Build & Test Prep
Table of Contents
Team Vision for Build & Test Prep PhaseOur team set out to verify that we were able to carry out the build phase of our device. We also focused on the refining of our test plans. Expansions were carried out on our device test plan, and all IRB Human Subject Testing has been submitted to the IRB office.
Build Plan SummaryVerification for build was done by ensuring that each critical part was ordered and received by the PICS office. As well as through review of our schematic/wiring diagram. We discussed and expanded on housing designs, including a housing design for the power system. We determined locations, rough time, and procedure to test each specific ER.
We will be using our assigned senior design lab to proceed with the bulk of our build phase. Our device is meant to be compact which will allow us to work on it with the provided workbench.
Communication/Software System StatusWe have obtained the HC-05 bluetooth device and installed it into the hardware system from P18043. We have updated our Arduino code to use the correct ports for the HC-05 connection on the Arduino Mega. We are currently working to improve our understanding of the virtual serial ports related to the HC-05 and how we can use them to incorporate bluetooth communication into the code on the computer which we use to receive and process the data. Bluetooth connection has been made between the device and the computer, but we have yet to transfer data from the device to the computer. All files are being saved to project's GitHub repository here.
We have created additional .kst files which can be used to implement different display formats into the main GUI code. The main GUI has been simplified, and we are in the process of making the code "foolproof". For example, the GUI must be able to start recording, stop recording, connect/disconnect from the device, change patient information, etc, without the software crashing or getting stuck in a loop.
Test Plan SummaryWe were able to determine concrete ways to verify that our design matches with our engineering requirements, and therefore our customer requirements. Our device test can be found in "Device Test Overview." This test procedure will be used to test our engineering requirements to all test standards that have been agreed on by team P19043 and our customer. (ie. 40 Hz sample rate, 8 hrs of batter, etc.)
We have additionally submitted our IRB test protocol to gain approval for human subject testing. Frank Howard, the team lead, has taken the certification course required by the IRB to carry out human subject testing and will need to be present for all human subject testing. Our IRB protocol has been submitted and is under review.
BOMThe BOM is completely updated. The most recent purchased and delivered items are the 5V Regulator, the Battery Housing, and the M3x6mm Screws. Overall, all requested items have been purchased and delivered. After setting aside $50 for future 3D printed materials, the remaining budget is $206.80, which means there is 41.2% left of the initial $500.00 budget. Again, the team was approved for a $1500.00 extension by the customer.
Risk and Problem TrackingWe have began risk tracking to verify that our team is on the right track. As time goes on, we should be able to track the drop of our perceived risk until project completion at which point it should reach zero.
The first tab of our risk assessment workbook remains as it was previously, but we have introduced three new tabs to aid in risk tracking. We will compare our perceived risk at steady intervals, storing the numerical data in the 'Risks Over Time Data' tab. The data from this tab will be used to create the corresponding 'Risk Graph' in the third tab. The same data will display a breakup of each risk corresponding to importance via a bar chart in the fourth tab.