DE4103765A1 - Strain transducer for large cranes or shipping - has strain gauges on plates in centre of measurement body and protected by sealed chambers - Google Patents
Strain transducer for large cranes or shipping - has strain gauges on plates in centre of measurement body and protected by sealed chambersInfo
- Publication number
- DE4103765A1 DE4103765A1 DE19914103765 DE4103765A DE4103765A1 DE 4103765 A1 DE4103765 A1 DE 4103765A1 DE 19914103765 DE19914103765 DE 19914103765 DE 4103765 A DE4103765 A DE 4103765A DE 4103765 A1 DE4103765 A1 DE 4103765A1
- Authority
- DE
- Germany
- Prior art keywords
- strain
- strain gauges
- plates
- protected
- tensile force
- 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- Withdrawn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
- 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
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/101—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors inserted into the flexible member
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Zweck der Erfindung ist eine zuverlässige Messeinrichtung für den groben Kran- und Schiffsbetrieb, auch unter Wasser, bis zu einer Größenordnung von einigen hundert Tonnen sicher zu betreiben.The purpose of the invention is a reliable measuring device for the coarse crane and ship operations, even under water, up to an order of magnitude to operate a hundred tons safely.
Bekannt sind ähnliche Geräte und Form von sogenannten Zuglaschen, die eine zentrale durchgehende Bohrung besitzen, welche an der schwächsten Stelle der Bohrungswandung mit DMS beklebt sind und zwei, durch eine zentrale Schraube mit einander verbundene Abdeckteile, die durch zwei O-Ringe abgedichtet sind, diese werden aber mit der Zeit undicht. Die Anbringung der DMS erfolgte auf dem inneren Radius der Bohrung an der dünnsten Stelle.Similar devices and form of so-called pull tabs are known, the one have central through hole, which at the weakest point of the Bore walls are covered with strain gauges and two with a central screw interconnected cover parts, which are sealed by two O-rings, these become leaky over time. The DMS was attached to the inner radius of the hole at the thinnest point.
Vorliegende Erfindung ist frei von diesen Mängeln und arbeitet zuverlässig, weil an Stelle der O-Ring-Abdichtung die beiderseitigen Verschlußteile 1 u. 2 der Meßeinrichtung dicht verschweißt sind.The present invention is free from these shortcomings and works reliably because, instead of the O-ring seal, the closure parts 1 and 2 on both sides. 2 of the measuring device are tightly welded.
Eins der Verschlußteile 2 ist als Kabelanschluß ausgebildet, beide 1 u. 2 bie ten Platz für einen oder mehrere Verstärker, nicht dargestellt z. B. als Ersatz für einen Ausfall, oder Temperaturaufnehmer, Heizung, Regelung, Schleppnetz überwachung bei Kränen, a. ä.One of the closure parts 2 is designed as a cable connection, both 1 u. 2 bie th space for one or more amplifiers, not shown z. B. as a replacement for a failure, or temperature sensor, heating, control, trawl monitoring in cranes, a. Ä.
Der meßempfindliche Teil ist eine ebene Platte 3, die auch die DMS trägt und die Meßlasche 5 in zwei Kammern trennt, so daß bei einem Kabel schaden eine Ver stärkerschaltung nicht beschädigt wird, z. B. durch eindringendes Wasser. Bei großen Zugkräften sind die DMS 4 auf dicke Querschnitte 6 der Meßlasche 5 geklebt.The measurement-sensitive part is a flat plate 3 , which also carries the strain gauges and separates the measuring tab 5 in two chambers, so that damage to a cable is not damaged a Ver amplifier circuit, z. B. by penetrating water. With large tensile forces, the strain gauges 4 are glued to thick cross sections 6 of the measuring tab 5 .
In einer der Kammern ist ein Druckaufnehmer 7 für die Messung der Wassertiefe eingebaut oder ein Mikrophon. Die Löcher 8 dienen zur Aufnahme von Bolzen eines Lastgestänges. A pressure transducer 7 for measuring the water depth or a microphone is installed in one of the chambers. The holes 8 serve to receive bolts of a load linkage.
In der Darstellung Abb. 1 und 2 bedeutet 1 die Aufsicht und 2 den Querschnitt der Zugkraftmeßlasche in der Folge nur Zuglasche genannt. Abb. 5 und 6 sind größer dargestellt. In der Aufsicht ist der schräg angelegte Kabelanschuß sichtbar, der in senkrechter oder waagrechter Einbaulage der Zuglasche die ge ringste Kabelbiegung ergibt, ca. 45°. Die beiden Löcher am Ende dienen der Aufnahme im Lastgestänge oder Seilen, z. B. von Kranen.In the illustration in Figs. 1 and 2, 1 means the top view and 2 the cross section of the tensile force measuring strap, hereinafter referred to as the pulling strap. Fig. 5 and 6 are shown larger. In the top view, the diagonally applied cable connection is visible, which in the vertical or horizontal installation position of the pull tab results in the lowest ring bend, approx. 45 °. The two holes at the end serve to accommodate the load linkage or ropes, e.g. B. of cranes.
Das wesentliche Bauteil der Meßlasche ist die aus einem Stück mit dem Grund körper symmetrisch gefertigte Meßplatte, die vorzugsweise mit DMS beklebt wird und absolute Linearität besitzt, auch ins überlastgebiet hinein.The essential component of the measuring strap is the one piece with the bottom Body symmetrically manufactured measuring plate, which is preferably glued with strain gauges and has absolute linearity, even into the overload area.
Eine oder mehrere Kammern Abb. 5 dienen der Aufnahme von ekektron. Bauteilen, wie z. B. Kompensation der Systemschwingungen, Verstärkung, Warnung, Abschal tung bei Gefahr. Anstelle von Gummidichtungen werden Dichtschweißungen aller Außenteile angewendet, um auch im Tiefseebereich zuverlässig zu arbeiten. Der Raum hinter der Abdeckung dient der Aufnahme einer Vergußmasse um bei Kabelschäden das Eindringen von Wasser in den Meßraum zu verhindern.One or more chambers Fig. 5 are used to hold ekektron. Components such as B. Compensation of system vibrations, amplification, warning, shutdown in case of danger. Instead of rubber seals, all external parts are welded in order to work reliably even in the deep sea. The space behind the cover is used to hold a potting compound in order to prevent water from entering the measuring chamber if the cable is damaged.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914103765 DE4103765A1 (en) | 1991-02-08 | 1991-02-08 | Strain transducer for large cranes or shipping - has strain gauges on plates in centre of measurement body and protected by sealed chambers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914103765 DE4103765A1 (en) | 1991-02-08 | 1991-02-08 | Strain transducer for large cranes or shipping - has strain gauges on plates in centre of measurement body and protected by sealed chambers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4103765A1 true DE4103765A1 (en) | 1992-08-13 |
Family
ID=6424598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19914103765 Withdrawn DE4103765A1 (en) | 1991-02-08 | 1991-02-08 | Strain transducer for large cranes or shipping - has strain gauges on plates in centre of measurement body and protected by sealed chambers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4103765A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1688727A1 (en) | 2005-02-05 | 2006-08-09 | Bosch Rexroth Aktiengesellschaft | Force measuring device and elongation measuring element |
WO2008061763A2 (en) * | 2006-11-22 | 2008-05-29 | Brosa Ag | Torsion-resistant force inducer comprising a plate in the central opening |
WO2008068391A1 (en) * | 2006-12-07 | 2008-06-12 | Tractel S.A.S. | Electronic dynamometer |
DE102014007376A1 (en) | 2014-05-21 | 2015-12-17 | Tecsis Gmbh | Measuring element for measuring forces |
-
1991
- 1991-02-08 DE DE19914103765 patent/DE4103765A1/en not_active Withdrawn
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1688727A1 (en) | 2005-02-05 | 2006-08-09 | Bosch Rexroth Aktiengesellschaft | Force measuring device and elongation measuring element |
US7357036B2 (en) | 2005-02-05 | 2008-04-15 | Bosch Rexroth Ag | Force measuring apparatus and strain measuring element |
WO2008061763A2 (en) * | 2006-11-22 | 2008-05-29 | Brosa Ag | Torsion-resistant force inducer comprising a plate in the central opening |
DE102006057258A1 (en) * | 2006-11-22 | 2008-05-29 | Brosa Ag | Torsionsunanfälliger load cell with bar in central opening |
WO2008061763A3 (en) * | 2006-11-22 | 2008-09-18 | Brosa Ag | Torsion-resistant force inducer comprising a plate in the central opening |
DE102006057258B4 (en) * | 2006-11-22 | 2010-04-08 | Brosa Ag | Torsionsunanfälliger load cell with bar in central opening |
WO2008068391A1 (en) * | 2006-12-07 | 2008-06-12 | Tractel S.A.S. | Electronic dynamometer |
DE102014007376A1 (en) | 2014-05-21 | 2015-12-17 | Tecsis Gmbh | Measuring element for measuring forces |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |