公开(公告)号：US11977048B2

公开(公告)日：2024-05-07

申请号：US17605263

申请日：2020-02-13

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Seiichiro Mizuno ,  Hiroo Yamamoto ,  Sho Morita ,  Toshiki Wakamori

IPC: G01N27/333 ,  G01N27/414

CPC classification number: G01N27/333 ,  G01N27/4141

Abstract: A smell sensor includes an ion sensor having a sensitive film, a substance adsorption film disposed on the sensitive film and configured to adsorb a smell substance to be detected, and an electrode configured to apply a reference voltage to the substance adsorption film. The substance adsorption film is in a state of releasing a proton in response to absorbing the smell substance.

公开(公告)号：US11921081B2

公开(公告)日：2024-03-05

申请号：US17255014

申请日：2019-05-27

Applicant: HAMAMATSU PHOTONICS K.K. ,  National University Corporation TOYOHASHI UNIVERSITY OF TECHNOLOGY

Inventor： Toshiki Wakamori ,  Shinichi Nakahigashi ,  Kazuaki Sawada

IPC: G01N27/414 ,  G01N33/00

CPC classification number: G01N27/4141 ,  G01N33/0031

Abstract: A smell sensor includes an ion sensor in which a sensing section provided with a sensitive film configured to change a potential in accordance with a state of a measurement target is formed on a semiconductor substrate; a substance adsorption film disposed on the sensitive film and configured to change the state with adsorption of a smell substance; and a reference electrode configured to apply a reference voltage to the substance adsorption film. The reference electrode is disposed to be separated from the sensitive film and not to overlap the sensing section when viewed in a thickness direction of the semiconductor substrate.

公开(公告)号：US12196703B2

公开(公告)日：2025-01-14

申请号：US17627259

申请日：2020-05-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Seiichiro Mizuno ,  Hiroo Yamamoto ,  Sho Morita ,  Toshiki Wakamori

IPC: G01N27/30 ,  G01N27/00 ,  G01N27/413 ,  G01N27/414

Abstract: An ion detection device includes an ion sensor having a sensitive film immersed in an aqueous solution and outputting an output signal in accordance with a potential change of the sensitive film, and an adjuster acquiring the output signal of the ion sensor and adjusting a drive signal for driving the ion sensor to reduce an offset from a predetermined reference value in the output signal.

公开(公告)号：US12055516B2

公开(公告)日：2024-08-06

申请号：US17627248

申请日：2020-05-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Seiichiro Mizuno ,  Hiroo Yamamoto ,  Sho Morita ,  Toshiki Wakamori

IPC: G01N27/414 ,  G01N33/00

CPC classification number: G01N27/4141 ,  G01N33/0031

Abstract: A smell detection device includes an ion sensor having a sensitive film and outputting an output signal in accordance with a potential change of the sensitive film, a substance adsorption film disposed on the sensitive film and changing its state by adsorbing a smell substance to be detected to cause the potential change of the sensitive film, and an adjuster acquiring the output signal of the ion sensor and adjusting a drive signal for driving the ion sensor to reduce an offset from a predetermined reference value in the output signal.