公开(公告)号：US20210090460A1

公开(公告)日：2021-03-25

申请号：US16935778

申请日：2020-07-22

Applicant: Hiroshima University ,  Hitachi, Ltd.

Inventor： Tsukasa FUNANE ,  Hirokazu ATSUMORI ,  Akihiko KANDORI ,  Akiko OBATA ,  Ayako NISHIMURA ,  Yuto KOMATSU ,  Takashi NUMATA ,  Seiji HAMA ,  Toshio TSUJI

IPC: G09B19/00 ,  A61B5/16 ,  A61B5/11 ,  A61B5/00

Abstract: An information processing system visualizes brain states to optimize rehabilitation programs for rapid feedback of their effects to a patient and healthcare staff, to thereby promote the efficiency of rehabilitation. An embodiment of the system includes: a storage section that stores test-result brain-state relationship information associating results of activities of multiple examinees subjected to predetermined tests with brain states of the examinees; an input section that accepts a first test result as the result of the activity of a first examinee subjected to the predetermined tests; a control section that estimates the brain state from the first test result on the basis of the test-result brain-state relationship information; and an output section that outputs the estimated brain state.

公开(公告)号：US20160313417A1

公开(公告)日：2016-10-27

申请号：US15100801

申请日：2013-12-03

Applicant: HITACHI, LTD.

Inventor： Ryuzo KAWABATA ,  Akihiko KANDORI

IPC: G01R33/26 ,  H01S3/13 ,  H01S5/14 ,  G02B27/10 ,  H01S5/0687

CPC classification number: G01R33/26 ,  G02B27/106 ,  H01S3/1303 ,  H01S5/005 ,  H01S5/0085 ,  H01S5/0687 ,  H01S5/14 ,  H01S2301/02

Abstract: The present invention addresses the problem of stabilizing signals in magnetic field measurement using optical pumping. In order to solve the problem, disclosed is a light source apparatus (10) that is characterized in having: a light intensity fluctuation detection circuit (130) that detects intensity fluctuation of light outputted from a laser output unit (11); and an acousto-optic modulator (121) that corrects light intensity on the basis of light intensity fluctuation detected by means of the light intensity fluctuation detection circuit (130) such that the light intensity is constant Furthermore, a magnetic field measuring apparatus of the present invention is characterized in having: one sensor unit that passes therethrough light outputted from a light source unit: and a signal control processor that eliminates the light intensity fluctuation on the basis of two lights passed through the sensor unit.

Abstract translation: 本发明解决了使用光泵浦在磁场测量中稳定信号的问题。 为了解决这个问题，公开了一种光源装置（10），其特征在于具有：检测从激光输出部（11）输出的光的强度波动的光强度波动检测电路（130）。 以及声光调制器（121），其基于通过光强度波动检测电路（130）检测的光强度波动来校正光强度，使得光强度恒定。此外，本发明的磁场测量装置 本发明的特征在于具有：通过从光源单元输出的光的一个传感器单元;以及信号控制处理器，其基于通过传感器单元的两个光消除光强度波动。

公开(公告)号：US20160202330A1

公开(公告)日：2016-07-14

申请号：US14911695

申请日：2013-09-09

Applicant: HITACHI, LTD.

Inventor： Hiroyuki YAMAMOTO ,  Akihiko KANDORI ,  Katsuya MIURA

IPC: G01R33/09 ,  H01L43/08

CPC classification number: H01F10/3286 ,  G01R33/093 ,  G01R33/098 ,  H01L43/08

Abstract: Provided is a magnetic sensor device having a structure in which a plurality of MTJ structures, each using a ferromagnetic layer having an in-plane axis of easy magnetization and a ferromagnetic layer having a perpendicular axis of easy magnetization, are laminated. By a single device, magnetic fields in two or more directions can be sensed, or a plurality of magnetic field ranges including a small magnetic field and a relatively large magnetic field can be sensed.

Abstract translation: 提供了一种磁传感器装置，其结构是将多个MTJ结构层叠在一起，每个MTJ结构使用具有容易磁化的面内轴的铁磁层和具有易磁化的垂直轴的铁磁层。 通过单个装置，可以检测两个或更多个方向的磁场，或者可以感测到包括小磁场和相对大的磁场的多个磁场范围。

公开(公告)号：US20130265042A1

公开(公告)日：2013-10-10

申请号：US13827062

申请日：2013-03-14

Applicant: HITACHI, LTD.

Inventor： Ryuzo KAWABATA ,  Akihiko KANDORI ,  Taro OSABE ,  Seiichi SUZUKI ,  Yudai KAMADA

IPC: G01R33/26

CPC classification number: G01R33/26

Abstract: Stable magnetic field measurement is enabled without collapse of polarization or fluctuation of intensity of a laser beam incident on a glass cell of an optical pumping magnetic sensor. Excitation light generated with a light source, having optimized light intensity and polarized wave, through frequency stabilization, intensity control and polarized-wave control, is introduced via a polarized wave holding optical fiber to a magnetic sensor provided in a magnetic shield, and magnetic field measurement is performed by optical pumping using magneto-optical properties of spin-polarized alkali metal. The magnetic sensor has a structure where a lens, a polarization optical device, the glass cell and a photodetector, are integrally accommodated in a non-magnetic case.

Abstract translation: 能够进行稳定的磁场测量，而不会使入射在光泵送磁传感器的玻璃电池上的激光束的偏振或强度波动。 通过频率稳定，强度控制和极化波控制，通过偏振波保持光纤将具有优化的光强度和极化波的光源产生的激发光引入设置在磁屏蔽中的磁传感器，并且磁场 通过使用自旋极化碱金属的磁光性质的光泵浦进行测量。 磁传感器具有将透镜，偏振光学装置，玻璃电池和光电检测器一体地容纳在非磁性壳体中的结构。