EHP - Emotion Heartbeat Project
The "Emotion Heartbeat Project" is a project that will collect my heartrate as a datatype. This data will be displayed in a visual way with diagrams and create an emotional diary out of that. With an increased heartrate the heartrate monitor will ask for the cause of it to differentiate between positive and negative stress or sports activities.
First Ideas And Thoughts
EHP
Emotion Diary
Headphones
Heartrate Monitor
Decision Diagram
Collected Heartbeat-Data Within 1 Week
Heartrate Diagrams
One of my first ideas was to connect the heartrate monitor with headphones that would calm down my increased heartrate with music and vibrating sensors at my neck; showing picture 3 and 5. The decision diagram displays how this should work.
But within this semester I will just build up the heartrate monitor itself.
Picture 6 and 7 are showing the result of 1 week of collecting heartrate data. I counted my heartbeat within 1 minute manually 4 times a day for 1 week. Pic 6 shows a diagram displaying the whole week at a glance; Pic 7 shows the diagrams of each day in particular. (Unfortunately I couldn't get it work with a consistent scale for the heartrate.)
Related Links To That Topic
- http://www.eng.utah.edu/~jnguyen/ecg/instructions.html
- http://www.swharden.com/blog/2009-08-14-diy-ecg-machine-on-the-cheap/
- http://infosthetics.com/archives/2006/07/beating_heart_blog.html
- http://netzspannung.org/cat/servlet/CatServlet/$files/320590/herzfassen-technik.pdf
How To Build It?
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IR-Emitter/Detector
circuit_schematic
arduino_processing
processing_screen
Inspired by diverse links and Youtube videos the very first try to build it was to use IR Emitter and Detector. It didn't work that well: the sensors are pretty sensitive for moving action and the signal at processing was very faint.
To amplify the signal I used a low voltage op-amp LM358N.
The images of the third gallery show the circuit, schematic and processing screen result.
Related Links
- http://www.youtube.com/watch?v=BAp1snPchT4&NR=1
- http://www.youtube.com/watch?v=yADsi5W-Lls
- http://www.andere-baustelle.net/?page_id=101
- http://suchamagicworld.blogspot.com/2008/04/still-alive-heartbeat-irsensor-report.html
The Data Logger Shield for the Arduino board is directly plugged on the top of it and will save the collected data to a SD card.
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circuit schematic
processing screenshot
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The selfmade sensor with the IR Emitter and Detector is very sensitive for any motion and movements of the finger being measured. So I tried out a EKG Sensor which displayed a higher resolution of the heartbeat on processing. There are 3 electrodes patches placed on the skin: One on the right wrist for the reference, one on right elbow for the negative alligator clip and one on the left elbow for the positive clip.
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heartbeat on processing window
heartbeat calm
heartbeat increased
heartbeat on processing window
