WO2005085777A1 - Kraftmessvorrichtung - Google Patents
Kraftmessvorrichtung Download PDFInfo
- Publication number
- WO2005085777A1 WO2005085777A1 PCT/EP2005/050286 EP2005050286W WO2005085777A1 WO 2005085777 A1 WO2005085777 A1 WO 2005085777A1 EP 2005050286 W EP2005050286 W EP 2005050286W WO 2005085777 A1 WO2005085777 A1 WO 2005085777A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measuring device
- force measuring
- rigid housing
- housing
- spring elements
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
- G01G19/4142—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling activation of safety devices, e.g. airbag systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
Definitions
- the invention relates to a force measuring device.
- the force measuring device has a one-piece housing made of metal, with upper and lower rigid housing parts which are resiliently movable relative to one another.
- a deflection sensor is mounted between the two rigid housing parts, which can detect the deflection of the two rigid housing parts relative to one another and can transmit this as an electrical signal.
- the housing of the force measuring device can be made in one piece and made of spring metal, with rigid housing parts (220) and (222) and spring means (232, 234) that hold the rigid housing parts (220, 222) (FIG. 4 and column 8, rows) 18 to 27).
- a deflection sensor is arranged between the two rigid housing parts (220, 222), for example an inductive deflection sensor (190, 192, 194, 196, 198) (FIG. 3), which detects a deflection of the rigid housing parts (220, 222) and into one Can convert measurement signal that provides information about the force acting on the force measuring device.
- German published patent application DE 101 45 370 A1 discloses a similar force measuring device made of a one-piece metal housing (FIG. 4b and column 6, paragraph [0059]), but with a different sensor principle.
- the known force measuring devices In order to be able to use them in a motor vehicle, the known force measuring devices have to be made very small, on the one hand, to take into account the limited installation space between a vehicle seat and the vehicle chassis, and, on the other hand, have to be extremely dimensionally stable over the entire service life of a vehicle, usually at least 15 years to avoid systematic incorrect measurements of the deflection sensor over time.
- these two requirements for the known force measuring devices are contradictory and seem to be incompatible with one another:
- a very solid and rather large housing speaks for the force measuring device for a permanently dimensionally stable housing that can withstand the very heavy weight loads of up to 1.2 t during operation of a motor vehicle ,
- a small installation space rather requires a filigree, small housing.
- the object of the present invention is to create a force measuring device with a permanently dimensionally stable, hysteresis-free housing, which is at the same time very small and can be easily manufactured.
- the object is achieved by a force measuring device according to claim 1.
- the force measuring device comprises a one-piece housing made of metal.
- the housing comprises an upper rigid housing part and a lower rigid housing part which are connected to one another via U-shaped spring elements and which can be moved resiliently against one another under the action of a force along an axis of movement.
- the spring elements are arranged symmetrically with respect to one another with respect to a cut surface parallel to the movement axis.
- a deflection sensor for detecting the relative movement of the two rigid housing parts relative to one another is mounted between the upper and lower rigid housing parts.
- the housing is manufactured using metal injection molding (MIM) technology.
- MIM metal injection molding
- MIM technology also known as powder metal injection molding, mixes and granulates fine metal powder with primary binders, creating a feedstock.
- the feedstock is melted in an injection molding machine and injected into the molded part in a mold. After cooling, the components are removed as so-called green compacts.
- the binder is then removed from the green compacts in an oven expelled.
- the binderless components are now called brown parts and are then sintered in a high-temperature furnace.
- MIM technology combines the freedom of shape of plastic injection molding with powder metallurgy.
- the MIM process therefore offers the possibility of cost-effectively producing large quantities of highly integrated metal parts with complex geometries and with high precision.
- the one-piece design of the housing according to the invention makes it possible to avoid previously complex joining processes between different components of the housing, as a result of which - as a result of the reduced number of joining edges - hysteresis phenomena in the force measuring device according to the invention can be considerably reduced.
- FIG. 1 shows an exemplary embodiment for a force measuring device (1) according to the invention in cross section
- FIG. 2 shows the force measuring device according to FIG. 1 in a perspective view
- 3 shows the force measuring device according to FIG. 1 in a top view
- FIG. 4 shows the force measuring device from FIG. 1 in a cross-sectional illustration along the sectional area AA.
- Figure 1 shows an advantageous development of a power device 1 according to the invention, consisting of a one-piece housing 2, which is made in metal injection molding (MIM) technology.
- the housing has an upper housing part 25 and a lower housing part 26, which are rigid in comparison to the U-shaped spring elements 21 and 22 connecting these two housing parts 25, 26, so that these two rigid housing parts 25 and 26 are indeed one another can move towards or away from each other under the influence of a weight, but ideally do not deform themselves.
- MIM metal injection molding
- a deflection sensor 6 is attached, which can detect a relative movement of the two housing parts 25, 26 relative to one another and convert it into an electrical signal, which is led to evaluation electronics via a plug connection (not shown) via a plug 5, or is further processed in an evaluation electronics within the connector 5.
- This signal is fed to an occupant protection device, also not shown, and is available there as information about the weight acting on the force measuring device 1, on the basis of which an occupant restraint device is triggered in an adapted manner, if necessary.
- each of the spring elements tapers continuously starting from the upper rigid housing part 25 until it reaches a minimum wall thickness d at the beginning of the bend to the U-loop. From this point, the wall thickness increases again around the apex of the U-loop, decreases again after the loop winding and remains constant until the transition into the lower rigid housing part 26. Since the sectional area AA represents a plane of symmetry of the spring element, the course of the wall thickness is d along the spring element is equal to that of the spring element 22.
- the housing 1 shown as two integral components behind each of the two spring loops 21 and 22 shown each has a fastening tab 4, by means of which the force measuring device 1 is connected to the vehicle chassis by means of two screws 7.
- Other fastening means could be used instead of screws, for example rivets or the like.
- FIG. 2 shows the force measuring device of Figure 1 in perspective. It can be seen that again a further pair of U-shaped spring elements 24 and 25 are arranged symmetrically around the two rigid housing parts 25 and 26 behind the two fastening means 4 with the associated screws 1.
- the four spring loops 21, 22, 23, 24 shown can be made so narrow that the fastening points of the force measuring device 1 are arranged within the same base area can be taken up by the entire housing 2 including spring elements 21, 22, 23 and 24.
- This base area is shown again in plan view in FIG. 4.
- FIG. 4 shows a cross section through the housing 2 of the force measuring device 1 along the section line AA in FIG were.
- each of the two overload protection elements 8 and 9 are firmly connected to the upper rigid housing part 25, for example by means of a screw connection.
- the diameter of each of the two overload protection elements 8 and 9 increases in steps and is spaced from the lower rigid housing part 26 by an approximately constant narrow air gap.
- the two overload protection elements 8 and 9 emerge from the housing 2 as soon as a force acts on the force introduction means 3 in the direction of the lower rigid housing part 26.
- a further deflection of the two rigid housing parts 25 and 26 to one another, with a further increased force effect, is only prevented when the two overload protection elements 8 and 9 have emerged from the housing 2 to such an extent that they encounter resistance from the vehicle chassis.
- the two rigid housing parts 25 and 26 are deflected relative to one another until the gap between the lower rigid housing part 26 and the step in each of the two overload protection elements is closed.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05707831A EP1721135A1 (de) | 2004-03-03 | 2005-01-24 | Kraftmessvorrichtung |
JP2007501257A JP2007525683A (ja) | 2004-03-03 | 2005-01-24 | 力測定装置 |
US10/591,488 US7402763B2 (en) | 2004-03-03 | 2005-01-24 | MIM force measuring device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004010367.4 | 2004-03-03 | ||
DE102004010367A DE102004010367A1 (de) | 2004-03-03 | 2004-03-03 | Kraftmessvorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005085777A1 true WO2005085777A1 (de) | 2005-09-15 |
Family
ID=34894932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/050286 WO2005085777A1 (de) | 2004-03-03 | 2005-01-24 | Kraftmessvorrichtung |
Country Status (7)
Country | Link |
---|---|
US (1) | US7402763B2 (de) |
EP (1) | EP1721135A1 (de) |
JP (1) | JP2007525683A (de) |
KR (1) | KR20060132986A (de) |
CN (1) | CN1926411A (de) |
DE (1) | DE102004010367A1 (de) |
WO (1) | WO2005085777A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1881314A2 (de) * | 2006-07-18 | 2008-01-23 | Trafag AG | Profiliertes Bauelement aus Metall für Fluidumhüllungen sowie Verfahren zum Vorsehen eines Drucksensors daran |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004035982A1 (de) * | 2004-07-23 | 2006-03-16 | Siemens Ag | Kraftmessvorrichtung |
ITBO20050244A1 (it) * | 2005-04-15 | 2006-10-16 | Ferrari Spa | Sistema di montaggio con misurazione del peso dell'occupante per un sedile di un autoveicolo |
KR20070094366A (ko) * | 2006-03-17 | 2007-09-20 | 타이코에이엠피 주식회사 | 차량좌석용 중량센서 |
JP5627556B2 (ja) * | 2011-10-31 | 2014-11-19 | アイシン精機株式会社 | 車両用シートの荷重検出装置 |
US8887585B2 (en) * | 2011-11-26 | 2014-11-18 | Tecsis Gmbh | Force-sensing device for measuring a traction-and/or pressure force load in structure |
EP3312556A1 (de) * | 2016-10-23 | 2018-04-25 | Vrije Universiteit Brussel | Mechanische verformungs verstärkender wandler |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB882989A (en) * | 1959-02-20 | 1961-11-22 | Schenck Gmbh Carl | Device for measuring forces |
US3263496A (en) * | 1963-03-14 | 1966-08-02 | Radson Engineering Corp | Load cell and weighing system |
JPH04370727A (ja) * | 1991-06-19 | 1992-12-24 | Fujikura Ltd | 半導体圧力センサの製造方法 |
US6089106A (en) * | 1998-09-04 | 2000-07-18 | Breed Automotive Technology, Inc. | Force sensor assembly |
DE10004484A1 (de) * | 1999-02-03 | 2001-02-01 | Trw Inc | Gewichtsabfühlende Vorrichtung für Fahrzeugsitz |
DE10145370A1 (de) * | 2001-09-14 | 2002-12-05 | Siemens Ag | Vorrichtung zum Aufnehmen einer auf einen Sitz, insbesondere einen Fahrzeugsitz, einwirkenden Kraft |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5183126A (en) * | 1988-03-18 | 1993-02-02 | Arthur Kellenbach | Weighing system and force transmission |
DE10154231A1 (de) * | 2000-11-09 | 2002-08-01 | Hammerstein Gmbh C Rob | Nachweiseinheit für die Belegung eines Kraftfahrzeugsitzes durch einen Passagier und damit ausgerüsteter Kraftfahrzeugsitz |
US7189931B2 (en) * | 2003-03-05 | 2007-03-13 | Kabushiki Kaisha Imasen Denki Seisakusho | Seat occupant load sensor |
-
2004
- 2004-03-03 DE DE102004010367A patent/DE102004010367A1/de not_active Withdrawn
-
2005
- 2005-01-24 EP EP05707831A patent/EP1721135A1/de not_active Withdrawn
- 2005-01-24 JP JP2007501257A patent/JP2007525683A/ja not_active Ceased
- 2005-01-24 KR KR1020067020484A patent/KR20060132986A/ko not_active Application Discontinuation
- 2005-01-24 WO PCT/EP2005/050286 patent/WO2005085777A1/de active Application Filing
- 2005-01-24 CN CNA200580006621XA patent/CN1926411A/zh active Pending
- 2005-01-24 US US10/591,488 patent/US7402763B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB882989A (en) * | 1959-02-20 | 1961-11-22 | Schenck Gmbh Carl | Device for measuring forces |
US3263496A (en) * | 1963-03-14 | 1966-08-02 | Radson Engineering Corp | Load cell and weighing system |
JPH04370727A (ja) * | 1991-06-19 | 1992-12-24 | Fujikura Ltd | 半導体圧力センサの製造方法 |
US6089106A (en) * | 1998-09-04 | 2000-07-18 | Breed Automotive Technology, Inc. | Force sensor assembly |
DE10004484A1 (de) * | 1999-02-03 | 2001-02-01 | Trw Inc | Gewichtsabfühlende Vorrichtung für Fahrzeugsitz |
DE10145370A1 (de) * | 2001-09-14 | 2002-12-05 | Siemens Ag | Vorrichtung zum Aufnehmen einer auf einen Sitz, insbesondere einen Fahrzeugsitz, einwirkenden Kraft |
Non-Patent Citations (3)
Title |
---|
JOHNSON J. L. ET AL: "Metal injection molding of multi-functional materials", PROCEEDINGS OF IMECE 03 ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS, 15 November 2003 (2003-11-15), WASHINGTON DC USA, XP002323484, Retrieved from the Internet <URL:http://www.mae.wvu.edu/~barbero/source/IMECE2003/disk_3/mat/41151.pdf> * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 254 (P - 1538) 19 May 1993 (1993-05-19) * |
See also references of EP1721135A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1881314A2 (de) * | 2006-07-18 | 2008-01-23 | Trafag AG | Profiliertes Bauelement aus Metall für Fluidumhüllungen sowie Verfahren zum Vorsehen eines Drucksensors daran |
EP1881314A3 (de) * | 2006-07-18 | 2010-10-06 | Trafag AG | Profiliertes Bauelement aus Metall für Fluidumhüllungen sowie Verfahren zum Vorsehen eines Drucksensors daran |
Also Published As
Publication number | Publication date |
---|---|
US7402763B2 (en) | 2008-07-22 |
US20070180930A1 (en) | 2007-08-09 |
EP1721135A1 (de) | 2006-11-15 |
KR20060132986A (ko) | 2006-12-22 |
CN1926411A (zh) | 2007-03-07 |
DE102004010367A1 (de) | 2005-09-29 |
JP2007525683A (ja) | 2007-09-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2005085777A1 (de) | Kraftmessvorrichtung | |
DE102008020865A1 (de) | Fahrzeugsitz mit einer Einrichtung für eine Fahrzeugsitzbelegungserkennung | |
DE3842791C2 (de) | ||
EP1771707A1 (de) | Kraftmessvorrichtung | |
DE102010036000A1 (de) | Mittelkonsole mit Linearführung | |
DE102006049840A1 (de) | Gurtaufroller für einen Fahrzeuginsassen-Sicherheitsgurt | |
DE102009002197A1 (de) | Befestigungseinrichtung für ein Kabel | |
DE10154231A1 (de) | Nachweiseinheit für die Belegung eines Kraftfahrzeugsitzes durch einen Passagier und damit ausgerüsteter Kraftfahrzeugsitz | |
DE102005005889B3 (de) | Rollenführung für ein Fahrzeugsitz-Schwingsystem mit Scherenführung | |
DE10152698A1 (de) | Nachweisvorrichtung für die Gewichtsbelastung eines Kraftfahrzeugsitzes, mit einem Sensor und einem Federkörper | |
WO2005087536A1 (de) | Kopfstütze eines fahrzeugsitzes mit einem stützkörper | |
EP1425513B1 (de) | Sensorvorrichtung und berfahren zum anordnen einer sensorvorrichtung auf einer montageplatte | |
EP2054275B1 (de) | Gurtkraft-messeinrichtung | |
DE102014224444B4 (de) | Aufpralldämpfende Bauteilanordnung für ein Kraftfahrzeug | |
EP1454118B1 (de) | Vorrichtung zur messung einer kraft- oder momentenkomponente | |
DE10252224A1 (de) | Kraftmesser, insbesondere zur Sitzgewichtsbestimmung in einem Kraftfahrzeug | |
DE10120976A1 (de) | Kraftmesszelle | |
DE102004008005A1 (de) | Anordnung zur Sensierung eines Frontaufpralls eines Kraftfahrzeuges | |
DE102006002069B4 (de) | Fahrzeugsitz, insbesondere Kraftfahrzeugsitz, mit einer Lehnen-bzw. einer Lehnen- und einer Höhenverstellung und einer Crashverlagerung der Rückenlehnenstruktur | |
DE102014005015A1 (de) | Betätigungssperre und Kraftfahrzeugtür | |
EP1145924B1 (de) | Vorrichtung zur Gurthöhenverstellung an Sicherheitsgurten | |
DE10356755A1 (de) | Kraftstoffstand-System für ein Automobil | |
DE102006035836B4 (de) | Gurtkraftmesseinrichtung | |
DE102005050787A1 (de) | Verbindungselement | |
DE10341334A1 (de) | Kraftmessvorrichtung |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2005707831 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007501257 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10591488 Country of ref document: US Ref document number: 2007180930 Country of ref document: US Ref document number: 200580006621.X Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020067020484 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 2005707831 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020067020484 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 10591488 Country of ref document: US |