System for monitoring material appearance in microwave freeze drying process on line

The utility model provides a system for monitoring the appearance of a material in a microwave freeze drying process on line. The system comprises a microwave freeze-drying bin and a terahertz imagingdetection module, wherein the terahertz imaging detection module is mounted above the microwave freeze-drying bin; an objective table capable of moving relative to the microwave freeze-drying bin isarranged in the microwave freeze-drying bin; and the objective table is arranged at the imaging focus position of the terahertz imaging detection module. The system can monitor the surface structure and moisture distribution information of the microwave freeze-dried material in real time, is beneficial to adjusting the microwave power and pressure of microwave freeze-drying in time, ensures the appearance quality of the microwave freeze-dried material, and obtains a freeze-dried product with good appearance. 本实用新型提供一种在线监测微波冷冻干燥过程中物料外观的系统。该系统包括微波冻干仓和太赫兹成像检测模块，所述太赫兹成像检测模块安装于所述微波冻干仓的上方：所述微波冻干仓内设置有可相对所述微波冻干仓移动的载物台；所述载物台设置在