Spring coil mechanism
Rack pinion mechanism
Merits and Demerit
Scope and Uses
A large amount of energy is wasted at the speed
breakers through friction , every time a vehicle passes
So electricity can be generated using the vehicle weight
and speed (kinetic energy) as input.
So, this is a small step to try to improve this situation.
Here we are making the speed breaker of vibrating type,
when a vehicle crosses the speed breaker, it gets pressed
and then it gets back to its original position.
Dimensions of speed breaker:Height
The material used in construction of speed breakers is steel.
The shape of speed breaker is
• Length : 4m
• Width :0.45m
• The bottom layer of
the trench is filled
with concrete or with
wooden plates of
•This is for cushion
The actual height of spring is 0.3m before loading.
deflection of the spring is given by
δ = 64 w *n*N*R^3 /(G^4)
δ-deflection (in our case maximum δ =0.1m)
R= mean diameter of coil
n=no of spring turns
G= Modulus of rigidity = 8*10^4 N/m^2
N= No. of springs
no of turns in the spring to get the deflection
of 0.1m is given by
n= (0.1)G^4/(64 w*N*R^3)
Maximum load on the speed
breaker is when the vehicle
is on the middle of the speed
When the pressure in the
FRL unit exceeds the
defined level the valve
opens and the pressurized
air is given to the nozzle.
diameter of the inlet
of nozzle must be greater
Here the pressure energy
is converted to kinetic
energy i.e pressure→high
This high velocity
compressd air when hits
the runner,makes it to
It consists of a circular disc
on the periphery of which
have number of buckets
evenly spaced are fixed.
Each bucket is divided in to 2
symmetrical parts by a
dividing wall is know as
When the air strikes the
runner ,it rotates &
continues rotation due to
arrangement is used.
Ratio of speed of roller to
dynamo shaft is 1:4.
Transfers rotary motion between
It is the dc generator which is
use to generate current
Generates current as per the
The various machine elements used in the construction of power
The input gear transfers
rotational motion to the output
It coverts linear motion to
rotational and vice versa.
This is used to regulate the energy and maintain the energy at an
uniform level so that the shaft rotate at an uniform r.p.m
Here the reciprocating motion of the speed-breaker is converted
into rotary motion using the rack and pinion arrangement.
Rack and pinion gears normally change rotary motion into linear
motion, but sometimes we use them to change linear motion into
The axis of the pinion is coupled with the sprocket arrangement.
The axis of the smaller sprocket is coupled to a gear arrangement.
Finally the gear arrangement is coupled with the generator
Speed of vehicle
Pollution free power generation.
Selecting suitable generator.
No obstruction to traffic.
Selection of springs.
Low Budget electricity
Achieving proper balance of
speed and torque.
It gives low electric output
This mechanism is very economical and easy to
Two protocols of this type of speed breakers are
developed in India .not practically implemented
Practically implemented in New Jersey , China
Lots of researches and investigations are going
on to practically utilize this technique
By doing proper arrangements we may generate
high power electricity
existing source of energy such as coal, oil etc
may not be adequate to meet the ever increasing
energy demands. These conventional sources of
energy are also depleting and may be exhausted.
These are some non-conventional methods of
producing energy. This is a one step to path of
exploring the possibilities of energy from several
non-conventional energy sources.