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Development of Acoustic Emission High-speed Data Acquisition System You Ting1, a, Li Pei-jiang2, b, Tong Guan-jun3, c, and Shen Jian-wei4, d 1Department of Electrical and Computer Engineering Quzhou College Quzhou, China 2Department of Electrical and Computer Engineering Quzhou College of Technology Quzhou, China 3Shanghai Institute of Technical PhysicsChinese Academy of Science Shanghai, China 4Technology Development SectionZhejiang Switch Device Co, LtdQuzhou, China ayoutingmail@163, com, blpj669 @163, com, cguanjun.tong@gmail.com, dsjw1818@sohu, com Keywords: Acoustic emission detection; CPLD; USB2, 0; High speed; Data acquisition system Abstract.
well as rapidly, In this paper, an USB based acquisition system for acoustic emission signal is designed, which adopts CPLD as controller and uses two high-speed A/D converters to achieve synchronous acquisition of two-channel acoustic emission signals, The system first puts collected data into a FIFO and then transfers data to host through USB using CY7C68013, The sampling frequency of the system is up to 10MHz and the transmission rate of USB is 40M/S, Hard body impact test and lead-breaking test indicate that the system can achieve real-time acquisition of acoustic emission signal well, Introduction With the continuous development of detection technique, acoustic emission detection, an important emerging non-destructive detection technique is more and more widely used in many industries, It is primarily a new dynamic non-destructive detection method to determine the extent of internal damage utilizing stress wave issued from internal structure, The detection theory is: the material
under external or internal force will deform or fracture and release stress strain energy in the form of elastic wave, the phenomenon is referred to as Acoustic Emission (AE for short) [1], AE is a common physical phenomenon, If the released strain energy with AE is large enough it will generate the sound which is audible to human ears, Most metal materials send out so weak AE signal when plastic deformation and fracture occur that cannot be directly heard by human ear, AE signal has a wide frequency range which covers infrasonic frequency, acoustical frequency and ultrasonic frequency, It is necessary to adopt sensitive electronic instrument for detection, AE signal is acquired from the components or materials in motion and variation as well as is off-line analyzed combined with the AE physical characteristics of material, so the potential defects in the components or materials can be detected [2-3], AE signal is generally a high-frequency signal which is burst and broadband,
these two experiments and display the waveforms according to 128:1 (display 1 dot per 128 points), as shown in Figure 6 and Figure 7, Figure 8 and Figure 9 are FFT waveforms of the two groups of signals respectively, Fig. 6 Waveform of impact test Fig. 7 Waveform of lead-breaking test Fig. 8 FFT of impact test Fig. 9 FFT of lead-breaking test Comparing these two waveforms and their FFT results, it can be seen that the wave peak of impact test is smaller, the frequency is low and the bandwidth is narrow; while the waveform generated by lead-breaking test has higher frequency components and the bandwidth is wide, The experiment shows that the AE high-speed data acquisition system can capture AE signal and meet the accuracy demand of AE data acquisition, After data transmission test, the USB transfer rate of the system is up to 42MB/S, which satisfies the transmission rate request of the system, References [1] Editorial review board of "Training materials
for qualification and certification of NDT personnel by science, technology and industry for national defense", Acoustic Emission Test [M], Beijing: Mechanical Industry Press, 2005, [2] Yang Yingjun, Qin Li, et al, The Design of Multi-channel High-speed Data Acquisition System [J], Micro Computer Information, 2008, 24 (2-2):169-170, [3] Yang Ruifeng, Ma Tiehua, A Study on the Application of Acoustic Emission Technique [J], Journal of North University of China (Natural Science), 2006, 27 (5): 456-461, [4] Sell J, Overview of new Acoustic Emission (AT) Systems [C], EWGAE, 2004: 691-698, [5] Tong Guanjun, Wang Ruli, The Development of Multi-channel Acoustic Emission High-speed Data Acquisition System [J], Non-destructive Testing, 2009, 31 (2): 150-153, [6] H, Goto, Y, Hasegawa, and M, Tanaka, “Efficient Scheduling Focusing on the Duality of MPL Representatives,” Proc, IEEE Symp, Computational Intelligence in Scheduling (SCIS 07), IEEE Press, Dec, 2007, pp, 57

Preparation of Polymer Composite: Low Natural Rubber, Cassava Starch and Palm Fiber Duangporn Riyapan1,a, Sa-Ad Riyajan2,b and Pramuan Tangboriboonrat3,c 1Department of Materials Science and Technology, Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Songkhla, 90110, Thailand Phone +6674888361, Fax 66 74446925 2Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand be-mail: saadriyajan@hotmail.com Keywords: Natural rubber, palm fiber length, composite, chemical agent Abstract: The objective of this present work was to the preparation of polymer composite from low grade natural rubber (LNR), cassava starch (CSt) and palm fiber by using two-roll mill and then compression molding.
Introduction Nowadays, the rubber composites which made from two or more constituent materials with significantly different physical or chemical properties are attracting for area of research and development.
Among the different natural fibers, oil palm fibers appear to be promising materials due to toughness of oil palm fiber [2].
Experimental 2.1 Materials: The main materials used for this work were Low grade natural rubber (Rubber Research Institute), potassium persulphate 99%, RFCL Ltd (India) while CSt containing 32% amylose was purchased from General Starch Co.Ltd, Bangkok, Thailand.Palm fiber was obtained from oil palm frond through a process developed by Local Thailand.
International Journal of Modern Eng Research (IJMER).6 (2012) 4683-4690

Introduction Mono crystalline silicon prime wafer is the most suitable materials for substrates to fabricate the advance device and complicated GLSI IC structure on.
Defect reaction and its application to silicon materials technology[J].
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Scientists have done researches on ZnO as antibacterial materials since the early 1950s [3].
Recently, nanomaterials have drawn more attentions because of the functionalities unavailable to micron structured materials [4].
The results will provide necessary references for development and research of coating materials and antibacterial agents.
Materials and methods Dry ZnO nanoparticles (Romeoville, IL, USA) with the diameter of 200~400 nm and polyethylene Glycol 400 (PEG400) and PVP from Fluka (Milwaukee, WI, USA) were used in this work.
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Recycled rubbers are widely applied in the area of industry, traffic and building industry, as materials suppressing vibrations and insulating materials.
Materials and Methods The two-component epoxy resin Eco Epoxy 1200/324 was filled.
Wang, The status of recycling of waste rubber, Materials and Design. 22(2) (2000) 123-127
Di, Mechanical property of nano-particles reinforced epoxy resin composite materials, Advanced Materials Research. 181-182 (2011) 99-102
Cecil et al., Tensile tests of phenol formaldehyde glass-powder reinforced composites: Pilot study, Journal of Applied Polymer Science. 116 (2010) 10-17

Experiments Raw Materials Cement used in this study was P.II 52.5R Portland cement, the chemical compositions and the physical and mechanical properties are given in Table 1 and Table 2, respectively.
Acknowledgment This research is supported by the Chinese National 973 Foundation Grant (No.2009CB623203), the National Science Foundation of China(No.50178044), Chinese Postdoctoral Science Foundation (20070421036) and Natural Science Foundation of Jiangsu Province (BK2005216).
Civil Aviation Science & Technology (in Chinese), 2000, (3):74-75 [5] HU Shuanke.
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Introduction Multi-scale structure refers to the inhomogeneous distribution of the material concentration and velocity in the material transformation process.
This kind of structure changes not only have an important impact on product structure and properties but play a main control function in conversion process of the materials.
Kwauk, Chemical Engineering Science, 58 (2003) 521 – 535
Poalosaari, Chemical Engineering Science, 55 (2000) 1797-1806
Palosaari, Journal of Chemical Engineering of Japan, 2002, 35(11):1188-1195

Materials and methods 2.1 Animals and diets Four hundred 1-d-old female AA broiler chicks were assigned at random to 4 treatments for 6 weeks.
[4] Jernigan, M.A, Miles, R.D, Arafa, A.S: World’s Poultry Science Journal Vol 41(1985), p.99-107
[8] Giang, H.H, Viet,T.Q, Ogle,B: Asian-Australasian Journal of Animal Sciences Vol 24 (2011), p. 655-661
[11] Xu Haiyan, Xin Guomin, Wanghong: Animal Husbandry and Feed Science Vol 34 (2013), p. 45-48 (in chinese)
[13] Kunave,N, Lien,T.F: Journal of Animal Science Vol 2 (2012), p. 711-721.

Materials and Methods Material: The tested material was M.
Zhao, Correlations among Characters of Alfalfa in Germination Period under Alkaline Stress, Journal of Anhui Agri.
Chinese Journal of Grassland, 29 (2007) 8-15
Zhang, Germination and seedling growth of ultra-dried alfalfa seed under alkali stress, Chinese Journal of Eco-Agriculture, 19 (2011) 655-660
Aluminum tolerance in alfalfa as expressed in tissue culture, Crop Science, 30 (1990) 387-389

Experimental Validation of Numerical Methods of MRE Simulations Wiesław Szymczyk1 , Anna Boczkowska2 , Tadeusz Niezgoda1 , Konrad Zubko 3 1 Military University of Technology, Faculty of General Mechanics Kaliskiego Str. 2, 00-908 Warsaw, Poland, e-mail: w.szymczyk@wme.wat.edu.pl 2 Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 141, 02-507 Warsaw, Poland 3 Military University of Technology, Faculty of New Technologies and Chemistry, Kaliskiego Str. 2, 00-908 Warsaw, Poland, e-mail: kzubko@wat.edu.pl Keywords: magnetorheological elastomer, FEM modeling, magneto mechanical coupling Abstract.
Introduction Magnetorheological elastomers (MREs) fall into the category of smart materials.
For a relatively high-modulus matrix such as natural rubber, the fractional modulus increase with the magnetic field can exceed 50%, while it can be even larger for low-modulus host materials.
Magnetisable materials exhibit strongly nonlinear behaviours such as paramagnetism and ferromagnetism [4].
Journal of Materials Sciences.