Project :: ECE 445 - Senior Design Laboratory

#	Title	Team Members	TA	Documents	Sponsor
6	Automated Intelligent Document Stamping System with Machine Vision Integration	Jiaheng Zeng Peter Chen Xuliang Huang Zhiqiang Qiu		proposal1.pdf	Fangwei Shao
	This project aims to design and build a mechatronic system capable of automating the manual process of stamping multi-page documents. By integrating UI interface, machine vision, and an automatic page-turner, the system will eliminate repetitive labor and ensure precise and convenient stamp placement. The main work of mechanical task is to build X-Y positioning arms so the stamp head can move on the XY plane and press at the target location. And paper feeding and output path are also required. Similar to a printer, a pickup roller brings one sheet to the stage for stamp. After stamping, an output roller pushes the sheet to the exit tray. In the UI interface, the users can learn how to use this machine. And then, the users may choose different document stamping modes in the UI interface (we may develop different modes based on the demands). Functional Requirements: 1. Motion Control: • XY-axis movement to cover standard or non-standard page sizes (usually A4/Letter). • Z-axis pressure detection for the adjustable stamping motion. 2. Vision & Logic: • Mode A (Content-Aware): Detect text content and stamp in appropriate open spaces. • Mode B (Keyword): Recognize specific characters (OCR) and stamp at a relative offset. • Combine a VLM and a camera to achieve stamping location detection. 3. Pages Handling: • Separate paper to ensure feeding only one paper into the stamping stage and withdrawing paper from the stamping stage. The whole process should avoid jamming and be transparent to the users for validation. 4. User Interaction: • Software interface to select modes, input keywords, and monitor progress. Goal: Ultimately, we hope this project can help our ZJUI administrative staffs to liberate their hands from repetitive stamping tasks, saving their time.

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# TEAM MEMBERS

Chentai Yuan (chentai2)

Guanshujie Fu (gf9)

Keyi Shen (keyis2)

Yichi Jin (yichij2)

# TITLE OF THE PROJECT

Digital Controlled LED Rotating Display System

# PROBLEM

By visual persistence phenomenon, we can display any images and strings with a rotating LED array. Many devices based on this idea have been developed. However, there are some common issues to be solved. First, the images or strings to be displayed are pre-defined and cannot be changed in a real-time way. Second, the wired connection between some components may limit the rotation behavior, and harm the quality of display. Some economical wireless communication technologies and new ways to connect components can be applied to achieve a better display and real-time image update.

# SOLUTION OVERVIEW

We aim at developing a digital controlled LED rotating display system. A servo motor is controlled to drive the stick with one row of LED to do circular rotation. The connection between LEDs, control circuit, motor and other components should be simple but firm enough to suppose good display and high-speed rotation. Moreover, there is another part to handle users’ input and communicate with the display part via Bluetooth to update images in a real-time and wireless way.

# SOLUTION COMPONENTS

## Subsystem1: Display Subsystem

- LED Array that can display specific patterns.

- Controller and other components that can timely turn the status of LEDs to form aimed patterns.

## Subsystem2: Drive Subsystem

- Servo motor that drive of the LED array to do circular rotation.

- Controller that communicates with the motor to achieve precise rotation and position control.

- An outer shell that has mechanisms to fix the motor and LED array.

## Subsystem3: Logic and Interface Subsystem

- Input peripherals like keyboard to receive users’ input.

- A FPGA board for high-level logics to handle input, give output and communicate with other subsystems.

- Wireless communication protocol like Bluetooth used in communication.

- VGA display hardware offering Graphical User Interface.

# CRITERION OF SUCCESS

- Users can successfully recognize the real-time patterns to be displayed.

- It achieves the precise rotation and position control of motor.

- The motor can drive the LED array and any necessary components to rotate stably and safely.

- The LED array is under real-time control and responds rapidly.

- The communication between components has low latency and enough bandwidth.

# DISTRIBUTION OF WORK

- Chentai Yuan(ME): Mechanisms and servo motor control.

- Guanshujie Fu(CompE): Logic and Interface design and keyboard & VGA display implementation.

- Keyi Shen(EE): Wireless communication and servo motor control.

- Yichi Jin(EE): Circuit design, keyboard & VGA display implementation.