EP3181753B1 - Soil compactor and method for compacting a soil - Google Patents

Description

The present invention relates to a soil compactor which can be used, for example, for compacting asphalt laid in a flowable state in road construction. Furthermore, the invention relates to a method for compacting underground, for example, with asphalt material built underground.

When compacting strongly adherent material, such as e.g. Asphalt, built-up surface is to prevent adhesion of the material of the substrate to the outer peripheral surface of a compressor roller of the soil compactor liquid, such as water, applied to the outer peripheral surface, the compressor roller so sprinkles. In order to evenly distribute this liquid on the outer peripheral surface of a compacting roll over the entire length of the compacting roll, it is also possible, for example, to use scraper / distributor arrangements which comprise one or more blade-type scraper / distributor members. These abut against the outer peripheral surface of a respective compressor roller and, on the one hand, cause the adhering material to be scraped off, on the other hand, they contribute to a distribution of the liquid applied to the outer circumferential surface of a compressor roller.

The US 2008/0260462 A1 discloses a soil compactor according to the preamble of claim 1. In this soil compactor, a temperature sensing arrangement is provided adjacent each of two compressor rolls provided thereon for providing information about the temperature of a substrate to be compacted in the area of the soil compactor. Furthermore, the soil compactor in association with the compressor rollers sprinkler arrangements, with which water can be applied to the compressor rollers.

From the JP 2007132080 A is a soil compactor according to the preamble of claim 1 and a method for soil compaction according to the preamble of claim 11 known.

It is the object of the present invention to provide a soil compactor and a method for compacting substrate, in which the adhesion of material to be compacted substrate on the outer peripheral surface of one or more compressor rollers of a soil compactor can be reliably prevented.

• wenigstens eine um eine Drehachse drehbare Verdichterwalze,
• eine Temperaturerfassungsanordnung zur Bereitstellung von eine Temperatur eines Untergrunds im Bereich des Bodenverdichters repräsentierender Temperaturinformation,
• in Zuordnung zu wenigstens einer Verdichterwalze eine Berieselungsanordnung zur Berieselung dieser Verdichterwalze mit Flüssigkeit,
• eine Ansteueranordnung zur Ansteuerung der wenigstens einen Berieselungsanordnung auf Grundlage der Temperaturinformation oder/und zur Erzeugung eines Berieseln-Hinweises auf Grundlage der Temperaturinformation.

According to the invention, this object is achieved by a soil compactor, comprising:

• at least one compacting roller rotatable about an axis of rotation,
• a temperature sensing arrangement for providing temperature information representing a temperature of a subsoil in the area of the soil compactor,
• in association with at least one compressor roller, a sprinkling arrangement for sprinkling this compressor roller with liquid,
• a drive arrangement for controlling the at least one shower arrangement on the basis of the temperature information and / or for generating a showering indication based on the temperature information.

Since such soil compactors in general for performing a compression process in two directions of movement, so for example forward and backward, driven, is further provided according to the invention that the temperature detection arrangement at least one temperature sensor for detecting the temperature of the ground before the soil compactor during movement of the soil compactor in a first Movement direction and at least one temperature sensor for detecting the temperature of the ground in front of the soil compactor upon movement of the soil compactor in a direction of movement opposite to the second direction of movement comprises. Thus regardless of the direction in which a soil compactor is moved, it can be ensured that information about the temperature of the ground to which the soil compactor is moving can be provided and accordingly the driving arrangement is enabled, if necessary, the sprinkling arrangement of at least one compacting roller put into operation.

In the soil compactor constructed in accordance with the present invention, the temperature detecting device provides information for judging whether sprinkling of a compacting roller is required or not. In particular, when compacting asphalt, the risk of adhesion of building material of a paved surface is highly dependent on the asphalt temperature. In the case of the transition from a terrain positioned laterally next to the substrate to be compacted to the terrain built up with the subsoil to be compacted, it is possible, in particular according to the invention, to ascertain a distinct increase in temperature, if this subsoil to be compacted is constructed with asphalt material, in that a soil compactor moves into an area with a substrate to be compacted, in which there is basically the risk of adhesion of building material of the substrate to the outer peripheral surface of one or more compressor rollers, so that then the sprinkler arrangement can be put into operation and liquid on the outer circumferential surface of the compactor roller can be applied. In such an automated system, in addition to activating one or more shower arrangements, a showering indication, such as an optical, audible, or haptic indication, may be generated to an operator to indicate that one or more shower arrangements are being put into operation have been. In a non-fully automated system, if the temperature information indicates a temperature that requires sprinkling or where sprinkling is beneficial, such a sprinkling alert may be generated to signal an operator that the sprinkling is in the area in which a soil compactor is currently moving, is required or advantageous and the operator one or more Spritzer arrangements, for example, by corresponding operation of one or more switches on the drive arrangement can put into operation. Accordingly, when a soil compactor moves to an area where irrigation is no longer required or no longer advantageous, which can also be detected based on the temperature information, a previously operated irrigation arrangement can be deactivated, possibly accompanied by the termination of the production of the showering indication, or the generation of the showering indication may be terminated or a deactivation notice may be generated, thereby signaling an operator that they may previously disable active showering arrangements.

Since the risk of adhesion of building material of a substrate, in particular of asphalt material increases with increasing temperature, it is further proposed according to the invention that the drive arrangement is designed to control at least one sprinkler arrangement for sprinkling the associated compressor roller and / or the Sprinkler hint then generate when the temperature information indicates a temperature of the subsurface above a threshold temperature. Here, for example, be provided that the threshold temperature in the range of 70 ° C to 100 ° C, preferably at about 80 ° C, is located.

In order to detect changes in the terrain run over by a soil compactor, ie in particular a transition between a floor area in which the danger of sticking does not exist, to a floor area in which the risk of sticking due to a significantly higher temperature of the building material, the substrate, can be provided according to an advantageous aspect of the present invention further, that the drive arrangement is adapted to then control at least one sprinkler arrangement for sprinkling the associated compressor roller and / or to produce the Sprinkling hint, when the movement of the soil compactor in a direction of movement, the temperature information indicative of a temperature gradient of the temperature of the substrate substantially above the threshold temperature gradient in the direction of movement.

A temperature detection that can be continuously performed without contact during the compression operation can be achieved in that the temperature detection arrangement comprises at least one, preferably a plurality of optical temperature sensors.

According to a further advantageous aspect, a wiper / distributor arrangement with at least one wiper / distributor element which can be brought into abutment against an outer peripheral surface of the compressor roller may be provided in the ground compactor according to the invention in association with at least one compressor roller. The drive assembly may be configured to drive an actuator of at least one wiper / manifold assembly to place at least one wiper / spreader member in a wiping / dispensing mode with wiper / spreader member abutting the outer peripheral surface of the associated compressor roller when the wiper / spreader assembly This compressor roller associated sprinkler arrangement for sprinkling this compressor roller is driven. Alternatively or additionally, the drive arrangement may be configured to generate an out-of-operation indication when at least one showering arrangement is actuated to irrigate a compressor roller, and preferably when an operating condition detection arrangement of the stripper / distributor arrangement associated with said compressor roller indicates that a wiper / distributor organ This wiper / distributor arrangement is not in a stripping / distribution operating state. In this way, it can be ensured that the activation of a wiper / distributor arrangement distributes the liquid applied to a compacting roller over the entire outer peripheral surface and leaves substantially no areas not wetted with liquid. In the case of a wiper / distributor arrangement to be adjusted by an actuator, adjustment to the wiping / distributing operating state can take place under the control of the drive arrangement. In a manually operated scraper / manifold arrangement, an indication may be generated to signal an operator that the scraper / manifold assembly is not in its stripping / dispensing mode. The risk of forgetting to bring the wiper / distributor assembly into its stripping / dispensing mode of operation can thus be reduced. Accordingly, if a soil compactor moves or moves into an area where irrigation is no longer required or no longer advantageous, which may also be detected based on the temperature information, deactivating a scraper / manifold assembly previously placed in the stripping / dispensing mode a deactivating hint is generated indicating to an operator that one or more previously activated striker / distributor assemblies may be deactivated.

In order to be able to avoid the sprinkling of one or more compressor rolls, if this is not necessary, and to reduce in this way the consumption of liquid used for sprinkling, according to a particularly advantageous in connection with the preceding aspects of the invention, but in principle also independently feasible aspect of the present invention proposes that, in association with at least one compressor roller, a roller temperature detection arrangement is provided for providing a temperature of at least one compressor roller indicative roller temperature information, and that a drive arrangement for controlling at least one sprinkler arrangement based on the roller temperature information and / or for generating a sprinkling Note or a sprinkle-end indication is formed based on the roller temperature information.

It has been recognized that, in particular for compressor rolls which are constructed with rubber material on their outer circumference passing in contact with the substrate to be compacted, e.g. in the case of compressor rolls which comprise wheels constructed with rubber tires, there is substantially no risk of adhesion of building material of the substrate, for example asphalt, if they have a sufficiently high temperature in the region in which they come into contact with the substrate , If this rolling temperature is taken into account, sprinkling can thus be dispensed with in phases in which the risk of adhesion of material does not actually exist due to sufficient temperature, and thus liquid can be saved.

In order to realize this, the drive arrangement may be designed to then not trigger at least one shower arrangement for showering and / or then not generate the sprinkling indication, and / or be configured to actuate at least one sprinkler arrangement to terminate sprinkling and / or to produce a sprinkle finish indication when the roller temperature information indicates a roller temperature above a roller threshold temperature.

In particular, when the contact surface to be compacted with the compacting area of a compacting roller with rubber material, the roller threshold temperature may be in the range of 70 ° C to 90 ° C, preferably about 80 ° C.

The soil compacter constructed according to the invention may comprise at least one compacting roller with a roller casing constructed of metal material. Alternatively or additionally, at least one compressor roller may comprise a wheel with a tire constructed with rubber material.

1. a) Bereitstellen einer eine Temperatur des Untergrunds im Bereich eines zum Verdichten eingesetzten Bodenverdichters indizierenden Temperaturinformation,
2. b) Berieseln wenigstens einer Verdichterwalze des Bodenverdichters mit Flüssigkeit in Abhängigkeit von der Temperaturinformation oder/und Erzeugen eines Berieseln-Hinweises in Abhängigkeit von der Temperaturinformation.

Dabei ist weiterhin vorgesehen, dass die Temperatur des Untergrunds (U₁, U₂, U₃) vor dem Bodenverdichter (10) bei Bewegung des Bodenverdichters (10) in einer ersten Bewegungsrichtung (R₁) mittels einer Temperaturerfassungsanordnung (42) mit wenigstens einem Temperatursensor (44) und die Temperatur des Untergrunds (U₁, U₂, U₃) vor dem Bodenverdichter (10) bei Bewegung des Bodenverdichters (10) in einer der ersten Bewegungsrichtung (R₁) entgegengesetzten zweiten Bewegungsrichtung (R₂) mittels der Temperaturerfassungsanordnung (42) mit wenigstens einem Temperatursensor (46) erfasst wird.According to another aspect, the object mentioned at the outset is achieved by a method for compacting the substrate, preferably by means of a ground compactor according to the invention, comprising the measures:

1. a) providing a temperature information indicative of a temperature of the substrate in the region of a soil compactor used for compacting,
2. b) Sprinkling at least one compressor roller of the soil compactor with liquid in dependence on the temperature information and / or generating a Sprinkler hint depending on the temperature information.

It is further provided that the temperature of the substrate (U ₁ , U ₂ , U ₃ ) in front of the soil compactor (10) during movement of the soil compactor (10) in a first direction of movement (R ₁ ) by means of a temperature sensing arrangement (42) with at least one Temperature sensor (44) and the temperature of the substrate (U ₁ , U ₂ , U ₃ ) in front of the soil compactor (10) during movement of the soil compactor (10) in one of the first direction of movement (R ₁ ) opposite second direction of movement (R ₂ ) by means of Temperature detection arrangement (42) with at least one temperature sensor (46) is detected.

Since the risk of adhesion of building material of a substrate is highly dependent on the temperature of the building material of the substrate or a significant increase in temperature signals moving in a terrain with such a surface, it is further proposed that at least one compressor roller is then sprinkled or / and If the temperature information indicates a temperature of the subsurface above a threshold temperature and / or if, during movement of the soil compactor in a direction of movement, the temperature information is a temperature gradient of the temperature of the subsurface substantially above the threshold temperature gradient, substantially in the direction of movement indexed.

In order to avoid unnecessary leakage of liquid due to sufficiently high roll temperature, there is proposed a method with a measure c) of providing roll temperature indicative of a roll temperature of at least one compacting roll, wherein at least one Compressor roller is not sprinkled when the roller temperature information indicates a roll temperature lying above a roll threshold temperature, and / or a Sprinkles hint is not generated when the roller temperature information indicates a roll temperature above a roll threshold temperature, and / or the sprinkling of at least one compressor roller then stops when the roller temperature information indicates a roller temperature lying above a roller threshold temperature, and / or a showering end instruction is generated when the roller temperature ur information indicates a lying above a roll threshold temperature roller temperature.

In order to be able to ensure that the liquid applied to a compacting roll is evenly distributed on the outer peripheral surface of the compacting roll, it is further proposed that at least one stripper / distributor arrangement associated with a compacting roll be brought into a stripping / distribution operating state when this compacting mill is sprinkled and / or that an out-of-service alert is generated when at least one compressor roller is sprayed, preferably when a stripper / distributor assembly associated with that compressor roller is not in a stripping / dispensing mode.

Fig. 1

in prinzipartiger Darstellung einen auf einen zu verdichtenden Untergrund sich zu bewegenden Bodenverdichter;

Fig. 2

den Bodenverdichter der Fig. 1 näher an dem zu verdichtenden Untergrund;

Fig. 3

eine Draufsicht auf den Bodenverdichter der Fig. 1 bzw. 2 zum Veranschaulichen verschiedener Temperatursensoranordnungen;

Fig.4

in prinzipartiger Darstellung einen Teil eines Bodenverdichters mit einer Mehrzahl von als Räder mit Gummireifen aufgebauten Verdichterwalzen.

The present invention will be described below in detail with reference to the accompanying drawings. It shows:

Fig. 1

in principle a representation to be moved to a compacting ground compactor;

Fig. 2

the soil compactor of the Fig. 1 closer to the underground to be compacted;

Fig. 3

a plan view of the soil compactor of Fig. 1 and Fig. 2 for illustrating various temperature sensor arrangements;

Figure 4

in principle a representation of a part of a soil compactor with a plurality of constructed as wheels with rubber compactor rollers.

The Fig. 1 shows a generally designated 10 soil compactor. The soil compactor 10 comprises a compressor frame 12 on which, for example, a driver's cab 14 is arranged. At a front end 16 of the soil compactor 10 is a compressor roller 18 to a plane to the Fig. 1 rotatably disposed orthogonal compressor roll rotation axis. The compressor roller 18 may be constructed, for example, with a metal material Roll shell may be formed extending in the direction of the compressor roller axis of rotation over substantially the entire width of the front carriage 16 across. At a rear carriage 20 of the soil compactor 10, a further compressor roller 22 is provided, which, as well as the compacting roller 18, in the direction of the plane of the Fig. 1 orthogonal compressor roll axis of rotation substantially over the entire width of the rear carriage 20 extending and may be formed with a built up with metal material roll shell.

It should be pointed out here that one or both of the compressor rollers can also be provided by one or more wheels arranged next to one another in the direction of a respective roller rotational axis and with their outer peripheral surfaces passing over the ground to be compacted, each with a tire constructed with rubber material. Such wheels or tires are to be understood as rollers in the context of the present invention.

The front drum 16 provided on the compressor roller 18 is associated with a sprinkler 24. This may comprise a preferably extending along the compressor roller 18 in the direction of the compressor roller axis of rotation spray, by means of which from a liquid reservoir 25 supplied liquid can be applied to the outer peripheral surface 26 of the compressor roller 18, the compressor roller 18 can thus be sprinkled with the liquid.

The compressor roller 22 provided on the rear carriage 20 is assigned a shower arrangement 28. This can apply, for example, by means of a spraying bar extending in the direction of the roller rotation axis of this compressor roller 22 from a reservoir 29 liquid supplied to an outer peripheral surface 30 of the compressor roller 22.

The provided on the front of the car 16 compressor roller 18 is associated with a stripper / manifold assembly 32. This may, for example, have a blade-like scraper / distributor organ 34, which, either moved by an actuator or by manual operation, can be brought into abutting on the outer peripheral surface 26 of the compacting roller 18 stripping / distribution operating state or can be brought into an inactive state in which the wiper / distributor member 34 does not interact with the Outer peripheral surface 26 is.

Correspondingly, the compressor roller 30 at the rear carriage 20 is associated with a wiper / distributor assembly 36 having a wiper / dispenser member 38 which may also be brought into or out of engagement with the outer peripheral surface 30 of the compressor roller 22.

The two sprinkler arrangements 24, 28 are under the control of a drive arrangement generally designated 40. For example, this drive arrangement 40 may be configured to, when a respective compressor roller 18 or 22 is to be sprinkled with liquid, to set a fluid from the respective reservoir 25 or 29 pump in operation or to control valves to the flow path for to release the applied to a respective compressor roller 18 and 20 liquid.

The soil compactor 10 further includes a temperature sensing assembly, generally designated 42. The temperature sensing assembly 42 includes, for example, one or more temperature sensors 44 at the front end 16 and may advantageously further include one or more temperature sensors 46 at the rear end 20. The temperature sensors 44, 46 are preferably designed for non-contact detection of the temperature of the surface run over by the soil compactor 10. For example, the temperature sensors 44, 46 may be designed as optically operating temperature sensors or as thermal imaging cameras.

The temperature sensor or sensors 44 provided on the front carriage 16 scan the ground traveled by the soil compactor 10 in an area in front of the soil compactor 10 when the soil compactor 10 moves in a direction of movement R ₁ , for example a forward direction of travel can correspond. The temperature sensors 46 provided on the rear carriage 20 scan the ground traveled by the soil compactor 10 in the direction of travel in front of the soil compactor 10 when it moves in a direction of movement R ₂ opposite to the direction of movement R ₁ , for example a reverse direction.

The signals provided by the temperature sensors 44, 46 provide temperature information representative of the temperature of the subsurface in the area detected by this area. These sensor signals or temperature information are input to and used by the drive assembly 40 to operate the irrigation assemblies 24 and 28, respectively, and to apply liquid to the compressor rollers 18 and 22, respectively, as required.

In Fig. 1 For example, the soil compactor 10 is positioned in the region of a substrate U ₁ , which is already compacted, for example, or provides an access path to the substrate U ₃ to be compacted. The subsurface U ₁ is such that there is no danger that the building material thereof will adhere to the outer circumferential surfaces 26 or 30 of the compressor rollers 18, 22. If the soil compactor 10 moves on this substrate U ₁ in the direction of movement R ₁ toward the substrate U ₃ to be compacted, then the control arrangement 40 can use the temperature information provided by the temperature sensor or sensors provided on the front vehicle 16 as a decision criterion for the decision the two compressor rollers 18, 22 associated Sprieselungsanordnungen 24, 28 not to put into operation, since the temperature of this substrate U _{1 is} sufficiently low. Advantageously, the temperature information of those temperature sensors 44 and 46 is used for this decision, which scan the ground in the respective present direction of movement R ₁ and R ₂ before the soil compactor 10.

If the soil compactor 10 approaches the substrate U ₃ to be compacted, then, for example, when freshly applied asphalt material, which is still very hot, is provided in the region of the substrate U ₃ , the substrate U _{1 is provided} has already been compressed earlier or forms only a Zufahrtweg, occur in a transition region U _2, a significant increase in temperature, in particular on the surface of the substrate. In the in Fig. 1 represented graph, for example, the curve K _{1 represents} the temperature of the substrate on its surface, that is, substantially that temperature which is represented by a respective detection signal of the temperature sensors 44 and 46, respectively. This increase in the temperature in the transition from the substrate U ₁ to the substrate U ₃ is also reflected in one in the diagram of Fig. 1 noticeable with the curve K ₂ gradient of temperature noticeable. Here, the gradient represents the change in the temperature over the travel path or the distance between the substrate U ₁ and the substrate U ₃ .

The Fig. 2 shows the soil compactor 10 in a state in which this has approached the transition region U ₂ when moving in the direction of movement R ₁ . The temperature sensors 44 provided on the front carriage 16 now detect the transition region U ₂ lying in the direction of movement R _{1 in} front of the soil compactor 10 and thus provide information about the temperature of the substrate in the transitional region U ₂ . As in the in the Fig. 1 and 2 can be seen, the temperature increases significantly in this transition region U ₂ . Here, for example, a threshold temperature S _{1 can be} predetermined, the exceeding of which is detected in the drive arrangement 40 and then triggers the activation of the shower arrangements 24, 28. Alternatively or additionally, the exceeding of a threshold gradient S _{2 associated with} the curve K ₂ can also be used as trigger for the activation of the irrigation arrangements 24, 28.

Thus, it is ensured that when the temperature of the substrate is comparatively high or the compressor 10 moves into a region in which the substrate has a comparatively high temperature and thus the risk of adherence of building material of the substrate to the compressor rollers 18 and 22 exists, these compressor rollers are sprinkled and be wetted with a liquid film, which prevents the adhesion of material.

If it is recognized in the manner described above that the soil compactor 10 has moved to an area where the showering of one or more compressor rolls 18, 22 is required or advantageous, activation of one or more of the shower assemblies 24, 28 may occur be generated for an operator visually, acoustically or haptically perceptible irrigation hint. This signals, for example, during the entire operating period of the sprinkler arrangements 24, 28 that the sprinkling is active. Alternatively, such an indication could also be generated only at the beginning, that is to say when activating one or more of the sprinkler arrangements 24, 28. In a non-fully automated system, if it is recognized in the manner described above that the showering of one or more compressor rolls 18, 22 is required or advantageous, such a showering indication can be generated by the drive arrangement 40. An operator is thus signaled that irrigation is now required or advantageous so that, for example, by actuating one or more corresponding switches on the drive arrangement, one or more of the irrigation arrangements 24, 28 can be put into operation. The generation of this sprinkling hint may be terminated when the sprinkler arrangement (s) have been activated by an operator. For example, an active indication can then be generated which signals to the operator that one or more of the shower arrangements 24, 28 is or are in operation.

If the soil compactor 10 moves from a region in which the showering was required or advantageous into a region in which this is not necessary or advantageous, this can also be detected by evaluating the temperature information, for example by falling below corresponding threshold values. It can then be set the sprinkling, so the previously put into operation sprinkler arrangements 18, 24 are disabled. This may be accompanied by stopping the generation of the sprinkling hint. at In a system that does not operate fully automatically, a deactivation message can be generated in this state which signals to an operator that the previously active spray arrangements can be deactivated. This indication can be generated, for example, until the sprinkler arrangements are actually no longer in operation.

In order to evenly distribute the liquid applied to the compressor rolls 18, 22 by means of the sprinkler arrangements 24, 28, the wiper / distributed members 34, 38, which abut the outer peripheral surfaces 26, 30 in a blade-like manner, can be used to distribute the applied liquid. For this purpose, it can be provided, for example, that whenever the sprinkler arrangements 24, 28 are activated, the wiper / distributor arrangements 32, 36 are brought into their stripping / distribution operating state, if this is not already the case. This can be done with automatically operable scraper / manifold assemblies 32, 36 under control of the drive assembly 40, so that when the sprinkler assemblies 24, 28 are activated, these also the scraper / distributor assemblies 32 associated with the compressor rollers 18, 22, respectively, 36 activated. In non-automated scraper / manifold arrangements, as the drive assembly 40 operates the irrigation assemblies 24-28 and is indexed by corresponding sensors, the driver assembly 40 may not yet be in stripping / s with one or both of the scraper / manifold assemblies 32, 36. Distribution operating state is / are, produce a visually and / or acoustically and / or haptic perceptible hint. In principle, such an indication could always be generated, regardless of the state of a respective wiper / distributor arrangement, when a sprinkler arrangement is put into operation. The generation of this indication may be terminated, for example, when one or more of the wiper / distributor assemblies has been placed in the wiper / distributor operating condition by an operator. In this state, an active indication can then be generated, for example, which signals that one or more of the wiper / distributor arrangements are in operation.

If the soil compactor 10 moves to an area where irrigation is no longer required and is therefore to be adjusted or adjusted, the previously active scraper / manifold arrangements can be deactivated or not fully populated with the completion of irrigation a deactivating hint is generated, which indicates to an operator that the previously active wiper / distributor arrangements can be deactivated. This indication can be generated, for example, until the wiper / distributor arrangements are deactivated.

The Fig. 3 In the area of the front carriage 16, two temperature sensors 44 positioned at a lateral distance, ie in transverse compactor in transverse direction, are shown, which respectively determine the temperature in the region in front of the front carriage 16 near a corner region of the soil compactor 10 or 16 of the front end. This positioning ensures that even if the soil compactor 10, as in Fig. 3 shown, transversely moved in a region in which there is a higher temperature of the substrate or the temperature of the substrate increases significantly, this is detected in good time and accordingly by means of the drive arrangement 40, the irrigation can be started. At the rear carriage 20, a temperature sensor 46 is provided, which is designed for line-like detection of the temperature of a surface area in the area in front of the rear carriage 20. For example, this temperature sensor 46 could be designed as a thermal imaging camera. It should be noted here that a wide variety of numbers and configurations of temperature sensors on the front of the vehicle 16 and the rear carriage 20 can be selected. In principle, other or more or fewer temperature sensors may be provided on the front carriage 16 than on the rear carriage 20.

In Fig. 4 is a previously mentioned embodiment of a soil compactor 10 shown in principle representation. This soil compactor 10 comprises, on at least one of its axes, a plurality of compressor rolls 46a, 46b, 46c, 46d, which are rotatable juxtaposed about a common axis of rotation are supported on a frame 54 of the soil compactor 10. For example, these compressor rolls 46a, 46b, 46c, 46d may each comprise a wheel with a tire 52 constructed of rubber material. Each of these wheels providing a compressor roller 46a, 46b, 46c, 46d comes into contact with the outer peripheral portion of its tire 52 in contact with the substrate to be compacted. In this case, for sprinkling of these compressor rollers 46a, 46b, 46c, 46d basically in the above with reference to the Fig. 1-4 be proceeded described manner. The interaction of these compressor rollers 46a, 46b, 46c, 46d with these individual or jointly associated wiper / distributor arrangements can also be carried out as described above.

When constructed on their outer circumference with rubber material compressor rollers, the risk of adherence of material of the substrate, especially asphalt, essentially only when such compressor rollers have in their passing with this material in contact area a comparatively low temperature. At higher roll temperature, there is substantially no danger of adhesion of such material.

According to another in FIG. 4 illustrated principle of the present invention may therefore be provided that the temperature of at least one compressor roller is detected, wherein preferably the temperature of the compressor roller in the outer peripheral region thereof, that is, the region which comes into contact with the material to be compacted and optionally adhering material, is detected. In the in Fig. 4 In the illustrated example, a roller temperature sensing arrangement 48a, 48b, 48c, 48d is provided in association with each compressor roller 46a, 46b, 46c, 46d. Each roller temperature sensing arrangement 48a, 48b, 48c, 48d may, for example, comprise a temperature sensor, preferably designed for optical temperature detection, which detects the temperature at the outer periphery of the associated compressor roller 46a, 46b, 46c, 46d. The output signals of the roller temperature sensing arrangements 48a, 48b, 48c, 48d representing a respective roller temperature can be converted into the, for example, in FIG Fig. 1 shown drive arrangement 40, which also based on these output signals then, for example can generate corresponding control commands for Sprizelungsanordnungen 50a, 50b, 50c. When the roll temperature of a respective compressor roll 46a, 46b, 46c, 46d is below a roll threshold temperature which may be in the range of 70-90 ° C, preferably about 80 ° C, the one associated with a respective compressor roll 46a, 46b, 46c, 46d Sprinkler arrangement 50a, 50b, 50c activated to sprinkle the surface of the roller with liquid, such as water. If the roll temperature exceeds this roll threshold temperature, which may be the case, for example, after prolonged contact with the building material of the substrate to be compacted, continuous sprinkling is no longer necessary. The irrigation arrangement 50a, 50b, 50c associated with a respective compressor roller 46a, 46b, 46c, 46d can therefore be deactivated by the drive arrangement 40, for example. Also, the wiper / distributor arrangement associated with a respective compressor roller 46a, 46b, 46c, 46d can be deactivated. Alternatively, it is possible for the drive assembly 40 to generate a showering end indication indicating to an operator that continued showering is no longer required. The latter can then deactivate the sprinkler arrangements 50a, 50b, 50c and, if appropriate, also put the scraper / distributor arrangement assigned to a respective compressor roller 46a, 46b, 46c, 46d out of operation. Such a sprinkling-end indication could, for example, also be provided by the fact that a previously generated sprinkling reference is no longer generated.

In Fig. 4 is exemplified in association with each compressor roller 46a, 46b, 46c, 46d a co-operating therewith roller temperature sensing arrangement 48a, 48b, 48c, 48d. Thus, the temperature of each compressor roller 46a, 46b, 46c, 46d can be detected and independently decided in connection with each compressor roller 46a, 46b, 46c, 46d whether or not it is to be sprinkled. For this purpose, in association with each compressor roller 46a, 46b, 46c, 46d, a shower arrangement cooperating only with this can be provided. In the in Fig. 4 As illustrated, each of the three sprinkler arrangements 50a, 50b, 50c shown cooperates with two directly adjacent compressor rollers, which contributes to a somewhat simplified construction. In a further alternative embodiment, for example, only in association with a a single roll of roller temperature sensing arrangement may be provided, as it can be assumed in principle that when one of the roll temperature lying above the roll threshold temperature, this also applies to the other compressor rolls.

In conclusion, it should be pointed out that in a soil compactor constructed according to the invention, the sprinkler arrangements can be designed in many different ways. You can, for example, deliver the pressure applied to a respective associated compressor roller substantially free of pressure, but may alternatively be formed for spraying the liquid. Furthermore, it can be provided, for example, that a sprinkling arrangement is provided only in association with one of a plurality of compressor rollers. The activation of a respective wiper / distributor arrangement, when a compressor roller is sprinkled with liquid, can for example be such that in the drive arrangement 40 for the sprinkler arrangement on the one hand and the wiper / distributor arrangement on the other hand are independent of each other based on the temperature information a corresponding drive signal is generated, for. For example, when a predetermined reference threshold is exceeded. Alternatively, for example, the generation of the drive signal for the shower arrangement can be used as a trigger for the generation of a drive signal for the wiper / distributor arrangement. Advantageously, therefore, these two arrangements are put into operation simultaneously. Alternatively, the two arrangements may also operate independently of one another or with a time offset, for example in the sense that the stripper / distributor arrangement is not brought into its stripping / distributor operating state until a certain amount of liquid has been applied to the outer circumferential surface of the associated compressor roller was applied, so for example, the sprinkler arrangement was already operated for a predetermined lead time, or that first the scraper / manifold arrangement is activated and only then the sprinkler arrangement is put into operation. For the purposes of the present invention, these procedures also mean that the wiper / distributor arrangement is put into operation when the shower arrangement is activated.

Claims (15)

1. A soil compactor, comprising:

   - at least one compacting roller (18, 22) rotatable about an axis of rotation,

   - a temperature detecting device (42) for providing temperature information representing a temperature of a substrate (U₁, U₂, U₃) in the area of the soil compactor (10),

   - a sprinkling device (24; 28; 50a, 50b, 50c) associated to at least one compacting roller (18, 22; 46a, 46b, 46c, 46d) for sprinkling this compacting roller (18, 22; 46a, 46b, 46c, 46d) with fluid,

   - a control device (40) for controlling the at least one sprinkling device (24, 28; 50a, 50b, 50c) on the basis of the temperature information or/and for generating a sprinkling indication on the basis of the temperature information,

   characterized in that
   the temperature detecting device (42) comprises at least one temperature sensor (44) for detecting the temperature of the substrate (U₁, U₂, U₃) in front of the soil compactor (10) during movement of the soil compactor (10) in a first movement direction (R₁) and at least one temperature sensor (46) for detecting the temperature of the substrate (U₁, U₂, U₃) in front of the soil compactor (10) during movement of the soil compactor (10) in a second movement direction (R₂) opposed to the first movement direction (R₁).
2. The soil compactor according to claim 1, characterized in that the control device (40) is designed to control the at least one sprinkling device (24, 28; 50a, 50b, 50c) for sprinkling the associated compacting roller (18, 22; 46a, 46b, 46c, 46d) or/and for generating the sprinkling indication when the temperature information indicates a temperature of the substrate (U₁, U₂, U₃) above a threshold temperature (S₁).
3. The soil compactor according to claim 2, characterized in that the threshold temperature (S₁) lies in the range from 70°C to 100°C, preferably at approximately 80°C.
4. The soil compactor according to one of claims 1-3, characterized in that the control device (40) is designed to control the at least one sprinkling device (24, 28; 50a, 50b, 50c) for sprinkling the associated compacting roller (18, 22; 46a, 46b, 46c, 46d) or/and for generating the sprinkling indication when, during movement of the soil compactor in a movement direction (R₁), the temperature information indicates a temperature gradient of the temperature of the substrate above a threshold temperature gradient (S₂) essentially in the movement direction (R₁, R₂).
5. The soil compactor according to one of claims 1-4, characterized in that the temperature detecting device (42) comprises at least one, preferably a plurality, of optical temperature sensors (44, 46).
6. The soil compactor according to one of claims 1-5, characterized in that a scraper/distribution device (32, 36) is provided, associated to at least one compacting roller (10), comprising at least one scraper/distribution element (34, 38) which can be brought into contact with an outer circumferential surface (26, 30) of the compacting roller (18, 22), and in that the control device (40) is designed to control a positioning element of at least one scraper/distribution device (32, 36) for positioning at least one scraper/distribution element (34, 38) in a scraping/distributing operating state with the scraper/distribution element (24, 28) contacting the outer circumferential surface (26, 30) of the associated compacting roller (18, 22) when the sprinkling device (24, 28) associated to this compacting roller (18, 22) is controlled to sprinkle this compacting roller (18, 22), or/and the control device (40) is designed to generate an out of service indication when at least one sprinkling device (24, 28) is controlled for sprinkling a compacting roller (18, 22), preferably when an operating state detection device of the scraper/distribution device (32, 36) associated to this compacting roller (18, 22) indicates that a scraper/distribution element (34, 38) of this scraper/distribution device (32, 36) is not in a scraping/distributing operating state.
7. The soil compactor according to one of claims 1-6, characterized in that a roller temperature detecting device (48a, 48b, 48c, 48d) is provided, associated to at least one compacting roller (46a, 46b, 46c, 46d) to provide roller temperature information indicating a temperature of at least one compacting roller (46a, 46b, 46c, 46d), and that a control device (40) is designed for controlling at least one sprinkling device (50a, 50b, 50c) on the basis of the roller temperature information or/and for generating a sprinkling indication or a stop-sprinkling indication on the basis of the roller temperature information.
8. The soil compactor according to claim 7, characterized in that the control device (40) is designed to control at least one sprinkling device (50a, 50b, 50c) to not sprinkle, or/and to not generate the sprinkling indication, or/and is designed to control at least one sprinkling device (50a, 50b, 50c) to stop the sprinkling or/and to generate a stop-sprinkling indication when the roller temperature information indicates a roller temperature over a roller threshold temperature.
9. The soil compactor according to claim 8, characterized in that the roller threshold temperature lies in the range from 70°C to 90°C, preferably at approximately 80°C.
10. The soil compactor according to one of claims 1-9, characterized in that at least one compacting roller (18, 22) is designed with a roller jacket constructed from a metal material, or/and that at least one compacting roller (46a, 46b, 46c, 46d) comprises a wheel with a tire (52) constructed using rubber material.
11. A method for compacting a substrate, comprising the measures:

    a) providing temperature information indicating a temperature of the substrate (U₁, U₂, U₃) in the area of a soil compactor (10) used for compacting,

    b) sprinkling at least one compacting roller (18, 22; 46a, 46b, 46c, 46d) of the soil compactor (10) with fluid as a function of the temperature information provided in measure a) or/and generating a sprinkling indication as a function of the temperature information provided in measure a),

    characterized in that
    the temperature of the substrate (U₁, U₂, U₃) in front of the soil compactor (10) during movement of the soil compactor (10) in a first movement direction (R₁) is detected by a temperature detecting device (42) with at least one temperature sensor (44) and the temperature of the substrate (U₁, U₂, U₃) in front of the soil compactor (10) during movement of the soil compactor (10) in a second movement direction (R₂) opposed to the first movement direction (R₁) is detected by means of the temperature detecting device (42) with at least one temperature sensor (46).
12. The method according to claim 11, characterized in that at least one compacting roller (18, 22; 46a, 46b, 46c, 46d) is sprinkled or/and the sprinkling indication is generated when the temperature information indicates a temperature of the substrate (U₁, U₂, U₃) above a threshold temperature (S₁) or/and when, during movement of the soil compactor (10) in a movement direction (R₁), the temperature information (S₂) indicates a temperature gradient of the temperature of the substrate (U₁, U₂, U₃) above a threshold temperature gradient essentially in the movement direction (R₁).
13. The method according to claim 11 or 12, characterized in that the method comprises a measure c) for providing roller temperature information indicating a roller temperature of at least one compacting roller (46a, 46b, 46c, 46d), and that at least one compacting roller (46a, 46b, 46c, 46d) is not sprinkled with fluid or/and a sprinkling indication is not generated, or/and the sprinkling of at least one compacting roller (46a, 46b, 46c, 46d) is stopped or/and a stop-sprinkling indication is generated when the roller temperature information indicates a roller temperature above a roller threshold temperature.
14. The method according to one of claims 11-13, characterized in that at least one scraper/distribution device (32, 36) associated to a compacting roller (18, 22; 46a, 46b, 46c, 46d) is then brought into a scraping/distributing operating state when this compacting roller (18, 22) is sprinkled, or/and that an out of service indication is generated when at least one compacting roller (18, 22; 46a, 46b, 46c, 46d) is sprinkled, preferably when a scraper/distribution device (32, 36) associated to this compacting roller (18, 22; 46a, 46b, 46c, 46d) is not in a scraping/distributing operating state.
15. Method according to one of claims 11-14, characterized in that the method is carried out using a soil compactor (10) according to one of claims 1-10.

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