Microwave moisture measurement

摘要

A moisture content measuring system for sheet material which uses microwave radiation. Two pairs of microwave radiators and receivers are combined with surface and below surface temperature measuring sensors to furnish data to a computer which interprets the data and yields moisture readings. Each pair of microwave radiator and receiver straddles the sheet test sample and checks microwave transmission through the sample and reflected from it, but the two radiators are cross polarized so that signal interchange between them is avoided.