Nt1310 Unit 3 Application Paper

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First, the Elvis board was connected to a power source and to the computer. A team member then connected the IR optosensor to the Easy Pulse circuit board. Afterwards the Easy Pulse circuit board was wired to the NI Elvis II board using jumper wires, ensuring that the VCC, A0 and GND pins connected to the +5V, AI0+, and AIGND sections respectively. The AI0 was then connected directly to the AIGND on the Elvis board. Once that was done, another team member ran the program Pulse Moniter.vi and instructed the program to read from the physical channel Dev3/ai0. The Elvis board was then turned on to provide power to the system and the finger clip was placed onto the ring finger of a team member. More advanced diagrams of the correct wiring of the system are …show more content…
2.1. Test Procedure
Before data was analyzed, the Easy Pulse circuit had to be tuned to the team members’ specific pulse in order to produce transparent and accurate data. This is due to the fact that each individual person has relatively unique heart rates and pulse strengths. While the A0 pin on the circuit board was connected to the AI0+ channel on the Elvis board, P1 or the Gain was turned completely clockwise using a screwdriver. From there, P1 was rotated clockwise until the peak of each pulse were relatively close to 5V. Once tuned, data on the pulse signal was acquired and analyzed using the program Pulse Monitor.vi. This program calculated the heart rate of the team member in beats per minute (bpm), produced a graph of the data and saved the data into an Excel file. In order to see the stages of signal conditioning, data from various pins were taken to observe the effects of each stage of conditioning.

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