DE10308419A1 - Dimensionally stable mounting for a measurement element, especially a carbon fiber rod used as a standard measurement length, has mounting partners of different thermal expansion rates whose expansions compensate each other - Google Patents
Dimensionally stable mounting for a measurement element, especially a carbon fiber rod used as a standard measurement length, has mounting partners of different thermal expansion rates whose expansions compensate each other Download PDFInfo
- Publication number
- DE10308419A1 DE10308419A1 DE2003108419 DE10308419A DE10308419A1 DE 10308419 A1 DE10308419 A1 DE 10308419A1 DE 2003108419 DE2003108419 DE 2003108419 DE 10308419 A DE10308419 A DE 10308419A DE 10308419 A1 DE10308419 A1 DE 10308419A1
- Authority
- DE
- Germany
- Prior art keywords
- dimensionally stable
- sleeve
- partners
- rod
- elements according
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B1/00—Measuring instruments characterised by the selection of material therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/30—Bars, blocks, or strips in which the distance between a pair of faces is fixed, although it may be preadjustable, e.g. end measure, feeler strip
- G01B3/32—Holders therefor
Abstract
Description
Einleitung und Stand der Technik:Introduction and status of Technology:
In der Messtechnik werden Messnormale verwendet, deren Abmessungen sich in Abhängigkeit von der Temperatur möglichst nicht oder nur sehr wenig verändern sollen. Besonders interessant sind Messstäbe, deren Längen konstant bleiben. Die genaue Ermittlung der Stablängen erfolgt über Messelemente, die sich am Stabende befinden.Measurement standards are used in measurement technology, whose dimensions vary depending on the temperature if possible don't change or change very little should. Measuring rods whose lengths remain constant are particularly interesting. The exact determination of the rod lengths takes place via Measuring elements located at the end of the bar.
Stand der Technik ist es, Präzisionskugeln aus Stahl zu verwenden und sie in kalibrierten, metallischen Kugelpfannenringen aufzunehmen, die an den Enden von Stäben eingelassen sind. In der Mitte des Kugelpfannenrings befindet sich jeweils ein Magnet, der die Kugel in den Pfannenring zieht.State of the art is to make precision balls Use steel and place it in calibrated, metallic ball cup rings which are embedded at the ends of rods. In the In the middle of the ball socket ring there is a magnet that the ball pulls into the pan ring.
Es ist ebenfalls bekannt, Messstäbe aus carbonfaserverstärktem Kunststoff (CFK) zu verwenden, da diese eine sehr geringe thermischen Ausdehnung besitzen.It is also known to use measuring rods made of carbon fiber reinforced plastic (CFRP) to be used because they have a very low thermal expansion have.
Aus solchen CFK-Messstäben – versehen mit Präzisionsstahlkugeln – lassen sich auch räumliche Maßkörper erstellen, mit deren Hilfe beispielsweise Messwerkzeuge in allen drei Koordinaten überprüft werden können.From such CFRP measuring rods - provided with Precision steel balls - let themselves spatial Create measuring bodies, with the help of which, for example, measuring tools can be checked in all three coordinates can.
Die einfachsten zusammensetzbaren, räumlichen Strukturen sind Tetraeder aus sechs Einzelstäben. Die in den CFK-Stab eingeklebten Metallelemente wie auch insbesondere die außenliegenden Stahlkugeln liefern jedoch unter Temperatureinwirkung eine zu große Längenänderung der einzelnen Stäbe und führen damit zu nicht vernachlässigbaren Formänderungen und Ungenauigkeiten der gesamten räumlichen Struktur.The simplest composable spatial Structures are tetrahedra made from six individual bars. The ones glued into the CFRP rod Deliver metal elements as well as in particular the external steel balls however, under the influence of temperature an excessive change in length of the individual rods and lead to non-negligible changes in shape and inaccuracies in the overall spatial structure.
Lösung des ProblemsSolution of problem
Eine Lösung des technischen Problems besteht darin, die thermische Ausdehnung aller an einem Längenmessstab beteiligten Komponenten durch eine Kopplung von Materialien mit unterschiedlichen thermischen Ausdehnungen zu kompensieren.A solution to the technical problem consists of the thermal expansion of all on a length measuring stick involved components by coupling materials with to compensate for different thermal expansions.
In das Stabende ist eine Hülse (
Hülse
(
Funktionsweise der Temperaturkompensationfunctionality temperature compensation
Wird beispielsweise die Umgebungstemperatur
erhöht,
dehnt sich der Messwürfel
(
Im Fall der Verlängerung der Hülse (Temperaturerhöhung) nimmt
die axiale Verschiebung der Einklebmutter (
Durch eine entsprechende Wahl der
Materialpaarung (in Bezug auf thermische Ausdehnung) von Hülse (
Ein radiales Spiel zwischen den einzelnen Komponenten
der Halterung hat nur einen geringen Einfluss auf die Längenkonstanz
des Stabes. Um dennoch einerseits ein Spiel zwischen der Hülse (
1. Ausführungsbeispiel1st embodiment
In
AL-Hülse (
Durch Temperatureinwirkung ändert sich aufgrund
der Thermaldehnung der Al-Hülse
(
Das Problem der zentrischen und nicht
klemmende Lagerung der einzelnen Komponenten wird im Ausführungsbeispiel
dadurch gelöst,
dass die Al-Hülse
(
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003108419 DE10308419A1 (en) | 2003-02-27 | 2003-02-27 | Dimensionally stable mounting for a measurement element, especially a carbon fiber rod used as a standard measurement length, has mounting partners of different thermal expansion rates whose expansions compensate each other |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003108419 DE10308419A1 (en) | 2003-02-27 | 2003-02-27 | Dimensionally stable mounting for a measurement element, especially a carbon fiber rod used as a standard measurement length, has mounting partners of different thermal expansion rates whose expansions compensate each other |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10308419A1 true DE10308419A1 (en) | 2004-09-09 |
Family
ID=32841947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003108419 Withdrawn DE10308419A1 (en) | 2003-02-27 | 2003-02-27 | Dimensionally stable mounting for a measurement element, especially a carbon fiber rod used as a standard measurement length, has mounting partners of different thermal expansion rates whose expansions compensate each other |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10308419A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006026264A1 (en) * | 2006-06-02 | 2009-04-02 | Benteler Automobiltechnik Gmbh | Measuring instrument e.g. camera, for photogrammetric measurement of objects, has receivers arranged in sensor carrier at distance to each other on connecting axis, where carrier is made of carbon-fiber-reinforced plastic |
DE102008061648A1 (en) * | 2008-12-12 | 2010-06-17 | Rolls-Royce Deutschland Ltd & Co Kg | Sensor holder for at least one sensor on a gas turbine |
WO2015039639A1 (en) * | 2013-09-21 | 2015-03-26 | Engtrade Gmbh | Measuring apparatus for measuring the diameter and the roundness of spherical objects, in particular of golf balls |
-
2003
- 2003-02-27 DE DE2003108419 patent/DE10308419A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006026264A1 (en) * | 2006-06-02 | 2009-04-02 | Benteler Automobiltechnik Gmbh | Measuring instrument e.g. camera, for photogrammetric measurement of objects, has receivers arranged in sensor carrier at distance to each other on connecting axis, where carrier is made of carbon-fiber-reinforced plastic |
DE102006026264B4 (en) * | 2006-06-02 | 2009-12-10 | Benteler Automobiltechnik Gmbh | Measuring arrangement and use of the measuring arrangement |
DE102008061648A1 (en) * | 2008-12-12 | 2010-06-17 | Rolls-Royce Deutschland Ltd & Co Kg | Sensor holder for at least one sensor on a gas turbine |
WO2015039639A1 (en) * | 2013-09-21 | 2015-03-26 | Engtrade Gmbh | Measuring apparatus for measuring the diameter and the roundness of spherical objects, in particular of golf balls |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee | ||
8170 | Reinstatement of the former position | ||
8110 | Request for examination paragraph 44 | ||
R016 | Response to examination communication | ||
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |