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Prepared by: Rakesh Reddy Nagilla Dept. of Electrical and Computer Engineering

ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic Sensor Actuators and their applications. Prepared by: Rakesh Reddy Nagilla Dept. of Electrical and Computer Engineering Utah State University Email:rakeshrn@cc.usu.edu F: (435)797-3054 (ECE Dept.).

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Prepared by: Rakesh Reddy Nagilla Dept. of Electrical and Computer Engineering

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  1. ECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators TopicSensor Actuators and their applications Prepared by: Rakesh Reddy Nagilla Dept. of Electrical and Computer Engineering Utah State University Email:rakeshrn@cc.usu.edu F: (435)797-3054 (ECE Dept.)

  2. Sensor Outline • Introduction • Background • Basic working principle illustrated • Major specifications • Advantages • Application • Where to Buy • Conclusion • References ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  3. Introduction Polymers • Combination of monomers in a regular pattern. • Two types of conducting ions: 1)Complexes of inorganic salts & a polymer. 2)Polymer electrolytes comprising polymer cation & anion with its counter ions. • Used to fabricate humidity sensors. • Also used to fabricate gas sensors. • Thin polymer layers are used in many industrial applications. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  4. Background Why use polymers ? • Have strong acidic and basic groups. • These groups easily absorb water molecules. • Decreases electrical resistance. • Properties can be used to detect Humidity. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  5. Ultra thin molecularly imprinted polymer sensorsAn ultrathin novel nanosensor (31.5 ± 4.1 nm thick in the absence of analytes), employing a molecularly imprinted polymer as a recognition element for cholesterol and gold nanoparticle enhanced transmission surface plasmon resonance spectroscopy for detection, was constructed. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  6. Conducting polymer sensors for home • Conducting polymers exhibit a wide range of tunable properties that make them ideal for use as sensors. • Examples: chemical, mechanical, optical, thermal, acoustic, and electrical sensors. • Most of these sensor modalities involve changes in the electronic structure of the polymer. • The changes result from chemical, mechanical, optical, thermal and acoustic stimuli. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  7. Operation • Two important thermal characterization techniques coupled with molecular identification. These techniques allow 1) the determination of the ratios of polymer, solvent and ionic contents; 2) The determination of the glass transition temperatures which are critical for an understanding of mechanical behavior; 3) the investigation of temperatures at which thermal degradation occurs and of the mechanisms associated with this degradation. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  8. Polymer Characterization • It is important to determine relative composition of the phases : 1.Thermal gravimetric analysis (TGA) 2. differential thermal analysis (DTA) 3.Mass spectroscopy (MS) ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  9. Figure Thermal analysis on solvent and ionic components of a polymer ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  10. Intensity of Mass peaks vs Temperature ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  11. Advantages over other sensors Polymer sensors can be effectively used to detect the humidity of the environment. Conducting polymer sensors are used in various daily activities, where the structure of polymer is considered. Features Sensor area 28mm2 Accuracy +/- 2% RH Sensitivity 3000ppm / %RH ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  12. Advantages • Easy to construct and also to operate. • Compatible with other devices. • Scope for more applications. • Can be controlled through the properties of polymers. • The sensor is inexpensive compared to other sensors and easy in construction ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  13. Disadvantages The main disadvantage of the polymer sensors in humidity detection is that, these cannot be used in places of high humidity because of limited capacity. But this can be over come by improving on the properties of the polymers. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  14. Sensor Specifications • Diameter: .018" • Type: Fast Resp. • Time Constant: 200ms (in liquids) ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  15. Applications • Humidity detection : With respect to rapid response and reliability, water-vapor absorbent organics are much better than inorganic materials. The capacity–type thin–film polymer humidity sensors with a rapid response are made by using spin–coated thin film as an absorbent of water vapor, with obliquely deposited metal electrodes. Reliability and stability are improved by exposing the sensors to a moist and highly heated atmosphere. The primary characteristic of the sensors is a rapid response. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  16. Some other Polymer sensors Polymer sensors for nitroaromatic explosives detection Structures of nitroaromatic, nitramine, and nitrate ester explosives. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  17. Conjugated polymers for explosives detection Electron-transfer fluorescence quenching. ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  18. Fluorescent inorganic polymers for redox sensing Quenching efficiency defined by the Stern–Volmer relationship for TNT Quenching efficiencies of polymers ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  19. Where to buy • There are many companies which manufacture polymer sensors. • Some of the websites where the sensor specifications and price are specified • shopping.msn.com/reviews/shp/?itemId=514035227 • http://www.directindustry.com/cat/test-and-measuring-instruments/humidity-measurement-instruments-I-489.html • For further exploration about the sensor and its specifications http://www.vaisala.com/ ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  20. Conclusion • The Polymer sensors are being used for quite a while and they can be used in more day to day uses provided good research work is done on them. Thank You ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  21. References • http://en.wikipedia.org/wiki/Polymer • http://www.polymertraining.com • Polymer sensors and actuators-Yoshitho Osada,Danilo E De Rossi • www.mrs.org/s_mrs/bin.asp?CID=2735&DID=149265&DOC=FILE.PDF • http://www.kcpc.usyd.edu.au/polymers/uses ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

  22. References • http://www.ingentaconnect.com/content/mcb/087/2000/00000020/00000002/art00001 • www.howstuffworks.com • http://ieeexplore.ieee.org ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuators

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