Detection device and method for producing a detection device

Patent metadata

Field	Value
Publication number	US-9714851-B2
Application number	US-201314758442-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Dec 27, 2012
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

The invention relates to a detection device for detecting a property of a medium, comprising at least one detection sensor, wherein the detection sensor is arranged in a housing, the housing comprising a housing cover. The housing cover is a one-piece molded part, and a compensation element is arranged on or in the housing cover which forms at least one inlet channel with an inlet port for the medium. The inlet channel has a first portion and a second portion, wherein the first portion and the second portion are arranged at an angle different from zero to each other and a closure means closes the first portion of the inlet channel.

First claim

What is claimed is:

1. A method ( 600 ) for producing a detection device ( 100 ) for detecting a property of a medium, the method comprising
providing a housing ( 120 ), a detection sensor ( 130 ) arranged in the housing ( 120 ), and a compensation element ( 116 , 416 );
molding a housing cover ( 110 , 410 ) as a one-piece part, wherein the compensation element ( 116 , 416 ) is arranged on or in the housing cover ( 110 , 410 ), and wherein the housing cover ( 110 , 410 ) forms at least one inlet duct ( 113 , 413 ) with an inlet port ( 112 ) for the medium;
forming a first section of the inlet duct ( 413 a ) and a second section of the inlet duct ( 413 b ) as part of the one-piece molded part ( 110 , 410 ) such that the first section ( 413 a ) and the second section ( 413 b ) are arranged at an angle different from zero to each other, wherein the first section of the inlet duct ( 413 a ) is formed by means of a single demolding tool removed from the one-piece molded part ( 110 , 410 ), wherein the first section of the inlet duct ( 413 a ) has a compensation opening ( 114 , 414 ), and wherein the cross-sectional area of the first section ( 413 a ) is formed so as to be constant or so as to widen in the longitudinal extent of the first section ( 413 a ) in the direction of the compensation opening ( 114 , 414 ); and
closing the first section ( 413 a ) with a closure means ( 450 ).

2. The method ( 600 ) as claimed in claim 1 , wherein
the medium is a fluid,
the first section of the inlet duct ( 413 a ) communicates with a first volume (V 1 ),
the second section of the inlet duct ( 413 b ) communicates with a second volume (V 2 ), and
the compensation element ( 116 , 416 ) compensates the properties, to be measured, of the fluid in the first volume (V 1 ) and the corresponding properties of the fluid in the second volume (V 2 ).

3. The method ( 600 ) as claimed in claim 2 , characterized in that the property, to be measured, of the fluid is at least one of the following: a pressure; a change in pressure; a volume; a change in volume; a temperature; a change in temperature; a mass and a change in mass of the fluid.

4. The method ( 600 ) as claimed in claim 2 , characterized in that the compensation element ( 116 , 416 ) is a pressure compensation element and causes the distribution of the fluid in the first volume (V 1 ) and in the second volume (V 2 ) to be essentially the same.

5. The method ( 600 ) as claimed in claim 2 , wherein the medium is a gas.

6. The method ( 600 ) as claimed in claim 1 , characterized in that the closure means is a closure element ( 450 ), and in that the compensation element ( 116 , 416 ) is arranged in or on the closure element ( 450 ).

7. The method ( 600 ) as claimed in claim 6 , characterized in that in order to close the compensation opening ( 116 , 416 ) of the first section ( 413 a ), the closure element ( 450 ) is pressed in, welded in, or bonded in.

8. The method ( 600 ) as claimed in claim 7 , wherein
the medium is a fluid,
the first section of the inlet duct ( 413 a ) communicates essentially with a first volume (V 1 ),
the second section of the inlet duct ( 413 b ) communicates essentially with a second volume (V 2 ), and
the compensation element ( 116 , 416 ) essentially compensates the properties, to be measured, of the fluid in the first volume (V 1 ) and the corresponding properties of the fluid in the second volume (V 2 ).

9. The method ( 600 ) as claimed in claim 8 , characterized in that the property, to be measured, of the fluid is at least one of the following: a pressure; a change in pressure; a volume; a change in volume; a temperature; a change in temperature; a mass and a change in mass of the fluid.

10. The method ( 600 ) as claimed in claim 9 , characterized in that the compensation element ( 116 , 416 ) is a pressure compensation element and causes the distribution of the fluid in the first volume (V 1 ) and in the second volume (V 2 ) to be essentially the same.

11. The method ( 600 ) as claimed in claim 6 , characterized in that in order to close the compensation opening ( 116 , 416 ) of the first section ( 413 a ), the closure element ( 450 ) is pressed in, welded in by means of ultrasonic welding or laser welding, or bonded in.

12. The method ( 600 ) as claimed in claim 6 , wherein
the medium is a fluid,
the first section of the inlet duct ( 413 a ) communicates essentially with a first volume (V 1 ),
the second section of the inlet duct ( 413 b ) communicates essentially with a second volume (V 2 ), and
the compensation element ( 116 , 416 ) essentially compensates the properties, to be measured, of the fluid in the first volume (V 1 ) and the corresponding properties of the fluid in the second volume (V 2 ).

13. The method ( 600 ) as claimed in claim 12 , characterized in that the property, to be measured, of the fluid is at least one of the following: a pressure; a change in pressure; a volume; a change in volume; a temperature; a change in temperature; a mass and a change in mass of the fluid.

14. The method ( 600 ) as claimed in claim 13 , characterized in that the compensation element ( 116 , 416 ) is a pressure compensation element and causes the distribution of the fluid in the first volume (V 1 ) and in the second volume (V 2 ) to be essentially the same.

Assignees

• Bosch Gmbh Robert

Inventors

• Bertsch Benjamin
• Woernle Wolfgang
• Seitz Roland
• Walz Michel

Classifications

• G01D11/245 Primary

  Housings for sensors · CPC title

• B29D99/006

  Producing casings, e.g. accumulator cases · CPC title