Fruit ripeness detection based on miniature spectral sensor

Abstract

Due to the problems of short shelf life and poor taste of immature fruits, a reasonable judgment of fruit maturity in the process of fruit picking and transportation can not only promote the development of China's fruit industry, but also is very important for China's fruit export trade. This device is a miniature spectrometer designed with C12666MA as the spectral sensor. It can collect and process the spectral signal of fruit surface pigment, communicate with Android smart phone through ESP32, draw on the smart phone APP and analyze the spectral data, so as to achieve the purpose of detecting fruit maturity. In the process of the experiment, the spectral signal of chlorophyll in the epidermis of different fruit varieties was detected. The detector could meet the measurement requirements and realize nondestructive testing. It also has the advantages of easy to carry, low cost and high precision.