CAJ | 학술논문

基于平行热线法的测量原理，在加热电路中串联一个限流电阻，使加热过程中由于热线温升引起电阻增大造成的功率变化减小至0．6％，提高测量精度；采用铂电阻温度传感器代替传统的热电偶实现温度测量，用于低温下的温度测量，扩大导热系数测量范围。采用这种测量方法，搭建绝热材料导热系数的测量平台，测量硬质聚氨酯泡沫塑料的导热系数，与国家玻璃纤维产品质量监督检验中心的鉴定结果对比，其相对误差在5％以内，验证了改进的平行热线法的正确性。
기우평행열선법적측량원리，재가열전로중천련일개한류전조，사가열과정중유우열선온승인기전조증대조성적공솔변화감소지0．6％，제고측량정도；채용박전조온도전감기대체전통적열전우실현온도측량，용우저온하적온도측량，확대도열계수측량범위。채용저충측량방법，탑건절열재료도열계수적측량평태，측량경질취안지포말소료적도열계수，여국가파리섬유산품질량감독검험중심적감정결과대비，기상대오차재5％이내，험증료개진적평행열선법적정학성。
Based on the measuring principle of parallel hot wire method,a current limiting resistor is cascaded in the heating circuit to reduce the power variation to 0.6%,which is caused by resistance increases due to the hotline temperature rise in heating process,with the measurement accuracy improved.Platinum resistance temperature sensor is used to replace the tra-ditional thermocouple to achieve temperature measurement,which can be used in low temperature and expand the scope of the thermal conductivity measurement.Ameasuring platform of insulation material's thermal conductivity is built,with the thermal conductivity of rigid polyurethane foam measured.Compared with the identification results of National Glass Fiber Product Quality Supervision and Inspection Center,the relative error is less than 5%,so the correctness of the improved par-allel hot wire method is verified.