Instrument Design Development Centre [IDDC]
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Design considerations of parametric arrays
(1998)This paper is concerned with the design, testing and performance evaluation of parametric array proposed to be used for sub-bottom applications. Some of the main parameters to be considered while designing parametric arrays ... -
Image processing and analysis of digital speckle pattern interferometric images for monitoring/surface vibration/tilt
(1997)A digital speckle pattern interferometric system to monitor surface vibrations and out of plane tilt is presented. The resolution of the system used to measure the out of plane displacement is 1/2 per fringe -
Real time monitoring of vibrations using interferometric sensor
(1997)An interferometric sensor for monitoring the localised strains and vibrations is presented. The modified Michelson interferometer is employed to process the signal received from the sensing interferometer. Details of the ... -
Application of digital speckle pattern interferometry and wavelet transform in measurement of transverse vibrations in square plate
(2004)In this paper the study of out-of-plane or transverse vibrations in a square plate using digital speckle pattern interferometry (DSPI) is presented. To improve the measurement accuracy, we have implemented a new filtering ... -
Measurement of out-of-plane static and dynamic deformations by processing digital speckle pattern interferometry fringes using wavelet transform
(2004)In this paper, we are presenting measurement of static and dynamic deformations in rectangular plate fixed at one end using digital speckle pattern interferometry (DSPI). To improve the measurement accuracy, we have developed ... -
Monitoring/measurement of out-of-plane vibrations using shearing interferometry and interferometric grating
(2002)In this paper, an application of shear plate interferometry combined with moiré readout to monitor/measure out-of-plane vibrations is presented. Moiré fringes are produced between the fringe pattern from the shear plate ... -
Display of tilt information of vibrating object in time average mode using lateral shearing interferometry and interferometric grating
(2001)We have experimentally demonstrated vibration analysis of a reflecting object in time-average mode using shearing interferometry and interferometric grating. Experimental results show that time-average moire fringes, formed ... -
Measurement of temperature and temperature profile of an axisymmetric gaseous flames using Lau phase interferometer with linear gratings
(2001)In this paper we have investigated the utility of Lau phase interferometer with linear gratings and white light source to measure temperature and temperature profile of an axisymmetric flame. The temperature measured using ... -
Wavelet filtering applied to time-average digital speckle pattern interferometry fringes
(2001)In this paper we are presenting a filtering scheme using Symlet wavelet to remove the speckle noise from the time-averaged digital speckle pattern interferometry fringes. To demonstrate the potential of Symlet wavelet ... -
Real time out-of-plane vibration measurement/monitoring using Talbot interferometry
(2000)In the present paper, application of Talbot interferometry for real-time vibration measurement is investigated. Experiments were conducted to measure/monitor out-of-plane motion of a vibrating loudspeaker membrane. ... -
A review on refractive index and temperature profile measurements using laser-based interferometric techniques
(1999)In this review we have discussed laser-based interferometric techniques for measurement of refractive index, temperature and temperature profile of burners with special emphasis on laser speckle techniques and Talbot ...
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