1. School of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiagn 310018, China
2. Center for Advanced Measurement Science, National Institute of Metrology, Beijing 100029, China
3. Electronic Information College. Qingdao University, Qingdao, Shandong 266071, China
Abstract The conventional Johnson noise thermometer with switchs is time-consuming and requires carefully matching of the transmission lines. A quantum-voltage-calibrated superposition thermometer to eliminate the switchs was proposed. In this configuration, matching the transmission lines is not necessary and the sense resistor can be increased to improve the signal to noise ratio. The system included a quantum voltage noise source, low-noise and low-distortion amplifiers, low-pass filters, and high performance analog to digital converters. A fourth-order fitting to eliminate the transmission line effects was used to obtain the thermodynamic temperature. Confirmatory experiments in thermostatic laboratories showed that the relative deviation between the measured temperature value and the nominal temperature value is 0.027% and the uncertainty is 0.16%, which demonstrated the feasibility of the proposed method.
［1］邓小龙, 孙建平, 乐凯, 等. 退火对标准铂电阻温度计性能影响的研究 ［J］. 计量学报, 2015, 36(1): 26-30.
Deng X L, Sun J P, Yue K, et al. The Annealing Effect on the Performance of the Standard Platinum Resistance Thermometer ［J］. Acta Metrologica Sinica. 2015, 36
(1): 26-30.
［2］梁志国, 吕国义, 尹肖, 等. 一种适用于现场原位校准的双输入激励方法［J］. 计量学报, 2019, 40(1): 140-145.
Liang Z G, Lu G Y, Yin X, et al. A Novel on Site Calibration Method by Using Double Stimulations［J］. Acta Metrologica Sinica, 2019, 40
(1): 141-145.
［3］Kisner R A. Development of a Johnson Noise Thermometer for Nuclear Power Use ［R］. International Nuclear Energy Research Initiative, Final project report, 2005.
［4］Nyquist H. Thermal agitation of electric charge in conductors ［J］. Phys Rev, 1928, 32: 110-113.
［5］Nam S W, Benz S P, Dresselhaus P D, et al. Johnson noise thermometry measurements using a quantized voltage noise source for calibration［J］. IEEE Trans Instrum Meas, 2003, 52(2): 550-554.
［6］White D R, Benz S P. Constraints on a synthetic-noise source for Johnson noise thermometry ［J］. Metrologia, 2008, 45(1): 93-101.
［7］张建强, 屈继峰, 付云丰, 等. 量子电压标定的噪声温度计系统设计［J］. 传感器与微系统, 2012, 31(9): 83-85.
Zhang J Q, Qu J F, Fu Y F, et al. Design on noise thermometer system with quantum voltage calibration ［J］. Transducer and Microsystem Technologics, 2012, 31(9): 83-85.
［8］付云丰. 四通道噪声温度计系统设计［D］. 北京: 中国计量科学研究院, 2013.
［9］付云丰, 屈继峰, 张建强, 等. 噪声温度计中新型数字相关器设计［J］. 计量学报, 2014, 35(4): 335-338.
Fu Y F, Qu J F, Zhang J Q, et al. Design of a New Digital Correlator in The noise thermometer ［J］. Acta Metrologica Sinica, 2014, 35(4): 335-338.
［10］Qu J F, Benz S P, Coakley K, et al. An improved electronic determination of the Boltzmann constant by Johnson noise thermometry ［J］. Metrologia, 2017, 54(4): 549-558.
［11］Bramley P, Cruickshank D, Pearce J. The Development of a Practical, Drift-Free, Johnson-Noise Thermometer for industrial applications ［J］. Int J Thermophys, 2017, 38(2): 25.
［12］White D R, Benz, S P, Labenski, J R, et al. Measurement time and statistics for a noise thermometer with a synthetic-noise reference ［J］. Metrologia, 2008, 45(4): 395-405.
［13］周琨荔, 屈继峰, 张钟华, 等. 交流量子电压标准综述［J］. 计量学报, 2017, 38(4): 486-491.
Zhou K L, Qu J F, Zhang Z H, et al. The Status of AC Quantum Voltage Standards ［J］. Acta Metrologica Sinica, 2017, 38(4): 486-491.
［14］王曾敏, 高原, 李红晖. 交流约瑟夫森电压合成装置的研究［J］. 计量学报, 2012, 33(2): 154-157.
Wang Z M, Gao Y, Li H H. Research on AC Josephson Voltage Synthesis Device ［J］. Acta Metrologica Sinica. 2012, 33(2): 154-157.
［15］周贞宇, 屈继峰, 周琨荔, 等. 基于噪声温度计的铟凝固点热力学温度研究［J］. 计量学报, 2019, 40(5):804-809.
Zhou Z Y, Qu J F, Zhou K L, et al. Thermodynamic Temperature Measurement of the Indium Freezing Point with Johnson Noise Thermometry［J］. Acta Metrologica Sinica, 2019, 40(5):804-809.
2020, Vol. 41 
