公开(公告)号：US10268874B2

公开(公告)日：2019-04-23

申请号：US15523057

申请日：2015-10-20

Applicant: NEC Corporation

Inventor： Yuji Ohno ,  Masahiro Kubo ,  Katsumi Abe ,  Takeshi Akagawa ,  Kimiyasu Takoh ,  Ersin Altintas ,  Tetsuri Ariyama

IPC: G06K9/00 ,  A61B5/024 ,  A61B5/1172 ,  G01J3/10 ,  G01J3/28 ,  G06F17/30 ,  G06F21/32

Abstract: A biometric authentication apparatus 10 according to the present invention can be installed in facilities such as airports in order to improve the reliability of biometric authentication to ensure a high level of security. The biometric authentication apparatus 10 includes a illumination unit 11 which irradiates a human finger with light; an image acquisition unit 13 which acquires a plurality of images indicating changes in luminance by receiving light scattered at the human finger that is a part of the light with which the human finger is irradiated by the illumination unit 11 and converting the received light to luminance information according to the intensity of the light; an image-to-biometric-information conversion unit 14 which converts the plurality of images acquired by the image acquisition unit 13 to biometric information indicating a pulse wave in the human finger; and a biometric authentication unit 16 which performs biometric authentication when a pulse wave signal which is the biometric information resulting from the conversion by the image-to-biometric-information conversion unit 14 is greater than a predetermined threshold.

公开(公告)号：US09848782B2

公开(公告)日：2017-12-26

申请号：US15118267

申请日：2015-02-13

Applicant: NEC CORPORATION

Inventor： Yuji Ohno ,  Masahiro Kubo ,  Kimiyasu Takoh ,  Katsumi Abe ,  Ersin Altintas ,  Hiroshi Imai ,  Osamu Tochikubo

IPC: A61B6/00 ,  A61B5/022 ,  A61B5/00 ,  A61B5/021 ,  A61B5/024

CPC classification number: A61B5/02225 ,  A61B5/02116 ,  A61B5/02416 ,  A61B5/7207 ,  A61B5/7278 ,  A61B5/742 ,  A61B5/7475

Abstract: Provided are a blood pressure estimation device, and the like, the device being capable of accurately estimating blood pressure. The blood pressure estimation device includes a blood pressure estimation unit which estimates a blood pressure on the basis of a pressure in a specific time period and differences between a plurality of pulse wave signals measured in the specific time period due to the pressure.

公开(公告)号：US11660025B2

公开(公告)日：2023-05-30

申请号：US16629080

申请日：2017-07-11

Applicant: NEC Corporation

Inventor： Tetsuri Ariyama ,  Terumi Umematsu ,  Yuji Ohno ,  Katsumi Abe ,  Mineto Satoh ,  Takeshi Akagawa ,  Masahiro Kubo ,  Tan Azuma ,  Kenichiro Fujiyama ,  Soichiro Araki

IPC: A61B5/117 ,  A61B5/02 ,  G06F21/32 ,  A61B5/0295

CPC classification number: A61B5/117 ,  G06F21/32 ,  A61B5/02035 ,  A61B5/0295

Abstract: An identification device including a generation unit and an information identification unit. The generation unit generates factor information relating to pulse-wave information with respect to an identification target in accordance with biological model information representing a relevance between pulse-wave information representing a pulse wave and the factor information representing a factor of pulse wave. The information identification unit selects certain list information satisfying a predetermined determination criterion of the factor information generated by the generation unit out of list information associating the factor information generated based on the pulse-wave information representing a pulse wave of a biological subject to be an identification target with identification information for identifying the biological subject, and identifies the identification information in the selected certain list information.

公开(公告)号：US11231272B2

公开(公告)日：2022-01-25

申请号：US16764526

申请日：2018-10-30

Applicant: NEC CORPORATION ,  NATIONAL UNIVERSITY CORPORATION KAGAWA UNIVERSITY

Inventor： Takeshi Akagawa ,  Masahiro Kubo ,  Katsumi Abe ,  Ersin Altintas ,  Yuji Ohno ,  Tetsuri Ariyama ,  Ichiro Ishimaru

IPC: G01B9/02 ,  G01J3/45

Abstract: Optical measuring apparatus includes: a light source irradiating an object to be measured; a splitter splitting transmitted light or reflected light from the object to be measured; a phase changer changing a phase of a first light which is one of the lights split; a phase fixer maintaining a phase of a second light which is the other light split; a multiplexer multiplexing lights output from the phase changer and the phase fixer; a detector detecting the light (interference image) output from the multiplexer; and a controller that extracts a reference point from the interference image, when a displacement of the reference point is detected, corrects a luminance value for each pixel of the interference images in accordance with a displacement of the object to be measured indicated by a displacement of the reference point, constructs an interferogram based on the luminance value for each pixel of the interference images after the correction.

公开(公告)号：US20150160071A1

公开(公告)日：2015-06-11

申请号：US14408574

申请日：2012-12-11

Applicant: NEC Corporation

Inventor： Hideki Kadosawa ,  Tetsuya Yoshinari ,  Shigeki Shinoda ,  Katsumi Abe ,  Yasuhiro Sasaki

IPC: G01H11/06

CPC classification number: G01H11/06 ,  G01H11/08 ,  G08B13/1654

Abstract: Provided are a vibration detector and a vibration detecting method, which are power saving, can detect vibration even if the vibration is very weak, and can perform both start-up of the apparatus and collection of data of vibration information by the use of only one sensor. The apparatus includes a vibration detector, a semiconductor switch, a controller and a power supply. The semiconductor switch and the controller are connected to the power supply. The vibration detector detects vibration and consequently generates a vibration voltage. The semiconductor switch includes a voltage divider for generating a bias voltage inside. The semiconductor switch detects a voltage produced by superposing the bias voltage onto the vibration voltage outputted from the vibration detector, and conducts current when the detected voltage is equal to or larger than a certain value. The controller wakes up with the current conducted by the semiconductor switch as a trigger signal.

Abstract translation: 提供了一种节电的振动检测器和振动检测方法，即使振动非常弱也能够检测振动，并且可以通过仅使用一个来执行设备的启动和收集振动信息的数据 传感器。 该装置包括振动检测器，半导体开关，控制器和电源。 半导体开关和控制器连接到电源。 振动检测器检测振动，从而产生振动电压。 半导体开关包括用于在其内部产生偏置电压的分压器。 半导体开关检测通过将偏置电压叠加到从振动检测器输出的振动电压而产生的电压，并且当检测到的电压等于或大于一定值时，传导电流。 控制器用半导体开关传导的电流作为触发信号唤醒。