First-Year Engineering Program

Advanced Energy VehicleExternal Sensors

Reference: AEV Lab Manual External Sensors Grading

Guidelines

First-Year Engineering ProgramAEV Project Objective(Problem Definition)

INITIAL CONCEPTS(Brainstorming)

EXPERIMENTAL RESEARCH

ANALYZE

DESIGN DECISION

RESEARCH

COMPARE

FINAL DESIGN

Present AEV Design

PT 1PT 2PT 3PT 4

(System Analysis)(Programming)

First-Year Engineering Program

Lab Objectives The objectives of this lab are:1. Become familiar with the external

sensor hardware components Become familiar with troubleshooting

techniques2. Program the function calls in

controlling the AEV using external sensors

First-Year Engineering Program

External Sensors The importance of external sensors on

the AEV is to provide real-time information being provided to the Arduino for autonomous vehicle operation This is known as feedback control.

The sensor that will be the focus of today’s lab is the Reflectance Sensor

First-Year Engineering Program

Reflectance Sensors The sensor will produce a low voltage

due to the reflectance of the aluminum tape and produce a high voltage due to the dark color of the wheel.

First-Year Engineering Program

Mounting the Sensor Make sure to use the small #2 bolt and

zip tie to securly mount the sensor on the opposite side of the wheels on the vertical support

The closer the sensor is to the wheel, the better voltage reading the sensor will usually have. Optimal distance for readings is 3 mm as

illustrated.

Optimum Too far away

First-Year Engineering Program

Making the Connections Take careful consideration where

reflectance sensor is attached to the Arduino!!

READ AEV Lab Manual For proper orientation

pin connections

ASK if uncertain!

Sensor Connection

First-Year Engineering Program

External SensorsExternal Sensors Lab Procedure Guidelines:

The following slides are a summary of the procedure guidelines and the basic command for the reflective sensor

First-Year Engineering Program

Arduino Programming Sensor Command

Available Command

goToMark(wc); One Argument; works specifically with reflectance

sensor wc = wheel counts

Example:

motorSpeed(4,30); **Sets all motor speeds to 30% full powergoToMark(44); **Continues the last command for 44

wheel counts. Each wheel has 8 counts. Circumference = 3.902 inches

Therefore, (44 marks)*(3.902/8 inches) = 21.46 inches traveled.

First-Year Engineering Program

Arduino Programming Basics LabLab Activity

Follow Lab Procedure document

Team: Install reflectance wheel count sensor to the

sample AEV Follow AEV Lab Manual Testing the Reflectance

Sensor Get instructional team verification

Individual: Program the following commands requested in

procedure document and run the program on the Desktop Stand

First-Year Engineering Program

Arduino Programming Basics LabLab Activity cont.

Follow Lab Grading Guidelines

Individual: Reprogram the requested commands Get instructional team verification

Team: Reprogram the requested commands Verify program and sensor on Desktop Stand Get approval to operate on Classroom Stand and

Test Follow PROPER TESTING PROCEDURE Get instructional team verification Make sure to include in your TEAM summary

report