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Ranchi, India

Ghosh A.,Indian School of Mines | Chattopadhyaya S.,Indian School of Mines | Mukherjee S.,MECON Ltd
Advanced Materials Research | Year: 2011

In Submerged Arc Welding process involves critical set of variables which are needed to control. An attempt has been made in this paper to find out-the influence of the heat input and bead volume on HAZ Hardness for Submerged Arc Welding Process of Mild steel plates. Mild steel plates are welded by changing input variables (current, voltage, travel speed, i.e. heat input) and Rockwell hardness no. has been observed on welded portion and at the zone adjacent to the welded portion. A detailed analysis of the microstructure changes is carried out to understand the HAZ softening phenomenon. © (2011) Trans Tech Publications, Switzerland. Source


Confocal microscopy is an important state-of-art in the field of optical microscopy with wide ranging applications in surface microstructuring of metal and non-metal surfaces, finger print observations in forensic sciences, 3D volume rendering of biological specimen etc. The advancement in digital image processing, availability of high speed computer with high memory size and simplicity of image grabbing technique enables the use of high sensitive CCD camera in confocal microscope setup. In addition to the inherent parameters of the confocal microscope such as the size of the confocal aperture, numerical aperture of the microscope objective etc., the camera parameters mainly camera gamma and gain affects the performance of the microscope. In the present paper the effect of camera gamma and gain on the contrast and shape of the detected target lines is studied experimentally through focal plane scanning of a 1951 USAF test target in a confocal microscope setup. The effect of camera gamma on the axial resolution of the confocal microscope setup is also studied experimentally through axial scanning with a mirror. © 2013 Optical Society of India. Source


Trademark
MECON Inc. | Date: 1999-01-27

COMPUTER SOFTWARE APPLICATION PROGRAM DESIGNED FOR USE ON A WORLDWIDE COMPUTER NETWORK TO PERFORM ANALYSES AND COMPARE OPERATIONAL PERFORMANCE DATA OF HEALTHCARE DELIVERY SYSTEMS AND TO GENERATE REPORTS REGARDING SUCH DATA IN THE HEALTHCARE INDUSTRY.


Chakraborty B.,MECON Ltd | Sinha B.K.,MECON Ltd
Sensors and Transducers | Year: 2013

Emissivity is an important consideration for temperature measurement through infrared imaging. The theoretical background depicting the role of emissivity and other significant parameters for temperature measurement with the help of an infrared camera is discussed. Experiment is carried out for estimating the emissivity of oxide coated steel surface and rusted iron surface with the help of a long wave infrared camera and using a reference surface of known higher emissivity. The measured emissivity values are subjected to statistical analysis and the final estimated value is compared with the published value. The effect of the difference between estimated value and published value of emissivity on the measured temperature is also discussed. © 2013 IFSA. Source


Chakraborty B.,MECON Ltd | Sinha B.K.,MECON Ltd
AIP Conference Proceedings | Year: 2011

Fiber optic sensor is commonly used in control and monitoring system for material deformation, strain, temperature, pressure and other industrial process parameters. Fiber optic displacement sensor based on intensity modulation can be designed by using the transmission technique where the intensity gradually changes due to change of detected laser intensity. Previous optical fiber based displacement sensors are constructed using two fibers along with a mirror arrangement or a single optical fiber acting as both transmitter and receiver such as 2X1 fiber couplers. The reported resolution of the system was in the range of 5 μm-10 μm. In our present study the displacement sensor composed of a laser source, optical fiber cable, microscope objective and power meter is designed. As in source-fiber coupling geometry, the microscope objective focuses the laser light onto a multimode glass fiber. The other end of the fiber is coupled to a power meter. As the fiber is displaced towards the focused spot, the detected power changes. The displacement resolution of 5 μm is obtained with this simple setup. In the present paper, the results of theoretical analysis and experimental study of such a simple optical fiber based displacement sensor are presented. © 2011 American Institute of Physics. Source

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