Sensor for determining at least one parameter of a fluid medium streaming through a measuring channel

Patent metadata

Field	Value
Publication number	US-11067420-B2
Application number	US-201615566451-A
Country	US
Kind code	B2
Filing date	Feb 29, 2016
Priority date	Apr 15, 2015
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A sensor for determining at least one parameter of a fluid medium, in particular an induction air-mass flow of an internal combustion engine, flowing through a measuring channel. The sensor has a sensor housing, in particular a plug-in sensor, which is introduced or may be introduced into a flow pipe and in which the measuring channel is developed, and at least one sensor chip, disposed in the measuring channel, for determining the parameter of the fluid medium. The sensor housing has a plurality of channel walls, which delimit the measuring channel. The sensor chip is situated on a sensor carrier. At least in the region of the sensor carrier, at least a first channel wall of the plurality of channel walls and a second channel wall of the plurality of channel walls, which differs from the first channel wall, or the sensor carrier have at least partly magnetic properties.

First claim

The invention claimed is:

1. A sensor for determining at least one parameter of a fluid medium streaming through a measuring channel, the sensor comprising:
a plug-in sensor housing which is introduced or able to be introduced into a flow pipe and in which the measuring channel is situated; and
at least one sensor chip, disposed in the measuring channel, to determine the at least one parameter of the fluid medium;
wherein the plug-in sensor housing has a plurality of channel walls which delimit the measuring channel, the sensor chip being situated on a sensor carrier at least in a region of the sensor carrier; and
wherein one of: (i) at least a first channel wall of the plurality of channel walls and a second channel wall of the plurality of channel walls, which differs from the first channel wall, at least partly have magnetic properties, wherein the first channel wall is a part or a section of a measuring channel cover, or (ii) the sensor carrier at least partly has magnetic properties,
wherein the sensor carrier has a top surface, the sensor chip being embedded in the top surface such that the sensor chip ends flush with the top surface.

2. The sensor as recited in claim 1 , wherein the sensor is for determining an induction air-mass flow of an internal combustion engine.

3. The sensor as recited in claim 1 , wherein one of: (i) the first channel wall and the second channel wall, or (ii) the sensor carrier, are developed to generate a magnetic field perpendicular to a main flow direction of the fluid medium in the measuring channel as well as perpendicular to a plane of the sensor region, at least in the region of the sensor carrier.

4. The sensor as recited in claim 1 , wherein the first channel wall faces the sensor chip.

5. The sensor as recited in claim 1 , wherein the first channel wall and the second channel wall of the plurality of channel walls have at least partially magnetic properties, the second channel wall facing away from the sensor chip.

6. The sensor as recited in claim 1 , wherein one of: (i) the first channel wall and the second channel wall, or (ii) the sensor carrier, are at least partially produced from a magnetic material.

7. The sensor as recited in claim 1 , wherein one of: (i) the first channel wall and the second channel wall, or (ii) the sensor carrier, are at least partially produced from a ferromagnetic material.

8. The sensor as recited in claim 1 , wherein one of: (i) the first channel wall and the second channel wall, or (ii) the sensor carrier, are at least partially produced from plastic and a ferromagnetic material.

9. The sensor as recited in claim 1 , wherein the second channel wall is a part or a section of a base of the sensor housing.

10. A sensor for determining at least one parameter of a fluid medium streaming through a measuring channel, the sensor comprising:
a plug-in sensor housing which is introduced or able to be introduced into a flow pipe and in which the measuring channel is situated; and
at least one sensor chip, disposed in the measuring channel, to determine the at least one parameter of the fluid medium;
wherein the plug-in sensor housing has a plurality of channel walls which delimit the measuring channel, the sensor chip being situated on a sensor carrier at least in a region of the sensor carrier; and
wherein one of: (i) at least a first channel wall of the plurality of channel walls and a second channel wall of the plurality of channel walls, which differs from the first channel wall, at least partly have magnetic properties, wherein the first channel wall is a part or a section of a measuring channel cover, or (ii) the sensor carrier at least partly has magnetic properties,
wherein the sensor carrier has a top surface, the sensor chip being embedded in the top surface, and one of: (i) the first channel wall and the second channel wall, or (ii) the sensor carrier, are developed to generate a magnetic field perpendicular to the top surface in at least a region of the sensor carrier.

11. A sensor for determining at least one parameter of a fluid medium streaming through a measuring channel, the sensor comprising:
a plug-in sensor housing which is introduced or able to be introduced into a flow pipe and in which the measuring channel is situated; and
at least one sensor chip, disposed in the measuring channel, to determine the at least one parameter of the fluid medium;
wherein the plug-in sensor housing has a plurality of channel walls which delimit the measuring channel, the sensor chip being situated on a sensor carrier at least in a region of the sensor carrier; and

wherein one of: (i) at least a first channel wall of the plurality of channel walls and a second channel wall of the plurality of channel walls, which differs from the first channel wall, at least partly have magnetic properties, wherein the first channel wall is a part or a section of a measuring channel cover, or (ii) the sensor carrier at least partly has magnetic properties,
wherein one of: (i) the first channel wall and the second channel wall, or (ii) the sensor carrier, are at least partially produced from plastic and a ferromagnetic material,
wherein the ferromagnetic material is embedded in the plastic in the form of particles.

12. A sensor for determining at least one parameter of a fluid medium streaming through a measuring channel, the sensor comprising:
a plug-in sensor housing which is introduced or able to be introduced into a flow pipe and in which the measuring channel is situated; and
at least one sensor chip, disposed in the measuring channel, to determine the at least one parameter of the fluid medium;
wherein the plug-in sensor housing has a plurality of channel walls which delimit the measuring channel, the sensor chip being situated on a sensor carrier at least in a region of the sensor carrier; and

wherein one of: (i) at least a first channel wall of the plurality of channel walls and a second channel wall of the plurality of channel walls, which differs from the first channel wall, at least partly have magnetic properties, wherein the first channel wall is a part or a section of a measuring channel cover, or (ii) the sensor carrier at least partly has magnetic properties,
wherein one of: (i) the first channel wall and the second channel wall, or (ii) the sensor carrier, are at least partially produced from plastic and a ferromagnetic material,
wherein the ferromagnetic material is embedded in the plastic in the form of an insertion part.

Assignees

• Bosch Gmbh Robert

Inventors

• Markov Alexander
• Sommer Edda
• Konzelmann Uwe

Classifications

• G01F15/12

  Cleaning arrangements; Filters · CPC title

• G01F1/6842 Primary

  with means for influencing the fluid flow · CPC title

• G01F1/692

  Thin-film arrangements · CPC title