Project
| # | Title | Team Members | TA | Documents | Sponsor |
|---|---|---|---|---|---|
| 13 | Sun Tracking Umbrella |
Dora Stavenger Megan Cubiss Sarah Wilson |
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| Team Members - Dora Stavenger (doraas2) - Sarah Wilson (sarahw7) - Megan Cubiss (mcubiss2) Problem When sitting outside in urban third spaces, it is often too hot or bright to stay there for a while. Even at low temperatures, exposure in direct sun gets uncomfortable and/or unhealthy quick. Many outdoor spaces do have stationary umbrellas but, once set, they only help for a period of time which can lead to discomfort from excessive heat/brightness. This can be avoided by adjusting the umbrella throughout the day but they are often quite heavy and hard to maneuver. Solution Overview To solve this problem, we suggest an umbrella that tracks the position of the sun using solar panels in addition to other sensors and adjusts the tilt of the umbrella to provide UV protection for the user and ensure comfort. To prove out this concept we are proposing to make a smaller model of an umbrella, using resources from the machine shop as well as doing some design ourselves. We will also do the math to prove that our design could be scaled up and withstand the extra load from the heavier weight of a real umbrella. Solution Subsystems ##Subsystem 1: Model Umbrella This subsystem is the mechanical basis for the project: The canopy would be scaled to about that of a personal rain umbrella. The rain umbrella would attach to an elbow joint allowing for tilting motion. The base would attach to a stable plate and a bearing allowing for circular motion. ##Subsystem 2: Solar Cells / Brightness Sensors This subsystem would be responsible for powering the umbrella as well as provide data on light intensity. A ring of solar cells towards the widest portion of the umbrella as well as solar cells towards the top. Solar cells power moving mechanisms as well as provide backup power through battery storage. Light intensity is measured using these solar cells to determine optimal positioning. ##Subsystem 3: Motor for Solar Angle Tracking This subsystem would be responsible for tilting the canopy of the umbrella: A stepper motor would be used due to low speed, high torque application. Physical stop built in for added safety so the canopy does not fall. Motor control done using H-bridge. ##Subsystem 4: Motor for Solar Position Tracking This subsystem would be responsible for rotating the entire umbrella: A stepper motor would be used in order to keep design consistent. Motor control done using separate H-bridge from Subsystem 3. ##Subsystem 5: wifi/bluetooth/communication This subsystem is responsible for the communication between the physical device on the umbrella and a user’s phone/application. Using a ESP32, a web server can be established which can be connected to a laptop/display via the existing wifi abilities. This would allow two way data communication where data could be viewed in a simple web browser with some sort of user interface to allow commands to be pushed back to the microcontroller. This would also allow users on the same network to access the page and interact with the device. Criterion for Success Outcomes : A scaled version of the working product with the proof that it is scalable to a full sized version. The umbrella tilts based on differences in intensity detected by the solar cells. The umbrella is structurally sound and does not fall over during any motion. Data from the solar cell is displayed and user input is possible. Hardware : The device does not get in the way of user experience. Solar cells send accurate data to software components. Motors respond accordingly to change umbrella positioning. Software : Data from solar cells are accurately received and processed by software. Software to determine how umbrella positioning is to move for optimal coverage. Accurately disperses information for motor movement. |
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