Preprint Communication Version 1 This version is not peer-reviewed

Monitoring Moisture Content for Various Kind of Tea Leaves in Drying Processes Using RF Reflectometer-Sensor System

Version 1 : Received: 13 August 2018 / Approved: 14 August 2018 / Online: 14 August 2018 (04:13:50 CEST)

A peer-reviewed article of this Preprint also exists.

You, K.Y.; Lee, C.Y.; Chan, K.S.; Lee, K.Y.; Cheng, E.M.; Lee, Y.S. Monitoring Moisture Content for Various Kind of Tea Leaves in Drying Processes Using RF Reflectometer-Sensor System. Instruments 2018, 2, 18. You, K.Y.; Lee, C.Y.; Chan, K.S.; Lee, K.Y.; Cheng, E.M.; Lee, Y.S. Monitoring Moisture Content for Various Kind of Tea Leaves in Drying Processes Using RF Reflectometer-Sensor System. Instruments 2018, 2, 18.

Journal reference: Instruments 2018, 2, 18
DOI: 10.3390/instruments2030018

Abstract

This paper presents tea leaves moisture monitoring system based on RF reflectometry techniques. The system was divided into two parts which are the sensor and reflectometer parts. The large coaxial probe was used as a sensor of the system. The reflectometer part plays a role as signal generator and also data acquisition. The reflectometer-sensor system was operated with a graphical user interface at 1.529 GHz at room temperature. The system was able to measure the moisture content of tea leaves ranging 0% m.c to 50% m.c on a wet basis. In this study, up to five kinds of tea leaves bulk were tested. The mean of absolute errors in the moisture measurement for tea leaves was ±2.

Subject Areas

tea leaves; microcontroller-based RF reflectometer; large open-ended coaxial probe; reflected voltage; moisture content

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