensing. This paper proposes a perimeter se-curity monitoring system based on phase-sensitive coherentoptical time domain reflectometry(Ф-COTDR) with the practi-cal pattern recognition function. We use fast Fourier trans-form(FFT) to exact features from intrusion events and a multi-class classification algorithm derived from support vector ma-chine(SVM) to work as a pattern recognition technique. Fivedifferent types of events are classified by using a classifica-tion algorithm based on SVM through a three-dimensional fea-ture vector. Moreover, the identification results of the patternrecognition system show that an identification accurate rate of92.62% on average can be achieved. 展开更多
关键词 fiber optics sensors COTDR distributed vibration sensing SVM pattern recognition
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Adaptive decentralized AI scheme for signal recognition of distributed sensor systems
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作者 Shixiong Zhang Hao Li +6 位作者 Cunzheng Fan Zhichao Zeng Chao Xiong Jie Wu Zhijun Yan Deming Liu Qizhen Sun 《Opto-Electronic Advances》 CSCD 2024年第12期37-49,共13页
Artificial intelligence(AI)plays a critical role in signal recognition of distributed sensor systems(DSS),boosting its applications in multiple monitoring fields.Due to the domain differences between massive sensors i... Artificial intelligence(AI)plays a critical role in signal recognition of distributed sensor systems(DSS),boosting its applications in multiple monitoring fields.Due to the domain differences between massive sensors in signal acquisition conditions,such as manufacturing process,deployment,and environments,current AI schemes for signal recognition of DSS frequently encounter poor generalization performance.In this paper,an adaptive decentralized artificial intelligence(ADAI)method for signal recognition of DSS is proposed,to improve the entire generalization performance.By fine-tuning pre-trained model with the unlabeled data in each domain,the ADAI scheme can train a series of adaptive AI models for all target domains,significantly reducing the false alarm rate(FAR)and missing alarm rate(MAR)induced by domain differences.The field tests about intrusion signal recognition with distributed optical fiber sensors system demonstrate the efficacy of the ADAI scheme,showcasing a FAR of merely 4.3%and 0%,along with a MAR of only 1.4%and 2.7%within two specific target domains.The ADAI scheme is expected to offer a practical paradigm for signal recognition of DSS in multiple application fields. 展开更多
关键词 artificial intelligence(AI) signal recognition distributed sensor systems(DSS) distributed optical fiber sensors(DOFS)
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Fabry-Perot Temperature Sensor for Quasi-Distributed Measurement Utilizing OTDR 被引量:1
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作者 Ping Xu Fu-Fei Pang Na Chen Zhen-Yi Chen Ting-Yun Wang 《Journal of Electronic Science and Technology of China》 2008年第4期393-395,共3页
A quasi-distributed Fabry-Perot fiber optic temperature sensor array using optical time domain reflectometry (OTDR) technique is presented. The F-P sensor is made by two face to face single-mode optical fibers and t... A quasi-distributed Fabry-Perot fiber optic temperature sensor array using optical time domain reflectometry (OTDR) technique is presented. The F-P sensor is made by two face to face single-mode optical fibers and their surfaces have been polished. Due to the low reflectivity of the fiber surfaces, the sensor is described as low Fresnel Fabry-Perot interferometer (FPI). The working principle is analyzed using twobeam optical interference approximation. To measure the temperature, a certain temperature sensitive material is filled in the cavity. The slight changes of the reflective intensity which is induced by the refractive index of the material was caught by OTDR. The length of the cavity is obtained by monitoring the interference spectrum which is used for the setting of the sensor static characteristics within the quasi-linear range. Based on our design, a three point sensor array are fabricated and characterized. The experimental results show that with the temperature increasing from -30℃ to 80℃, the reflectivity increase in a good linear manner. The sensitivity was approximate 0.074 dB℃. For the low transmission loss, more sensors can be integrated. 展开更多
关键词 fiber optics Fresnel reflection optical time-domain reflectometry temperature sensor .
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Temperature dependence of the refractive index of optical fibers
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作者 王智勇 邱琪 史双瑾 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第3期256-260,共5页
Many experimental investigations on the temperature dependence of the refractive index of optical fibers have been reported previously, however a satisfying theoretical explanation for it is still absent. In this pape... Many experimental investigations on the temperature dependence of the refractive index of optical fibers have been reported previously, however a satisfying theoretical explanation for it is still absent. In this paper, a theoretical model about the temperature dependence of the refractive index of optical fibers is presented and it is in agreement with the previous experimental results. This work is a significant reference for the research and development of temperature sensors based on optical fiber delay lines. 展开更多
关键词 refractive index optical fiber temperature sensor
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Landslide Monitoring Based on High-Resolution Distributed Fiber Optic Stress Sensor
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作者 Zhi-Yong Dai Yong Liu +3 位作者 Li-Xun Zhang Zhong-Hua Ou Ce Zhou Yong-Zhi Liu 《Journal of Electronic Science and Technology of China》 2008年第4期416-419,共4页
A landslide monitoring application is presented by using a high-resolution distributed fiber optic stress sensor. The sensor is used to monitor the intra-stress distribution and variations in landslide bodies, and can... A landslide monitoring application is presented by using a high-resolution distributed fiber optic stress sensor. The sensor is used to monitor the intra-stress distribution and variations in landslide bodies, and can be used for the early warning of the occurrence of the landslides. The principle of distributed fiber optic stress sensing and the intra-stress monitoring method for landslides are described in detail. By measuring the distributed polarization mode coupling in the polarization-maintaining fiber, the distributed fiber stress sensor with stress measuring range 0 to 15 MPa, spatial resolution 10 cm and measuring range 0.5 km, is designed. The warning system is also investigated experimentally in the field trial. 展开更多
关键词 distributed fiber optic stress sensor landslides warning monitoring system.
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FIBER OPTIC TEMPERATURE MEASURING SYSTEM
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作者 马乃兵 骆飞 +1 位作者 孟爱东 杨春 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1998年第2期34-38,共5页
This paper presents a fiber optic temperature measuring system used for measuring the temperature in many occasions. The system is of reflective type and composed of thermostatic bimetal plate, lever piston framewo... This paper presents a fiber optic temperature measuring system used for measuring the temperature in many occasions. The system is of reflective type and composed of thermostatic bimetal plate, lever piston framework, optical grating and optical fiber probes. When the temperature changes, the thermostatic bimetal plate deforms. Through lever piston framework, the optical grating produces displacement in the upright direction. Thus the change of the temperature is transformed into the upright displacement of the optical grating. Optical fiber probes are used for detecting the number of streak lines of the optical grating′s displacement depending on the change of temperature. The detected signal can be transmitted to the control center through optical fiber cable up to distance of 1 km. The measurable range of this system reaches 100℃ with accuracy of ±0.2℃. 展开更多
关键词 optical fibers sensorS temperatureS thermostatic bimetal plates optical gratings
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Temperature and Salinity Dual-parameter Sensing Based on Forward Brillouin Scattering in 1060-XP SMF
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作者 LIU Pengkai ZHANG Wujun LU Yuangang 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2024年第S01期89-95,共7页
A novel temperature and salinity discriminative sensing method based on forward Brillouin scattering(FBS)in 1060-XP single-mode fiber(SMF)is proposed.The measured frequency shifts corresponding to different radial aco... A novel temperature and salinity discriminative sensing method based on forward Brillouin scattering(FBS)in 1060-XP single-mode fiber(SMF)is proposed.The measured frequency shifts corresponding to different radial acoustic modes in 1060-XP SMF show different sensitivities to temperature and salinity.Based on the new phenomenon that different radial acoustic modes have different frequency shift-temperature and frequency shift-salinity coefficients,we propose a novel method for simultaneously measuring temperature and salinity by measuring the frequency shift changes of two FBS scattering peaks.In a proof-of-concept experiment,the temperature and salinity measurement errors are 0.12℃and 0.29%,respectively.The proposed method for simultaneously measuring temperature and salinity has the potential applications such as ocean surveying,food manufacturing and pharmaceutical engineering. 展开更多
关键词 forward Brillouin scattering(FBS) optical fiber sensor salinity sensing temperature sensing
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基于神经网络的光纤温度估算方法的优化
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作者 李苏雅 董艳唯 +4 位作者 李琳 张弛 李楠 宁琦 陈永辉 《光通信研究》 北大核心 2025年第1期83-88,共6页
【目的】为了有效估算基于布里渊散射的分布式光纤传感中光纤的温度,文章将多层前馈人工神经网络(ANN)应用于温度的估算。【方法】文章在Matlab软件中编写了用于光纤温度计算的单斜坡法、基于伪Voigt模型的最小二乘拟合法和ANN程序,同... 【目的】为了有效估算基于布里渊散射的分布式光纤传感中光纤的温度,文章将多层前馈人工神经网络(ANN)应用于温度的估算。【方法】文章在Matlab软件中编写了用于光纤温度计算的单斜坡法、基于伪Voigt模型的最小二乘拟合法和ANN程序,同时仿真产生了不同信噪比(SNR)下的布里渊谱,采用以上3种算法计算了光纤温度,验证了ANN方法的有效性。在此基础上基于以上仿真产生的布里渊谱研究了ANN的关键参数,即隐层数量、隐层神经元数量和训练目标对训练速度、温度计算时间和准确性的影响规律。【结果】结果表明,ANN方法在SNR为22和37 dB时最大温度误差分别仅为1.18和0.63℃,且计算时间仅为最小二乘拟合法的1/1000左右。当隐层神经元数量不变时,随着隐层层数的增加,训练时间明显下降,计算时间线性增加,但其对温度估算的准确性几乎无影响;随着隐层神经元数量的增加,训练时间和计算时间均增加,隐层有21个神经元时,训练时间近似为1个神经元的67倍,但其对温度估算的准确性几乎无影响;训练目标(布里渊频移误差的平方)小于临界值(约为1 MHz 2)时,随着训练目标的增加,温度误差几乎不变,超过临界值后,随着训练目标的增加,温度误差增大。【结论】采用多层前馈ANN应用于基于布里渊散射的分布式光纤传感中的光纤温度估算时,建议选择单隐层且隐层神经元选择1个,训练目标选择1 MHz 2。 展开更多
关键词 分布式光纤传感 布里渊散射 布里渊频移 人工神经网络 温度 优化
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基于FBG传感器的带式输送机故障监测研究
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作者 方新秋 吴洋 +5 位作者 宋扬 陈宁宁 丰宇龙 冯豪天 贺德幸 乔富康 《煤炭科学技术》 北大核心 2025年第1期326-340,共15页
带式输送机的故障监测有助于预防安全事故、提高生产效率以及实现设备智能化运行。从带式输送机常见故障分析、综合保护系统组成、光纤型传感器阵列设计与分析、核心敏感元件设计与选材等方面,对基于FBG传感器的带式输送机故障监测进行... 带式输送机的故障监测有助于预防安全事故、提高生产效率以及实现设备智能化运行。从带式输送机常见故障分析、综合保护系统组成、光纤型传感器阵列设计与分析、核心敏感元件设计与选材等方面,对基于FBG传感器的带式输送机故障监测进行了深入研究。首先针对传统监测手段无法定量感知、实时性不足、数据融合能力薄弱等问题,提出了一种基于光纤光栅(FBG)的带式输送机综合保护系统,明确了光纤型传感器阵列的设计是系统搭建的重要前提。其次,在分析带式输送机常见故障形成原因和表现形式的基础上,以FBG-等强度悬臂梁为核心敏感元件设计了一系列故障监测传感器,组成了带式输送机综合保护系统的光纤型传感器阵列,实现了故障的实时定量监测。接着,通过理论分析和Ansys有限元仿真,对FBG-等强度悬臂梁的尺寸结构设计和材料选择进行了深入研究,在传感模型中分析了灵敏度和精度的影响因素,并据此确定了敏感元件的结构尺寸,优选了尼龙6作为制作材料。最后,通过试验对FBG-等强度悬臂梁的结构有效性、灵敏度和稳定性进行了验证。在灵敏度试验中,敏感元件表现出良好的线性响应特性,理论灵敏度S=52.9780Nnm,实际灵敏度S^(*)=38.1157 Nnm;在重复性试验中,平均重复性误差仅为1.002%,表现出良好的重复性和稳定性;温度敏感性试验和温度补偿试验则验证了光纤光栅在温度测量中的线性相关性,从而进一步揭示了温度补偿对提升传感灵敏度的必要性,即便在微小温度变化环境下,补偿机制仍能有效提高灵敏度0.6%。所设计的光纤型传感器阵列解决了现有带式输送机运行故障无法实时定量感知的问题,为实现设备智能化感知与控制提供了坚实的数据基础。研究成果不仅能有效降低带式输送机故障率,提高生产效率,更推动了煤矿行业向自动化、智能化方向的发展。 展开更多
关键词 光纤光栅 等强度悬臂梁 温度补偿 光纤型传感器阵列 带式输送机综合保护
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基于自发Raman散射分布式光纤测温系统设计 被引量:8
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作者 刘文 杨坤涛 许远忠 《光通信研究》 北大核心 2005年第4期54-56,共3页
光纤传感器是一种新发展起来的传感技术。文章介绍了基于自发Raman散射的分布式光纤测温系统的应用及其结构设计,并着重分析了在脉冲光作用下系统的测温原理,同时设计了一个新型的基于薄膜滤光片的用于Raman散射的波分复用(WDM)组件。
关键词 raman散射 分布式 光纤传感器
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隧道穿越下埋地管线分布式光纤变形及脱空反演分析
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作者 俞奎 章敏 +3 位作者 秦文权 孙静雯 张开翔 宋利埼 《岩土力学》 北大核心 2025年第3期894-904,共11页
针对隧道开挖引起地下管线变形和局部脱空,基于分布式光纤的感知应变,提出了一种非连续管线的变形反演方法。采用双层Winkler地基梁模型模拟管-土相互作用,考虑接头处弯矩-转角关系,基于差分法和共轭梁法,分别推导了应变已知条件下管线... 针对隧道开挖引起地下管线变形和局部脱空,基于分布式光纤的感知应变,提出了一种非连续管线的变形反演方法。采用双层Winkler地基梁模型模拟管-土相互作用,考虑接头处弯矩-转角关系,基于差分法和共轭梁法,分别推导了应变已知条件下管线位移、转角和土体沉降的反演表达式,对管-土脱空进行了识别。通过与有限元结果的对比,验证了反演理论的合理性和精度。结果表明,接头转动刚度的影响区间基本不受管线弯曲刚度的影响;脱空范围随着管线刚度和土体沉降的增大而增加,当上部土体地基系数较大时,管线主要发生上部脱空,反之,则易发生下部脱空;利用端点和最大应变处双重转角的边界条件,能显著提高反演的抗噪性能。 展开更多
关键词 分布式光纤 地下管线 隧道 双层Winkler地基 反演 界面脱空
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光纤FPI高温压力传感器的设计与仿真
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作者 田野 曹咏弘 吕晶 《微纳电子技术》 2025年第2期105-115,共11页
航空发动机的内部环境严苛,为保证发动机正常运行需要实时监测压气室、燃烧室等关键部位的动态压力信号和温度信号。基于法布里珀罗干涉原理,以蓝宝石作为材料,建立了传感器整体结构模型并级联光栅结构作为温度补偿,通过理论和仿真分析... 航空发动机的内部环境严苛,为保证发动机正常运行需要实时监测压气室、燃烧室等关键部位的动态压力信号和温度信号。基于法布里珀罗干涉原理,以蓝宝石作为材料,建立了传感器整体结构模型并级联光栅结构作为温度补偿,通过理论和仿真分析确定了传感器具体结构尺寸参数。利用有限元分析软件ANSYS对蓝宝石法布里珀罗干涉仪(FPI)光纤高温压力传感器模型进行了静态分析及温度/压力耦合分析,以模拟传感器在复合环境下的性能。传感器的压力灵敏度为2.216 2 nm/MPa,温度灵敏度为9.198 4 pm/℃,交叉灵敏度为0.017 1 MPa/℃,满量程精度为0.735%,在26~1 500℃范围内具有良好的热-机械性能,为今后蓝宝石高温压力传感器结构的优化与改进提供了一定的参考。 展开更多
关键词 光纤高温压力传感器 法布里珀罗干涉仪(FPI) 光栅 蓝宝石薄膜 微电子机械系统(MEMS)
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基于光纤测温系统的采空区温度变化规律及遗煤自燃监测
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作者 马斌 连建军 +3 位作者 王辰 刘统学 翟小伟 马腾 《陕西煤炭》 2025年第3期90-95,112,共7页
采空区遗煤自燃监测预警对煤矿安全生产至关重要,以王洼二矿21081综放工作面为工程背景,采用分布式光纤测温技术研究工作面推进过程中采空区温度分布规律,分析时空尺度上采空区温度演化特征,并根据温度监测结果指导现场遗煤自燃防控。... 采空区遗煤自燃监测预警对煤矿安全生产至关重要,以王洼二矿21081综放工作面为工程背景,采用分布式光纤测温技术研究工作面推进过程中采空区温度分布规律,分析时空尺度上采空区温度演化特征,并根据温度监测结果指导现场遗煤自燃防控。研究结果表明,工作面推进过程中采空区温度随推进距离呈现平稳-上升-下降阶段性分布特征,采空区进风侧温度峰值出现在埋深为55~100 m的区域内,最高温度为37.8℃;采空区回风侧温度峰值出现在埋深为30~60 m的区域内,最高温度为34.4℃。利用光纤测温技术指导了210801综放工作面日常防控,并成功解决了采空区内遗煤氧化异常的问题,将采空区内最高温度从47℃降低到36℃。研究成果为采空区遗煤自燃监测预警提供了理论依据与技术借鉴。 展开更多
关键词 煤自燃 分布式光纤测温 温度演化 监测预警
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Raman散射线型光纤感温火灾探测器的优化设计 被引量:3
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作者 严洪 姜明武 徐海峰 《消防科学与技术》 CAS 北大核心 2009年第11期834-837,共4页
分析了分布式光纤温度传感技术在火灾探测报警领域的应用特性和系统优化设计方案,介绍了光时域反射技术以及光纤中的Raman散射测温原理。设计开发了AT810线型光纤感温火灾探测器基于专用算法处理芯片ASIC和PowerPC处理器的实时数据采集... 分析了分布式光纤温度传感技术在火灾探测报警领域的应用特性和系统优化设计方案,介绍了光时域反射技术以及光纤中的Raman散射测温原理。设计开发了AT810线型光纤感温火灾探测器基于专用算法处理芯片ASIC和PowerPC处理器的实时数据采集处理系统,采用嵌入式硬件系统和基于嵌入式linux的软件平台优化系统硬件和软件性能,并对感温光缆进行优化设计,提高了系统的稳定性及可靠性。 展开更多
关键词 光纤温度传感器 光时域反射 raman散射 火灾探测
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光纤光栅温度应力传感教学实验装置
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作者 张瑾 刘鹏 +2 位作者 肖彤 蓝靖棋 凌振宝 《吉林大学学报(信息科学版)》 CAS 2024年第1期131-136,共6页
针对目前市场上可直接用于光纤光栅传感实验教学的装置较少,前沿科研技术和本科实验教学相脱节现状,设计了基于光纤光栅的温度应力传感教学装置。该装置包括光纤激光器、光谱仪和上位机控制软件3部分。光纤激光器实现了1 550 nm左右的... 针对目前市场上可直接用于光纤光栅传感实验教学的装置较少,前沿科研技术和本科实验教学相脱节现状,设计了基于光纤光栅的温度应力传感教学装置。该装置包括光纤激光器、光谱仪和上位机控制软件3部分。光纤激光器实现了1 550 nm左右的激光输出,利用光谱仪测量光纤光栅中心波长的改变,并采集数据输入计算机,上位机控制软件用于图形显示和数据存储等。该实验装置操作简单、组装灵活、重复性和稳定性好,可用于本科实验教学。将前沿科学技术引入本科实验教学,促进了科学研究与本科实验教学相融合,实现了科研教学水平的同步提高。 展开更多
关键词 光纤光学 温度 应力 光栅 传感器
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