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Expiration alert is a system that notifies users of the expiration of food or medicine by changing color of a tag, avoiding consequences of eating expired food or medicine.
It is essential for users to check the expiration dates of food or medicine before their purchase, however, such check-up is not convenient or fast at present. Therefore, we propose to use tags whose material changes color after a certain period of time to alert users of the expiration dates automatically. Such tags will turn red indicating danger when food or medicine is expired. Thus, users can eat food or take medicine in a more secure and efficient way.
Wang Wei Zhou Tian Chen Xi Li Jian