EP3405755A1 - Unité électronique pour un débitmètre - Google Patents

Unité électronique pour un débitmètre

Info

Publication number
EP3405755A1
EP3405755A1 EP17700978.4A EP17700978A EP3405755A1 EP 3405755 A1 EP3405755 A1 EP 3405755A1 EP 17700978 A EP17700978 A EP 17700978A EP 3405755 A1 EP3405755 A1 EP 3405755A1
Authority
EP
European Patent Office
Prior art keywords
additional
electronic unit
connection box
board
connection
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Withdrawn
Application number
EP17700978.4A
Other languages
German (de)
English (en)
Inventor
Otfried Derschmidt
Manfred PROSS
DR. Heribert KAMMERSTETTER
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.)
AVL List GmbH
Original Assignee
AVL List GmbH
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 AVL List GmbH filed Critical AVL List GmbH
Publication of EP3405755A1 publication Critical patent/EP3405755A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/14—Casings, e.g. of special material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
    • H05K7/1435—Expandable constructions

Definitions

  • the invention relates to an electronics unit for a flowmeter with a motherboard for controlling the flowmeter, at least one further additional board with additional electronic components, an electrical connection between the motherboard and the at least one additional board and a connection box in which the at least one additional board is attached.
  • Such electronic units are used in various devices, for example, to control these, which is usually done via the motherboard to receive electronic feedback, which can be done for example via data acquisition cards to forward or process data or to communicate via radio modules with other electronic units.
  • Flow rate meters have an electric motor driven Verdrängernähler in the form of a gear pump, which is arranged parallel to a Differenzbuchbergersacrificing in the form of a arranged in a piston chamber piston, wherein the gear pump is controlled so that the differential pressure is compensated at Differenzdruckillersacrificing, so no differential pressure across the piston arises ,
  • This consists of an electric drive unit and an associated motherboard, via for example, the signals of the electric motor can be received, the power supply of the stator can be carried out according to the required drive signals or the processing of the data of the flowmeter can be performed.
  • these electronic units are usually installed at different locations in the flowmeter by the various additional boards are attached to housing parts of the flowmeter, for example via screws. Subsequently, the additional boards, if necessary, are connected to each other via additional cable to be laid in the housing. The respective plugs of the additional boards also protrude at different positions out of the housing.
  • the at least one additional board is electrically detachably connected via an electrical plug connection to the motherboard which is mounted in a housing of the flowmeter and the connection box is mechanically removably attached to the housing of the flowmeter, only the one connector must be solved by the flowmeter, to electrically connect and disconnect the additional boards.
  • the flowmeter can be adapted to the respective customer requirements by using different equipment with additional boards in the junction box.
  • the explosion protection standard is easy to comply with such an electronic unit.
  • connection box Preferably, a plurality of additional boards are arranged in the connection box, which are aligned via tongue and groove connections to each other. Accordingly, the position of the additional boards in the connection box to each other is produced by positive engagement, which eliminates additional mounting steps for attachment or additional fasteners.
  • the junction box on an open side, from which the plug for producing the electrical connector to the motherboard protrudes, and through which the additional boards are inserted into the junction box. It can thus be used a box closed on five sides, which can be carried out correspondingly tight and itself no longer has to be mounted. The closure of the open side can be done by attaching the junction box to the housing and simultaneously making the electrical connection to the motherboard, which then creates an all-sided closed junction box.
  • the plug is preferably a flat plug of a bus system in this embodiment. Its number of connections to be occupied can be easily changed by appropriate execution of the additional boards used, the connection to the motherboard is to be established by simply pushing.
  • junction box and the junction box and the motherboard and the flowmeter to a central voltage source or additional central control or evaluation is advantageously at least one electrical connector or a cable bushing attached to a first additional board inside the junction box and protrudes from the inside of Connection box through an opening in a side wall of the junction box to the outside.
  • plugs or sockets remain easily accessible even after the connection box has been fitted and can be designed as explosion-proof components.
  • the additional circuit board having the connection plug is positioned in the interior of the connection box by fastening the connection plug to the side wall of the connection box. This takes place, for example, in that the connector has a thread on its outer circumference, onto which, after insertion of the Connector is screwed through the opening of the side wall a nut. A single attachment of the additional board and the connector is not required accordingly.
  • two additional boards are arranged with connector plugs inside the junction box, the connector plug protrude on opposite side walls through openings of the junction box, so that the additional boards are arranged on opposite sides of the junction box. This reduces the required installation space of the connection box.
  • one of the walls of the junction box is covered by a hinged or festschraubbaren plastic lid.
  • a hinged or festschraubbaren plastic lid This allows to arrange an additional board of a radio module between the wall and the plastic lid, which is not shielded according to the inside of the junction box without cover. Accordingly, the possibility of a radio transmission is created by the plastic lid, which is still reliably protected from dirt and can be mounted together with the junction box on the housing of the flowmeter.
  • the additional board of the radio module is arranged on a side opposite to the open side arranged rear wall between the rear wall of the connection box and the hinged plastic lid.
  • two additional boards are electrically connected to each other in the interior of the connection box via a ribbon cable.
  • an electrical contacting of two additional boards can be produced in a simple manner.
  • a third additional board is aligned via the tongue and groove joints to the two additional boards, which have the connector. Accordingly, the position of the third additional board in the connection box is completely determined by a simple to produce tongue and groove connection without having to use fasteners.
  • an electrical connection can be produced in a simple manner, for example by soldering between the additional boards.
  • the third additional board protrudes with a tongue formed at its end through a slot in the rear wall on the side opposite the plug from the connection box and is secured via a retaining element form-fitting manner to the rear wall.
  • the retaining element is a fixing plate with two lugs, wherein the fixing plate bears against the rear wall and the lugs behind two laterally projecting hooks at the end of the tongue of the third additional board. Accordingly, the fixing plate can easily be pushed along the rear wall with their noses under the hook, whereby a positive connection is formed, which prevents a displacement of the third additional board.
  • the holding element is the additional board of the radio module, which has two projections which engage behind two laterally projecting hooks at the end of the tongue of the third additional board. So can be dispensed with additional components and both cards get a positive retention. It is also advantageous if the height of the third additional board substantially corresponds to the distance between a bottom and a ceiling of the connection box, so that even a clamping of the third additional board between the floor and ceiling of the connection box, which again precludes movement in the box ,
  • the third additional board is an SD card board, which can then be read out from the outside, if the corresponding design is made, when the corresponding contacts are formed on the part of the SD card projecting through the rear wall.
  • a simple electrical connection between the additional boards can be made by at least two nested additional boards are connected by soldering.
  • an electronic unit for a flow meter which has a high flexibility of the flow meter depending on customer requirements with minimal installation effort.
  • the installation space for additional electronics is minimized.
  • the electronics are shielded, protected against contamination and accommodated vibration-proof.
  • FIG. 1 shows a perspective view of a flow meter with mounted connection box.
  • FIG. 2 shows a corresponding view of the electronics unit immediately before the connection box is mounted on the flowmeter, wherein the housing of the flowmeter is shown partially in section.
  • FIG. 3 shows a perspective view of the connection box from an open side.
  • FIG. 4 shows a perspective view of the connection box from a side opposite to FIG. 3 with the cover opened.
  • FIG. 5 shows a perspective view of the arrangement of the additional boards of the electronics unit with the connection box cut away.
  • FIG. 6 shows a perspective view of the connection box from an opposite side to FIG. 3 with the lid open with an alternative attachment.
  • the flow meter 11 shown in FIG. 1 consists of an electric motor-driven positive-displacement meter in the form of a gear pump, which is arranged in a housing 10 and is arranged fluidically parallel to a differential pressure transducer in the form of a piston arranged in a piston chamber whose housing is protected by a cover 12 is.
  • the gear pump is controlled in such a way that the differential pressure at the differential pressure transducer is compensated, ie no differential pressure is created across the piston.
  • the drive motor of the gear pump must be correctly controlled and on the other hand different measured values must be recorded, further processed and returned.
  • a flow must be calculated from the measured and control values obtained and this data must be passed to the outside.
  • an electronic unit 14 according to the invention is used, which has a main circuit board 16, which is arranged with the drive motor in the interior of a cover 18 of the housing 10 and via which the drive motor is driven as a function of the measured values.
  • the main circuit board 16 is attached to support elements 19 and has at its end facing away from the housing 10 on a plug counterpart 20 of a bus system.
  • a plug 22 can be inserted for the production of an electrical connector 23 which projects from an open side 24 of a junction box 26 and is formed by contact ends 28 of two additional boards 30, 32 which are arranged in the interior of the connection box 26.
  • connection box 26 has a substantially cuboidal shape and has a closed base 34 and a closed ceiling 36 facing the cover hood 18.
  • connection box 26 On its open side 24, the connection box 26 has a flange-like extension 38 with bores 40, via which the connection box 26 can also be mechanically attached to the cover 18 or one of the support elements 19 can be fastened by means of screws 42.
  • openings 48, 50 are formed, through which electrical connection plugs 52, 54 protrude outwardly from the interior of the connection box 26.
  • a total of three additional boards 30, 32, 56 are arranged in the interior of the connection box 26, which carry additional electronic components 58, which are not formed on the motherboard 16, so that, depending on customer requirements, the number and design of the additional boards 30, 32, 56 with her Modules 58 can be changed without having to make further changes to the flowmeter 11.
  • the inventive fixing and mounting of the additional boards 30, 32, 56 in the interior of the connection box 26 takes place by first the first additional board 56 is pushed from the open side 24 into the connection box 26.
  • This first additional board 56 has a ribbon cable 60 and the connector 52, which is pushed from the inside through the opening 48 in the side wall 44. By screwing a nut 62 from the outside on the connector 52, the additional board 56 is fixed in position on the side wall 44.
  • the second additional board 30 is pushed from the open side 24 into the connection box 26.
  • This second additional board 30 has a total of three connector 54, which are pushed by three correspondingly shaped openings 50 in the sidewall 44 opposite the side wall 46. While the first add-on board 56 extends along the side wall 44, the second add-on board, after being fastened, extends parallel to the floor 34 by nuts 64 screwed onto the plugs 54 from outside. At its end projecting from the open side 24 is a formed in the view from the open side 24 left part of the contact ends 28 of the plug 22. Subsequently, the ribbon cable 60 of the first additional board 56 is inserted into a plug element 61 of the second additional board 30.
  • the third additional board 32 is in the present embodiment, an SD card board whose height corresponds to the distance from the bottom 34 to the ceiling 36 of the junction box 26. It extends in the installed state perpendicularly from the bottom 34 to the ceiling 36 of the junction box 26 and has an angled end 66 on which the right part of the contact ends 28 of the plug 22 is formed and which is corresponding horizontally in the junction box 26 in extension of the open side 24 projecting end of the second additional board 30 extends.
  • this third additional board 32 is inserted into the junction box 26, wherein on the open side facing end of the additional board 32 in the vertically extending portion a groove 68 is formed, which is pushed over an acting as a spring 70 extension of the second additional board 30.
  • a groove 72 is formed on the first additional board 56, into which acts as a spring 74 extension of the third additional board 32, which is formed on the horizontally extending portion engages upon insertion of the third additional board 32.
  • the third additional board 32 has a tongue 76 which, when pushed into the connection box, is pushed through a slot 78, which is formed in a rear wall 80 opposite the open side, which can be seen in FIGS. 3 and 6. Accordingly, the third additional board 32 is positively secured in this state at three points.
  • two laterally projecting hooks 82 are formed on the tongue 76, behind which two lugs 84 of a holding element designed as a fixing plate 86 engage behind, which is pushed along the rear wall 80. so that the lugs 84 are clamped between the rear wall 80 and the hooks 82.
  • the location of all three add-on boards 30, 32, 56 is completely set.
  • the second additional board 30 is soldered in the region of the groove 68 spring 70 connection with the third additional board 32.
  • a hinged plastic lid 88 is additionally formed, which is fastened via hinges 90 to the connection box 26.
  • the plastic lid 88 has a closing plate 92 and walls 94 which extend on all sides perpendicularly from the ends of the closing plate 92 in the direction of the rear wall 80, so that in the closed state, a narrow space 96 between the rear wall 80, the junction box 26 and the plastic lid 88th is formed.
  • a circumferential seal 98 formed so that a tight closure of the space 96 is made with closed plastic lid 88.
  • this space 96 serves to accommodate an additional board 100 of a radio module, which would not function within the metallic connection box.
  • Such an additional board 100 can either be glued to the rear wall and / or additionally serve as a holding element for fixing the third additional board 32 by corresponding protrusions 102 are formed at the end of the additional board 100, which can be pushed under the hook 82 of the third additional board 32.
  • the assembly of the junction box 26 is completed and can be pushed in this state with the open side into the connector counterpart 20 and fixed to the cover 18.
  • an electronic unit in which a motherboard which is always present can easily be separated from a connection box, the equipment of which can be adapted to customer requirements, as is required, for example, during a calibration.
  • the connections of such an electronic unit comply with the European standards for explosion protection.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measuring Volume Flow (AREA)
  • Casings For Electric Apparatus (AREA)
  • Connection Or Junction Boxes (AREA)

Abstract

L'invention concerne une unité électronique (14) pour un débitmètre (11) comprenant une platine principale (16) pour la commande du débitmètre (11), au moins une autre platine supplémentaire (30 ; 32 ; 56) dotée de composants électroniques (58) supplémentaires, une connexion enfichable électrique entre la platine principale (16) et ladite au moins une platine supplémentaire (30 ; 32 ; 56) et un boîtier de connexion (26) dans lequel ladite au moins une platine supplémentaire (30 ; 32 ; 56) est fixée. L'invention vise à pouvoir adapter cette unité électronique plus facilement aux exigences des clients et à pouvoir séparer la platine supplémentaire de la platine principale et la reconnecter à celle-ci plus facilement pour l'étalonnage du débitmètre. À cet effet, ladite au moins une platine supplémentaire (30 ; 32 ; 56) est connectée de manière amovible électriquement, par le biais d'une connexion enfichable électrique (23), à la platine principale (16) qui est fixée dans un boîtier (10) du débitmètre (11) et le boîtier de connexion (26) est fixé de manière amovible mécaniquement au boîtier (10) du débitmètre (11).
EP17700978.4A 2016-01-21 2017-01-20 Unité électronique pour un débitmètre Withdrawn EP3405755A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA22/2016A AT517608B1 (de) 2016-01-21 2016-01-21 Elektronikeinheit für ein Durchflussmessgerät
PCT/EP2017/051175 WO2017125542A1 (fr) 2016-01-21 2017-01-20 Unité électronique pour un débitmètre

Publications (1)

Publication Number Publication Date
EP3405755A1 true EP3405755A1 (fr) 2018-11-28

Family

ID=57860877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17700978.4A Withdrawn EP3405755A1 (fr) 2016-01-21 2017-01-20 Unité électronique pour un débitmètre

Country Status (6)

Country Link
US (1) US20190353510A1 (fr)
EP (1) EP3405755A1 (fr)
JP (1) JP6588168B2 (fr)
CN (1) CN108474681A (fr)
AT (1) AT517608B1 (fr)
WO (1) WO2017125542A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117706150B (zh) * 2024-02-05 2024-04-16 佳木斯意合科技有限公司 一种电表

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Also Published As

Publication number Publication date
AT517608A4 (de) 2017-03-15
JP6588168B2 (ja) 2019-10-09
JP2019502926A (ja) 2019-01-31
US20190353510A1 (en) 2019-11-21
AT517608B1 (de) 2017-03-15
WO2017125542A1 (fr) 2017-07-27
CN108474681A (zh) 2018-08-31

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