| dc.description.abstract | The thesis proposes the design and implementation of a microcontroller based intelligent treadmill system. By detecting the back-EMF of the treadmill motor, load information, such as the jogger’s weight, gait length, and gait frequency, etc, could be analyzed after filtered properly. Without setting the speed-up or speed-down button, the treadmill would regulate its speed automatically by means of the gait information.
The photo interrupter is utilized as the speed sensor. By consult table constructed in the micro-controller, the present speed is derived. After comparing with current speed command, speed control is fulfilled by proportional controller.
As the aspect of load measurement, signals are measured by directly connecting to the DC motor power line. The jogger’s weight, gait frequency, and gait length, are found out after filtered properly. By means of the load information, jogger’s intention to change speed is determined, and the system regulates its speed command automatically without conventional button input.
The thesis could also be realized by setting a pressure board under the treadmill, visual feedback, or jogger’s blood pressure measurement. However, all mentioned above are additional devices. For the purpose of commercialization, its cost is rather high. Therefore, the proposed system is very valuable in this perspective. | en_US |