Published on February 17, 2014
ELECTRONIC NOSE BITS Pilani Hyderabad Campus Mayank Garg 2013H140040H Embedded System BITS-Pilani, Hyderabad Campus
CONTENTS HISTORY OF E-NOSE INTRODUCTION OF E- NOSE TYPES OF E- NOSE COMPONENT OF E-NOSE EXPERIMENTAL SETUP SENSOR TYPES OF SENSORS APPLICATIONS ADVANTAGES FUTURE SCOPE CONCLUSION Mayank Garg Slide 2 BITS Pilani, Hyderabad Campus
HISTORY OF E-NOSE First appeared in a paper by Persuade and Dodd (1982). The E-nose was developed on 19th august 2008. Mayank Garg Slide 3 BITS Pilani, Hyderabad Campus
ELECTRONIC NOSE E-NOSE is a device that identifies the specific components of an odour & analyses its chemical makeup to identify it. • Details of assignments and project will be announced in the class & on course web page. • 5 Assignments – best 4 will be considered for final grading; mix of theoretical (paper presentation) and practical – with Demo • Project involves three demos (1) feasibility (2) proof of concept (3) Complete demo with weightage of 4%, 7% and 9% respectively. Mayank Garg Slide 4 BITS Pilani, Hyderabad Campus
TYPES OF E-NOSE S. O. D. system E-NOSE M.F.S. E-NOSE Mayank Garg Slide 5 BITS Pilani, Hyderabad Campus
COMPONENTS OF E-NOSE SAMPLE DELIVERY SYSTEM DETECTION SYSTEM COMPUTING SYSTEM Mayank Garg Slide 6 BITS Pilani, Hyderabad Campus
Mayank Garg Slide 7 BITS Pilani, Hyderabad Campus
EXPERIMENTAL SETUP Network Analyzer Mass Flow Controller PC Switching Box Nitrogen VOC Sensor Cell VOC in bubbler Mayank Garg Slide 8 BITS Pilani, Hyderabad Campus
EXPERIMENTAL SETUP Network Analyzer Mayank Garg Slide 9 BITS Pilani, Hyderabad Campus
SENSOR Mayank Garg Slide 10 BITS Pilani, Hyderabad Campus
TYPES OF SENSORS A sensor is a device which can respond to some properties of the environment and transform the response into an electric signal. Mayank Garg Slide 11 BITS Pilani, Hyderabad Campus
CONDUCTIVITY SENSORS Exhibit a property of change when exposed to volatile compounds. Mayank Garg Slide 12 BITS Pilani, Hyderabad Campus
PIEZO ELECTRIC SENSORS 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, they are configured as mass-change sensing device. Mayank Garg Slide 13 BITS Pilani, Hyderabad Campus
A) QCM SENSOR: The QCM sensor consists of a resonating disk a few millimeters in diameter, with metal electrodes on each side connected to dead wise. The device resonate at a characteristic frequency (10MHz to 30MHz) when excited with an oscillating signal. Mayank Garg Slide 14 BITS Pilani, Hyderabad Campus
B) SAW Sensor: • In SAW sensor a Surface wave travels over the surface of the device; not throughout its volume. • SAW sensors operate at much higher frequencies, and so can generate a larger change in frequency. Mayank Garg Slide 15 BITS Pilani, Hyderabad Campus
MOSFET SENSORS MOSFET odour sensing device are based on the principle that VOCs in contact with a catalytic metal can produce a reaction in the metal and the reaction’s products can diffuse through the gate of the MOSFET to change the electrical properties of the device. Mayank Garg Slide 16 BITS Pilani, Hyderabad Campus
OPTICAL SENSOR Mayank Garg Slide 17 BITS Pilani, Hyderabad Campus
HUMAN OLFACTORY SYSTEM Mayank Garg Slide 18 BITS Pilani, Hyderabad Campus
ARTIFICIAL OLFACTORY SYSTEM Computer Odour Sensor Array QCM Mayank Garg Odour Extraction Pattern Recognition Slide 19 Information BITS Pilani, Hyderabad Campus
ANALOGY BETWEEN E-NOSE & BIOLOGICAL NOSE Mayank Garg Slide 20 BITS Pilani, Hyderabad Campus
E-NOSE INSTRUMENTATION Mayank Garg Slide 21 BITS Pilani, Hyderabad Campus
APPLICATIONS OF E-NOSE Mayank Garg Slide 22 BITS Pilani, Hyderabad Campus
ADVANTAGES Mayank Garg Slide 23 BITS Pilani, Hyderabad Campus
COST OF E-NOSE TIME DELAY OF E- NOSE Mayank Garg BITS Pilani, Hyderabad Campus
Mayank Garg Slide 25 BITS Pilani, Hyderabad Campus
Mayank Garg Slide 26 BITS Pilani, Hyderabad Campus
Mayank Garg Slide 27 BITS Pilani, Hyderabad Campus
Thank You!! Mayank Garg Slide 28 BITS Pilani, Hyderabad Campus
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