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320 articles for “Defect”
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Fabrication and Optimization of Process Parameters for Friction Stir Welding AA7075+10%wt.SiC Composite by Taugchi Method
Abstract: Aluminium alloy 7075 as matrix and silicon carbide (SiC) as reinforcement has been widely used in aircrafts and space industries because of high strength to weight ratio. Fusion welding of this Aluminium Metal Matrix Composite (MMC) will lead to many problems such as porosity, micro-fissuring and hot cracking. However, friction stir welding (FSW) can be used to weld this MMC without above mentioned defects. Objective of this investigation are fabrication …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 3, 2018 · pp. 102–112 Read article
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Modeling and Acoustic Analysis of Noise Vibration in Automotive Gearbox by Non-destructive Testing
Abstract: A gearbox is used for transferring power from the engine to the wheels. Predicting the vibration and noise radiation from a dynamic system like a gearbox gives designers an insight early in the design process. It was conducted experimental and modeling of vibration and noise for magnitude and pressure level variations in a Peugeot 206 automotive 5-speed gearbox. It was extract vibration data related to different periodic processing and then …
Published in Journal of Experimental & Applied Mechanics · Vol. 11, Issue 3, 2020 · pp. 54–63 Read article
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A Review: Inspection of Objects Using Computer Vision
Abstract: AbstractThis paper is motivated mainly by the need for more efficient and advanced techniques in an inspection of an object because accurate and timely information is needed for any industries to improve their quality and increase the production of goods. The objective of this paper is to provide an inexpensive and comprehensive review of defect inspection techniques. Now a day’s new computer vision technologies and image processing technologies have been …
Published in Journal of Electronic Design Technology · Vol. 10, Issue 2, 2019 · pp. 1–5 Read article
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Low-cost Air Quality Monitoring System for Dhaka City
Abstract: AbstractContamination is the expansion of any substance or any type of vitality to nature at a rate quicker than it very well may be scattered, weakened, deteriorated, reused, or put away in some innocuous structure. Pollution has become a crucial problem for busy cities all around the world. There are many types of pollution among them: air pollution, water pollution, soil pollution, food pollution, noise pollution, light pollution, thermal pollution …
Published in Journal of Electronic Design Technology · Vol. 10, Issue 3, 2019 · pp. 33–41 Read article
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Wideband Bandstop Filter Using Triangular SRR-DGS
Abstract: This article presents a dumbbell shaped triangular split ring resonator (SRR) in the design of wideband bandstop filter. Initially, a conventional dumbbell shaped triangular defective ground structure (DGS) is used to realize the single bandstop filters at the frequency of 3.55 GHz. This triangular shaped DGS structure is modified to a new structure to realize a wideband bandstop filter characteristics with the frequency range of 3.3 to 4.5 GHz which …
Published in Journal of Electronic Design Technology · Vol. 8, Issue 1, 2017 · pp. 11–16 Read article
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Design of EMG based Control System for Prosthetic Arm
Abstract: Prosthesis, field of bio-mechatronics, is an artificial extension used to replace the function or appearance of a missing limb or lost body part due to injury (traumatic), to correct congenital deficiencies or to supplement defective body parts. A myoelectrically controlled prosthesis detects muscle contractions using electrodes and this electrical activity acts as a signal to activate the prosthesis. In the presented work, the EMG signal is acquired using surface electrodes …
Published in Journal of Electronic Design Technology · Vol. 4, Issue 2, 2013 · pp. 1–6 Read article
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On-Wafer Calibration of Vector Network Analyzer – Fabrication of LRM Calibration Standard
Abstract: Vector network analyzer or VNA has become ascendant of most measuring networks above 1 GHz. These networks consist of various manufacturing defects (due to resistance, capacitance and inductance) including VNA errors. To measure these errors, VNA was calibrated using a calibration kit. The usage of this calibration kit squanders a lot of time and money; moreover, the results are not accurate. To avoid this, the concept of on-wafer calibration is …
Published in Journal of Electronic Design Technology · Vol. 1, Issue 1-3, 2011 · pp. 18–25 Read article
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Inspection of Objects using Computer Vision
Abstract: This study is motivated mainly by the need for more efficient and advanced techniques in an inspection of an object because accurate and timely information is needed for any industry to improve their quality and increase the production of goods. The objective of this study is to provide an inexpensive and comprehensive review of defect inspection techniques. Nowadays, new computer vision technologies and image processing technologies have been very important …
Published in Journal of Electronic Design Technology · Vol. 11, Issue 3, 2020 · pp. 6–16 Read article
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A Review on Current Status of Biodegradable Surgical Implant Materials
Abstract: Since many years, inert metals such as stainless steel, cobalt-chromium and titanium alloys have been the primary biomaterials used for load bearing applications. In order to these metallic implants such as pins, screws and plates for repairing the defects have to be removed by secondary surgery once the bone tissue is healed, which will increase the morbidity, pain and cost. Hence conventional metallic biomaterials are biocompatible but not biodegradable. At …
Published in Journal of Instrumentation Technology & Innovations · Vol. 10, Issue 3, 2020 · pp. 5–15 Read article
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A Technical Review on the Wear Rate of Deep-Hole Drilling Process Based on BTA (Boring and Trepanning Association) Technique
Abstract: Deep-hole drilling of hard materials like carbon steel and super alloys like Inconel-718 is a very complicated process as the wear rate of BTA inserts is quite high as compared to other materials. In this review paper author aims to study the various factors affecting the wear rate and the type of wear occurring in different inserts used for deep-hole drilling of the above mentioned materials. It also emphasizes on …
Published in Journal of Mechatronics and Automation · Vol. 4, Issue 3, 2017 · pp. 18–23 Read article
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Design and investigational study of drawability by varying blank holding force of rectangular drawn component
Abstract: The process of design and manufacturing of draw die has been carried out for rectangular shaped drawn component having thickness 1 mm of mild steel sheet has been utilized for blank material. In first phase, designed an inverted draw tool using CAD software Unigraphics NX which served the purpose of double action in a single stroke. The values of cutting force, FEA, blank holding force, tonnage of press and clearance …
Published in Journal of Mechatronics and Automation · Vol. 5, Issue 3, 2018 · pp. 1–9 Read article
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Software Development Using Component Based Testing
Abstract: Segment Testing is utilized in Software advancement. Right now, part will be tried. Principle Reason for utilizing Component testing is reuse. In Component Testing less assets utilized for growing new programming. Various sorts of Component gathered and incorporated for programming improvement. It is decreased advancement time and improved programming quality and make moves toward interactional. Testing is performed not exclusively to submit the basic programming mistake free in any case …
Published in Journal of Microcontroller Engineering and Applications · Vol. 8, Issue 3, 2021 · pp. 22–26 Read article
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Design of Street Light System Using PIC16F877A Digital Controller
Abstract: The program aims to save energy by recognizing vehicle movement on highways and activating. The clusterof streetlamps ahead of the car while shutting off the following lights. Sensors are required for the projectto activate the front lights and identify the car's motions. Our concept makes use of all the benefits thatLEDs have to offer, such as their quick switching speed, eco-friendliness, durability, and cool light output.As a result, at this …
Published in Journal of Microcontroller Engineering and Applications · Vol. 10, Issue 3, 2023 · pp. 1–5 Read article
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Design and Fabrication of Patch Antenna using DGS for WLAN and WIMAX Applications
Abstract: AbstractIn this paper a small size micro strip patch antenna with dual frequency characteristics is presented. The proposed antenna is designed on an FR-4 epoxy dielectric substrate with the thickness of 1.6 mm and dielectric constant er =4.3. The proposed antenna has used defected ground structure (DGS) stop theory to create dual frequency band characteristics 2.13GHz – 3.25 GHZ for WIMAX and 5.725GHz – 6.3084 Hz for WLAN, respectively. The …
Published in Journal of Microwave Engineering and Technologies · Vol. 7, Issue 1, 2020 · pp. 5–16 Read article
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A Compact Umbrella Shaped Patch Antenna using DGS for Dual/Triple/Quad Band Applications
Abstract: In this paper, a compact Umbrella shaped microstrip patch antenna for Quad band applications specially for X band, Ku band and K band applications is presented. The antenna is simulated using the Ansys soft HFSS simulator. The size of the antenna is 25 mm×25 mm ×1 mm and printed on an FR4 substrate. Defected ground structure in the form of concentric circular rings is used to increase the bandwidth of …
Published in Journal of Microwave Engineering and Technologies · Vol. 2, Issue 3, 2015 · pp. 36–44 Read article
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Effect of Pin Profile on Microstructure and Mechanical Properties of Friction Stir Welded AZ31B Magnesium Alloy
Abstract: Friction Stir Welding (FSW) is a solid state welding technique which was developed primarily for joining soft metal alloys. The aim of the present work was to develop a defect free friction stir joint of magnesium AZ31B sheets and to investigate the microstructural and mechanical properties of the weld. Two types of tool pins namely cylindrical and truncated conical pin profiled tools have been used to analyze its effect on …
Published in Journal of Materials & Metallurgical Engineering · Vol. 6, Issue 3, 2016 · pp. 1–11 Read article
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Green Manufacturing with Steel Swarf
Abstract: The industrial sector drives nearly one-third of global energy demand, with most of this energy used to produce bulk materials. However, the rate of recycling of metallic materials is much higher than non metallic ones, especially when the scrap is heavy. But in very loose swarfs the transformation rates are poor, and processes are unsustainable. To improve the life productivity of bulk materials, and also lower the specific energy consumption, …
Published in Journal of Materials & Metallurgical Engineering · Vol. 4, Issue 3, 2014 · pp. 21–31 Read article
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Review on Challenges in Drilling Non-metals
Abstract: Drilling is widely used in manufacturing industry and can be easily performed on all materials. It is well known that drilling produces under size of the hole and we need to carry out further operations like boring to get the exact dimensions. When coming to nonmetals like composites maintaining the dimenions in drilling operations is a critical task, as they are laminated with different materials and chances of defects present …
Published in Journal of Materials & Metallurgical Engineering · Vol. 13, Issue 2, 2023 · pp. 15–21 Read article
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Effects of Plasticizers on Structures of Chemical Functional Groups, Morphologies, Water Vapor Permeability, and Thermal Properties of HPMC/BW Biopolymer Films
Abstract: Food preservation is one of the fields that many researchers are interested in, especially in the epidemic period like COVID-19 today. The better food or agricultural products are preserved for a long time, the more it ensures social stability for state management related to food security for people. This paper introduces one kind of biopolymer films with investigation on effect of plasticizers to its characteristics. In order to produce biopolymers, …
Published in Journal of Polymer & Composites · Vol. 9, Issue 2, 2021 · pp. 10–20 Read article
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Study of Conventional Cutting Processes and Materials: A Review
Abstract: Today the world is rapidly developing. The purpose of the development is to easy the work, reduce the man power and get highly accuracy in the work. Industries now a day’s focusing on the automation for getting zero defective products as an output. This rapid development forces to create new machines for different purposes. This paper presents a brief review of some cutting machines and materials, which are used for …
Published in Journal of Polymer & Composites · Vol. 9, Issue 2, 2021 · pp. 74–80 Read article