Design of motion control of dam safety inspection underwater vehicle

Plenty of dams in China are in danger while there are few effective methods for underwater dam inspections of hidden problems such as conduits,cracks and inanitions.The dam safety inspection remotely operated vehicle(DSIROV) is designed to solve these problems which can be equipped with many advanced sensors such as acoustical,optical and electrical sensors for underwater dam inspection.A least-square parameter estimation method is utilized to estimate the hydrodynamic coefficients of DSIROV,and a four degree-of-freedom(DOF) simulation system is constructed.The architecture of DSIROV's motion control system is introduced,which includes hardware and software structures.The hardware based on PC104 BUS,uses AMD ELAN520 as the controller's embedded CPU and all control modules work in VxWorks real-time operating system.Information flow of the motion system of DSIROV,automatic control of dam scanning and dead-reckoning algorithm for navigation are also discussed.The reliability of DSIROV's control system can be verified and the control system can fulfill the motion control mission because embankment checking can be demonstrated by the lake trials.

Analysis of Safety Assessment and Testing of Heavy Traffic Vehicles on Old Bridges Without Data

This article presents a real-life project that aimed to evaluate the safety of traffic vehicles on old bridges without any prior data.The project involved various safety inspections,including conventional,static,and dynamic load inspections and safety assessments.After conducting these tests,it was concluded that the structure of the old bridge is relatively safe,with only a few bumps.The bridge could function normally following appropriate treatment.The analysis provides valuable insights into the assessment of the quality and safety of such bridges to ensure the safe driving of heavy vehicles.

Safety Distance Determination for 500 kV AC Transmission Line’s Helicopter Inspection

As an efficient and advanced line inspection method, helicopter line patrol is gradually more and more used in transmission lines inspection, promoting the elaborate operation of transmission lines and reducing the management cost. However, as a 'floating-potential conductor' near to a high-voltage transmission line, the helicopter would be at a high electric field region;and bring security risk to equipment and operating personnel. In this paper, the electric field strength near the cabin at locations of different distance from transmission lines is investigated by calculation, and the field in the helicopter cabin is also calculated with finite element method (FEM). The result indicates that the potential difference becomes higher with the decrease of the distance between the helicopter and transmission line. Considering the discharge energy and the guarantee of the persons’ safety, the safety distance is determined as d≥15 m.

Safety Indications of Navigation Audit for Tankers to Develop a Bridge Inspection Method

A significant amount of world trade has been carried out by maritime transportation. In 2016, world maritime trade volume increased by 2% and reached 10.3 billion tons, 55,057 global ton-miles. There has been a significant increase in quantity and tonnage of tankers, with the requirement for well qualified and experienced personnel in the maritime industry. Therefore, employment has become a serious problem. Major Oil Companies (MOCs), port states, classification societies, and flag states have increased the number of inspections on tankers due to safety concerns. Tanker inspections are becoming more difficult and inefficient due to intensive cargo operations. Inefficient, subjective or substandard inspections/evaluations are usually leading to incorrect decisions, and causing an unfair market. In addition, corrective actions cannot be carried out properly, and decision making authorities cannot give the best decisions about vessels and their operator companies due to lack of scientific methods. In this study, details are identified such as finding the root causes, identifying the risks, understanding the possible consequences, and determining the working areas during the ship crews’, operators’, auditors’ and charterers’ working and ship selection periods. Pairwise comparisons were carried out by means of surveys on ship masters (captains), chief officers, deck officers, and superintendents. Five criteria—Crew, Equipment, Company, Structure, and ISM (International Safety Management) were weighted using Analytical Hierarchy Process (AHP). Finally, Bridge Safety Support System (BSSS) was developed according to criteria weights. In this way, best choices can be offered to ship charterers about which ship is better for a company’s interests. And, carrying out bridge inspections and corrective actions will be more reliable and effective for maritime transportation. Statistical data and vessel improvements will be obtained in BSSS. As a result, fair market conditions will be available in maritime industry with the help of this study.

Safety Requirements And Inspections Methods For Insulating Components Used In Electrical Accessories

This paper covers the safely requirements and inspection methods for insulating components used in electrical accessories by an analyzing the properties of the insulating components used in electrical accessories based on the standard of IEC 60884.

Research on Operation Safety of Urban Rail Transit Based on Automatic Ticket Checking(AFC)System

At present,after the actual inspection of the rail transit automatic ticket checking system,some security vulnerabilities have appeared,and there are also some defects in information security.For example,the database and virus protection need to be analyzed and upgraded in order to cope with the increasing number of information security risks.This article analyzes the security problems in the AFC system,and puts forward related suggestions and solutions,hoping to provide some reference for technical developers.

Application of Six Sigma Theory in Process Reengineering of Food Safety Monitoring Laboratory

Based on the survey of customer satisfaction,the authors found existing problems in inspection process of the food safety monitoring laboratory A( including the whole process from receiving samples to issue of inspection report),and determined solutions using flow chart supplied by sig sigma( 6σ) theory. Through comparing overall effect before and after improvement of the inspection process,it is proved that 6σmanagement theory is a new effective management tool for eliminating errors,simplifying process,and meeting requirements of customers to the maximal extent.

As Could We Assure Safety in Large-Scale Manufacturing of Nanoparticles for the Biomedical Use

Nanoparticles provide great advantages but also great risks. Risks associating with nanoparticles are the problem of all technologies, but they increase in many times in nanotechnologies. Adequate methods of outgoing production inspection are necessary to solve the problem of risks, and the inspection must be based on the safety standard. Existing safety standard results from a principle of “maximum permissible concentrations or MPC”. This principle is not applicable to nanoparticles, but a safety standard reflecting risks inherent in nanoparticles doesn’t exist. Essence of the risks is illustrated by the example from pharmacology, since its safety assurance is conceptually based on MPC and it has already come against this problem. Possible formula of safety standard for nanoparticles is reflected in many publications, but conventional inspection methods cannot provide its realization, and this gap is an obstacle to assumption of similar formulas. Therefore the development of nanoparticle industry as a whole (also development of the pharmacology in particular) is impossible without the creation of an adequate inspection method. There are suggested new inspection methods founded on the new physical principle and satisfying to the adequate safety standard for nanoparticles. These methods demonstrate that creation of the adequate safety standard and the outgoing production inspection in a large-scale manufacturing of nanoparticles are the solvable problems. However there is a great distance between the physical principle and its hardware realization, and a transition from the principle to the hardware demands great intellectual and material costs. Therefore it is desirable to call attention of the public at large to the necessity of urgent expansions of investigations associated with outgoing inspections in nanoparticles technologies. It is necessary also to attract attention, first, of representatives of state structures controlling approvals of the adequate safety standard to this problem, since it is impossible to compel producers providing the safety without the similar standard, and, second, of leaders of pharmacological industry, since their industry already entered into the nanotechnology era, and they have taken an interest in a forthcoming development of inspection methods.

Research on the Inspection Method of Chimney Appearance and Masonry Material Performance

As a high-rise structure,the safety of chimneys has always been a public concern.In this paper,the damage condition,tilting,and the strength of load-bearing materials of the chimney were inspected,and the inspection conclusions and maintenance suggestions were given based on the inspection results.The inspection method can provide relevant reference for the inspection of similar structures.

高等学校实验室安全现场检查三段七步流程的设计与应用

为实现高等学校实验室安全现场检查工作的常态化、规范化、精细化和有效化,全面规划任务,合理分配时间,提高现场检查工作的质量和效率,该文依据相关规范要求设计准则,通过程序优化与流程设计,将现场检查工作划分为入校准备、现场检查和反馈整改三个相互联系的阶段,进一步将现场检查划分为预备会议、见面会议、查阅资料、查看现场、师生访谈、重点交流和会议反馈的七个步骤,构建了高校实验室安全现场检查的三段七步工作流程。经实践应用,三段七步流程保证了现场检查工作推进的合理有序,检查内容涵盖了实验室安全检查的全部要素和指标点,对现场检查工作具有指引导向功用。

食品安全检验实验室管理及质量控制的强化措施探究

食品安全检验实验室的主要工作是对食品进行检验,依据食品检验数据对食品安全水平进行精准判定。食品安全实验室管理和质量控制对最终检测结果有直接影响,因此需要确保食品安全检验实验室的管理有效性和检验质量的合理控制。基于此,本文针对食品安全检验实验室管理和质量控制的相关措施进行探究,以期强化实验室管理质量和食品安全检测质量,为食品安全提供可靠保障和支持。

Application and Significance of Sample Pretreatment Technology in Food Physical and Chemical Inspection

The society promotes the continuous development of science and technology,and people’s living materials have also gradually improved.At the same time,more attention is paid to the safety performance problems such as food inspection and inspection,which is related to the people’s food first,especially the safety and quality problems of food will cause safety risks to the body.Combined with the sampling inspection process of relevant food testing departments,we attach great importance to the sampling inspection and detection of food,effectively reduce the risk of food safety,avoid the risk of social life caused by the food safety problems and the credibility of essential quality of food,explore and research from a scientific point of view.The quality control process of physical and chemical inspection and other related technology and quality control process lay the foundation of food safety guarantee for people’s living and working in peace and contentment.

基于SPOC“食品分析与检验”课程群的设计与实践——以食品质量与安全专业为例

在工程教育专业认证和着力推动信息化教学改革的背景下,以食品质量与安全专业为例,构建SPOC模式下的“食品分析与检验”课程群,进行以学生为中心,以产出为导向,以持续改进为驱动力的教学理念,充分考虑学生自身需求,实现理论与实践的相互转换,满足企业对食品质量与安全专业的人才所需,结合改革过程出现的问题和教学效果反馈,为“食品分析与检验”课程群建设提供参考。

高校实验室安全巡检管理系统研究

以某学院在实验室安全管理过程中遇到的问题及解决方案为例,分析在实验室安全巡检过程中采用信息技术手段,对实验室安全巡检、报告、报修、统计分析等工作过程进行信息化改造的情况。开发并使用实验室安全巡检管理系统,规范实验室安全巡检制度,降低实验室安全事故发生概率,提高实验室相关数据的收集和统计分析能力。

湿法锌冶炼过程中对余热锅炉安全的探索与实践

湿法锌冶炼过程中余热锅炉的安全至关重要。宝徽集团主要针对余热锅炉的爆管现象和积灰问题,对余热锅炉安全进行了改造实践。改造后,余热锅炉进气口烟气的流速明显降低,有效降低了爆管风险,余热锅炉的安全性大大提升。清灰方式升级为弹簧振打、爆破共同作用后,清灰效果显著增加,管道积灰现象改善。

空地一体遥感技术在轨道交通安全保护区巡查中的应用

随着城市轨道交通建设的不断发展,轨道交通沿线安全保护区巡查工作的范围越来越大,内容越来越多,区域内的情况越来越复杂。针对存在的问题,本文构建了一套空地一体的遥感综合监测体系,在巡查工作中引入航空摄影测量、低空无人机监测、车载全景扫描、定点实时监控等多种遥感监测技术及DSM差分计算、深度学习智能识别等多种数据处理技术,并以上海为例开展应用实践。结果表明,本文方法具有可行性,对建立全覆盖、高频次、智能化的巡查模式有参考借鉴价值。

食品检验检测中样品管理和控制存在的问题及对策

规范食品检验检测流程,加强样品管理和控制,不仅能够保证检测结果的准确性和可靠性,还有助于提高食品安全监管的效率和水平。食品安全问题一直是社会关注的焦点,食品检验检测作为食品安全监管的关键技术手段,其结果的准确性和可靠性至关重要。本文在分析样品选择、样品保存、检测设备及方法、样品污染和样品追溯性等问题的基础上,提出针对性的解决对策,旨在提高检验检测结果可信度,守护民众饮食安全。

超(超)临界电站锅炉外部检验分析

超(超)临界电站锅炉的使用和运行管理水平决定了机组的安全性,及时通过外部检验发现问题并进行处理是行之有效的方法。本文归纳了外部检验具体项目,在收集汇总了大量超(超)临界电站锅炉检验结果的基础上,分类统计了各检验项目发生问题的概率,并对主要问题可能引起的安全风险进行了分析。检验人员在确定检验方案时,可参考该统计结果,能够提高外部检验工作的质量及时效性,为保障锅炉的安全稳定运行发挥作用。