Title | :: |
Extraction of lumen region from OCT images of arteries using active contours |
Country | :: |
India |
Authors | :: |
Aswini Narayanan || Nair Rohit Ramesh || Venkitaselvi || Vipin R |
Page | :: |
01-06 |
Optical Coherence Tomography (OCT) is gaining momentum in the field of medical imaging and disease identification due to its several advantages over the conventional ultrasound and X-ray imaging techniques. The analysis of the numerous images obtained using OCT however is considered to be an expert's job which makes the analysis cumbersome and more prone to errors. In this paper, we employ a different methodology of image segmentation technique using the second derivative approach for the extraction of lumen area in intravascular OCT images using active contours. Active contour is an active method in image processing that has been widely used for several automated image segmentation processes which use the minimal energy function to detect the boundaries of objects in an image. This property of active contours has been used in our work to detect the lumen boundary and separate it from the artery wall. We also demonstrate the performance of the proposed method in MATLAB with the collected OCT images of arteries.
Title | :: |
Fire fighting Robot for Server Rooms |
Country | :: |
india |
Authors | :: |
Robin K Roy || Solomon T Santhosh || Vinitha PB || Vishak Ravi || Tony Mathew |
Page | :: |
07-11 |
Fire fighting is an essential but dangerous stask. A fire fighter must be able to get to a fire quickly and safely extinguis h the fire, preventing further damage and reduce causalities. Technology has finally bridged the gap between fire fighting and machines allowing for a more efficient and effective method of fire fighting. This paper discusses about a method for fire fighting in server rooms. The equipment inside server rooms is very costly, so that in accurate fire extinguishing techniques will result in huge economiclosses. The robot consists of a master and a slave. The master robot always checks the surrounding area. Upon receiving a fire signal from a flame sensor, master robot get sahigh in put signal and them as ter robot identifies the area of fire. After identifying the area ,the master robot navigates the slave robot towards the fire. At the same time the master robot transmits the fire signal to the fire station and security system. The simulation has been carried out and the results have been included in this paper.
Title | :: |
Harmonic Analysis Of Three Phase Diode Clamped Multilevel Inverters |
Country | :: |
India |
Authors | :: |
Vrinda Vijayan || Sreehari S |
Page | :: |
12-18 |
The conventional multilevel inverters (MLI) are generally categorized into three, they are diode
clamped multilevel inverter, flying capacitor multilevel inverter and cascaded H bridge type multilevel inverter.
These are having a more number of switches with less or more number of levels. Due to this problem, it can
provides a more switching losses. And also it can require more drivers for turn ON the each switches. In this
paper proposed a harmonic analysis of diode clamped multilevel inverter. Phase position modulation,
Sinusoidal pulse width modulation (SPWM), Space Vector pulse width modulation (SVM), these are the common
types of switching strategies. The multilevel converter is possesses much lower component voltage stress
compared with the pulse width modulated (PWM) topologies. The SPWM control and pulse generator methods
are selected as the comparison and the THD of the proposed system is analyzed by simulating in
MATLAB/SIMULINK under different levels.
Keywords: - MLI, SVM, SPWM, THD.
[1] Mohamed Z. Youssef, Konrad Woronowicz and Kunwar Aditya, "Design and development of an e_cient multilevel DC/AC traction
inverter for railway transportation electri_cation". IEEE Trans. on Power Electron, Vol. 31, no. 4, April 2016.
[2] S. Das and G. Narayannan,"Novel switching sequences for multilevel inverters", IEEE Trans. Ind. Electron.., vol. 59, no. 3, pp.
14771487, Feb. 2012.
[3] A. Knight, J. Salmon, and J. Ewanchuk,`Single phase multilevel PWM Inverters using Coupled Inductors", IEEE Trans. Power
Electron,Vol. 24, no. 5.pp. 1259126, Mar. 2009.
[4] G. Narayanan, D. Zhaao, K. Krishnamurthy, and A. Ayyannar `Space Vector based PWM techniques for reduced current ripple in
multilevel inverters", IEEE Trans. Ind. Electron,vol. 55, no. 4, pp. 16141627, Apr. 2008.
[5] Abhijit Choudhury, Pragasen Pillay, Sheldon S. Williamson, `A hybrid- pwm based dc-link voltage balancing Algorithm for a 3-
level neutral-point-clamped (npc) dc/ac traction inverter drive", IEEE Transactions on Power Electronics), Cairo University,vol. 31,
no. 4, april 2016.
Title | :: |
High Efficient, Fault-Tolerant DC-DC Converter for Wireless Charging of Battery |
Country | :: |
India |
Authors | :: |
Sharon Joji || Renuka V S |
Page | :: |
19-27 |
Wireless charging systems are emerged nowadays as a solution to the endless number of cables required to power the household devices. To eliminate the need for wires, these systems rely on the concept of inductive power transfer. The goal of this work is to design and implement a practically efficient wireless cellphone charger which operates normally even in faulty conditions. The design part consists of a primary and secondary circuit which are interfaced via 2 coupled planar surface coils. The primary side of the circuit consists of a 2 stage converter which is responsible for supplying power to a primary source coil. The topology opted here for providing power supply for charging is a reconfiguration scheme for series resonant converter (SRC). This enables it to continue to work even in faulty situations................
Keywords - Dc-dc converter, Resonant converters, series-resonant converter.
[1] Levy Costa, Giampaolo Buticchi, and Marco Liserre, "A Fault-Tolerant Series-Resonant DCDC Converter",IEEE Trans. Power
Electron, vol. 32, no. 2, Feb. 2017.
[2] B. X. Nguyen , "An efficiency optimization scheme for bidirectional inductive power transfer systems," IEEE Trans. Power
Electron, vol. 30, no. 11, pp. 63106319, Nov. 2015.
[3] I. O. Lee, Hybrid PWM-resonant converter for electric vehicle on-board battery chargers,IEEE Trans. Power
Electron, vol. 31, no. 5, pp. 36393649, May 2016.
[4] D. Jovcic and B. Ooi, High-power, resonant dc/dc converter for integration of renewable sources, in 2009 IEEE Bucharest
PowerTech, Jun. 2009,pp. 1-6.
[5] D. Dujic, G. Steinke, E. Bianda, S. Lewdeni-Schmid, C. Zhao, and J. Steinke, Characterization of a 6.5 kv IGBT for mediumvoltage
high power resonant dcdc converter, in Proc. 2013 28th Annu. IEEE Appl. Power Electron. Conf. Expo., Mar. 2013, pp.
14381444.
Title | :: |
Libot-Librarian Robot |
Country | :: |
India |
Authors | :: |
Jackson J James || Menon Rakesh Vasudevan || Besme James |
Page | :: |
28-30 |
In this paper a ROBOT named "LIBOT - LIBRARIAN ROBOT", for the efficient delivery of books in a library is proposed. The robot is designed using sensor controlled geared motors to keep track of the library book shelf arrangements, that would help the students in acquiring the requisite book from the library with the help of Bluetooth user interface. LIBOT consists of Arduino board, Johnson motors, and chassis cum wheel setup (line follower), L clamp and sliding mechanism. The proposed work aims at reducing human effort and labour required in libraries.
Keywords - Bluetooth Module, Book-Tray, L Clamp, Rfid System, Slider, Sliding Mechanism.
[1] JackritSuthakorn, Sangyoon Lee, Yu Zhou, Sayeed Choudhury , Gregory S. Chirikjian,"An Enhanced Robotic Library System for
an Off-Site Shelving Facility",Department of Mechanical Engineering.
[2] Dan Song, Carl Henrik Ek, Kai Huebner and Danica Kragic," Task Based Robot Grasp Planning Using Probabilistic Inference",
IEEE Trans. on Robotics, vol. 31, No. 3, June 2015
[3] JingFu Jin, Shang Li Yuen, Young Hoon Lee, Chang Hyun Jun, Youngji Brigid Kim, Sungon Lee, Bum Jae You,, and Nakju Lett
Doh, "Minimal Grasper: A Practical Robotic Grasper With Robust Performance For Pick And Place TASKS", IEEE Trans. on
Industrial Electronics, vol. 60, no. 9, Sept. 2013.
[4] Deepthi Unnikrishnan, Aswani C R, Arjun K Jayaprakash, Ganesh S, "Library Assistant Robot", International Journal Of
Engineering Research and Technology, Vol.6, Issue 01, 2017.
[5] Anita Gade&YogeshAngal, "Automation In Library Management Using Lab View", IEEE, April 2016.
Title | :: |
Piezoelectric Wireless Mobile Charger |
Country | :: |
India |
Authors | :: |
Amitha V Menon || Anjana K M || Anjana S Ravindran || Divya S |
Page | :: |
31-35 |
When a person walks, there is a pressure exerted on the path.The pressure exerted is being wasted.This wasted energy can be utilized in many ways.with the presence of new technology, the wasted energy is used for charging portable devices via mid-range wireless power transfer technique.The principle behind wireless power transmission is electromagnetic induction. Piezoelectric generator is placed in the sole of a shoe in order to harness the wasted energy. Energy produced by piezoelectric generator will be approximately 1Volt, in order to get sufficient voltage for charging the device, an interleaved boost converter is used.
Key words: - Electromagnetic induction, piezoelectric generator, portable devices, wireless power transfer
(WPT)
[1]. International journal of Innovation Research in Science, Engineering and Technology : "Real Time Battery Charging System by
Human Walking" , 2 Feb 2015.
[2]. Jingjing Zhao and Zheng " A Shoe-Embedded Piezoelectric Energy Harvester for Wearable Sensors"
[3]. Zhen Ning Low "Design and Test of a High Power High Efficiency Loosely Coupled Planar Wireless Power Transfer System" ,
IEEE transactions on industrial electronics, vol.56, no. 5, May 2009.
[4]. Nathan S. Shenck, Joseph A. Paradiso: "Energy Scavenging With Shoe-Mounted
[5]. Piezoelectrics",IEEE: Volume: 21. 2001
[6]. Paul D. Mitcheson, Eric M. Yeatman, G. Kondala Rao, , Andrew S. Holmes, and Tim C. Green: "Energy Harvesting From Human
and Machine Motion for Wireless Electronic Devices", IEEE. Vol.96 2008.
Title | :: |
PV Based High Gain DC-DC Step-Up Converter With Coupled Inductors Feeding DC Microgrid |
Country | :: |
India |
Authors | :: |
Mary Adlin K M || Praveesh V V |
Page | :: |
36-43 |
A PV based high gain DC-DC step-up converter with coupled inductors feeding DC microgrid is presented in this paper. The low input voltage of PV panel is stepped up to a higher level by using DC-DC boost converter with coupled inductor. In order to achieve maximum power in its entire operation, an MPPT converter is interfaced between the input and load stages. The topology does not use electrolytic capacitors and can be used for low power applications. Low cost and simple MPPT control algorithm are the distinctive advantages of the system which are essential for renewable applications.
Keywords - Coupled inductor, DC microgrid, Maximum power point tracking (MPPT), PV system, Voltage gain
[1]. Barreto, L.H.S.C., Praa, P.P., Oliveira, D.S., Silva, R.N.A.L.: "High-voltage gain boost converter based on three-state commutation
cell for battery charging using PV panels in a single conversion stage", IEEE Trans. Power Electron., 2014, 29, (1), pp. 150158
[2]. Li, W., He, X.: "Review of nonisolated high-step-up dc/dc converters in photovoltaic grid-connected applications", IEEE Trans.
Ind. Electron., 2011, 58, (4), pp. 12391250
[3]. Hu, X., Gong, C.: "A high voltage gain dcdc converter integrating coupledinductor and diodecapacitor techniques", IEEE Trans.
Power Electron., 2014, 29, (2), pp. 789800
[4]. Wai, R.-J., Duan, R.-Y.: "High step-up converter with coupled inductor", IEEE Trans. Power Electron., 2005, 20, (5), pp. 10251035
[5]. Zhao, Q., Lee, F.C.: "High-efficiency, high step-up dcdc converters", IEEE Trans. Power Electron., 2003, 18, (1), pp. 6573
Title | :: |
Pv Module Integrated Hybrid Converter IN Stand-ALONE Applications |
Country | :: |
India |
Authors | :: |
Ashna Jose || Sijo George |
Page | :: |
44-48 |
Renewable energies are derived from natural processes that are replenished constantly and have various forms. Electricity and heat produced from solar, wind, ocean, hydropower, biomass, and geothermal resources are derived from renewable resources. The common inherent drawbacks of renewable energy are unpredictable and intermittent in nature. Hybrid system utilizes two or more energy sources, usually solar with another source power. This paper presents a new system configuration of the front-end converter stage for a hybrid photovoltaic and fuel cell system with maximum power point tracking (MPPT) technique. This configuration allows the two sources to supply the load separately or simultaneously depending on availability. The converter is a combination of CUK and SEPIC converter. The inherent nature of CUK-SEPIC fused converter consists of input inductor to filter out high frequency harmonics, thus additional filter is not required and energy transfer depends on capacitor.
Keywords - Hybrid system, CUK-SEPIC converter, photovoltaic system, fuel cell, Maximum power point tracking (MPPT).
Title | :: |
Review on Multilevel Inverter Topologies |
Country | :: |
India |
Authors | :: |
Gopika R || Deepa Sankar || Priya Jose |
Page | :: |
49-54 |
The only constant in industry is the change in technology. One of the major inventions which invoked this change is inverters. Power electronic devices which convert DC power into AC power at desired output voltage and frequency is known as an inverter. The output voltage of a power inverter is to be a pure sinusoidal waveform with minimum distortion, which is practically difficult to obtain. In order to make pure sinusoidal waveform from the inverter with minimum distortion the concept of multilevel inverters was introduced. A stepped voltage waveform is generated with the use of number of DC voltage sources as the input and by appropriate arrangement of the power semiconductor-based devices. Several topologies of multilevel inverters are discussed here. These find their application in traction, HVDC transmission, etc.
[1]. EbrahimBabaei, SomayehAlilu, Sara Laali, "A New General Topology for Cascaded Multilevel Inverters With Reduced Number of
Components Based on Developed H-Bridge", IEEE Trans on Industrial electronics, vol. 61, no. 8, august 2014
[2]. Anjali Krishna R, Dr L Padma Suresh; "A Brief review on Multilevel Inverter Topologies"; International Conference on Circuit,
Power and Computing Technologies [ICCPCT], 2016.
[3]. Dr.T.Vamsee Kiran, N Babji, "Design of a novel cost effective cascaded H – Bridge Multilevel Inverter Topology", International
conference on Signal Processing, Communication, Power and Embedded System (SCOPES), pp. 726 – 731, 2016
[4]. Pharne I.D. ,Bhosale Y.N.; "A review on multilevel inverter topology"; International Conference on Power, Energy and Control
(ICPEC), 2013
[5]. Y. Hinago and H. Koizumi, "A single-phase multilevel inverter using switched series/parallel dc voltage sources," IEEE Trans. Ind.
Electron., vol. 57, no. 8, pp. 2643–2650, Aug. 2010
Title | :: |
Sliding Mode Control of PMSG Wind Turbine |
Country | :: |
India |
Authors | :: |
Lakshmi C.V || Jesin Jose || Anagha Suresh || Jishma James |
Page | :: |
55-62 |
This paper proposes a sliding mode control of permanent magnet synchronous generator wind turbine. This method can be used for low and medium power wind turbine applications. It is also less costly than back to back two level converters. The SMC approach has great performance in nonlinear systems control such as WECS. In this paper we compare the SMC controller with the PI controller. To avoid the chattering issue caused by the SMC.A SMC controller with a modified reaching law is applied. It reduces the chattering issue and improves the total harmonic distortion property.
Keywords - Enhanced Exponential Reaching Law(EERL),Proportional Integral Derivative Controller(PID),Permanent Magnet Synchronous Generator(PMSG),Sliding Mode Controller(SMC),Wind Energy Conversion System(WECS)
Title | :: |
Solar Powered Induction Motor Pump |
Country | :: |
India |
Authors | :: |
Vinduja M || Aswin T Surendran R |
Page | :: |
63-70 |
Often it is necessary to pump water for irrigation purposes in remote areas where grid supply is not available. A PV based system can be used for such purposes. The output voltage of PV system is usually low. It has to be boosted to higher value for use in standard inverter driven induction motor by minimizing losses in converter. The converter can achieve high voltage gain using LC parallel resonant tank.. This converter has the characteristics like ZVS of semiconductor switches and high boost ratio. Moreover, the equivalent voltage stress of the semiconductor devices is lower than other resonant step up converters. The output of the converter is fed to an inverter which converts DC to AC................
Keywords - Maximum power point tracking, Voltage stress, Zero voltage switching, voltage gain, Resonant Converter.
[1]. Z. Peng, W. Yang, X. Weidong, and L. Wen Evaluation of Grid-Connected Photovoltaic IEEE Transactions on Sustainable Energy 389, 2012.
[2]. M. Kasper, D. Bortis, T. Friedli, an "Classification and comparative evaluati integrated DC-DC converter concepts," Electronics and Motion Control Conferen 2012, pp. LS1e.4-1-LS1e.4-8.
[3]. L. Zhigang, A. Q. Huang, and G. Rong switched capacitor buck-boost converter fo in IEEE Applied Power Electronics Exposition (APEC), 2012, pp. 1951-1958.
[4]. P. S. Shenoy, K. A. Kim, B. B. Johnson "Differential Power Processing for I Production and Reliability of Photovoltai Transactions on Power Electronics, vol. 2 2013.
[5]. H. Keyhani and H. A. Toliyat, "Single-Stage Multi-String PV Inverter with an Isolated High-Frequency Link and SoftSwitching Operation," IEEE Transactions on Power Electronics, vol. PP, pp. 1-1, 2013
Title | :: |
Solar Switched Boost Inverter |
Country | :: |
India |
Authors | :: |
Tenish Mohan || Ajai K || Sethulekshmi E R || Suriyamol Joseph || Surya Rajan |
Page | :: |
71-77 |
Switched Boost Inverter (SBI) is a power converter. It converts power from DC to AC with boosting in a single stage. This can be applied for micro grid and Nano grid application, hence this converter supplies the power for both DC loads and AC loads in the same time. The operation of SBI is shooting through inverter legs without causing any damage in the converter operation. Control signals for the operation of SBI is given through the sinusoidal pulse width modulation (SPWM), SBI also has good Electromagnetic interference (EMI) noise immunity.
Title | :: |
Study on Various Converter Topologies For Power Factor Improvement In SMPS |
Country | :: |
India |
Authors | :: |
Anjaly Das || Krishnakumari T |
Page | :: |
78-83 |
Due to severe power shortage, the power suppliers are unable to meet the power demand and are forced to purchase it from other states. One method to overcome power shortage, is by improving power factor at the customer side, thereby the energy wasted by various equipment due to low power factor can be reduced. Nowadays personal computers (PCs) are an inevitable part of our day to day activities for which Switched Mode Power Supplies (SMPS) is an integral part. The problem associated with multipleoutput SMPS is its very poor power factor and voltage regulation and the high totalharmonic distortion, which violate the limits of harmonic emissions set by internationalpower quality standards..........
Keywords : Multiple Output SMPS,Personnal computer,Sheppard Taylor Converter, Bridgeless Buck-Boost Converter, Zeta Converter.
Title | :: |
Application Of Phasor Measurement Units And Internet Of Things For Real Time Monitoring Of Smart Grid Using 3d Imagery |
Country | :: |
India |
Authors | :: |
Rizwan || Sona Subair || J Sanjeev || Durga M.S |
Page | :: |
84-87 |
Smart grid is the future of power grids which reinvents the system of transmission of electrical power, incorporating optimal management of the distribution of electricity and data on the electricity grid . In this form of power grid, two way passing of information and power is made possible, enabling transmission of decentralized renewable energies produced and communicating equipments like a proposed smart meter through the application of Internet Of Things (IOT). These will lead to sustainable consumption of energy and it can be monitored by the users who can limit wastage of energy and the utility to better understand the energy consumption of users. Using Wireless Sensor Networks (WSN) integrated with phasor measurement units (PMUs) can also enable better data and information exchange through the grid...........
Keywords : About five key words in alphabetical order, separated by comma
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