EP1334234B1 - Soil compacting device comprising a vibration generator, and method for controlling the vibration generator - Google Patents
Soil compacting device comprising a vibration generator, and method for controlling the vibration generator Download PDFInfo
- Publication number
- EP1334234B1 EP1334234B1 EP01985279A EP01985279A EP1334234B1 EP 1334234 B1 EP1334234 B1 EP 1334234B1 EP 01985279 A EP01985279 A EP 01985279A EP 01985279 A EP01985279 A EP 01985279A EP 1334234 B1 EP1334234 B1 EP 1334234B1
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- Prior art keywords
- oscillation
- amplitude
- drive
- exciter
- frequency
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- 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 soil compaction device with a ground contact element acting vibrator and a method for controlling the vibration exciter.
- They are soil compacting devices, for example vibrating plates or rollers, in which a ground-compacting ground contact element, like a plate or a roll bandage, by one of a Vibration generator generated vibration can be applied.
- the compaction of the soil is done by one or more times driving over with the soil compacting device, which increases the strength of the soil and thus also changes its vibration behavior.
- the soil compacting device begin to "jump" by the ground contact plate or drum bandage lift off the ground after each contact with the ground. This poses not just a waste of energy, but is for those already occurred compaction disadvantageous, since it leads to local soil loosening can come. Jumping of the soil compaction device also results to a considerable load of the device leading operator.
- WO-A-98-17865 and WO-A-95-10664 are vibratory compactors known in which on the operating state of jumping through change the vibration generated by the vibration generator automatically reacts becomes.
- the frequency of the vibration exciter to the previously determined Adapted soil properties.
- the soil condition by elaborate evaluation of various Measured signals determined.
- this requires the movement the ground contact element, which is part of a vibrating lower mass is to determine.
- the set frequency and the exact position of the vibration exciter can be measured.
- FIG. 3 shows a known vibration plate serving as a soil compaction device, which can be guided on a drawbar 1 by an operator.
- One to an upper mass belonging drive 2 drives one to a lower mass belonging to vibration exciter 3, which is a ground contact plate. 4 generates acting vibration.
- the vibration generator 3 acts It is usually a single- or two-wave exciter, in which corresponding to one or two waves one or more imbalance masses are distributed.
- the structure of such a vibration plate is known, so that a further description is unnecessary.
- the invention is based on the object, a soil compacting device with a vibration exciter and a method for regulating the Specify vibration exciter, in which an optimal utilization of the ensured by the drive power is guaranteed.
- the object is achieved by a soil compacting device according to claim 1 and by a method according to claim 11.
- the idea underlying the invention consists in each case one Control of the amplitude and frequency of the by the vibration exciter provide vibration generated and realized by simple means. Above all, in the interaction of the two regulations, it is possible the available drive power, for example a drive motor, optimally exploit, without that the unwanted "jumping" the Soil compaction device occurs.
- the regulation of the amplitude is based on the fact that whenever a Jumping a ground contact element is detected, the amplitude is reduced becomes.
- the check whether the ground contact element jumps, takes place continuously or regularly during a given timetable. After a Changing the amplitude thus takes place again determining the Vibration state of the ground contact element.
- the amplitude will not be about kept constant at the existing value, but again - but with lower gradient - increased. Consequently, the amplitude changes constantly, namely either by a significant reduction when jumping has been detected, or by a slight increase if no Jumping has been found. This ensures that the soil compacting device always in the border area between jumping and non-jumping is moved.
- the change in vibration amplitude can be continuous and continuous be carried out, wherein preferably the reduction of Vibration amplitude with a stronger gradient occurs as the enlargement.
- the clock can also be set so short that a quasi-continuous Change the oscillation amplitude sets.
- the inventive control of the oscillation frequency is based on the Thoughts, the given, for example, delivered by a drive motor Drive power for soil compaction always optimal, that is maximum exploit.
- the delivered to the vibration exciter Drive power determined by a power determination device and with a setpoint, namely the predetermined value for an optimal drive power compared, wherein the frequency control device the determined actual drive power in the range of the predetermined value by maintaining the frequency generated by the vibration exciter adapts.
- Figure 1 shows a block diagram of the structure of a control according to the invention for the vibration exciter of a soil compaction device.
- the Control consists essentially of two mutually parallel Components, namely an amplitude control device 5 and a Frequency control device 6.
- Part of the amplitude control device 5 is a detection device 8, with which it can be determined whether the ground contact element 4 is jumping, that means lifting off the ground or not.
- This operating state of "jumping” can be prepared, for example, by known methods as described in WO-A-98-17865 or WO-A-95-10664.
- a detection device in the one with respect to the ground contact element elastically movable Detection mass is provided, wherein the movement of the detection mass is measured by a measuring device. If the movement, in particular the oscillation amplitude of the detection mass a predetermined Value exceeds, this may be due to jumping of the ground contact element excessive impact energy are interpreted.
- the information as to whether or not the ground contact element 4 bounces is given by the detection device 8 is delivered to a control unit 9.
- the control unit 9 evaluates the jump information from the detection device 8 and controls an adjusting device 10 for adjusting the oscillation amplitude at the vibration generator 3 according to predetermined rules at.
- the control algorithm comprises two control measures. According to a first The regular measure is the oscillation amplitude incrementally by a first Amplitude difference k1 reduced when the detection device 8 a Special vibration state, namely a jumping of the ground contact element 4 has detected.
- control unit 9 For timing of these control measures is in or on the control unit 9 provides a timer for generating a timing clock.
- a time clock for example, amount to a fraction of a second can, is the control unit 9, the signal of the detection device. 8 evaluated and a corresponding action by driving the actuator 10 causes. This process is repeated in the next time cycle.
- the result of this control algorithm is that the oscillation amplitude permanently, that is changed in every bar. If the oscillation amplitude is reduced by the first amplitude difference k1 is and then still a jumping is detected, is a causes a further reduction by the first amplitude difference k1. kick on the other hand, no more jumping, the amplitude is not diminished, but the second smaller compared to the first amplitude difference k1 Amplitude difference k2 increases, so that an interplay of reduction and increasing the amplitude. This will achieve that the soil compaction device always in the border area between Jumping and not jumping is being moved.
- FIG. 2 shows in a diagram the oscillation amplitude over the time course.
- a maximum amplitude is set. In the present case is detected immediately after starting, that the ground contact element 4 has started to jump, so that the oscillation amplitude around the Value k1 (first amplitude difference) is reduced. Subsequently, will determined that the ground contact element 4 is no longer jumping, so that subsequently in several steps (in Figure 2 in three steps) the amplitude is increased by the second amplitude difference k2, until again a jumping is detected, etc.
- the soil compacting device passes over obviously a soil that has only limited impact energy can record.
- the oscillation amplitude must be twice be diminished and finally takes only a comparatively small Value. Thereafter, a recovery with associated increase takes place the oscillation amplitude instead.
- the amplitude control according to the invention makes it possible for the soil compacting device the ground each with the greatest possible amplitude compacted, wherein the amplitude control device 5 is compared to the State of the art has a considerably simplified structure.
- the underlying idea of the frequency control device is that always the existing or predetermined drive power completely for Soil compaction is to be exploited.
- a component of the frequency control device 6 is a power determination device 11, with that of the drive 2 to the vibration exciter 3 delivered power can be measured.
- a control unit 12 the measured actual drive power with a predetermined setpoint compared.
- the frequency of the vibration generator 3 via an adjusting device 13 increases or reduced in the opposite case.
- the power determination device 11 can be constructed in various ways be. Assuming that it is the drive 2 to a Engine, for example, the engine speed and the engine torque be measured. If, on the other hand, the drive 2 is one Hydraulic unit and the vibration generator 3 is hydraulically driven, can also determine the torque in the hydraulic line prevailing pressure to be used. As far as the vibration generator of an electric motor is driven, is also a measurement of electrical Characteristics possible.
- the performance curve of the engine that is, the relationship between the engine power and the engine speed to determine the delivered Power, ie the actual drive power for the vibration exciter 3 used.
- the performance characteristic of the engine is generally known and makes a clear connection between a given Engine power and a motor speed. Thus, the from the Motor delivered to the vibration generator 3 drive power alone with Help determine the relatively easy to measure speed of the drive motor 2.
- a regulation of the frequency of the vibration generator 3 for constant maintenance the drive power can then be compared by a comparison measured engine speed and the predetermined target drive power perform assigned target engine speed.
- the Frequency of the vibrator 3 that is, the speed of the in the Vibration generator 3 provided imbalance waves reduced, so that the Engine is relieved and increase its speed to the predetermined value can. If, however, the actual engine speed is greater than the desired speed, This means that the engine is loaded too weak, so the speed the imbalance waves in the vibration exciter 3 is increased to the fully exploitable by the engine available drive power.
- the adjustment of the frequency of the vibrator 3, that is the change the speed of the vibration generator 3 arranged unbalance shafts is performed by the adjusting device 13.
- the adjusting device 13 can be used on known construction elements become.
- a variable or a variable speed hydraulic motor. at mechanical power transmission are bevel gearboxes, such as Example Heynau transmission or PIV transmission possible, where either torque is transferred via a friction ring or via push chains as well as friction gear (PK gearbox).
- the amplitude control device 5 and the frequency device 6 reach taken separately, each already a better utilization of the available standing drive power. Insofar as they work together in parallel, the efficiency is increased again.
- the control devices 5, 6 are characterized by simple construction, low Measuring effort and by the control devices 5, 6 caused efficient Soil compaction with maximum power.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Road Paving Machines (AREA)
Description
Die Erfindung betrifft eine Bodenverdichtungsvorrichtung mit einem ein Bodenkontaktelement beaufschlagenden Schwingungserreger sowie ein Verfahren zum Regeln des Schwingungserregers.The invention relates to a soil compaction device with a ground contact element acting vibrator and a method for controlling the vibration exciter.
Es sind Bodenverdichtungsvorrichtungen, zum Beispiel Vibrationsplatten oder -walzen bekannt, bei denen ein den Boden verdichtendes Bodenkontaktelement, wie eine Platte oder eine Walzenbandage, durch eine von einem Schwingungserreger erzeugte Schwingung beaufschlagt werden.They are soil compacting devices, for example vibrating plates or rollers, in which a ground-compacting ground contact element, like a plate or a roll bandage, by one of a Vibration generator generated vibration can be applied.
Die Verdichtung des Bodens erfolgt durch ein- oder mehrmaliges Überfahren mit der Bodenverdichtungsvorrichtung, wodurch sich die Festigkeit des Bodens und damit auch sein Schwingungsverhalten ändert. Wenn der Boden bereits stark verdichtet ist und die von der Bodenverdichtungsvorrichtung abgegebene Verdichtungsleistung groß ist, kann die Bodenverdichtungsvorrichtung beginnen zu "springen", indem die Bodenkontaktplatte bzw. -walzenbandage nach jedem Bodenkontakt wieder vom Boden abhebt. Dies stellt nicht nur eine Energieverschwendung dar, sondern ist auch für die bereits erfolgte Verdichtung nachteilig, da es zu lokalen Auflockerungen des Bodens kommen kann. Ein Springen der Bodenverdichtungsvorrichtung führt außerdem zu einer erheblichen Belastung des die Vorrichtung führenden Bedieners.The compaction of the soil is done by one or more times driving over with the soil compacting device, which increases the strength of the soil and thus also changes its vibration behavior. When the ground already highly compressed and that of the soil compacting device delivered compacting power is large, the soil compacting device begin to "jump" by the ground contact plate or drum bandage lift off the ground after each contact with the ground. This poses not just a waste of energy, but is for those already occurred compaction disadvantageous, since it leads to local soil loosening can come. Jumping of the soil compaction device also results to a considerable load of the device leading operator.
Aus der WO-A-98-17865 und der WO-A-95-10664 sind Vibrationsverdichter bekannt, bei denen auf den Betriebszustand des Springens durch Veränderung der vom Schwingungserreger erzeugten Schwingung automatisch reagiert wird.From WO-A-98-17865 and WO-A-95-10664 are vibratory compactors known in which on the operating state of jumping through change the vibration generated by the vibration generator automatically reacts becomes.
Bei den aus dem Stand der Technik bekannten Geräten bzw. Verfahren wird üblicherweise die Frequenz des Schwingungserregers an die vorher ermittelten Bodeneigenschaften angepaßt. Hierfür wird zum Beispiel bei der WO-A-98-17865 der Bodenzustand durch aufwendige Auswertung verschiedener Messsignale ermittelt. Im besonderen ist es hierfür erforderlich, die Bewegung des Bodenkontaktelements, das Bestandteil einer schwingenden Untermasse ist, zu bestimmen. Weiterhin müssen die eingestellte Frequenz und die genaue Stellung des Schwingungserregers gemessen werden.In the known from the prior art devices or methods Usually the frequency of the vibration exciter to the previously determined Adapted soil properties. For this purpose, for example, in WO-A-98-17865 the soil condition by elaborate evaluation of various Measured signals determined. In particular, this requires the movement the ground contact element, which is part of a vibrating lower mass is to determine. Furthermore, the set frequency and the exact position of the vibration exciter can be measured.
Darüber hinaus sind Bodenverdichtungsvorrichtungen bekannt, bei denen die Amplitude der vom Schwingungserreger erzeugten Schwingung derart verkleinert wird, dass kein Springen der Bodenverdichtungsvorrichtung mehr auftreten kann. Durch die Begrenzung der Amplitude bei vorgegebener Frequenz kann allerdings nicht mehr die gesamte zur Verfügung stehende Antriebsleistung, für die der Schwingungserreger ausgelegt ist, zur Verdichtung des Bodens genutzt werden. Eine entsprechend geringere Arbeitseffizienz ist die Folge.In addition, soil compacting devices are known in which the amplitude of the vibration generated by the vibration exciter such is reduced, that no jumping of the soil compacting device can occur more. By limiting the amplitude at a given However, frequency can not be the entire available Drive power for which the vibration exciter is designed for compression of the soil. A correspondingly lower work efficiency is the consequence.
Figur 3 zeigt eine bekannte als Bodenverdichtungsvorrichtung dienende Vibrationsplatte,
die an einer Deichsel 1 von einem Bediener führbar ist. Ein
zu einer Obermasse gehörender Antrieb 2 treibt einen zu einer Untermasse
gehörenden Schwingungserreger 3 an, der eine eine Bodenkontaktplatte 4
beaufschlagende Schwingung erzeugt. Bei dem Schwingungserreger 3 handelt
es sich üblicherweise um einen Ein- oder Zweiwellenerreger, bei dem
entsprechend auf einer oder zwei Wellen eine oder mehrere Unwuchtmassen
verteilt sind. Der Aufbau einer derartigen Vibrationsplatte ist bekannt, so
dass sich eine weitere Beschreibung erübrigt.FIG. 3 shows a known vibration plate serving as a soil compaction device,
which can be guided on a drawbar 1 by an operator. One
to an upper
In ähnlicher, bekannter Weise sind auch als Bodenverdichtungsvorrichtungen dienende Vibrationswalzen aufgebaut.In a similar, known manner are also as soil compacting devices serving vibration rollers built.
Der Erfindung liegt die Aufgabe zugrunde, eine Bodenverdichtungsvorrichtung mit einem Schwingungserreger sowie ein Verfahren zum Regeln des Schwingungserregers anzugeben, bei denen eine optimale Ausnutzung der vom Antrieb bereitgestellten Leistung gewährleistet ist.The invention is based on the object, a soil compacting device with a vibration exciter and a method for regulating the Specify vibration exciter, in which an optimal utilization of the ensured by the drive power is guaranteed.
Erfindungsgemäß wird die Aufgabe durch eine Bodenverdichtungsvorrichtung
gemäß Anspruch 1 sowie durch ein Verfahren gemäß Anspruch 11 gelöst.According to the invention, the object is achieved by a soil compacting device
according to claim 1 and by a method according to
Vorteilhafte Weiterentwicklungen der Erfindung sind in den abhängigen Ansprüchen definiert. Advantageous developments of the invention are defined in the dependent claims Are defined.
Der der Erfindung zugrunde liegende Gedanke besteht darin, jeweils eine Regelung für die Amplitude und die Frequenz der durch den Schwingungserreger erzeugten Schwingung vorzusehen und mit einfachen Mitteln zu realisieren. Vor allem im Zusammenspiel der beiden Regelungen ist es möglich, die zur Verfügung stehende Antriebsleistung, zum Beispiel eines Antriebsmotors, optimal auszunutzen, ohne dass das unerwünschte "Springen" der Bodenverdichtungsvorrichtung eintritt.The idea underlying the invention consists in each case one Control of the amplitude and frequency of the by the vibration exciter provide vibration generated and realized by simple means. Above all, in the interaction of the two regulations, it is possible the available drive power, for example a drive motor, optimally exploit, without that the unwanted "jumping" the Soil compaction device occurs.
Bei der erfindungsgemäßen Kombination von Amplituden- und Frequenzregelung wird dies dadurch ermöglicht, daß die Schwingungsamplitude stets im Grenzbereich zum Springen gehalten wird. Ändert sich dieser Grenzbereich und macht es zum Beispiel erforderlich, daß die Schwingungsamplitude vermindert werden muß, führt die Frequenzregelung die Schwingungsfrequenz nach, indem sie sie entsprechend erhöht, um die durch die Verminderung der Schwingungsamplitude freiwerdende Antriebsenergie in Form einer höheren Frequenz zu nutzen. Dadurch kann die Antriebsenergie weitgehend vollständig zur Bodenverdichtung genutzt werden, ohne dass die Bodenverdichtungsvorrichtung beginnt zu springen.In the inventive combination of amplitude and frequency control this is made possible by the fact that the vibration amplitude always is held in the border area for jumping. This boundary area changes and, for example, it requires that the oscillation amplitude must be reduced, the frequency control leads the oscillation frequency by increasing it accordingly, by reducing it the vibration amplitude released drive energy in the form of a higher frequency. As a result, the drive energy largely be fully used for soil compaction, without the soil compacting device starts to jump.
Die Regelung der Amplitude beruht darauf, dass immer dann, wenn ein Springen eines Bodenkontaktelements erkannt wird, die Amplitude reduziert wird. Die Überprüfung, ob das Bodenkontaktelement springt, erfolgt kontinuierlich oder regelmäßig im Rahmen eines vorgegebenen Zeittakts. Nach einer Änderung der Amplitude erfolgt somit ein erneutes Bestimmen des Schwingungszustandes des Bodenkontaktelements. Wenn das Bodenkontaktelement immer noch springt, erfolgt eine weitere Reduzierung der Amplitude. Wenn jedoch kein Springen erkannt wird, wird die Amplitude nicht etwa auf dem bestehenden Wert konstant gehalten, sondern wieder - jedoch mit geringerem Gradienten - vergrößert. Folglich ändert sich die Amplitude ständig, nämlich entweder durch eine deutliche Reduzierung, wenn ein Springen festgestellt worden ist, oder durch eine geringfügige Erhöhung, wenn kein Springen festgestellt worden ist. Hierdurch wird erreicht, dass die Bodenverdichtungsvorrichtung stets im Grenzbereich zwischen Springen und Nichtspringen bewegt wird.The regulation of the amplitude is based on the fact that whenever a Jumping a ground contact element is detected, the amplitude is reduced becomes. The check whether the ground contact element jumps, takes place continuously or regularly during a given timetable. After a Changing the amplitude thus takes place again determining the Vibration state of the ground contact element. When the ground contact element still jumps, there is a further reduction of the amplitude. However, if no jumping is detected, the amplitude will not be about kept constant at the existing value, but again - but with lower gradient - increased. Consequently, the amplitude changes constantly, namely either by a significant reduction when jumping has been detected, or by a slight increase if no Jumping has been found. This ensures that the soil compacting device always in the border area between jumping and non-jumping is moved.
Die Änderung der Schwingungsamplitude kann kontinuierlich und fortlaufend durchgeführt werden, wobei vorzugsweise die Verkleinerung der Schwingungsamplitude mit stärkerem Gradienten erfolgt als die VergröJierung. Alternativ dazu kann insbesondere bei einer digitalen Regelung von einem Zeitglied ein Zeittakt vorgegeben werden, währenddem von der Detektionseinrichtung der Schwingungszustand des Bodenkontaktelements bestimmt wird. Wenn der Sonderschwingungszustand erkannt worden ist, läßt sich die Schwingungsamplitude inkremental um eine erste Amplitudendifferenz verkleinern. Wenn in dem Zeittakt jedoch kein Sonderbetriebszustand erkannt worden ist, wird die Schwingungsamplitude inkremental um eine zweite, vorzugsweise geringere Amplitudendifferenz vergrößert. Der Zeittakt kann auch derart kurz eingestellt werden, daß sich eine quasi kontinuierliche Änderung der Schwingungsamplitude einstellt.The change in vibration amplitude can be continuous and continuous be carried out, wherein preferably the reduction of Vibration amplitude with a stronger gradient occurs as the enlargement. Alternatively, in particular in a digital control of a Timer are given a timing while, by the detection device determines the vibration state of the ground contact element becomes. If the special mode has been detected, leave the oscillation amplitude incrementally by a first amplitude difference out. However, if in the timing no special operating state has been recognized, the oscillation amplitude is incrementally by one second, preferably smaller amplitude difference increases. The clock can also be set so short that a quasi-continuous Change the oscillation amplitude sets.
Die erfindungsgemäße Regelung der Schwingungsfrequenz beruht auf dem Gedanken, die vorgegebene, zum Beispiel von einem Antriebsmotor abgegebene Antriebsleistung zur Bodenverdichtung stets optimal, das heißt maximal auszunutzen. Zu diesem Zweck wird die an den Schwingungserreger abgegebene Antriebsleistung durch eine Leistungsbestimmungseinrichtung bestimmt und mit einem Sollwert, nämlich dem vorher festgelegten Wert für eine optimale Antriebsleistung verglichen, wobei die Frequenzregeleinrichtung die ermittelte Ist-Antriebsleistung im Bereich des vorgegebenen Werts hält, indem sie die von dem Schwingungserreger erzeugte Frequenz entsprechend anpaßt.The inventive control of the oscillation frequency is based on the Thoughts, the given, for example, delivered by a drive motor Drive power for soil compaction always optimal, that is maximum exploit. For this purpose, the delivered to the vibration exciter Drive power determined by a power determination device and with a setpoint, namely the predetermined value for an optimal drive power compared, wherein the frequency control device the determined actual drive power in the range of the predetermined value by maintaining the frequency generated by the vibration exciter adapts.
Auch wenn die Amplitudenregelung und die Frequenzregelung jeweils schon alleine für eine deutliche Verbesserung bekannter Regeleinrichtungen und insbesondere für eine Steigerung der Arbeitseffizienz sorgen, ist durch eine Kopplung der beiden Regelungen eine weitere Verbesserung möglich.Even if the amplitude control and the frequency control each already alone for a significant improvement of known control devices and In particular, to ensure an increase in work efficiency, is by a Coupling the two schemes further improvement possible.
Diese und weitere Vorteile und Merkmale der Erfindung werden nachfolgend anhand bevorzugter Ausführungsformen unter Zuhilfenahme der begleitenden Figuren näher erläutert. Es zeigen:
- Figur 1
- ein Blockdiagramm mit der erfindungsgemäßen Regeleinrichtung für eine Bodenverdichtungsvorrichtung;
-
Figur 2 - ein Beispiel für die Regelungsmaßnahmen der erfindungsgemäßen Amplitudenregelung; und
-
Figur 3 - schematisch den Aufbau einer bekannten, als Bodenverdichtungsvorrichtung dienenden Vibrationsplatte.
- FIG. 1
- a block diagram with the inventive control device for a soil compaction device;
- FIG. 2
- an example of the control measures of the amplitude control according to the invention; and
- FIG. 3
- schematically the structure of a known, serving as soil compaction vibration plate.
Figur 1 zeigt als Blockdiagramm den Aufbau einer erfindungsgemäßen Regelung
für den Schwingungserreger einer Bodenverdichtungsvorrichtung. Die
Regelung besteht im wesentlichen aus zwei parallel zueinander angeordneten
Komponenten, nämlich einer Amplitudenregeleinrichtung 5 und einer
Frequenzregeleinrichtung 6.Figure 1 shows a block diagram of the structure of a control according to the invention
for the vibration exciter of a soil compaction device. The
Control consists essentially of two mutually parallel
Components, namely an
Beide Regeleinrichtungen 5, 6 beeinflussen einen Betriebszustand 7 der Bodenverdichtungsvorrichtung,
der wiederum im wesentlichen durch die - bereits
in Zusammenhang mit Figur 3 beschriebenen - Elemente Antrieb 2,
Schwingungserreger 3 und Bodenkontaktelement 4 repräsentiert wird.Both
Im folgenden wird der Aufbau der Amplitudenregeleinrichtung 5 sowie ihr
Wirkprinzip erläutert.In the following, the structure of the
Bestandteil der Amplitudenregeleinrichtung 5 ist eine Detektionseinrichtung
8, mit der festgestellt werden kann, ob das Bodenkontaktelement 4 springt,
das heißt vom Boden abhebt oder nicht. Dieser Betriebszustand des "Springens"
kann zum Beispiel mit Hilfe von bekannten Verfahren, wie in der WO-A-98-17865
oder der WO-A-95-10664 erkannt werden.Part of the
Alternativ dazu ist aus der DE-A-100 19 806 eine Detektionseinrichtung bekannt, bei der eine gegenüber dem Bodenkontaktelement elastisch bewegliche Detektionsmasse vorgesehen ist, wobei die Bewegung der Detektionsmasse durch eine Messeinrichtung gemessen wird. Wenn die Bewegung, insbesondere die Schwingungsamplitude der Detektionsmasse einen vorgegebenen Wert übersteigt, kann dies als Springen des Bodenkontaktelements aufgrund überhöhter Schlagenergie interpretiert werden.Alternatively, from DE-A-100 19 806 a detection device is known, in the one with respect to the ground contact element elastically movable Detection mass is provided, wherein the movement of the detection mass is measured by a measuring device. If the movement, in particular the oscillation amplitude of the detection mass a predetermined Value exceeds, this may be due to jumping of the ground contact element excessive impact energy are interpreted.
Die Information, ob das Bodenkontaktelement 4 springt oder nicht, wird von
der Detektionseinrichtung 8 an eine Regeleinheit 9 abgegeben.The information as to whether or not the
Die Regeleinheit 9 wertet die Sprunginformation von der Detektionseinrichtung
8 aus und steuert eine Stelleinrichtung 10 zum Einstellen der Schwingungsamplitude
am Schwingungserreger 3 entsprechend vorgegebener Regeln
an. The
Der Regelalgorithmus umfasst zwei Regelmaßnahmen. Gemäß einer ersten
Regelmaßnahme wird die Schwingungsamplitude inkremental um eine erste
Amplitudendifferenz k1 verkleinert, wenn die Detektionseinrichtung 8 einen
Sonderschwingungszustand, nämlich ein Springen des Bodenkontaktelements
4 erkannt hat.The control algorithm comprises two control measures. According to a first
The regular measure is the oscillation amplitude incrementally by a first
Amplitude difference k1 reduced when the detection device 8 a
Special vibration state, namely a jumping of the
Wenn dagegen von der Detektiontseinrichtung 8 erkannt worden ist, dass
kein Sonderschwingungszustand, also kein Springen vorliegt, wird die
Schwingungsamplitude inkremental um eine zweite Amplitudendifferenz k2
vergrößert.If, on the other hand, it has been recognized by the
Zur zeitlichen Steuerung dieser Regelmaßnahmen ist in oder an der Regeleinheit
9 ein Zeitglied zum Erzeugen eines Zeittakts vorgesehen. Jeweils in
einem Zeittakt, der zum Beispiel den Bruchteil einer Sekunde betragen
kann, wird von der Regeleinheit 9 das Signal der Detektionseinrichtung 8
ausgewertet und eine entsprechende Maßnahme durch Ansteuern der Stelleinrichtung
10 veranlaßt. Dieser Prozeß wiederholt sich im nächsten Zeittakt.For timing of these control measures is in or on the
Im Ergebnis ergibt sich aus diesem Regelalgorithmus, dass die Schwingungsamplitude permanent, das heißt in jedem Takt geändert wird. Wenn die Schwingungsamplitude um die erste Amplitudendifferenz k1 verkleinert worden ist und danach immer noch ein Springen detektiert wird, wird eine erneute Verminderung um die erste Amplitudendiffernez k1 veranlaßt. Tritt dagegen kein Springen mehr auf, wird die Amplitude nicht mehr vermindert, sondern um die gegenüber der ersten Amplitudendifferenz k1 kleinere zweite Amplitudendifferenz k2 vergrößert, so dass sich ein Wechselspiel von Verkleinerung und Vergrößerung der Amplitude einstellt. Hierdurch wird erreicht, dass die Bodenverdichtungsvorrichtung stets im Grenzbereich zwischen Springen und Nichtspringen bewegt wird.The result of this control algorithm is that the oscillation amplitude permanently, that is changed in every bar. If the oscillation amplitude is reduced by the first amplitude difference k1 is and then still a jumping is detected, is a causes a further reduction by the first amplitude difference k1. kick on the other hand, no more jumping, the amplitude is not diminished, but the second smaller compared to the first amplitude difference k1 Amplitude difference k2 increases, so that an interplay of reduction and increasing the amplitude. This will achieve that the soil compaction device always in the border area between Jumping and not jumping is being moved.
Figur 2 zeigt in einem Diagramm die Schwingungsamplitude aufgetragen
über den zeitlichen Verlauf. Beim Starten der Bodenverdichtungsvorrichtung
wird zunächst eine maximale Amplitude eingestellt. Im vorliegenden Fall
wird unmittelbar nach dem Starten erkannt, dass das Bodenkontaktelement
4 zu springen begonnen hat, so dass die Schwingungsamplitude um den
Wert k1 (erste Amplitudendifferenz) vermindert wird. Anschließend wird
festgestellt, dass das Bodenkontaktelement 4 nicht mehr springt, so dass
nachfolgend in mehreren Schritten (in Figur 2 in drei Schritten) die Amplitude
jeweils um die zweite Amplitudendifferenz k2 vergrößert wird, bis erneut
ein Springen festgestellt wird, usw.FIG. 2 shows in a diagram the oscillation amplitude
over the time course. When starting the soil compaction device
First, a maximum amplitude is set. In the present case
is detected immediately after starting, that the
In dem mit "a" gekennzeichneten Zeitbereich überfährt die Bodenverdichtungsvorrichtung offensichtlich einen Boden, der nur noch bedingt Schlagenergie aufnehmen kann. Dadurch muß die Schwingungsamplitude zweimal vermindert werden und nimmt schließlich nur einen vergleichsweise geringen Wert ein. Danach findet eine Erholung mit damit verbundener Erhöhung der Schwingungsamplitude statt.In the time range marked "a", the soil compacting device passes over obviously a soil that has only limited impact energy can record. As a result, the oscillation amplitude must be twice be diminished and finally takes only a comparatively small Value. Thereafter, a recovery with associated increase takes place the oscillation amplitude instead.
Alternativ zu der beschriebenen inkrementalen Änderung der Schwingungsamplitude, welche sich insbesondere für digital aufgebaute Regelungen eignet, sind auch Regelalgorithmen mit einer kontinuierlichen Änderung der Schwingungsamplitude möglich. Entsprechend würde das Diagramm in Figur 2 keinen gestuften Verlauf, sondern einen wellenförmigen Verlauf einnehmen.Alternatively to the described incremental change of the oscillation amplitude, which in particular for digitally structured regulations are also control algorithms with a continuous change of Oscillation amplitude possible. Accordingly, the diagram in FIG 2 not a stepped course, but take a wave-shaped course.
Die erfindungsgemäße Amplitudenregelung ermöglicht es, dass die Bodenverdichtungsvorrichtung
den Boden jeweils mit größtmöglicher Amplitude
verdichtet, wobei die Amplitudenregeleinrichtung 5 einen gegenüber dem
Stand der Technik erheblich vereinfachten Aufbau aufweist.The amplitude control according to the invention makes it possible for the soil compacting device
the ground each with the greatest possible amplitude
compacted, wherein the
Eine alleinige Regelung der Amplitude würde allerdings weiterhin den Nachteil
mit sich bringen, dass die von dem Antrieb 2 zur Verfügung gestellte Antriebsleistung
nicht immer voll ausgenutzt würde. Daher umfaßt die in Figur
1 dargestellte erfindungsgemäße Gesamtregelung auch noch die Frequenzregeleinrichtung
6, die einen weiteren Regelkreis zur Anpassung der Frequenz
des Schwingungserregers 3 darstellt.However, a sole control of the amplitude would continue to be the disadvantage
bring with them that provided by the
Der der Frequenzregeleinrichtung zugrunde liegende Gedanke besteht darin, dass stets die vorhandene bzw. vorgegebene Antriebsleistung vollständig zur Bodenverdichtung ausgenutzt werden soll.The underlying idea of the frequency control device is that that always the existing or predetermined drive power completely for Soil compaction is to be exploited.
Dazu ist Bestandteil der Frequenzregeleinrichtung 6 eine Leistungsbestimmungseinrichtung
11, mit der die von dem Antrieb 2 an den Schwingungserreger
3 abgegebene Leistung gemessen werden kann.For this purpose, a component of the
In einer Regeleinheit 12 wird die gemessene Ist-Antriebsleistung mit einem
vorgegebenen Sollwert verglichen. Wenn die gemessene Antriebsleistung unter
dem Sollwert liegt, wird die Frequenz des Schwingungserregers 3 über
eine Stelleinrichtung 13 erhöht bzw. im umgekehrten Fall verringert.In a
Die Leistungsbestimmungseinrichtung 11 kann in verschiedener Weise aufgebaut
sein. Geht man davon aus, dass es sich bei dem Antrieb 2 um einen
Motor handelt, kann zum Beispiel die Motordrehzahl und das Motordrehmoment
gemessen werden. Handelt es sich dagegen bei dem Antrieb 2 um ein
Hydraulikaggregat und wird der Schwingungserreger 3 hydraulisch angetrieben,
kann zur Drehmomentbestimmung auch der in der Hydraulikleitung
herrschende Druck verwendet werden. Soweit der Schwingungserreger von
einem Elektromotor angetrieben wird, ist auch eine Messung elektrischer
Kenngrößen möglich.The
Bei einem besonders vorteilhaften Beispiel für die Ausführung der Erfindung
wird die Leistungskennlinie des Motors, das heißt der Zusammenhang zwischen
der Motorleistung und der Motordrehzahl zur Bestimmung der abgegebenen
Leistung, also der Ist-Antriebsleistung für den Schwingungserreger
3 herangezogen. Die Leistungskennlinie des Motors ist im allgemeinen bekannt
und stellt einen eindeutigen Zusammenhang zwischen einer vorgegebenen
Motorleistung und einer Motordrehzahl dar. Somit läßt sich die vom
Motor an den Schwingungserreger 3 abgegebene Antriebsleistung allein mit
Hilfe der relativ einfach zu messenden Drehzahl des Antriebsmotors 2 bestimmen.In a particularly advantageous example of the embodiment of the invention
is the performance curve of the engine, that is, the relationship between
the engine power and the engine speed to determine the delivered
Power, ie the actual drive power for the
Eine Regelung der Frequenz des Schwingungserregers 3 zur Konstanthaltung
der Antriebsleistung läßt sich dann durch einen Vergleich zwischen der
gemessenen Motordrehzahl und der der vorgegebenen Soll-Antriebsleistung
zugeordneten Soll-Motordrehzahl durchführen.A regulation of the frequency of the
Wenn die Ist-Motordrehzahl kleiner ist als die Soll-Motordrehzahl, wird die
Frequenz des Schwingungserregers 3, das heißt die Drehzahl der in dem
Schwingungserreger 3 vorgesehenen Unwuchtwellen verringert, so dass der
Motor entlastet wird und seine Drehzahl auf den vorgegebenen Wert ansteigen
kann. Ist dagegen die Ist-Motordrehzahl größer als die Soll-Drehzahl,
bedeutet das, dass der Motor zu schwach belastet wird, so dass die Drehzahl
der Unwuchtwellen in dem Schwingungserreger 3 vergrößert wird, um die
vom Motor zur Verfügung stellbare Antriebsleistung voll auszunutzen.If the actual engine speed is less than the target engine speed, the
Frequency of the
Die Verstellung der Frequenz des Schwingungserregers 3, das heißt die Änderung
der Drehzahl der im Schwingungserreger 3 angeordneten Unwuchtwellen
wird durch die Stelleinrichtung 13 durchgeführt. Bei der Realisierung
der Stelleinrichtung 13 kann auf bekannte Konstruktionselemente zurückgegriffen
werden. Zum Beispiel kann bei einer hydraulischen Leistungsübertragung
vom Antriebsmotor 2 zum Schwingungserreger 3 eine Verstellpumpe
oder ein Hydraulikmotor mit verstellbarer Drehzahl eingesetzt werden. Bei
mechanischer Leistungsübertragung sind Kegelscheibengetriebe, wie zum
Beispiel Heynau-Getriebe oder PIV-Getriebe möglich, bei denen entweder
über einen Reibring oder über Schubketten Drehmoment übertragen wird,
sowie auch Reibrad-Getriebe (PK-Getriebe).The adjustment of the frequency of the
Soweit eine elektrische Leistungsübertragung an den Schwingungserreger 3 erfolgt, ist eine Drehzahländerung mittels eines regelbaren Frequenzumrichters möglich.As far as an electrical power transmission to the vibration generator. 3 takes place, is a speed change by means of a variable frequency drive possible.
Die Amplitudenregeleinrichtung 5 und die Frequenzeinrichtung 6 erreichen
für sich genommen jeweils bereits eine bessere Ausnutzung der zur Verfügung
stehenden Antriebsleistung. Soweit sie parallel angeordnet zusammenwirken,
wird die Effizienz nochmals erhöht. Gegenüber dem Stand der Technik
zeichnen sich die Regeleinrichtungen 5, 6 durch einfachen Aufbau, geringen
Meßaufwand und eine durch die Regeleinrichtungen 5, 6 bewirkte effiziente
Bodenverdichtung mit maximaler Leistung aus.The
Claims (18)
- Ground compacting device havingwherein the frequency control device (6) comprises:a ground contacting element (4);an oscillation exciter (3) which influences the ground contacting element (4);a drive (2) for the oscillation exciter (3);an amplitude control device (5) for controlling the oscillation amplitude of oscillation generated by the oscillation exciter (3), wherein the amplitude control device (5) comprises:a detection device (8) for recognising a special oscillation state of the ground contacting element (4);an amplitude adjusting device (10) for adjusting the oscillation amplitude; andan amplitude control unit (9) for controlling the amplitude adjusting device (10) in such a manner that in a first control measure the oscillation amplitude can be reduced if the detection device (8) recognises a special oscillation state, and in a second control measure the oscillation amplitude can be increased if the detection device (8) does.not recognise a special oscillation state; and havinga frequency control device (6) for controlling the oscillation frequency of the oscillation generated by the oscillation exciter (3);characterised in that the amplitude control device (5) and the frequency control device (6) are disposed in parallel with each other, so that a reduction in the drive output for the oscillation exciter (3) as a result of the reduction in the oscillation amplitude instigated by the amplitude control device (5) can be compensated for by increasing the oscillation frequency and conversely.an output determining device (11) for determining a drive output provided by the drive (2) for the oscillation exciter (3);a frequency adjusting device (13) for adjusting the oscillation frequency; anda frequency control unit (12) for controlling the frequency adjusting device (13) in such a manner that the drive output determined by the output determining device (11) can be maintained at approximately a predetermined value;
- Ground compacting device as claimed in claim 1, characterised in that a reduction or increase in the oscillation amplitude can be performed continuously and ongoing in such a manner that the oscillation amplitude constantly changes.
- Ground compacting device as claimed in claim 1, characterised in thatthe amplitude control device (5) comprises a time member for generating a clock pulse; and thatthe amplitude adjusting device (10) can be controlled by the amplitude control unit (9) in such a manner that in the first control measure the oscillation amplitude can be reduced incrementally by a first amplitude difference (k1), if in one clock pulse the detection device (8) recognises the special oscillation state and in the second control measure the oscillation amplitude can be increased incrementally by a second amplitude difference (k2) if in one clock pulse the detection device (8) does not recognise a special oscillation state.
- Ground compacting device as claimed in claim 3, characterised in that a control measure can be performed in each clock pulse.
- Ground compacting device as claimed in claim 3 or 4, characterised in that the first amplitude difference (k1) is greater than the second amplitude difference (k2).
- Ground compacting device as claimed in any one of claims 1 to 5, characterised in that the special oscillation state is a state in which a parameter of oscillation of the ground contacting element (4) exceeds a predetermined value.
- Ground compacting device as claimed in any one of claims 1 to 6, characterised in that the amplitude control unit (9) is formed in such a manner that when the oscillation exciter (3) is started a maximum oscillation amplitude can be set.
- Ground compacting device as claimed in any one of claims 1 to 7, characterised in that the predetermined value for the drive output corresponds to an output which can be provided at a maximum for a long period by the drive (2).
- Ground compacting device as claimed in any one of claims 1 to 8, characterised in that the drive (2) comprises a motor and that the output determining device (11) comprises a rotational speed determining device for determining the rotational speed of the motor.
- Ground compacting device as claimed in any one of claims 1 to 8, characterised in that the drive (2) comprises a hydraulic pump and that the output determining device (11) comprises a pressure determining device for determining the hydraulic pressure generated by the hydraulic pump.
- Method for controlling an oscillation exciter (3) for a ground compacting device which for compacting ground comprises a ground contacting element (4) which is influenced by the oscillation exciter (3), wherein the oscillation exciter (3) is driven by a drive (2), having
a method for controlling the oscillation amplitude of the oscillation exciter (3), comprising the steps of:characterised in thatdetermining an oscillation state of the ground contacting element (4);recognising a special oscillation state of the ground contacting element (4);changing the oscillation amplitude in such a manner that the oscillation amplitude is reduced if a special oscillation state has been recognised and that the oscillation amplitude is increased if a special oscillation state has not been recognised; and comprising
a method for controlling the oscillation frequency of the oscillation exciter (3), comprising the steps of:determining a drive output provided by the drive (2);comparing the drive output with a predetermined value;changing the oscillation frequency in such a manner that the drive output corresponds approximately to the predetermined value;the method for controlling the oscillation amplitude of the oscillation exciter (3) and the method for controlling the oscillation frequency of the oscillation exciter (3) are performed in parallel. - Method as claimed in claim 11, characterised in that the change in the oscillation amplitude is performed continuously and ongoing in such a manner that the oscillation amplitude constantly changes.
- Method as claimed in claim 11, characterised in that the change in the oscillation amplitude is performed in such a manner that the oscillation amplitude is reduced by a first amplitude difference (k1) if the special oscillation state has been recognised and that the oscillation amplitude is increased by a second amplitude difference (k2) if a special oscillation state has not been recognised.
- Method as claimed in claim 13, characterised in that the first amplitude difference (k1) is greater than the second amplitude difference (k2).
- Method as claimed in claim 13 or 14, characterised in that the method or at least the change in the oscillation amplitude is performed in time ranges predetermined by a clock pulse.
- Method as claimed in any one of claims 11 to 15, characterised in that the predetermined value for the drive output corresponds to an output which can be provided at a maximum for a long period by the drive (2).
- Method as claimed in any one of claims 11 to 16, characterised in that the drive (2) comprises a motor and that the drive output is determined by measuring the rotational speed of the motor.
- Method as claimed in any one of claims 11 to 16, characterised in that the drive (2) comprises a hydraulic pump and that the drive output is determined by measuring the hydraulic pressure generated by the hydraulic pump.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10046336A DE10046336B4 (en) | 2000-09-19 | 2000-09-19 | Soil compacting device with vibration exciter and method for controlling the vibration exciter |
| DE10046336 | 2000-09-19 | ||
| PCT/EP2001/010818 WO2002025015A1 (en) | 2000-09-19 | 2001-09-19 | Soil compacting device comprising a vibration generator, and method for controlling the vibration generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1334234A1 EP1334234A1 (en) | 2003-08-13 |
| EP1334234B1 true EP1334234B1 (en) | 2005-11-23 |
Family
ID=7656785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01985279A Expired - Lifetime EP1334234B1 (en) | 2000-09-19 | 2001-09-19 | Soil compacting device comprising a vibration generator, and method for controlling the vibration generator |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6722815B2 (en) |
| EP (1) | EP1334234B1 (en) |
| JP (1) | JP2004510074A (en) |
| DE (2) | DE10046336B4 (en) |
| WO (1) | WO2002025015A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10317160A1 (en) | 2003-04-14 | 2004-11-18 | Wacker Construction Equipment Ag | System and method for automated soil compaction |
| US20050100417A1 (en) * | 2003-11-07 | 2005-05-12 | Geopartner Sp. Z O.O | Method of deep soil compacting from a surface |
| DE102005029432A1 (en) * | 2005-06-24 | 2006-12-28 | Wacker Construction Equipment Ag | Soil compacting device with automatic or operator-intuitive adjustment of advance vector comprises vibrating plate controlled so that the direction of action of force can be set in more than two locations or changed as wished |
| DE102006041784A1 (en) * | 2006-09-06 | 2008-03-27 | Wacker Construction Equipment Ag | vibration exciter |
| DE102007018743A1 (en) | 2007-04-22 | 2008-10-23 | Bomag Gmbh | Method and system for controlling compaction machines |
| DE102007048980A1 (en) * | 2007-10-12 | 2009-04-23 | Wacker Construction Equipment Ag | Ground ramming device with adaptive drive control |
| DE102008011408B4 (en) * | 2008-02-27 | 2018-06-21 | manroland sheetfed GmbH | Sheet-fed printing machine and method for putting a sheet-fed printing machine into operation |
| US8142103B2 (en) * | 2009-02-20 | 2012-03-27 | Caterpillar Trimble Control Technologies Llc | Wireless sensor with kinetic energy power arrangement |
| CN101649596B (en) * | 2009-09-17 | 2011-06-01 | 长安大学 | Paver screed satisfying transverse vibration uniformity |
| DE102010052243A1 (en) * | 2010-11-23 | 2012-05-24 | Wacker Neuson Produktion GmbH & Co. KG | Tamping device with synchronization device and method therefor |
| US8965638B2 (en) | 2011-06-30 | 2015-02-24 | Caterpillar Paving Products, Inc. | Vibratory frequency selection system |
| SE543161C2 (en) * | 2018-09-28 | 2020-10-13 | Dynapac Compaction Equipment Ab | Method of controlling operation of a vibratory roller |
| CN114924012A (en) * | 2022-03-07 | 2022-08-19 | 徐州市九州生态园林股份有限公司 | Soil detection device for mountain ecological restoration and use method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE443591B (en) * | 1981-10-28 | 1986-03-03 | Dynapac Ab | DEVICE FOR CONTINUOUS REVOLUTION OF THE VIBRATION AMPLIANCE WITH A ROTABLE EXCENTER ELEMENT |
| SE432792B (en) * | 1982-04-01 | 1984-04-16 | Dynapac Maskin Ab | PROCEDURE AND DEVICE FOR ACHIEVING OPTIMAL PACKAGING DEVICE WHEN PACKING DIFFERENT MATERIALS LIKE ASPHALT, EARTH ETC Means a vibrating roller |
| DE3421824C2 (en) * | 1984-06-13 | 1986-07-17 | CASE VIBROMAX GmbH & Co KG, 4000 Düsseldorf | Device for checking the compaction in vibration compaction equipment |
| EP0459063B1 (en) * | 1990-05-28 | 1993-09-22 | Caterpillar Paving Products Inc. | Apparatus and method for controlling the frequency of vibration of a compacting machine |
| ES2045843T3 (en) * | 1990-05-28 | 1994-01-16 | Caterpillar Paving Prod | APPARATUS AND METHOD FOR CONTROLLING A VIBRATORY TOOL. |
| SE502079C2 (en) * | 1993-10-14 | 1995-08-07 | Thurner Geodynamik Ab | Control of a packing machine measuring the properties of the substrate |
| US6431790B1 (en) * | 1996-10-21 | 2002-08-13 | Ammann Verdichtung Ag | Method of measuring mechanical data of a soil, and of compacting the soil, and measuring or soil-compaction device |
| DE19731731A1 (en) * | 1997-07-23 | 1999-02-25 | Wacker Werke Kg | Soil compaction device with variable vibration properties |
| DE10019806B4 (en) * | 2000-04-20 | 2005-10-20 | Wacker Construction Equipment | Soil compacting device with vibration detection |
| DE10028949A1 (en) * | 2000-06-16 | 2002-03-07 | Bomag Gmbh | Method and device for determining the degree of compaction in soil compaction |
-
2000
- 2000-09-19 DE DE10046336A patent/DE10046336B4/en not_active Expired - Fee Related
-
2001
- 2001-09-19 DE DE50108203T patent/DE50108203D1/en not_active Expired - Lifetime
- 2001-09-19 JP JP2002529598A patent/JP2004510074A/en active Pending
- 2001-09-19 US US10/381,079 patent/US6722815B2/en not_active Expired - Fee Related
- 2001-09-19 EP EP01985279A patent/EP1334234B1/en not_active Expired - Lifetime
- 2001-09-19 WO PCT/EP2001/010818 patent/WO2002025015A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| DE10046336A1 (en) | 2002-05-02 |
| US20030180093A1 (en) | 2003-09-25 |
| JP2004510074A (en) | 2004-04-02 |
| US6722815B2 (en) | 2004-04-20 |
| DE50108203D1 (en) | 2005-12-29 |
| WO2002025015A1 (en) | 2002-03-28 |
| EP1334234A1 (en) | 2003-08-13 |
| DE10046336B4 (en) | 2005-03-31 |
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