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Sathish, S.
- Control of Robotic Wheel Chair using EMG Signals for Paralysed Persons
Authors
1 Department of Biomedical Engineering, Vel Tech Multitech, Chennai - 600062, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 1 (2016), Pagination:Abstract
Aim: In recent years, physically challenged people faces more constraint in day to-day movements. In this work, an EMG based hands-free control system for a wheelchair is proposed. Methods: Trapezium EMG signals are acquired, analyzed and then processed into a controlled movements (forward, left, right, etc.) using an embedded circuits for the wheelchair. Results: The system allows the patient to choose a smooth independent movement in the control state or non-control state. The movements depend upon the strength of the EMG signals acquired. Conclusion: The entire system consists of EMG electrodes, a microcontroller and a DC motor for the operation of the wheelchair. The control system is incorporated with muscle processing circuits which give an independent and safe movement to the paraplegic patients.Keywords
EMG, Microcontrollers, Trapezium Muscle, Wheelchair- Identification of Lung Cancer Cell using Watershed Segmentation on CT Images
Authors
1 Department of Biomedical Engineering, Vel Tech Multitech, Chennai - 600062, Tamil Nadu, IN
2 Department of Biomedical Engineering, St. Peter’s University, Chennai - 600054, Tamil Nadu, IN
3 Department of Computer Science Engineering, Vel Tech Multitech, Chennai - 600062, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 1 (2016), Pagination:Abstract
The detection of lung cancer through image processing is an important tool for diagnoses. Different methods were employed to detect the cancerous cell of a lung with image pre processing such as Gabor filter, image segmentation using watershed segmentation and feature extraction by using MATLAB. In this experiment, various Computed Tomography (CT) images of lung were used as input image and obtained the output image in JPEG format. The resultant output of this technique was evaluated. Based on the results, it shows that watershed segmentation technique is showed better results than other segmentation techniques for lung cancer cell identification.
Keywords
CT Lung Cancer Image, Image Segmentation, Thresholding Operation, Watershed Method- Detection and Evaluation of Vascular Wall Elasticity using Photoplethysmography Signals in Sinus Rhythm Subjects
Authors
1 Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad - 502285, Telangana, IN
2 Department of Biomedical Engineering, Vel Tech MultiTech, Chennai - 600062, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 2 (2016), Pagination:Abstract
Objective: This study analyzes the dilation and constriction (elastic) properties of blood vessels using a non invasive Photoplethysmography method. The dilation and constriction of blood vessel changes as a function of aging which can be analyzed using the shape of Phototplethsymogram. Methods: A preliminary test is conducted in twenty sinus rhythm subjects in the range between 20 to 73 years. Findings: The parameters like peak ratio, time ratios, valley to peak ratio, stiffness index and augmentation index are the indices to determine the dilation and constriction properties of the blood vessels. Applications/Improvements: The above parameters are evaluated with the help of appropriate hardware and software. Neural networks is trained using these parameters to classify the level of elasticity, using which the abnormalities such as Atherosclerosis, aortic stenosis, aortic regurgitation can be diagnosed.
Keywords
Atherosclerosis, Dicrotic Notch, Peak Ratio, Photoplethysmography, Sinus Rhythm- Experimental and Finite Element Analysis of GFRP Composite Laminates with Combined Bolted and Bonded Joints
Authors
1 Department of Mechanical Engineering, KPR Institute of Engineering and Technology, Coimbatore – 641407, Tamil Nadu, IN
2 Department of Production Engineering, PSG College of Technology, Coimbatore – 641004, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 10, No 14 (2017), Pagination:Abstract
The scope this research work is to develop and study the finite element analysis of GFRP composite laminates with combined bolted and bonded joint. Polymer matrix composite materials are widely used due to the reason of high strength to weight ratio. Design techniques for fastened joints have received valuable attention due to the different nature of the stress field in the proximity of the joint, the different of failure modes that can occur. A foremost goal of bolted joint research is to limit the effect of several bolting parameters on the bearing strength of the joints. These parameters such as: (a) joint geometry (b) joint configuration (c) loading condition (d) fastening parameters and (e) material parameters. The scope of the project is to examine the influence of certain factors on the strength of bolted joints in [0/90]4s GFRP composites. These features include the tightening torque (T= 15, 20, 25 & 30 Nm). The mechanical properties (Tensile & Compressive) of GFRP laminates have been examined experimentally and theoretically. From the investigational study, it is found that bolted joint and bolted - bonded joint with 6 mm diameter, 25 Nm tightening torque has the extreme strength. Most of the test specimens failed in (a) Bearing failure (b) Net tension failure (c) Shear out failure (d) Cleavage tension failure.Keywords
Epoxy Resin, Failure Modes, Glass Fibre, Tightening Torque, Washer Size- Experimental Testing on Mechanical Properties of Various Natural Fibers Reinforced Epoxy Hybrid Composites
Authors
1 Department of Mechanical Engineering, KPR Institute of Engineering and Technology, Coimbatore – 641407, Tamil Nadu, IN
2 Park College of Engineering and Technology, Coimbatore – 641659, Tamil Nadu, IN
3 SRM University, Chennai – 600089, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 11, No 25 (2018), Pagination: 1-6Abstract
Objectives: The purpose of this study was to investigate the mechanical and morphological characteristics of various bio fibers reinforced epoxy hybrid composites. Various bio fibers such as snake grass, hemp, banana, bamboo, sansevieria, ramie, sisal, jute, flax, pineapple and kenaf fibers are used as reinforcements in polymer composites and appear more attractive due to their bio degradability, low density, recyclability, easily availability and less CO2 emission. Methods: The hybrid composites reinforced with flax, kenaf, pineapple and sisal fibers were fabricated using a compression molding technique with weight ratio of fiber to resign as 40 : 60 and tested for mechanical properties such as tensile, flexural and impact strength. Findings: Among the different hybrid composites, flax/kenaf/epoxy composite produced better tensile, impact and flexural strength. SEM analysis of the fracture surface indicated that flax/kenaf/epoxy was produced without creating porosity which showed homogeneous distribution of fibers and matrix with better bonding which play an important role in improving the mechanical properties of composites.References
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