时间戳服务到UTC(NIM)的溯源方法研究  

Research on the traceability method of time stamp service to UTC(NIM)

作　　者：张宇 贾正森[2] 龙波[1] 王玉琢[2] Zhang Yu;Jia Zhengsen;Long Bo;Wang Yuzhuo(Institute for Metrology and Calibration of Guizhou,Guiyang 550003,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]贵州省计量测试院,贵阳550003 [2]中国计量科学研究院,北京100029

出　　处：《仪器仪表学报》2024年第2期176-183,共8页Chinese Journal of Scientific Instrument

基　　金：国家重点研发计划(2021YFF0600102);贵州省科技计划(黔科合支撑[2019]2881号)项目资助。

摘　　要：原子时标国家计量基准UTC(NIM)由中国计量科学研究院维护和保持,溯源至协调世界时(UTC),是统一全国时间频率量值的最高依据。随着信息技术的不断发展,时间戳服务被广泛应用于司法、医疗、金融、电子商务、知识产权等领域。根据我国在贸易结算、医疗等领域对法制计量的需求,时间戳机构(TSA)提供的时间应溯源至UTC(NIM)以实现国内统一和国际互认。本文提出使用一种校准器对TSA提供的时间进行远程和本地评估。实验结果表明,在局域网进行本地校准时,TSA与UTC(NIM)时间偏差的不确定度(k=2)小于2 ms;在广域网环境下,即使校准器与TSA之间相距超过1000 km,TSA与UTC(NIM)时间偏差的不确定度(k=2)小于713 ms。The time and frequency primary standard UTC(NIM)is maintained by the National Institute of Metrology(NIM)in China,and is traceable to the international time scale coordinated universal time(UTC).With the continuous development of information technology,time stamp service is widely used in justice,health,finance,electronic commerce,intellectual property,etc.According to the Chinese government′s demand for legal metrology in areas such as trade settlement and medical,the time provided by time stamp authority(TSA)should be traced to UTC(NIM)for domestic unification and international equivalence.This article proposes a calibrator to remotely and locally evaluate the traceability of TSA to UTC(NIM).When local calibration is implemented on the LAN,the uncertainties(k=2)of the time offsets between UTC(NIM)and TSA are generally less than 2 ms.The uncertainties(k=2)of the time offsets between UTC(NIM)and TSA located in Beijing are generally less than 713 ms on the WAN environment,even if the distance between the calibrator and TSA exceeds 1000 km.

关 键 词：时间戳 校准 溯源性 

分 类 号：TB939[一般工业技术—计量学] TH714[机械工程—测试计量技术及仪器]