Introduction: Car No. 05 Altered Programmed Automatic Driving Car (Full Chocolate Version)

Hi! This is Kaeru no Ojisan.

I have altered Car No.05 by lowering total car height and replacing Web Camera.

Now I can manage Tamiya TEU-104BK Speed Controller for backward driving.
Also I have solved the problem in continuous rounds driving.

The general outline of Car No.05 Altered (Full Chocolate Version) is same as that of Car No.06, but detail contents are different from that of Car No.06.

Car No.05 Altered (Full Chocolate Version) is a programmed automatic driving car using Reflective Photosensor, Gyro Sensor and Web Camera, which is composed of 4-Wheel-Steering chassis, R/C Car body and Car Top PC with 4 Arduinos and Web Camera.
I have solved the problem of Car No.06 in continuous rounds driving with revising Processing codes.

Please watch the following Car No.05 Altered test run video.
Car No.06 had failed at 3rd round. But this Car No.05 Altered has succeeded up to 11 rounds!

This video is too long, I will edit it later on.

Step 1: Material

R/C Car
- Car Body  Tamiya 8085258 Mini Cooper Monte Carlo 94 Finished Body
- Chassis  Tamiya M-03R chassis x 2
- Motor      380 motor x 2
- Attaching Jig  Kawada B57 x 2
- Servo  Futaba S3003 x 2
- Speed Controller  Tamiya TEU-104BK
- NI-Cd Battery for R/C Car  1500mAh 7.2V
- Lubic
- Plarepair

Car Top PC
- Motherboard  ZOTAC IONITX-C-J
- Memory  DDR2 2GB
- Wireless LAN  Intel Wireless WiFi Link 4965AGN
- Battery  JTT Energizer XP8000

- Arduino Duemilanove x 2
- Arduino UNO x 2
- Arduino ProtoShield Kit  DEV-07914 x 4

- Reflective Photosensor  Rohm RPR-359F x 2
- Resistance  510 ohm x 2,  47k ohm x 2

- 3-axis gyro  ITG-3200

Web Camera
- Logicool HD Pro Webcam C910

Step 2: 4-Wheel-Steering Chassis Assemble

2 sets of Tamiya M-03R chassis front unit shall be cut at the center of battery hold and glued together with plarepair.

Sorry, Step 2 to Step 8 is same as that of Car No.06.

Step 3: Relationship Table Between Steval(steering Servo Value) and TR(turning Radius)

Simulate the relationship between steval(steering servo value ) and TR(turning radius) in Excel.

Measure TR for each steval using the following Arduino and Processing codes.
Wiring note
  Servo1(front) -- D9
  Servo2(rear) -- D10
  Motor Driver -- D11

Arduino code

Processing code

Make a relationship table between steval and TR.

Step 4: Simulation Program

Utilize the relationship table in Step 3 and make a simulation program in Excel, to which car starting point, car starting direction and target passing points are input, then from which steval and car direction angles are provided as automatic driving data.

For confirmation, check by Excel Simulation Program2.

Draw the car trajectory with AutoCAD.

Step 5: Tachometers

Make Tachometers for right and left side tires with the use of Reflective Photosensor(Rohm RPR-359F) and Arduino.
Cut out circular discs from plastic plate, paint flat black, draw 6 silver lines for each disc, and attach them into front tire wheels inside.

Check the Tachometers functioning with the following Arduino and Processing codes.
Wiring note
 RPR-359F terminal1(Cathode) -- GND
                   terminal2(Anode) -- 510ohm -- 5V
                   terminal3(Collector) -- 47Kohm -- 5V
                                            also -- D5
                   terminal4(Emitter) -- GND

Arduino code

Processing code

Step 6: Gyro

Make Gyro Arduino with the use of 3-axis gyro ITG-3200 and Arduino.

Check the Gyro Arduino functioning with the following Arduino and Processing codes.
Wiring note
 SCL -- A5
 SDA -- A4
 INT -- No connect
 VIO -- 3.3V
 VDD -- 3.3V

Arduino and Processing codes (+ h, cpp, c files)

Step 7: Car Top PC With 4 Arduinos and Web Camera

Mount Car Top PC on R/C Car and Fix 4 Arduinos and Web Camera.

Step 8: Car Own Position Adjusting System Using Web Camera

Car Own Position Adjusting System is composed of 4 parts;
- Read the line on the floor using Web Camera.
- Convert the coordinates on Web Camera screen to the actual coordinates.
- Calculate Car position and direction.
- Move to the starting point.


Using the following Processing code, measure the actual X, Y coordinates and Webcam coordinates and make a conversion formula.

Processing code

First, check Web Camera only.

Processing code

Next, check the combination of Web Camera and 4 Arduinos.

Processing code

Step 9: Test Run

Processing code

The end part of automatic driving data is adjusted.
  controls[26] = new Control(1, 14, 183.8, 60, 75);
  controls[27] = new Control(2, 14, 178.9, 64, 75);
  controls[28] = new Control(1, 15, 181.4, 61, 75);
  controls[29] = new Control(2, 15, 179.0, 63, 75);
  controls[30] = new Control(1, 15, 179.0, 62, 75);
  controls[31] = new Control(3, 12, 137.2, 80, 74);
  controls[32] = new Control(2,  6, 122.4, 68, 74);

Number of lateral movement is adjusted as one cycle.

The problem of Car No.06 in continuous rounds driving seems to be caused by the different sampling period from Tachometers and Gyro.
It is better to alter both sampling time to same, but I amended the processing code to terminate and start again the serial communication every round, i.e.
  port01 = new Serial(this,"COM7",115200);
  port02 = new Serial(this,"COM9",115200);
  port03 = new Serial(this,"COM10",115200);
  port04 = new Serial(this,"COM8",115200);

Step 10: Further Consideration

I have deluded myself that every round the car must be set at the same starting point.
Further consideration, it is not necessary, since the car own position is calculated at every round.
All that’s required is to feed back the car own position obtained to Simulation Program, i.e., to convert Excel Simulation Program to Processing code.

I will reflect the above consideration and revise the Processing code.

Next one is Car No. 05 Altered (Yogurt Version).

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