防护热板法导热仪的温度控制  

Temperature Controlling for Guarded-hot Plate Devices

作　　者：王明凯 王金库[2] 王景辉[2] 张金涛[2] WANG Ming-kai;WANG Jin-ku;WANG Jing-hui;ZHANG Jin-tao(College of Quality and Technical Supervision,Hebei University,Baoding,Hebei 071002,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]河北大学质量技术监督学院,河北保定071002 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2022年第11期1431-1437,共7页Acta Metrologica Sinica

基　　金：国家市场监督管理总局计量能力提升项目(ANL1905)。

摘　　要：导热仪的温度测量和控制水平不高是导致测量结果产生偏差的重要原因。防护热板导热仪具有较大的热惯性,需要被控制温度的单元多,彼此有热传递作用,形成非线性的相互干扰,如果控制参数的整定不合适,系统各个单元的温度就会随时间波动。在国产精密工业温度计、测温仪、直流电源,LabVIEW虚拟PID控制器构成的导热仪温控系统上,分段优化整定导热仪系统PID控制参数,并研究了导热仪各部件温度控制顺序对整体控温效果的影响。实验结果表明在常温至400℃的范围,导热仪各个单元的温度被长时间稳定控制在±0.01℃以内,此参数整定方法可满足高精度防护热板导热仪的技术要求。The low level of temperature measurement and control of guarded-hot plate devices is an important reason for the deviation of measurement results.Guarded-hot plate devices inherits intrinsic thermal inertia,and multiple units being mandatory temperature controlling.Those units thermally interact via heat conduction and transfer appearing in non-linear interaction,thus,proper setting of controller parameters is critical for suppressing temperature fluctuations.On the temperature control system composed of domestic precision industrial thermometer,thermometer,DC power supply and LabVIEW virtual PID controller,the temperature control parameters of guarded-hot plate devices are studied.The PID control parameters of the system are optimized in segments,and the influence of the temperature control sequence of each component of the guarded-hot plate devices on the overall temperature control effect is studied.According to the setting parameters,in the range from room temperature to 400℃,each unit of the guarded-hot plate device can be controlled within±0.01℃in long times.The experimental results show that the parameter setting method can meet the technical requirements of high precision guarded-hot plate devices.

关 键 词：计量学 防护热板导热仪 PID控制 温度控制 参数整定 

分 类 号：TB941[一般工业技术—计量学]