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Current instruments used in the measurement of pulse transit time are inefficient for home use. An existing product with working ECG and pulse wave circuits along with software to analyze the data has been provided. The primary goal will be to optimize the existing setup for use at home. This will be performed by miniaturizing the circuit, reducing the signal to noise ratio, and improving of the already existing software. These tasks will attempt to be rectified by numerous design additions.
The final design employs a new ECG circuit that has greatly reduced the amount of noise in the wave output. This will allow the software to better detect the R waves and calculate pulse transit time. The software scans the outputed data for the highest peak. A threshold and period is then set and the software rescans the data looking for peaks within the threshold and in each period. The data comes from a memory card. The memory card is inside of the data logger which acts as a collecting device and an analog to digital signal converter. It has a 14 bit processor and samples at a rate of 100 Hz.
The team members have met with advisor Block.
The team members met with Dr. Green to discuss the project and what his expectations are.
We have determined the priorities of our project according to feasability and our clients expectations. We are looking at giving the device internal memory to eliminate the need for a large beside machine and make the device easier to sleep with. Second, we are looking into writing a program to help remove skipped beats from the ECG wave output. Finally, we want to make a printed circuit to help reduce the noise on the wave output and to reduce the size of the device. We have decided to pursue making the device smaller. Instead of printing the current circuit, we are looking into improving the circuit or buying a new circuit. The new circuit would include a microprocesser that could be programmed to communicate with a flash memory drive where data could be recorded.
| Week | Reporting Period Beginning | Activities |
|---|---|---|
| 1 | September 8 | Topic selection. |
| 2 | September 15 | Team meeting with the advisor. |
| 3 | September 22 | Team meeting with client |
| 4 | September 29 | Identified clients priorities for project |
| 5 | October 6 | Developed ideas for making device smaller, and integrating flash memory |
| 6 | October 13 | Decide on final direction and begin work on paper and presentation |
| 7 | October 20 | Midsemester Presentation |
| 8 | October 27 | Meet with client and determine feasability of design |
| 9 | November 3 | Modified design options and decided that flash memory will require many semesters work |
| 10 | November 10 | Meet with client and determined that data logger was worth the money. Ordered Data logger |
| 11 | November 17 | Continued work on LabVIEW software to modify program |
| 12 | December 1 | Attempted to build new ECG circuit to reduce noice. Tested data logger |
| 13 | December 8 | Got new ECG circuit to work and recorded data to data logger, improved software, poster presentation |
| 14 | December 15 | Finish Final Paper and last client meeting |
| 15 | December 22 | Last Advisor Meeting |
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Mid Semester Powerpoint Presentation (Oct 20 2006, 1448 kb) |
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PDS Updated October 26 (Oct 29 2006, 11 kb) |
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Mid Semester Paper (Oct 29 2006, 678 kb) |
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Final Paper (Dec 13 2006, 2612 kb) |
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Final Poster (Dec 13 2006, 13726 kb) |
