Project

# Title Team Members TA Documents Sponsor
29 Automatic Drone Wireless Charging Station
 Jason Wuerffel
Pranshu Teckchandani
Samuel Fakunle
 Matthew Qi design_document1.pdf
design_document2.pdf
final_paper1.pdf
photo1.jpeg
photo2.jpeg
presentation1.pdf
proposal2.pdf
proposal1.pdf
video
# Title
**Automatic Drone Wireless Charging Station**

Team Members:
- Samuel Fakunle (sof2)
- Pranshu Teckchandani (pat4)
- Jason Wuerffel (jasonmw2)

# Problem

Drone technology is becoming more vital for our modern society because it improves productivity and precision for several applications. Despite this, the operation time continues to be a key technological challenge because of the drone’s battery life limitations. As a result, our project aims to address this issue by implementing an automated drone charging system that extends the drone’s flight time without human intervention.

# Solution

Our group aims to use resonant inductive coupling to develop a wireless drone charging station that allows the drone to land and charge its battery within an acceptable distance from the transmitter. In addition, our implementation should allow for efficient charging anywhere or in multiple locations on the charging pad, indicate when sufficient charging has been completed, and should start power transfer only when the drone lands on the pad. We may also add an optional feature where the drone can track back to the pad when low on battery but it is an additional feature we will implement only if time permits.

# Solution Components

## Subsystem 1: DC-AC Converter to Transmission Coil

This inverter is responsible for converting DC power to AC power for the activated transmitting coil

- Circuit consisting of resistors, capacitors, inductors, switches, etc.
- Could use renewable power supply or power bank (undecided)


## Subsystem 2: Transmitting and Receiving Coil for Charging

This subsystem focuses on the coils used in order for contact to be made between the drone and charging station.

- Both coils made of metal (likely aluminum or copper)
- Transmitting coil keeps the drone an adequate distance above the ground and is constrained by the size of the drone
- Receiving coil attached to drone acts as secondary part of transformer
- Charging pad made up of several transmitting coils to allow for no need for precise landing
- Microcontroller will be used to determine the optimal transmitting coil from the transmitting coil array on the charging pad in order to achieve maximum efficiency. This would be done by calculating each coil’s input impedance, and then activating the coil that results in the highest input impedance. The microcontroller will indicate when charging is complete using an LED indicator
- If time permits, we could develop an app that shows charging progress of the drone

Microcontroller: https://www.digikey.com/en/products/detail/espressif-systems/ESP32-DEVKITC-VIE/12091811?utm_adgroup=&utm_source=google&utm_medium=cpc&utm_campaign=PMax%20Shopping_Product_Low%20ROAS%20Categories&utm_term=&utm_content=&utm_id=go_cmp-20243063506_adg-_ad-__dev-c_ext-_prd-12091811_sig-CjwKCAiA8NKtBhBtEiwAq5aX2Nvf7wYlrJvAtHab7cw0ecC0E7rdqjRA_Iy8-0jjQLlCNVKipQhMVRoCslsQAvD_BwE&gad_source=1&gclid=CjwKCAiA8NKtBhBtEiwAq5aX2Nvf7wYlrJvAtHab7cw0ecC0E7rdqjRA_Iy8-0jjQLlCNVKipQhMVRoCslsQAvD_BwE


## Subsystem 3: AC-DC Converter

This subsystem includes a full bridge rectifying circuit with a low pass filter. Converts AC power from the receiving coil to DC power for the voltage regulator

- Circuit consists of resistors, diodes, capacitors, inductors, etc.

## Subsystem 4: Voltage regulator

This subsystem will be a voltage regulator responsible for supplying regulated DC power to the drone’s battery.

## OPTIONAL(IF TIME PERMITS) - Subsystem 5: Drone Control System

This subsystem includes the sensors that allow the drone to find its way back to the charging station.

- Proximity sensors for drone to know when it is close to charging station
- Low battery indicator
- Tracking tags and camera to detect the charging station

Proximity Sensor - https://www.digikey.com/en/products/detail/sharp-socle-technology/GP2Y0E02B/4103879?utm_adgroup=&utm_source=google&utm_medium=cpc&utm_campaign=PMax%20Shopping_Product_High%20ROAS%20Categories&utm_term=&utm_content=&gad_source=1&gclid=CjwKCAiA8NKtBhBtEiwAq5aX2OJn1KocKkbImYp4gjIzr5wiMJSYczVw6uVYCuu517q7w6XyPQFocxoCQjMQAvD_BwE

# Criterion For Success - Base Project

1. Successful Conversion: Converter circuits are able to correctly convert DC to AC and vice versa.
2. Wireless Power Transfer: Charging pad is able to charge the drone efficiently without human intervention. We will have a lower bound for acceptable efficiency.
3. Battery Indicator : The charging pad indicates when the battery is completely charged.
4. Charging only in close proximity: Start charging only when the charging pad detects that the drone is in close proximity.

If do complete the above criteria in time, we will try to accomplish the following:

- (Optional) Navigational Success: Drone is able to navigate to the charging station and dock.

GYMplement

Srinija Kakumanu, Justin Naal, Danny Rymut

Featured Project

**Problem:** When working out at home, without a trainer, it’s hard to maintain good form. Working out without good form over time can lead to injury and strain.

**Solution:** A mat to use during at-home workouts that will give feedback on your form while you're performing a variety of bodyweight exercises (multiple pushup variations, squats, lunges,) by analyzing pressure distributions and placement.

**Solution Components:**

**Subsystem 1: Mat**

- This will be built using Velostat.

- The mat will receive pressure inputs from the user.

- Velostat is able to measure pressure because it is a piezoresistive material and the more it is compressed the lower the resistance becomes. By tracking pressure distribution it will be able to analyze certain aspects of the form and provide feedback.

- Additionally, it can assist in tracking reps for certain exercises.

- The mat would also use an ultrasonic range sensor. This would be used to track reps for exercises, such as pushups and squats, where the pressure placement on the mat may not change making it difficult for the pressure sensors to track.

- The mat will not be big enough to put both feet and hands on it. Instead when you are doing pushups you would just be putting your hands on it

**Subsystem 2: Power**

- Use a portable battery back to power the mat and data transmitter subsystems.

**Subsystem 3: Data transmitter**

- Information collected from the pressure sensors in the mat will be sent to the mobile app via Bluetooth. The data will be sent to the user’s phone so that we can help the user see if the exercise is being performed safely and correctly.

**Subsystem 4: Mobile App**

- When the user first gets the mat they will be asked to perform all the supported exercises and put it their height and weight in order to calibrate the mat.

- This is where the user would build their circuit of exercises and see feedback on their performance.

- How pressure will indicate good/bad form: in the case of squats, there would be two nonzero pressure readings and if the readings are not identical then we know the user is putting too much weight on one side. This indicates bad form. We will use similar comparisons for other moves

- The most important functions of this subsystem are to store the calibration data, give the user the ability to look at their performances, build out exercise circuits and set/get reminders to work out

**Criterion for Success**

- User Interface is clear and easy to use.

- Be able to accurately and consistently track the repetitions of each exercise.

- Sensors provide data that is detailed/accurate enough to create beneficial feedback for the user

**Challenges**

- Designing a circuit using velostat will be challenging because there are limited resources available that provide instruction on how to use it.

- We must also design a custom PCB that is able to store the sensor readings and transmit the data to the phone.