This paper describes a new sensor for high moisture measurement in producing green tea. The sensor is based on the microwave transmission technique. It uses a microstripline, on which tea leaves under test are overlaid. A microwave signal at 3 GHz was transmitted along the line, and attenuation and phase shift of the wave were measured. The moisture content of the leaves was calculated by a new idea of using the ratio of two signals corresponding to the attenuation and the phase shift. The sensor measured a moisture content range from 155 to 320% on a dry basis.
This paper describes a new sensor for the production of green tea. It can measure the moisture content as high as 160 to 300% on dry basis by use of microwave at 3 GHz. The wave traveling down along a microstripline detects the information on the moisture contents of the green tea leaves overlaid on the microstripline. The moisture content of the leaves is calculated from two signals of the ratio of attenuation and phase shift of the waves traveling over the microstripline. The error of the measurement was about 3% of the readings.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.