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ultrasonic motion detector schematic


Posted by: seminar presentation
Created at: Saturday 29th of May 2010 06:38:04 AM
Last Edited Or Replied at :Saturday 29th of May 2010 06:38:04 AM
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losed until the cover is removed and is connected to the tamper circuit at the control panel.
3. 12VDC Supply Terminals. These detectors require a 12Volt supply from the panel.


Circuit description
The circuit uses a matched pair of 40 kHz transducer elements to detect movement up to 22 feet away. Crystal locked circuit for maximum stability. An LED is switched on for movement indication. The transmitter sends out a steady ultrasonic signal at 40kHz( wavelength ~= 6 mm).
The reflected sound is detected by ultrasonic receiver. The
signal is then amplified by amplifiers.An amp..................[:=> Show Contents <=:]



Navbelt and Guiecane


Posted by: Computer Science Clay
Created at: Sunday 01st of March 2009 02:29:13 AM
Last Edited Or Replied at :Sunday 01st of March 2009 02:29:13 AM
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stic panoramic image of the traveller's surroundings. One limitation of the NavBelt is that it is exceedingly difficult for the user to comprehend the guidance signals in time, to allow fast work.

A newer device, called GuideCane, effectively overcomes this problem. The GuideCane uses the same mobile robotics technology as the NavBelt but is a wheeled device pushed ahead of the user via an attached cane. When the Guide Cane detects an obstacle, it steers around it. The user immediately feels this steering action and can follow the Guide Cane's new path easily without any conscious effort. T..................[:=> Show Contents <=:]



Implementation Of Zoom FFT in Ultrasonic Blood Flow Analysis


Posted by: computer science crazy
Created at: Sunday 15th of February 2009 01:28:40 AM
Last Edited Or Replied at :Sunday 04th of March 2012 11:51:26 PM
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me way this is one of the explorations made for scanning the intra details of some specific objects using ultrasound named SONOGRAPHY, which is used as an alternative to x-ray photography. In this paper, the method to zoom the image or the scanned data-using zoom FFT has been discussed. It also explains the algorithm to get ZOOM FFT and how it can be obtained via simulation. Real time experimentation and its applications, with basics of ultrasound scanning are also explained. Here a specific application will be dealt i.e., ultrasonic blood flow analyzer using ZOOM FFT.

Blood flow analysis i..................[:=> Show Contents <=:]



ULTRA SONIC TECHNIQUES FOR THE DETECTION OF HIDDEN CORROSION IN AIR CRAFT WING SKIN


Posted by: seminar projects crazy
Created at: Friday 30th of January 2009 12:42:47 PM
Last Edited Or Replied at :Tuesday 15th of March 2011 12:33:41 AM
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point inspects large aircraft wing skin areas. In addition it is too difficu..................[:=> Show Contents <=:]



Waterjet Cutting WJC


Posted by: Computer Science Clay
Created at: Sunday 25th of January 2009 01:53:24 PM
Last Edited Or Replied at :Saturday 18th of February 2012 05:03:11 AM
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er energy and hence cut faster. The presence of impurities can reduce the effectiveness of the abrasive, for example, silica being lighter than garnet, if present, may reduce the cutting efficiency. Consistency in particle size distribution and range will result in even performance in cutting. Defects in abrasive mineral grains lead to unexpected behaviour of garnet. Removal of Fines and dust in abrasives used is critical to avoid clogging. Oversized abrasive particles, if present, lead to blocking and clogging in the nozzle. Hence, largest particle should be less than half the size of the no..................[:=> Show Contents <=:]



Mobile Virtual Reality Service VRS


Posted by: computer science crazy
Created at: Monday 22nd of September 2008 02:35:02 PM
Last Edited Or Replied at :Friday 28th of December 2012 11:54:07 PM
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where in real time through the use of mobile telecommunication devices and networks. Furthermore, the VRS is the conversion of a physical system into its digital representation in a three-dimension (3D) multimedia format. This paper addresses one aspect of the notion of bringing an actual multimedia environment to its virtual presence everywhere in real time .

An international telecommunication union (ITC) recommendation document, containing ITU's visions on mostly forward-looking and innovative services and network capabilities, addresses the capability needed in a telecommunication system..................[:=> Show Contents <=:]



Implementation Of Zoom FFT in Ultrasonic Blood Flow Analysis


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:46:53 AM
Last Edited Or Replied at :Wednesday 14th of March 2012 02:02:27 AM
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ue, wherein a very small frequency change due to the clot formation can be obtained with a good resolution. It can be used to locate the initial presence of a blood clot. All of these tasks must be achieved with a single DSP chip in order for the system to be both cost-effective and power
efficient and thus widely accepted.

This paper proposes:
1.Study of Bio-medical signal processing
2.Mixing down the input signal to the base band frequency using Hilbert Transform
3. Finding the down sampling using the decimation process
4.Obtaining the spectrum output using fast Fourier transform
5..................[:=> Show Contents <=:]



Ultra Sonic Motor


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:24:45 PM
Last Edited Or Replied at :Sunday 20th of June 2010 06:43:50 AM
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ed for these applications because they require quick and precise speed control of actuators for various load conditions. A speed control method of USM using adaptive control is proposed.
Artificial Neural Network (ANN), which follows the biological neural cells in brain, consists of a number of neurons and weighted links, and it has a good potential for control applications because it can approximate the non-linear input-output mapping of the plant. Accordingly, ANN has been applied widely in the field of power electronics control. In this paper a three layer neural network for speed controll..................[:=> Show Contents <=:]



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