Engineering and Science

This project is based on design, development, performance characteristics and direct investigation of solar parabolic dish concentrating system. The performance of the concentrator is experimentally investigated with the water circulated as heat transfer fluid. The system is fabricated with highly reflective glass mirrors. The experimental setup is placed in open, and the tests were carried out. The collector’s efficiency was noted. The results are encouraging to provide the data for developing hot water for rural application. The concentrated heat is absorbed by a receiver which is made up of a steel vessel fixed on the focus point. The experimental results are taken on summer and cloud free days. The results were measured 85¤c with conversion efficiency of 70%-80%. The main objective of this project is to analyse the intensity of solar radiation on the energy absorbing surface. The parabolic reflector which is in shape of circular parabolic is used to collect or project energy. If t...

It is very difficult for the normal robot to move upstairs as they are in lack of balance they may fall down easily. In order to overcome this problem, here we designed and fabricated a stair climbing robot which can adapt to any surface and will move in that way without any interruption. This machine stimulates motion of a robot so we call it as stair climbing robot. AC Motor , Tri-lobe Wheel, Gear, supporting wheel are the main parts of robot. AC motor is mounted on a platform and a gear arrangement is coupled to the motor. The pinion gear is mounted to a rotating shaft. The special type of wheel is mounted on the shaft of the AC motor. As the motor rotates the power is transmitted through the rotating shaft to the wheels hence the Tri-lobe wheel moves. The Tri-lobe wheel uses its peculiar type of wheels to move and locomote even in the irregular surfaces. PHOTOS & DRAWINGS VIDEO

The invention provides a walking device which stimulates a gait of a legged animal. The device includes a frame with spaced axial mounts, a leg, axially connected upper and lower rocker arms which limit reciprocating leg motion. The leg is driven by a connecting arm powered by a rotating crank. The position and configuration of the axial connecting sites establish a prescribed orbital path that the foot undertakes with each revolution of the crank. Both rocker arms and the crank are axially mounted to the frame. The leg has a hip joint axially connected to the upper rocker arm for limiting hip motion, a foot and a knee joint axially connected to the connecting arm. The connecting arm has three axial connecting sites, one for connecting to the knee, another to the crank, and a third connecting site defined as a centrally disposed elbow joint connecting site which connects onto the lower rocker arm and limits knee joint motion. Under power, crank rotation is transferred to the connectin...

Four bar linkage are the closed loop kinematic linkage , they perform a wide variety of motions with a few simple parts. This project discusses the design & fabrication of one such mechanism (Four Bar Mechanism). In this project Six Leg Kinematic movement works on Grashof’s principle which states that the sum of the length of the shortest and longest links must be less than or equal to the some of the other two links. However this condition is necessary but nor sufficient. Mechanism satisfying this condition will fall into crank-rocker mechanism, double crank mechanism and double rocker mechanism. A frame, connecting rod, crank & a lever constitute to obtain the required motion. In this project we tried to show mainly the application of simple four bar mechanism. PHOTOS & DRAWINGS APPLICATIONS It would be difficult to compete with the efficiency of a wheel on smooth hard surfaces but as condition increases rolling friction, this li...