Project

# Title Team Members TA Documents Sponsor
51 PHOTOVOLTAIC POWER GENERATION CHARGER
 Guangjun Xu
Sunhao Zhang
Xu Li
# PHOTOVOLTAIC POWER GENERATION CHARGER

## 1. PROBLEM DEFINITION AND MOTIVATION

With the increasing demand for clean and sustainable energy, photovoltaic power generation has become an important solution for reducing dependence on conventional fossil fuels. However, in many daily and small-scale applications, electrical devices still rely heavily on grid power or disposable batteries, which may increase energy costs and create environmental burdens.

This project aims to develop a photovoltaic power generation charger that can convert solar energy into electrical energy and use it to charge electronic devices or rechargeable batteries. The system focuses on collecting solar energy through photovoltaic panels, regulating the output power, and delivering stable charging performance under different light conditions.

The project demonstrates a complete renewable-energy-based charging process, from solar energy collection to electrical energy conversion and battery charging. Its success will be evaluated based on whether the system can efficiently harvest solar energy, provide stable voltage and current output, and charge target devices safely and reliably with minimal external power support.

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## 2. SOLUTION OVERVIEW

The proposed solution integrates solar energy harvesting, power regulation, and battery charging into a unified charging workflow. A photovoltaic panel captures sunlight and converts it into electrical energy. Since the output of the panel may vary depending on sunlight intensity, a power management circuit is used to regulate the generated energy and provide a stable electrical output.

After regulation, the charging system delivers suitable voltage and current to the target load, such as a rechargeable battery or a low-power electronic device. The system may also include a monitoring function to display charging status, output voltage, current level, or battery condition. In this way, the project performs both energy conversion and device charging as a complete renewable power application.

The feasibility of the system is supported by the availability of standard hardware components such as photovoltaic panels, charge controllers, voltage regulators, batteries, and monitoring modules, as well as mature circuit design methods for energy conversion and charging control.

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## 3. SYSTEM ARCHITECTURE AND COMPONENTS

### PHOTOVOLTAIC ENERGY COLLECTION MODULE

The photovoltaic energy collection module uses a solar panel to capture sunlight and convert it into electrical energy. The output power depends on environmental conditions such as light intensity and panel orientation. This module serves as the primary energy source of the system.

### POWER REGULATION AND CONTROL MODULE

This module receives the electrical energy generated by the photovoltaic panel and regulates it into a stable and usable form. It may include voltage regulation, current control, and protection functions to ensure safe and efficient charging. It coordinates the overall energy flow and maintains proper operating conditions for the charger.

### ENERGY STORAGE AND CHARGING MODULE

The energy storage and charging module is responsible for storing electrical energy in a rechargeable battery or directly charging an external device. Based on the regulated output, the module manages the charging process to improve charging efficiency and protect the battery or load from overcharging or unstable input power.

### MONITORING AND OUTPUT MODULE

After power conversion and charging, the system provides the final output to the target device or storage unit. This module may also display system information such as solar input condition, charging status, battery level, or output voltage and current. It completes the final delivery and user interaction step of the photovoltaic charging system.

High Noon Sheriff Robot

Yilue Pan, Shuting Shao, Yuan Xu, Youcheng Zhang

Featured Project

# MEMBERS:

- Yuan Xu [yuanxu4]

- Shuting Shao [shao27]

- Youcheng Zhang [yz64]

- Yilue Pan [Yilvep2]

# TITLE:

HIGH NOON SHERIFF ROBOT

PROBLEM:

Nowadays with the increasing number of armed attacks and shooting incidents. The update for public places needs to be put on the agenda. Obviously, we could not let police and security to do all the jobs since humans might neglect some small action of threat behind hundreds of people and could not respond quickly to the threat. A second of hesitation might cost an innocent life. Our team aims on making some changes to this situation since nothing is higher than saving lifes not only victims but also gunners. We find some ideas in the Old western movies when two cowboys are going to a high noon duel, the sheriff will pull out the revolver quicker than the other and try to warn him before everything is too late. If we can develop a robot that can detect potential threats and pull out weapons first in order to warn the criminal to abandon the crime or use non-lethal weapons to take him down if he continues to pull out his gun.

# SOLUTION OVERVIEW:

In order to achieve effective protection in a legal way, we have developed the idea of a security robot. The robot can quickly detect dangerous people and fire a gun equipped with non-lethal ammunition to stop dangerous events.

The robot should satisfy the following behavioral logic:

- When the dangerous person is acting normally and there is no indication of impending danger, the robot should remain in standby mode with its robot arm away from the gun.

- When the dangerous person is in a position ready to draw his gun or other indication of dangerous behavior, the robot is also in a drawn position and its arm is already clutching the gun.

- When the dangerous person touches his gun, The robot should immediately draw the gun, move the hammer and finish aiming and firing to control the dangerous person. This type of robot would need to include three subsystems: Detection system, Electrical Control system, and Mechanical system.

# SOLUTION COMPONENTS:

## [SUBSYSTEM #1: DETECTION SUBSYSTEM]

This subsystem consists of a camera and PC. We are going to use YOLO v5 to detect object, determine the position of human and the gun. Use DeepSORT to track the object, let the camera follow the opponent. Use SlowFast to detect opponent’s behavior.

## [SUBSYSTEM #2: ELECTRICAL CONTROL SYSTEM]

This subsystem consists of a STM32, two high speed motors, two gimbal motors, one motor for revolver action and position sensor. The STM32 serves as the controller for the motors. The high speed motor will be used to move the mechanical grab to grab the revolver and pull it out as fast as possible so that it will use the position sensor as the end stop point instead of PID control. The gimbal motors serve as Yaw and Pitch motion for the revolver to control the accuracy of the revolver so that it needs encoders to give the angle feedback.

## [SUBSYSTEM #3: MECHANICAL SYSTEM]

This subsystem consists of a three-degree-of-freedom robot arm and a clamping mechanism fixed to the end of the arm. The clamping mechanism is used to achieve the gripping of the gun, the moving of the hammer and the pulling of the trigger. The mechanical arm is used to lift and aim the gun.

# CRITERION FOR SUCCESS

- Move Fast. The robot must draw its gun and aim faster than the opponent；

- Warning First. If opponent’s hand moves close to the gun on his waist, the robot should draw the gun and aim it at the opponent without firing. If the opponent gives up drawing a gun and surrender, the robot should put its gun back in place. Otherwise, the robot will shoot at the opponent.

- Accurate shooting. Under the premise that the opponent may move, the robot must accurately shoot the opponent's torso.

# DISTRIBUTION OF WORK

- EE Student Shuting Shao: Responsible for object detection and object tracking.

- EE Student Yuan Xu: Responsible for behavior detection and video processing.

- EE Student Youcheng Zhang: Responsible for electrical control system.

- ME Student Yilue Pan: Responsible for the Mechanical system.