this seminar seeks possiblity to preserve the compressive stress-induced micro cracks in concrete as they exist under applied loads. The results can be used to better understand and quantify the general relationship between stress level and crack development, as well as the effect of confinement on crack behavior. Also, it allows observations into the way small cracks are formed and then propagate in concrete, thereby making the application of fracture mechanics to concrete more accurate. Cylindrical specimens of concrete were subjected to test ....etc

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we want iee paper pdf and ppt of missile detector by ultrasonic means and activate the destroyer ....etc

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please go through the following thread for more details on 'ultrasonic tech for hidden corrosion detection'

http://seminarsprojects.net/Thread-ultra-sonic-techniques-for-the-detection-of-hidden-corrosion-in-air-craft-wing-skin ....etc

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abstract on object detection using ultrasonic waves

The project is designed to demonstrate detection of any object ahead of the ultrasonic transducer. It can be used for applications like security area monitoring and wild life photography etc.This ultrasonic detector consists of two parts: an emitter, which produces a 40 kHz sound wave; and a detector, which detects this 40 kHz sound wave and sends the signal back to the microcontroller.The ultrasonic module is interfaced to the microcontroller of 8051 family. Whenever any object approaches ne ....etc

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The study of micro cracks in concrete is very important to understand its behavior under loading and to improve this material. The direct observation in a scanning microscope is not a suitable method because the concrete is subject to drying shrinkage. Another indirect and non destructive method of observation by SEM is proposed. With this method using a single replica the micro cracks of concrete can be observed better than 0.5 m. ....etc

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ABSTRACT.
The ultrasonic testing of concrete structures has posed many problems. Conventional methods such as pulse echo and pitch catch are of limited use due to its composition, aggregates will cause scattering and multiple reflections. Alternative ultrasonic methods have been recently investigated that examine the shape of the waveform as it traverses through a complex material, the idea being not to located a single defect but to determine the overall mechanical properties within a certain region. In damaged materials, particularly ones t ....etc

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Senix ToughSonic Ultrasonic Sensors detect objects or materials through the air using non-contact technology. They are easy to use and reliable. Most materials can be detected: hard or soft, any color or transparency, flat or curved. Unlike traditional proximity sensors, they operate over longer distances and can be set up to limit object detection within a user-specified distance band ( window ).
Introduction
At last year s CIRA Symposium our group introduced a
novel system for recognizing objects using the spectral information
cont ....etc

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Abstract
Corrosion is one of the serious problem affecting airforce and other aviation industries. It affects the aircraft on its wings, surface, between joints and fasteners. The presences of corrosion underneath the paints of surface and between joints are not easy to be detected. The unnoticed presence of corrosion may cause the aircraft to crash leading to human and money loses.

To detect the corrosion present on the metal surface, various methods and tests are used. These tests conducted should be such that it does not destroy or disassem ....etc

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autonomous vehicle obstacle detection ultrasonic

Abstract
The main aim of this project is to design Obstacle Detecting Autonomous Robot using Ultrasonic Detectors.

PURPOSE :
The purpose of the project is to detect an obstacle in the path of the robot using Ultrasonic Detectors and to avoid the collision of the obstacles.

DESCRIPTION:
Now a day's every system is automated in order to face new challenges. In the present days Automated systems have less manual operations, flexibility, reliability and accurate. Due to this demand every field pre ....etc

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ultrasonic sensor code for obstacle detection using avr

It is essential to give your robot eyes for preventing crashes. Ultrasonic sensors, also known as transducers, have a similar working system as a radar or sonar by interpreting the echoes of radio or sound waves generated by the sensor. In this way, a robot can detect obstacles and the distance to obstacles. In this article, we make an overview of most popular ultrasonic sensors used in robotic applications and tutorials to learn how to interface and programming these sensors in order to ....etc

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