distance finder based on at89s52 and ultra sonic sensors hc sr04

Ultrasonic range finder using 8051 .
A simple ultrasonic range finder using 8051 microcontroller is presented in this article. This ultrasonic rangefinder can measure distances up to 2.5 meters at an accuracy of 1 centi meter. AT89s51 microcontroller and the ultrasonic transducer module HC-SR04 forms the basis of this circuit. The ultrasonic module sends a signal to the object, then picks up its echo and outputs a wave form whose time period is proportional to the distance. The ....etc

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A cheap guidance system based on AT89C52 microcontroller is developed for facilitating visually impaired people. Ultrasonic sensors are used to calculate distance of the obstacles around the blind person to guide the user towards the available path. Output is in the form of voice which the blind person can hear e.g., right, left etc. In its advance mode, the system will be able to recognize objects using image processing algorithms. Results are presented to show the validity and performance of the system.

This new visual prosthesis produces ....etc

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Detection of corrosion damage in aircraft wing skin structures is an ongoing NDT challenge. Ultrasonic methods are known and well-accepted techniques, which are relatively simple to carry out in terms of setup, probes and instrumentation and operator training. However, with conventional inspection from the top surface using a transducer at normal incidence (0o to the normal to the surface) producing a visual picture in the form of a C-scan, it is very tie consuming to point-by-p ....etc

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Music Transmission and Reception with high S/N Ratio using Fiber Optic Communication.
fiber optic cable using RS232 communication. On transmitter side, a keypad is interfaced to enter the data. On the receiver side, 16 X 2 LCD is used to display the data. Fiber optics transmission of digitized messages or information by light pulses along hair-thin glass fibers. Each fiber is surrounded by a cladding having a high index of refractance so that the light is internally reflected and travels the length of the fiber without escaping. Cables of opti ....etc

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ULTRA SONIC motor is a newly developed motor, and it has excellent performance and many useful features, e.g.: high-torque density, low speed, compactness in size, no electromagnetic interferences, and so on. USM is a kind of piezo motor. The proposed speed control scheme is assumed 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 bra ....etc

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The AT89C52 microcontroller is the heart of the design. Ultrasonic waves are transmitted to the free space and when touched the obstacle is reflected. The reflected waves are received by the receiver. The demodulator is used to process the signal and gives the processed signal to the microcontroller. The microcontroller then actuates the relay connected to the APR9600 of the voice IC by which the blind person can get to know the obstacle. The microcontroller is provided with an oscillator frequency of 12 mhz, and a l ....etc

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to get information about the topic Robotics of distance mesuring using ultra sonic sensors related topic refer the page link bellow

http://seminarsprojects.net/Thread-ultrasonic-sensor-based-dc-motor-control-using-labview ....etc

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ULTRA- FAST ULTRA - HIGH INTENSE LASER

ABSTRACT

The year 2008 will probably known as the year of ultra mobile PCs with a slew of Ultra Mobile PCs being released by different companies. Ultra mobile PC promises to support wired or wireless network to which is a major plus as gives a number of options for net connection along with mobility. On the specification side the device sports s 7 inch LCD screen with a resolution is adequate for running applications. The screen is flanked b stereo speaker ....etc

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PAPER SUBMITTED BY:
B.V.KRISHNAKOWSIC
N.NAVEENKUMAR




ABSTRACT:
Blindness is more feared by the public than any other ailment. Artificial vision for the blind was once the stuff of science fiction. But now, a limited form of artificial vision is a reality .Now we are at the beginning of the end of blindness with this type of technology. In an effort to illuminate the perpetually dark world of the blind, researchers are turning to technology. They are investigating several electron ....etc

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plese give me more information about digital transmission system using psk for the transmission and reception of text messages ....etc

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