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SPEED BREAKER GENERATOR
INTRODUCTION
“Green” speed bumps that will generate electricity as cars drive over them are to be introduced on Britain’s roads. The hi-tech “sleeping policemen” will power street lights, traffic lights and road signs in a pilot scheme in London that could be rolled out nationwide.
Speed bumps have long been the bane of motorists’ lives, but these will capture the kinetic energy of vehicles.
Peter Hughes, the designer behind the idea, said: “They are speed bumps, but they are not like conventional speed bumps. They don’t damage your car or waste petrol when you drive over them – and they have the added advantage that they produce energy free of charge.” An engineer who formerly advised the United Nations on renewable energy sources, Hughes added: “If it [the energy] wasn’t harnessed by the speed bumps, it would go to waste.”
The ramps – which cost between £20,000 and £55,000, depending on size – consist of a series of panels set in a pad virtually flush to the road. As the traffic passes over it, the panels go up and down, setting a cog in motion under the road. This then turns a motor, which produces mechanical energy. A steady stream of traffic passing over the bump can generate 10-36kW of power.
The bumps can each produce between £1 and £3.60 of energy an hour for up to 16 hours a day, or between £5,840 and £21,024 a year. Energy not used immediately can be stored or fed into the national grid.
“With a steady flow of traffic, four of the ramps used as speed bumps would be enough to power all the street lights, traffic lights and road signs for a mile-long stretch of street. The ramp is silent, comfortable and safe for vehicles. It is not only green energy; it is free energy, once you have paid for the capital cost of the equipment,” said Hughes. “The full potential of this is absolutely enormous.” Hughes claims that 10 ramps could generate the same power as one wind turbine.
The “electro-kinetic road ramp” system can either be raised to act as a speed bump or laid flat, so that drivers don’t realise they are passing over it.
A spokesman for Ealing council in west London confirmed that £150,000 of funding had been secured for the scheme: “The money is there for the scheme in 2009-10,” she said. “The details – how many speed bumps there will be and where they will be – still needs to be finalised. It is an innovative idea. We are excited to be part of it.”
Hughes said he had been in talks with more than 200 councils interested in introducing the system, as well supermarket chain Morrisons about a flat version of the ramp at its depot in Sittingbourne, Kent.
Speed humps were introduced in the UK in 1981. There are an estimated 30,000 in London and at least that number in the rest of the country. Conventional speed humps cost about £2,000 each.
BASIC PRINCIPLE:
 Simple energy conversion from Mechanical to Electrical.
 To generate electricity using the vehicle weight (potential energy) as input
 Possible using 3 different mechanisms:
I. Crank-shaft mechanism
II. Roller mechanism
III. Rack- Pinion mechanism
WORKING
it works on the principle that when a moving vehicle passes through this set up ,the kinetic energy of vehicle will cause roller to rotate which will further rotate transmission shaft and hence the generator armature (i.e. acting as prime mover to run generator).
When the vehicle moves over the inclined plates, it gains height resulting in increase in potential energy, which is wasted in a conventional rumble strip
When the plates come down, they crank a lever fitted to a ratchet-wheel type mechanism. This in turn rotates a geared shaft loaded with recoil springs. The output of this shaft is coupled to a dynamo to convert kinetic energy into electricity
A vehicle weighing 1,000 kg going up a height of 10 cm on such a rumble strip produces approximately 0.98 kilowatt power. So one such speed-breaker on a busy highway, where about 100 vehicles pass every minute, about one kilo watt of electricity can be produced every single minute. The figure will be huge at the end of the day
if one go through the above paragraph then one can easily find that in speed breakers electricity can be produced throug consevation of energy
MATERIALS
RUBBER
CAST IRON
ALUMINIUM
STAINLESS STEEL
COPPER
PLYWOOD
TOOLS FOR ASSEMBLY
For assembling this kit, we need the following tools and supplies:
Hex screwdriver Size 1.5,
tweezers,
pointed pliers,
hex key Size 2.5,
Torx screwdrivers Size 8, 10 and 20.
syringe of ceramic paste,
syringe of Aeroshell
fluid 12 oil, etc.
ADVANTAGES
Production of Ayad and Abd Al-Gawwad's invention could be completed with a cost of USD1500 per speed bump. "Molten iron could be used so that the speed bumps are able to withstand the strain caused by the cars driving over them daily," said Abd Al-Gawwad.
"It could even be less expensive than that if a deal is made with a company prepared to
produce them on a large scale, which could also be a way to promote local investments."
He goes on to say that the cost of maintenance for his contraption would be extremely low. With a yearly cost of USD100 or less, maintenance of these speed bumps is not only inexpensive but also straightforward, taking no more than 10 minutes to complete.
He explained that during maintenance, it takes only four individuals to pick the speed bump up off the street. After that, the gap left behind is automatically closed up and leveled with the street by means of a hydraulics-operated seal. This allows the cars to drive along without any problems and without interrupting traffic.
Ayad believes his invention could also be applied in a number of other circumstances, especially to areas that generally exhibit high levels of constant activity. For example, a similar contraption could be designed to fit into the entrance way to malls or other places where large numbers customers or employees pass with their vehicles. In this way, electricity would be generated every time an individual passes over it with his or her car. The possibilities for such an invention are endless.
DISADVANTAGES
1. It is less amount power generator
2. It is not continues generating power
3. Maintain cost is high
4. More wear & tear
COST
Total Around RS.14,000 to Rs15,000.
And depends upon the which material or metal we are used.
APPLICATIONS
 Such speed breakers can be designed for heavy vehicles, thus increasing inputtorque and ultimately output of generator.
 More suitable and compact mechanisms to enhance efficiency.
 It is used in toll tax
 It is used in mall, market, etc.