Compact and automated sensing systems are needed to monitor plant health for NASA’s controlled-environment space crop production. A new hyperspectral system was designed early detection of stresses using both reflectance fluorescence imaging in visible near-infrared (VNIR) wavelength range (400–1000 nm). The prototype mainly includes two LED line lights providing VNIR broadband UV-A (365 nm) li...

In this work, we report a non-destructive and non-contacting ultrasound system with novel air-coupled transducer to continuously monitor the drying process of prickly pear (nopal) pads in lab environment. Compared conventional imaging spectroscopic methods or electrical-based approaches, ultrasound-based are non-invasive, cost-effective, suitable for large volume evaluation. The time-dependent ...