公开(公告)号：US11885726B2

公开(公告)日：2024-01-30

申请号：US17269889

申请日：2018-12-13

Applicant: ams AG

Inventor： Harald Etschmaier ,  Bassam Hallal ,  Elisa Parola ,  Georg Roehrer

IPC: G01N15/14 ,  G01N15/02

CPC classification number: G01N15/0211 ,  G01N2015/0238

Abstract: A particulate matter sensor module includes a light source and a light detector mounted on a substrate. A housing is attached to the substrate and includes first and second sections attached to one another in a stack over the substrate such that the first section is disposed between the substrate and the second section. The first and second sections, in combination, define a light reflection chamber, a fluid flow conduit, a particle-light interaction chamber, and a light trap chamber. The first section has a first aperture through which light emitted by the light source can pass to a reflective surface within the light reflection chamber. The reflective surface is configured to reflect the light toward the particle-light interaction chamber where the light can interact with particles in a fluid flowing in the fluid flow conduit. The first section has a second aperture through which light scattered in the particle-light interaction chamber as a result of interaction with one or more of the particles can pass for sensing by the detector. The fluid flow conduit includes a fluid inlet portion having an end coupled directly to the particle-light interaction chamber.

公开(公告)号：US20210318220A1

公开(公告)日：2021-10-14

申请号：US17269889

申请日：2018-12-13

Applicant: ams AG

Inventor： Harald Etschmaier ,  Bassam Hallal ,  Elisa Parola ,  Georg Roehrer

IPC: G01N15/02

Abstract: A particulate matter sensor module includes a light source and a light detector mounted on a substrate. A housing is attached to the substrate and includes first and second sections attached to one another in a stack over the substrate such that the first section is disposed between the substrate and the second section. The first and second sections, in combination, define a light reflection chamber, a fluid flow conduit, a particle-light interaction chamber, and a light trap chamber. The first section has a first aperture through which light emitted by the light source can pass to a reflective surface within the light reflection chamber. The reflective surface is configured to reflect the light toward the particle-light interaction chamber where the light can interact with particles in a fluid flowing in the fluid flow conduit. The first section has a second aperture through which light scattered in the particle-light interaction chamber as a result of interaction with one or more of the particles can pass for sensing by the detector. The fluid flow conduit includes a fluid inlet portion having an end coupled directly to the particle-light interaction chamber.