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1.发明申请公开(公告)号：US20190125197A1
公开(公告)日：2019-05-02
申请号：US15941471
申请日：2018-03-30
Applicant: Hitachi, Ltd.
Inventor： Nobuhiro FUKUDA , Masashi KIGUCHI , Akiko NAKAJIMA , Takashi NUMATA , Hironori WAKANA , Masuyoshi YAMADA
Abstract: A biological information detection apparatus includes: a camera; a frame image analysis unit that detects a region including pixels having a predetermined skin color, as a skin color region, from a frame image taken using the camera, and detects a signal corresponding to a light wavelength from an image signal of each pixel included in the skin color region, as skin color wavelength data; a skin color wavelength difference detection unit that calculates an average value of differences of the skin color wavelength data from predetermined reference wavelength data for the pixels included in the skin color region, and acquires the average value as average wavelength difference data; a pulse wave signal detection unit that detects a signal obtained by smoothing the average wavelength difference data detected in time series, as a pulse wave signal.
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公开(公告)号：US20180074081A1
公开(公告)日：2018-03-15
申请号：US15689129
申请日：2017-08-29
Applicant: Hitachi, Ltd.
Inventor： Hironori WAKANA , Masuyoshi YAMADA
CPC classification number: G01N33/98 , A61B5/082 , A61B5/1176 , A61B5/4845 , G06K9/00255 , G06K9/00288 , G06K9/00899 , H04N5/2252 , H04N5/232
Abstract: It is an object to prevent impersonation in breath measurement by using a portable device. After breath is introduced into a breath introduction inlet 11 of a breath introduction device 1, a first image group is acquired by continuously capturing images over a predetermined period, and after drinking determination based on the introduced breath from the breath introduction inlet 11, the portable device is provided with an imaging device 11 that acquires a second image by capturing an image again and outputs whether or not each image in the first image group and the second image are the images of the same person.
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公开(公告)号：US20240255480A1
公开(公告)日：2024-08-01
申请号：US18370079
申请日：2023-09-19
Applicant: Hitachi, Ltd.
Inventor： Masuyoshi YAMADA , Yasutaka SERIZAWA , Hisanori MATSUMOTO
IPC: G01N33/00
CPC classification number: G01N33/0008
Abstract: An easy-to-maintain measurement system including a first sensor that measures a target and outputs a predetermined physical quantity, a second sensor that measures the target and outputs the same type as the predetermined physical quantity, and a processor configured to (1) acquire a first value from the first sensor and a second value from the second sensor, (2) convert the first value to the value of the physical quantity by a first calibration data, (3) calculate second calibration data for the second sensor from the second value and the predetermined physical quantity obtained in step (2), (4) convert the second value to the physical quantity by the second calibration data, and (5) detect the state of the measurement target by an estimation model and the physical quantity obtained in step (4).
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公开(公告)号：US20200300797A1
公开(公告)日：2020-09-24
申请号：US16824531
申请日：2020-03-19
Applicant: HITACHI, LTD.
Inventor： Hironori WAKANA , Masuyoshi YAMADA
IPC: G01N27/12 , G01N33/497
Abstract: A moisture detection element includes: an insulating substrate of an insulating material; an application part which is formed on the insulating substrate and to which a voltage is applied; an output part which is formed on the insulating substrate and configured to output a voltage signal corresponding in response to a current flowing through an electric path via water molecules adhering to a surface of the insulating substrate under the voltage applied to the application part; and a conductive film which is electrically insulated from the application part and the output part and is provided on the insulating substrate. An insulating film of an insulating material is provided on the application part, the output part, and the conductive film.
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公开(公告)号：US20200064331A1
公开(公告)日：2020-02-27
申请号：US16535173
申请日：2019-08-08
Applicant: HITACHI, LTD.
Inventor： Masuyoshi YAMADA , Hironori WAKANA
IPC: G01N33/497
Abstract: An exhaled gas detector includes: a gas detection element configured to measure a specific gas; and an analysis unit configured to analyze a signal output from the gas detection element. The gas detection element measures the specific gas in an exhalation of non-drinking time and generates a first reference signal value. The analysis unit calculates a first threshold value on the basis of the first reference signal value. The gas detection element measures the specific gas in an inspection gas and generates a first measurement signal value. The analysis unit determines that the inspection gas is identified with an exhalation of a person by determining that the first measurement signal value has exceeded the first threshold value.
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Patent Agency Ranking
公开(公告)号：US20180299397A1
公开(公告)日：2018-10-18
申请号：US15949800
申请日：2018-04-10
Applicant: Hitachi, Ltd.
Inventor： Masuyoshi YAMADA , Hironori WAKANA
IPC: G01N27/22
Abstract: Disclosed is a humidity sensing element that includes an insulation section made of an insulating material, an application electrode to which a voltage is applied, and an output electrode which outputs a voltage signal corresponding to an electrical current flowing through an electrical path via water molecules adhering to a surface of the insulating material in response to the voltage applied to the application electrode. A distance between the application electrode and the output electrode is equal to or greater than a predetermined value, and/or a total sum of lengths of portions where the application electrode and the output electrode face each other is less than a predetermined value.
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公开(公告)号：US20220341863A1
公开(公告)日：2022-10-27
申请号：US17705532
申请日：2022-03-28
Applicant: Hitachi, Ltd.
Inventor： Hironori WAKANA , Masuyoshi YAMADA
IPC: G01N27/12
Abstract: An object of the invention is to provide a gas detection system that does not require customization of an odor sensor depending on an environment. The gas detection system includes a sensor array including a plurality of sensors having different characteristic sensitivities, a pre-processing unit configured to convert each of sensor output values acquired from the sensors constituting the sensor array into an output ratio as a ratio of the output value to a predetermined value, and an odor determination processing unit configured to determine, by comparing a normal range generated based on a result of executing cluster analysis on an output ratio acquired from each of the sensors constituting the sensor array in the past with the output ratio obtained by the pre-processing unit executing the conversion, whether the output ratio is within the normal range.
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公开(公告)号：US20220243948A1
公开(公告)日：2022-08-04
申请号：US17573326
申请日：2022-01-11
Applicant: Hitachi, Ltd.
Inventor： Masuyoshi YAMADA , Hironori WAKANA
Abstract: An odor detection device includes an odor sensor for measuring an ambient odor, a fan that exhausts air around the odor sensor, and a substrate for controlling the fan and the odor sensor. Electric power supplied to the odor sensor, the fan, and the substrate is supplied from outside of the odor detection device, the substrate includes a connection unit capable of transmitting and receiving data to and from an external device that is a device separate from the odor detection device, and the fan is installed downstream of an airflow generated by the fan itself with respect to the odor sensor.
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9.发明申请公开(公告)号：US20190162715A1
公开(公告)日：2019-05-30
申请号：US16192837
申请日：2018-11-16
Applicant: Hitachi, Ltd.
Inventor： Hironori WAKANA , Masuyoshi YAMADA
IPC: G01N33/497 , G01N27/22
Abstract: There is provided a moisture detection element including: an insulating portion composed of an insulating material; a voltage-applied electrode to which a voltage is applied; a detection electrode configured to output a voltage signal corresponding to a current flowing through an electric path including water molecules adhering to the surface of the insulating portion in accordance with the voltage applied to the voltage-applied electrode; and a conductive film that is conductive and electrically insulated from the voltage-applied electrode and the detection electrode, in which the voltage-applied electrode, the detection electrode, and the conductive film are disposed on the insulating portion. When dew condensation is detected, a DC voltage is applied to the voltage-applied electrode.
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公开(公告)号：US20180284048A1
公开(公告)日：2018-10-04
申请号：US15767509
申请日：2015-10-15
Applicant: Hitachi, Ltd.
Inventor： Hironori WAKANA , Masuyoshi YAMADA , Minoru SAKAIRI
IPC: G01N27/12 , G01N33/497
Abstract: In order to provide a moisture detection element, a gas detection device, and a breath inspection system that are compact and have high response performance, the moisture detection element includes an insulating section made of an insulating material, an application electrode to which an voltage is applied, and a detection electrode that detects a voltage signal corresponding to a current flowing through an electrical path via water molecules adsorbed on the insulating section by the voltage applied to the application electrode.
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