ECE5320 Mechatronics Assignment#01: Literature Survey on Sensors and Actuators Topic: Accelerometers as a SensorOutlineReference listReference list (Continued)Slide 5To explore furtherTo explore further (Continued)Major applicationsPractical ApplicationsPractical Applications (Continued)Types of AccelerometersTypes of Accelerometers (Continued)How does an Accelerometer work?Slide 14Slide 15Slide 16An Example of Accelerometer usageAn Example of Accelerometer UsageConsiderations for UseConsiderations for Use (Continued)Considerations for Use (Continued)Where to buySome Distributors selling AccelerometersAccelerometer CostECE5320 MechatronicsAssignment#01: Literature Survey on Sensors and Actuators Assignment#01: Literature Survey on Sensors and Actuators Topic: Accelerometers as a SensorPrepared by:Curtis J. OstranderDept. of Electrical and Computer Engineering Utah State UniversityE: [email protected] ; T: (435)797-; F: (435)797-3054 (ECE Dept.)W: http://3/7/200801/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-2Outline –Reference list–To probe further–Major Applications–Practical Applications–Types of Accelerometers–How does an Accelerometer work?–An Example of Accelerometer usage.–Considerations (Specifications/Limitations)–Where to buy.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-3Reference list•http://en.wikipedia.org/wiki/Accelerometer•http://www.sensorsportal.com/HTML/SENSORS/Accelerometers.htm•http://www.dimensionengineering.com/accelerometers.htm•http://www2.usfirst.org/2005comp/Manuals/Acceler1.pdf•http://en.wikipedia.org/wiki/Inertial_navigation01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-4Reference list (Continued)•http://wiki.openmoko.org/wiki/Technical:Accelerometer_Fundamentals•http://www.ri.cmu.edu/pub_files/pub2/luo_hao_2000_1/luo_hao_2000_1.pdf•http://zone.ni.com/devzone/cda/ph/p/id/106•http://content.honeywell.com/sensing/sensotec/accelerometer_faq.asp•http://www.vibrametrics.com/index.aspx?go=resources&focus=Users%20Manual.htm01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-5Reference list (Continued)•http://engenius.wordpress.com/2007/10/03/types-of-available-accelerometers/•http://sensors-transducers.globalspec.com/LearnMore/Sensors_Transducers_Detectors/Acceleration_Vibration_Sensing/Accelerometers•http://www.freescale.com/webapp/sps/site/overview.jsp?nodeId=011269111801/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-6To explore further •To Explore Inertial Navigation refer to http://en.wikipedia.org/wiki/Inertial_navigation•To Explore Accelerometers refer to http://en.wikipedia.org/wiki/Accelerometer and http://www.sensorsportal.com/HTML/SENSORS/Accelerometers.htm•To understand how accelerometers work refer to http://www.dimensionengineering.com/accelerometers.htm01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-7To explore further (Continued)•For a practical guide to Accelerometers refer to http://www.sensr.com/pdf/practical-guide-to-accelerometers.pdf•For Articles, Papers, and References refer to http://www.sensorsportal.com/HTML/SENSORS/Accelerometers.htm•To understand how accelerometers work refer to http://www.dimensionengineering.com/accelerometers.htm and also to http://en.wikipedia.org/wiki/Accelerometer01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-8Major applications •Measure acceleration of an object, both static and dynamic.•Measure tilt of an object.•Measure shock to, and vibration from an object.•Measure an objects orientation.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-9Practical Applications •Inertial Navigation Systems•Evaluation of Automotive systems such as Engine Performance, Drive Train Performance, and Braking Performance.•Deployment of the Airbag in automobiles.•Measurement of geological occurrences such as earthquakes or volcanic activity.•Gaming systems such as the Wii by Nintendo.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-10Practical Applications (Continued) •Monitoring machinery such as pumps, fans, compressors.•Monitoring the structural integrity of a building.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-11Types of Accelerometers •The Capacitive Accelerometer – Electrical capacitance changes with acceleration.•The Piezoelectric Accelerometer – Generates an electric potential from applied stress.•The Piezoresistive Accelerometer – Electrical resistance changes from applied stress.•Hall Effect Accelerometer – Varies voltage output with changes in the magnetic field surrounding the accelerometer.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-12Types of Accelerometers (Continued)•The Magnetoresistive Accelerometer – Resistance varies with changes in the magnetic field surrounding the accelerometer.•Heat Transfer Accelerometers – Internal heat transfer changes with acceleration.•MEMS-Based Accelerometers – Micro Electro-Mechanical Systems measure acceleration by deflection of a proof mass from it’s resting position.01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-13How does an Accelerometer work?Capacitive Accelerometers use a spring mass system. A known mass, or proof mass, is connectedto a plate of a capacitor and is allowed to move with acceleration.The movement changes the internalcapacitance of the accelerometer.Image copied from http://www.ri.cmu.edu/pub_files/pub2/luo_hao_2000_1/luo_hao_2000_1.pdf01/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-14How does an Accelerometer work?Piezoelectric accelerometers use the piezoelectric effect of crystals to measure acceleration. As accelerationincreases a small voltage isgenerated by the compressionof the crystal.Image copied from http://content.honeywell.com/sensing/sensotec/accelerometer_faq.asp?category=101/14/19ECE5320 Mechatronics. Assignment#1 Survey on sensors and actuatorsSlide-15How does an Accelerometer work?Piezoresistive accelerometersuse the piezoelectric effect tomeasure changes in resistanceof the crystal to compressiondue to acceleration.Image copied from
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