The problem SMART MECHANICAL VENTILATOR solves

The automated ventilator that we design should work efficiently with constant working speed so that we can keep up with the data bases like,what will be the exact amount of air that will be delivered during a single cycle or throughout the process,the oxygen-carbon dioxide ratio inside the bag valve.This system works on negative air pressure air delivery mode.This system consist of three parts-namely BVM(bag valve mask),a stepper motor and its driver and the sensors that are used to measure the health parameters and other working parameters like air delivery,motor position .The air delivery rate should be flexible as the tidal volume will differ for different age group people.The stepper motor will be operated using stepper motor driver and its speed can be controlled by varying the VREF value of the stepper motor driver.These changes can be done during the run time of the ventilator with the help of the switches attached to the dashboard.The stepper motor is used to move the 3D printed hand with a constant speed through a timing belt.The motor will be installed in the one end and pulley on other end of the aluminium exclusion.The pulley and motor works together to move the 3D printed hand which is helpful in compressing and decompressing the bag .Pulse oximeter sensor is used to measure the oxygen level in our blood and according to the oxygen level,the speed of the stepper motor will be adjusted. .A pressure sensor is used to measure the pressure inside the bag valve mask.There is a limit switch also attached alongside the motor which acts as a limit setter for the motor movement.If the metal strip is displaced from the bag valve mask,then the pressure applied on the bag valve mask will be decreased and the air delivery will be decreased which leads to inadequate air delivery to the patient.To avoid this,the limit switch is placed.We believe that ,our project very efficient in saving the valuable lives of many patients.

Challenges we ran into

The biggest challange we met while working in this project is varing the speed of the NEMO 17 stepper motor.The speed of the stepper motor is varied using the stepper motor driver.The VREF (reference volatge)is changed in order to the change the speed of the stepper motor.The problem is due to the temperature sensitivity of the stepper motor driver.The stepper motor driver will be burnt ,if higher voltage is given.Hence,the VREF value palys an important role in proper working of the automated ventilator.The second problem is interfacing the limit switch.W e tackled both the problem step by step and now all the bugs have been removed and our project is in proper working condition.