Design and Implementation of a Safe Medical Box to Maintain Insulin Pens in Good Conditions

Diabetes is becoming one of the most relevant medical problems in today's world. The insulin pen is a largely used medication to limit the effects of this disease. However, this tool must be reserved in good conditions in order to maintain its efficiency. A very important parameter is the ambient temperature where the insulin pen is placed. The below system provides a solution to monitor and to control the temperature of the insulin pen. It consists of creating a portable medical box with two chambers where new and in-use pens are placed. Based on the temperature of these chambers, a control unit acts to heat up or to cool down the chamber temperature, therefore, the insulin pen reaches again the desirable temperature range. Concerning the applied tools, temperature and object detector sensors have been used to detect the presence of the insulin pen whereas a Peltier device was used to heat up/cool down the chamber temperature. Polystyrene was also implemented in the design of the chamber to create more isolation to the system. In order to increase electrical safety and system accuracy, some components' redundancy has been applied, mainly at the level of the processing unit and the temperature sensor. The system was tested for several hours while phone application notifications were registered when the chamber temperature was outside the acceptable range. Regarding the control process, tests have shown that the system works well and is very accurate.