fabrication of electricity using speed breakers

I particularly like the piezo approach to solving this problem!

I think using a hydrolic ram to pressurize a storage tank that can then be bled off at a controlled rate to provide consistent energy may be the more pragmatic approach... this of course depends on whether you are dealing with a hypothetical or practical problem and what your available materials are and blah blah blah...

In any event, Great answer sb!

Interesting project.

In the US we use speed breakers (we call them speed bumps) mainly in parking lots, and occasionally in neighborhoods. They are never used on highways, other than as noise generators before toll booths, etc. Typically, we slow before reaching the bump, with wasted energy seen as heat in brakes. (In cars with regenerative braking, not all this energy is lost.) Then, we apply a small bit of accelerator to traverse the bump, so that at the top of the bump, there is no wasted energy to harvest: putting a roller there would make it difficult or impossible to get over the bump, because our tractive force would be turning the roller, rather than driving our car. If the generator were large and hard to turn, our transit over the bump would be slowed slightly, and our gasoline would be providing someone else's electricity, a principal with which few here would agree, unless we can prove that the resulting electricity is going to those in greater need than ourselves.

I've read that, in India, there are more of these speed breakers, and that drivers try to negotiate them as quickly as they can. In that case, if the speed is relatively constant over the bump, the horizontal kinetic energy should be constant, but the vertical kinetic energy (which heats the shock absorbers) would be there to harvest, if instead of heating shock absorbers, the bump collapsed and ran a generator, compressed a fluid, etc, etc.

There is a type of chassis dynamometer in which the drive wheel is cradled by two rollers. The rear roller is connected to the hydraulic pump, generator, or brake, and the front roller is mounted on ball bearings. The car cannot climb out of the cradle, because no tractive force can be transmitted against the front roller (unless, of course the bearings seize, which is why a safety chain or cable is used.) In your setup, you will want to think about how the car will both spin the roller and also be able to continue on its way. What energy will spin the roller, and where is it coming from? To spin the roller, will the car have to be accelerating or decelerating? If it is accelerating, is the energy otherwise wasted? Suppose you simply mount a roller in the road, with its crown at about road height. If a car coasts across such a roller, will the roller turn? If so, in which direction will it turn. Why? Suppose you are applying the brakes as you traverse the roller. What will you feel in the car?

Have fun, in this project and in your career.

What about air pressure.

I'm thinking about those hoses they put across the road to count cars. Each time a tire goes over it, it pushes a piston to move the counter forward.

It's true you couldn't get much from one of those but what if you had a mat made of interwoven hoses with each hose terminating at a manifold.

Those hoses seem to be pretty durable so the maintenance shouldn't be too bad.

HELLO THERE THIS IS SAURAV

I 'M REALLY HAPPY THAT PEOPLE ARE THINKING OF SUCH INNOVATIVE STEPS.YA AND ABT THIS PROJECT MY SCHOOL CONDUCTED A SIMILAR KIND OF EXPERIMENT AND WERE ABLE 2 PRODUCE ELECTRICITY ENOUGH 2 LIGHT A BULB THROUGH FLEXIBLE SPEED BREAKER CONNECTED TO A MOTOR BY MOVING A TOY CAR.

I WANNA ASK YOU A SERIOUS QUESTION CANT WE TRY TO PRODUCE ELECTRICITYBY THE ROLLING GATES THAT WE MOSTLY FIND IN MANY PARKS IN INDIA BY CONNECTING THE GATE WITH THE DYNAMO PLEASE YOUR REPLY COULD BE OF GREAT HELP

THANKING YOU