Applied Mechanics and Materials Vols. 799-800

Abstract: Muscle volume is an important indicator for the strength of the muscle. Many biomedical scientists use the muscle volume as an index for the athlete muscle power and also the health condition of the patients with muscular problems. The purpose of this study is to develop a sensor to easily and accurately gauge human upper limb muscle volume for biomedical applications. The developed sensor has many advantages for protable measurement of the human limb volume.

Abstract: Owing to the reasons of aircraft attitude error and fuel surface sloshing, the current measurement methods which use the height value of fuel sensor, flight attitude angle and aircraft acceleration information to determine the position of the fuel surface and calculate the fuel volume are inaccurate. This paper applies CATIA secondary development to automatically establish the volume characteristic database which includes various fuel surface angles and height of fuel sensors; A plurality of fuel sensors are arranged reasonably in the fuel tank to ensure that there are at least three sensors immersed in the fuel in each attitude angle, then the fuel surface is determined directly by the measured height of several fuel sensors, and fuel surface parameters are put into a simulation software as input parameters which are designed to measure the fuel volume and calculate the fuel volume in the fuel tank by interpolating. Besides, rotation test platform is designed for aircraft fuel tank with two degrees of freedom to simulate aircraft fuel measurement process. The experimental data can verify the accuracy of multi-sensor fuel measurement system.

Abstract: Essential oils are very valuable natural resources and considered as secondary metabolites. They are produced from several parts of aromatic plant by using different type of extraction techniques. Each technique produced slightly different output oil yield and smell however they produced the same major chemicals compound markers when they are analysed using chemical analysis and profiling technique. Pure essential oils are known to have very strong odor and there are several techniques used to differentiate the volatile odor generated. In this study, Electronic Nose (E-Nose) technology is used to distinguish the smell among 8 samples selected within the same Zingiberaceae family. Their pattern recognition profiles were examined by statistical analysis using Discriminant Factorial Analysis (DFA). The result shows that the E-Nose technology combined with DFA were successfully discriminating all 8 samples within the same family with significant p-values < 0.05 across all samples and 100% recognition value.

Abstract: This work presented an experimental study to observe the inside conditions and damage appearances of fiber reinforced composites material by non destructive testing (NDT) method. In order to achieve this, an open hole specimen of unidirectional glass fiber composite (GFRP) and discontinuous carbon fiber composite (DCFC) had been using as the specimen test under tensile fatigue loading and observed using post failure monitoring techniques of NDT namely computed tomography (CT) scan. The results shown that the tomography observation based on segmentation method of gray value gives a good detection on early damage appearances before final failure of GFRP and DCFC after tensile fatigue loading conditions.

Abstract: The friction welded joints made by GH4169 heat metal alloys are detected by U1traPAC system of the ultrasonic wave explore instrument. Aimed at the blemish signal characteristics, a method is put forward to identify the blemish signal in ultrasonic testing of friction welded joints based on fractal theory., A new kind of fractal dimension number calculation method—normalized scale box-counting dimension method is used to calculate the box-dimension of the blemish signal, and statistic and analysis the scopes of the box-dimension of the blemish signal and the square differ of the result. The preliminary experimental results show that the blemish signal and have each fractal dimension zones, and don’t hand over to fold. So it can use to judge whether the blemish exist or not. The method is identified to have better covariance characteristics about the blemish identify of the friction welded joints.

Abstract: This article can be divided into two parts when first one is focused on essential analyse of torque measuring problematic while second one is focused on design and construction of own measuring device. Goals of this article are to specify each variation of measuring and chose the best one for desired requirements. Designed measuring device will be used for torque analyse in the dissertation.

Abstract: This paper shows the design of a device for partial eliminating of isocyanuric acid (ICN) from swimming pool water using melamine additives. The renewal process of swimming pool water through its own purification makes absolutely necessary the elimination of isocyanuric acid that has been accumulated in the water over time. An excess of isocyanuric acid in water will then prevent chlorine effectiveness in the pool water and as a result, becomes harmful to human health. Therefore, the disinfection stage is considered as well as Isocyanuric acid (ICN) stabilization and as doing this is achieved through melamine-photometry filtering of insoluble complex ICN-M. The overall objective of these stages of purification is to eventually eliminate ICN from swimming pool. The overall objective of this device is to eventually eliminate ICN from swimming pool and then make it safe for human uses, a case that has been considered viable technologically and economically in the system treatment.

Abstract: Researchers in robotic vision technology are facing larger challenges, where the 2D technology has flaws in complex robot navigation in 3D space. Using 3D scanner, the robot is able to get a more detailed terrain construction, making it easier to carry out its tasks. The 3D image is obtained by fusing the Hokuyo URG-04LX and the 6-DOF IMU that consists of acceleration sensor and gyro sensor. IMU sensor outputs are the angle, speed, and position in 3D. Nevertheless, just the value of the angle is used in this study to construct 3D images based on geometric invariant. To reduce the interference in the sensor output, two types of filter are applied; the Gaussian filter used on the output of 2D LRF, while the complementary filter is applied to the output of the IMU sensor. Angle measurement plays an important role in term of geometric invariant for terrain construction. The complementary filter has provided the best angle measurement results with the lowest error on time constant (τ) = 0.475s and sampling time (dt) = 10ms. Thus, the proposed systems have successfully made an obvious 3D image of the terrain in the indoor testing.

Abstract: An intelligent diagnostic method based on 3-D plot continuous wavelet transform (3-D plot CWT) and fuzzy inference system is presented to investigate the detectability and classification of rotor broken bars faults in induction machine (IM) and to overcome the limitation of classical Fourier Transform (FT). This approach is successfully used with Motor Current Signature Analysis (MCSA) and suitable developed model of IM in healthy and faulty mode using Matlab environment. As first step we performed new results using 3-D plot CWT to extract the discriminating features. The features extracted from the wavelet transformed signal are the second most predominant frequency, the time range at which it occurs and the corresponding wavelet coefficients .Then as second and last step a fuzzy Inference system is designed and implemented using Matlab software with these three features extracted from the wavelet transformed signal as inputs and generates an output that classifies the fault and no fault conditions. It is observed that the results are satisfactory.

Abstract: Impedance-based structural health monitoring (SHM) techniques have been developed as a promising tool for real-time structural damage assessment, and are considered as a new non-destructive evaluation method. It is gaining popularity due to its potential of reducing maintenance costs while increasing safety and reliability. This article present the results of Finite Element analysis performed for aluminum beam with bonded piezoelectric transducer (PZT). Modeled structure was excited to vibrate at high frequency range and electromechanical impedance (EMI) plots were obtained from the harmonic analysis. Notches were introduced in the beam and the damage metrics were used to asses qualitative changes in structural properties of the system. Furthermore, a parametric study of the effects of different variables was carried out. The numerical results show a good agreement was observed.