Diseño y construcción de una banda caminadora con suspensión torácica para paciente con parálisis cerebral infantil

Abstract

The project is based on the use of a conventional treadmill with a dual belt. The movement is provided by the bands, the rotation and speed control of the motors, while a third motor facilitates the lifting of the patient using a reel on the motor shaft, winding and unwinding the cable through 3 pulleys. For autonomous rotation control, a rotary encoder sensor is incorporated that monitors the position in which the motor changes direction. The control of the motors is carried out using H bridges to regulate the speed and rotation of each motor using signals controlled by pulse width modulation. To power the electronic components, it is carried out through a transformer that converts 120V to 15V of alternating current. This is achieved using a diode bridge and RC filter that smoothes the signal, converting it from alternating current to direct current to supply power to the electronic components. Finally, field tests are carried out during a period of 2 weeks in which the recommended operating parameters are determined, as well as the eventual comparison with the parameters established by the manufacturer, this allows establishing a percentage of average power in which the machine will carry out its operations safely.