WO2006024263A1 - Ensemble capteur et procede pour detecter une influence exercee par des charges statiques et dynamiques sur des elements de construction - Google Patents

Ensemble capteur et procede pour detecter une influence exercee par des charges statiques et dynamiques sur des elements de construction Download PDF

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Publication number
WO2006024263A1
WO2006024263A1 PCT/DE2005/001457 DE2005001457W WO2006024263A1 WO 2006024263 A1 WO2006024263 A1 WO 2006024263A1 DE 2005001457 W DE2005001457 W DE 2005001457W WO 2006024263 A1 WO2006024263 A1 WO 2006024263A1
Authority
WO
WIPO (PCT)
Prior art keywords
construction elements
influence
strain gauges
static
sensor
Prior art date
Application number
PCT/DE2005/001457
Other languages
German (de)
English (en)
Inventor
Dieter Hentschel
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Publication of WO2006024263A1 publication Critical patent/WO2006024263A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0083—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by measuring variation of impedance, e.g. resistance, capacitance, induction

Definitions

  • the invention relates to a sensor arrangement and a method using this sensor arrangement for the detection of static and dynamic loads acting on construction elements.
  • it can be advantageously used for investigations on constructional elements configured in many different ways, wherein a complex evaluation with regard to the strength of the respective construction elements and the materials used for the production is possible.
  • a long-term use of the invention on construction elements is also possible.
  • the invention can also be used in extreme examinations of construction elements, in which forces acting on the construction elements up to above the Breakage limit can occur.
  • strain gauges and deformations on construction elements with strain gauges are recorded and evaluated. Strain gauges are able to detect especially low-frequency Mess ⁇ signals with high accuracy.
  • acceleration sensors are also used on construction elements which can detect measurement signals in the frequency range, starting from approximately 10 Hz up to 10 kHz.
  • sound emission analyzes are carried out on construction elements, in which case measurement signals having further increased frequencies in the frequency band between approximately 20 kHz and 2 MHz must be recorded and evaluated as ultrasound in the form of structure-borne noise.
  • the designated sensors can detect measurement signals in the respective frequency ranges and correspondingly provide specific information about the respective state of a design element.
  • these different sensors would have to be used on a respective construction element, whereby separate detection and evaluation of the respective measurement signals of the different sensors must be carried out.
  • the time reference of measured signals recorded with the different sensors and subsequently evaluated is likewise not possible without further ado, since the respective measuring signals in the case of the known solutions each have to be supplied to an electronic evaluation via separate measuring channels.
  • the cost factor for acoustic emission sensors and acceleration sensors has a negative effect and, as already mentioned, sound emission sensors and acceleration sensors have a corresponding increased volume and accordingly a larger mass, which can lead to erroneous detection of measurement signals.
  • the sensor arrangement according to the invention is designed such that at least one piezo fiber sensor and strain gauges are fi xed on a common carrier. Both piezo fiber sensor and strain gauges are connected to a common electronic evaluation unit.
  • the carrier can be firmly, but preferably detachably, attached to the respective constructional element.
  • the support is designed in the form of a flexible film which, due to its flexibility, can be adapted to different surface contours of construction elements and thus full-surface attachment of such a support, at least for the surface regions where the piezo fiber sensor and Strain gauges are connected to the carrier is possible.
  • the attachment of the carrier can preferably be carried out in a substance-tight manner, for which purpose a suitable adhesion promoter can be used in particular.
  • a surface of such a flexible carrier is then coated with the adhesion promoter so that the adhesion promoter realizes the material-locking connection of the carrier with the piezo fiber sensor and strain gauges.
  • Piezo fiber sensor and strain gauges can be connected to the electronic evaluation unit via thin strip conductors, which are likewise arranged on the surface of the carrier and connected thereto.
  • the printed conductors can be printed or wet-chemically produced, as in the case of conventional printed circuit boards, and the detected measurement signals fed to at least one semiconductor component which can fulfill the function of the electronic evaluation unit.
  • a time-related detection and subsequent evaluation of the different measurement signals should also be carried out.
  • the measurement signals acquired simultaneously with the different sensors, namely the piezo fiber sensor and the strain gauges should also be evaluated with corresponding time-resolved resolution.
  • a corresponding assignment of the different measuring signals can then take place, so that with knowledge of the load acting on the constructional element at the respective time, a corresponding reference to this load can also be produced.
  • the corresponding measuring signals can also be compressed and subsequently transmitted to an electronic data processing system in compressed form.
  • piezo-fiber sensors can also damage such as e.g. Cracks or breaks in construction elements can be detected, since they can be detected via structure-borne sound waves and optionally also localized.
  • Sensors can almost be limited to a single one Position, so that compared to known Lösun ⁇ conditions an improved location reference can be achieved.
  • Figure 1 in schematic form an example of a inventive sensor arrangement.
  • an electronic evaluation unit 4 has been glued on a thin plastic film with a thickness of ⁇ 1 mm. Be about connecting lines
  • strain gauges 3 and the fibers of the piezo fiber sensor 2 may coincide or deviate from one another.
  • At the electronic evaluation unit 4 is a standardized interface for a possible Koch ⁇ transmission of measurement signals of the piezo fiber sensor 2 and the strain gauges 3, which may have already been preprocessed and compressed in the electronic evaluation unit 4, provided to an electronic data processing system not shown here dar ⁇ .

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

L'invention concerne un ensemble capteur pour détecter une influence exercée par des charges statiques et dynamiques sur des éléments de construction. Cet ensemble peut être utilisé de manière avantageuse sur des éléments de construction de conception totalement différente et pour des investigations qui permettent une évaluation complexe de sa solidité et des matériaux utilisés lors de la fabrication. L'invention vise à saisir l'influence de telles charges avec une plus grande précision et de l'analyser à moindres coûts. A cet effet, l'ensemble capteur est conçu de manière qu'au moins un capteur piézo à fibres (2) et un extensomètre à résistance (3) sont fixés sur un support (1) commun pouvant être monté sur un élément de construction, le capteur piézo à fibres et l'extensomètre à résistance étant en outre raccordés à une unité d'évaluation (4) électronique.
PCT/DE2005/001457 2004-09-01 2005-08-18 Ensemble capteur et procede pour detecter une influence exercee par des charges statiques et dynamiques sur des elements de construction WO2006024263A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410043181 DE102004043181B3 (de) 2004-09-01 2004-09-01 Sensoranordnung und Verfahren zur Detektion des Einflusses von auf Konstruktionselementen wirkenden statischen und dynamischen Belastungen
DE102004043181.7 2004-09-01

Publications (1)

Publication Number Publication Date
WO2006024263A1 true WO2006024263A1 (fr) 2006-03-09

Family

ID=35285453

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2005/001457 WO2006024263A1 (fr) 2004-09-01 2005-08-18 Ensemble capteur et procede pour detecter une influence exercee par des charges statiques et dynamiques sur des elements de construction

Country Status (2)

Country Link
DE (1) DE102004043181B3 (fr)
WO (1) WO2006024263A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015012981A1 (fr) * 2013-07-22 2015-01-29 Illinois Tool Works Inc. Interface sous forme de circuit souple pour extensomètres

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ309017B6 (cs) * 2020-06-30 2021-11-24 ŠKODA AUTO a.s Způsob a zařízení pro měření svislého zatížení a tažné zařízení

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609624A (en) * 1969-02-20 1971-09-28 Vishay Intertechnology Inc Strain gage and method of bonding the gage to a member under test
EP0526855A1 (fr) * 1991-07-31 1993-02-10 Hughes Aircraft Company Circuit adapté pour la surveillance de l'évaluation de l'état d'une structure
US5379644A (en) * 1991-08-15 1995-01-10 Shimizu Costruction Co., Ltd. Strain or stress gauge and method for detecting strain or stress of structure using the same, and plastic composite material for foreknowing progress of breakdown of structure and method using the same
US20020028034A1 (en) * 2000-07-27 2002-03-07 Chen Peter C. Fiber optic strain sensor
FR2836548A1 (fr) * 2002-02-22 2003-08-29 Air Liquide Structure composite comprenant des moyens de detection de phenomenes physique, et utilisation d'une fibre de materiau composite pour realiser une telle detection
DE10228419B3 (de) * 2002-06-25 2004-03-25 F. S. Fehrer Automotive Foam Gmbh Fahrzeugsitz mit Sensor zu Sitzbelegungserkennung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639498A (en) * 1967-06-22 1972-02-01 Midland Silicones Ltd Preparation of crosslinked organopolysiloxanes in a suspension medium
DE29922560U1 (de) * 1999-12-22 2000-03-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 80636 München Vorrichtung zur flächigen Messung von Betriebszustandsgrößen bei Maschinenkomponenten
DE10214984B4 (de) * 2002-04-04 2006-01-19 Eads Deutschland Gmbh Aktorik- und Sensoriksystem für Verbundstrukturen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609624A (en) * 1969-02-20 1971-09-28 Vishay Intertechnology Inc Strain gage and method of bonding the gage to a member under test
EP0526855A1 (fr) * 1991-07-31 1993-02-10 Hughes Aircraft Company Circuit adapté pour la surveillance de l'évaluation de l'état d'une structure
US5379644A (en) * 1991-08-15 1995-01-10 Shimizu Costruction Co., Ltd. Strain or stress gauge and method for detecting strain or stress of structure using the same, and plastic composite material for foreknowing progress of breakdown of structure and method using the same
US20020028034A1 (en) * 2000-07-27 2002-03-07 Chen Peter C. Fiber optic strain sensor
FR2836548A1 (fr) * 2002-02-22 2003-08-29 Air Liquide Structure composite comprenant des moyens de detection de phenomenes physique, et utilisation d'une fibre de materiau composite pour realiser une telle detection
DE10228419B3 (de) * 2002-06-25 2004-03-25 F. S. Fehrer Automotive Foam Gmbh Fahrzeugsitz mit Sensor zu Sitzbelegungserkennung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015012981A1 (fr) * 2013-07-22 2015-01-29 Illinois Tool Works Inc. Interface sous forme de circuit souple pour extensomètres

Also Published As

Publication number Publication date
DE102004043181B3 (de) 2006-06-01

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