P 13026 PORTABLE VENTILATOR TEAM LEADER DANIEL FENTON
P 13026: PORTABLE VENTILATOR TEAM LEADER: DANIEL FENTON KENNEDY KONG MARIE REVEKANT DAVID ENGELL ERIC WELCH DEREK ZIELINSKI CHRIS FREEMAN MELISSA HARRISON RYAN MUCKEL ROBERTO CASTILLO ZAVALA
ENGINEERING SPECIFICATIONS
PUGH MATRIX MASS FLOW SENSOR
HONEYWELL AWM 2100 V FEATURES • Bidirectional sensing capability • Actual mass air flow sensing • Low differential pressure sensing The AWM 2000 Series microbridge mass airflow sensor is a passive device comprised of two Wheatstone bridges. Data is transmitted via analog.
HONEYWELL AWM 2100 V CONT. Performance Characteristics @ 10. 01 +/- 0. 01 VDC, 25°C Characteristic Value Flow Range (Full Scale) +/- 200 sccm Accuracy 2. 5% Weight 10. 8 g Power Consumption 30 m. V – 50 m. V Sensor Current Max. 0. 6 m. A Response Time 1 msec – 3 msec Temp. Range Oper. -25°C to +85°C Storage: -40°C to +90°C Dimension 31. 5 mm x 54. 4 mm x 15. 5 mm
PUGH MATRIX PRESSURE SENSOR
NPC-1210 -005 -A-1 -L LOW PRESSURE SENSOR Applications: • Medical Equipment • Ventilation • Respirator monitoring Features: • High Sensitivity • High accuracy • CB mountable package • DIP package • Solid-state reliability • Individual device traceability
NPC-1210 -005 -A-1 -L LOW PRESSURE SENSOR Characteristic Value Pressure Range (Full Scale) 5 psi or 351. 6 cm. H 2 O To 15 psi or 1054. 8 cm. H 20 Accuracy . 5% Weight 2. 5 g Temp. Range Oper. -40°C to +125°C Storage: -55°C to +150°C Dimension 15. 24 mm x 4. 2 mm Output Type Analog
PUGH MATRIX CONTROL SYSTEM
FEATURE ANALYSIS 10 low-power modes to provide power optimization based on application requirements Allows different power states while being powered on. • Standby state if the device is not running the ventilation cycle • General-purpose input/output Allows sensors with analog outputs to communicate through common digital logic Two 16 -bit SAR ADCs • We might be able to use these to read from the analog sensors. • 16 bit resolution is pretty good Programmable gain amplifier (PGA) • Similar to an OP AMP circuit, this would control the gain digitally. Two I 2 C modules • Some of the sensors have I 2 C output Storage Features • This has a SD card controller so it can write to data to SDHC (High capacity SD cards) devices.
PUGH MATRIX PUMP
PUGH MATRIX PUMP SELECTION
PARKER T 1 -1 HD-121 NEA Peak Flow = 32. 5* LPM 12 VDC Weight = 1. 5 kg Pump Life = 3500 hours 16. 5 x 7 x 9. 9 cm (6. 5 x 2. 75 x 3. 91 in)
TUBING HEAD LOSS ANALYSIS (BETWEEN PUMP OUTLET AND VENTILATOR OUTLET) Bernouli’s Equation Assumptions • Constant velocity, height and air density Major Head Loss: • Dependent on length of tube between ventilator and pump exit Minor Head Loss • Dependent on the expansion and contraction for two T-joints
PUMP HEAT GENERATION Pump Power Consumption • Obtained from pump specs: 20 W at 11. 1 V and 1 psi Overall Pump Efficiency • Obtained from pump specs • Some input power goes into vibration, heat generation and sound Heat Generation Calculation • Done for worst case scenario • • No vibration or sound (i. e. all wasted energy goes into heat generation) Done with a factor of safety of 1. 5 (i. e. Power = 30 W instead of 20)
PUGH MATRIX LITHIUM ION BATTERY
Powerizer 18650 • • • 12 V LI-ION 77 WH 1. 5 LBS. 5" X 3. 1" X 1. 7" (26. 35 IN 3 ) BUILT IN CHARGING PORT, PREVENTS OVERCHARGING COMES WITH 100 V-240 VAC CHARGER LOW BATTERY AUDIBLE ALERT PRICE: $125, EXC. TAX & SHIPPING LEAD TIME: 5 DAYS
Power. Stream PST-MP 3500 -I • • • 12 V, 5 V Li-Ion 60 Wh < 1 lb. 3. 3" x 6. 8" x 0. 9" (20. 2 in 3) Built in charging port, prevents overcharging Comes with 90 -240 VAC charger, can also be charged with 9 -24 VDC Low battery audible alert Price: $200, inc. tax & shipping Lead time: ?
POWER FLOW
FEASIBILITY Current (A) Voltage (V) Power (W) Pump 3. 8 12 45. 6 MCU (MK 60 N 512 VMD 100) 0. 185 3. 8 0. 703 Truly 3. 2" LCD (TFT 240320286 -E) 0. 0208 3. 3 0. 298 Total 4. 0058 46. 6 Battery Voltage (V) 12 Battery Capacity (Ah) 5 Battery Capacity (Wh) 60 Expected Battery Life (Hours) 1. 29
PUGH MATRIX USER CONTROLS
PUGH MATRIX USER INTERFACE
13 PRINCIPLES OF DISPLAY DESIGN 1. Make displays legible (or audible) 2. Avoid absolute judgment limits 3. Top-down processing 4. Redundancy gain 5. Discriminability 6. Pictorial Realism 7. Moving Part (compatibility) 8. Information access cost 9. Proximity Compatibility 10. Multiple resources 11. Predictive aiding 12. Knowledge in the world 13. Consistency Perceptual Principles Mental Model Principles based on Attention Memory Principles
MAKE DISPLAYS LEGIBLE (AUDIBLE) MEDIRESP III PROTOTYPE Values that are set are not readable Values will be shown as figures (digital) Alarm beep without verbal instructions CPR instruction will be audible Ability for confusion with setting (breaths/minutes and liters/breath) Scales for knobs are not readable Gradient of any knob will be labeled (color, graphic)
AVOID ABSOLUTE JUDGMENTS MEDIREP III PROTOTYPE Confusion for scales of knobs- begins and ends at “ 0”? Gradient of any knob will be labeled (color, graphic) CPR- Are there selection in-between 1 -3 -5?
TOP-DOWN PROCESSING/ DISCRIMINABILITY MEDIRESP III PROTOTYPE All knobs with number turn in same fashion except for CPR which only has 3 -options All signals should be shown to account for what the operator predicts Sizing of all knobs are the exact same which could lead to functionality confusion
REDUNDANCY GAIN MEDIRESP III PROTOTYPE none LCD screen will show individual value reading and continuous value reading- different colors used for different readings
PROXIMITY COMPATIBILITY PRINCIPLE MEDIRESP III PROTOTYPE Charge and alarm LED’s are similar in looks but not directly close to controls Spatial distance between knobs and associated label Displays that show pertinent information not centrally located All functions lined up horizontally Less controls and more of a usage of LCD screen- take away problem of screen-control proximity Any necessary knobs will be lined up with display information
NEW DESIGN PRINCIPLES Principle of pictorial realism • Battery charge displayed as symbol for battery • Heart rate indicated by heart symbol • Adding more symbols to redundantly display realism Principle of moving part • Any loaded data will mimic real movement and typical psychological movements in humans
CONTROL IDEAS
PUGH MATRIX HOUSING
PLASTIC SHEETING • • Strong Waterproof Connections (screws, bolts, etc. ) easily attached Cost Effective • Between $6 -$40 for 2880 square inches. • Adjustable / Easily Worked With • When heated, becomes extremely flexible and can be bent to specified angles. (Vaccu-form, manual shaping) • When cooled, retains shape and strength.
QUESTIONS
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