| 基于LC谐振传感器的包装茶叶含水率无损检测 |
| |
| 引用本文： | 韩安太,郭小华,陈志强,孙延伟.基于LC谐振传感器的包装茶叶含水率无损检测[J].茶叶科学,2009,29(5). |
| |
| 作者姓名： | 韩安太 郭小华 陈志强 孙延伟 |
| |
| 作者单位： | 1. 中国计量学院电工与电子技术研究所,浙江,杭州,310018
2. 杭州职业技术学院,浙江,杭州,310018 |
| |
| 摘 要： | 介绍一种基于经典电路理论的无线、无源LC谐振传感器设计,并将其用于包装茶叶含水率的快速、无损检测。所提出的LC谐振传感器实质上是一个印刷在湿敏绝缘衬底上的单一平面电容和螺旋电感构成的谐振电路,通过将传感器放置在茶叶包装袋内,由于包装袋内湿度变化会引起平面电容的电容值变化,进而导致传感器的并联谐振频率变化,利用连接在包装袋外部含水率测量仪上的感应线圈远程检测传感器的谐振频率值,即可通过谐振频率的变化间接确定包装茶叶的含水率;实验结果表明了该检测方法合理可行,与国标方法相比较,测量结果无明显偏差,解决了包装茶叶含水率快速、准确、无损检测的难题。
|
| 关 键 词： | 茶叶 含水率 无损检测 电容传感器 谐振电路 |
Research on Non-Destructive Measure of Moisture Content for Packaged Tea Based on the LC Resonant Sensor |
| |
| HAN An-tai,GUO Xiao-hua,CHEN Zhi-qiang,SUN Yan-wei.Research on Non-Destructive Measure of Moisture Content for Packaged Tea Based on the LC Resonant Sensor[J].Journal of Tea Science,2009,29(5). |
| |
| Authors: | HAN An-tai GUO Xiao-hua CHEN Zhi-qiang SUN Yan-wei |
| |
| Abstract: | The design of a wireless, passive LC resonant sensor based on classic circuit theory, and its application for quick, non-destructive measured of moisture content of packaged tea were described in this paper. The proposed LC resonant sensor is an inductive-capacitive resonant circuit, which is made of a single planar capacitor and spiral inductor printed on a humidity-sensitive insulating medium substrate. To measure the moisture content of packaged tea, the LC resonant sensor is embedded inside the tea package. As the variation of the humidity inside the tea package, the humidity-sensitive insulating medium substrate absorbs the water vapor, and the planar capacitor’s capacitance and the sensor’s resonant frequency were changed, which is remotely detected through a coil connected to the instrument for measuring moisture content outside the tea package. Therefore, the moisture content of packaged tea can be indirectly determined by measuring the change in sensor’s resonant frequency. The experiment results showed that the proposed method is reasonable, and is comprised with the GB method, no significant deviation is found between the measuring results. The difficult technological problem in how to quick, accurate and non-destructive measuring moisture content of packaged tea is solved. |
| |
| Keywords: | tea moisture content non-destructive measurement capacitive sensor resonant circuit |
| 本文献已被 万方数据 等数据库收录！ |
|
