Olympus Corporation

Tohoku University

Japan Science and Technology Agency

Kyodo Kumiai Joint-labo Sendai

Shin Yabukami

Kenichi Arai

Akio Uchiyama

Kazushi Ishiyama

Isao Aoki

Kazuhiko Okita

Masahiro Yamaguchi

Hiroyasu Kanetaka

Mitsuharu Watanabe

Noboru Saito

Kiichi Itagaki

Atsushi Itagaki

Koichi Fuda

Takashi Tamogami

Yukio Sakurada

Hiroshi Takahashi

The measurement device for measuring permeability and permittivity of an object, includes a probe in which a signal transmission line is formed and on which the object is capable of being disposed close to or in contact with the signal transmission line; a magnetic-field application unit configured to apply a magnetic-field to the object; a signal measurement instrument configured to measure a signal transmitted through the signal transmission line in each state in which the object is disposed and not disposed on the signal transmission line and in each state in which the magnetic-field is applied and not applied; a permeability processing unit configured to obtain the permeability of the object; and a permittivity processing unit configured to obtain the permittivity of the object, the both units obtaining based on the signal transmitted through the signal transmission line in each state in which the magnetic-field is applied and not applied.

Measurement device and measurement method for measuring permeability and permittivity

A probe configured to measure the magnetic permeability of a magnetic body includes a first signal conductor and a second signal conductor that form a pair of signal conductors, the first and second signal conductors being a signal transmission path, and tip ends of the first and second signal conductors being disposed away from a surface of the magnetic body by a predetermined gap length and at a predetermined interval from each other; a linear conductor that electrically connects the tip ends of the first and second signal conductors and that extends between the tip ends; and a first ground conductor and a second ground conductor that form a pair of ground conductors disposed in the vicinity of the pair of signal conductors, tip ends of the first and second ground conductor being in contact with the surface of the magnetic body.

Permeability measuring probe and permeability measuring device

A detecting system of the position and the posture of a capsule medical device includes a main body of the capsule medical device that is inserted in a living body, a coil in a capsule that is arranged to the main body of the capsule medical device and forms a resonant circuit, a magnetic field generating device that is arranged around the living body and generates the Alternating magnetic field for generating an induced magnetic field in the coil in the capsule, and a plurality of magnetic field detecting devices that detect the strength of the induced magnetic field generated by the coil in the capsule by the magnetic field generated by the magnetic field generating device.

Detecting system of position and posture of capsule medical device

An instrument () for measuring three-dimensional motion in a living body comprises a plurality of magnetism generators () fixed to one of at least two objects () moving relatively in the living body, a plurality of magnetic field sensors () fixed to the other object in order to perform noncontact detection of the magnetic field of each magnetism generator (), and a signal processing means () for calculating relative position and direction between each magnetism generator () and each magnetic field sensor () according to a magnetic field detected by each magnetic field sensor (). The number of magnetism generators () and magnetic field sensors () is at least five, respectively.

Instrument and method for measuring three-dimensional motion

A first substrate having a first electromagnetic noise sensor on its surface perpendicularly intersects with a second substrate having a second electromagnetic noise sensor on its surface, making up an integral structure. A first induced voltage value output from the first electromagnetic sensor at a position thereof directly before driving by a driving means is recorded, and a second induced voltage value output from the second electromagnetic noise sensor at a position thereof at a time of movement of the integral structure for only a predetermined distance by a driving means is recorded. Further, the first and second electromagnetic noise sensors are parallel connected at the position of movement, and a third induced voltage value output from a parallel connected electromagnetic noise sensor is also recorded. Based on the recorded first and second voltage values, an electromagnetic noise level in a vicinity of the integral substrate is determined. The first and second induced voltage values are compared, and based on comparison of the first and second induced voltage values, and whether a larger voltage value from among the first and second voltage values is larger than the third voltage value, a direction of an electromagnetic noise generating source in the vicinity of the integral substrate is computationally determined. The determined electromagnetic noise level and direction of the electromagnetic noise generating source are displayed at a position on a display device corresponding with a position of the first electromagnetic noise sensor.

Electromagnetic noise measurement apparatus

Growing community of inventors

Sendai, Japan

Shin Yabukami