Saturday, May 10, 2014
This we we worked on filtering the signal form the heart beat sensor. The signal received from the sensor went through hardware filtering and now we want to accurately count the beats per minute. We started by trying to detect the peaks on the graph. On Processing we started by coding an array that received 200 data points. As each data point is spaced by 15 millisecond, we got readings from the sensor for 3 seconds. We determined the high and lows on this signal and removed everything that is above or below our range. This range were determined to be greater that 800 or less than 500. Anything that falls in this range is an error caused by moving the sensor and not the signal of heart beat as we wanted. We are getting close to accurate reading and the reading doesn't go too low and too high.
We also tested with a sensor form http://pulsesensor.com/. This is the sensor that works on the same principle as the designed sensor but is smaller in size as all the circuit is printed onto its back.
Finally we are working on the Final Lab Report draft. We are diving the work among each other and will combine and form the report.
