Project

# Title Team Members TA Documents Sponsor
73 Sola Gratia Farm
 Cesar Martin Cachero
Jose Antonio Leiva Orcoyen
 Ruomu Hao design_document1.pdf
design_document2.pdf
design_document3.pdf
proposal1.docx
Background: Sola Gratia Farm is a community-based farm dedicated to producing locally-grown, high-quality, natural produce. Responding to the Gospel, the farm is committed to helping those who lack adequate food resources by donating a minimum of ten percent of its produce to support regional hunger programs.

Problem: Currently Solar Gratia Farm pulls power from the church located to the south of it. Because of this, the entire farm is powered off a breaker that is connected to the church’s. Sola gratia wants to add a third cooler but it will overload the amperage of the ameren line that connects from the grid to the church. Adding another line will put them on the grid as their own service line, but they don’t prefer it as they would have to pay for their electricity(instead of the church), and it could potentially expensive. It’s our task to help create a plan once they get more money that will allow them to add the third cooler without overloading their line.

Solution: Now the line has a capacity of 75A and found that when running all we reach 34-35A, but when adding a third cooler and turn all on we reach more than 75A overloading the line for a moment. To reduce this peak during the initialization we have thought on using a Variable Frequency Drive to avoid increasing so quickly the demand of power. We have also planned to add solar pannels to reduce the power needed from the line and including some batteries to store the extra energy in order to use it during the night or eventually sell it.

Criterion of success: Develop a theoric design of the current elctrical system to fulfill all the previous requirements and finally be able to include a third cooler to be implemented when economic capital be available.

Modularized Electronic Locker

Jack Davis, Joshua Nolan, Jake Pu

Modularized Electronic Locker

Featured Project

Group Member: Jianhao (Jake) Pu [jpu3], Joshua Nolan [jtnolan2], John (Jack) Davis [johnhd4]

Problem:

Students living off campus without a packaging station are affected by stolen packages all the time. As a result of privacy concerns and inconsistent deployment, public cameras in Champaign and around the world cannot always be relied upon. Therefore, it can be very difficult for victims to gather evidence for a police report. Most of the time, the value of stolen items is small and they are usually compensated by the sellers (Amazon and Apple are very understanding). However, not all deliveries are insured and many people are suffering from stolen food deliveries during the COVID-19 crisis. We need a low-cost solution that can protect deliveries from all vendors.

Solution Overview:

Our solution is similar to Amazon Hub Apartment Locker and Luxer One. Like these services, our product will securely enclose the package until the owners claim the contents inside. The owner of the contents can claim it using a phone number or a unique user identification code generated and managed by a cloud service.

The first difference we want to make from these competitors is cost. According to an article, the cost of a single locker is from $6000 - $20000. We want to minimize such costs so that we can replace the traditional mailbox. We talked to a Chinese manufacturer and got a hardware quote of $3000. We can squeeze this cost if we just design our own control module on ESP32 microcontrollers.

The second difference we want to make is modularity. We will have a sensor module, a control module, a power module and any number of storage units for hardware. We want to make standardized storage units that can be stacked into any configuration, and these storage units can be connected to a control module through a communication bus. The control module houses the hardware to open or close all of the individual lockers. A household can purchase a single locker and a control module just for one family while apartment buildings can stack them into the lockers we see at Amazon Hub. I think the hardware connection will be a challenge but it will be very effective at lowering the cost once we can massively manufacture these unit lockers.

Solution Components:

Storage Unit

Basic units that provide a locker feature. Each storage unit will have a cheap microcontroller to work as a slave on the communication bus and control its electronic lock (12V 36W). It has four connectors on top, bottom, left, and right sides for stackable configuration.

Control Unit

Should have the same dimension as one of the storage units so that it could be stacked with them. Houses ESP32 microcontroller to run control logics on all storage units and uses the built-in WiFi to upload data to a cloud server. If sensor units are detected, it should activate more security features accordingly.

Power Unit

Power from the wall or from a backup battery power supply and the associated controls to deliver power to the system. Able to sustain high current in a short time (36W for each electronic lock). It should also have protection against overvoltage and overcurrent.

Sensor Modules

Sensors such as cameras, motion sensors, and gyroscopes will parlay any scandalous activities to the control unit and will be able to capture a photo to report to authorities. Sensors will also have modularity for increased security capabilities.

Cloud Support

Runs a database that keeps user identification information and the security images. Pushes notification to end-users.

Criterion for Success:

Deliverers (Fedex, Amazon, Uber Eats, etc.) are able to open the locker using a touchscreen and a use- provided code to place their package inside. Once the package is inside of the locker, a message will be sent to the locker owner that their delivery has arrived. Locker owners are able to open the locker using a touchscreen interface. Owners are also able to change the passcode at any time for security reasons. The locker must be difficult to break into and offer theft protection after multiple incorrect password attempts.

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