Abstract
CAPTCHA (Completely Automated Public Turing test to Tell Computers and Humans Apart) is a program that can generate and grade tests that most humans can pass, yet current computer programs can't pass. The concept behind such a program arose from real world problems faced by internet companies such as Yahoo and AltaVista. Yahooo users free email accounts. The intended users are humans, but Yahoo discovered that various web companies and others were using bots to sign up for thousands of email accounts every minute from which they coul ....etc

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A moving train contains energy, known as kinetic energy, which needs to be removed from the train in order to cause it to stop. The simplest way of doing this is to convert the energy into heat.

The conversion is usually done by applying a contact material to the rotating wheels or to discs attached to the axles. The material creates friction and converts the kinetic energy into heat. The wheels slow down and eventually the train stops. The material used for braking is normally in the form of a block or pad

The vast majority of the ....etc

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plz send me the details about pneumatic operated emergency braking system ....etc

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anti-lock braking system, or ABS is a safety system which prevents the wheels on a motor vehicle from locking up (or ceasing to rotate) while braking.A rotating road wheel allows the driver to maintain steering control under heavy braking by preventing a skid and allowing the wheel to continue interacting tractively with the road surface as directed by driver steering inputs. While ABS offers improved vehicle control, and may decrease stopping distances on dry and especially slippery surfaces, it can also increase braking distance on loose sur ....etc

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m doing project on fabrication of dual brake single lever system for two wheeler with parking braking.so please send me material on this project.i want to know working,component using for this etc.i want to get some idea on this project.
i will be very grateful to you.

thanks ....etc

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ABSTRACT
Mechatronics is a hybrid technological field which evolved from the combination of mechanical, electronics & Software engineering. Automobiles need high degree of safety to protect the occupants and their property. Bearing this in senses we come up with a new concept of Electric pulse Magnetic Braking (E.P.M.Braking).
When the driver applies force on the brake pedal the magnitude is sensed by the pressure transducer which in turn sends the actuating signals to microprocessor. This intelligent devi ....etc

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ABSTRACT

A fuzzy logic based automatic braking system is proposed using distance and relative speed sensors as inputs and brake-pressure as output. Heuristic rules have been developed and implemented. The controller monitors the deceleration rate of the vehicle to prevent tire lock-up and the consequent loss of directional stability. The system offers the flexibility of setting the separation distance. Simulation of the controller for driving into a stationary or moving objects shows that the system is performing well. It also uses an anti l ....etc

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Abstract:
ABS system includes wheel-speed sensors, a hydraulic control unit, and an electronic control unit. When apply the brake pedal, the electronic control unit monitors and compares the signals from the wheel-speed sensors. If the electronic control unit senses rapid deceleration (impending lock-up) at a given wheel, the electronic control unit commands the hydraulic control unit to reduce hydraulic pressure to that wheel. ABS system preventing a skid and allowing the wheel to continue interacting tractively with the road surface as dire ....etc

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Automatic emergency braking system using microcontroller:

I need the pin/block diagram which explains the mechanism and also pros & cons of automatic emergency braking system using microcontroller.

Thank you ....etc

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Troubleshooting Antilock Braking
http://extremethoughts.whipieseminars/images/2202008182947.jpg
Use your trusty multimeter to check continuity through wheel speed sensors.
This sensor has a value of about 1.5 K ohms.

By Mike Allen
Photography by James Westman
Published in the February 2006 issue.

Over the river and through the woods was more dangerous back when cars had crummy bias-ply tires, rear-wheel drive and ordinary brakes. So, tonight you feel confident driving home through several inches of freshly fallen snow after a sump ....etc

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