We started the day listening to a seminar by Dr. Wan over the second part of system control. The information was extremely useful as we are required to discuss how control plays a role in our aquaponic tank. The following info was obtained from Dr. Wan's lecture so will be slightly modified before our final presentation.
For the second part of the day we focused our attention on finalzing our food dispenser build, adding the 1/2" rubber tubing for water control tank, lesson plan development, and checking today's water conditions. As mentioned yesterday, our data collection has been pushed back and now until Monday of next week. We hope to deploy all systems and run it for a 24hr period. We will then add disturbances to a closed water system to observe controls stabilization at work. To test controls on pH we will take a small tank of water, add an acid, collect data; we will add a base respectively. For DO we will have water pump to a small tank, stop the pump (which will reduce DO levels), have our system take readings ("do it's thing") and see if it will turn on our circuit pump. Water volume control is a little trickier since we will have to remove water from our experiment small tank without disturbing and influencing the volume of water while arduino is collecting data. I'm not sure if I explained what we intend to do with water volume control. Essentially, using the same control/arduino package, we will control fish tank water volume using two sonars adhered to bottom part of lid. When fish tank water level falls 1/2" below bulkhead overflow, the controls circuit closes (allowing current) and pump turns on. We are making slight changes to our poster which completes the last requirement for our traning. I've included last year's poster to help serve as an example extension to what we create this year.
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