Pressure Control Subsystem Comprised of t hose splitter

Pressure Control Subsystem Comprised of… -t hose splitter -dual flow needle valve -amplified voltage pressure transducer -powered breadboard

Needle Valve Chosen due to… -high resolution therefor minor adjustments to flow can be made (5 turns) -dual flow capability (allows inhale and exhale simulation) -low profile for organization -low cost (20$)

T Hose Splitter Important to… -separate static pressure from dynamic flow -allow pressure readings to be taken parallel to flow increasing accuracy -organize flow path from model to valve system

Amplified Pressure Sensor Was chosen based on… -accuracy (can measure static pressures +/- 1% with proper calibration) -cost (65$ per sensor) -compact design (no extensive cables or adaptation, plug into breadboard) -easy to calibrate and characterize to increase accuracy

Breadboard Implementation Reasoning… -keeps voltage sensors organized and setup compact -allows user to adjust voltage getting applied to sensors easily -flow from pressure control to daq device will be smooth

Pressure Control Path Fluid will leave outlet With steady state conditions fluid will separate due to splitter and apply static pressure on sensor Back to pump Flow will be adjusted with needle valve based on logger pro readout compared to desired conditions