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油罐计量中的光纤传感检测系统 被引量:4
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作者 郑平 吴明 张国忠 《石油化工设备》 CAS 2010年第2期70-73,共4页
介绍了利用光纤传感技术研制的一种新型油品储罐液位和温度测量系统。该系统通过力的平衡原理测量液位,利用光纤特性随温度变化的原理测量温度,采用光纤传感器探测和传输信号,能够对油罐群进行多点、多参量(液位、温度、油水界面等)、... 介绍了利用光纤传感技术研制的一种新型油品储罐液位和温度测量系统。该系统通过力的平衡原理测量液位,利用光纤特性随温度变化的原理测量温度,采用光纤传感器探测和传输信号,能够对油罐群进行多点、多参量(液位、温度、油水界面等)、在线、高精度、数字化和远距离传输测量。现场应用表明,该系统的各项性能指标符合生产要求,运行稳定,性能可靠。该系统的应用改变了油品储罐液位和温度测量靠人工读数工作效率低、误差大,而且无法实现自动化控制和管理的状况。 展开更多
关键词 油罐 液位 温度 光纤传感检测系统 测量
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基于FPGA的光纤传感气体检测系统的实现 被引量:4
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作者 季兴安 熊凌 +1 位作者 李家荣 王兴 《光通信技术》 CSCD 北大核心 2011年第10期41-43,共3页
工矿行业环境中有害气体的检测直接关系到工作人员的生命安全,传统的光纤传感气体检测系统,硬件结构复杂、抗电磁干扰能力弱,检测的气体浓度不准确。项目结合FPGA技术,利用硬件编程语言VerilogHDL设计硬件电路,替代了传统的DDS、倍频、... 工矿行业环境中有害气体的检测直接关系到工作人员的生命安全,传统的光纤传感气体检测系统,硬件结构复杂、抗电磁干扰能力弱,检测的气体浓度不准确。项目结合FPGA技术,利用硬件编程语言VerilogHDL设计硬件电路,替代了传统的DDS、倍频、移相等复杂硬件结构。在抗干扰性和精度上都有了很大提高,优化了传统的检测系统。 展开更多
关键词 光纤传感检测系统 FPGA VERILOGHDL DDS
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光纤传感振动检测系统及其实验研究 被引量:6
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作者 朱启荣 方如华 +2 位作者 曾伟明 曹正元 张林春 《力学季刊》 CSCD 北大核心 2004年第1期46-50,共5页
实际工程结构中的振动检测是十分重要的,也是十分复杂的,常用的结构振动检测传感器易受工程现场恶劣环境的影响,而光纤传感器具有小巧、抗电磁干扰、灵敏度高、适合长期监测等优点。本文建立了基于马赫—曾德(Mech-Zehnder)干涉原理的... 实际工程结构中的振动检测是十分重要的,也是十分复杂的,常用的结构振动检测传感器易受工程现场恶劣环境的影响,而光纤传感器具有小巧、抗电磁干扰、灵敏度高、适合长期监测等优点。本文建立了基于马赫—曾德(Mech-Zehnder)干涉原理的光纤传感振动检测系统,研制了运用先进的数字信号处理技术采集和处理数据的专用软件,并在典型结构件——钢制悬臂梁结构上进行了外加信号作用下的强迫振动检测和冲击载荷作用下的自由衰减振动检测,测量了该结构件的频率及振幅,其结果与同时进行的成熟的电测结果相近,说明光纤传感器用于结构件的振动测量是可靠的。本文为光纤传感器应用于实际工程的振动检测提供了新的技术装置,具有工程应用前景。 展开更多
关键词 光纤 数字信号处理 马赫-曾德干涉原理 光纤振动检测系统 结构振动
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Optically Powered Pressure Sensor with Optical Fiber Link
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作者 LIU Zhiyan WANG Yutian(Yanshan University. Qinhuangdao 066004. CHN) 《Semiconductor Photonics and Technology》 CAS 1996年第1期18-24,共7页
An optically powered sensor for measuring pressure which is linked by optical fiber is developed in new scheme. Its pulse position modulation (PPM) optical signal and optical supply power for electronics in probe are... An optically powered sensor for measuring pressure which is linked by optical fiber is developed in new scheme. Its pulse position modulation (PPM) optical signal and optical supply power for electronics in probe are transmitted via a single optical fiber. The optical power is carried by a 1 300 nm laser diode (LD) and the sensing data are carried by a 850 nm LED. The remote probe uses all CMOS chips and particular modulations (PPM and PWM). Its electrical consumption including signal manipulation and LED driven current from optically converted is less than 100 μW. The laser diode supplies 5 mW optical power into the fiber. A photodetector converts sufficiently this power into electrical power to drive the whole probe operation. The optically powered distance gets up to 500 m. The novel sensor combines optical fiber and electronics technology into a system. Because of using the principle of ratio measurement between measured and reference signals, as well as light feedback,the system is available with high reliable, outstanding accuracy and repeatability. 展开更多
关键词 Pressure Sensors Signal Detection Optical Fiber Measurement System
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Fiber Bragg Grating (FBG) Sensors Used in Coal Mines 被引量:4
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作者 Jinyu WANG Tongyu LIU +4 位作者 Guangdong SONG Hongjing XIE Lianqing LI Xiaolin DENG Zhijie GONG 《Photonic Sensors》 SCIE EI CAS 2014年第2期120-124,共5页
The fiber Bragg grating (FBG) strain sensors were used for on-line monitoring of the stress variation of the lined wall in the gateway retained along the goaf of No. 3203 coal mining face in Dongtan Mine. The result... The fiber Bragg grating (FBG) strain sensors were used for on-line monitoring of the stress variation of the lined wall in the gateway retained along the goaf of No. 3203 coal mining face in Dongtan Mine. The results showed that the FBG strain sensor with the wide measuring range could measure the stress variation accurately during the support process of the gateway retained along the goaf and could provide the basis to further optimize the support structure and to determine the support plan of the gateway retained along the goaf. The FBG micro-seismic sensors were used in Xinglong Mine to detect the micro-seismic signal. The signals were well received and analyzed to determine the location and energy level of the source of the micro-seismic event warning. The FBG sensors and detecting system show a significant potential for micro-seismic detection and geological disasters detection. 展开更多
关键词 FB stress sensor acceleration sensor stress monitoring micro-seismic activity seismic signal
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