TEAM LEADER: DANIEL FENTON KENNEDY KONG MARIE REVEKANT DAVID ENGELL ERIC WELCH DEREK ZIELINSKI CHRIS FREEMAN MELISSA HARRISON RYAN MUCKEL ROBERTO CASTILLO ZAVALA P13026: PORTABLE VENTILATOR

ENGINEERING SPECIFICATIONS

PUGH MATRIX MASS FLOW SENSOR

HONEYWELL AWM2100V FEATURES Bidirectional sensing capability Actual mass air flow sensing Low differential pressure sensing The AWM2000 Series microbridge mass airflow sensor is a passive device comprised of two Wheatstone bridges. Data is transmitted via analog.

HONEYWELL AWM2100V CONT. Performance / VDC, 25°C CharacteristicValue Flow Range (Full Scale) +/- 200 sccm Accuracy2.5% Weight10.8g Power Consumption 30mV – 50mV Sensor CurrentMax. 0.6mA Response Time 1msec – 3msec Temp. RangeOper. -25°C to +85°C Storage: -40°C to +90°C Dimension31.5mm x 54.4mm x 15.5mm

PUGH MATRIX PRESSURE SENSOR

NPC 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 A-1-L LOW PRESSURE SENSOR CharacteristicValue Pressure Range (Full Scale) 5psi or 351.6cmH2O To 15psi or cmH20 Accuracy.5% Weight2.5g Temp. RangeOper. -40°C to +125°C Storage: -55°C to +150°C Dimension15.24mm x 15.24mm x 4.2mm Output TypeAnalog

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. 16bit resolution is pretty good Programmable gain amplifier (PGA) Similar to an OP AMP circuit, this would control the gain digitally. Two I2C modules Some of the sensors have I2C 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 T1-1HD-12- 1NEA 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

12V 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 100V-240VAC CHARGER LOW BATTERY AUDIBLE ALERT PRICE: $125, EXC. TAX & SHIPPING LEAD TIME: 5 DAYS Powerizer 18650

12V, 5V 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 VAC charger, can also be charged with 9-24VDC Low battery audible alert Price: $200, inc. tax & shipping Lead time: ? PowerStream PST-MP3500-I

POWER FLOW

FEASIBILITY Current (A)Voltage (V)Power (W) Pump MCU (MK60N512VMD100) Truly 3.2" LCD (TFT E) Total 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 Principles based on Attention Memory Principles Mental Model Principles

MAKE DISPLAYS LEGIBLE (AUDIBLE) MEDIRESP III Values that are set are not readable Alarm beep without verbal instructions Ability for confusion with setting (breaths/minutes and liters/breath) Scales for knobs are not readable PROTOTYPE Values will be shown as figures (digital) CPR instruction will be audible Gradient of any knob will be labeled (color, graphic)

AVOID ABSOLUTE JUDGMENTS MEDIREP III Confusion for scales of knobs- begins and ends at “0”? CPR- Are there selection in-between 1-3-5? PROTOTYPE Gradient of any knob will be labeled (color, graphic)

TOP-DOWN PROCESSING/ DISCRIMINABILITY MEDIRESP III All knobs with number turn in same fashion except for CPR which only has 3-options Sizing of all knobs are the exact same which could lead to functionality confusion PROTOTYPE All signals should be shown to account for what the operator predicts

REDUNDANCY GAIN MEDIRESP III none PROTOTYPE LCD screen will show individual value reading and continuous value reading- different colors used for different readings

PROXIMITY COMPATIBILITY PRINCIPLE MEDIRESP III 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 PROTOTYPE 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