公开(公告)号：US11933752B2

公开(公告)日：2024-03-19

申请号：US16520219

申请日：2019-07-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoru Fujii ,  Zhiqiang Wei ,  Kazunari Homma ,  Shinichi Yoneda ,  Yasuhisa Naito ,  Hisashi Shima ,  Hiroyuki Akinaga

IPC: G01N27/12 ,  G01N27/414 ,  G01N33/00 ,  H01M8/04

CPC classification number: G01N27/125 ,  G01N27/4141 ,  G01N33/005 ,  H01M8/04

Abstract: A gas sensor includes: a gas-sensitive body layer disposed above a substrate and including a metal oxide layer; a first electrode on the gas-sensitive body layer; and a second electrode on the gas-sensitive body layer, being apart from the first electrode by a gap. The gas-sensitive body layer has a resistance change characteristic that reversibly transitions to a high-resistance state and a low-resistance state on basis of a voltage applied across the first electrode and the second electrode. At least a part of the gas-sensitive body layer is exposed to the gap. The gas-sensitive body layer has a resistance that decreases when gas containing a hydrogen atom is in contact with the second electrode.

公开(公告)号：US11027604B2

公开(公告)日：2021-06-08

申请号：US16468558

申请日：2017-12-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ken Kawai ,  Shinichi Yoneda

IPC: G01N33/00 ,  B60K1/04 ,  B60L3/00 ,  G01M3/16 ,  G01N27/12 ,  H01M8/04298 ,  B60L50/71

Abstract: A hydrogen detection apparatus includes a hydrogen sensor, a sensor control circuit configured to sense a resistance value of the hydrogen sensor, and a microcomputer configured to set an off time that differs depending on an operating environment and intermittently drive the sensor control circuit. The hydrogen sensor includes a first electrode; a metal-oxide layer on the first electrode, and in which a resistance value is configured to change in response to contacting hydrogen atoms; a second electrode on the metal-oxide layer; and an insulating film that covers at least a portion of lateral surfaces of the first electrode, the metal-oxide layer, and the second electrode. A portion of at least one of: (i) a first interface between the first electrode and the metal-oxide layer; and (ii) a second interface between the second electrode and the metal-oxide layer is uncovered by the insulating film and exposed to a detection space.

公开(公告)号：US11788999B2

公开(公告)日：2023-10-17

申请号：US16712540

申请日：2019-12-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Zhiqiang Wei ,  Shinichi Yoneda ,  Ryoichi Suzuki ,  Shunsaku Muraoka

IPC: G01M3/28 ,  G01N33/00 ,  H04L67/12 ,  H04W84/18

CPC classification number: G01N33/005 ,  G01M3/2892 ,  H04L67/12 ,  H04W84/18

Abstract: A gas monitoring system includes at least one sensor device that detects gas and outputs a detection result; and a gateway that receives the detection result. The at least one sensor device includes a sensor module having a gas sensor that detects gas; an analog-to-digital (A/D) converter that processes the detection result outputted from the gas sensor; a communication module that communicates with the sensor module and transmits information processed by the A/D converter exteriorly of the at least one sensor device; a power source that is an electric power source of the sensor module; and a power source that is an electric power source of the communication module.

公开(公告)号：US11536677B2

公开(公告)日：2022-12-27

申请号：US16471864

申请日：2017-12-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ken Kawai ,  Koji Katayama ,  Shinichi Yoneda

IPC: G01N27/12 ,  B60L50/71 ,  G01N33/00 ,  H01L45/00 ,  H01M8/04082 ,  H01M8/0438 ,  B60K1/04 ,  B60K15/03 ,  G07C5/00

Abstract: A gas detection device includes a gas sensor and a drive circuit. The drive circuit includes a measurement circuit, a power supply circuit, and a control circuit. The gas sensor includes a first electrode, a second electrode, a metal-oxide layer disposed between the first electrode and the second electrode, and an insulating film that covers the first electrode, the second electrode, and the metal-oxide layer, and has an opening that exposes part of a main surface of the second electrode. A resistance value of the metal-oxide layer decreases when gas containing hydrogen atoms contact the second electrode. When the resistance value of the metal-oxide layer falls outside a predetermined range, the drive circuit applies a predetermined voltage between the first electrode and the second electrode to restore the resistance value of the metal-oxide layer back into the predetermined range.