|本期目录/Table of Contents|

 防护热板法快速测量物质导热系数(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2017年3期
页码:
193-198
栏目:
精密测量
出版日期:
2017-05-15

文章信息/Info

Title:
 Fast Measurement of Thermal Conductivity Based on Guarded
Hot Plate Method
文章编号:
1672-6030(2017)03-0193-06
作者:
 索亚运 李艳宁
 (精密测试技术及仪器国家重点实验室(天津大学), 天津300072)
Author(s):
 Suo Yayun Li Yanning
 (State Key Laboratory of Precision Measuring Technology and Instruments (Tianjin University), Tianjin 300072, China)
关键词:
  防护热板法 导热系数 稳态判断 卡尔曼滤波
Keywords:
 guarded hot plate thermal conductivity steady state determination Kalman filter
分类号:
TP89
DOI:
10.13494/j.npe.20150139
文献标识码:
A
摘要:
 防护热板法(guarded hot plate, GHP)是测量隔热材料导热系数最精确的方法,此方法的传统系统稳态判断方法耗时长,采用的时间间隔固定,导致整体测量时间较长.为了缩短测量时间,本文提出一种基于动态周期识别的系统稳态判断方法,对热板加热功率进行卡尔曼平滑滤波和动态周期识别,变固定时间间隔为动态时间间隔,再对连续测量的4组导热系数进行判断,使其实时准确地反映系统的测量状态.利用此判断方法对绝热材料标准参比板的导热系数进行了测量,结果表明,测量时间缩短了大于25%,测量效率明显提高.
Abstract:
Guarded hot plate (GHP) method is the most accurate method of measuring thermal conductivity of insulation materials. The traditional method of determining system steadystate is timeconsuming, and the time interval is invariant, leading to longer measurement time. To shorten measurement time, this paper proposes a method based on dynamic periodic identification to determine the system steadystate. The heat power of hot plate was smoothed by Kalman filter and its fluctuation period was identified, so the time interval changed from static to dynamic, and four groups of thermal conductivity continuously measured were determined, which could reflect the system measurement state realtimely and accurately. Based on this method, the thermal conductivity of standard reference material for insulation material approved by The China National Institute of Standardization was measured. Results show that the measurement time is shortened by more than 1/4, and the measurement efficiency is improved significantly.

参考文献/References

备注/Memo

备注/Memo:
收稿日期: 2016-04-20.
作者简介: 索亚运(1990—),男,硕士研究生.
通讯作者: 李艳宁,教授,yanningli@tju.edu.cn.
更新日期/Last Update: 2017-07-11