Microwave based wheat grain kernel characterisation

A low-cost microwave source and detector is designed to drive a microwave cylindrical cavity to determine the wet mass and moisture content of single wheat grain kernels. Differences in wet mass and moisture content can be distinguished from the changes in resonant frequency and attenuation. Moisture content (8% to 16%) of single wheat grain kernels was measured. Experimental results are presented and the calibration equations are implemented in a microcontroller. Wet mass and moisture content are shown on an LCD display on the microcontroller. The measurement procedure and evaluation of the system are presented in the proposed paper.