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23,675 Article Results

The Development of LOHAS Automated Guiding Vehicle

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2842
Cheng-I Hou , Han-Chen Huang , Tian-Syung Lan
Automated Guiding Vehicle (AGV) is widely used in factories, hospitals, warehouses, and offices. It can also be controlled remotely to operate under hazardous environments that are unsuitable for human presence. On the other hand, medical advancement and the decrease of birth rate are pushing the world into population aging. For elderly or the physically/mentally-challenged patient, some of the common foot problem includes diabetic foot, myotenositis, having calluses in the soles of the foot, foot deformities, etc. This research is aimed at the design and the implementation of an automated guiding vehicle, which is controlled by PC. Once the input is received from optical sensors, it will pass the information to chip, which will process the information and output the decision to stepping motor to finish the process. The research includes understanding the mechanical design, optical sensor input, defining the control units, and initiating stepping motor. Using BASIC programming, the program is burned onto a chip, which works as the central of the AGV. The result can be applied in barrier-free facilities. This research analyzes the pros and cons of AGV based on its behavior under different scenarios. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3537
Volume: 11
Issue: 11
Page: 6825-6830
Publish at: 2013-11-01

Characteristics of Electromagnetic Pulse Coupling into Annular Apertures

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2845
Yan-Peng Sun , Shi Zhang , Xiao-He An , Hong-Peng Sun
Electromagnetic pulse (EMP) coupling into the annular apertures can disturb or damage much electronic equipment. To enhance electronic system’s  capability of anti-electromagnetic interference, the finite difference time domain method (FDTD) was employed to study the characteristics of electromagnetic pulse coupling into the cavity enclosures with annular apertures. The coupling characteristics of annular apertures with different shapes (rectangle, square and circle) were discussed. It shows that, in the case of the same aperture area, the coupling energy of electromagnetic pulse into the circular annular aperture is smaller than that into the rectangular and the square ones. To the rectangular annular aperture, while the polarization direction of the incident electromagnetic pulse is perpendicular to the long side of the rectangular annular aperture, the coupling energy is larger when the aspect ratio of the rectangular annular aperture is larger. The coupling effect of incident pulse with short pulse width is obviously better than the one with longer pulse width. The resonance phenomenon of the coupled waveform occurs in the cavity. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3544
Volume: 11
Issue: 11
Page: 6848-6854
Publish at: 2013-11-01

A New Routing Protocol for Efficient and Secure Wireless Sensor Networks

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2838
Zhang Yu-quan , Wei Lei
This paper presents an improved LEACH protocol to save energy and enhance network security for wireless sensor networks. All nodes are distributed evenly in sensing area. The sensing area is divided into a number of small squares called cells, and a cluster consists of four cells. The cluster structure does not change in whole network lifetime. A cell head is chosen in each cell and a cluster head is selected from four cell heads in each cluster. The data are transmitted from clusters to the base station by employing the multi-hop manner. All nodes that communicate each other establish pairwise keys. Analysis demonstrates that the new routing protocol saves more node energy, distributes energy consumption to all nodes more evenly, prolongs more lifetime for WSNs than the LEACH protocol dose. Moreover, it enhances the security for WSNs. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3530
Volume: 11
Issue: 11
Page: 6794-6801
Publish at: 2013-11-01

Improving Negative First Routing Algorithm with Load Equalization of Virtual Channel in NoC

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2793
Tao He , Xingming Zhang , Tao Qin
This article study chip communication mechanisms deeply based on the NoC (Network on Chip) technology and a load equalization of virtual channel (LEVC) routing algorithm for Torus networks is proposed, which splits the physical network into virtual networks in the case of physical link load equalization. According to the predefined rules, packets use different virtual networks on their way to destinations and network achieve no deadlock, no livelock purpose. The algorithm study load equalization on the level of virtual channel by introducing the random factor. Simulation results show that compared with the negative first for Torus networks algorithm, the network performance can be dramatically improved for different traffic pattern by selecting a specific value of the random parameter respectively. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3483 
Volume: 11
Issue: 11
Page: 6460-6467
Publish at: 2013-11-01

Research on the Algorithm about Optical Fiber Parameters Measurement

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2825
Chen Xiao-rong , Cong Yuan , Xi Chuan-li
We can measure the geometry parameters of the optical fiber efficiently and intelligently for the use of machine vision technology, the main operations contain threshold segmentation, removing interference, filtering, fitting etc. Compared with the traditional optical fiber measurement algorithm, this method has the advantages of high processing speed, high accuracy and not too relying on the operation level. It can also be applied to the size measurement of other small linear object. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3517
Volume: 11
Issue: 11
Page: 6693-6698
Publish at: 2013-11-01

Research of Flow Characteristics Hybrid Model of Steam Turbine Stage Based on the Improved PSO Algorithm

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2810
Zhao Ming , Yan Zhengbo , Zhou Liukun , Wang Huijie , Xu Xiaogang
Power station steam turbine stage flow characteristics show the Corresponding relationship between pressure and flow rate, which is the important research foundation for analysis of steam turbine performance and the further optimization analysis of unit. Based on strict theory analysis, this article obtained two important key characteristic coefficients such as the capacity of flow coefficient and the level of group critical pressure ratio which mainly influenced the turbine characteristics. And then the secondary flow calculation model was imposed combining with the massive actual data, adapting the method of improved PSO algorithm. The practical results show that, the obtained model not only ensured good regularity and ductility, but also has higher calculation precision. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3501
Volume: 11
Issue: 11
Page: 6584-6590
Publish at: 2013-11-01

Multi-focus Image Fusion Based on Region Segmentation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2829
Yuan Jia-zheng , Li Qing , Sun Bo-xuan
We proposed a new image fusion algorithm based on region segmentation. The algorithm divided the adjacent region from the image through the edge detection, then using wavelet transform with different high-frequency fusion method in each sub-region, to retain the edge information of the source image. The experimental results showed that the image fusion algorithm based on region segmentation can overcome the drawbacks of single segmentation rule and processing in specific part, and the effect is better than the traditional wavelet-based image fusion algorithm. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3521
Volume: 11
Issue: 11
Page: 6722-6727
Publish at: 2013-11-01

Hypersonic Vehicle Tracking Based on Improved Current Statistical Model

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2772
He Guangjun , Lv Hang , Li Baoquan , Li Yanbin
A new method of tracking the near space hypersonic vehicle is put forward. According to hypersonic vehicles’ characteristics, we improved current statistical model through online identification of the maneuvering frequency. A Monte Carlo simulation is used to analyze the performance of the method. The results show that the improved method exhibits very good tracking performance in comparison with the old method. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.2786
Volume: 11
Issue: 11
Page: 6309-6314
Publish at: 2013-11-01

FPGA Based Embedded System Development for Rolling Bearings Fault Detection of Induction Motor

10.11591/ijres.v2.i3.pp127-134
Shashidhara SM , Sangameswara P Raju
Bearing fault diagnosis is crucial in condition monitoring of any rotating machine. Early fault detection in machines can save millions of dollars in maintenance cost. Different methods are used for fault analysis such as short time Fourier transforms (STFT), Wavelet analysis (WA), Model based analysis, cepstrum analysis etc. Recently, there have been outstanding technological developments related to digital systems, in both hardware and software. These innovations enable the development of new designing methodologies that aim to the ease the future modifications, upgrades and expansions of the system. This paper presents a study of rolling bearing fault diagnosis of induction motor  based on  reconfigurable logic. A case study using FPGA, its design, as well as its implementation and testing, are presented.
Volume: 2
Issue: 3
Page: 127-134
Publish at: 2013-11-01

FPGA Implementation of Park-Miller Algorithm to Generate Sequence of 32-Bit Pseudo Random Key for Encryption and Decryption of Plain Text

10.11591/ijres.v2.i3.pp99-105
Bharatesh N , Rohith S
There are many problems arises in randomized algorithms whose solutions are fundamentally based on assumptions that pure random numbers exist, so pseudo-random number generators can imitate randomness sufficiently well for most applications. The proposed scheme is a FPGA implementation of Park-Miller Algorithm for generating sequence of Pseudo-Random keys. The properties like High speed, low power and flexibility of designed PRNG(Pseudo Random Number Generator) makes any digital circuit faster and smaller. The algorithm uses a PRNG Module, it contains 32-bit Booth Multiplier, 32-bit Floating point divider and a FSM module. After generating a sequence of 32-bit Pseudo-Random numbers we have used these numbers as a key to Encrypt 128-bit plain text to become a cipher text and by using the same key to decrypt the encrypted data to get original Plain text. The Programming is done in Verilog-HDL, successfully synthesized and implemented in XILINX Spartan 3E FPGA kit.
Volume: 2
Issue: 3
Page: 99-105
Publish at: 2013-11-01

Analyzing Head and Eye Movement System with CORBA

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2814
Wang Changyuan , Zhang Jing , Chen YuLong
In order to study the vestibular system in different organs of movement as well as their collaboration between working mechanism, this paper designs a model of the common object request broker architecture (CORBA) for the head and eye movement system based on the vestibular function. By analyzing physiological characteristics of the head and eye movement model, and further introducing the structure features of CORBA. It focus on the component composition and the model design of CORBA components library. According to the physiology work model of head and eye movement, the CORBA model of head and eye movement is established. As well as the structure of the model is designed in real application of head and eye movement measurement system. This paper provides a new way to research the head and eye movement system through using mathematical modeling and application structure which is based on vestibular function.  DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3506
Volume: 11
Issue: 11
Page: 6618-6623
Publish at: 2013-11-01

Implementation of Video Capture and Playback in Mobile Systems

10.11591/ijres.v2.i3.pp106-115
Sanket Dessai , K Ramakrishna
Mobile phones are backbone of the mobile communications and have experienced fastest growing segment in the consumer market. In the 3G and 4G mobiles, video recording is an essential entertainment features so the user can record and play the video within the mobile phone. In this paper, video capture and playback implementation had been carried out by integrating the camera module to the GSM phone. An alaysis of the video processing had been carried out. Image sensor and LCD module had been interfaced with the base band processor through the video processor. To interface the different module necessary PCB schematic diagram had been arrived. Software implementation had been carried out for the Human Machine Interface for various settings of the camera module, which is integrated with the video processor. The developed playback system had been tested for the various senerious. In this video has been captured through the camera sensor and at the time of playback measured the resolution, power consumption and image transfer rates of the various modules used in the developed camera phone.
Volume: 2
Issue: 3
Page: 106-115
Publish at: 2013-11-01

Hydraulic Motor Driving Variable-Pitch System for Wind Turbine

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2804
Ye HUANG , JiBao QI
The present hydraulic variable-pitch mechanism of wind turbine uses three hydraulic cylinders to drive three crank and connecting rod mechanisms respectively; the blades are moved with the cranks. The hydraulic variable-pitch mechanism has complex structure, occupies a lot of space and its maintenance is trouble. In order to make up for the shortcomings of hydraulic cylinder variable-pitch system, the present hydraulic variable-pitch mechanism should be changed as follows: hydraulic motors are used to drive gears; gears drive blades; the electro-hydraulic proportional valves are used to control hydraulic motors. The hydraulic control part and electrical control part of variable-pitch system is redesigned. The new variable-pitch system is called hydraulic motor driving variable-pitch system. The new variable-pitch system meets the control requirements of blade pitch, makes the structure simple and its application effect is perfect.  DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3494
Volume: 11
Issue: 11
Page: 6540-6546
Publish at: 2013-11-01

An Efficient Implementation of the Entire Transforms in the H.264/AVC Encoder using VHDL

10.11591/ijres.v2.i3.pp116-121
Farhad Rad , Ali Broumandnia
The H.264/AVC standard achieves remarkable higher compression performance than the previous MPEG and H.26X standards. One of the computationally intensive units in the MPEG and H.26X video coding families is the Discrete Cosine Transform (DCT). In this paper, we propose an efficient implementation of the DCT, inverse DCTs and the Hadamard transforms in the H.264/AVC encoder using VHDL. The synthesis results indicate that our implementation of the entire transforms achieves lower power, delay and area consumption compared to the existing architectures in the H.264/AVC encoder.
Volume: 2
Issue: 3
Page: 116-121
Publish at: 2013-11-01

Extremum Seeking Control for Power Output Maximization of Proton Exchange Membrane Fuel Cell using Sliding Mode

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2774
Junsheng Jiao
Due to the nonlinear P-I characteristic of fuel cells, it is very important to implement a maximum power point tracking (MPPT) controller for practical applications. Based on analyzing the output characteristics of fuel cell power system, this paper presents extremum seeking sliding mode control method for MPPT of fuel cell power system under variable temperature and water content conditions. The approach is a combination of the extremum seeking and sliding mode methods. The simulation results show that the approach improves clearly the tracking efficiency of the maximum power available at the output of the fuel cell modules. The new method reduces the oscillations around the MPP, which has shown better performances. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.2976
Volume: 11
Issue: 11
Page: 6321-6328
Publish at: 2013-11-01
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