一种基于电学法的高准度水汽透过率测试模型

Development of high-accuracy water-vapor transmission rate test model using electrical method

针对传统电学法水汽透过率(water vapor transmission rate,WVTR)测试高精度、低准度的问题,提出了一种电流分布特性修正的高准度WVTR测试模型,并基于此测试模型设计了一套完整的、易于使用的WVTR测试系统.系统硬件采用了便于维护的高适应性夹具、全封闭测试环境等设计,软件采用了多线程、时间误差补偿、自适应修正等算法.理论分析和实际测试结果表明,修正后的WVTR测试模型及测试系统实现了兼具使用成本低和高精度、高准度的设计目标.

A high-precision problem of the traditional electrical method for determining the water-vapor transmission rate(WVTR)was analysed,and a high-accuracy WVTR test model with current distribution characteristics correction was developed.Based on the test model,a complete and simple WVTR test system was designed.The system hardware required high-adaptive fixtures for easy maintenance and a fully enclosed test environment,and the software included multi-threading,time-error compensation,and adaptive correction algorithms.The theoretical analysis and experimental test results showed that the modified WVTR test model and system satisfied the design requirements of low costs,high precision,and high accuracy.