First-Year Engineering Program Advanced Energy Vehicle External Sensors Reference:  AEV Lab Manual  External Sensors Grading Guidelines

First-Year Engineering Program AEV Project Objective (Problem Definition) INITIAL CONCEPTS (Brainstorming) EXPERIMENTAL RESEARCH ANALYZE DESIGN DECISION RESEARCH COMPARE FINAL DESIGN Present AEV Design PT 1 PT 2 PT 3 PT 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 techniques 2.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 Sensors External 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(w c );  One Argument; works specifically with reflectance sensor  w c = wheel counts  Example: motorSpeed(4,30); **Sets all motor speeds to 30% full power goToMark(44); ** Continues the last command for 44 wheel counts.  Each wheel has 8 counts. Circumference = inches  Therefore, (44 marks)*(3.902/8 inches) = inches traveled.

First-Year Engineering Program Arduino Programming Basics Lab Lab 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 Lab Lab 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