Study on water loss settlement law of loose aquifer based on distributed optical fiber [PDF]
, 2023 Indirect water loss caused by disturbance from coal mining can cause compression of loose layers and surface subsidence, which poses a threat to coal mine safety.
Kun ZHANG +4 more
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Multi-parameter fine sensing method of deformation and failure process of coal seam mining floor [PDF]
, 2023 Sensing the floor deformation and damage process by testing parameters during coal seam mining is an effective way to secure the geology of the quarry.
Chang LIU, Duoxi YAO
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Research on deformation monitoring of surrounding rock based on weak fiber grating sensing technology [PDF]
, 2023 The prominent contradiction between high ground stress and low strength of surrounding rock in deep strata of coal mine leads to large deformation and instability disaster after roadway excavation.
Sheng WANG +3 more
core +1 more source
Review and prospect of coal rock hydraulic fracturing physical experimental research [PDF]
, 2022 Physical simulation of hydraulic fracturing is an approximate representation of fracture evolution and its dynamic process, which represents an important direction of fracture evolution research.
Le LIU +8 more
core +1 more source
Design of pre-warning system for oil pipeline based on Beidou short message [PDF]
, 2017 为解决移动通信网络盲区长距离输油管道盗漏预警的问题,利用北斗FB3511模块的短报文卫星通信功能,设计了集单片机、DSP、北斗模块于一体的低功耗长距离输油管道预警系统。根据输油管道预警系统工程应用的要求与通信网络盲区无法使用移动网络链路进行数据传输的特点,提出了实时预警、地理位置定位、分布式拓扑结构及低功耗的功能要求,据此完成了整个系统的方案设计。预警系统硬件平台由信号采集与调理模块、单片机模块、DSP模块、北斗短报文模块及供电模块组成,详细介绍了整个系统的工作流程。现场应用试验结果表明 ...
孙介涛 +5 more
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Gaoya dianqi, 2023 全封闭组合电器设备作为一种当今现场广为使用的电气设备，常因导体接触不良等故障，导致其温度不断上升，从而引发事故发生。文中对GIS中盆式绝缘子导体热点分布情况进行分析，将荧光光纤温度传感器植入盆式绝缘子内部，直接测量导体温度。并对内置光纤传感系统的电场分布和加入光纤系统后的电场分布进行了分析并通过实验验证，明确使用光纤传感系统的安全性。并通过GIS温升试验对比光纤测温与内置热电偶测温，说明光纤测温的有效性。
马金财, 刘刚, 何龙, 赵洪波
doaj
Guangtongxin yanjiu, 2021 针对输电线路等场景的超长距离监测应用问题，文章在分布式光纤相位敏感光时域反射仪的基础上，采用拉曼放大和外差检测的方式，设计了一种光电信号分段探测和采集的光纤传感系统。该系统依据光纤长度将光纤分为两段进行信号采集和处理，针对不同强度信号适配相应的信号处理和采集参数，解决了超长距离监测系统的动态范围不足和信噪比差的问题。经试验和分析，最终实现了超过124 km的单端超长距离分布式光纤监测系统，系统末端信噪比>10.5 dB。
金燊 +4 more
doaj
Optical-electrical-acoustic wave multiparameter response characteristics of typical rocks in coal-bearing strata throughout the loading process [PDF]
Objective The deformations and rupture of rocks under loading will cause potential changes in parameters. Dynamic parameter capture assists in characterizing the generation, propagation, and closure processes of fractures, serving as a significant method
Chang LIU, Pingsong ZHANG
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Distributed Optical Fiber Acoustic Wave Sensing and Its Progress [PDF]
Distributed optical fiber sensing technology uses optical fiber as the sensing transmission medium to obtain sound wave amplitude and phase along the optical fiber and process the corresponding information.
WANG Longsheng +3 more
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High spectral efficiency SSB-PAM-DD scheme with high linewidth tolerance [PDF]
, 2022 For low-cost and high chromatic dispersion (CD) robustness single sideband (SSB) with direct detection (DD), three schemes of SSB with pulse amplitude modulation (PAM) were investigated.Among that, the highest spectral efficiency was achieved by the ...
Dongxu LU +5 more
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