EP4311640A1 - Dispositif de compactage de béton avec mesure de la progression de compactage - Google Patents

Dispositif de compactage de béton avec mesure de la progression de compactage Download PDF

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Publication number
EP4311640A1
EP4311640A1 EP23187063.5A EP23187063A EP4311640A1 EP 4311640 A1 EP4311640 A1 EP 4311640A1 EP 23187063 A EP23187063 A EP 23187063A EP 4311640 A1 EP4311640 A1 EP 4311640A1
Authority
EP
European Patent Office
Prior art keywords
current
concrete
electric motor
concrete compaction
compaction
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.)
Pending
Application number
EP23187063.5A
Other languages
German (de)
English (en)
Inventor
Christian Lange
Patrick Diller
Dirk Sibila
Rudolf Philipp BERGER
Alto WEISKOPF
Christian Glanz
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.)
Wacker Neuson Produktion GmbH and Co KG
Original Assignee
Wacker Neuson Produktion GmbH and Co KG
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 Wacker Neuson Produktion GmbH and Co KG filed Critical Wacker Neuson Produktion GmbH and Co KG
Publication of EP4311640A1 publication Critical patent/EP4311640A1/fr
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/08—Internal vibrators, e.g. needle vibrators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/093—Producing shaped prefabricated articles from the material by vibrating or jolting by means directly acting on the material, e.g. by cores wholly or partly immersed in the material or elements acting on the upper surface of the material
    • B28B1/0935—Producing shaped prefabricated articles from the material by vibrating or jolting by means directly acting on the material, e.g. by cores wholly or partly immersed in the material or elements acting on the upper surface of the material using only elements wholly or partly immersed in the material, e.g. cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/0063—Control arrangements
    • B28B17/0081—Process control

Definitions

  • the invention relates to a concrete compaction device with a device for measuring the progress of compaction.
  • the invention relates to an internal vibrating device, such as an internal vibrator for concrete compaction.
  • vibrators such as. B. hose or rod vibrators. condensed.
  • Such vibrators are internal vibrators in which an imbalance is driven by an electric motor inside a vibrating bottle (vibrator housing) that is immersed in the fresh concrete, which creates vibrations that compact the concrete.
  • vibrators While concrete as a building material is subject to various and strict quality controls, the correct compaction of the concrete depends significantly on the individual skills of the operator of the internal vibrator. He alone determines whether an optimal and uniform compaction result is achieved. However, since the individual skills of different operators can naturally vary greatly, the quality of compaction can also vary considerably, which in certain cases leads to an inadequate compaction result and thus to insufficient concrete strength.
  • the invention is therefore based on the object of specifying a concrete compaction device, in particular an internal vibrating device, in which the degree of compaction of the currently compacted concrete can be reliably recorded.
  • a concrete compaction device is specified, with a vibrating housing for immersion in flowable concrete; an unbalance exciter driven by an electric motor, which is arranged in the vibrator housing; a current detection device for detecting the electric current consumed by the electric motor; and with an evaluation device for determining a working state of the concrete compaction device based on the currently detected electrical current; wherein the working state is selected from the group of positioning the vibrating housing in the air (operating the electric motor at idle), immersing the vibrating housing in the concrete, carrying out a compaction process with the vibrating housing immersed in the concrete, emerging the vibrating housing from the concrete; and wherein the evaluation device is designed to recognize all of the working states mentioned.
  • the electric motor can be arranged together with the unbalance exciter in the vibrating housing.
  • only the unbalance exciter is arranged in the vibrating housing, while the electric motor is arranged spatially separated from the vibrating housing in its own housing. In this case, the torque of the electric motor is transmitted via a flexible shaft to the unbalance exciter in the vibrator housing.
  • the working states can be recognized in particular based on the precisely recorded current curve with a correspondingly high sampling rate. While playing Not only the current current value, but also the change in the current values over time (e.g. detectable with the help of the sampling rate) plays a role, so that specific current profiles can be recorded and recognized. Due to the tendency of the current curve, the evaluation device can recognize the different working states and - where appropriate - also distinguish them from one another. For this purpose, the currently recorded current profile can be compared with current values and current curves or gradients, for example with known values or patterns, in order to be able to draw conclusions about the respective working status.
  • the working states “positioning the vibrating housing in the air” and “operating the electric motor at idle” are to be regarded as identical. In this case, the vibrator housing is still exposed to air and is not yet immersed in the concrete.
  • the electric motor can be operated at idle or almost at idle, as the unbalance exciter can still rotate freely.
  • the compaction work begins with the working condition “immersion of the vibrator housing into the concrete”.
  • the vibrating housing is successively lowered into the flowable concrete, which absorbs and dampens the vibrations of the vibrating housing.
  • the current consumption by the electric motor is increased in order to be able to drive the unbalance exciter as before.
  • the vibrating housing In the working state "carrying out a compaction process", the vibrating housing is largely completely immersed in the concrete and is held essentially stationary by the user at one point, so that the vibrating housing remains in the concrete. Due to the compaction effects in the concrete, the damping effect of the concrete on the vibrator housing changes, which in turn has an effect in the form of counterforces or countertorques acting on the unbalance exciter. This changes the current consumption by the electric motor, which can be recorded by the evaluation device.
  • the vibrating housing In the working state "Exiting the vibrating housing from the concrete", the vibrating housing is pulled out of the concrete and raised. This means that the vibrating housing can vibrate more and more freely as the damping effect of the concrete gradually decreases. Accordingly, the electric motor can rotate freely again, so that the power it consumes is reduced and power consumption is reduced.
  • the evaluation device can use the respectively sampled current values and the gradients of the current values or the tendency of the current value development to recognize which working state the internal vibrator is in.
  • the evaluation device can detect the compaction state of the concrete based on the current profile, i.e. the current values and the gradient curve, and compare it with limit values, for example. If a certain limit value is reached, this is taken as a criterion that the concrete has been sufficiently compacted at this point.
  • the evaluation device can recognize the working states “electric motor switched off” and “electric motor and/or unbalance exciter defective” as further working states.
  • the electric motor either does not consume any power or a current consumption or a current profile is detected that does not fit into the schemes for the normal working states, e.g. a current consumption that is too low or too high.
  • the current detection device can be designed to detect the electrical voltage applied to the electric motor in addition to the current. This allows the measurement accuracy to be further increased.
  • the current detection device can be designed to detect the current with a sampling interval, wherein the sampling interval can be less than 5 s.
  • the sampling interval can be less than 2 s, less than 1 s, less than 0.5 s or 1/10 s or less.
  • the evaluation device can be designed to determine the respective working state, taking into account the currently detected current profile with a currently detected electrical current and/or a respective determinable current gradient.
  • the current gradient is a change in the current current value over time.
  • the evaluation device can thus record the working condition and also the degree of compaction in the concrete.
  • the current value and current gradient can be evaluated together or separately. An example of the evaluation will be explained later in the description of the figures.
  • An interpretation device can be provided for interpreting the current curve during the working state "carrying out a compression process" is recognized, wherein the interpretation device can be designed to evaluate the current current gradient for interpreting the current profile, and wherein an approach of the current gradient to the values of zero is considered a criterion for compression progress. As the current gradient approaches zero, this means that the current current curve becomes flatter. This can be observed in the course of the compression process, whereby an approach of the current gradient towards zero means that the currently consumed current hardly changes. This is seen as a criterion for ensuring that the concrete in the area of the vibrating bottle has been sufficiently compacted.
  • a limit value for the approach of the current gradient to the value zero can be specified, and a signaling device can be provided to generate a signal for an operator when the limit value is reached by the current gradient. It is therefore not absolutely necessary that the current gradient actually reaches the value zero. Rather, an approach to the value zero and thus reaching the limit value may be sufficient. Reaching the limit value means that the concrete has been sufficiently compacted at that point. This condition can be determined by the interpretation device, which then gives the operator a signal via the signaling device that the concrete has been sufficiently compacted so that the operator can move the vibrating housing to another location in the concrete.
  • a power supply line can be provided for supplying the electrical current to the electric motor.
  • the current detection device can be arranged in the area of the power supply line in order to be able to detect the electrical current that is absorbed by the electric motor.
  • a power source can be provided for the electric motor, which has an electrical energy storage and/or a power grid.
  • the electrical energy storage can be, for example, a battery.
  • the electrical energy storage can have a portable battery, which is carried on the back of an operator like a backpack, for example.
  • the electrical power for the concrete compaction device can therefore only be obtained from the battery carried by the operator. The operator is therefore self-sufficient and does not need any external power supply connections.
  • the current detection device, the evaluation device and the interpretation device can be arranged on the battery or coupled to the electronics (battery management system) of the battery.
  • these devices can also be (partially) integrated into the battery management system, such as the current detection device.
  • the electrical energy storage can have control electronics, wherein the current detection device and/or the evaluation device and/or the interpretation device can be coupled to the control electronics.
  • the current detection device, the evaluation device and/or the interpretation device can also be arranged spatially on the control electronics or the energy storage device.
  • Fig. 1 shows a schematic representation of a concrete compaction system with an internal vibrator 1 and an energy device 2.
  • the internal vibrator 1 has an operating hose 3, at one end of which a vibrating bottle 4 serving as a housing is attached. Inside the vibrating bottle 4, an electric motor 5 is provided, which rotates an unbalance exciter 6.
  • the unbalance exciter 6 can, for example, be an unbalance shaft on which an unbalance mass is attached eccentrically, so that when the unbalance shaft rotates, vibrations are generated which are introduced into the concrete to be compacted via the outer housing wall of the vibrating bottle 4.
  • the structure of such a vibrating bottle 4 with an electric motor 5 and unbalance exciter 6 is known per se.
  • the electric motor 5 is not arranged in the vibrating bottle 4, but in its own housing, spatially separated from the vibrating bottle 4. In this case extends between the electric motor 5 and the unbalance exciter 6 arranged in the vibrating bottle 4 there is a flexible shaft via which the torque of the electric motor 5 can be transmitted to the unbalance exciter 6.
  • the flexible shaft is surrounded by the operating hose 3, which can also be used to guide the vibrating bottle 4.
  • the in Fig. 1 The operating hose 3 shown can be several meters long, so that the operator can hang the vibrating bottle 4 over a greater distance in the concrete to be compacted during the compaction work.
  • the Fig. 1 is otherwise not to scale and does not reflect the real length of the operating hose 3.
  • a switching device 7 is attached, via which the electric motor 5 can be switched on and off.
  • the switching device 7 can also serve as a coupling point for a power line 8 (power cable).
  • the electrical supply lines of the power line 8 are guided inside the operating hose 3 to the vibrating bottle 4, so that the operating hose 3 also takes on the function of a protective hose.
  • one in the Fig. 1 Plug, not shown, can be provided in a manner known per se.
  • the plug can be inserted into the energy device 2.
  • essential parts of the energy device 2 can be arranged on a carrying device, not shown, which can be carried by a user, for example on his back, with the aid of carrying straps, similar to a backpack.
  • the carrying device can have a supporting frame that reliably supports the components attached to it. This is also the case, for example DE 10 2018 118 552 A1 described.
  • the energy device 2 has a battery 9 as an electrical energy storage device.
  • the battery 9 can be exchangeable and can be replaced with a fresh battery 9 when it is exhausted.
  • part of the energy device 2 can be a converter 10, which in particular converts the current drawn from the battery 9 in terms of voltage and frequency in a manner suitable for the electric motor 5. This transformed one Electricity is then supplied from the converter 10 to the electric motor 5 via the power line 8.
  • a current detection device 11, an evaluation device 12 and an interpretation device 13 are also provided on the energy device 2. These components can also be arranged elsewhere on the internal vibrator. However, their arrangement in the vicinity of the battery 9 or the converter 10 is useful in order to precisely record and interpret the current drawn by the electric motor 5.
  • the current detection device 11, the evaluation device 12 and the interpretation device 13 do not have to be present as physically separate components. Rather, they can also be arranged in the battery 9 or in the battery management of the battery 9 or in the converter 10 or elsewhere.
  • the evaluation device 12 and the interpretation device 13 can also be spatially arranged elsewhere, for example as a software application on a smartphone that is carried by the operator of the internal vibrator. In this case, a communication path or interface must be provided in order to transmit the current values recorded by the current detection device to the evaluation device 12.
  • the current detection device 11 is used to detect the electrical current that is absorbed by the electric motor 5. It is possible to record the current in short sampling intervals.
  • the measurement results of the current detection device 11 are passed on to the evaluation device 12, which can detect a working state of the internal vibrator based on the currently detected electrical current (current values and current curve or current gradient), as described below using Fig. 2 is explained.
  • the interpretation device 13 is intended to interpret the flow curve during a compression process. In particular, the interpretation device 13 should recognize and classify the compression state during the compression process.
  • a signal device (not shown) can be used Signal can be given to the operator of the internal vibrator 1 so that he ends the compaction at the corresponding point and continues it at another place.
  • the information about the compaction state can be communicated to the operator in various ways.
  • the corresponding data can be displayed to the operator via assistance systems, e.g. applications installed on smartphones.
  • assistance systems e.g. applications installed on smartphones.
  • Fig. 2 shows an example of the course of the current drawn by the electric motor 5 over time during different working states of the internal vibrator 1.
  • the respective current values can be recorded by the current detection device 11 with short sampling intervals.
  • phase a the internal vibrator runs in the air and is not immersed in the concrete (idling phase, operating the electric motor at idle, positioning the vibrator housing in the air). In this phase, the current consumed is constantly low.
  • the progress of the compression process can be deduced by the evaluation device 12 in conjunction with the interpretation device 13.
  • the current drawn always remains higher than in the idling phase in the air (phase a), so that the states of idling (phase a) and "immersed” or “compression” (phase c) can be clearly distinguished from one another.
  • measuring devices are usually already present, for example in the battery control electronics, with which the input power in the form of current and voltage is used to operate the internal vibrator can be measured. Additional sensors, especially in the vibrating bottle or the protective hose, are not required.
  • the measurements can be carried out in a suitable manner with battery-operated internal vibrators, but also with mains-operated internal vibrators.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Automation & Control Theory (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Control Of Electric Motors In General (AREA)
EP23187063.5A 2022-07-25 2023-07-21 Dispositif de compactage de béton avec mesure de la progression de compactage Pending EP4311640A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022118542.7A DE102022118542A1 (de) 2022-07-25 2022-07-25 Betonverdichtungsvorrichtung mit Messung des Verdichtungsfortschritts

Publications (1)

Publication Number Publication Date
EP4311640A1 true EP4311640A1 (fr) 2024-01-31

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Application Number Title Priority Date Filing Date
EP23187063.5A Pending EP4311640A1 (fr) 2022-07-25 2023-07-21 Dispositif de compactage de béton avec mesure de la progression de compactage

Country Status (4)

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US (1) US20240026695A1 (fr)
EP (1) EP4311640A1 (fr)
JP (1) JP2024016002A (fr)
DE (1) DE102022118542A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022134329A1 (de) 2022-12-21 2024-06-27 Wacker Neuson Produktion GmbH & Co. KG Betonagesystem mit Positionsbestimmung für Innenrüttler
DE102022134330A1 (de) 2022-12-21 2024-06-27 Wacker Neuson Produktion GmbH & Co. KG System zum Führen einer Bedienperson bei der Betonverdichtung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1097651A (en) 1965-09-03 1968-01-03 Stothert & Pitt Ltd Improvements in vibratory compactors
JPS60109499A (ja) * 1983-11-18 1985-06-14 株式会社間組 コンクリ−トの締固め装置
EP1165907A1 (fr) 1999-03-23 2002-01-02 Wacker-Werke Gmbh & Co. Kg Vibrateur interne dote d'un systeme de mesure
DE102010032351A1 (de) * 2010-07-27 2012-02-02 Wacker Neuson Produktion GmbH & Co. KG Handgeführtes Arbeitsgerät mit Bedienererkennungseinrichtung
DE102012002166A1 (de) * 2012-02-01 2013-08-01 Technische Universität Dresden Vorrichtung und Verfahren zur Bestimmung der Zusammensetzung von Frischbetonproben
JP2015169003A (ja) * 2014-03-07 2015-09-28 前田建設工業株式会社 フレッシュコンクリート締固め状態報知システム及び品質管理方法
DE102018118552A1 (de) 2018-07-31 2020-02-06 Wacker Neuson Produktion GmbH & Co. KG Tragvorrichtung mit Energiespeicher und elektrischem Umformer
US20200141135A1 (en) * 2018-04-27 2020-05-07 Mikasa Sangyo Co., Ltd. Concrete vibrator with idling mode
CN111946065A (zh) * 2020-08-10 2020-11-17 中交二航武汉港湾新材料有限公司 通过电流变化智能监控混凝土振捣的装置及方法
US20210148126A1 (en) * 2019-11-20 2021-05-20 Milwaukee Electric Tool Corporation Concrete vibrator

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1097651A (en) 1965-09-03 1968-01-03 Stothert & Pitt Ltd Improvements in vibratory compactors
JPS60109499A (ja) * 1983-11-18 1985-06-14 株式会社間組 コンクリ−トの締固め装置
EP1165907A1 (fr) 1999-03-23 2002-01-02 Wacker-Werke Gmbh & Co. Kg Vibrateur interne dote d'un systeme de mesure
EP1165907B1 (fr) * 1999-03-23 2005-05-18 Wacker Construction Equipment AG Vibrateur interne dote d'un systeme de mesure
DE102010032351A1 (de) * 2010-07-27 2012-02-02 Wacker Neuson Produktion GmbH & Co. KG Handgeführtes Arbeitsgerät mit Bedienererkennungseinrichtung
DE102012002166A1 (de) * 2012-02-01 2013-08-01 Technische Universität Dresden Vorrichtung und Verfahren zur Bestimmung der Zusammensetzung von Frischbetonproben
JP2015169003A (ja) * 2014-03-07 2015-09-28 前田建設工業株式会社 フレッシュコンクリート締固め状態報知システム及び品質管理方法
US20200141135A1 (en) * 2018-04-27 2020-05-07 Mikasa Sangyo Co., Ltd. Concrete vibrator with idling mode
DE102018118552A1 (de) 2018-07-31 2020-02-06 Wacker Neuson Produktion GmbH & Co. KG Tragvorrichtung mit Energiespeicher und elektrischem Umformer
US20210148126A1 (en) * 2019-11-20 2021-05-20 Milwaukee Electric Tool Corporation Concrete vibrator
CN111946065A (zh) * 2020-08-10 2020-11-17 中交二航武汉港湾新材料有限公司 通过电流变化智能监控混凝土振捣的装置及方法

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Publication number Publication date
DE102022118542A1 (de) 2024-01-25
US20240026695A1 (en) 2024-01-25
JP2024016002A (ja) 2024-02-06

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