Difference between revisions of "S15: Bug Rider"

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== Bug Rider ==
+
== Bug Rider==
  
 
== Abstract ==
 
== Abstract ==
−
This section should be a couple lines to describe what your project does.
+
 
 +
The "'''Bug Rider'''" is robotic toy car which is ridden by the fish in the aquarium tank on top of the vehicle!!!! Confused ???
 +
 
 +
Ok ,So the fish which is placed inside the fish tank  placed on top of the car will be moving in random directions and its movement is captured by the camera attached to the supporting frame of the vehicle.The movements are image-processed and the data is given to the "SJ-ONE BOARD" which in turn sends the wireless signals to the "SJ-ONE BOARD" present on the car which finally drives the car in that particular direction as the Hex-Bug's direction.
 +
 
 +
Below is the sample pictorial representation of  the project.
 +
 
  
 
== Objectives & Introduction ==
 
== Objectives & Introduction ==
−
Show list of your objectives. This section includes the high level details of your project. You can write about the various sensors or peripherals you used to get your project completed.
+
We are designing a prototype version of Fish on Wheels using a Mobile Camera,RC Vehicle for holding the Fish Tank setup and Sjoneboard for controlling the vehicle.Using the contrast of the fish with the bottom of the fish tank, the position is determined and used to send commands to the Sjoneboard for moving the car into that direction.
 +
We use Image Processing in Python for determining the Position of the Fish. Nordiac Wirless is used for wireless communication between RC Vehicle and Laptop. Uart Serial Communication is used for sending commands from Python to Sjoneboard.PWM driver is used for controlling the RC Vehicle.
  
 
=== Team Members & Responsibilities ===
 
=== Team Members & Responsibilities ===
 
*  [Vishnuram Venkataswamy Sampathkumar]<br>
 
*  [Vishnuram Venkataswamy Sampathkumar]<br>
−
**  <role>
+
**  <Image Processing Module>
 
*  [Krishna Sai Sevilimedu Veeravalli]<br>
 
*  [Krishna Sai Sevilimedu Veeravalli]<br>
−
**  <role>
+
**  <Nordiac Wireless & Serial Communication>
 
*  [Saketh Ram Bhamidimarri]<br>
 
*  [Saketh Ram Bhamidimarri]<br>
−
**  <role>
+
**  <Hardware Design and Integration>
 
*  [Prakash Kurup]<br>
 
*  [Prakash Kurup]<br>
−
**  <role>
+
**  <PWM Driver and testing>
  
 
== Schedule ==
 
== Schedule ==
−
Show a simple table or figures that show your scheduled as planned before you started working on the project.  Then in another table column, write down the actual schedule so that readers can see the planned vs. actual goals.  The point of the schedule is for readers to assess how to pace themselves if they are doing a similar project.
+
 
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 55: Line 62:
 
|04/28/2015
 
|04/28/2015
 
|Serial communication & Nordic wireless communication
 
|Serial communication & Nordic wireless communication
−
| align="center"|Scheduled
+
| align="center"|*Completed*
 
|-
 
|-
 
|-
 
|-
Line 61: Line 68:
 
|05/29/2015
 
|05/29/2015
 
|05/05/2015
 
|05/05/2015
−
|Platform design for the hexbug
+
|Platform design for the hexbug and building the framework to hold the camera on top
−
| align="center"|Scheduled
+
| align="center"|*Completed*
 
|-
 
|-
 
|-
 
|-
Line 69: Line 76:
 
|05/12/2015
 
|05/12/2015
 
|Ultrasonic sensor for obstacle avoidance
 
|Ultrasonic sensor for obstacle avoidance
−
| align="center"|Scheduled
+
| align="center"|*Completed*
 
|-
 
|-
 
|-
 
|-
Line 76: Line 83:
 
|05/19/2015
 
|05/19/2015
 
|Integration of complete system and testing
 
|Integration of complete system and testing
−
| align="center"|Scheduled
+
| align="center"|*Completed*
 
|-
 
|-
 
|-
 
|-
Line 83: Line 90:
 
|05/26/2015
 
|05/26/2015
 
|Final Testing and demo  
 
|Final Testing and demo  
−
| align="center"|Scheduled
+
| align="center"|*Completed*
 
|-
 
|-
 
|}
 
|}
Line 98: Line 105:
 
| align="center"|1||1||RC Car||New Bright||Jeep 9.6V||align="right"|$60.00  
 
| align="center"|1||1||RC Car||New Bright||Jeep 9.6V||align="right"|$60.00  
 
|-
 
|-
−
| align="center"|2||1||Bluetooth Camera||Adesso||CyberTrack V10||align="right"|$40.00  
+
| align="center"|2||2||SJ-One Board||NXP LPC1758||SJSU development board, LPC1758||align="right"|$160.00  
 
|-
 
|-
−
| align="center"|3||2||SJ-One Board||NXP LPC1758||SJSU development board, LPC1758||align="right"|$160.00
+
| align="center"|3||1||HexBug||Innovation First||HexBug Aquabot - Green color||align="right"|$8.96
 
|-
 
|-
−
| align="center"|4||1||HexBug||Innovation First||HexBug Larva - Green color||align="right"|$8.96
+
| align="center"|4||1||Dual H-Bridge Motor Drive||Drok||L298N||align="right"|$8.48
 +
|-
 +
| align="center"|5||1||Acrylic sheet||Tap-Plastics||Pure opaque-milky white||align="right"|$24.29
 
|-
 
|-
−
| align="center"|5||1||Dual H-Bridge Motor Drive||Drok||L298N||align="right"|$8.48
+
| align="center"|6||3||Camera holding rods||Tap-Plastics||Plastic material||align="right"|$ 17.40
 
|-
 
|-
−
| align="center"|||||'''Total Cost'''||||||align="right"|'''277.44'''
+
| align="center"|7||2||Antennas||University||10-feet range antennas||align="right"|$ 6.00
 +
|-
 +
| align="center"|8||1||Double-sided tape||Tap-Plastics||Double sided tape for plastic material||align="right"|$ 5.06
 +
|-
 +
| align="center"|9||3||Welding work and Integration of the framework||Tap-Plastics||Glass Fibre rods for the support frame||align="right"|$ 20.00
 +
|-
 +
| align="center"|10||1||Ultrasonic Sensor||Parallax||Parallax Ping Ultrasonic Sensor||align="right"|$ 35.00
 +
|-
 +
| align="center"|11||1||Hexbug Aquarium||Innovation First||Hexbug Aquabot 2.0 Harbour||align="right"|$ 35.00
 +
|-
 +
| |||||'''Total Cost'''||||||align="right"|'''$370.19'''
 
|-
 
|-
 
|}
 
|}
  
 
== Design & Implementation ==
 
== Design & Implementation ==
−
The design section can go over your hardware and software design.  Organize this section using sub-sections that go over your design and implementation.
+
 
  
 
=== Hardware Design ===
 
=== Hardware Design ===
−
Discuss your hardware design here.  Show detailed schematics, and the interface here.
+
The main components  required for this project are :
 +
 
 +
(1) A Toy Car of dimensions approximately 25*12 inches which we bought from WALMART.
 +
 
 +
(2) An Acrylic sheet of dimensions 30*15 milky white color with highest opaqueness for light bought at TAP-PLASTICS.
 +
 
 +
(3) A framework consisting of vertical rods attached to the front and back of the car and a horizontal rod which can be movable on the vertical rods.The camera will be attached right at the middle of the horizontal rod.
 +
The intention of the horizontal rod sliding on the vertical rods is to  adjust the height of the camera position relative to the platform.
 +
 
 +
(4) Ultra-sonic sensors attached at the front portion of the car to provide the obstacle avoidance feature to the car.
 +
 
 +
(5) The "SJ-ONE" board will be placed underneath the platform,in the slot provided for the batteries of the car.
 +
 
 +
(6) 9V batteries for Powering "SJ-ONE" board and RC Car.
 +
 
 +
(7) L298H Motor Driver for Controlling RC Car
 +
 
 +
*Below is the equipment required for the project
 +
 
 +
[[File:S15_244_BUGRIDER1_part1.jpg]]                [[File:S15_244_BUGRIDER1_part2.jpg]]
 +
 
 +
[[File:S15_244_BUGRIDER1_part3.jpg]]                                  [[File:S15_244_BUGRIDER1_part4.jpg]]
  
 
=== Hardware Interface ===
 
=== Hardware Interface ===
−
In this section, you can describe how your hardware communicates, such as which BUSes used. You can discuss your driver implementation here, such that the '''Software Design''' section is isolated to talk about high level workings rather than inner working of your project.
+
* The "SJ-ONE BOARD" is used for the control of DC motor and SERVO motor control using Pulse Width Modulation(PWM).
 +
 
 +
* The DC motor and the SERVO motors are connected to the "SJ-ONE BOARD" using jumper cables.
 +
 
 +
* An Antenna is attached to the "SJ-ONE BOARD" which is used for the communication with the other "SJ-ONE BOARD" connected to the laptop through Nordic Wireless Communication.
 +
 
 +
* The wireless Camera attached to the horizontal section of the framework will be capturing the movement of the Hex-Bug toy and transmitting the data to the laptop via bluetooth.
  
−
=== Software Design ===
+
*The ultra-Sonic Sensors which are placed at the front portion of the vehicle for the obstacle-avoidance feature is connected to the "SJ-ONE BOARD" through jumper cables.
−
Show your software design.  For example, if you are designing an MP3 Player, show the tasks that you are using, and what they are doing at a high level.  Do not show the details of the code.  For example, do not show exact code, but you may show psuedocode and fragments of code.  Keep in mind that you are showing DESIGN of your software, not the inner workings of it.
 
  
−
=== Implementation ===
+
* Below is the block diagram of the project:
−
This section includes implementation, but again, not the details, just the high level.  For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.
+
 
 +
[[File:S15_244_BLOCKDIAGRAM_BUGRIDER.jpg]]
 +
 
 +
=== Software Design and Implementation ===
 +
'''Image Processing'''
 +
 
 +
The Software Design is divided into two parts. The first part of the software is running in the PC end and the second part of the software is running at the SJ One Board.
 +
The first part of the software running at the PC requires the Image Processing.
 +
Image Processing:
 +
 
 +
Image processing is done by using OpenCV libraries in Python.We also use NumPy (Numerical Python) Package which is used by OpenCV for image processing.
 +
 
 +
We capture the Video frames in Python by using VideoCapture() function and convert RGB image to HSV (Hue-Saturation-Value), for extracting a colored object. In HSV, it is more easier to represent a color than RGB color-space. After converting the image to HSV color-space,image will be threshold for a range of desired object color. Position of the image is returned by using moments() function of OpenCV library. It gives centroid of the object in terms of (x,y) co-ordinates. By using the (x,y) co-ordinates, the position of the object is determined in the tracking window and send the SJone Board through Serial Communication.
 +
 
 +
pySerial package provides required libraries for serial communication in python. Desired port number is set and data is send using write() function.
 +
 
 +
Flow Chart - Image Processing
 +
 
 +
[[File:S15_244_BUGRIDER2.jpg]]
 +
 
 +
The second part of software will be running in SJone board:
 +
 
 +
We use one SJone board for transferring data from PC to another SJone board which is used in RC car for controlling the car.
 +
 
 +
The Software which is running in the SJone board which is used for transferring data through UART serial communication from PC contains a task,once the task begins executing, it waits for the serial data from the PC. On receiving the data from PC,it transfer the data to Nordic wireless function which sends the data to other SJone board.
 +
 
 +
Flow Chart - SJone board:
 +
 
 +
[[File:S15_244_BUGRIDER3.jpg]]
 +
 
 +
'''Motor Controller'''
 +
 
 +
The L298 dual H-Bridge Motor Controller is used to control the speed and direction of dc motor and servo motor respectively. Motor controller has one enable and two interrupt pins for each motor.
 +
 
 +
[[File:S15_244_L298.jpg]]
 +
 
 +
The motor controller is initialized by setting two PWM pins of SJone board to 1KHz frequency using the inbuilt functions provided Prof. Preetpal Kang (CMPE 244 instructor). Four GPIO pins are used as interrupt pins for both the dc motor and servo motor. Code snippet as follows:
 +
 
 +
[[File:S15_244_PWM1.jpg]]
 +
 
 +
 
 +
We set the GPIO pins for acceleration and steering as output as follows:
 +
 
 +
[[File:S15_244_PWM2.jpg]]
 +
 
 +
 
 +
Function to set the speed of the motor and the direction of the dc motor and servo motor is as follows:
 +
 
 +
[[File:S15_244_PWM3.jpg]]
 +
 
 +
 
 +
'''Ultrasonic Sensor'''
 +
 
 +
For this project we used an ultrasonic sensor to find the distance for obstacle avoidance.
 +
 
 +
Initially we used Seeed Studio Ultrasonic Range Finder (SEN136B5B) which is similar to PING))) Ultrasonic Distance Sensor. The sensor has has 3 pins: Vcc, GND and SIG where SIG acts as input and output at the same time.
 +
 
 +
The sensor was initially working but due to erratic voltage supply to it, the sensor somehow got burned and stopped working. So we changed the sensor to LV Maxsonar EZ ultrasonic sensor.
 +
 
 +
[[File:S15_244_ULTRASONIC2.jpg]]
 +
 
 +
The ultrasonic sensor interfaces using an ADC interface. The SJone board is equipped with an analog-to-digital converter which converts an analog signal (continuous voltage that varies over time) into corresponding digital values (discrete integers that approximate the input voltage). The 12-bit ADC operates on 3.3V which means that a voltage range between 0V and 3.3V can be divided into 212 or 4096 discrete steps. The sensor has 7 pins from which 3 pins are used to connect to the board:
 +
1. Pin "+5" on sensor to Pin "3.3V" on SJone board.
 +
2. Pin "GND" on sensor to Pin "Gnd" on SJone board.
 +
3. Pin "AN" on sensor to Pin "A0-4" on SJone board.
 +
 
 +
The sensor values are read using adc0_get_reading_function. The ADC values are then converted to voltage values and the voltage values to centimeters to measure the distance. x
 +
 
 +
[[File:S15_244_ULTRASONIC3.jpg]]
  
 
== Testing & Technical Challenges ==
 
== Testing & Technical Challenges ==
−
Describe the challenges of your project.  What advise would you give yourself or someone else if your project can be started from scratch again?
 
−
Make a smooth transition to testing section and described what it took to test your project.
 
  
−
Include sub-sections that list out a problem and solution, such as:
+
=== My Issue #1 ===
 +
We faced some issues which we would like to mention and how we overcame those.
 +
 
 +
'''Hardware items:''' After the idea was finalized and the how-to-do stuff was imagined and designed,the initial problem was to where to find the  materials,the hardware tools which would exactly meet the requirements of the project.
 +
After searching various hardware stores,we would a really nice place called the "TAP-PLASTICS" where the technician named Kevin was really helpful in his suggestions and the improvisations which can be used.
 +
 
 +
=== My Issue #2 ===
  
−
=== My Issue #1 ===
+
'''Image Processing Module:''' It took some time for us to finalize the HSV platform for detecting the Fish.We initially tried converted the image to Grey Scale Platform,but we failed to track the image.Finding a Platform for Image Processing also took sometime,as we initially tried to use C++ for Image Processing Platform,but we failed to apply image processing algorithms which in future, we will work on it.
−
Discuss the issue and resolution.
+
 
 +
=== My Issue #3 ===
 +
 
 +
'''Ultrasonic Sensor:''' We faced issues with ultrasonic sensor.Initially it worked well but due to some issues it did not give accurate values.We replaced the sensor with an higher quality sensor.The updated sensor is working accurately and helps in providing obstacle avoidance for the car.
  
 
== Conclusion ==
 
== Conclusion ==
−
Conclude your project here. You can recap your testing and problems. You should address the "so what" part here to indicate what you ultimately learnt from this project. How has this project increased your knowledge?
+
 
 +
The whole project experience was fun and very educational. At first we thought that Image Processing algorithms are available online, so just editing them will make our project work.But we learned a hard lesson that ,lot of our time would be saved if we write our own code instead of editing them.We learned to configure and use Nordic wireless module.We got to know how PWM Driver and Serial Communication works.
 +
 
 +
The project can be expanded by making it as an standlone project.We are learning to write a driver for interfacing the camera to the microprocessor,which soon we will be implementing in our project.
  
 
=== Project Video ===
 
=== Project Video ===
−
Upload a video of your project and post the link here.
+
Below is the link for our project :
 +
 
 +
https://www.youtube.com/watch?v=y4z0cLZsiMY
  
 
=== Project Source Code ===
 
=== Project Source Code ===
Line 145: Line 270:
 
== References ==
 
== References ==
 
=== Acknowledgement ===
 
=== Acknowledgement ===
−
Any acknowledgement that you may wish to provide can be included here.
+
We, the team of Bug-Rider would like to wholeheartedly thank our friend, our guide and our Professor '''Preetpal Kang''' for guiding us, encouraging us to do these projects and imparting knowledge and wisdom to us in our academics as well as for our career.Thank You Preet!
  
 
=== References Used ===
 
=== References Used ===
−
List any references used in project.
+
(1) http://www.socialledge.com/sjsu/index.php?title=Main_Page
 +
 
 +
(2) https://learn.adafruit.com/series/learn-arduino
 +
 
 +
(3) http://www.maxbotix.com/documents/LV-MaxSonar-EZ_Datasheet.pdf
  
 
=== Appendix ===
 
=== Appendix ===
 
You can list the references you used.
 
You can list the references you used.

Latest revision as of 19:20, 7 June 2015

Bug Rider

Abstract

The "Bug Rider" is robotic toy car which is ridden by the fish in the aquarium tank on top of the vehicle!!!! Confused ???

Ok ,So the fish which is placed inside the fish tank placed on top of the car will be moving in random directions and its movement is captured by the camera attached to the supporting frame of the vehicle.The movements are image-processed and the data is given to the "SJ-ONE BOARD" which in turn sends the wireless signals to the "SJ-ONE BOARD" present on the car which finally drives the car in that particular direction as the Hex-Bug's direction.

Below is the sample pictorial representation of the project.


Objectives & Introduction

We are designing a prototype version of Fish on Wheels using a Mobile Camera,RC Vehicle for holding the Fish Tank setup and Sjoneboard for controlling the vehicle.Using the contrast of the fish with the bottom of the fish tank, the position is determined and used to send commands to the Sjoneboard for moving the car into that direction. We use Image Processing in Python for determining the Position of the Fish. Nordiac Wirless is used for wireless communication between RC Vehicle and Laptop. Uart Serial Communication is used for sending commands from Python to Sjoneboard.PWM driver is used for controlling the RC Vehicle.

Team Members & Responsibilities

  • [Vishnuram Venkataswamy Sampathkumar]
    • <Image Processing Module>
  • [Krishna Sai Sevilimedu Veeravalli]
    • <Nordiac Wireless & Serial Communication>
  • [Saketh Ram Bhamidimarri]
    • <Hardware Design and Integration>
  • [Prakash Kurup]
    • <PWM Driver and testing>

Schedule

Team Schedule
Sl. No Start Date End Date Task Status
1 03/31/2015 04/07/2015 Order required components *Completed*
2 04/08/2015 04/14/2015 Image processing for object tracking *Completed*
3 04/15/2015 04/21/2015 PWM driver and motor calibration *Completed*
4 04/22/2015 04/28/2015 Serial communication & Nordic wireless communication *Completed*
5 05/29/2015 05/05/2015 Platform design for the hexbug and building the framework to hold the camera on top *Completed*
6 05/06/2015 05/12/2015 Ultrasonic sensor for obstacle avoidance *Completed*
7 05/13/2015 05/19/2015 Integration of complete system and testing *Completed*
8 05/20/2015 05/26/2015 Final Testing and demo *Completed*

Parts List & Cost

Item# Qty Description Manufacturer Part Number Total Cost
1 1 RC Car New Bright Jeep 9.6V $60.00
2 2 SJ-One Board NXP LPC1758 SJSU development board, LPC1758 $160.00
3 1 HexBug Innovation First HexBug Aquabot - Green color $8.96
4 1 Dual H-Bridge Motor Drive Drok L298N $8.48
5 1 Acrylic sheet Tap-Plastics Pure opaque-milky white $24.29
6 3 Camera holding rods Tap-Plastics Plastic material $ 17.40
7 2 Antennas University 10-feet range antennas $ 6.00
8 1 Double-sided tape Tap-Plastics Double sided tape for plastic material $ 5.06
9 3 Welding work and Integration of the framework Tap-Plastics Glass Fibre rods for the support frame $ 20.00
10 1 Ultrasonic Sensor Parallax Parallax Ping Ultrasonic Sensor $ 35.00
11 1 Hexbug Aquarium Innovation First Hexbug Aquabot 2.0 Harbour $ 35.00
Total Cost $370.19

Design & Implementation

Hardware Design

The main components required for this project are :

(1) A Toy Car of dimensions approximately 25*12 inches which we bought from WALMART.

(2) An Acrylic sheet of dimensions 30*15 milky white color with highest opaqueness for light bought at TAP-PLASTICS.

(3) A framework consisting of vertical rods attached to the front and back of the car and a horizontal rod which can be movable on the vertical rods.The camera will be attached right at the middle of the horizontal rod. The intention of the horizontal rod sliding on the vertical rods is to adjust the height of the camera position relative to the platform.

(4) Ultra-sonic sensors attached at the front portion of the car to provide the obstacle avoidance feature to the car.

(5) The "SJ-ONE" board will be placed underneath the platform,in the slot provided for the batteries of the car.

(6) 9V batteries for Powering "SJ-ONE" board and RC Car.

(7) L298H Motor Driver for Controlling RC Car

  • Below is the equipment required for the project

S15 244 BUGRIDER1 part1.jpg S15 244 BUGRIDER1 part2.jpg

S15 244 BUGRIDER1 part3.jpg S15 244 BUGRIDER1 part4.jpg

Hardware Interface

  • The "SJ-ONE BOARD" is used for the control of DC motor and SERVO motor control using Pulse Width Modulation(PWM).
  • The DC motor and the SERVO motors are connected to the "SJ-ONE BOARD" using jumper cables.
  • An Antenna is attached to the "SJ-ONE BOARD" which is used for the communication with the other "SJ-ONE BOARD" connected to the laptop through Nordic Wireless Communication.
  • The wireless Camera attached to the horizontal section of the framework will be capturing the movement of the Hex-Bug toy and transmitting the data to the laptop via bluetooth.
  • The ultra-Sonic Sensors which are placed at the front portion of the vehicle for the obstacle-avoidance feature is connected to the "SJ-ONE BOARD" through jumper cables.
  • Below is the block diagram of the project:

S15 244 BLOCKDIAGRAM BUGRIDER.jpg

Software Design and Implementation

Image Processing

The Software Design is divided into two parts. The first part of the software is running in the PC end and the second part of the software is running at the SJ One Board. The first part of the software running at the PC requires the Image Processing. Image Processing:

Image processing is done by using OpenCV libraries in Python.We also use NumPy (Numerical Python) Package which is used by OpenCV for image processing.

We capture the Video frames in Python by using VideoCapture() function and convert RGB image to HSV (Hue-Saturation-Value), for extracting a colored object. In HSV, it is more easier to represent a color than RGB color-space. After converting the image to HSV color-space,image will be threshold for a range of desired object color. Position of the image is returned by using moments() function of OpenCV library. It gives centroid of the object in terms of (x,y) co-ordinates. By using the (x,y) co-ordinates, the position of the object is determined in the tracking window and send the SJone Board through Serial Communication.

pySerial package provides required libraries for serial communication in python. Desired port number is set and data is send using write() function.

Flow Chart - Image Processing

S15 244 BUGRIDER2.jpg

The second part of software will be running in SJone board:

We use one SJone board for transferring data from PC to another SJone board which is used in RC car for controlling the car.

The Software which is running in the SJone board which is used for transferring data through UART serial communication from PC contains a task,once the task begins executing, it waits for the serial data from the PC. On receiving the data from PC,it transfer the data to Nordic wireless function which sends the data to other SJone board.

Flow Chart - SJone board:

S15 244 BUGRIDER3.jpg

Motor Controller

The L298 dual H-Bridge Motor Controller is used to control the speed and direction of dc motor and servo motor respectively. Motor controller has one enable and two interrupt pins for each motor.

S15 244 L298.jpg

The motor controller is initialized by setting two PWM pins of SJone board to 1KHz frequency using the inbuilt functions provided Prof. Preetpal Kang (CMPE 244 instructor). Four GPIO pins are used as interrupt pins for both the dc motor and servo motor. Code snippet as follows:

S15 244 PWM1.jpg


We set the GPIO pins for acceleration and steering as output as follows:

S15 244 PWM2.jpg


Function to set the speed of the motor and the direction of the dc motor and servo motor is as follows:

S15 244 PWM3.jpg


Ultrasonic Sensor

For this project we used an ultrasonic sensor to find the distance for obstacle avoidance.

Initially we used Seeed Studio Ultrasonic Range Finder (SEN136B5B) which is similar to PING))) Ultrasonic Distance Sensor. The sensor has has 3 pins: Vcc, GND and SIG where SIG acts as input and output at the same time.

The sensor was initially working but due to erratic voltage supply to it, the sensor somehow got burned and stopped working. So we changed the sensor to LV Maxsonar EZ ultrasonic sensor.

S15 244 ULTRASONIC2.jpg

The ultrasonic sensor interfaces using an ADC interface. The SJone board is equipped with an analog-to-digital converter which converts an analog signal (continuous voltage that varies over time) into corresponding digital values (discrete integers that approximate the input voltage). The 12-bit ADC operates on 3.3V which means that a voltage range between 0V and 3.3V can be divided into 212 or 4096 discrete steps. The sensor has 7 pins from which 3 pins are used to connect to the board: 1. Pin "+5" on sensor to Pin "3.3V" on SJone board. 2. Pin "GND" on sensor to Pin "Gnd" on SJone board. 3. Pin "AN" on sensor to Pin "A0-4" on SJone board.

The sensor values are read using adc0_get_reading_function. The ADC values are then converted to voltage values and the voltage values to centimeters to measure the distance. x

S15 244 ULTRASONIC3.jpg

Testing & Technical Challenges

My Issue #1

We faced some issues which we would like to mention and how we overcame those.

Hardware items: After the idea was finalized and the how-to-do stuff was imagined and designed,the initial problem was to where to find the materials,the hardware tools which would exactly meet the requirements of the project. After searching various hardware stores,we would a really nice place called the "TAP-PLASTICS" where the technician named Kevin was really helpful in his suggestions and the improvisations which can be used.

My Issue #2

Image Processing Module: It took some time for us to finalize the HSV platform for detecting the Fish.We initially tried converted the image to Grey Scale Platform,but we failed to track the image.Finding a Platform for Image Processing also took sometime,as we initially tried to use C++ for Image Processing Platform,but we failed to apply image processing algorithms which in future, we will work on it.

My Issue #3

Ultrasonic Sensor: We faced issues with ultrasonic sensor.Initially it worked well but due to some issues it did not give accurate values.We replaced the sensor with an higher quality sensor.The updated sensor is working accurately and helps in providing obstacle avoidance for the car.

Conclusion

The whole project experience was fun and very educational. At first we thought that Image Processing algorithms are available online, so just editing them will make our project work.But we learned a hard lesson that ,lot of our time would be saved if we write our own code instead of editing them.We learned to configure and use Nordic wireless module.We got to know how PWM Driver and Serial Communication works.

The project can be expanded by making it as an standlone project.We are learning to write a driver for interfacing the camera to the microprocessor,which soon we will be implementing in our project.

Project Video

Below is the link for our project :

https://www.youtube.com/watch?v=y4z0cLZsiMY

Project Source Code

References

Acknowledgement

We, the team of Bug-Rider would like to wholeheartedly thank our friend, our guide and our Professor Preetpal Kang for guiding us, encouraging us to do these projects and imparting knowledge and wisdom to us in our academics as well as for our career.Thank You Preet!

References Used

(1) http://www.socialledge.com/sjsu/index.php?title=Main_Page

(2) https://learn.adafruit.com/series/learn-arduino

(3) http://www.maxbotix.com/documents/LV-MaxSonar-EZ_Datasheet.pdf

Appendix

You can list the references you used.

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