Tdk Corporation

Tokyo Medical and Dental University

Kanazawa Institute of Technology

Tomohiko Shibuya

Atsushi Tsumita

Atsushi Ajioka

Shigenori Kawabata

Sadaharu Yoneda

Shuichi Okawa

Takato Fukui

Yu Hotta

Yoshiaki Adachi

Provided is a biological signal measurement device capable of suppressing an influence of noise derived from a body motion of a test subject on a biological signal measurement result. The biological signal measurement device includes a placement portion on which a test subject is placed, one or more measurement sensors configured to measure a biological signal regarding the test subject, and a sensor holder configured to hold the measurement sensors. The placement portion has a recess. At least a part of the measurement sensor is arranged inside of the recess of the placement portion. The sensor holder and the measurement sensors are arranged to be physically separated from the placement portion without coming into contact with the placement portion.

Biological signal measurement device

A magnetic sensor array includes a plurality of magnetic sensors. The magnetic sensor includes a sensor housing body housing the sensor chip and first and second connection parts formed on the sensor housing body. The first connection part formed on one of adjacent magnetic sensors and the second connection part formed on the other one thereof are axially supported on each other to achieve mutual connection between the plurality of magnetic sensors. Thus, it is possible to vary the relative angle between two adjacent magnetic sensors with the first and second connection parts as an axis. This allows the plurality of magnetic sensors to be pressed perpendicularly against even a curved surface of an object to be measured, and the pressed state can be easily maintained.

Magnetic sensor array

Disclosed herein is a position detection marker that includes a magnetic field source that generates magnetism, an MRI marker that can be detected by a magnetic resonance imaging method, and a holding part that fixes a relative positional relation between the magnetic field source and the MRI marker.

Position detection marker

A magnetic field calibration device is used to calibrate a magnetism measurement device having a plurality of magnetic sensors and includes a first holder having a first holding surface, a second holder having a second holding surface having a fixed relative positional relation with the first holding surface, and magnetism generating parts fixed to the first holding surface and the second holding surface. Thus, calibration can be completed with a single operation by assigning the first and second holding surfaces of the magnetic field calibration device respectively to the first and second measurement surfaces of the magnetism measurement device. In addition, since the relative positional relation between the first and second holding surfaces is fixed, measurement results obtained from the individual measurement surfaces match each other.

Magnetic field calibration device and method of calibrating magnetism measurement device using the same

An objective of the present invention is to provide a biomagnetism measurement device capable of three-dimensionally acquiring magnetism information of a living body with ease. This biomagnetism measurement device () is for measuring biomagnetism using a plurality of magnetic sensors () at the same time. The plurality of magnetic sensors () is retained by a retaining part () (a first retaining portion [] and a second retaining portion []) so as to have different measurement directions. Furthermore, the retaining part () (the first retaining portion [] and the second retaining portion []) has arranged thereon the plurality of magnetic sensors () so as to enable biomagnetism to be measured at a plurality of sites at the same time. The magnetic sensor () comprises a means for detecting the biomagnetism in a temperature environment commensurate with normal temperature.

Biomagnetism measurement device

The objective of the present invention is to provide a biomagnetism measuring device with which it is possible for a magnetic sensor to be disposed in an optimal position in accordance with an object being measured. A biomagnetism measuring device () according to the present invention is provided with: a plurality of magnetic sensors () which detect biomagnetism; and a holding portion () in which are formed frames () which detachably hold the plurality of magnetic sensors () in such a way as to face a living body. Further, the biomagnetism measuring device () according to the present invention is provided with: a plurality of magnetic sensors () which detect biomagnetism; and a holding portion () in which are formed rails () which movably hold the plurality of magnetic sensors () in such a way as to face a living body.

Biomagnetism measuring device

The present invention provides a biometric information measuring device with which a diagnostic imaging result and a biomagnetism measurement result can be superimposed simply and with satisfactory accuracy, and which is easy to handle. This biometric information measuring device () is provided with: a biomagnetism detecting unit () capable of detecting biomagnetism of a subject (S); and a radiation detecting unit () capable of acquiring an image corresponding to irradiated radiation, as digital image data, by means of the supply of a power source. The radiation detecting unit () is disposed between a measuring region of the subject (S) and the biomagnetism detecting unit (). Further, it is preferable to provide a control unit () capable of performing control such that the power source is not supplied to the radiation detecting unit () while the biomagnetism detecting unit () is detecting biomagnetism.

Biometric information measuring device

A magnetically shielded room reducing pressure felt by a person inside includes an upper shielding body, a side periphery shielding body, and a lower shielding body, all of which define a magnetically shielded inner space. A magnifying lens is located in the upper shielding body. The magnifying lens can magnify and project an incident image from outside to a range of one inner side surface of the magnetically shielded room. so that the range should be 50% or more of the area of the one inner side surface. The range includes most of the area above a line of sight of a person in the magnetically shielded room. The magnifying lens is provided at a position closer to the one inner side surface as a projection target of the lens than the other inner side surface as a non-projection target facing the one inner side surface as the projection target.

Magnetically shielded room

The objective of the present invention is to provide a biomagnetism measuring device capable of accurately detecting biomagnetism regardless of the object to be measured. This biomagnetism measuring device () is provided with: a plurality of magnetic sensors () which detect biomagnetism of a living body (); a retaining portion () including retaining holes () which retain the plurality of magnetic sensors () with freedom to move individually; and a movement mechanism which moves the magnetic sensors () individually in a contacting/separating direction causing the magnetic sensors () to come into contact with or separate from the living body (). As movement mechanisms there may be mentioned, for example, a pneumatic/hydraulic mechanism (), a resilient body mechanism (), a screw mechanism () and a gear mechanism ().

A magnetically shielded room, that is capable of suppressing positional deviation of a measuring tool in an internal space, has an upper shielding body, a side periphery shielding body, and a lower shielding body, which form a magnetically shielded internal space of the magnetically shielded room. A pedestal has a higher rigidity than the lower shielding body, and is located on an under surface of the lower shielding body. First and second supporting members are located on and stand erect from the pedestal. The first and second supporting members penetrate the lower shielding body and extend into the internal space.

A magnetically shielded room includes an upper shielding body, a side peripheral shielding body and a lower shielding body, all of which define a magnetically shielded inner space. The magnetically shielded inner space is divided into first and second inner spaces by a partition member which is a magnetic shielding body. A door, which is a magnetic shielding body, is provided for commonly closing the first and second inner spaces.

A magnetic head has a magnetic head slider that includes a recording element that generates a recording signal magnetic field, a microwave magnetic field generating element that generates a microwave magnetic field, a terminal electrode, and a first transmission line that interconnects the terminal electrode and the microwave magnetic field generating element. A second transmission line is connected to the terminal electrode, the second transmission line being used to transmit a microwave signal from the outside of the magnetic head slider to the magnetic head slider. A capacitor connected to the first transmission line is provided between the terminal electrode and the microwave magnetic field generating element. Accordingly, in the magnetic head, a microwave signal is efficiently propagated.

Magnetic head, head gimbal assembly, and magnetic recording and reproducing apparatus

There is provided a high-frequency amplifier including a divider, a plurality of amplifiers for amplifying a high-frequency signal distributed by the divider and outputting the amplified high-frequency signal, a combiner for combining amplified high-frequency signals, a base substrate, a conductor pattern that is connected to a ground end of each of the amplifiers, and a ground electrode. Each of the conductor patterns has a first conductive portion. A slot is disposed between the two conductor patterns connected to the corresponding adjacent amplifiers. Between the adjacent amplifiers, two vias are formed so that the slot is sandwiched between the vias. One of the two conductor patterns is connected to the ground electrode via one of the two vias, and the other one of the conductor patterns is connected to the ground electrode via the other one of the two vias.

High-frequency amplifier

A high-frequency amplifier circuit includes a balanced-unbalanced converter converting a single-ended signal into differential signals. The output of a first amplifier amplifying the single-ended signal is connected to the signal terminal on the unbalanced side of the balanced-unbalanced converter. The input of a second amplifier amplifying one of the differential signals is connected to one signal terminal on the balanced side of the balanced-unbalanced converter. The input of a third amplifier amplifying another of the differential signals is connected to another signal terminal on the balanced side of the balanced-unbalanced converter. An impedance element is inserted between an element on the balanced side of the balanced-unbalanced converter and a ground.

High-frequency amplifier circuit, semiconductor device, and magnetic recording and reproducing device

Since a high-frequency signal that is output from a high-frequency oscillator circuit section is detected in a detector circuit and a bias of a negative voltage is supplied from a bias circuit section to the high-frequency amplifier circuit section with a detection voltage that is detected, a negative power supply circuit such as a DC/DC converter or a peripheral circuit is not required, and since a negative bias voltage can be supplied to a high-frequency amplifier circuit, downsizing can be achieved with a low cost.

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Tokyo, Japan

Tomohiko Shibuya