The measurement of the Planck constant, h, is entering a new phase. The CODATA 2010
recommended value is 6.626 069 57× 10− 34 J s, but it has been a long road, and the trip is …

Abstract In 2011, the General Conference on Weights and Measures (CGPM) confirmed its
intention to adopt new definitions for four of the base units of the SI based on fixed numerical …

Since 1889, the international prototype of the kilogram has served as the definition of the
unit of mass in the International System of Units (SI). It is the last material artefact to define a …

The advantage of the joule balance over the classic watt balance is that the dynamic
measurement in the watt balance is replaced by a static measurement, which makes the …

The magnet system is an essential component of the Kibble balance, a device that is used to
realize the unit of mass. It is the source of the magnetic flux, and its importance is captured in …

The joule balance experiment has been carried out at the National Institute of Metrology,
China (NIM) since 2007. By the end of 2013 the first generation of the joule balance (NIM-1) …

A capacitive sensor is proposed to measure the departure from the vertical movement. It has
a special structure consisting of a long silica filament static plate and a cylindrical-surface …

Although the so-called magnetic geometrical factor, Bl, of a Kibble balance does not appear
in the Kibble equations, it offers the precision link between electrical and mechanical …

A six-axis heterodyne interferometer system has been designed for the joule balance to
measure the relative displacement between the suspended coil and the exciting coil. The …

The Planck constant h is one of the most significant constants in quantum physics. Recently,
the precision measurement of the value of h has been a hot issue due to its important role for …