P13625: Air Quality Monitor/public/
Project Plan vs. Actual:
- PM Sensor
- Sensor responds well to high levels of PM but does not measure or trip at lower levels. Improving upon this in future versions by possibly adding an ionizing sensor in addition to the light based one could be beneficial.
- CO Sensor
- The CO sensor-breakout board combo did not function as the team had initially anticipated due to a lack of online documentation. In the end without designing our own break out board and without upgraded software(out of scope) it is not able to take continuous data readings but rather only acts as a binomial measure. In addition to this the amount of CO needed to trip the sensor cannot be determined due to a lack of facilities available to the team (although it can be changed using two potentiometers).
- Temperature & Humidity
- This sensor has functioned as was intended and seems to be a good fit for this project.
- PM Sensor
- The software is currently set up so that the monitor can interface with a computer to transfer data for processing through a putty application. This was trimmed down from using a cellular or mobile device to retrieve and then transmit data via email due to time constraints and the increased effort involved. This however would help to increase the mobility of the data collectors in Haiti and possibly improve the prospects of charging a cellphone vs. a laptop.
- The software is capable of running the monitor at a variable measurement frequency including the team's ideal value of 1 second.
- Scheduling for this project was beyond hectic and almost always behind because the team was too "blue-sky" in their thinking of both the content and quantity that could be included in this project.
- Make sure you always have extra catch-up time built into the schedule and expect things to go wrong! If they don't then you're done early and if they do its not a big deal.
- The team had to several times cut the scope of the project so that it was possible to finish on time. While this was ok with our guide due to the circumstances of how we began the project the team did not like doing this and it does not seem that it would be an acceptable practice in other scenarios.
- Battery life and power conservation
- Number of sensors, specifically more than one PM sensor each with different measuring process so that data can be compared.
- Accuracy and precision of data recorded.
- Take into serious account the power usage of the batteries. Current batteries are "Power Hogs"!
- Possible integration of sensors such as NOx and SOx(should be weighed against power consumption).
- Static accumulation withing the case:
- Research alternate case designs as well as materials.
- This may cause a possible interference with the PM sensor.
- Integration of mobile device to monitor for faster more effective data transfer in the field.
- Testing chamber for monitor
- Safely and accurately test for varying levels of CO.
- Accurately test varying levels of PM.
- Capable of varying both temperature and humidity.
- Possible integration with efficient cook stove.
- Ability to obtain accurate time lapse data from testing environment.
- Ensure that while beginning a project that the scope
is within reach.
- Our project was developed from customer needs forward solely by the team and this greatly affected the next quarter.
- When determining, if necessary, the scope of your project be sure to meet with professors from each department involved or all that should be involved and ensure that they feel that the content for the project is not too large in scale to be done in time.