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Automatic Detection and Characterization of Weld Defects Using CNN Algorithm in Machine Learning 基于机器学习CNN算法的焊缝缺陷自动检测与表征
Pub Date : 2021-05-15 DOI: 10.51983/arme-2021.10.1.2937
R. Krishnan, T. Abhishek, Akhil Vinod, Allen George, C. Harikrishnan
Conventional radiographic technique uses visual inspection of scanned output for defect detection. This makes the inline testing of products time consuming and hectic. Convolutional Neural Network (CNN) algorithm in machine learning can be used for the automation of defect detection in radiography thereby reducing human intervention and associated delays. By the use of robotics the welding parameters can be adjusted and the issue of welding defects can be resolved. By combining the two, the defect detection process can be modified into a digital manufacturing process. A dataset created from radiography test data is used for training the algorithm and for writing a program to train this dataset which can be used for defect detection and its  characterization.
传统的射线照相技术使用视觉检查扫描输出来检测缺陷。这使得产品的内联测试既耗时又忙乱。机器学习中的卷积神经网络(CNN)算法可用于射线照相缺陷检测的自动化,从而减少人为干预和相关延迟。利用机器人技术可以调整焊接参数,解决焊接缺陷问题。通过两者的结合,可以将缺陷检测过程修改为数字化制造过程。从射线照相测试数据创建的数据集用于训练算法和编写程序来训练该数据集,该数据集可用于缺陷检测及其表征。
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引用次数: 0
Hydrogen Based Compounds as Energetic Catalysts for Liquid Rocket Engines: Implications and Applications 氢基化合物作为液体火箭发动机的高能催化剂:意义和应用
Pub Date : 2021-05-15 DOI: 10.51983/arme-2021.10.1.2868
Triparna Ray, V. Malhotra
In the current scenario of space propulsion, liquid propellants have significantly proved useful in the upper stage rocket engines. Over the past couple decades, the world had inclined positively towards cryogenic fuel(s) viz., liquid oxygen and liquid hydrogen due to their high specific impulse. A higher specific impulse implies lower duration to achieve design cruise velocity for a given rocket initial and instantaneous mass. Liquid hydrogen and liquid oxygen as fuel and oxidizer can generate one of the highest enthalpy release in combustion, producing a specific impulse of up to 450 seconds at an effective exhaust velocity of 4.4 kilometres per second. Whereas, selected disadvantages are encountered in the form of storage and production. This indicates overdependence on cryogenic propellants and has necessitated the active research effort for better alternatives. As an interesting alternative, the combination of Dinitrogen Tetroxide (N2O4) and Monomethyl Hydrazine (MMH) have been used for many space applications owing to an extreme storage stability and hypergolic nature. Present study aims to express the effect of hydrogen-based compounds on the rocket performance. Four distinctive compounds from two groups of hydrogen-based compounds are tested with the varying oxidizer and fuel proportions to obtain a new, cost-effective and user-friendly composition that can be prepared at room temperature. The investigation attempt and explains the effect of hydrogen based energetic propellants using N2O4 and MMH as the base composition for upper stage performance. The work is motivated by the need of efficient space operations with attractive propulsive alternatives to minimize over-dependence on cryogenics, which will ultimately result in cost effectiveness. Various energetic materials were tested with the base composition by using standard NASA-CEA complex chemical equilibrium model. The performance was evaluated in terms of variation in specific impulse and characteristic velocity both of which are significant parameters. To, validate the practical utility, the role of chamber pressure, supersonic area ratio and optimal Oxidizer to fuel ratio (O/F) was determined. The work led to two interesting findings, a composition of beryllium hydride with base composition for high performance of rockets and the negative impact of hydrogen on liquid propellants.
在目前的空间推进方案中,液体推进剂已被证明在上层火箭发动机中非常有用。在过去的几十年里,世界积极地倾向于低温燃料,即液氧和液氢,因为它们的高比冲。对于给定的火箭初始质量和瞬时质量,较高的比冲意味着较短的达到设计巡航速度所需的时间。作为燃料和氧化剂的液氢和液氧可以在燃烧中产生最高的焓释放之一,以每秒4.4公里的有效排气速度产生长达450秒的比冲。然而,在储存和生产方面遇到了选择的缺点。这表明对低温推进剂的过度依赖,需要积极的研究工作来寻找更好的替代品。作为一种有趣的替代方案,四氧化二氮(N2O4)和一甲基肼(MMH)的组合由于其极端的储存稳定性和自燃性质已被用于许多空间应用。本研究旨在表达氢基化合物对火箭性能的影响。用不同的氧化剂和燃料比例对两组氢基化合物中的四种不同的化合物进行了测试,以获得一种新的、具有成本效益的、用户友好的组合物,可以在室温下制备。本研究尝试并解释了以N2O4和MMH为基料组成的氢基高能推进剂对上级性能的影响。这项工作的动机是需要高效的空间操作和有吸引力的推进替代方案,以最大限度地减少对低温的过度依赖,这最终将导致成本效益。采用NASA-CEA标准复配化学平衡模型对各种含能材料进行了碱组成测试。用比冲和特性速度的变化来评价性能,这两个参数都是重要的参数。为了验证其实用性,确定了腔室压力、超声速面积比和最佳氧化燃料比(O/F)的作用。这项工作导致了两个有趣的发现,氢化铍与基础成分的组合物对火箭的高性能和氢对液体推进剂的负面影响。
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引用次数: 0
Heat Transfer and Fluid Flow in Double Pipe Heat Exchanger, Part II: Numerical Investigation 双管换热器的传热和流体流动,第二部分:数值研究
Pub Date : 2020-11-05 DOI: 10.51983/arme-2020.9.2.2478
Shreyas Kotian, N. Methekar, Nishant Jain, P. Naik
Analysis of thermo hydraulic characteristics in a simple configuration of the double-pipe heat exchangers adds a great value to the design of heat exchangers. This paper presents a comparison of the experimental observations and numerical predictions for the thermal characteristics of the double pipe heat exchanger. A CAD design was developed and the Realizable k-ε mathematical model coupled with enhanced wall treatment gave the closest results. Experiments were performed for 60 ≤ Re ≤ 240 for two different inlet temperatures of the hot fluid, 50°C, and 70°C keeping the inlet temperature of the cold fluid constant at 31°C. Temperature gradients extracted from ANSYS Fluent were compared with the experimental data. Further, pressure and temperature contours for the hot and cold streams were generated to analyze the performance parameters.
分析一种简单结构的双管换热器的热水力特性,对换热器的设计具有重要的参考价值。本文对双管换热器的热特性进行了实验观测与数值预测的比较。开发了CAD设计,Realizable k-ε数学模型与强化壁面处理相结合,得到了最接近的结果。在热流体进口温度为50℃和70℃的条件下,在60≤Re≤240的条件下进行实验,冷流体进口温度为31℃。将ANSYS Fluent提取的温度梯度与实验数据进行对比。此外,还生成了冷热流的压力和温度曲线,以分析性能参数。
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引用次数: 0
A Literature Review on Global Challenges for Third Party Logistics (TPL or 3PL) 第三方物流(TPL或3PL)全球挑战的文献综述
Pub Date : 2020-11-05 DOI: 10.51983/arme-2020.9.2.2479
D. J. Hiran Gabriel, M. Parthiban
Initially, all manufacturing industries had a separate logistics department of their own for the movement of their produced goods and services. This added to the complexity and cost to the industries since they had to maintain a huge workforce for the process. Thus, companies started hiring third parties for logistics purposes, these third parties are known as Third Party Logistics (TPL) or 3PLs. Nowadays every company employs TPLs for service to carry out shipments thus focussing on their core area of development than logistics. These 3PL firms face certain challenges globally in delivering services to their customers. The paper aims to have a systematic review of the challenges faced globally by 3PLs. The paper gathers information from many pieces of literature on three important challenges namely minimizing the lead time, adapting to the Industrial Dynamics, and adapting to the advancement in technologies. The review will be helpful for future scholars in listing the challenges faced by these industries globally.
最初,所有制造业都有自己独立的物流部门,负责生产的商品和服务的运输。这增加了行业的复杂性和成本,因为他们必须为这个过程维持大量的劳动力。因此,公司开始为物流目的雇用第三方,这些第三方被称为第三方物流(TPL)或3pl。如今,每个公司都采用第三方物流服务来进行货运,从而专注于他们的核心发展领域,而不是物流。这些第三方物流公司在向客户提供服务方面面临着全球挑战。本文旨在对第三方物流在全球面临的挑战进行系统回顾。本文从许多文献中收集了三个重要挑战的信息,即最小化交货时间,适应工业动态,适应技术进步。这将有助于未来学者列出全球这些行业面临的挑战。
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引用次数: 1
Design and Development Prototype of Indigenous Robotic Radio Pharmaceutical Dispenser 自主研制的机器人无线电配药机原型设计与研制
Pub Date : 2020-11-05 DOI: 10.51983/arme-2020.9.2.2480
Chithra Biju Menon, Irfan A. Siddavatam, V. Bhosale
Working in the nuclear medicine department leads to a possibility of long term low level radiations exposure. Imaging technologies like positron emission tomography (PET) and single photon computer tomography (SPECT) requires radiopharmaceuticals to be administered into the patients. There is radiation exposure to the staff especially when they dispense the required radioactive medicine doses with their hands into the syringes from the source vial. Also, during the process there is a possibility of spillage of the radioactive pharmaceuticals which could lead to radioactive contamination. This project aims at automating the steps involved in dispensing the unit doses into the respective syringes from the source vial and placing it in a lead shielded container. This will be achieved by developing a robotic application to carry out the activities. This will reduce the time for which the nuclear medicine staffs is exposed to the radioactive syringe. The only time when he will be exposed will be when it is injected into the patients.
在核医学部门工作可能导致长期低水平辐射暴露。像正电子发射断层扫描(PET)和单光子计算机断层扫描(SPECT)这样的成像技术需要给病人注射放射性药物。工作人员受到辐射照射,特别是当他们用手将所需的放射性药物剂量从源小瓶注入注射器时。此外,在此过程中,放射性药物有可能泄漏,从而导致放射性污染。该项目旨在自动化将单位剂量从源小瓶分配到相应注射器并将其放置在铅屏蔽容器中的步骤。这将通过开发机器人应用程序来实现。这将减少核医学工作人员接触放射性注射器的时间。他唯一会接触到的时候就是注射到病人体内的时候。
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引用次数: 0
Heat Transfer and Fluid Flow in a Double Pipe Heat Exchanger, Part I: Experimental Investigation 双管换热器的传热和流体流动,第一部分:实验研究
Pub Date : 2020-11-05 DOI: 10.51983/arme-2020.9.2.2482
Shreyas Kotian, N. Methekar, Nishant Jain, P. Naik
Double pipe heat exchangers have assumed importance over the years owing to their simple construction, ease of maintenance and cleaning, and extensive use in applications involving sensible heating or cooling of process fluids. In this present study, a detailed comparison is made between the theoretical results and experimental data of the performance parameters of the heat exchanger. Experiments were performed for 60 ≤ Re ≤ 240 for two different inlet temperatures of the hot fluid, 50°C, and 70°C keeping the inlet temperature of the cold fluid constant at 31°C. Graphs were plotted between various performance parameters such as overall heat transfer coefficient, effectiveness, NTU, outlet temperatures of the hot and cold streams against mass flow rates of the fluid. Lastly, a comparison was done between the theoretical data and experimental results and they showed good accordance with a mean deviation of 10-12%.
多年来,双管热交换器由于其结构简单,易于维护和清洁,以及在涉及工艺流体的显着加热或冷却的应用中广泛使用而具有重要意义。本文对换热器性能参数的理论计算结果与实验数据进行了详细的比较。在热流体进口温度为50℃和70℃的条件下,在60≤Re≤240的条件下进行实验,冷流体进口温度为31℃。绘制了各种性能参数之间的图表,如总传热系数、效率、NTU、冷热流出口温度与流体质量流量之间的关系。最后,将理论数据与实验结果进行了比较,结果吻合较好,平均偏差为10-12%。
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引用次数: 0
Numerical Investigation in Augmentation of Heat Transfer in a Rectangular Duct Using Al2O3 and CuO Nanofluids Al2O3和CuO纳米流体增强矩形管道传热的数值研究
Pub Date : 2020-11-05 DOI: 10.51983/arme-2020.9.2.2481
D. Christopher, Tsegaye Alemayehu Atiso, Mebratu Markos
A numerical investigation was conducted to predict the greater thermal enhancement in the rectangular duct using different nanofluids – Aluminum oxide (Al2 O3) and Copper oxide (CuO) are employed in the investigation and magnitude are compared with base fluid to ascertain the augmentation of thermal efficiency. Ansys-Fluent 13 used for simulation to identify the augmentation of heat transfer among fluids. A simulation conducted in Laminar flow with Reynolds number (Re) ranges from 20 to 40 at constant heat flux 2000 W/m2. The research reported the contour of temperature distribution, pressure variation, and magnitude velocity, Result reveals that copper oxide nanofluids have produced significant thermal performances than other nanofluid particles.
采用不同的纳米流体——氧化铝(al2o3)和氧化铜(CuO)进行了数值研究,并与基液进行了幅度比较,以确定热效率的提高。采用Ansys-Fluent 13进行模拟,以确定流体间传热的增强。在恒热流密度为2000 W/m2时,对雷诺数Re为20 ~ 40的层流进行了数值模拟。研究报告了温度分布、压力变化和幅度速度的轮廓,结果表明氧化铜纳米流体比其他纳米流体具有显著的热性能。
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引用次数: 0
Development and Travel Time Analysis of Automated Storage and Retrieval System 自动存取系统的开发与行程时间分析
Pub Date : 2020-11-05 DOI: 10.51983/arme-2020.9.2.2483
Anuradha S. Parab, P. Gore
Automated storage and retrieval system (AS/RS) is major automated storage method mainly used in warehouse and distribution centers. Objective of the study is to analyze expected travel time while performing storage/ travel request for randomized storage allocation and return to input-output dwell point policy. Single and Dual command cycle time expressions are verified through mathematical calculations and experimental observations.AS/RS model is prototyped with the help of Arduino Uno microcontroller board used as programmable controller system. Android interfacing makes system easy to access and control. Physical prototyping of AS/RS ensures better knowledge gain related to hardware, software and communication interfacing module.
自动存取系统(AS/RS)是一种主要应用于仓库和配送中心的自动化存储方式。研究的目的是分析在随机存储分配和返回输入-输出驻留点策略中执行存储/旅行请求时的预期旅行时间。通过数学计算和实验观察验证了单命令和双命令周期时间表达式。利用Arduino Uno微控制器板作为可编程控制器系统,对AS/RS模型进行了原型设计。Android接口使系统易于访问和控制。AS/RS的物理原型确保更好地获得与硬件,软件和通信接口模块相关的知识。
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引用次数: 0
Advanced Beverage Can Crusher Machines: A Review 先进的饮料罐破碎机:综述
Pub Date : 2020-05-05 DOI: 10.51983/arme-2020.9.1.2473
A. Elfasakhany
Beverage Can crushing machine is a device, which is used to compact scrap metal Cansinto small size ones, and, in turn, the Canswould be reused later as new products. Many designs for the Can crushers are applied for such compacting process, some simple and other complicated. This work presents a review study for the advanced or up to date beverage Can crusher machines. Several issues described new designs for the advanced Cans crushing processes are presented in the current study.
饮料罐压碎机是一种将废金属罐压碎成小尺寸的设备,这些罐可以在以后作为新产品重复使用。在这种压实过程中,采用了多种设计的破罐机,有的简单,有的复杂。本文对先进或最新的饮料罐破碎机进行了综述研究。本研究提出了几个问题,描述了先进的罐头破碎工艺的新设计。
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引用次数: 0
Agricultural Robots: The Applications of Robotics in Smart Agriculture: towards More Advanced Agro Informatics Practice 农业机器人:机器人在智能农业中的应用:迈向更先进的农业信息学实践
Pub Date : 2020-05-05 DOI: 10.51983/arme-2020.9.1.2472
P. Paul, R. R. Sinha, Sreeramana Aithal, R. Saavedra, B. Aremu, S. Mewada
Robotics is a machine which is supported by the Artificial Intelligence and Expert Systems. This is basically run with the programmable computer which is run and does the performance and activities automatically. The robotics systems can be done with the integrated systems built inside or it may be done by the external controlling mechanism. It is not mandatory that a robot always looks like a human being. It could be of any form and designing or shape, however, the things in robotics is that it is operated automatically. Robots are applicable in diverse areas and sectors and among these important are include healthcare, business, agriculture, transportation, manufacturing etc. As far as agriculture is concerned, Robotics is very much associated with the various pre and postproduction of agriculture and similar sectors. Initially in harvesting only the robotics were used but currently, there are more concerns where robotics can be applicable viz. drone for the weed controlling, plant seeding, environmental assessing and monitoring, soil mapping and analysis, etc. Initially, only basic Information Technology tools were common in agricultural practices but in recent past, many technologies are using in agriculture and among these important are Cloud Computing, Big Data, HCI, Usability Engineering, Robotics and AI, etc. According to the market analysis companies the growth of the robotics is very increasing and will touch the high very soon. This paper talks about the basics of robotics including a special focus on agriculture. Paper also highlighted the areas of applications with the concern of issues and challenges in brief.
机器人技术是一种由人工智能和专家系统支持的机器。这基本上是与可编程计算机一起运行的,它自动运行并执行性能和活动。机器人系统可以通过内置的集成系统来完成,也可以通过外部控制机构来完成。机器人并不一定要长得像人类。它可以是任何形式、设计或形状,然而,机器人技术的特点是它是自动操作的。机器人适用于不同的领域和部门,其中重要的是包括医疗保健,商业,农业,运输,制造业等。就农业而言,机器人技术与农业和类似部门的各种前期和后期制作密切相关。最初在收获中只使用机器人技术,但目前,机器人技术在杂草控制、植物播种、环境评估和监测、土壤制图和分析等方面的应用越来越受到关注。最初,只有基本的信息技术工具在农业实践中很常见,但在最近的过去,许多技术被用于农业,其中重要的是云计算、大数据、HCI、可用性工程、机器人和人工智能等。根据市场分析公司,机器人的增长非常迅速,很快就会达到高峰。这篇论文讨论了机器人的基础知识,包括对农业的特别关注。论文还重点介绍了应用领域中存在的问题和面临的挑战。
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引用次数: 1
期刊
Asian Review of Mechanical Engineering
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