LED wheelchair motion detector
Disciplines
Bioelectrical and Neuroengineering
Abstract (300 words maximum)
When recording wheelchair motion data from a high-speed camera system it is difficult to time when the initial push of the wheelchair happens. By creating a motion detector light system, it is possible to have a bright light shine indicating the start of motion. This system was created using an Arduino as a microcontroller base. The Arduino was used in an electrical circuit with an accelerometer to create the system. By using an accelerometer, it is possible to detect motion in the x, y, z directions. The Arduino and accelerometer were wired to a small LED to produce the bright light. For the coding of the actual Arduino the pins were assigned to each variable. For the system to continue to light up a loop was created in the code to go through each of the pins and read in data. If the value of the pins coming from the accelerometer was not very large therefore indicating no motion is happening the LED will not light up. If a certain amount of motion is detected indicating the wheelchair has started moving the LED will light up for a few seconds. During the testing process the code was modified to detect motion in the direction because when mounted to the wheelchair the forward motion is in the positive z direction. The light delay had to be adjusted multiple times during testing to ensure it was long enough to see the light and fast enough to work correctly. The accelerometer also had vibration that was interfering with the data reading. To fix this issue a case was designed to hold the accelerometer and all of the wired components. The case was designed in SolidWorks and 3D printed then attached to the wheelchair.
Primary Investigator (PI) Name
Michael Hales
Additional Faculty
John Johnson, Department of Exercise Science and Sport Management, jjohn235@kennesaw.edu
LED wheelchair motion detector
When recording wheelchair motion data from a high-speed camera system it is difficult to time when the initial push of the wheelchair happens. By creating a motion detector light system, it is possible to have a bright light shine indicating the start of motion. This system was created using an Arduino as a microcontroller base. The Arduino was used in an electrical circuit with an accelerometer to create the system. By using an accelerometer, it is possible to detect motion in the x, y, z directions. The Arduino and accelerometer were wired to a small LED to produce the bright light. For the coding of the actual Arduino the pins were assigned to each variable. For the system to continue to light up a loop was created in the code to go through each of the pins and read in data. If the value of the pins coming from the accelerometer was not very large therefore indicating no motion is happening the LED will not light up. If a certain amount of motion is detected indicating the wheelchair has started moving the LED will light up for a few seconds. During the testing process the code was modified to detect motion in the direction because when mounted to the wheelchair the forward motion is in the positive z direction. The light delay had to be adjusted multiple times during testing to ensure it was long enough to see the light and fast enough to work correctly. The accelerometer also had vibration that was interfering with the data reading. To fix this issue a case was designed to hold the accelerometer and all of the wired components. The case was designed in SolidWorks and 3D printed then attached to the wheelchair.