Smart Onion Grading System: Integrating Temperature Control and Gas Sensing for Enhanced Quality Maintenance

Abstract

Abstract: India stands as the world's second-largest producer of onions, highlighting its significant role not just as a vegetable staple but also as a key contributor to foreign exchange earnings in the realm of fruits and vegetables. However, the variability in India's climate poses a challenge, often leading to the rot or decay of onions. Consequently, preserving onions becomes imperative, and adhering to the temperature guidelines outlined by the National Onion Association (NOA) is crucial. According to NOA, onions are best stored at temperatures ranging from 0 to 4°C alongside a humidity level of 60 to 70%. To address this issue, we have developed an onion preservation system that meticulously maintains onions within the specified parameters. Our system employs temperature and humidity sensors to continuously monitor these conditions. Utilizing a Peltier module, the system regulates the air temperature within the storage tank, ensuring it remains within the recommended range. Additionally, users gain access to up-to-date market trends pertaining to onions, enhancing their decision-making capabilities.