便携电容式棉花含水量测量仪  

Portable Capacitive Moisture Meter for Measuring Moisture in Cotton

作　　者：胡智宏[1] 邹琳[1] 

机构地区：[1]郑州轻工业学院电气工程学院,河南郑州450002

出　　处：《仪表技术与传感器》2008年第7期19-21,共3页Instrument Technique and Sensor

基　　金：河南省自然科学基金(0611050200)

摘　　要：电容器容值大小与极板间材料的介电常数有关,用聚酰亚胺湿敏材料为介质构成测量电容,电容容值反映棉花含水量,据此原理设计了棉花含水量测量仪,介绍了测量探头主要组成部分及测量原理,分析了电容测量电路,给出了测量仪电路框图和主程序流程。解决了测量仪电路框图和主程序流程。解决了电阻测量法检测干燥棉花精度不足的问题,测量仪功耗低,体积小,符合便携要求。According to the capacity of capacitor depending on the dielectric constant, a portable capacitive moisture meter for measuring moisture in cotton was designed. The measuring principle of the capacitive moisture meter was analyzed, the measuring probe and the hardware circuit of the capacitive moisture meter were designed, and the measuring program was given. The capaci- tive moisture meter greatly improves the measure accuracy, comparing with the resistance moisture meter. The capacitive moisture meter with low power meets the requirement of the portable products.

关 键 词：棉花含水量 测量探头 电容测量 

分 类 号：TH873.7[机械工程—仪器科学与技术]