HomeDLSU Engineering Journalvol. 18 no. 1 (2006)

Microcontroller-Based Safety Spotter for Body Building Bench Press Exercise

Marco Alejandro D. De Leon | Cristina Coreen B. Ignacio | Jason Ron M. Ticzon | Claire M. Uy | Ann E. Dulay

Discipline: Engineering, Technology



The ultrasonic sensor and QTERM were used to acquire input data such as the arm's length of the person using the system, the number of repetitions, and the value of the weights. The signal from the sensor and QTERM is sent to the micro controller. The micro controller activates the actuator and solenoid when spotting is needed. Spotting will be done once the output from the sensor indicates that the speed of the lifting is slow, stalled for 3 seconds going up and 2 seconds going down, or when the displacement from the chest to the sensor is at its minimum point, which is set in this study to 3 inches [Hermano, 2003], [De Larrazabal, 2003, Temida, 2003].