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Walk n charge (report)

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Walk n charge
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Walk n charge (report)

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Seminar report on waking and charging.
In this, we are generating electrical energy as non-conventional method by simply walking on the footstep.

Seminar report on waking and charging.
In this, we are generating electrical energy as non-conventional method by simply walking on the footstep.

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Walk n charge (report)

  1. 1. WALK ‘N’ CHARGE ARPIT (16284)
  2. 2. PAGE 1 Real Time Battery Charging System by Human Walking ABSTRACT Walking is the lightest form of exercise. It costs nothing but pays much. An average human takes 5000 steps a day. Each footstep creates a great amount of force which is equivalent to bodyweight of person. In this, we are generating electrical energy as nonconventional method by simply walking on the footstep. Mobile phone takes a big part in our lives nowdays. Like us they also required external source of energy to work. When our smart phone runs out of battery at the worst moment but soon taking a walk could solve this problem. The walking charger provides the power solution, it gives people the ability to charge their mobile device batteries anytime anywhere from their own walking. They can become their own personalpower source. So now when you go out for a walk you can keep yourself healthy as well as your phone battery too. We will able to save 1 billion KWH energy per year which is used up in charging phone worldwide.
  3. 3. PAGE 2 Introduction Man has needed and used energy at an increasing rate for his sustenance and well-being ever since he came on the earth a few million years ago. Due to this a lot of energy resources have been exhausted and wasted. Proposal for the utilization of waste energy of foot power with human locomotion is very much relevant and important for highly populated countries like India and China where the roads, railway stations, bus stands, temples, etc. are all over crowded and millions of people move around the clock Modern technology has led to machines to enhance the use of human- power in more efficient manner. In this context, pedal power is an excellent source of energy and has been in use since the nineteenth centurymaking use of the most powerfulmuscles in the body. Ninety- five percent of the exertion put into pedal power is converted into energy. Pedal power can be applied to a wide range of jobs and is a simple, cheap, and convenient source of energy. However, human kinetic energy can be usefulin a numberof ways but it can also be used to generate electricity based on different approaches and many organizations are already implementing human powered technologies to generate electricity to power small electronic appliances. The walking charger provides the power solution, it gives people the ability to charge their mobile device batteries anytime anywhere from their own walking. They can become their own personalpower source. So now when you go out for a walk you can keep your self healthy as well as your phone battery too. We will able to save 1 billion KWH energy per year which is used up in charging phone worldwide.
  4. 4. PAGE 3 METHODOLOGY In this Electrical Power Generation Using Foot Steps Project, we are generating electrical power as non-conventional method by simply walking or running on the footstep. For this purpose, piezoelectric sensor is used in order to measure force, pressure and acceleration by its change into electric signals. A piezoelectric sensor is an electric device which is used to measure acceleration, pressure, or force to convert them to an electric signal. These sensors are mainly used for process control, qualityassurance, research and development in various industries. The applications of this sensor involve, aerospace, medical, instrumentation, and as a pressure sensor it is used in the touch pad of mobile phones. In the automotive industry, these sensors are used to monitor ignition when developing internal burning engines. Two technologies have been tested so far to convert energy used in walking into electrical power. 1: Uses of piezoelectric material. 2: Placing small electro-mechanicaldevices, such as a dynamo. The mechanism involves three basicstages: 1 Conversion of mechanical to electrical energy 2 Storing the electrical energy 3 Using this energy to charge mobile phone
  5. 5. PAGE 4 BLOCK DIAGRAM The complete diagram of the foot step power generation is given below. Only one step is inclined in certain small angle which is used to generate the power. The pushing power is converted into electrical energy by proper driving arrangement. The rack & pinion, spring arrangement is fixed at the inclined step. The spring issued to return the inclined step in same position by releasing the load. The pinion shaft is connected to the supporterby end bearings as shown in fig. The larger sprocket also coupled with the pinion shaft, so that it is running the same speed of pinion. The larger sprocket is coupled to the small cycle sprocket with the help of chain (cycle). This larger sprocket is used to transfer the rotation force to the smaller sprocket. The smaller sprocket is running same direction for the forward and rev ersedirection of rotational movement of the larger sprocket. This action locks like a cycle pedaling action. The fly wheel and gear wheel is also coupled to the smaller sprocket shaft. The flywheel is used to increase the rpm of the smaller sprocket shaft. The gear wheel is coupled to the generator shaft with the help of another gear wheel. The generator is used here, is permanent magnet D.C generator. The generated voltage is 12Volt D.C .This D.C voltage is stored to the Lead- acid 12 Volt battery. The batteryis connected to the inverter. This inverter is used to convert the 12Volt D.C to the 230 Volt A.C. This working principle is already explained the above chapter. This 230 Volt A.C voltage is used to activate the light, fan and etc. By increasing the capacityof battery and inverter circuit, the power rating is increased. This arrangement is fitted in shopping complex,
  6. 6. PAGE 5 college and wherever the large people walking on the footsteps simultaneously. Using piezoelectricmaterial A piezoelectric sensor is a device that uses the piezoelectric effect to measure pressure, acceleration, strain or force by converting them to an electrical signal. Piezoelectric material is a material that produce electricity when we apply mechanical stress. A piezoelectric sensor is a device that uses the piezoelectric effect to measure pressure, acceleration, strain or force by converting them to an electrical signal. Piezoelectric sensors have proven to be versatile tools for the measurement of various processes
  7. 7. PAGE 6 WORKING The pushing power is converted into electricity. Whenever force is applied on piezoelectric crystalthat force is converted to electrical energy. It can be used for basic purpose like charging mobile phone, torch. They generate electricity when they are compressing. So, when we press them while walking or running they start acting like a tiny battery. We can store it in a battery and used later in other purpose. we can take advantage of this special property by putting piezo elements underneath our feet in such a way that every time we take a step, we are using our weight to push on the piezo electric elements- which then in turn convert that energy into electricity. The only issue with this, however is that we need DC, not AC in order to power our stuff. We can solve this problem by creating a bridge rectifier with diodes to convert the AC power to DC power we can use. BLOCK DIAGRAM
  8. 8. PAGE 7 Placing small electromechanical devices, such as a dynamo Dynamos convert mechanical rotation into electric power. Dynamo - a device that makes direct current electric power using electromagnetism. A dynamo is an electrical generator that creates direct current using a commutator. Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based, including the electric motor, the alternating-current alternator, and the rotary converter. Today, the simpler alternator dominates large scale power generation, for efficiency, reliability and cost reasons. A dynamo has the disadvantages of a mechanical commutator. Also, converting alternating to direct current using power rectification devices (such as vacuum tubes or more recently via solid state technology) is effective and usually economical. The word dynamo (from the Greek word dynamis (δύναμις), meaning force or power) was originally another name for an electrical generator, and still has some regional usage as a replacement for the word generator. The word "dynamo" was coined in 1831 by Michael Faraday, who utilized his invention toward making many discoveries in electricity(Faraday discovered electrical induction) and magnetism.
  9. 9. PAGE 8 WORKING This device has to be worn below the knee cap on one leg and a light string is attached to the other leg. The strides taken help in pulling and retracting the string, which is further attached to a dynamo that generates about 3.5 Watts; enough to charge low-. powered electrical generator to leg movements. When the person extends the gap between the legs, power is generated by a gear that turns and spins the generator. The flexion of the leg turns off the gear so as not to discomfort the person. Walking involves a change in relative displacement of around ?35 cm between legs. This repeated linear motion could be converted to rotary motion with the help of a pulley and string. Thus, the bio-mechanical work is converted into mechanical form and eventually stored as chemical energy in batteries to store electric energy. The device is clamped on one leg and a hole lets out a string that is attached to the other leg that helps in the conversion of the displacement into rotary motion
  10. 10. PAGE 9 Even a slight displacement pulls the string out, therebyrotating the pulley, which turns the central shaft. The shaft is common to the gearbox, the dynamo and the recoil mechanism. So, when the displacement reduces, there is a slack in the string, which is removed by the tension produced by the recoil system. Since the electricity produced is bi-directional and contains spikes, an electronic circuit encompassing a rectifier and a filter converts it into a unidirectional, spike-free wave and stores the energy produced in rechargeable batteries. This stored energy is used as an input supplyto mobiles with the help of different adapters. This new device is motion sensitive, being auto-activated byleg movements and it does not increase the energy spent with walking. IMPORTANT QUESTION Storing the electrical energy: Since the electricity produced is bi-directional and contains spikes, an electronic circuit encompassing a rectifier and a filter converts it into a unidirectional, spike-free wave and stores the energy produced in rechargeable batteries. This stored energy is used as an input supplyto mobiles How many steps do we need to take to completely charge the mobile? Three to four thousand steps or a 5-6 km walk can generate enough electricity to charge the mobile twice. Charge also depends on body weight. Body weight is directly responsible for the amount of pressure on the crystals. If the pressure is higher, the electricity generated is more.
  11. 11. PAGE 10 How much powerdoes it save? Power saved per full charge is equivalent to the power consumed by a 50-Watt bulb in an hour. The power generated by this device is eco-friendly, as the only input is pressure of human feet. There is no manufacturing needed because plates already available in the market are used. Also, the power thus produced does not generate any heat. MERITS AND DEMERITS MERITS  Power generation is simply walking on the step  Power also generated by running or exercising on the step.  No need fuel input  This is a Non-conventional system  Battery is used to store the generated power
  12. 12. PAGE 11 DEMERITS  Only applicable for the particular place.  Mechanical moving parts is high  Initial cost of this arrangement is high.  Care should be taken for batteries ADVANTAGES and FUTUREPROSPECTIVES: Increasing the effectiveness of mobiles in rural India by providing a portable means of charging of mobiles, torches, radios. Helping military personnel charge their GPS devices and other low-power electronic gadgets while on the move. Providing an alternate means to wall-based charging for MP3 players, mobiles, etc in cities, thereby, helping today?s fast generation to move faster without mobile batteryproblems. India has signed the Kyoto Protocol ? an acknowledgement that we share the concern of global warming, which also expresses our commitment to slow down climate change. Walk-N-Charge would just add to the efforts put in by India in various innovative ways. Charging your cell phone might soon be as simple as taking a walk around the block.
  13. 13. PAGE 12 CONCLUSION • The project Footstep Power Generation uses the footstep to produce electricity. It is one of the best economical and affordable energy solution to the common people. • This can be used for many application in rural areas where power availability is less or totally absent. As India is and developing nation where energy management is big challenge for such a huge population. • Even if 0.1% of the Indian population uses this device, it can to help reduce carbon emission by 2.25 tones per day. • This is a Non-conventional system • Eco friendly • Cheaper than solar system

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