Upload
helga
View
48
Download
0
Tags:
Embed Size (px)
DESCRIPTION
P-14054 Smoking machine . Chris Boise Eric Cawley Gideon Oladunjoye Jose Pardes Matt Cross Megan Guarnieri Cleary. Overview. Problem Statement Customer/Engineering Requirements System Overview Final Design Problem Tracking Current State Test Results Future Tasks. - PowerPoint PPT Presentation
Citation preview
P-14054 SMOKING MACHINE
Chris Boise
Eric Cawley
Gideon Oladunjoye
Jose Pardes
Matt Cross
Megan Guarnieri Cleary
OVERVIEW• Problem Statement• Customer/Engineering Requirements• System Overview• Final Design• Problem Tracking• Current State• Test Results• Future Tasks
PROBLEM STATEMENT• In order to simultaneously collect emissions
and transport undisturbed casts for analysis, current hollow cast models will be combined with the existing side stream smoking machine. Device will operate using acquired data from the wPSMD. Unit needs to be self-contained, portable, fit on a workbench, and user friendly. The unit must also be production ready for identical machines in other labs. During operation smoke needs to be ventilated responsibly and the unit must be interfaced with LabVIEW.
CUSTOMER REQUIREMENTS
Customer Rqmt. #
Importance Description Comments/Status Status
CR1 9 Puff cigarettes at different progammable flow rates Data will be obtained from wPSMDCR2 9 Collect mainstream emissions and transport them to NTID chemical lab Collected simultanesously with CR3CR3 9 Collect sidestream emissions and transport them to NTID chemical lab Collected simultanesously with CR2CR4 9 Incorperate hollow lung cast into mainstream emissions test Dr. Robinson is in charge of the cast after the test.CR5 9 Must be self-contained and portable Must fit on a workbench CR6 3 Must be user friendlyCR7 1 Must be able to be assembled in other labs Not for mass production.CR8 3 Smoke must be ventilated to an outside enviornment Improve upon current systemCR9 9 Direct exaust from main stream through side stream machine
CR10 3 Humidify main stream smoke Be aware of ISO standardCR11 1 Design to ISO/Coresta standards If production is hindered, ignore standardsCR12 9 Incorperate Electronic cigarettes
ENGINEERING REQUIREMENTS
rqmt. # Importance Source Engr. Requirement (metric) Marginal ValueIdeal Value Comments Status
S1 9 CR1 Design/create puffing profile from the data obtained from wPSMD mL/min - - Units of pump logicS2 9 CR1 Reproduction of generated puff profile % 5% <5%S3 3 CR5 Fit on a workbench and be portable m2 1.5 <1S4 9 CR6 Create a user-friendly manual for machine operation - - - Pass or fail test S5 9 CR6 Make a user-friendly LabVIEW interface - - - Pass or fail test S6 9 CR2,CR3 Collect mainstream and side stream emissions simultaneously - - - Reduce from 5 cigarettes to 1S7 9 Deliverables Generate Labeled and documented flow diagrams of Pressures Pascals - - To identify potential leaks in the systemS8 9 Deliverables Generate Labeled and documented flow diagrams of Flow Rates ml/s - - To identify potential leaks in the systemS9 9 Deliverables Generate labeled and documented wiring diagram V - -S10 9 Deliverables Label system according to respective diagrams - - -S11 1 Deliverables Generate parts list with BOM per vendor specifications - - -S12 3 CR12 Incorporate adaptor to smoke electronic cigarettes - - -S13 3 Deliverables Improve ventilation system from prior projects. - - -S14 3 CR6, CR11 Consistent polypro tubing size/connector size mm 9.5 (3/8 in) make standard throught system, no rubber per ISOS15 3 CR9 Vent main stream exhaust to side stream system - - - Pass or fail test S16 3 CR11 Cigarette holder needs to be level deg +5 deg 0 deg per ISO standardS17 1 CR11 Ash tray below cigarette mm 20-60 40 per ISO standardS18 3 CR11 Pressure drop of complete flow path for 17.5 mL/sec Pascals 300 0 per ISO standardS19 3 CR11 Dead volume mL 100 0 per ISO standard S20 3 CR11 Pressure drop across filter system Pascals 250 0 per ISO standardS21 9 CR11 Puff termination device - - - per ISO standard, pass or fail testS22 3 CR11 Temperature and Relative humidity chamber measurement - - - per ISO standard, record before testingS23 3 CR11 Flameless first-try ignition - - - per ISO standard, pass or fail testS24 3 CR11 Fishtail chimney testing height above ash tray mm - 6 per ISO standardS25 3 CR11 Side stream smoke flow rate L/min +/- 0.1 3 per ISO standard
rqmt. # Importance Source Engr. Requirement (metric)Unit of
Measure Marginal ValueIdeal Value Comments Status
S1 9 CR1 Design/create puffing profile from the data obtained from wPSMD mL/min - - Units of pump logicS2 9 CR1 Reproduction of generated puff profile % 5% <5%S3 3 CR5 Fit on a workbench and be portable m2 1.5 <1S4 9 CR6 Create a user-friendly manual for machine operation - - - Pass or fail test S5 9 CR6 Make a user-friendly LabVIEW interface - - - Pass or fail test S6 9 CR2,CR3 Collect mainstream and side stream emissions simultaneously - - - Reduce from 5 cigarettes to 1S7 9 Deliverables Generate Labeled and documented flow diagrams of Pressures Pascals - - To identify potential leaks in the systemS8 9 Deliverables Generate Labeled and documented flow diagrams of Flow Rates ml/s - - To identify potential leaks in the systemS9 9 Deliverables Generate labeled and documented wiring diagram V - -S10 9 Deliverables Label system according to respective diagrams - - -S11 1 Deliverables Generate parts list with BOM per vendor specifications - - -S12 3 CR12 Incorporate adaptor to smoke electronic cigarettes - - -S13 3 Deliverables Improve ventilation system from prior projects. - - -S14 3 CR6, CR11 Consistent polypro tubing size/connector size mm 9.5 (3/8 in) make standard throught system, no rubber per ISOS15 3 CR9 Vent main stream exhaust to side stream system - - - Pass or fail test S16 3 CR11 Cigarette holder needs to be level deg +5 deg 0 deg per ISO standardS17 1 CR11 Ash tray below cigarette mm 20-60 40 per ISO standardS18 3 CR11 Pressure drop of complete flow path for 17.5 mL/sec Pascals 300 0 per ISO standardS19 3 CR11 Dead volume mL 100 0 per ISO standard S20 3 CR11 Pressure drop across filter system Pascals 250 0 per ISO standardS21 9 CR11 Puff termination device - - - per ISO standard, pass or fail testS22 3 CR11 Temperature and Relative humidity chamber measurement - - - per ISO standard, record before testingS23 3 CR11 Flameless first-try ignition - - - per ISO standard, pass or fail testS24 3 CR11 Fishtail chimney testing height above ash tray mm - 6 per ISO standardS25 3 CR11 Side stream smoke flow rate L/min +/- 0.1 3 per ISO standard
rqmt. # Importance Source Engr. Requirement (metric) Marginal ValueIdeal Value Comments Status
S1 9 CR1 Design/create puffing profile from the data obtained from wPSMD mL/min - - Units of pump logicS2 9 CR1 Reproduction of generated puff profile % 5% <5%S3 3 CR5 Fit on a workbench and be portable m2 1.5 <1S4 9 CR6 Create a user-friendly manual for machine operation - - - Pass or fail test S5 9 CR6 Make a user-friendly LabVIEW interface - - - Pass or fail test S6 9 CR2,CR3 Collect mainstream and side stream emissions simultaneously - - - Reduce from 5 cigarettes to 1S7 9 Deliverables Generate Labeled and documented flow diagrams of Pressures Pascals - - To identify potential leaks in the systemS8 9 Deliverables Generate Labeled and documented flow diagrams of Flow Rates ml/s - - To identify potential leaks in the systemS9 9 Deliverables Generate labeled and documented wiring diagram V - -S10 9 Deliverables Label system according to respective diagrams - - -S11 1 Deliverables Generate parts list with BOM per vendor specifications - - -S12 3 CR12 Incorporate adaptor to smoke electronic cigarettes - - -S13 3 Deliverables Improve ventilation system from prior projects. - - -S14 3 CR6, CR11 Consistent polypro tubing size/connector size mm 9.5 (3/8 in) make standard throught system, no rubber per ISOS15 3 CR9 Vent main stream exhaust to side stream system - - - Pass or fail test S16 3 CR11 Cigarette holder needs to be level deg +5 deg 0 deg per ISO standardS17 1 CR11 Ash tray below cigarette mm 20-60 40 per ISO standardS18 3 CR11 Pressure drop of complete flow path for 17.5 mL/sec Pascals 300 0 per ISO standardS19 3 CR11 Dead volume mL 100 0 per ISO standard S20 3 CR11 Pressure drop across filter system Pascals 250 0 per ISO standardS21 9 CR11 Puff termination device - - - per ISO standard, pass or fail testS22 3 CR11 Temperature and Relative humidity chamber measurement - - - per ISO standard, record before testingS23 3 CR11 Flameless first-try ignition - - - per ISO standard, pass or fail testS24 3 CR11 Fishtail chimney testing height above ash tray mm - 6 per ISO standardS25 3 CR11 Side stream smoke flow rate L/min +/- 0.1 3 per ISO standard
SYSTEM OVERVIEW
SYSTEM OVERVIEW
FINAL DESIGN
FINAL DESIGN• Electronic cigarettes• 2 syringe pumps• Sliding access door• No filter between chimney and impinger• No pressure or temperature sensors• Limit switches• Termination and reset program• Overhead exhaust vent• H-bridge with protection• Larger DAQ interface
PROBLEM TRACKINGIdentifying & Selecting
ProblemPSP 1
AnalyzingProblem
PSP 2
Generating PotentialSolutions
PSP 3
Selecting & PlanningSolution
PSP 4
Implementing SolutionPSP 5
EvaluatingSolution
PSP 6
Rating R1 R2 R3 Y4 Y5 G6
Filter Change OutUnable to get to Cambridge filter to be changed by one person in an efficient
manner.
Cut two doorways. Make a movable side. Use different connections. Widen
the access door.Make a moveable side.
Ran trials with team members to ensure everyone can change a filter within the 5
minute limit.Solution Passes trials.
Pump Program does not run consistently
When the program is run the pump will react to it sometimes or it will not
Give pump more time to react, run the pump multiple times so that it works at
least once.
Call company to see if it's a common problem
Company offered an easy code to fix the problem
Pump now able to load profile off excel spreadsheet
Lighter coil set cigarette on fire Pump program failed and stopped working
Restart computer after crash, Switch pumps, boosted priority level to high on computer, killed power of whole
machine and turned it back on
After restarting and setting priority level to high pumps were switched
Ran tests after switching pumpsProgram stopped crashing after pumps were switched, ran 10
consistent trials
Unacceptable/Non-Repeatable DataDifferent amounts of tar for the same
cigarette tested
Clean out tubing and make sure that initial conditions are the same for all
tests
Run many test to see if there are anomalies. Most of the time our data is
over the maximum
Create scatter plot in mini-tab and point our the outliers
See technical paper for results
Inconsistent CigarettesFluctuation in amount of tar and nicotine
in cigarettesObtain new pack of research
cigarettesObtained a new pack of research
cigarettes
Ran trials with new pack of cigarettes and evaluated how spread out the values of tar
and nicotine are
Cigarettes were not allowed to reach proper humidity and it swayed the
data obtained
LabVIEW Timing Inconsistent Actuator Movement
Close out LabVIEW and reset program after each trial, increase
priority on computer. Reset computer after certain number of tests.
Increase priority level, able to run 5 tests before LabVIEW and computer have to be
restarted.
Ran trials to measure progression of actuators.
Able to run 10 trials on high priority before computer needs to be restarted
Poor Ventilation Smells likes smoke
Change filters in EcoFlo or find the leak in the system, allow time for
cigarette to burn out, speed up ecoflo to vent out faster
Allow time for cigarette to burn outRan trial and waited 5 minutes for cage to
clear before opening
Visually saw cigarette go out and allowed smoke to clear the chimney,
reducing the smell of smoke.
Uncontrolled Actuator MovementDoes not stop or start when
programmed to
Check connections to make sure they are set up correctly and check program, install limit switches
Installed limit switchesRan test to stop actuators using limit
switchesLimit switches killed power to actuator
in order to avoid collisions
No Ignition of Cigarette Tobacco is being dragged out by lighting coil
Test lighting coil and check that all connections are wired correctly, make
sure lighting coil does not touch cigarette tip
Make sure lighting could does not touch cigarette tip
Changed time actuator moves so that it stops before cigarette tip
Lighting could stops before cigarette tip but is still close enough to light with
pump inhale
Loss of flow rate Leaking T-connectionsUse solid 5-hole block to replace tubing with T-connections and Y-
connections
Utilize a block found in the lab and drill and tap 5 holes to connect to push-to-connect
fittingsUsed pipe gel to minimize the risk for leaks
Saved space as well as time plus it no longer leaks
Display Side of Cage Obstructed Vertical actuator mounting bracket and
door in viewable spaceSwitch the two sides of the cage around, deal with the issue as is
Unbolt the two sides of the cage and cut the epoxy
Unbolted, switched around, and relied. Resulted in about 40 min of extra
work. Problem solved
H-bridge Not FunctioningNo actuator movement after it had been
workingWhen actuators his bottom/top dead
center the current when to highOrder another one or take to CIM building
for analysis and look into why it blew
Ordered a backup as well had the first one repaired. Using limit switches before the actuators bottom out and draw too much
current.
Resulted in about a week of downtime. Waiting on parts.
ORDINARY
Critical
MAJOR
CURRENT STATE• Proven results for research cigarettes • Electronic cigarettes capable• Lung cast produced and all parts delivered• Internal lung cast pressure program • Labeling all required parts and wires• Program reset• Customer documentation
TEST RESULTS• 36 Total Research Trials (1R5F)• Eliminated non-7 puff trials and anything with
percent error > +/-70%• Resulted in 15 samples
• TPM avg.= 2.145 mg• % Error avg.= 3.13%
TEST RESULTS
FUTURE TASKS• Fix/reduce actuator creep through
LabVIEW or limit switches• Automated puffing profile from WPSM
device• Calibrated/verify puff using flow meter• Automated parallel correction to puffing
profile• Lung cast deposition incorporation• Puff selection drop-down menu
SUMMARY• Problem Statement• Customer/Engineering Requirements• System Overview• Final Design• Problem Tracking• Current State• Test Results• Future Tasks
QUESTIONS?