Model of Vaccine Monitoring and Warning System of Cold Storage Units

Abstract

Vaccine monitoring is an important task that is currently done in the ministry of health of Palestine. It is done using data loggers that measure and store cold storage temperatures and then it’s logged manually three times a day (during work time) by health workers in public health clinics. This way is not efficient in handling cases when the temperature is not within the acceptable range (2-8) C after the end of the workday of health workers. It is also costly in matters of time and effort, and is prone to human errors.

We aim through this project to solve those problems to ensure the efficiency of the vaccine management system by building a low cost model that monitors and logs vaccine cold storage unit temperatures then issues warnings in cases that may affect the quality of vaccines to ensure a timely response from authorized personnel who are responsible of handling those issues . Our intended method of reaching those aims is by building a system that monitors temperatures of cold storage units using two devices: a transmitting device, and a receiving device.

The transmitting device contains a temperature sensor. It also has an LDR sensor to ensure that cold storage unit doors are closed tightly after being opened by health workers. Data from both sensors are sent to the receiving device via Bluetooth. The receiving device has an Arduino Mega microprocessor which checks if temperature is between 2C and 8C, if otherwise it issues a warning. It also issues a warning when the battery percentage is less than 20% and when the temperature sensor stops working efficiently, . Warnings are issued using GSM SIM900 module. in addition the device has a website designed for logging the temperatures of storage units.

After implementing the system, our system is able to work 24/7, measure temperature, and light the LED strip while the unit door is open, upload temperatures to dedicated website, show temperature value, battery levels and system component issues on the TFT screen. Finally, it issues a warning when the previously mentioned unsuitable conditions occur.