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公开(公告)号：US20240219335A1
公开(公告)日：2024-07-04
申请号：US18550085
申请日：2022-03-16
Inventor： Atsuo NAKAO
CPC classification number: G01N27/125 , G01N33/0027
Abstract: A sensitive membrane includes: a membrane body containing a sensitive material; and a carbon black contained in the membrane body. The membrane body is expandable when adsorbing an analyte. The carbon black has a dibutyl phthalate absorption number less than 100 cm3/100 g. This reduces the adsorption of water into gaps between carbon black particles and thereby reduces variations in the resistance value and sensitivity of the sensitive membrane with time.
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公开(公告)号：US20240183814A1
公开(公告)日：2024-06-06
申请号：US18551325
申请日：2022-03-16
Inventor： Chiaki SHIDO , Atsuo NAKAO
CPC classification number: G01N27/125 , G01N33/0027
Abstract: A gas sensor includes a sensitive portion and a plurality of electrodes arranged via the sensitive portion. The sensitive portion includes an ionic liquid and is configured to have electrical resistance that changes when the sensitive portion adsorbs a gas molecule. The ionic liquid preferably includes a hydrophobic anion. The hydrophobic anion preferably includes an organic fluorine compound. The organic fluorine compound preferably has a trifluoromethyl group.
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公开(公告)号：US20240402143A1
公开(公告)日：2024-12-05
申请号：US18687214
申请日：2022-09-05
Inventor： Atsuo NAKAO
Abstract: A gas analyzing method includes obtaining, dividing, selecting, extracting, and analyzing. In the obtaining, signal is obtained from a sensor exposed to sample gas under a condition where molecules contained in the sample gas is more readily adsorbed to the sensor in a second period than in a first period and a third period in a measurement period for the exposure. In the dividing, each of the second and third periods is divided into divided sections. In the selecting, an extraction section is selected from a part of the divided sections. In the extracting, feature of the signal in the extraction section is extracted. In the analyzing, analysis on the molecules contained in the sample gas is performed based on the extracted feature among features of the signal in the measurement period, and a result of the analysis is outputted.
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公开(公告)号：US20240183813A1
公开(公告)日：2024-06-06
申请号：US18550078
申请日：2022-03-16
Inventor： Atsuo NAKAO
CPC classification number: G01N27/125 , G01N33/0027
Abstract: A sensitive membrane includes: a membrane body containing a sensitive material; and a carbon black contained in the membrane body. The carbon black has a volatile content equal to or greater than 2.5 wt %. This sensitive membrane may detect even a very small amount of odor molecules.
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Patent Agency Ranking
5.发明申请公开(公告)号：US20250155419A1
公开(公告)日：2025-05-15
申请号：US18834408
申请日：2023-02-03
Inventor： Yosuke HANAI , Atsuo NAKAO , Masaya NAKATANI
Abstract: A volatile component released from a food product is trapped. Detection data on the volatile component is acquired by using a detector. When the food product is spoiled, at least one of a type of the food product or a degree of spoilage of the food product is determined based on the detection data.
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公开(公告)号：US20240151673A1
公开(公告)日：2024-05-09
申请号：US18282451
申请日：2022-03-16
Inventor： Atsuo NAKAO , Atsushi SHUNORI
IPC: G01N27/12
CPC classification number: G01N27/12
Abstract: A sensitive membrane includes: a membrane body containing a sensitive material; and a plurality of conductive particles included in the membrane body. The membrane body is expandable when adsorbing an analyte. An M1/M2 ratio of a mass M1 of the sensitive material to a mass M2 of the plurality of conductive particles is equal to or less than 0.4.
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公开(公告)号：US20240036018A1
公开(公告)日：2024-02-01
申请号：US18253342
申请日：2021-11-26
Inventor： Toshiki NIINOMI , Atsuo NAKAO , Yosuke HANAI , Takahiro NOGAMI
CPC classification number: G01N33/0016 , G01N1/2273 , G01N33/0047 , G01N27/14
Abstract: An air quality determination method including a temperature control step, an acquisition step, a determination step, and an output step. The temperature control step includes controlling a temperature of a sensitive unit exposed to a sample gas to cause the temperature of the sensitive unit to vary in a temperature variation pattern including at least one temperature rising period in which the temperature of the sensitive unit rises and at least one temperature falling period in which the temperature of the sensitive unit falls. The acquisition step includes acquiring an electrical characteristic value of the sensitive unit exposed to the sample gas. The determination step includes determining, using a learned model to determine an air quality condition of the sample gas, the air quality condition of the sample gas based on a variation in the electrical characteristic value. The output step includes outputting a decision made in the determination step.
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公开(公告)号：US20230349850A1
公开(公告)日：2023-11-02
申请号：US18017994
申请日：2021-08-05
Inventor： Chiaki SHIDO , Yosuke HANAI , Atsuo NAKAO
CPC classification number: G01N27/125 , G01N33/0027
Abstract: A gas sensor includes: a sensing unit; and a first electrode and a second electrode that are a pair of electrodes each electrically connected to the sensing unit. The sensing unit has a conductive material and a polymer having a siloxane bond as a main chain structure. The polymer has a cyano group in a side chain.
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公开(公告)号：US20230063005A1
公开(公告)日：2023-03-02
申请号：US17801174
申请日：2021-02-26
Inventor： Atsuo NAKAO
Abstract: A gas detection system includes a gas sensor, and a filter unit. The gas sensor is configured to detect detection target molecules. The filter unit is disposed at a reference gas supply passage. The reference gas supply passage connects a reference gas inlet port from which a reference gas is introduced, and a sensor chamber in which the gas sensor is housed. The filter unit includes at least a first filter configured to reduce the detection target molecules in the reference gas, and a second filter configured to reduce moisture in the reference gas. Each of the first filter and the second filter has a separation membrane including hollow fibers.
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