Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Analysis
Pending
NA
Complete
Bernoulli and Navier Stokes Analysis through syringe, tubing and needle: Complete
Handheld device flow control interface sensor analysis: Complete
Component Analysis:
Load Cell Analysis: Complete
Handheld Flow Control Interface Sensor Analysis: Complete
Syringe Pump Analysis: Complete
Design
Pending
Control Module: Functional design generation stage
Material Selection
Interface Layout
Handheld Device: ergonomic prototypes
Ergonomic Prototypes - 3D Printed units are complete, pending feedback
Sensor interface - Pending
Pressure Sensing:
Calibration will be attempted for Disposable Pressure Transducers pending arrival of signal conditioning circuit elements (DC/DC Converter)
Complete
Syringe Pump: Ordered, delivery pending
Fabrication
Pending
Handheld Device
3D Printed units are complete, pending feedback
Control Box
Complete
NA
Tests
Pending
Connecting syringe pump and testing flow rates - Functional Requirement Verification
Calibration test for disposable pressure transducers
Complete
Connecting disposable pressure transducer and acquiring a signal - Complete
Operating pressure of our device is outside the linear limits of available disposable pressure transducers
Connecting and playing with sensors for handheld device interface - Complete
Accomplishments from Previous Week
Completed multiple CAD concepts
Received feedback from Dr. Beal on his favorites
3D Printed ergonomic prototypes
Ordered the syringe pump
Interfaced microprocessor with all sensors
Completed handheld device sensor analysis
Ordered signal conditioning tools for pressure transducer
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Complete next iteration of ergonomic prototype based on Dr. Beal's feedback (as necessary) - Michael(?)
Complete sensor interface CAD, one sensor each - Michael and Rene (?)
Interface syringe pump with microprocessor - Rene
New Control Box CAD based on Dr. Beal's input of last concept generations - Jamie
Selection of off-the-shelf control box for customization and purchase - Pako
Completing control interface and logic architecture - Pako
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Date: 4/14/14, IN PERSON
Control Box
Liked the simplicity of Jamie's design
Liked the horizontal layout of Pako's design
Does not want as many bells and whistles
Liked the swivel properties of Michael's design
However, it is a little too much given the scope of the project
OVERALL TAKEAWAY
Wants a design with a layout similar to Pako's but with the simplicity of Jamie's
Reminded us to keep in mind that this prototype will eventually be handed off for further design
Actions Taken
Functional design will begin with these considerations in mind
Handheld Device
Particularly liked the ergonomics of Michael's design
Wants the tare button on the back of the device
Does not wan't snap in, prefers fluid to go through the device itself
Luer lock based interface
Liked the travel and feel of the smaller joystick
Liked the simplicity of the PSP joystick but it has too little travel
OVERALL TAKEAWAY
Wants a design with the ergonomic's of Michael's
Wants a design with direct luer lock interface, no "snap in" of tubing
I.e. wants fluid to travel through handheld
Wants the tare button on the back of the device
Wants similar travel and feel to that of the small joystick
Actions Taken
Investigated fludic compatibility of acrylic based 3D printed material
Printed non-functional ergonomic prototypes on ABS for feedback
Begun design of next iteration with these considerations in mind
Pressure sensor
Wants the sensor close to the syringe and out of the way
Actions Taken
Defined the scope for continued fluidic analysis
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Date: 4/10/14, IN PERSON
Date: 4/14/14, WRITTEN COMMENTS FROM PRESENTATION
See if a box can be purchased with face plate that one can easily customize
Pending
Terminology - feedback is not the correct term for our variable flow control sensor
Noted
Analysis - Clearly define objectives
Noted
Quantify percentage of pressure change in measurement would occur by moving sensor
Defined in scope of pending fluidic analysis
Did not address issue of pressure inside body, is it helpful to simulate injection?
Issue was not addressed in presentation but addressed in meeting with Dr. Beal. He suggested the use of simulation flesh that they practice with or pork tissue
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
Date: 4/14/14, WRITTEN COMMENTS FROM PRESENTATION
Some sort of signal (visual/auditory) corresponding to pressure being sensed
Already considered
What will be the power source
Already considered, wall
How will the system be calibrated
Already considered and pending
Risks and Areas of Concern
Calibration of disposable pressure transducers
Resources or Information Required but not Available
NA
Schedule
Describe upcoming milestones
Interfacing syringe w/ pump (4/25)
Defining control interface and buttons/screens (4/25)
Test handheld sensor housing design (5/2)
Finalize Control Box Design (5/2)
Calibrate Pressure Sensor (5/2)
Gantt Chart:
A little behind
Interface with pump should have been completed last week
Defining control interface and buttons/screens should have been completed last week
Last updated: 4/21/14
Budget (list amount spent and amount remaining)
Spent: $750.00
Remaining: $1750.00
Progress on Report and Webpage
Webpage
Internal page draft complete
Home page in progress
Report
NA