EP0638876A1 - Verfahren und Vorrichtung zur Kontrolle einer beweglichen Maschine - Google Patents

Verfahren und Vorrichtung zur Kontrolle einer beweglichen Maschine Download PDF

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Publication number
EP0638876A1
EP0638876A1 EP94490037A EP94490037A EP0638876A1 EP 0638876 A1 EP0638876 A1 EP 0638876A1 EP 94490037 A EP94490037 A EP 94490037A EP 94490037 A EP94490037 A EP 94490037A EP 0638876 A1 EP0638876 A1 EP 0638876A1
Authority
EP
European Patent Office
Prior art keywords
parameters
mobile machine
measurements
correlation
deformations
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.)
Granted
Application number
EP94490037A
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English (en)
French (fr)
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EP0638876B1 (de
Inventor
Roger Boinet
Philippe Popieul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AINF SA
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AINF SA
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Publication date
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00—Safety gear
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles

Definitions

  • the present invention relates to a method of controlling a mobile machine, such as in particular an overhead crane, and a device for its implementation which will find its application in all sectors of economic activity in which one must to use such machines.
  • overhead traveling cranes consist of a frame comprising box springs connected by at least one beam, capable of being moved in a translational movement along lines formed by rails which delimit a raceway, and which support a carriage, able to be moved in a directional movement, on which lifting means are arranged.
  • the object of the present invention is to remedy these drawbacks by providing a method of controlling a mobile machine, such as in particular an overhead crane which makes it possible to determine with precision the state of said bridge and thus to avoid the risks of malfunction.
  • Another advantage of the method for controlling a mobile machine lies in the fact that it is simple to implement and that it makes it possible to obtain good results whatever the conditions of use.
  • Another advantage of the control method of a mobile machine according to the invention lies in the fact that it can be used to determine the state of a mobile machine regardless of its nature and its own characteristics, which increases it. its capacity for use.
  • An advantage of the device for the implementation of the control method according to the invention lies in the fact that it consists mainly of removable means which allows its use on many sites of use.
  • the subject of the present invention is a method for controlling a mobile machine, such as in particular an overhead crane, and a device for its implementation which will find its application in all sectors of industrial activity in which it is necessary to have recourse to such mobile machines for lifting and moving loads.
  • an overhead crane 1 which has two rows 2 and 3 each consisting of a guide rail having a suitable shape and which defines a raceway. On these raceways are mounted movable in translation by means of the rollers 6, motors or carriers, in a direction parallel to Ox in the direction of the arrow F1, a frame 20 consisting of two box springs 4 and 5 connected by beams 8 and 9.
  • each bed 4 and 5 comprises a motor roller 6 and a carrier roller 6.
  • a motor 7 is arranged on each of them and it has power characteristics adapted according to needs so as to ensure a desired operation of the overhead crane.
  • These motors 7 also include control means that can be actuated by means of appropriate means as well as brakes associated with an end of stroke.
  • the two beams 8 and 9 define guide rails for a carriage 10 formed by an assembly of side members 10a and crossbeams 10b.
  • This carriage 10 is, moreover, mounted mobile on these beams 8 and 9 in translation in a directional movement in the direction of the arrow F2 parallel to the axis oy by means of rollers 11 motors and carriers associated with motors 12 having characteristics of appropriate power.
  • This carriage 10 also includes lifting means 13, of conventional and known type, such as for example a hook or any other equivalent means adapted to the load which it is desired to lift and transport, which are mounted movable in the direction of the arrow F3 parallel to the axis Oz.
  • lifting means 13 of conventional and known type, such as for example a hook or any other equivalent means adapted to the load which it is desired to lift and transport, which are mounted movable in the direction of the arrow F3 parallel to the axis Oz.
  • this bridge 1 is equipped with means 14 for measuring characteristic parameters of the mobile machine giving the image of the forces, deformations and of the energy consumed at a given instant. More precisely, these means 14 measure the stresses in the bed bases 4, 5, the deformations in a horizontal and vertical plane of the angle between the beam 8, 9 and the bed bases 4, 5 and the intensity of the drive motors 7 box springs 4 and 5.
  • this device comprises strain gauges 15, of a conventional and known type, for determining the variations in the stresses which are exerted at the level of the bed bases 4 and 5.
  • each of the bed bases 4 and 5 is arranged on each of the bed bases 4 and 5 at determined locations and are intended to be used with a laser, of a conventional and known type emitting light radiation in an appropriate frequency range.
  • amperometric clamps 17 are associated with each of these.
  • the device according to the invention comprises also means for processing 18 these measurements constituted by a recorder, such as for example that marketed under the name "Windograf", associated with data processing means comprising at least one memory associated with computer means connected to display means and information management such as for example a keyboard and a console.
  • a recorder such as for example that marketed under the name "Windograf”
  • data processing means comprising at least one memory associated with computer means connected to display means and information management such as for example a keyboard and a console.
  • these means 18 for processing information operate according to a flow chart adapted to allow rapid and reliable processing of said information, and in particular a correlation and a comparison of the measurements of the various parameters.
  • this control method consists in determining the specific characteristics of the bridge by measuring parameters, such as in particular the stresses in a bed base, the horizontal and vertical deformations of the angle between the bed bases 4, 5 and the beams 8, 9 as well as the intensity of each motor 7 for driving the bed bases 4 and 5.
  • parameters such as in particular the stresses in a bed base, the horizontal and vertical deformations of the angle between the bed bases 4, 5 and the beams 8, 9 as well as the intensity of each motor 7 for driving the bed bases 4 and 5.
  • a "signature" of the bridge is determined in a way making it possible to know these characteristics before it is put into operation or after a certain number of hours of use.
  • the same measurement is made of at least the same parameters, on the bridge when the latter is in the active phase, and a correlation and comparison of the result of these measurements is established with the established values incorporating the characteristics. clean the bridge to determine its condition.
  • this bridge has faults resulting from improper use, and which are likely to generate a stop in its operation, which increases safety in use.
  • the values in the active phase are acquired during the accelerations and decelerations of the overhead crane when the crane supports specific loads, which makes it possible in particular to check whether its start-up takes place in good conditions.
  • a certain amount of information and data concerning these parameters is also stored in order to be able to follow the revolutions over time according to a determined sequence and thus to predict, the possible faults likely to occur in terms of operation. of the overhead crane.
  • FIG. 2 illustrates the variations in the difference in current consumption of the motors 7 of each queue 2 and 3.
  • FIG. 3 illustrates the variations ⁇ x in the horizontal plane of the angle formed between the beams 8 and 9 and the box springs 4 and 5. It is observed, on this curve, for an event To corresponding to a difference in current consumption , an advance ⁇ tx of the deformation of the angle in the horizontal plane with respect to the variation of the difference in current consumption between the motors 7 of each row 2 and 3.
  • FIG. 4 which represents the variation of the deformation in a vertical plane of the angle between the beams 8 and 9 and the box springs 4 and 5, there is a delay ⁇ tz of this deformation of the angle by compared to the variation ⁇ to of the difference in current consumption between the motors 7 of each queue 2 and 3.
  • the flowchart of the invention selects the event points on each of these three curves and memorizes for each event the variations ⁇ i, ⁇ I, ⁇ z ⁇ tx and ⁇ tz and makes a correlation of these events.
  • the processing means of the invention make it possible to determine a diagnosis on the evolution of the events likely to occur over time, in particular by a correlation of these measurements.
  • FIG. 5 shows the variation ⁇ I of the difference in current consumption of the motors 7 between the lines 2 and 3.
  • the difference in consumption ⁇ I of the motors 7 between the queues 2 and 3 has a curve such as that which is more particularly illustrated in FIG. 7, and if on the other hand ⁇ x is different from zero and ⁇ z equals zero, this corresponds to a flatness defect between the rails of each row 2 and 3.
  • the processing means according to the invention also make it possible to obtain an estimate parameters and in particular, when the variations ⁇ z ⁇ y corresponding to the variations of the stresses are determined, since this makes it possible to appreciate the solidity of the bed bases 4 and 5 as well as their resistance to fatigue with regard to the frequency of variation of these stresses.
  • the processing means make it possible, by calculation, to determine the forces exerted which, when they are reduced to the overall structure of the bridge, make it possible to calculate the variations of the mechanical horizontal moments likely to occur in the entire structure and therefore, to determine the corresponding stress level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control And Safety Of Cranes (AREA)
EP19940490037 1993-08-06 1994-08-02 Verfahren und Vorrichtung zur Kontrolle einer beweglichen Maschine Expired - Lifetime EP0638876B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9309875A FR2708770B1 (fr) 1993-08-06 1993-08-06 Procédé de contrôle d'une machine mobile et dispositif pour sa mise en Óoeuvre.
FR9309875 1993-08-06

Publications (2)

Publication Number Publication Date
EP0638876A1 true EP0638876A1 (de) 1995-02-15
EP0638876B1 EP0638876B1 (de) 1998-11-11

Family

ID=9450126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940490037 Expired - Lifetime EP0638876B1 (de) 1993-08-06 1994-08-02 Verfahren und Vorrichtung zur Kontrolle einer beweglichen Maschine

Country Status (3)

Country Link
EP (1) EP0638876B1 (de)
DE (1) DE69414489T2 (de)
FR (1) FR2708770B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2123589A1 (de) * 2008-05-19 2009-11-25 Manitowoc Crane Group France SAS Bestimmung und Rekonstruktion von Laständerungen an Hebezeugen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2020432A (en) * 1978-05-06 1979-11-14 Arcubos Ltd Improvements in or relating to strain detecting devices
GB2090416A (en) * 1980-12-24 1982-07-07 Mannesmann Ag Apparatus for indicating the wear of a lifting device such as a hoist
EP0080679A2 (de) * 1981-11-30 1983-06-08 Westinghouse Electric Corporation Vorrichtung zum Entfernen und/oder Einsetzen von Brennstoffelementen eines Kernreaktors
US4636962A (en) * 1983-05-24 1987-01-13 Columbus Mckinnon Corporation Microprocessor-controlled hoist system
FR2663473A1 (fr) * 1990-06-19 1991-12-20 Systemes Productiques Ingenier Dispositif et procede de limitation de charge pour appareil mecanique ou similaire, utilisant au moins un organe moteur de type electrique.
US5133465A (en) * 1990-01-29 1992-07-28 Whiting Corporation Bridge crane electric motor control system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2020432A (en) * 1978-05-06 1979-11-14 Arcubos Ltd Improvements in or relating to strain detecting devices
GB2090416A (en) * 1980-12-24 1982-07-07 Mannesmann Ag Apparatus for indicating the wear of a lifting device such as a hoist
EP0080679A2 (de) * 1981-11-30 1983-06-08 Westinghouse Electric Corporation Vorrichtung zum Entfernen und/oder Einsetzen von Brennstoffelementen eines Kernreaktors
US4636962A (en) * 1983-05-24 1987-01-13 Columbus Mckinnon Corporation Microprocessor-controlled hoist system
US5133465A (en) * 1990-01-29 1992-07-28 Whiting Corporation Bridge crane electric motor control system
FR2663473A1 (fr) * 1990-06-19 1991-12-20 Systemes Productiques Ingenier Dispositif et procede de limitation de charge pour appareil mecanique ou similaire, utilisant au moins un organe moteur de type electrique.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FUJIYOSHI: "Monitoring of load cycle of overhead traveling cranes", ADVANCES IN INSTRUMENTATION, vol. 26, no. 2, 4 October 1971 (1971-10-04), RESEARCH TRIANGLE PARK US, pages 648-1 - 648-8 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2123589A1 (de) * 2008-05-19 2009-11-25 Manitowoc Crane Group France SAS Bestimmung und Rekonstruktion von Laständerungen an Hebezeugen
US8200401B2 (en) 2008-05-19 2012-06-12 Manitowoc Crane Group France Sas Determining and reconstructing changes in load on lifting gear
CN101585485B (zh) * 2008-05-19 2013-05-29 马尼托沃克起重机集团（法国）公司 确定和重建提升齿轮上的载荷变化

Also Published As

Publication number Publication date
FR2708770A1 (fr) 1995-02-10
FR2708770B1 (fr) 1995-10-13
DE69414489T2 (de) 1999-06-10
DE69414489D1 (de) 1998-12-17
EP0638876B1 (de) 1998-11-11

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