Design of Wood Moisture Assessment and Detection Sensors Based on Spoof Surface Plasmon Polaritons

Abstract

Accurate moisture content detection is crucial for maintaining the quality and value of wood, as it can prevent shrinkage and swelling. The microwave method is a non-destructive, contactless detection technique for objects, which has been widely studied. This article presents a method for detecting moisture content in wood using Spoof surface plasmon polaritons (SSPPs) and a detachable sensor structure. The sensor can load removable label wood blocks to achieve detection of moisture content in various types of wood. Simulation experiment results demonstrate that the sensor has a fixed cut-off frequency when the label block is fixed. The cut-off frequency decreases if the moisture content of tested is higher than that of the label block, indicating that the proposed method is effective for screening wood that does not meet moisture content standards, on the contrary, the cut-off frequency does not generate offsets. The proposed detection method and system are feasible, and this research has practical applications in the field of wood processing.

Keywords

• Cut-off frequency
• microwave transmission method
• spoof surface plasmon polaritons (SSPPs)
• wood moisture content