采场围岩变形与破坏监测技术研究进展及展望

深部煤炭资源开发面临更多复杂、多变、高难的开采地质问题,采场围岩形态结构是矿井安全生产的重要评价指标之一,开展采场围岩变形与破坏测是判别矿井隐蔽致灾地质问题的重要技术保障。在煤炭工业快速发展的近20余年时间里,围岩体形变监测技术取得了长足的进步,基于矿山采场围岩体变形与破坏的影响因素,按照监测形式对监测技术进行了划分,归纳了当前用于矿山采场围岩变形与破坏监测的钻孔测试技术、地球物理探测技术、光纤监测技术及其他测量技术及其特点,结合煤层顶底板、巷道两帮空间监测的工程应用实例,介绍了不同监测技术的主要进展、优缺点以及适用性,讨论了探测技术的革新趋势和未来矿井安全生产中采场围岩变形与破坏监测技术的发展方向。同时,也认识到现有监测技术虽然已取得显著的监测效果,但是仍不能够满足矿井现代化、智能化生产需要。对于监测技术的进步而言,既需要技术装备的不断优化,更是要跨学科、跨专业科学技术理论的完善与更新。在当前地学大数据、云计算、人工智能新一轮科技创新基础上,今后采场围岩变形与破坏的监测技术必然向多元化、多参数、智慧化、全程监控的方向发展,监测方式也将不断地向可视化、动态化的监测预警模式过渡,融合监测技术发挥多参数的作用将越来越重要。     

基于小波分析的谐波在线监测系统

针对传统谐波在线监测系统存的结果不准确，无法描述谐波动态变化特点，设计了基于小波分析的谐波在线监测系统。首先设计了谐波在线监测系统的硬件模块，然后谐波在线监测系统的软件模块，依据小波变换分析谐波信号特征，得到的谐波变化率，从而谐波在线监测系统的监测结果，最后采用具体实验进行了谐波在线监测系统性能的仿真实验，由实验结果可知，该系统的谐波监测精度高，可以有效检测各种谐波分量，保证电力系统稳定运行。     

井下供电监控及防越级跳闸系统运用分析

以井下供电监控及防越级跳闸运用为对象开展探究。在分析矿井供电系统运行中现存主要问题的基础上,对供电监控与防越级跳闸系统整体应用的积极意义进行了分析和总结,希望能够让更多矿井技术人员了解供电监控及防越级跳闸系统的优越性,为其在矿井中的广泛推广普及提供便利,为煤矿行业更加高效地发展提供帮助。     

宽频带梯形叉指式换能器优化设计及应用

由声表面波（Surface Acoustic Wave）器件发展而来的叉指换能器（Interdigital Transducer，IDT）由于其工作频率可以设计、频带宽可调、损耗低等特点逐步应用于结构健康监测（Structural Health Monitoring，SHM）系统中，因此在智能材料与结构中有着广泛的应用前景。本文针对现有矩形IDT带宽窄的不足，研究宽频带梯形叉指换能器（Trapezoidal Interdigital Transducer，TIDT）。采用有限元分析方法对TIDT的尺寸进行结构优化设计，并对设计的TIDT进行性能测试，通过实验研究了TIDT用于结构损伤检测的初步应用。实验结果表明，TIDT在实际应用中进一步提高了损伤识别精度，具有广泛的应用前景。     

Fast response and broadband self-powered photodetectors based on CZTS/SiNW core-shell heterojunctions for health monitoring

In this work, fast response and broadband self-powered photodetectors based on heterojunctions of vertical smooth silicon nanowires (SiNWs) were proposed, which were achieved through spin-coating p-CZTS on top of n-SiNWs adopting a simple two-step method. First, CZTS was uniformly and tightly attached to the sidewalls of SiNWs in the form of nanoparticles. The prepared CZTS/SiNWs core-shell heterojunctions exhibited typical rectification characteristics in dark and excellent light response characteristics in light illumination. Our device could perform self-driven detection under the UV-VIS-NIR light irradiation without an external energy supply. The responsivity and specific detectivity were estimated to be 14 mAW^-1 and 1.5 × 10¹¹ Jones, which can be improved to 0.35 AW^-1 and 1.2 × 10¹³ Jones at ?1.5 V bias. In addition, the present device also possesses distinct advantages of a large I_light/I_dark ratio exceeding 4.25 × 10⁴, fast response rate with rise/fall times of 1.4/14.2 μs, and outstanding environmental stability. Finally, a heart rate health monitoring application by CZTS/SiNWs detector was proposed. All these results may pave a way for the real application of the self-driven detector in the field of health monitoring in the future.     

Contagious agalactia monitoring in caprine herds through regular bulk tank milk sampling

Surveillance and control of Mycoplasma spp. responsible for contagious agalactia (CA) in caprine herds are important challenges in countries with a large small-ruminant dairy industry. In the absence of any clinical signs, being able to determine the potential circulation of mycoplasmas within a herd could help to prevent biosecurity issues during animal exchanges between farms and improve health management practices. The objective of this study was to determine whether regular sampling of bulk tank milk was suitable for such surveillance. Twenty farms were sampled once a month for 2 yr and CA-responsible mycoplasmas were detected by real-time PCR on DNA extracted from milk, using 3 different DNA extraction methods. The pattern of mycoplasma excretion in bulk tank milk was assessed over time and several herd characteristics were recorded together with any event occurring within the herds. In general, the results obtained with the different detection methods were comparable and mainly agreed with the culture results. Several patterns of excretion were observed but were not related to herd characteristics (size, breed, and so on). Recurrence of the same (sub)species and same pulsed-field gel electrophoresis subtype during the 2-yr period is indicative of the considerable persistence of mycoplasmas. This persistence was associated with intermittent excretion. In conclusion, bulk tank milk sampling could be valuable for controlling CA in caprine herds provided it is repeated several times, yet to be defined, per year and analyzed using an appropriate methodology and the right cut-off for interpretation.     

惠州水文监测综合管理平台设计与实现

针对目前部分水文要素监测工作中还存在大量人工记载、计算、录入，成果出错率较高，时效性低， 监测业务融合度不够和内部管理难度大等方面的问题，深度融合互联网技术和水文监测业务，开展“互联网 + 水文监测”研究，设计并开发分局水文监测综合管理平台是十分必要的。深入分析水文监测各项业务流程，打造水文监测在线业务流、数据流和管理流，结合程序开发语言和互联网技术，完成惠州水文监测综合管理平台设计。平台在 2020 年 6 月东江流域洪水中进行实际应用，结果表明：平台实现水文监测要素人工作业无纸化、 自动化、智能化，进一步提高水文监测工作效率和信息化水平，具有很好的推广应用前景。     

The digital twin of the quality monitoring and control in the series solar cell production line

With the development of intelligent manufacturing (IM), the Digital twin (DT) has become an important means to the evolution mechanism of the process. Many researchers pay attention on the realization of DT in different industries. Based on the DT and Digital Twin Shop Floor (DTS) model, a novel, high throughput metrology method is proposed in the process quality monitoring and control of the Series Solar Cell Production Line (SSCPL) for detailed performance analysis. The variance of individual loss parameters and their impact on quality performance are quantified and mapped into the virtual space. The nature of their distributions and correlations provide great insights about quality loss mechanisms in process monitoring, helping to prioritize efforts for optimizing the control of the SSCPL in the physical space. Additionally, the parameters can be tied back to the physical space, allowing the data to be used directly for the control in the manufacturing. The data-loop of “Autonomous perception of process parameters - Dynamic behaver mapping - Online monitoring - Online data analysis - Parameters configuration & control” can be obtained in the model. This paper provides an application paradigm for DT and IM.