Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Testbed prepared for polycarbonate containment incorporation.
Testbed pipe testing underway.
Gathered data is under analysis and is still being processed to develop the mathematical thresholds for leak detection tests.
Accomplishments from Previous Week
Water sealing treatment complete.
Testbed drainage holes drilled.
Redesigned accelerometer case printed and assessed.
Pressure sensor has been bonded and installed in a PVC T-connector.
Received Raspberry Pi setup with second accelerometer and capability of 3200Hz sampling (up from 1600).
Testbed faults and unintended leakages assessed and addressed.
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Redesign of accelerometer casing with consideration of last week's case. Madeline
Purchase polycarbonate. Bryan
Design and incorporate rise-drop pipe elements into testbed piping. All
Improve website. Gordon
Preliminary Design Review presentation. All
Process and continue analysis of data for trends. Sam
Review conceptual theory behind phenomenon that's driving accelerometer readings. All
Use new pressure sensor and flow meter to understand the response phenomena. All
Run tests with the new sensors placed just before the sprinklers, on the rise sections.
Order more bolt assemblies and corner brackets to fasten the 80/20 frame to the sealed wood surface. Sam
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Kirt taught us how to use the Raspberry Pi setup to take pressure, flow rate, accelerometer data.
Correlate change in time for air to evacuate with the phase change (distance between the 2 spikes) in the accelerometer data
We (sponsors included) are all still trying to understand the fluid mechanics phenomena that is driving the signal shape of the accelerometer data.
It may be air and water interactions, and the compressibility factor of the air complicates modeling.
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Use an o-ring to seal the pressure sensor to the PVC T-connector
We used silicone glue to further seal it
Try placing the accelerometer at different points along the PVC piping to observe propagation
You can do numerical analysis for a valve-sprinkler-sprinkler system, pressure at the second sprinkler is varying as the water enters system
Perhaps concentrate data analysis around the spikes of the accelerometer data to help differentiate smaller leaks
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
Risks and Areas of Concern
Driving phenomenon theoretical and conceptual framework.
Trend analysis in data.
Schedule
Assemble polycarbonate container for the testbed
Budget (list amount spent and amount remaining)
Amount spent: $808.85
Amount remaining: $1691.25
Planning to purchase polycarbonate sheets this week
Estimated cost: $525
Estimated remaining: $1166
Progress on Report and Webpage
Finished draft 2 of the report.