一种改进的绝热材料导热系数测控系统的设计  

Improved Design on Measurement & Control System for Heat Conductivity of Thermal Insulating Material

作　　者：郝丽宏[1] 林凌[1] 李刚[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《仪器仪表学报》2003年第z1期181-183,共3页Chinese Journal of Scientific Instrument

摘　　要：介绍了一种在传统防护热板法双平板装置基础上改进的测量绝热材料导热系数的设计方法 ,既可以测出在给定温度范围内材料的平均导热系数 ,又可以得到导热系数随温度的变化曲线 ,同时还可以对材料非稳态下的传热特性进行测定。本系统采用内部集成了 2 4位高精度 Δ- ∑ADC且拥有改进的 80 5 1内核的高集成混合信号元器件 MSC12 10进行信号的采集和处理 ,利用 PWM方式进行功率控制 ,人机对话界面友好 ,具有测试精度高、稳定性好。The article introduced an improved design on measurement & control system for heat conductivity of thermal insulating material based on guarded hot plate apparatus.Both average heat conductivity coefficient and the function curve with temperature can be measured,at the same time a new arithmetic can be choosed to get the unsteady heat conductivity characteristics.MSC1210,a new precision analog to digital converter (ADC) with 8051 microcontroller and flash memory,is used to process the signal.Power is controlled by PWM.Man machine conversation interface is friendly and the system is easy to operate with good stability and high precision.

关 键 词：导热系数 MSC1210 测量 控制 一维稳态传热 

分 类 号：TP21[自动化与计算机技术—检测技术与自动化装置]