DE102013216718A1 - Impact sensor with elastically deformable hose and pressure sensor and two-stage pressure compensation - Google Patents
Impact sensor with elastically deformable hose and pressure sensor and two-stage pressure compensation Download PDFInfo
- Publication number
- DE102013216718A1 DE102013216718A1 DE102013216718.0A DE102013216718A DE102013216718A1 DE 102013216718 A1 DE102013216718 A1 DE 102013216718A1 DE 102013216718 A DE102013216718 A DE 102013216718A DE 102013216718 A1 DE102013216718 A1 DE 102013216718A1
- Authority
- DE
- Germany
- Prior art keywords
- pressure
- housing
- sensor
- pressure compensation
- compensation element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0038—Fluidic connecting means being part of the housing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
- G01L19/0636—Protection against aggressive medium in general using particle filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
- G01L19/0654—Protection against aggressive medium in general against moisture or humidity
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Es wird ein Aufprallsensor mit elastisch deformierbarem Schlauch (6) und zumindest einem Drucksensor (4) beschrieben. Der Drucksensor (4) ist in einem Drucksensorgehäuse (2) angeordnet, wobei am Drucksensorgehäuse (2) ein Anschlussrohrstück (14) vorgesehen und an diesem der Schlauch (6) druckdicht befestigt ist. Im Inneren des Drucksensorgehäuses (2) ist ein Druckzuleitungskanal (13) zwischen dem Anschlussrohrstück (14) und dem Drucksensor (4) ausgebildet, wobei der Druckzuleitungskanal (13) gegenüber dem sonstigen Gehäuseinnenraum (11) durch eine Abtrennung, beispielsweise eine Dichtung 5 und einer Wandung 15 getrennt ist. Zwischen dem Druckzuleitungskanal (13) und dem sonstigen Gehäuseinnenraum (11) ist ein erstes Druckausgleichselement (12) vorgesehen, wobei dieses vorzugsweise als eine Öffnung bzw. ein Durchlasskanal in der Abtrennung (5, 15) ausgestaltet ist. Zwischen dem sonstigen Gehäuseinnenraum (11) und der Umgebung ist ein zweites Druckausgleichselement (9) vorgesehen, welches vorzugsweise als eine luftdichte, aber elastisch verformbare Membran ausgestaltet ist, welche vorzugsweise zusammen mit der Dichtung (5) als Weichkomponente in einem Zwei-Komponenten-Spritzgussteil gefertigt wird.An impact sensor with elastically deformable hose (6) and at least one pressure sensor (4) is described. The pressure sensor (4) is arranged in a pressure sensor housing (2), wherein a connecting pipe piece (14) is provided on the pressure sensor housing (2) and the hose (6) is attached pressure-tight thereon. In the interior of the pressure sensor housing (2), a pressure feed channel (13) between the connecting pipe piece (14) and the pressure sensor (4) is formed, wherein the pressure supply passage (13) relative to the other housing interior (11) by a separation, for example a seal 5 and a Wall 15 is separated. Between the pressure feed channel (13) and the other housing interior (11), a first pressure compensation element (12) is provided, which is preferably configured as an opening or a passage in the separation (5, 15). Between the other housing interior (11) and the environment, a second pressure compensation element (9) is provided, which is preferably designed as an airtight, but elastically deformable membrane, which preferably together with the seal (5) as a soft component in a two-component injection molded part is manufactured.
Description
Die Erfindung betrifft einen Aufprallsensor mit elastisch deformierbarem Schlauch und Drucksensor gemäß dem Oberbegriff von Anspruch 1. The invention relates to an impact sensor with elastically deformable hose and pressure sensor according to the preamble of claim 1.
Ein solcher Aufprallsensor ist beispielsweise aus der
Aus der
Die Aufgabe der vorliegenden Erfindung ist es, eine alternative Ausgestaltung eines solchen Aufprallsensors vorzustellen. Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen, wobei auch Kombinationen und Weiterbildungen einzelner Merkmale miteinander denkbar sind. The object of the present invention is to present an alternative embodiment of such an impact sensor. This object is solved by the features of the independent claims. Advantageous developments of the invention will become apparent from the dependent claims, and combinations and developments of individual features are conceivable with each other.
Ein wesentlicher Gedanke der Erfindung besteht darin, dass ein zweistufiger Druckausgleich erfolgt, indem einerseits zwischen dem Druckzuleitungskanal und dem sonstigen Gehäuseinnenraum ein erstes Druckausgleichselement vorgesehen ist und zudem zwischen dem sonstigen Gehäuseinnenraum und der Umgebung ein zweites Druckausgleichselement vorgesehen ist. An essential idea of the invention is that a two-stage pressure equalization takes place, on the one hand, between the pressure supply channel and the other housing interior a first pressure compensation element is provided and also between the other housing interior and the environment, a second pressure compensation element is provided.
Vorzugsweise wird dabei das aus allgemeinen Gehäusen bekannte Konzept der durch eine elastische, luftdichte Membran hervorgerufenen Volumenänderung für einen solchen Aufprallsensors geeignet zu übertragen, indem das zweite Druckausgleichselement eine luftdichte, aber elastisch verformbare Membran aufweist. Die Dicke und Materialwahl als auch die Fläche und das damit letztlich veränderbare Volumen definieren die Druckausgleichsgeschwindigkeit dieses zweiten Druckausgleichselement. Preferably, the concept known from general housings of the volume change caused by an elastic, air-tight membrane is suitably transferred for such an impact sensor in that the second pressure compensation element has an airtight but elastically deformable membrane. The thickness and choice of material as well as the surface and thus ultimately variable volume define the pressure equalization rate of this second pressure compensation element.
Vorzugsweise weist das erste Druckausgleichselement eine erste, vorzugsweise definiert vorgegebene Druckausgleichsgeschwindigkeit und das zweite Druckausgleichselement eine zweite, gegenüber der des ersten Druckausgleichselements höhere Druckausgleichsgeschwindigkeit auf. Dadurch kann eine beim Aufprall auftretende Druckänderung vom Druckzuleitungskanal zum Drucksensor geleitet und dort erfasst werden, ohne dass durch das erste Druckausgleichselement ein zu großer Anteil der Druckänderung in den sonstigen Gehäuseinnenraum entweichen würde. Preferably, the first pressure compensation element has a first, preferably defined predetermined pressure compensation speed and the second pressure compensation element has a second, compared to the first pressure compensation element higher pressure compensation speed. As a result, a change in pressure occurring during the impact can be conducted from the pressure feed duct to the pressure sensor and detected there, without an excessive proportion of the pressure change in the other housing interior being escaped by the first pressure equalization element.
Das erste Druckausgleichselement kann dabei vorzugsweise als eine Öffnung bzw. ein Durchlasskanal in der Abtrennung zwischen Druckzuleitungskanal und sonstigem Gehäuseinnenraum ausgestaltet sein, wobei die Abtrennung zwischen den Druckzuleitungskanal und den sonstigen Gehäuseinnenraum durch eine Dichtung oder Wand oder eine Kombination aus beidem gebildet sein kann und es unerheblich ist, ob die Öffnung in der Wand, in der Dichtung, an der Grenzfläche zwischen Wand und Dichtung oder an einer anderen Position angeordnet ist. Die Öffnung bzw. der Kanal weist eine der ersten Druckausgleichsgeschwindigkeit entsprechende Querschnittsfläche auf, dient also die Querschnittsfläche der konstruktiven Definition der gewünschten ersten Druckausgleichsgeschwindigkeit. The first pressure compensation element can preferably be configured as an opening or a passage in the separation between the pressure supply duct and other housing interior, wherein the separation between the pressure supply duct and the other housing interior can be formed by a seal or wall or a combination of both and it irrelevant is whether the opening is located in the wall, in the gasket, at the interface between wall and gasket or at another position. The opening or the channel has a cross-sectional area corresponding to the first pressure compensation speed, thus serving the cross-sectional area of the design definition of the desired first pressure compensation speed.
In einer besonders bevorzugten Ausgestaltung wird das Gehäuse als ein Zwei-Komponenten-Spritzgussteil hergestellt, wobei eine Hartkomponente das Gehäuse und dessen Wände formt und eine Weichkomponente die Membran als auch eine Dichtung zwischen dem Drucksensor und dem Gehäuse. Gerade wenn für die Ausbildung der Dichtung zwischen Drucksensor und Gehäuse bereits eh Zwei-Komponenten-Spritzgusstechnik zum Einsatz kommen soll, kann also die Membran in gleichem Fertigungsschritt und ohne signifikante Mehrkosten mit erzeugt werden. In a particularly preferred embodiment, the housing is manufactured as a two-component injection molded part, wherein a hard component forms the housing and its walls and a soft component forms the membrane as well as a seal between the pressure sensor and the housing. Especially if for the formation of the seal between the pressure sensor and housing already two-component injection molding technology should be used, so the membrane can be produced in the same manufacturing step and without significant additional costs.
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen unter Zuhilfenahme einer Figur näher erläutert. The invention will be explained in more detail by means of embodiments with the aid of a figure.
Die Figur zeigt einen teilweise aufgeschnittenen Teilabschnitt eines Aufprallsensors mit elastisch deformierbarem Schlauch (
Am Drucksensorgehäuse (
Zwischen dem Druckzuleitungskanal (
Zwischen dem sonstigen Gehäuseinnenraum (
Der Durchlasskanal (
Der Drucksensor (
Die Herstellung des Gehäuses erfolgt dabei vorzugsweise in Zwei-Komponenten-Spritzgußtechnik, wobei eine Hartkomponente das Gehäuse und dessen Wände formt, also insbesondere die Teile (
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102011011962 A1 [0002] DE 102011011962 A1 [0002]
- EP 937612 A2 [0002] EP 937612 A2 [0002]
- DE 4101516 C1 [0003] DE 4101516 C1 [0003]
- DE 9303501 U1 [0003] DE 9303501 U1 [0003]
Claims (6)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013216718.0A DE102013216718A1 (en) | 2013-08-22 | 2013-08-22 | Impact sensor with elastically deformable hose and pressure sensor and two-stage pressure compensation |
DE112014003812.1T DE112014003812A5 (en) | 2013-08-22 | 2014-04-08 | Impact sensor with elastically deformable hose and pressure sensor and two-stage pressure compensation |
PCT/DE2014/200161 WO2015024562A1 (en) | 2013-08-22 | 2014-04-08 | Impact sensor having an elastically deformable hose and pressure sensor and two-stage pressure compensation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013216718.0A DE102013216718A1 (en) | 2013-08-22 | 2013-08-22 | Impact sensor with elastically deformable hose and pressure sensor and two-stage pressure compensation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102013216718A1 true DE102013216718A1 (en) | 2015-02-26 |
Family
ID=50972405
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102013216718.0A Withdrawn DE102013216718A1 (en) | 2013-08-22 | 2013-08-22 | Impact sensor with elastically deformable hose and pressure sensor and two-stage pressure compensation |
DE112014003812.1T Pending DE112014003812A5 (en) | 2013-08-22 | 2014-04-08 | Impact sensor with elastically deformable hose and pressure sensor and two-stage pressure compensation |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE112014003812.1T Pending DE112014003812A5 (en) | 2013-08-22 | 2014-04-08 | Impact sensor with elastically deformable hose and pressure sensor and two-stage pressure compensation |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE102013216718A1 (en) |
WO (1) | WO2015024562A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018206210A1 (en) * | 2018-04-23 | 2019-10-24 | Continental Automotive Gmbh | Cover arrangement for a sensor and pedestrian protection sensor for a vehicle |
CN111044194A (en) * | 2019-12-18 | 2020-04-21 | 渤海造船厂集团有限公司 | Calandria assembly stress detection method |
CN111247408A (en) * | 2017-10-24 | 2020-06-05 | 罗伯特·博世有限公司 | Pressure sensor for an occupant protection system of a vehicle |
DE102020200832A1 (en) | 2020-01-24 | 2021-07-29 | Continental Automotive Gmbh | Impact sensor with a tubular body |
EP3835137B1 (en) * | 2019-12-10 | 2024-02-21 | Veoneer Sweden Safety Systems AB | Impact sensor assembly |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013217340A1 (en) * | 2013-08-30 | 2015-03-05 | Robert Bosch Gmbh | Method, device and system for checking a device for a vehicle for detecting an impact |
EP3118600B1 (en) | 2015-07-16 | 2018-09-26 | Autoliv Development AB | A vehicle safety system |
DE102017207563A1 (en) * | 2017-05-05 | 2018-11-08 | Continental Automotive Gmbh | Impact sensor with an elastically deformable in a collision hose and pressure sensor units and at least one means for pressure equalization |
WO2021148180A1 (en) | 2020-01-23 | 2021-07-29 | Continental Automotive Gmbh | Impact sensor with a tubular body |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4101516C1 (en) | 1991-01-19 | 1991-08-01 | Fa. Carl Freudenberg, 6940 Weinheim, De | |
DE9303501U1 (en) | 1993-03-10 | 1994-04-07 | Siemens Ag | Pressure compensation device for sealed housings |
DE19544974C1 (en) * | 1995-12-01 | 1997-05-22 | Siemens Ag | Control device, in particular for triggering a restraint in a vehicle |
EP0937612A2 (en) | 1998-02-24 | 1999-08-25 | Kabushiki Kaisha Toyota Chuo Kenkyusho | A collision discriminating apparatus for vehicles using detecting means in the front bumper |
DE10114465A1 (en) * | 2001-03-24 | 2002-09-26 | Volkswagen Ag | Detection of a motor vehicle impact by use of a contact sensor, in the form or a fluid filled tube, along the front bumper bar with attached pressure sensors, with the rate of pressure change used to indicate an impact |
DE102008043644A1 (en) * | 2008-11-11 | 2010-05-12 | Robert Bosch Gmbh | pressure sensor |
DE102009048067A1 (en) * | 2009-10-01 | 2011-04-07 | Continental Automotive Gmbh | Impact sensor, has adjusting unit adjusting pressure between tubular body and surrounding area, where tubular body is pressurized-connected with housing unit of sensing unit, and pressure is adjusted at housing unit |
DE102011011962A1 (en) | 2011-02-22 | 2012-08-23 | Continental Automotive Gmbh | Crash sensor for motor car, has deformable hose with cavity and pressure sensor for acquisition of pressure change in cavity of hose, where crash is resilient, and hose is made of cross linked silicone material |
DE102011083027A1 (en) * | 2011-09-20 | 2013-03-21 | Bayerische Motoren Werke Aktiengesellschaft | Device for detecting the impact of an object on a vehicle |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4133061A1 (en) * | 1991-10-04 | 1993-04-15 | Bosch Gmbh Robert | PRESSURE SENSOR |
DE10321209B4 (en) * | 2003-05-12 | 2006-11-16 | Siemens Ag | Impact sensor arrangement |
DE102011011963B4 (en) * | 2011-02-22 | 2020-03-12 | Continental Automotive Gmbh | Impact sensor with an elastically deformable hose and at least one pressure sensor |
-
2013
- 2013-08-22 DE DE102013216718.0A patent/DE102013216718A1/en not_active Withdrawn
-
2014
- 2014-04-08 DE DE112014003812.1T patent/DE112014003812A5/en active Pending
- 2014-04-08 WO PCT/DE2014/200161 patent/WO2015024562A1/en active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4101516C1 (en) | 1991-01-19 | 1991-08-01 | Fa. Carl Freudenberg, 6940 Weinheim, De | |
DE9303501U1 (en) | 1993-03-10 | 1994-04-07 | Siemens Ag | Pressure compensation device for sealed housings |
DE19544974C1 (en) * | 1995-12-01 | 1997-05-22 | Siemens Ag | Control device, in particular for triggering a restraint in a vehicle |
EP0937612A2 (en) | 1998-02-24 | 1999-08-25 | Kabushiki Kaisha Toyota Chuo Kenkyusho | A collision discriminating apparatus for vehicles using detecting means in the front bumper |
DE10114465A1 (en) * | 2001-03-24 | 2002-09-26 | Volkswagen Ag | Detection of a motor vehicle impact by use of a contact sensor, in the form or a fluid filled tube, along the front bumper bar with attached pressure sensors, with the rate of pressure change used to indicate an impact |
DE102008043644A1 (en) * | 2008-11-11 | 2010-05-12 | Robert Bosch Gmbh | pressure sensor |
DE102009048067A1 (en) * | 2009-10-01 | 2011-04-07 | Continental Automotive Gmbh | Impact sensor, has adjusting unit adjusting pressure between tubular body and surrounding area, where tubular body is pressurized-connected with housing unit of sensing unit, and pressure is adjusted at housing unit |
DE102011011962A1 (en) | 2011-02-22 | 2012-08-23 | Continental Automotive Gmbh | Crash sensor for motor car, has deformable hose with cavity and pressure sensor for acquisition of pressure change in cavity of hose, where crash is resilient, and hose is made of cross linked silicone material |
DE102011083027A1 (en) * | 2011-09-20 | 2013-03-21 | Bayerische Motoren Werke Aktiengesellschaft | Device for detecting the impact of an object on a vehicle |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111247408A (en) * | 2017-10-24 | 2020-06-05 | 罗伯特·博世有限公司 | Pressure sensor for an occupant protection system of a vehicle |
US11828886B2 (en) | 2018-03-21 | 2023-11-28 | Continental Automotive Gmbh | Cover assembly for a sensor and pedestrian protection sensor for a vehicle |
DE102018206210A1 (en) * | 2018-04-23 | 2019-10-24 | Continental Automotive Gmbh | Cover arrangement for a sensor and pedestrian protection sensor for a vehicle |
EP3835137B1 (en) * | 2019-12-10 | 2024-02-21 | Veoneer Sweden Safety Systems AB | Impact sensor assembly |
CN111044194A (en) * | 2019-12-18 | 2020-04-21 | 渤海造船厂集团有限公司 | Calandria assembly stress detection method |
DE102020200832A1 (en) | 2020-01-24 | 2021-07-29 | Continental Automotive Gmbh | Impact sensor with a tubular body |
DE102020200832B4 (en) | 2020-01-24 | 2022-11-10 | Continental Automotive Technologies GmbH | Impact sensor with a tubular body |
Also Published As
Publication number | Publication date |
---|---|
DE112014003812A5 (en) | 2016-05-04 |
WO2015024562A1 (en) | 2015-02-26 |
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