Method for intelligently judging freeze-drying sublimation/analysis transformation points of fruits and vegetables

• Main Authors: ZHANG MIN, ARUN MUJUMDAR, YU DONGXING, LIU WENCHAO, YU WANSHUAI
• Format: Patent
• Language: Chinese; English
• Published: 02.11.2021
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for intelligently judging freeze-drying sublimation/analysis transformation points of fruits and vegetables, which comprises the following steps of: respectively establishing a relation model between nuclear magnetic imaging spectrum information and fruit and vegetable moisture content and a relation model between a near infrared spectrum and fruit and vegetable moisture content, predicting freeze-drying fruit and vegetable samples with unknown moisture content by utilizing the established relation models, and comparing output values of the two models judge a sublimation/analysis transformation point in the fruit and vegetable freeze-drying process, intelligently feeding back a judgment result to a freeze-drying parameter control center, and carrying out intelligent control over drying parameters. According to the method, the low-frequency nuclear magnetic resonance and the near infrared spectrum are combined, so that the prediction precision of the freeze-drying sublimation/a