The Experts below are selected from a list of 12048 Experts worldwide ranked by ideXlab platform
Jijun Xiong - One of the best experts on this subject based on the ideXlab platform.
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a wide range displacement sensor based on Plastic fiber macro bend coupling
Sensors, 2017Co-Authors: Jia Liu, Yulong Hou, Ping-gang Jia, Guocheng Fang, Shan Su, Huixin Zhang, Wenyi Liu, Jijun XiongAbstract:This paper proposes the strategy of fabricating an all fiber wide-range displacement sensor based on the macro-bend coupling effect which causes power transmission between two twisted bending Plastic optical Fibers (POF), where the coupling power changes with the bending radius of the Fibers. For the sensor, a structure of two twisted Plastic Fibers is designed with the experimental platform that we constructed. The influence of external temperature and displacement speed shifts are reported. The displacement sensor performance is the sensor test at different temperatures and speeds. The sensor was found to be satisfactory at both room temperature and 70 °C when the displacement is up to 140 mm. The output power is approximately linear to a displacement of 110 mm–140 mm under room temperature and 2 mm/s speed at 19.805 nW/mm sensitivity and 0.12 mm resolution. The simple structure of the sensor makes it reliable for other applications and further utilizations, promising a bright future.
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Optical fiber liquid level sensor based on macro-bending coupling
Optical Fiber Technology, 2015Co-Authors: Huixin Zhang, Yulong Hou, Shan Su, Lishuang Feng, Wenyi Liu, Jun Liu, Jijun XiongAbstract:A novel optical liquid level sensor based on macro-bending coupling of fiber is proposed. Two Plastic Fibers are twisted and twined on a polyamide stick to construct a liquid level sensor. The results show that the output light power has a linear change with the variation of the liquid level. The higher sensitivity is acquired for the higher refractive index liquid and the smaller radius of the macro-bending of Fibers. At the same time, the temperature effect to the sensor has also been researched and discussed.
Salvador Sales - One of the best experts on this subject based on the ideXlab platform.
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low cost Plastic optical fiber pressure sensor embedded in mattress for vital signal monitoring
Sensors, 2017Co-Authors: Demetrio Sartiano, Salvador SalesAbstract:The aim of this paper is to report the design of a low-cost Plastic optical fiber (POF) pressure sensor, embedded in a mattress. We report the design of a multipoint sensor, a cheap alternative to the most common fiber sensors. The sensor is implemented using Arduino board, standard LEDs for optical communication in POF (λ = 645 nm) and a silicon light sensor. The Super ESKA® Plastic Fibers were used to implement the fiber intensity sensor, arranged in a 4 × 4 matrix. During the breathing cycles, the force transmitted from the lungs to the thorax is in the order of tens of Newtons, and the respiration rate is of one breath every 2–5 s (0.2–0.5 Hz). The sensor has a resolution of force applied on a single point of 2.2–4.5%/N on the normalized voltage output, and a bandwidth of 10 Hz, it is then suitable to monitor the respiration movements. Another issue to be addressed is the presence of hysteresis over load cycles. The sensor was loaded cyclically to estimate the drift of the system, and the hysteresis was found to be negligible.
A.r. Al-hozaimy - One of the best experts on this subject based on the ideXlab platform.
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Recycled Plastic waste Fibers for reinforcing Portland cement mortar
Construction and Building Materials, 2016Co-Authors: B.s. Al-tulaian, M.j. Shannag, A.r. Al-hozaimyAbstract:Abstract Laboratory experiments were conducted to investigate the effects of recycled Plastic (RP) waste Fibers on the flexural strength, flexural toughness and Plastic shrinkage cracking characteristics of Portland cement mortar. Parameters investigated include fiber content and fiber length and tests performed include flexure and Plastic shrinkage tests. Experimental results showed a substantial increase in flexural toughness, about 26 to 61 times, and a considerable increase in flexural strength ranging from 6% to 84% of mortars reinforced with RP Fibers compared to plain mortar. Test results also showed a significant reduction in width, and total area of Plastic shrinkage cracks of slabs reinforced with an increased amount of RP Fibers compared to control slabs without Fibers. No Plastic shrinkage cracks were observed on the surface of mortar slabs reinforced with 1.5% (by volume) of 50 mm long, RP Fibers. Besides reducing the cost of Plastic waste disposal, this investigation recommends adding about 1.5% of locally produced; 50 mm long recycled Plastic Fibers to ordinary cement mortar for improving the ductility and crack arresting mechanism of the mortar matrix.
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Recycled Plastic Fibers for Minimizing Plastic Shrinkage Cracking of Cement Based Mortar
2014Co-Authors: B.s. Al-tulaian, M.j. Shannag, A.r. Al-hozaimyAbstract:The development of new construction materials using recycled Plastic is important to both the construction and the Plastic recycling industries. Manufacturing of Fibers from industrial or post-consumer Plastic waste is an attractive approach with such benefits as concrete performance enhancement, and reduced needs for land filling. The main objective of this study is to investigate the effect of Plastic Fibers obtained locally from recycled waste on Plastic shrinkage cracking of ordinary cement based mortar. Parameters investigated include: Fiber length ranging from 20 to 50 mm, and fiber volume fraction ranging from 0% to 1.5% by volume. The test results showed significant improvement in crack arresting mechanism and substantial reduction in the surface area of cracks for the mortar reinforced with recycled Plastic Fibers compared to plain mortar. Furthermore, test results indicated that there was a slight decrease in compressive strength of mortar reinforced with different lengths and contents of recycled Fibers compared to plain mortar. This study suggests that adding more than 1% of RP Fibers to mortar, can be used effectively for controlling Plastic shrinkage cracking of cement based mortar, and thus results in waste reduction and resources conservation
Rogério Nogueira - One of the best experts on this subject based on the ideXlab platform.
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Optical sensors based on Plastic Fibers
Sensors (Switzerland), 2012Co-Authors: Lúcia Bilro, Nelia Alberto, João L. Pinto, Rogério NogueiraAbstract:The recent advances of polymer technology allowed the introduction of Plastic optical fiber in sensor design. The advantages of optical metrology with Plastic optical fiber have attracted the attention of the scientific community, as they allow the development of low-cost or cost competitive systems compared with conventional technologies. In this paper, the current state of the art of Plastic optical fiber technology will be reviewed, namely its main characteristics and sensing advantages. Several measurement techniques will be described, with a strong focus on interrogation approaches based on intensity variation in transmission and reflection. The potential applications involving structural health monitoring, medicine, environment and the biological and chemical area are also presented.
Nahla Naji Hilal - One of the best experts on this subject based on the ideXlab platform.
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The possibility of enhancing some properties of self-compacting concrete by adding waste Plastic Fibers
Journal of Building Engineering, 2016Co-Authors: Abdulkader Ismail Al-hadithi, Nahla Naji HilalAbstract:An attempt was carried out to develop some properties of self-compacted concrete (SCC) by adding waste Plastic Fibers (WPF) resulting from cutting beverage bottles. Many tests were conducted to investigate the effect of adding WPF on the fresh properties, whereas other tests were applied on that kind of concrete to study the effect of this type of waste on hardened properties. For this reason, different self-compacting concrete mixtures were designed at constant water-to-binder ratio of 0.35 and 490 kg/m3of binder content. The class F fly ash was replaced with cement as 25% by weight. The eighth designated Plastic fiber contents of 0%, 0.25%, 0.5%, 0.75%, 1%, 1.25%, 1.5%, 1.75% and 2% by volume. The workability properties of self-compacting concrete mixtures were performed to slump flow diameter, T50slump flow simultaneously, V-funnel flow at the same time, and L-box height ratio. The 7, 14 and 28-day compressive strengths of self-compacting concretes were also measured. Moreover, the 7, 14 and 28-day flexural strengths of concretes were also measured. The test results showed that the Plastic Fibers have adverse effect on the fresh properties of self-compacting concrete and improvement by hardened properties.