CBSE Science Fair Exhibition Project, “Generation of electricity using pressure on mechanical bumpers” Theme “Natural Resource & their Conservation” for Class 9, Class 10 and 12

Project Name : Generation of electricity using pressure on mechanical bumpers

Theme Name : Natural Resource & their Conservation

Objective/Aim: Production of Electricity by application of pressure on a bumper on the high ways.

Scientific Principle Involved: Generation of electricity by rotating a DC Generator with the help of spring and gear system.

Material used: LDR Circuit, Wooden Board, LED, Choke, DC Generator, Gera System.

Working: A small mechanical bumper is designed in such a way that when a vehicle goes over it, it pressurizes a small spring system which rotates to move an armature (in about 2400 rpm) coil to generate electricity. The electricity generated is passed through DC voltage filtering unit and is used to charge a battery. A shadow sensing unit is so designed that when shadow falls in it (at night generally) the circuit is completed with the battery and the street light glows. That electricity we can use in many purposes.

Calculations (Power Generated by a single bumper): At each pressure applied the axil of the DC motor rotates with 2400 rpm It produces a current of 12mA (Mili Ampere)

Therefore when each car passes electricity generated = 24 mA.

In about 1 minute about 10 car passes.

In 60 minutes (1 HR), No. of card passes = 60×10=600

In one day (24 hours) No. of cars passing = 24×600=14400

Therefore electricity produced = 14400 x 24mA=345600mA=345.6A

Therefore power generated in one day (P) = I x V (Electric Current x Voltage)
(If the battery is of 4V)

= 1.5×345.6 watt

= 518.4 watt

Utility and further scope of the project:

1. Can be used in national highways and busy roads for street light.

2. Can be used in busy railway stations.

Name of the School: Hemsheela Model School, Durgapur, W.B.

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