公开(公告)号：US20160274028A1

公开(公告)日：2016-09-22

申请号：US15034968

申请日：2014-10-21

Applicant: ILLINOIS TOOL WORKS INC.

Inventor： Marco SCLIP ,  Davide BORDIGNON

IPC: G01N21/53 ,  D06F39/00 ,  A47L15/42 ,  G01N21/41 ,  G01N21/59

CPC classification number: G01N21/532 ,  A47L15/4297 ,  D06F33/02 ,  D06F39/004 ,  D06F2202/02 ,  D06F2204/04 ,  D06F2204/08 ,  G01N21/41 ,  G01N21/534 ,  G01N21/59 ,  G01N21/5907 ,  G01N21/8507 ,  G01N2201/062 ,  G01N2201/0638

Abstract: A multisensor employs an optical system that is modified by the index of refraction of fluid passing between a light emitter and light detector to successfully distinguish between air and water (of any turbidity) and between water of different turbidity values. The optical system may employ lenses contacting the fluid to change their focal length and thus to focus and defocus light on the light detector depending on an index of refraction of the fluid.

Abstract translation: 多传感器采用通过光发射器和光检测器之间通过的流体的折射率来修正的光学系统，以成功地区分空气和水（任何浊度）和不同浊度值的水之间。 光学系统可以使用与流体接触的透镜来改变它们的焦距，并且因此根据流体的折射率将光聚焦和散焦在光检测器上。

公开(公告)号：US20240197142A1

公开(公告)日：2024-06-20

申请号：US18286328

申请日：2022-04-01

Applicant: ILLINOIS TOOL WORKS INC.

Inventor： Davide BORDIGNON ,  Rocco CORBISIERO ,  Massimo PERUZZO

IPC: A47L15/42 ,  G01N21/85

CPC classification number: A47L15/4297 ,  G01N21/8507 ,  G01N2021/8528

Abstract: The present disclosure relates to a sensor assembly (100) for sensing the turbidity of a cleaning medium in a cleaning appliance (190), comprising: a printed circuit board (122) having a substantially planar top surface and a substantially planar bottom surface; a light emitter (112) operably mounted to said printed circuit board (122), configured to emit an electromagnetic signal in a first direction substantially perpendicular to and away from said planar top surface; a light receiver (114) operably mounted to said printed circuit board (122) spaced apart from said light emitter (112) along said substantially planar top surface, configured to receive said electromagnetic signal from a second direction substantially perpendicular to and towards said planar top surface of said printed circuit board (122); and a light guide (150), operably coupleable between said light emitter (112) and said light receiver (114), defining a signal path (116) extending from said light emitter (112) to said light receiver (114) utilising: a first light guide portion (152), configured to reflectingly redirect said electromagnetic signal in a third direction non-parallel to said first direction and in a fourth direction non-parallel to said third direction at a first light guide exit point (160), and a second light guide portion (162), spaced apart from said first light guide portion (152) in a direction parallel to said planar top surface by a predetermined gap, configured to receive said electromagnetic signal exiting said first light guide exit point (160) and reflectingly redirect said electromagnetic signal in a fifth direction non-parallel to said fourth direction and in a sixth direction coaxial with said second direction.