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Power Generation Using P iezoelectric Devices

Power Generation Using P iezoelectric Devices. Mitsuki Tsuboo Daisuke Hamazaki Yuki Funazawa Kyosuke Horiuchi. What Is a Piezoelectric Device?. ・ Piezo electricity (a phenomenon of electricity caused by pressure or vibration) ・ Piezoelectric device (PD)

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Power Generation Using P iezoelectric Devices

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  1. PowerGenerationUsingPiezoelectric Devices MitsukiTsuboo Daisuke Hamazaki Yuki Funazawa KyosukeHoriuchi

  2. What Is a Piezoelectric Device? ・Piezoelectricity (a phenomenon of electricity caused by pressure or vibration) ・Piezoelectric device (PD) (a machine that responds to stress or vibration) ・Dimensions (35 x 35 x 0.53 mm) ・Structure (positive ions are located in the center of lattice) ・Abilities (when impacted, it generates an AC voltage, in contrast , when subjected to an AC voltage, it vibrates slightly)

  3. Research Instruments

  4. How on Earth Did We Come Across PDs?

  5. Power Problems On March 11th, 2011, a powerful earthquake struck Tohoku, which created secondary disasters. Some of them were power shortages and radioactive contamination, or power problems. We got interested in the problem and decided to find the solution. Thermal power generation %

  6. Alternative Energy A thermal power station can generate a huge amount of electric energy in a day. It’s about… 1.3 x 1014 [J] To produce as much electric energy as a thermal power station can generate in a day, you have to press a PD with your finger… 100,000,000,000,000,000,000 times. !!! Solution • Solar energy • Wind energy • Vibrational energy • Geothermal energy • Biomass energy

  7. Outline Confirm a PD’s performance in our experiment by drop test Drop Test See if the PD allows DC or AC to flow DC / AC Create three types of circuits and examine which is the best The Best Circuit

  8. Experiment 1 ~The Relationship Between Height and Voltage~

  9. Drop Test (50 [mm] = 2.0 [in] ) This machine dropped a small ball on a PD from a height of 50mm or 100mm and an oscilloscope measured generated voltage. Drop Machine

  10. Results and Discussion Trial : 40 [times] Average time : 4.5 [ms] The higher the ball fell from the ground, the higher voltage it made. Although the height was doubled from 50mm to 100mm, voltage did not double. This was caused by the deformation ability of the PD.

  11. Now the PDs only have to be connected…? What’s wrong?

  12. Experiment 2 ~Can AC / DC flow through the PD?~

  13. PD AC / DC Ammeter Rectifier We connected a power source, a PD and an electric music box in a series circuit. And we changed power source to DC or AC. … considered sounding showed current flowing

  14. Results and Discussion Simultaneously In case of DC, The DC circuit didn’t send current. However, it sent current only when it was pushed. But… In case of AC, The AC circuit was allowed to flow into the PD without Pushing it. But... ■　Associated wave

  15. Experiment 3 ~The Best Way to Connect them?~

  16. The Best Circuit Type 1 D-1, R-1 Type 2 D-2, R-1 As a control, we built circuit 1 and ones which had one more PD. Then we examined what kind of circuit is better to generate more electric current than that in circuit 1. Type 3 D-2, R-1 Type 4 D-2, R-2 Precondition ・Eventually convert AC into DC ・Push them simultaneously ・Connect PDs in parallel D (PD) R (rectifier)

  17. Results The best ways to connect are type 2 and type 4. But…

  18. Connection Problems In case of type 2, The more PDs are installed, the more difficult it is to push them simultaneously. In case of type 4, We require the same number of rectifiers as PDs. Simultaneously

  19. Summary ・The higher pressure that is applied to PDs, the higher voltage they generate. ・The generated voltage is not in direct proportion to pressure. ・To convert stress to electric energy efficiently, we need to develop an idea for how the PDs can be pushed or have the same number of devices and rectifiers in the circuit.

  20. Next Plan More Tries Moderate Pressure Different Method ・More tries ・A large volume of data What is the shape of the graph in experiment 1? Is there another effective method? Practical Use We tried setting PDs on a slipper… Push them simultaneously! Our expectation Require many rectifiers! Dropped from 100 mm PD ? Another different idea? Two PDs connected in series and pushed them simultaneously Ten PDs connected in series and installed a diode

  21. Thank You for Listening

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