In this activity, students are introduced to the fields of engineering and engineering technology/technician, and how control systems bring together the multiple functions to operate the device.
Introduction:
E.Q.: What is a control system and what fields of engineering use control systems?
Preparation Needed for the Activity:
Insect-o-Bot
Part 1 - Investigate Fields of Engineering and Engineering Technology/Technician: 15-20 min
Have students investigate a career in Engineering
The following site provides a complete look at the fields of Engineering and Engineering Technology and see how control systems are a part of many of the fields (https://www.bls.gov/ooh/architecture-and-engineering/home.htm)
As a warm-up/engagement activity, have students answer the following questions about a career in Engineering
What is the minimum required degree for entry to a career in the fields of Engineering and Engineering Technology?
What are the two differences related to a career in Electrical Engineering or Engineering Technology/Technician?
What is the salary average for a professional starting a career in the fields of Engineering compared to Engineering Technology/Technician?
Part 2 - The Insect-o-Bot Control System: 15-20 min
The control system is divided into two subgroups: Movement control and Data input control
Movement control - the system that controls the drive and motion of the device.
For our Insect-o-Bot, the movement control system runs the motors based on a designed program. The movement control is run through the Arduino and the motor control board. The program runs the motors based on the speed input, from the Micro:bit and for a set amount of time or rotation as set in the Arduino program.
Data Input control - the system that manages the input and transmission of the data from the sensors in a device.
For our Insect-o-Bot, the data input control system runs through the Micro:bit board and stores the data on the board for use to see what happened during a run. We will be looking at our data during the Investigation challenge.
The data from the Motor Encoder runs to the Screw Shield board and is then sent to the Micro:bit from the Tx port. This allows the Micro:bit to receive the rotation information that we see in our data table and graphs.
The data from the Line Sensor is collected directly to the Micro:bit to show when each line is crossed.
Figure 1. Micro:bit Board
Part 3 - The Insect-o-Bot Control System Operation and Data Retrieval: 20-30 min
How to run the Insect-o-Bot (refer to Figure 1 for visual representation)
Turn on the power switch
Press the Select Button on the Micro:bit (button A) to select the desired speed (as seen in the image above)
Place the robot at the starting point desired
Press the Start button on the Micro:bit (button B) to begin, there will be a 3 second countdown (as seen in the image above)
Robot completes the run
Using the usb cable plug into the computer and the robot
Open the Micro:bit, which shows up as a usb drive on your computer
Select My_Data and save to your computer using the file name for that run. Ex. Speed#Run#Date
Open the file by double clicking and the data will appear as a webpage with a table
View the graph by clicking on Visual Preview
If you would like more information about this unit, please refer to 8th Grade Course Preparation and Robot Rescue Robots