Vol.3 No.3 2010
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Research paper : National electrical standards supporting international competition of Japanese manufacturing industries (Y. Nakamura et al.)−222−Synthesiology - English edition Vol.3 No.3 (2010) Discussions with Reviewers1 Overall assessmentComment (Katsuhisa Kudo, Safety and Environmental Protection Division, AIST)You clearly defined the R&D goal in response to the demand of industry, and the scenario for standard dissemination all the way to the industrial site is very clear. The R&D was conducted according to a clear research road map based on the research potential that you accumulated over the years, while understanding the developments conducted at the NMIs around the world. Then, you established a highly original, world’s top-level capacitance standard. You also developed an effective standard dissemination method to disseminate the primary measurement standard to the industrial sites, and contributed in establishing the traceability system for the capacitance standard that is one of the best in the world.Comment (Akira Ono, AIST)The development of the national standards for capacitance and the dissemination of these standards to the industrial sites are described in a birds-eye view along with the scenario. This is an excellent paper of the Type 2 Basic Research and Product Realization Research. It is not just the development of the national standards with the highest precision; the idea and the realization of the remote calibration to disseminate the standards to the industrial sites efficiently and rationally are also excellent outcomes of this research.2 In reference to overall electrical standardComment (Katsuhisa Kudo)The content of this paper is limited to capacitance standard. I got the impression that you are stating that the capacitance standard is particularly important in supporting the international competition of the manufacturing industries. In general, I think it is positioned as one of the core electrical standards, but does it have higher demand from industry compared to the voltage, current, or resistance standards? I think you should briefly refer to this in the “Introduction” to help the readers’ understanding.Answer (Yasuhiro Nakamura)This paper focuses on the capacitance standard on which the authors have been mainly working to describe the scenario and the result of the R&D. As you indicated, capacitance is one of the core electrical standards, but other electrical standards such as the ones for voltage and resistance are also vital for supporting the international competition of the manufacturing industries. However, I thought the content may become unfocused if I talked about voltage and resistance standards, so in this paper, I intentionally emphasized the capacitance standard. As you indicated, I should discuss other electrical quantities in the “Introduction”, and I added and revised the text accordingly.3 Number of current calibration labsQuestion (Katsuhisa Kudo)In “2.2 Scenario for the dissemination of standard to industrial sites”, the hierarchical structure of the calibration labs is shown in Fig. 1. You later mention three JCSS calibration labs, but it is unclear how many layers of Japanese calibration labs there are, or the number of calibration labs in each layer. Can you add some more figures in your explanations?Answer (Yasuhiro Nakamura)For the electrical standard, about 50 labs are accredited as the JCSS calibration labs. There are nine uppermost calibration labs (three labs for capacitance only) as shown in Fig. 1, and others are second-tier labs or below. I added the numbers of calibration labs to the text.[14][15][16][17][18]Conference Digest 2004, 608-609 (2004).A. Yonenaga, A. Domae and Y. Nakamura: Standard capacitor calibration using the four terminal-pair impedance bridge and evaluation of its uncertainties, Sansoken Keiryohyojun Houkoku (AIST Bulletin of Metrology), 6 (2), 101-117 (2007) (in Japanese).S. Sakagami: 4Tanshitsui Kyapashitansu Burijji no Seibi (Organization of a four-port capacitance bridge), JEMIC Keisoku Sakuru Nyusu (JEMIC Metrology Circle News), 32 (3), 16-17 (2003) (in Japanese).Y. Nakamura, A. Yonenaga, N. Sakamoto and A. Shimoyama: Remote calibration of standard inductors, IEEJ Trans. FM, 126, 1183-1186 (2006).Y. Nakamura: Teishuha Impidansu no Enkaku Kosei Ni Tsuite (On remote calibration of low-frequency impedance), JEMIC Keisoku Sakuru Nyusu (JEMIC Metrology Circle News), 36 (1), 1-6 (2007) (in Japanese).S. Matsuzawa, T. Shimodaira, K. Hanaoka, A. Shimoyama, S. Sakagami, A. Domae, K. Kito and Y. Nakamura: Feasibility study on remote calibration of impedance standards for industrial use, CPEM Conference Digest 2008, 348-349 (2008).AuthorsYasuhiro NakamuraCompleted the doctoral course at the Graduate School of Engineering, Doshisha University in March 1994. Doctor (Engineering). Joined the Electrotechnical Laboratory, Agency of Industrial Science and Technology (current AIST) in April 1994. Became Section Chief of Electricity Standards Section 1, Electricity and Magnetism Division, National Metrology Institute of Japan (NMIJ) in October 2005; Division Head of Electricity and Magnetism Division, NMIJ in April 2007; and Principal Researcher of NMIJ in April 2009. Engages in R&D and standard provision of various electrical standards including the capacitance standard. Senior Principal Planning Officer of Planning Headquaters in October 2010. Received the Ichimura Prize in Technology (for Contribution) in 2002. In this paper, was in charge of the development of the capacitance standard based on quantized Hall resistance, the development of the remote calibration method for LCR standard, and planning and organization of the overall concept.Atsushi DomaeGraduated from the Department of Electric and Electronic Engineering, Toyohashi Institute of Technology in March 2000. Joined the Electrotechnical Laboratory, Agency of Industrial Science and Technology (current AIST) in April 2000. Became the researcher of Electricity and Magnetism Division, NMIJ in April 2001, and person-in-charge of capacitance and AC resistance calibration in May 2006. Engages in R&D and standard dissemination of the capacitance and AC resistance standards. In this paper, was in charge of the development of the medium capacitance expansion system.

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