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P10010: MSD I-Detail Design Review Motion Tracking Technology Evaluation Motion Tracking Technology Evaluation1 http://www.wildgenius.com/images/motion-capture.jpg

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Core Team & Roles David Monahan- Project Manager (ME) Brian Glod- Data Lead (CE) Assis Ngolo Communication Lead (CE) Jahanavi Gauthaman- Sensor Technology Lead (EE) Cory Laudenslager- Sensor- MCU Interface Lead (EE) James Stern- Sensor- Human Interface Lead (ME) Motion Tracking Technology Evaluation2

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Assistive Devices Family Motion Tracking Technology Evaluation3

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P10010 Mission Statement To research sensors and implementation methods for portable motion tracking systems capable of measuring patients' range of motion in their natural environments. The primary ranges of motion of interest: Motion of a human limb, where a limb is defined as a 3-bar linkage, for example: upper leg, lower leg, and foot. Motion of a human's lower back, where lower back is defined as the lumbar region, with 3 points of contact: sacrum, L1-L2, L3-L5. Motion Tracking Technology Evaluation4

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Project Deliverables Design concepts ranked according to customer needs for use by future MSD projects. Analysis of possible solutions for: Sensors, MCUs, ICs, circuitry, communication devices. Work with P10011 to research compatible enclosures for the system. Testing methods/ fixtures to test future systems. Test several prototype sensors and systems (MSDII) Motion Tracking Technology Evaluation5

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Customer Needs 6

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Customer Needs (contd.) 7

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Customer Needs II P10011 Motion Tracking Technology Evaluation8 Need #CategoryImportanceDescription Body Part Addressed by Spec # CNAP100111 Keep each group informed of progres: Each group should understand what the other group is doing, and know how they plan to continue their projectsBothE22 CNBP100111 Design for multiple sensors: Need to know if there is a need to design around multiple types of sensorsBothE22 CNCP100112 Location of sensors: Need a list of appropriate placement of sensors on body to adhere to comfort styles of each part of the body affectedBothE22 CNDP100111 Accuracy of Sensors: Need to know what degree the enclosure can affect the sensor reading and still allow the system to generate meaningful dataBothE25 CNEP100111 Durability: Need to know how well the sensor modules need to be protected by enclosures and how much impact the enclosure must ablate to protect the sensorBoth? CNFP100112 Size: Need a list of sizes of sensor units involved to design enclosures they will fit inBothE3 CNGP100112 Weight: Need to know approximate or worst case scenario weight to know the maximum weight enclosures can add to systemBothE9, E12

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Target Customer Specifications Motion Tracking Technology Evaluation9

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Target Customer Specifications (contd.) Motion Tracking Technology Evaluation10

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System Overview Motion Tracking Technology Evaluation11 Human Interface (P10011) Sensors Interface Circuitry Microcontrolle r Unit Communication Interface Analog-to-Digital Conversion Active Filtering Signal Amplification Storage Interface [ www.serverlab.net ] [ www.laptoping.com ]

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Motion Tracking Technology Evaluation12

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Sensor Feasibility Overview Motion Tracking Technology Evaluation13 Spec Number Customer Need Design SpecificationUnitsIdeal Value Flex Sensor Rank (1-10) LIS302DL Digital Output Accelorometer Rank (1-10) Tilt Sensor IMU Board Rank (1-10) DE-ACCM3D2 Accelorometer Rank (1-10) Atomic IMU - 6DoF Rank (1-10) Razor IMU - 6DoF Rank (1-10) 1CN14AccuracyDegrees1 10%7 7 7 7 7 7 2CN16RangeDegrees18090618010180 101808 10 18010 3CN6Size of Sensormm x mm x mm30x30x154.5x3x593X5X11025X20.4X2 1021 x 10x 810 47 x 37 x 25 4 17.5 x 15 x110 4CN13Degrees of FreedomAxis315392 639 6 10 6 7CN3Input VoltageV95V10Digital (2.1-3.6)105 3.5 to 15V (onboard regulator) 2.4 to 3.6 (no onboard regulator)10 3.4-10 10 2.7-3.610 CN3Output VoltageV3-52.8-410Digital102.5 101.5-2.4103.3103.3 10 CN21Set-up TimeMinutes105 158 8 8 8 8 12CN7Weight of Sensorsg105g102 2 1.310 15 6 410 17CN7 Comfort of Sensors on PersonSubjectiveHigh 8 10High 10High10 Low 6 High10 19CN28Patient SafetySubjective Patient is Safe Safe8 10 Safe10Safe10Safe10Safe 10 20 CostDollars 10 1255Medium ($35)8 125 5 89.956 RANK 93 104 96 100 86 101

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Resistive Response Flex Sensor Motion Tracking Technology Evaluation14 http://blog.bioethics.net/spine.gif; http://mech207.engr.scu.edu/SensorPresentations/Jan%20-%20Flex%20Sensor%20Combined.pdf; devices.sapp.org/component/flex/

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How Position Sensors work (example) Motion Tracking Technology Evaluation15

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DE-ACCM3D2 Buffered 2g Tri-axis Accelerometer 3 axis output in the x, y, and z Sensitive (up to 720 mV/g) Low power, input voltage, and low current draw Light weight and small Voltage regulator Short protection Limitation: stand-alone accelerometer Motion Tracking Technology Evaluation16 http://www.dimensionengineering.com/datasheets/DE-ACCM3D2.pdf

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LIS302DL Smart Digital Output Piccolo Accelerometer 2.16 V to 3.6 V supply voltage

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Tilt Sensor IMU Board Gyro and Tilt sensor Low Voltage Operation: 5V Regulated Highly Accurate/High Sensitivity Rated Analog Output Self Test For Both Sensors Small and light weight Cost: $125.00 Limitations: High cost; Only 2 axis Motion Tracking Technology Evaluation18

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