Project

# Title Team Members TA Documents Sponsor
79 Camera Positioning System
Area Award: Interdisciplinary Work
 Jialu Li
Junjiao Tian
Weicheng Jiang
 John Capozzo design_document0.pdf
final_paper0.pdf
presentation0.pdf
proposal0.pdf
This project will be a continuation of a MechSE senior design project from last semester.
Overview: the project is a camera positioning system for MechSE Prof. Chamorro’s research lab and is sponsored by John Deere. It consists of 4 independently controlled quadrants each housing a camera. The camera is able to translate in a vertical plane and pan and tilt.
Video Presentation:
https://drive.google.com/open?id=0B6mrm2dk90clVWtuejZkeUFtRm8
Document:
https://drive.google.com/open?id=0B_mCq_Vejy2jWXRuZmdJanY4OFU

Problem statement:
The current prototype lacks several important features. The first one is homing and auto-calibration of the y-z gantry tables. Currently, the in-plane positioning system does not have a homing function and calibration is done manually. The second feature is the angular position feedback from the pan-tilt heads. The control is completely open-loop currently and is not very accurate in angular positioning.
The previous mechanical team has completed the physical construction of the platform. Minimum software and hardware development were done to move the gantry table and pan-tilt heads. For example, at current stage, a user is able to translate and pan & tilt a camera from a computer user interface in LABVIEW.
Next Step is to design circuits to achieve more advanced and essential features for this product. The features include auto-calibration, homing and position feedback from both the linear movement and angular movement. These functions were not included in the prototype due to the lack of electrical engineers on the team.

Homing and auto-calibration of the gantry table:
We plan to implement a logic circuit with appropriate sensors to realize homing and auto-calibration of the system. The circuit should signify the controller whenever desired position is reached and also cut off the operation if physically limit is reached. We are still exploring different homing techniques. Additional encoders might be added to the stepper motors to accurately record the traveling distance.
Currently we are considering shock sensor (PKGS-00LDP1-R).
CNC machine homing example:
https://www.youtube.com/watch?v=PvkDSsccnBY

Pan-tilt head angle positioning:
We plan to implement a control circuit with either a inclinometer chip (ADS16201) or angular position chip (HMC-1501) to realize angular position feedback of the pan-tilt heads. The circuit module should be compact to fit onto a pan-tilt head and individually powered due to the size of the project.
Sensor information:
http://www.futureelectronics.com/en/sensors/gyro.aspx

Power Unit:

Currently, the prototype has three power inputs to power 8 stepper motors, 8 servo motors and a controller respectively. They all have different power requirements. We want to design a power regulator circuit to power all three at the same time with just one power input from the wall.

NEMA 23 Stepper motor
http://openbuildspartstore.com/nema-23-stepper-motor/:

HS-785HB Servo motor:
https://www.servocity.com/hs-785hb-servo

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.

Project Videos