EP3626674B1 - Dispositif, kit et procédé pour blindage électro-magnétique d'une télécommande d'une grue - Google Patents

Dispositif, kit et procédé pour blindage électro-magnétique d'une télécommande d'une grue Download PDF

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Publication number
EP3626674B1
EP3626674B1 EP19181226.2A EP19181226A EP3626674B1 EP 3626674 B1 EP3626674 B1 EP 3626674B1 EP 19181226 A EP19181226 A EP 19181226A EP 3626674 B1 EP3626674 B1 EP 3626674B1
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EP
European Patent Office
Prior art keywords
crane
remote command
container
command device
control unit
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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.)
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EP19181226.2A
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German (de)
English (en)
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EP3626674A1 (fr
Inventor
Rossano Ceresoli
Valentino Birolini
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FASSI GRU SpA
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FASSI GRU SpA
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Priority to PL19181226T priority Critical patent/PL3626674T3/pl
Publication of EP3626674A1 publication Critical patent/EP3626674A1/fr
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Publication of EP3626674B1 publication Critical patent/EP3626674B1/fr
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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
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/40—Applications of devices for transmitting control pulses; Applications of remote control devices

Definitions

  • the present invention refers to the technical field of remotely commanding a crane, such as loading cranes.
  • the modern cranes have a plurality of degrees of freedom, particularly a plurality of motions which are performed by an extendable arm or components thereof. Such motions are usually commanded by an operator through a remote command device, which can be by-wire or wirelessly connected to the crane, typically by radio waves.
  • the remote command device typically comprises a plurality of levers actuatable by the operator, to each of them a specific motion and direction thereof of the crane for example correspond, and one or more pushbuttons having particular functions, for example the emergency stop.
  • DE 20 2010 007057 U1 discloses a device for shielding a remote command device of a crane comprising a command panel having one or more levers and/or one or more pushbuttons and/or one or more knobs for managing the operations of the crane/ and a transmission unit configured for a by-wire and/or wireless communication with a control unit of the crane, said shielding device comprising a container adapted to internally receive the remote command device of the crane, wherein said container comprises one or more openings for gaining access to said one or more levers and/or one or more pushbuttons and/or one or more knobs of the remote command device of the crane from the outside of the container.
  • the remote command device in order to prevent undesired interferences in the surrounding environment, for example interferences with other machines present in the environment where the crane operates, and also to limit the electromagnetic interferences with the remote command device possibly generated by external devices.
  • the electromagnetic emissions of the command device do not comprise just the radio waves in case it wirelessly operates, but also emissions caused by the internal electric/electronic arrangement of the remote command device, present also when the remote command device is used in a by-wire mode.
  • the object of the present invention consists of providing a device, a kit, and a method of electromagnetically shielding a remote command device of a crane, without requiring to introduce substantial modifications to this latter.
  • a device for electromagnetically shielding a remote command device of the crane according to claim 1 by a kit for electromagnetically shielding a remote command device of the crane according to claim 10, and by a method of electromagnetically shielding a device for remotely commanding a crane according to claim 14.
  • a remote command device of a crane is generally indicated by reference 101.
  • the device 101 enables an operator to move the movable parts of a crane.
  • the available motions of a crane can comprise: rotating the column, raising and lowering the arms, extending and retracting the extensions, actuating the capstan, if this latter is provided.
  • Such motions are provided by corresponding actuators, usually of the hydraulic and/or electric type, associated to respective crane portions.
  • the crane comprises in turn a control unit 201 managing such motions.
  • the crane itself is provided with an on-site command device.
  • the device in order to communicate with the control unit 201 of the crane, comprises a dedicated transmission unit, which establishes a communication between the device 101 and the crane control unit 201.
  • the transmission unit can be configured so that the remote command device of the crane 101 could communicate by-wire or/and wirelessly with the crane control unit.
  • an outlet 105 to connect a cable 106 can be for example provided.
  • the transmission unit can for example comprise a radio transmission module, so that the device 101 could operate by a remote command, in other words could communicate with the crane control unit 201 by radio signals.
  • the radio connection module comprises an antenna, not shown in the figures, which can for example be housed inside the device 101 itself, adapted to communicate with a corresponding antenna 203 associated to the crane control unit.
  • the device 101 comprises a battery, still more preferably of the rechargeable type, so that it can be used also without power sources.
  • the device 1 can be directly connected to an electric power source and supplied by wire. If the by-wire communication is provided with the crane control unit 201, the wire 106 can act also as a power supply for the command device 101.
  • the remote command device of the crane 101 comprises a command panel 102 having, for example, levers and/or pushbuttons and/or knobs (for example a joystick) for managing the operations of the crane.
  • the command panel 102 can comprise, for example, pushbuttons 103, such as pushbuttons for turning on the device, alarm pushbuttons, audible signals emitting pushbuttons, default pushbuttons, etcetera.
  • the command panel 102 comprises a plurality of manual command members 104, each of them is responsible of a particular one of the above cited crane motions and the direction thereof.
  • the manual command members 104 can be for example shaped as forwardly actuatable (for a first motion direction) or backwardly actuatable (for a second motion direction, opposite to the first one) levers.
  • the crane remote command device 101 comprises a handle 19 which makes easier transporting it.
  • the handle 19 is shaped so that a user can gain access to the pushbuttons 103 and manual command members 104.
  • the device 101 During the operation, the device 101 generates electromagnetic waves mainly produced by its internal electric and electronic components. It is observed that such electromagnetic waves are produced also if the device 101 communicates with the crane control unit 201 by the wire 106, in other words without radio waves.
  • the term "internal electromagnetic waves” will be used for defining such waves and distinguishing them from the electromagnetic waves produced in the presence of a wireless communications of the transmission unit, and also from the external electromagnetic waves produced by further devices possibly present in the environment wherein the remote command device is placed.
  • the internal electromagnetic waves are shielded as much as possible, so that they do not propagate (or their propagation is limited) in the environment near the device 101.
  • desirably possible external electromagnetic waves should not interfere with the remote command device 101.
  • a device 1 for electromagnetically shielding the remote command device 101 is provided, particularly for shielding it from the internal electromagnetic waves.
  • the device 1 is configured to be applied to a conventional remote command device 101, without necessarily completely or partially requiring to modify it.
  • the shielding device 1 comprises a container 2 adapted to surround the remote command device 101 and to receive it in the interior thereof.
  • container 2 is made of an electric conductive material, in order to form a Faraday cage.
  • the container 2 can be made of galvanized steel, preferably having a thickness of about 1 mm.
  • the container comprises a first 3 and second 4 semi-shells separable and connectable to each other, shaped so that the remote command device 101 can be housed inside the container 2 once these are connected.
  • the first semi-shell 3 is destined to cover the command panel 102, for example on the top
  • the second semi-shell 4 is destined to cover the remaining portion of the device 101, for example, the lower portion thereof.
  • the first 3 and second semi-shells 4 are respectively made of a first 5 and second suitable bent sheets 6.
  • the second sheet 6 of the second semi-shell 4 forms part of the front 7 and rear walls 8, and also the lower wall 9 and two lateral walls 12 and 13 opposite to the container 2.
  • the two lateral walls 12 and 13 have a substantially trapezoidal profile, so that the upper portions thereof comprise a horizontal segment and a downwardly sloped segment.
  • the sheet 5 forming the first semi-shell 3, in turn, is preferably bent in order to abut said horizontal sloped segments of the lateral walls 12 and 13, and therefore comprises a substantially horizontal upper portion 14 and a sloped front portion 15 joining with the front wall 7 formed by the second sheet 6.
  • the first sheet 5 forming the first semi-shell 3 further preferably comprises a rear portion 16 joining with the rear wall 8 formed by the second sheet 6.
  • the first semi-shell 3 in order to connect the first semi-shell 3 to the second semi-shell 4, they comprise a plurality of preferably outwardly protruding fins 17, shaped so that they match with each other and having for example holes 18 for reciprocally connecting the former by connecting members, for example threaded members (not shown in the figures).
  • the holes 18 are sized and spaced so that the shielding action of the shielding device 1 is not jeopardized.
  • the first sheet 5 can be shaped in order to define two lateral grooves 20 with the lateral walls 12 and 13, in which corresponding portions of the handle 19 can be positioned and fixed.
  • the container 2 comprises a removable cover 23 in order to enable to gain access to the battery of the remote command device 101.
  • the removable cover 23 is positioned in the lower wall 9.
  • the container 2 comprises one or more openings to enable to gain access to the pushbuttons 103 and manual command members 104.
  • the container 2 can comprise a first elongated opening 21 enabling the command levers of the device 101 to outwardly protrude from the container 2, the levers being preferably juxtaposed and aligned, and one or more further openings 22 for the pushbuttons 103 and/or knobs of the device 101.
  • the elongated opening 22 can be formed in the front portion 15 of the sheet 5, while the further openings 22 can be formed in the upper portion 14 of the sheet 5.
  • one of the further openings 22 can be formed in one of the lateral wall 12 or 13, for enabling to gain access to a pushbutton 107 for the emergency stop of the remote command device 101.
  • the container 2 comprises a further opening 24 enabling the passage of a wire 106 and to connect this latter to the outlet 105 of the remote command device 101.
  • the container 2 By assembling the container 2 with the remote command device 101 and using a shielded cable 106, it is possible to shield the internal electromagnetic waves of the device 101 and also other electrostatic and electromagnetic interference sources generated by the communication between the remote command device 101 and the crane control unit 201.
  • a second container 202 adapted to surround this latter and configured to form, in turn, a second Faraday cage.
  • the second container 202 can comprise openings 203 enabling levers or pushbuttons to protrude and a door 204 openable for gaining access to the interior of the second container 202 itself.
  • a kit comprising the shielding device 1, shielded wire 106 and second container 202 enables to effectively shield the electromagnetic waves in the presence of a communication between the device 1 and crane control unit 201 implemented by a wire, in other words through the shielded wire 106 itself.
  • the above cited openings are subjected to dimensional constrains, as it will be explained in the following, such to ensure the shielding based on the characteristics of the remote command device 101 and crane control unit.
  • the Applicant has observed that, despite the container 2 effectively shields the internal electromagnetic waves produced by the remote command device 101 (and further shields the remote command device 101 from the electromagnetic waves possibly produced by external devices), for some dimensions of the openings, it is not capable of shielding from radio waves produced by the same if this wirelessly communicates with the crane command unit 201. Consequently, the shielding device 1 can be held on the remote command device 101 both in case of a by-wire communication with the crane command unit (and in this case there is an effective shielding against the electromagnetic waves) and in case the communication is wireless (and in this case obviously there is no shielding against the radio waves, however the removal of the shielding device 1 is not required).
  • the openings present in the container should have suitable dimensions so that are shielded the electromagnetic internal waves and are not shielded the radio waves (or, more generally, the electromagnetic waves) produced by the transmission unit.
  • the electromagnetic waves caused by the wireless transmission are not shielded if at least one of the container 2 openings has a dimension equal to at least 1/6 the wavelength of these.
  • the wavelength is of about 12.5 cm. Consequently, at least one of the openings of the container 2 must have a dimension greater than about 2 cm, preferably greater than 2.5 cm.
  • all the openings of the container are required to have a dimension such to shield the internal electromagnetic waves, which usually vary among frequencies comprised from about 1 MHz to 1GHz.
  • all the openings of the container have a dimension less than at least 1/6, preferably less than at least 1/10 the smallest wavelength of the internal electromagnetic waves. For example, if the frequencies of the internal electromagnetic waves are comprised from about 1 MHz to 100 MHz, the smallest wavelength is equal to about 3 m, so that the greatest dimension of the openings should not be greater than about 30 cm.
  • such dimension enables the passage of radio waves at 2.4 GHz, so that if all the openings of the container have dimensions less than 30 cm and at least one opening has at least one dimension greater than 2-2.5 cm, it is possible to obtain the desired effect, in other words shielding the internal electromagnetic waves and the passage of the radio waves through the Faraday cage made by the container 2.
  • the dimensions of the openings cannot be defined once and for all, but they should be selected as a function of the used remote command device and of the frequency of the radio waves used by it.
  • the antenna is integrated in the remote command device and consequently is housed inside the container.
  • the antenna in the conditions of use, protrudes from the container 2, the minimum dimension constraint of at least one of the openings can be neglected.
  • the same arguments are still valid. Consequently, if the antenna 205 protrudes from the container 202, it is not required to provide openings having a minimum extension for avoiding to shield the radio waves. Obviously, if the antenna 205 were inside the second container 202 in conditions of use, at least one opening having a minimum dimension (for avoiding to shield the radio waves) and a maximum dimension (for shielding the internal electromagnetic waves of the crane control unit) calculated by modes analogous to the ones described with reference to the container 2 of the remote command device 1, could be provided.
  • the shielding device it is possible to electromagnetically shield a remote command device of a crane if used in a by-wire transmission mode, maintaining at the same time the possibility of using it also in a wireless transmission mode, without requiring to remove the shielding device itself.
  • the shielding device can be applied to a conventional existing remote command device or can be integrated in the remote command device itself.
  • kit comprising the shielding device, a shielded wire and possibly a second container to be applied to the crane control unit, enables to obtain an electromagnetic shielding of the crane-remote command device system if this is used in a by-wire mode, simultaneously maintaining the possibility of using the same system in the wireless mode without the necessity to remove any components of the kit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Claims (14)

  1. Dispositif (1) de blindage électromagnétique d'un dispositif de commande à distance (101) d'une grue comprenant un panneau de commande (102) comportant un ou plusieurs leviers et/ou un ou plusieurs boutons poussoirs et/ou un ou plusieurs boutons servant à gérer les opérations de la grue, et une unité de transmission configurée pour une communication filaire et/ou non filaire avec une unité de commande (201) de la grue, ledit dispositif de blindage (101) comprenant un conteneur (2) en matériau électriquement conducteur et apte à recevoir intérieurement le dispositif de commande à distance (101) de la grue afin de former une cage de Faraday, dans lequel ledit conteneur (2) comprend une ou plusieurs ouvertures (21, 22) servant à accéder audit ou auxdits leviers et/ou boutons poussoirs et/ou boutons du dispositif de commande à distance (101) de la grue depuis l'extérieur du conteneur (2), ladite ou lesdites ouvertures ayant des dimensions telles que la cage de Faraday blinde les rayonnements électromagnétiques générés à l'intérieur du dispositif de commande à distance (101) de la grue et permet aux ondes électromagnétiques générées par l'unité de transmission de traverser la cage de Faraday lorsque l'unité de transmission communique sans fil avec l'unité de commande (201) de la grue.
  2. Dispositif de blindage (1) selon la revendication 1, dans lequel ladite ou lesdites ouvertures du récipient (2) comprennent en outre une ouverture supplémentaire (24) permettant à un fil (106) de le traverser et de relier le fil à une prise (105) de l'unité de transmission du dispositif de commande à distance (101) de la grue lorsque l'unité de communication communique de façon filaire avec l'unité de commande de la grue (201).
  3. Dispositif de blindage (1) selon l'une quelconque des revendications précédentes, dans lequel au moins une de ladite ou desdites ouvertures (21, 22, 24) du conteneur (2) a une dimension égale à au moins 1/6 de la longueur d'onde des ondes électromagnétiques générées par l'unité de transmission lorsque celle-ci communique sans fil avec l'unité de commande (201) de la grue.
  4. Dispositif de blindage (1) selon l'une quelconque des revendications précédentes, dans lequel ladite ou lesdites une ou plusieurs ouvertures (21, 22, 24) du conteneur (2) ont des dimensions inférieures à au moins 1/6 de la plus petite longueur d'onde des ondes électromagnétiques générées à l'intérieur du dispositif de commande à distance (101) de la grue.
  5. Dispositif de blindage (1) selon l'une quelconque des revendications précédentes, dans lequel ladite ou lesdites ouvertures (21, 22, 24) du conteneur (2) ont des dimensions inférieures à au moins 1/10 de la plus petite longueur d'onde des ondes électromagnétiques générées à l'intérieur du dispositif de commande à distance (101) de la grue.
  6. Dispositif de blindage (1) selon l'une quelconque des revendications précédentes, dans lequel le conteneur (2) comprend une première (3) et une seconde demi-coquilles (4) séparables et pouvant être reliées l'une à l'autre.
  7. Dispositif de commande à distance (101) d'une grue comprenant un panneau de commande (102) comportant un ou plusieurs leviers et/ou un ou plusieurs boutons poussoirs et/ou un ou plusieurs boutons servant à gérer les opérations de la grue, et une unité de transmission configurée pour une communication filaire ou non filaire avec une unité de commande (201) de la grue, dans lequel ledit dispositif de commande à distance (101) de la grue comprend un dispositif de blindage (1) selon l'une quelconque des revendications 1 à 6.
  8. Dispositif de commande à distance (101) d'une grue selon la revendication 7, dans lequel l'unité de transmission comprend une antenne intégrée dans le dispositif de commande à distance lui-même, de telle sorte que l'antenne est également reçue à l'intérieur du conteneur (2) du dispositif de blindage (1).
  9. Dispositif de commande à distance (101) d'une grue selon la revendication 7 ou 8, comprenant une prise (105) servant à relier l'unité de transmission à l'unité de commande (201) de la grue par un fil (106).
  10. Kit de blindage électromagnétique d'un dispositif de commande à distance (101) d'une grue comprenant un panneau de commande (102) comportant un ou plusieurs leviers et/ou un ou plusieurs boutons poussoirs et/ou un ou plusieurs boutons servant à gérer les opérations de la grue, et une unité de transmission configurée pour une communication filaire et/ou non filaire avec une unité de commande (201) de la grue, ledit kit comprenant un dispositif de blindage selon l'une quelconque des revendications 1 à 6 et un fil blindé (106) servant à relier de façon filaire l'unité de transmission du dispositif de commande à distance (101) de la grue à l'unité de commande (201) de la grue.
  11. Kit selon la revendication précédente, comprenant en outre un second conteneur (202) en matériau électriquement conducteur et apte à entourer l'unité de commande (201) de la grue pour former une seconde cage de Faraday sur celle-ci afin de blinder les ondes électromagnétiques générées à l'intérieur de l'unité de commande de la grue.
  12. Kit selon la revendication précédente, dans lequel ledit second conteneur (202) comprend une ouverture conçue de manière à permettre audit câble blindé (106) de traverser et de le relier à l'unité de commande de la grue.
  13. Kit selon la revendication 11 ou 12, dans lequel ledit second conteneur (202) comprend une ouverture conçue de manière à permettre à une antenne (205) de l'unité de commande de la grue de faire saillie à l'extérieur de la seconde cage de Faraday.
  14. Procédé de blindage électromagnétique d'un dispositif de commande à distance (101) d'une grue comprenant un panneau de commande (102) comportant un ou plusieurs leviers et/ou un ou plusieurs boutons poussoirs et/ou un ou plusieurs boutons servant à gérer les opérations de la grue, et une unité de transmission configurée pour une communication filaire ou non filaire avec une unité de commande (201) de la grue, ledit procédé comprenant :
    - la fourniture dudit dispositif de commande à distance (101) de la grue ;
    - son positionnement à l'intérieur d'un dispositif de blindage selon l'une quelconque des revendications 1 à 6.
EP19181226.2A 2018-09-18 2019-06-19 Dispositif, kit et procédé pour blindage électro-magnétique d'une télécommande d'une grue Active EP3626674B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19181226T PL3626674T3 (pl) 2018-09-18 2019-06-19 Urządzenie, zestaw i sposób do elektromagnetycznego ekranowania urządzenia zdalnego sterowania dla żurawia

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT201800008686 2018-09-18

Publications (2)

Publication Number Publication Date
EP3626674A1 EP3626674A1 (fr) 2020-03-25
EP3626674B1 true EP3626674B1 (fr) 2021-01-13

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EP19181226.2A Active EP3626674B1 (fr) 2018-09-18 2019-06-19 Dispositif, kit et procédé pour blindage électro-magnétique d'une télécommande d'une grue

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EP (1) EP3626674B1 (fr)
DK (1) DK3626674T3 (fr)
PL (1) PL3626674T3 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006017127U1 (de) * 2006-11-09 2008-03-20 Haug, Thomas Bediengerät, insbesondere Fernsteuergerät für Industriegeräte
CN201746235U (zh) * 2010-05-14 2011-02-16 中国长江动力公司(集团) 吊钩桥式起重机线控和遥控转换电路
DE202010007057U1 (de) * 2010-05-20 2010-08-26 Weyhofen, Jürgen Schutzeinrichtung für Fernsteuerungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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Publication number Publication date
PL3626674T3 (pl) 2021-06-28
EP3626674A1 (fr) 2020-03-25
DK3626674T3 (da) 2021-03-15

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