DE102004031184B3 - Motor vehicle`s body component, has detector unit including voltage source and voltmeter for measuring electrical signal, and detecting change of state of measured electrical signal to identify fissure in structural component - Google Patents
Motor vehicle`s body component, has detector unit including voltage source and voltmeter for measuring electrical signal, and detecting change of state of measured electrical signal to identify fissure in structural component Download PDFInfo
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- DE102004031184B3 DE102004031184B3 DE200410031184 DE102004031184A DE102004031184B3 DE 102004031184 B3 DE102004031184 B3 DE 102004031184B3 DE 200410031184 DE200410031184 DE 200410031184 DE 102004031184 A DE102004031184 A DE 102004031184A DE 102004031184 B3 DE102004031184 B3 DE 102004031184B3
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- Prior art keywords
- electrical signal
- detector unit
- component
- structural component
- motor vehicle
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/46—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by spectral analysis, e.g. Fourier analysis or wavelet analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
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- Physics & Mathematics (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- Mathematical Physics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Die Erfindung betrifft eine Karosseriekomponente eines Kraftfahrzeugs mit zumindest einem Strukturbauteil aus Blech.The The invention relates to a body component of a motor vehicle with at least one structural component made of sheet metal.
Eine selbsttragende Karosserie besteht aus mehreren hunderten verschieden geformten Blechteilen, Blechhohlkörpern und Schalen. Zu den sogenannten Strukturbauteilen zählen alle tragenden stabilitäts- und sicherheitsrelevanten Karosseriekomponenten, beispielsweise Längs- und Querträger, Seitenschweller und die A-, B- oder C-Säulen. Aus technischer Sicht müssen diese immer ein Höchstmaß an Sicherheit garantieren. Die Karosseriesteifigkeit ist einer der wesentlichen Schlüssel für Sicherheit, Stabilität, Komfort und Haltbarkeit eines Kraftfahrzeugs. Eine Verformung der Karosserie würde sich unmittelbar auf das gesamte Fahrverhalten des Fahrzeugs auswirken.A self-supporting body consists of several hundreds different shaped sheet metal parts, sheet metal hollow bodies and shells. To the so-called Count structural components all supporting stability and safety-related body components, for example Along- and crossbeams, Side skirts and the A, B or C pillars. From a technical perspective have to This always the highest level of security to guarantee. The body rigidity is one of the essential key for security, Stability, Comfort and durability of a motor vehicle. A deformation of the Body would directly affect the overall handling of the vehicle.
Durch immer größer werdenden Wartungs- und Inspektionsintervalle, möglichst geringe Wandstärken der Strukturbauteile sowie Einsparung von Fügeverbindungen, insbesondere Schweißnähten, werden die Karosserie und deren Strukturbauteile immer mehr belastet. Insbesondere an kritischen Verbindungsstellen, die im Fahrbetrieb statischen und hohen dynamischen Belastungen, insbesondere Schwingungsbelastungen unterliegen, kann es zu Bauteilermüdungen bis hin zur Rissbildung kommen. Eine Beschädigung von tragenden Strukturbauteilen der Karosserie ist jedoch insbesondere unter Sicherheitsaspekten problematisch.By ever-growing Maintenance and inspection intervals, minimum wall thicknesses of the Structural components and saving of joints, in particular Welds, be the body and its structural components increasingly burdened. Especially at critical junctions that are static while driving high dynamic loads, especially vibration loads may lead to component fatigue and even cracking come. A damage however, particular of structural structural components of the body problematic from a safety point of view.
Durch
die
In
der
Die
Die
Die
In
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Der Erfindung liegt die Aufgabe zugrunde, ein Kraftfahrzeug sicherheitstechnisch zu verbessern und eine Karosseriekomponente aufzuzeigen, bei dem eine Schadensfrüherkennung möglich ist.Of the Invention is the object of a motor vehicle safety to improve and to show a body component in which a damage early detection possible is.
Die Lösung dieser Aufgabe besteht nach der Erfindung in einer Karosseriekomponente gemäß den Merkmalen von Patentanspruch 1.The solution This object is according to the invention in a body component according to the characteristics of claim 1.
Die Risserkennung an der Karosseriekomponente wird über eine elektrische Analyse durchgeführt, beispielsweise durch eine elektrische Widerstands- oder Spannungsmessung. Hierzu weist die Detektor-Einheit Mittel zur Messung elektrischer Signale auf. Hierbei handelt es sich um am Strukturbauteil applizierte Spannungssonden, eine Spannungsquelle und einen Strom-, Spannungs- oder Widerstandsmesser.The Crack detection on the body component is via an electrical analysis carried out, for example, by an electrical resistance or voltage measurement. For this purpose, the detector unit has means for measuring electrical Signals on. This is applied to the structural component Voltage probes, a voltage source and a current, voltage or ohmmeter.
Ein elektrisches Prüfverfahren ist beispielsweise auch gut geeignet, um die Qualität von Klebeverbindungen des Strukturbauteils bzw. zwischen Strukturbauteilen zu prüfen. Der Klebefilm zwischen den Blechen eines Strukturbauteils oder zwischen den Strukturbauteilen wirkt als Isolator. Wird die Verbindung unterbrochen, führt dies zu einer Änderung eines elektrischen Eingangssignals, beispielsweise einer angelegten Spannung. Diese Zustandsänderung wird zur Risserkennung herangezogen.An electrical test method is for example also well suited to the quality of adhesive joints of the structural component or between Check structural components. The adhesive film between the sheets of a structural component or between the structural components acts as an insulator. If the connection is interrupted, this leads to a change of an electrical input signal, for example an applied voltage. This change of state is used for crack detection.
Die Karosseriekomponente besteht aus zumindest einem Strukturbauteil aus Blech. Erfindungsgemäß ist dem Strukturbauteil eine Detektor-Einheit zur Risserkennung zugeordnet, welche mit einer Diagnoseeinheit in Verbindung steht.The Body component consists of at least one structural component made of sheet metal. According to the invention Structural component associated with a detector unit for crack detection, which is connected to a diagnostic unit.
Über die Detektor-Einheit werden Risse an dem Strukturbauteil bzw. zwischen miteinander verbundenen Strukturbauteilen ermittelt und über die Diagnoseeinheit zur Anzeige gebracht. Die Beschädigung wird erkannt, bevor es zu größeren Schäden oder dem Komplettversagen der Karosseriekomponente kommt. Schwerwiegende Unfälle können so vermieden werden. Bei Auftreten eines Risses an der Karosseriekomponente wird dies signalisiert, beispielsweise als visuelles oder akustisches Signal im Kraftfahrzeug. Hierzu steht die Diagnoseeinheit mit einem Bordcomputer und dem Check-Kontroll-System des Kraftfahrzeugs in Verbindung. Auch kann eine Schnittstelle vorgesehen sein, über die eine Zustandsabfrage in einer Werkstatt vorgenommen werden kann.About the Detector unit cracks on the structural component or between Determined interconnected structural components and on the Diagnostic unit displayed. The damage is detected before it to greater damage or the complete failure of the body component comes. serious accidents can to be avoided. If a crack occurs on the body component this is signaled, for example as a visual or acoustic Signal in the motor vehicle. For this purpose, the diagnostic unit with a On-board computer and the check-control system of the motor vehicle in Connection. Also, an interface may be provided via the a status query can be made in a workshop.
Vorteilhafte Ausführungsformen des grundsätzlichen Erfindungsgedankens sind in den abhängigen Ansprüchen 2 und 3 aufgezeigt.advantageous embodiments of the fundamental The inventive idea are in the dependent claims 2 and 3 shown.
Die Risserkennung an der Karosseriekomponente kann durch eine Schallprüfung, insbesondere durch eine Ultraschallprüfung vorgenommen werden. Demzufolge weist die Detektor-Einheit mittel zur Schallmessung auf, insbesondere zumindest einen Schallsender und einen Schallempfänger. Vom Schallsender werden Ultraschallwellen durch die Kraftfahrzeugkomponente gesandt. Die Schallwellen durchdringen die Kraftfahrzeugkomponente und werden an Grenzflächen sowie an Fehlerstellen, nämlich Rissen, reflektiert. Die zurückkommenden Schallwellen werden vom Schallempfänger erfasst, in elektrische Schwingungen umgewandelt und über die Diagnoseeinheit zwecks Risserkennung ausgewertet.The Crack detection on the body component can by a sound test, in particular by an ultrasonic test be made. Consequently, the detector unit has medium for sound measurement, in particular at least one sound transmitter and a sound receiver. From the sound transmitter are ultrasonic waves through the motor vehicle component sent. The sound waves penetrate the motor vehicle component and are at interfaces as well as at fault locations, namely cracks, reflected. The returning ones Sound waves are detected by the sound receiver, in electrical Vibrations are transformed and over the diagnostic unit is evaluated for the purpose of crack detection.
Im Rahmen der Erfindung kann auch eine Schallemissionsanalyse zur Risserkennung durchgeführt werden. Die Schallemissionsanalyse beruht auf Empfang und Analyse von Schallimpulsen, die durch hochfrequente Schwingungen der Karosseriekomponente bzw. deren Strukturbauteilen erzeugt werden. Diese werden durch piezzoelektrische Empfänger in elektrische Signale umgewandelt. Die Schallemissionen werden durch eine Rissentstehung und einen Rissfortschritt ausgelöst. Über die Detektor-Einheit werden die Schallimpulse aufgenommen und in der Diagnoseeinheit, deren Amplitudenform und das Frequenzspektrum analysiert und zur Risserkennung ausgewertet.in the The scope of the invention may also include a sonic emission analysis for crack detection carried out become. The sound emission analysis is based on reception and analysis of sound pulses caused by high-frequency vibrations of the body component or their structural components are generated. These are going through piezoelectric receiver converted into electrical signals. The sound emissions are triggered by cracking and crack propagation. About the Detector unit, the sound pulses are recorded and in the diagnostic unit, their amplitude shape and the frequency spectrum analyzed and the Crack detection evaluated.
Bei einer besonders vorteilhaften Ausführungsform einer Karosseriekomponente ist vorgesehen, dass an zumindest einem Strukturbauteil eine Piezzofolie angeordnet ist. Diese wirkt mit einem Regler zusammen. Bei einer Piezzofolie handelt es sich um ein piezzokeramisches Aktuator Sensorelement. Bei Auftreten einer Störschwingung an der Karosseriekomponente, insbesondere im kritischen Bereich, wird diese sensorisch erfasst und über die Piezzofolie eine Gegen- bzw. Kompensationsschwingung angeregt. Hierdurch wird eine Dämpfung der Störschwingung erreicht.at a particularly advantageous embodiment of a body component it is provided that on at least one structural component a piezo film is arranged. This interacts with a regulator. At a Piezzofoil is a piezoceramic actuator sensor element. When a spurious oscillation occurs on the body component, in particular in the critical area, is sensory detected and via the Piezzofolie a counter- or compensation oscillation excited. As a result, an attenuation of the spurious oscillation reached.
Die Erfindung ist nachfolgend anhand von zwei Ausführungsbeispielen beschrieben. Es zeigen:The Invention is described below with reference to two embodiments. Show it:
Bei
der in der
Am
Fuß
Die
- 11
- B-SäuleB-pillar
- 22
- Seitenschwellerside skirts
- 33
- Seitenschwellerside skirts
- 44
- SchweißnahtWeld
- 55
- SchweißnahtWeld
- 66
- Detektor-EinheitDetector unit
- 77
- Diagnoseeinheitdiagnostic unit
- 88th
- Schallelementsound element
- 99
-
Fuß v.
1 Foot v.1 - 1010
- PiezzofoliePiezzofolie
- 1111
- Strukturbauteilstructural component
- 1212
- Blechsheet
- 1313
- Blechsheet
- 1414
- Klebenahtadhesive seam
- 1515
- Detektor-EinheitDetector unit
- 1616
- Diagnoseeinheitdiagnostic unit
- 1717
- Spannungsquellevoltage source
- 1818
- Spannungsmesservoltmeter
- UU
- Ultraschallimpulsultrasonic pulse
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410031184 DE102004031184B3 (en) | 2004-06-28 | 2004-06-28 | Motor vehicle`s body component, has detector unit including voltage source and voltmeter for measuring electrical signal, and detecting change of state of measured electrical signal to identify fissure in structural component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410031184 DE102004031184B3 (en) | 2004-06-28 | 2004-06-28 | Motor vehicle`s body component, has detector unit including voltage source and voltmeter for measuring electrical signal, and detecting change of state of measured electrical signal to identify fissure in structural component |
Publications (1)
Publication Number | Publication Date |
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DE102004031184B3 true DE102004031184B3 (en) | 2005-10-06 |
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DE200410031184 Expired - Fee Related DE102004031184B3 (en) | 2004-06-28 | 2004-06-28 | Motor vehicle`s body component, has detector unit including voltage source and voltmeter for measuring electrical signal, and detecting change of state of measured electrical signal to identify fissure in structural component |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009074220A1 (en) * | 2007-12-12 | 2009-06-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Device and method for quality testing sheet metal parts |
DE102014222180A1 (en) * | 2014-10-30 | 2016-05-04 | Continental Automotive Gmbh | Circuit arrangement for detecting an unstable mechanical connection |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD293428A5 (en) * | 1990-04-05 | 1991-08-29 | Inst Energetik | METHOD AND DEVICE FOR DETERMINING DUPLICATIONS IN TINS |
EP0589066B1 (en) * | 1992-07-18 | 1997-04-23 | Inpro Innovationsgesellschaft Für Fortgeschrittene Produktionssysteme In Der Fahrzeugindustrie Mbh | Method for making products by force or pressure influenced drawing processes |
DE19837369A1 (en) * | 1998-08-18 | 2000-03-02 | Benteler Werke Ag | Acoustic crack detection during deep drawing using probes to pick up signals from different parts of the workpiece |
DE19936552A1 (en) * | 1999-08-03 | 2001-03-01 | Manfred Markworth | Indicating cracks in rotating transmission belts involves detecting primary damage to transmission belt from effects of coupling distortion causing altered magnetism or field lines |
DE60002450T2 (en) * | 1999-03-04 | 2004-04-08 | Skf Industrie S.P.A. | ONE AXLE HUB UNIT FOR RAIL VEHICLES |
DE10325406A1 (en) * | 2003-06-05 | 2005-01-13 | Eads Deutschland Gmbh | Damage determination on structures to be tested by means of ultrasound |
-
2004
- 2004-06-28 DE DE200410031184 patent/DE102004031184B3/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD293428A5 (en) * | 1990-04-05 | 1991-08-29 | Inst Energetik | METHOD AND DEVICE FOR DETERMINING DUPLICATIONS IN TINS |
EP0589066B1 (en) * | 1992-07-18 | 1997-04-23 | Inpro Innovationsgesellschaft Für Fortgeschrittene Produktionssysteme In Der Fahrzeugindustrie Mbh | Method for making products by force or pressure influenced drawing processes |
DE19837369A1 (en) * | 1998-08-18 | 2000-03-02 | Benteler Werke Ag | Acoustic crack detection during deep drawing using probes to pick up signals from different parts of the workpiece |
DE60002450T2 (en) * | 1999-03-04 | 2004-04-08 | Skf Industrie S.P.A. | ONE AXLE HUB UNIT FOR RAIL VEHICLES |
DE19936552A1 (en) * | 1999-08-03 | 2001-03-01 | Manfred Markworth | Indicating cracks in rotating transmission belts involves detecting primary damage to transmission belt from effects of coupling distortion causing altered magnetism or field lines |
DE10325406A1 (en) * | 2003-06-05 | 2005-01-13 | Eads Deutschland Gmbh | Damage determination on structures to be tested by means of ultrasound |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009074220A1 (en) * | 2007-12-12 | 2009-06-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Device and method for quality testing sheet metal parts |
US8365598B2 (en) | 2007-12-12 | 2013-02-05 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Device and method for quality testing sheet metal parts |
DE102014222180A1 (en) * | 2014-10-30 | 2016-05-04 | Continental Automotive Gmbh | Circuit arrangement for detecting an unstable mechanical connection |
DE102014222180B4 (en) * | 2014-10-30 | 2016-06-02 | Continental Automotive Gmbh | Circuit arrangement for detecting an unstable mechanical connection |
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