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EP0027512A1 - Dispositif pour la surveillance du degré de compacité - Google Patents

Dispositif pour la surveillance du degré de compacité Download PDF

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Publication number
EP0027512A1
EP0027512A1 EP80104798A EP80104798A EP0027512A1 EP 0027512 A1 EP0027512 A1 EP 0027512A1 EP 80104798 A EP80104798 A EP 80104798A EP 80104798 A EP80104798 A EP 80104798A EP 0027512 A1 EP0027512 A1 EP 0027512A1
Authority
EP
European Patent Office
Prior art keywords
measured values
compaction
travel
measured
difference
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
EP80104798A
Other languages
German (de)
English (en)
Other versions
EP0027512B1 (fr
Inventor
Gülertan Dipl.-Ing. Vural
Uwe Blancke
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.)
Bomag GmbH and Co OHG
Bomag Menck GmbH
Original Assignee
Bomag GmbH and Co OHG
Bomag Menck 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 Bomag GmbH and Co OHG, Bomag Menck GmbH filed Critical Bomag GmbH and Co OHG
Priority to AT80104798T priority Critical patent/ATE2758T1/de
Publication of EP0027512A1 publication Critical patent/EP0027512A1/fr
Application granted granted Critical
Publication of EP0027512B1 publication Critical patent/EP0027512B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E01C19/288—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows adapted for monitoring characteristics of the material being compacted, e.g. indicating resonant frequency, measuring degree of compaction, by measuring values, detectable on the roller; using detected values to control operation of the roller, e.g. automatic adjustment of vibration responsive to such measurements

Definitions

  • the invention relates to a device for monitoring the degree of compaction in mobile soil compaction devices which have at least one vibrating compaction tool, a measured value relating to the active power of the vibrating compaction tool being known and storable as a measure of the degree of compaction.
  • This object is achieved according to the invention in that the measured values which are related to the active power in a known manner during forward travel and when the compression device is traveling backwards can be fed to separate memories assigned to the direction of travel and that the difference between measured values of successive transitions in the same direction of travel can be supplied in a manner known per se can be determined and displayed.
  • the invention is based on the knowledge that the effective power effectively plugged into the ground is subject to fluctuations even when the operating parameters are kept constant (oscillation mass, oscillation frequency, oscillation amplitude and compaction time) and also when the soil consistency remains constant, and that these fluctuations are based on an asymmetry of the compaction tool.
  • the magnitude of these fluctuations depends on the direction in which the compactor moves across the soil to be compacted to be led.
  • the memories assigned to the two different directions of travel each have a preliminary memory for the measured values of the new and a secondary memory for the measured values of the old transition.
  • the input of a new measured value deletes the measured value in the secondary memory and transfers the measured value in the preliminary memory to the secondary memory.
  • the difference between measured values of successive transitions in the same direction of travel is fed to a comparator which triggers a signal when the value falls below a predetermined minimum value. This indicates to the operator that further use of the device is no longer worthwhile and that further compaction may even loosen the soil.
  • a controller in such a way that the driving speed is established at which the difference between measured values of successive transitions in the same direction of travel approximately corresponds to the predetermined minimum value.
  • the difference between measured values of successive transitions in the same direction of travel is maximized in a manner known per se by varying the amplitude of the compacting tool, as described in DE-OS 25 54 013.
  • the measured value representative of the active power can be obtained in various ways.
  • the drive power can be measured via the torque and the speed and the reactive power consumed in the system itself can be subtracted from this by means of a feedforward control.
  • the reactive power can be measured in a simple manner by lifting the frame with the compression tools and then the power consumed in the system itself depending on the operation parameters, i.e. primarily as a function of the oscillation amplitude and the oscillation frequency.
  • the reactive power is then known for all possible operating parameters and can be deducted from the measured drive power by a computer.
  • the compactors are driven hydraulically.
  • the hydraulic pressure acts as a measured variable - here too, taking into account the amount of pressure consumed in the system itself as reactive power, the measurement of which can be carried out in the same way as described above.
  • the reactive power can of course be omitted, since it is constant and does not occur when the measured values are different.
  • the processing chain includes a measurement sensor, an amplifier, a differentiator, a low-pass filter, an adaptation amplifier, a voltage / frequency converter, comprises a divider, a counter, memory assigned to the direction of travel and a difference former.
  • a differentiator can be provided in the processing chain, which excludes instantaneous measurement value jumps, as far as these lie outside a predetermined change range, from the storage.
  • a transducer 1 generates a voltage that is, for example, proportional to the pressure in the hydraulic circuit of the hydraulically driven compression tool.
  • This voltage passes through a carrier frequency amplifier 2, a low-pass filter 3 and an adaptation amplifier 4 to a voltage / frequency converter 5.
  • the latter generates a pressure-proportional frequency, which is fed via a divider 6 to a main register or counter 7.
  • the divider 6 divides the number of pulses of the output frequency of the voltage / frequency converter 5 by a predetermined measuring time and thereby forms the desired integral mean value of the pressure.
  • a differentiator is expediently interposed between the carrier frequency amplifier 2 and the low-pass filter 3.
  • This differentiator checks the speed of the pressure change, for example the differential of the pressure over time dp / dt, and blocks the further processing of such measurement values that lie outside a predetermined slope range dp / dt until the disturbances have subsided; the measurement is therefore delayed accordingly.
  • the adjustment of the pressure measured by the transducer 1 from the pressure component responsible for the reactive power is carried out by applying a corresponding disturbance variable either directly behind the transducer or at another suitable point in the chain discussed so far. Only those measured values which are actually representative of the active power supplied to the ground are thus entered into the counter 7. This feedforward control can then be omitted if the operating parameters of the compression device remain the same during all transitions, so that the drive power is directly proportional to the compression performance.
  • the measured values are called up from the main register 7 either from a memory V 1 or from a memory R, depending on whether there is a forward drive or a reverse drive.
  • These memories act as pre-memories, each of which has a post- memory V 2 or . R 2 is assigned.
  • the pre-stores are also, like the post-stores, connected to a common difference generator 9.
  • a display device 10 is connected directly to the pre-memory and a further display device 11 to the difference former 9.
  • the function is as follows: It is assumed that the memories V 1 and V 2 are assigned to the forward drive, the memories R 1 and R 2 to the reverse drive of the compression device and that the first transition takes place in the forward direction. Furthermore, it is assumed that an integral averaging of the incoming signals takes place in the main register 7, such that only one signal is to be called up from the main register for each transition. Then the signal representing the first forward transition is stored in the memory V 1 . The second transition, which takes place in reverse, supplies its measured value to the memory R 1 . The third transition takes place again in the forward direction, ie it must be stored in the memory V 1 ; however, its input automatically triggers the previous transfer of the old measured value still in the memory V 1 to the secondary memory V 2 .
  • the difference in measured values between the first transition and the third transition is then formed in the difference generator 9 and possibly displayed in the display device 11.
  • the fourth transition takes place backwards, its measured value is therefore stored in the memory R1 , but the value of the second transition still contained therein is transferred to the secondary memory R 2 beforehand.
  • the difference generator 9 forms the measured value difference between the fourth and the second transition.
  • the process is repeated accordingly, with the added factor that the measured value in the secondary memory when a new one is entered Measured value is deleted.
  • a comparator 12 which compares the measured value difference determined by the difference generator 11 with a predetermined minimum value and triggers a signal when this minimum value is reached or fallen below.
  • This signal can also consist in driving a speed controller which increases the speed of the compression device until the difference in measured values corresponds approximately to the predetermined minimum value.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Architecture (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Machines (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
EP80104798A 1979-10-19 1980-08-14 Dispositif pour la surveillance du degré de compacité Expired EP0027512B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104798T ATE2758T1 (de) 1979-10-19 1980-08-14 Vorrichtung zur ueberwachung des verdichtungsgrades.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2942334A DE2942334C2 (de) 1979-10-19 1979-10-19 Vorrichtung zur Überwachung des Verdichtungsgrades
DE2942334 1979-10-19

Publications (2)

Publication Number Publication Date
EP0027512A1 true EP0027512A1 (fr) 1981-04-29
EP0027512B1 EP0027512B1 (fr) 1983-03-09

Family

ID=6083898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104798A Expired EP0027512B1 (fr) 1979-10-19 1980-08-14 Dispositif pour la surveillance du degré de compacité

Country Status (7)

Country Link
US (1) US4348901A (fr)
EP (1) EP0027512B1 (fr)
JP (1) JPS5945046B2 (fr)
AT (1) ATE2758T1 (fr)
CA (1) CA1147166A (fr)
DE (1) DE2942334C2 (fr)
ZA (1) ZA806385B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994025680A1 (fr) * 1993-04-29 1994-11-10 Geodynamik H. Thurner Ab Indice de compacite

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504176A (en) * 1982-06-02 1985-03-12 Byggnads-& Industriservice Ab Binab Method for compacting compactable soils by vibration
SE457807B (sv) * 1984-09-17 1989-01-30 Peter Arnberg Foerfarande och anordning foer maetning av vaegbanors baerighet
SE445566B (sv) * 1984-11-19 1986-06-30 Thurner Geodynamik Ab Forfarande for att uppskatta den packningsgrad som uppnas vid packning samt anordning for att meta packningsgrad for genomforandet av forfarandet
JPS63301768A (ja) * 1987-05-30 1988-12-08 Masanori Okumura 玉ねぎのみじん切り方法と装置
US5105650A (en) * 1990-03-08 1992-04-21 Gas Research Institute Monitoring compaction of backfill
DE69003530T2 (de) * 1990-05-28 1994-04-28 Caterpillar Paving Prod Einrichtung und Verfahren zur Überwachung der Schwingungsfrequenz einer Verdichtungsmaschine.
ES2045843T3 (es) * 1990-05-28 1994-01-16 Caterpillar Paving Prod Aparato y metodo para controlar una herramienta vibratoria.
US5426972A (en) * 1993-04-20 1995-06-27 Gas Research Institute Monitoring soil compaction
SE502079C2 (sv) * 1993-10-14 1995-08-07 Thurner Geodynamik Ab Styrning av en packningsmaskin med mätning av underlagets egenskaper
US5719338A (en) * 1995-10-24 1998-02-17 Ingersoll-Rand Company Method and apparatus for providing an indication of compaction in a vibration compaction vehicle
US5781874A (en) * 1995-11-28 1998-07-14 Ingersoll-Rand Company Control system for a compaction roller vibratory mechanism
ATE298082T1 (de) 1996-02-01 2005-07-15 Bbnt Solutions Llc Schermodulmessung von böden
US6912903B2 (en) * 1996-02-01 2005-07-05 Bbnt Solutions Llc Soil compaction measurement
US6244102B1 (en) * 1998-09-18 2001-06-12 Dynasens Ltd. Method and system for examination and optimal compaction of soil enbankments
DE19956943B4 (de) * 1999-11-26 2020-03-19 Bomag Gmbh Vorrichtung zur Kontrolle der Verdichtung bei Vibrationsverdichtungsgeräten
DE10053446B4 (de) * 2000-10-27 2006-03-02 Wacker Construction Equipment Ag Lenkbare Vibrationsplatte und fahrbares Vibrationsplattensystem
US7110884B2 (en) * 2001-05-15 2006-09-19 Earthworks Solutions, Inc. Methods in the engineering design and construction of earthen fills
AU6160901A (en) * 2001-05-15 2001-11-26 Industry Advocates Inc Monitoring fill soil via compactor rolling resistance
US20050129467A1 (en) * 2002-07-01 2005-06-16 Compaction Technology (Soil) Ltd. Drop mass compaction of soil
US20080004809A1 (en) * 2002-09-16 2008-01-03 Earthwork Solutions, Inc. Engineering design and construction of earthen fills
US20120078515A1 (en) * 2002-09-16 2012-03-29 Earthwork Solutions, Llc Engineering design and construction of earthen fills
US7073374B2 (en) * 2003-07-30 2006-07-11 Bbnt Solutions Llc Soil compaction measurement on moving platform
US20090208296A1 (en) * 2004-11-29 2009-08-20 Compaction Technology (Proprietary) Ltd. Drop mass soil compaction apparatus
DE102005022627A1 (de) * 2005-05-11 2006-11-16 Ammann Verdichtung Gmbh Bodenverdichtungsgerät
US20080072656A1 (en) * 2006-03-18 2008-03-27 Conner Charles C Displacement instrument
US8116950B2 (en) * 2008-10-07 2012-02-14 Caterpillar Inc. Machine system and operating method for compacting a work area
RU2521977C2 (ru) * 2012-04-11 2014-07-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский государственный строительный университет" (ФГБОУ ВПО "МГСУ") Устройство автоматического управления рабочим механизмом грунтоуплотняющей машины
DE102014203585A1 (de) * 2014-02-27 2015-08-27 Hamm Ag Verfahren zur Bestimmung eines durch eine Oszillationsbewegung einer Verdichterwalze hervorgerufenen Schlupfzustandes der Verdichterwalze eines Bodenverdichters
US9207157B2 (en) 2014-03-17 2015-12-08 Caterpillar Paving Products Inc. System and method for determining a state of compaction
US10196791B1 (en) * 2017-11-27 2019-02-05 Caterpillar Paving Products Inc. Compacting machine and method of monitoring compacting member of compacting machine
AT521850A1 (de) * 2018-10-24 2020-05-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Gleisbaumaschine und Verfahren zum Unterstopfen von Schwellen eines Gleises
RU2722186C1 (ru) * 2019-12-09 2020-05-28 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тихоокеанский государственный университет" Устройство для контроля эффективности процесса уплотнения асфальтобетонной смеси дорожным катком

Citations (2)

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Publication number Priority date Publication date Assignee Title
DE2052745A1 (de) * 1970-10-28 1972-05-04 Losenhausen Maschinenbau Ag Vorrichtung zur Messung der Setzung einer Bodenoberfläche
DE2057279A1 (de) * 1970-11-21 1972-06-15 Losenhausen Maschb Ag Bodenverdichtungsgeraet

Family Cites Families (3)

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AT346888B (de) * 1975-01-28 1978-11-27 Plasser Bahnbaumasch Franz Verfahren und einrichtung zur feststellung des zustandes bzw. der dichte von grobkoernigem gut, insbesondere eines gleis-schotterbettes
DE2554013C3 (de) * 1975-12-01 1984-10-25 Koehring Gmbh - Bomag Division, 5407 Boppard Verfahren zur dynamischen Bodenverdichtung
US4103554A (en) * 1976-03-12 1978-08-01 Thurner Heinz F Method and a device for ascertaining the degree of compaction of a bed of material with a vibratory compacting device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2052745A1 (de) * 1970-10-28 1972-05-04 Losenhausen Maschinenbau Ag Vorrichtung zur Messung der Setzung einer Bodenoberfläche
DE2057279A1 (de) * 1970-11-21 1972-06-15 Losenhausen Maschb Ag Bodenverdichtungsgeraet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994025680A1 (fr) * 1993-04-29 1994-11-10 Geodynamik H. Thurner Ab Indice de compacite
US5942679A (en) * 1993-04-29 1999-08-24 Geodynamik Ht Aktiebolag Compaction index

Also Published As

Publication number Publication date
JPS5667011A (en) 1981-06-05
DE2942334A1 (de) 1981-04-30
US4348901A (en) 1982-09-14
EP0027512B1 (fr) 1983-03-09
CA1147166A (fr) 1983-05-31
JPS5945046B2 (ja) 1984-11-02
ATE2758T1 (de) 1983-03-15
DE2942334C2 (de) 1984-06-28
ZA806385B (en) 1981-10-28

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