There was not much done in lab this week as this lab was spent tweaking things for the project check.
The results of the check has shown us that we need to put in code to filter the ECG signals and read and display heartbeats per minute of the user on the device. We also need to put together a presentation for week 10.
May 27, 2014
May 21, 2014
Weekly Update #8: Button and Filtering
Hello,
We hooked up the Bluetooth module again to allow the device to communicate with a smartphone or computer wirelessly. We also put a button on the device to act as a kill switch. The button currently restarts the device. We need to change this so that it just stops the functions of the device. Since this is not an integral part of the device, we aren't spending much time on it. Should it not work, it will just be left off of the final deliverable.
We worked on trying different ways to filter the signals as the sensors are not very accurate. We haven't found a way that works well enough to make us want to keep it in the program for the device. This is what most of the remaining time will be spent on with the project.
We hooked up the Bluetooth module again to allow the device to communicate with a smartphone or computer wirelessly. We also put a button on the device to act as a kill switch. The button currently restarts the device. We need to change this so that it just stops the functions of the device. Since this is not an integral part of the device, we aren't spending much time on it. Should it not work, it will just be left off of the final deliverable.
We worked on trying different ways to filter the signals as the sensors are not very accurate. We haven't found a way that works well enough to make us want to keep it in the program for the device. This is what most of the remaining time will be spent on with the project.
May 14, 2014
Weekly Update #7: Portability
Hi there,
In week seven's lab, we looked through more sample code to try to get a working program together. The sample code that came with the new sensor contained code for calculating peaks and troughs of a heart rate. We worked on incorporating that into our existing program.
We also decided to switch back to the sensor that straps onto both wrists and leg. While the new sensor seemed to work better in terms of signal clarity, it was too difficult to work with. The old sensor provided better mobility when it was worn and we felt more familiar with it.
We got antistatic bags this week, covered the device in them, and packaged the whole thing in a waist pack. The LCD module is mounted on the outside of the waist pack so the user can see the status of their heart rate. The way that the device is placed in the waist pack also lets the user plug it into a computer without having to open the main pocket.
In the next couple of weeks we hope to complete the program and get the device to detect abnormalities in the user's heart rate. We're also working on a presentation and the final report for week ten.
In week seven's lab, we looked through more sample code to try to get a working program together. The sample code that came with the new sensor contained code for calculating peaks and troughs of a heart rate. We worked on incorporating that into our existing program.
We also decided to switch back to the sensor that straps onto both wrists and leg. While the new sensor seemed to work better in terms of signal clarity, it was too difficult to work with. The old sensor provided better mobility when it was worn and we felt more familiar with it.
We got antistatic bags this week, covered the device in them, and packaged the whole thing in a waist pack. The LCD module is mounted on the outside of the waist pack so the user can see the status of their heart rate. The way that the device is placed in the waist pack also lets the user plug it into a computer without having to open the main pocket.
In the next couple of weeks we hope to complete the program and get the device to detect abnormalities in the user's heart rate. We're also working on a presentation and the final report for week ten.
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