Papers by Keyword: Low Cost

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Authors: Manabu Tanaka, Tashiro Shinichi, Takayuki Kashima, John J. Lowke, Anthony B. Murphy
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Authors: A.A. Fernandes, E.U.C. Frajndlich, Humberto Gracher Riella
Abstract: The high pure synthetic zeolite have a large application in industry and agriculture, being nowadays in majority imported in Brazil. The biomass like rice hull ash (RHA), a rice industry waste, can be real advantageous in manufacture of different materials, since that is produced in large scale in the country. The silica extraction from RHA by alkaline leaching is a low energetic coast process and high efficiency, obtaining high pure silica with high reactive amorphous structure, very interesting for zeolite production. In this work was developed a economically feasible route for the production of high purity and crystallinity ZSM-5 zeolite, free of expensive template, starting from a low value intake, a industrial waste, producing a high value materials. The extracted silica from RHA in sodium silicate form is precipitated in the proper zeolite formation reactional mixture. The ZSM-5 have a lot of industrial applications due your high selectivity in catalytic reactions and high thermal and acid stability.
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Authors: Jiao Jiao Miao, Yong Qi Yu, Li Ping Zhang
Abstract: Tetrabutylammonium acetate, a new solvent, can dissolve cellulose (8 wt%) within 5 min at 40°C with dimethyl sulfoxide as coslovent without any pretreatment or inert gas atmosphere. The dissolution detail was recorded by Confocal Laser Scanning Microscope. And the viscosity of cellulose solution prepared from the new solvent was only 10% of that prepared from [BMIM]Cl. Moreover, the influence of molecular weight on the rheology of the cellulose solution was investigated. With the increase of the molecular weight, the viscosity was increasing and the cross-over point of the storage modulus (G′) and loss modulus (G′′) curves shifted to the lower angular frequency. The structure and mechanical properties of the fibers prepared from the cellulose solution were characterized by FT-IR, XRD, SEM and DSC. During the dissolution process, the crystalline region of the cellulose was destroyed and the celluloseIbecame amorphous. However, part of amorphous cellulose transformed into celluloseII by the wet spinning, indicated by FT-IR and XRD spectrum. SEM images showed that the resulting fibers were homogeneous with smooth surfaces and circular cross-sections. Meanwhile, the cellulose fibers had good thermal stability, measured by DSC. This work provided a promising way to prepare cellulose fibers with good physical properties, which was green, low cost and suitable for industrial production.
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Authors: Jesús Fernández-Hernandez, Diego González-Aguilera, Pablo Rodríguez-Gonzálvez, Juan Mancera-Taboada
Abstract: The robotized aerial systems (RAS) are automated systems whose main characteristic is that can be remotely piloted. This property is especially interesting in those reverse engineering works in which the accuracy of the model is not reachable by common aerial or satellite systems, there is a difficult accessibility to the infrastructure due to location and geometry aspects, and the economic resources are limited. This paper aims to show the research, development and application of a RAS that will generate geo-referenced spatial information at low cost, high quality, and high availability.
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Authors: Wang Zhe, Qin Xian, Jiao Rong Fan
Abstract: This paper describes a way to realize the manufacture of nanowires in detail, which would be discussed mainly on the implement methods as well as the specific craft. Accounting for the cost, this way relied relative fewer on the high-precision photoetching machine, while it took use of the excellent surface of Si and SiO2, applying oxidation to diminish the width of these wires[1]. The paper would cover some regulations of conditions and concrete steps to present a whole technical process.
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Authors: Liang Han, Chao Biao Li, Guo Ping Hu
Abstract: This paper describes a vision-based flexible vibratory feeding system (VBFVFS) for agile manufacturing, which mainly consists of a decupled vibratory feeder, a machine vision system, displacement sensors, power amplifiers and a computer system. Its major feeding parameters such as the vibration angle, frequency, acceleration amplitude, and phase difference all can be easily adjusted online by software means. Consequently, the system not only can feed a wide range of parts without any retooling of the feeder, but also can feed various parts made of different material in a way close to the optimal state. The VBFVFS also has intelligence. It can find out the natural frequencies of the decoupled vibratory feeder by means of automatic frequency response analysis and hence determine the best frequency for the driving signals. It can also find out any parts jamming and eliminate it by making the parts move in reverse directions. Prototypes of the decoupled vibratory feeder have been successfully developed. Experimental investigation is carried out based on the prototypes and the results agree well with the simulation results. Moreover low-cost vision technique is also discussed for the commercialization of the vision-based flexible vibratory feeding system.
434
Authors: Shariman Abdullah, Musa Mailah, Howe Hing Tang
Abstract: Data acquisition system (DAQ) plays an important role in research activities. Commercially available DAQ can be expensive and most are PC based and can be overly equipped for the task at hand. This paper proposes a low cost and mobile DAQ system with a dsPIC30 microcontroller form Microchip and program using Lubin Kerhuel Blockset for MATLAB/Simulink. An experimental rig consisting of a Maxon motor equipped with an Escon motor driver connected to a dsPIC30F3014 microcontroller was developed to demonstrate the potential of the proposed system. AFC was used as the control system and result from the experimental setup was presented in MATLAB/Simulink. Results clearly imply the viability of the proposed setup.
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Authors: Azman Ismail, Mokhtar Awang, Mohd Afendi Rojan
Abstract: A dedicated or specialized friction stir welding (FSW) machine is quite costly especially for pipe joining. Therefore, not many institutions manage to conduct their research on FSW at their facilities. Besides that, the difficulty to design a jig that can hold the complex shape such as pipe section tightly and easily to be removed during and after the FSW process respectively will nullify the intentions. In many institutions, there was either conventional or CNC milling machine available in their workshops. Thus, a jig called orbital clamping unit (OCU) was designed to suit this milling machine. It acts as an additional device to enable this milling machine to run as FSW machine at a lower cost, hence fully utilized the available facility in the workshop. Several good samples were successfully produced by using this jig and milling machine
491
Authors: Qin Sun, Xi Tao Zheng, Ye Li, Ya Nan Chai, Zheng Hua Cao
Abstract: This study explored the feasibility and potential benefits provided by the addition of through-the-thickness reinforcement to foam core sandwich structures. Through-the-thickness stitching is proposed to increase the interlaminar strength and damage tolerance of composite sandwich structures. A low-cost, out-of-autoclave processing method was developed to produce composite sandwich panels with carbon fiber face sheets, a closed-cell foam core, and through-the-thickness Kevlar stitching. The sandwich panels were stitched in a dry preform state, vacuum bagged, and infiltrated using Vacuum Assisted Resin Transfer Molding (VARTM) processing. For comparison purposes, unstitched sandwich panels were produced using the same materials and manufacturing methodology. Five types of mechanical tests were performed: flexural testing, flatwise tensile and compression testing, core shear testing, and edgewise compression testing. Drop-weight impact testing followed by specimen sectioning was performed to characterize the damage resistance of stitched sandwich panels. Compression after impact (CAI) testing was performed to evaluate the damage tolerance of the sandwich panels. Results show significant increases in the flexural stiffness and strength, out-of-plane tensile strength, core shear strength, edgewise compression strength, and compression-after-impact strength of stitched sandwich structures.
1443
Authors: Ze Qiu Wu
Abstract: In low-end equipment developing it is often have the requirement of use low-cost pressure sensors, but the maketing pressure sensors’s price is very higher than the SCM. For decrease the price of the equipment to suit the market we explored a low-cost pressure sensor disgn. It is based on the bourden tube pressure gauge, SCM control system, Gray code disc and photoelectronic reading technology. The design can suit the certain low-cost equipment.
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