1 / 20

ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors Piezo Vibration Sensor

ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors Piezo Vibration Sensor. Prepared by: Gustavo Estrada Dept. of Electrical and Computer Engineering Utah State University (435)797-3054 (ECE Dept.). 3/11/2010. Outline . Reference list To probe further Major applications

wes
Download Presentation

ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors Piezo Vibration Sensor

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ECE5320 MechatronicsAssignment#01: Literature Survey on Sensors Piezo Vibration Sensor Prepared by: Gustavo Estrada Dept. of Electrical and Computer Engineering Utah State University (435)797-3054 (ECE Dept.) 3/11/2010

  2. Outline • Reference list • To probe further • Major applications • Basic working principle illustrated • A typical sample configuration in application (application notes) • Major specifications • Limitations • And many more relevant issues in applications (such as, how to choose, cost information, where to buy etc.) ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  3. Reference List • A piezoelectric vibration based generator for wireless electronics http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf • Piezoelectric vibration sensor by Yoshiaki Ohbayashi et al http://www.google.com/patents/about?id=bDKSAAAAEBAJ&dq=piezoelectric+vibration+sensor ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  4. Major Applications • Used in measuring vibrations in various apparatuses such as electric, electronic, instrumental, medical, scientific, mechanical, and in a pedometer or the like • Used as generator in wireless electronics • Used in measuring acceleration, velocity and displacement • Used to measure vibrations at a high precision level ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  5. Basic Working Principal • A piezoelectric vibration sensor may work as a generator. • The piezoelectric vibration sensor converts mechanical energy into electrical energy. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  6. Piezo Vibration Sensor Skematic The skematic shows a doble piezo blade. However The designs may vary, single or doble piezo blade Figure from: http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  7. Generator Configuration • A piezoelectric vibration sensor is used as generator in communications (wireless) ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  8. Typical Sample Principal A generator prototype used for testing Diagram from: http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  9. Generator Diagram Figure from: http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  10. Major Especifications • Efective energy density • Size • Design • Circuit Model • Resons for Design ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  11. Efective Energy Density Diagram from: http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  12. Energy Density Parameters • σy is the yield stress • k is the coupling coefficient • c is the elastic constant • B is the magnetic field • μ0 is the permeability of free space • ε0 is the permittivity of free space • and E is the electric field ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  13. Testing Results of a Prototype Graph from: http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  14. Testing Results Graph from: http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  15. Size • Size constraints play an important role in selecting a power converter configuration. For this reason it is necessary to specify the general size at the outset. While the model developed holds for any size, if a generator an order of magnitude larger or smaller were desired, a different design configuration may be preferred. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  16. Design • A two-layer bender mounted as a cantilever • S is strain • V is voltage • M is mass • z is vertical displacement. Figure from: http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  17. Circuit Model Figure from: http://iopscience.iop.org/0964-1726/13/5/018/pdf/0964-1726_13_5_018.pdf ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  18. Reasons for Design • First, for a given force input, the cantilever configuration results in the highest average strain, and the power output is closely related to the average strain developed in the bender. • Second, the cantilever mounting results in the lowest resonance frequency for a given size, which is important because the target input vibrations are low frequency (60–200 Hz). ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  19. Limitations • The piezoelectric vibration sensor is limited to use where mechanical energy (vibration) is abalible. • In some applications, such as wireless, the sensors are limited to sizes due to constant demand of reduction in size by industry. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  20. Useful Links for Shopping • Sparkfun Electronics provides a range of sizes and prices for piezoelectric vibration sensors. See links below to view different sensor options • http://www.google.com/patents/about?id=bDKSAAAAEBAJ&dq=piezoelectric+vibration+sensor • http://www.junetrading.com/product_info.php?products_id=5616 • Digikey corporations is another good source to porchase this sensors • http://parts.digikey.com/1/parts/945405-sensor-piezo-film-vibra-mass-0-1005447-1.html ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

More Related