Ground compaction equipment and asphalt paver

Abstract

The utility model relates to a ground compaction equipment has: rotatablely supported on the bearing structure compaction roller, compaction roller includes the outer periphery of cylindrical and can roll on the ground, set up on the bearing structure coating edge processing apparatus, it includes edge processing roller, roller holding device to and including adjusting driver, roller holding device and edge processing roller together by adjusting driver drive can be supported on the bearing structure from end position adjustment to edge processing position, adjusting driver has hydraulic system, the ground compaction equipment has for coating edge processing apparatus state determination device, it includes: sensor device for detecting at least one operating parameter of hydraulic system, and identification device, the identification device is set up for, based on at least one operating parameter of hydraulic system, the state of edge processing roller is identified. The utility model is also related to a bituminous road roller with the ground compaction equipment.

Description

Technical Field

[0001] This utility model relates to a ground compaction device and an asphalt roller. Background Technology

[0002] Ground compaction equipment is commonly used in road construction or similar applications to compact ground overlays, such as asphalt layers or asphalt pavements. These ground compaction devices share a common feature: they include compaction rollers rotatably supported on a load-bearing structure about a horizontal axis of rotation extending transversely to the direction of operation. The compaction rollers have an outer circumferential surface that is at least substantially cylindrical and rolls on the ground during compaction. Such compaction rollers in rubber-tired rollers can be, for example, rubber tires, or so-called Walzbandage rollers, for example, made of steel or composite materials. Walzbandage rollers typically include a hollow cylindrical drum wall that rolls on the ground to be compacted with its outer circumferential surface. Particularly common in road construction, such ground compaction equipment follows pavers for recompacting and / or leveling asphalt pavements laid by the pavers. The ground compaction equipment typically refers to self-propelled ground compaction equipment, which usually has two or more such compaction rollers and is in the form of a road roller, especially a pivot-steering or articulated twin-drum road roller. Road rollers of this type are disclosed, for example, in documents DE 10 2018 007 825 A1 and DE 10 2017 011 146 A1.

[0003] In addition to the simple compaction process, other reprocessing processes can be supplemented or alternatively incorporated when using such ground compaction equipment, such as spreading gravel to improve the adhesion (Griffigkeit) of the road overlay, or defining the edge area of ​​the asphalt layer laid by the paving machine traveling ahead. This invention relates to the reprocessing of the edge area of ​​the laid asphalt surface layer by means of an overlay edge processing device mounted on a load-bearing structure. This overlay edge processing device is used to shape and / or cut the edges of the asphalt subbase as the ground compaction equipment travels over the asphalt surface layer. Specifically, this can be distinguished as an edge cutter and an edge extrusion device, but both have very similar basic structures. The main components of this overlay edge processing device are: a generally undriven edge processing roller, an adjustable roller holding device, especially an adjusting arm, and an adjusting drive. The edge processing roller can be configured to be significantly smaller in diameter than the compaction roller, for example, having a diameter less than half the diameter of the roller, especially less than one-third the diameter of the roller.

[0004] Edge cutting machines are specifically designed for cutting or separating a strip of asphalt surface layer, similar to a measuring tape, and for this purpose may include cutting rollers. For this purpose, the edge cutting rollers can descend into the thickness of the asphalt surface layer and be pushed through it in the working direction. In contrast, edge extrusion devices contain extrusion rollers that descend laterally beside the asphalt surface layer into the thickness of the asphalt subbase and thereby extrude and shape the side of the asphalt surface layer.

[0005] Furthermore, the edge processing roller, in at least one edge processing position, protrudes at least partially from the end side of the compaction roller (drum) along the direction of the travel rotation axis, so as to be able to cut and / or squeeze the ground adjacent to the compaction roller, especially directly adjacent to the compaction roller along the direction of the travel rotation axis, during operation. For this purpose, the edge processing roller on the adjustable roller holding device can be adjusted relative to the outer circumferential surface of the compaction roller between the end position, or the transport position where it is not in contact with the ground, and the edge processing position. Here, the end position refers to a position in which the edge processing roller does not protrude in the radial direction relative to the travel rotation axis of the compaction roller, relative to the lower vertical apex of the compaction roller's cross-section, and thus is generally not in contact with the ground cover. Conversely, the edge processing position refers to an adjustable position of the edge processing roller in which it is positioned at least flush with the lower vertical apex of the compaction roller, or preferably protrudes vertically downwards or even to a defined degree from the outer circumferential surface of the compaction roller, especially protruding relative to the lower apex of the outer circumferential surface of the compaction roller. Importantly, it is not typically a single edge-processing location, but rather that the edge-processing location is variable within a defined area to allow for adaptation, for example, to a specific thickness of the ground cover. Thus, in the edge-processing location, the edge-processing roller cuts into the ground cover and / or compresses the ground cover in the lateral region to obtain a uniformly shaped ground cover edge.

[0006] To prevent the operator of such ground compaction equipment from having to manually adjust the position of the coating edge processing roller each time they change the position between the end position and the edge processing position, the coating edge processing roller is preferably adjustablely supported on a roller holding device, particularly an adjusting arm, by means of an adjusting actuator. This adjusting actuator may, for example, include a hydraulic system with a hydraulically operated cylinder-piston unit having a hydraulic cylinder.

[0007] Examples of coating edge processing devices are described, for example, in DE 91 11 398 U1, DE 1 939 680 U1, DE 3020 796 A1, DE 29 27 883 A1 and DE 87 10 179 U1.

[0008] Users of such overlay edge finishing devices typically have to visually monitor their status, and in some cases, must continuously observe the device from the roller to check its position. This is neither ergonomically sound nor meets safety and accuracy requirements. Therefore, some rollers incorporate position sensors for the overlay edge finishing device, such as those described, for example, in U.S. Patent US 10,662,590 B1.

[0009] Here, the sensor measures the distance from the coating edge processing device to the ground. The sensor is externally mounted on the coating edge processing device. However, such a sensor, which only provides a distance value, may give incorrect data. In the case of optical sensors, obstacles, dirt, or adverse viewing conditions can distort the sensor data. Furthermore, the sensor only provides this single distance value; determining the edge processing roller position solely based on such a value may lead to problems in terms of reliability and safety. Additionally, the sensor requires adjustment and calibration. Sensor adjustment and calibration are time-consuming, and during this time, the ground compaction equipment is no longer performing the ground compaction process, resulting in downtime and waiting time.

[0010] That is to say, the known road rollers have the problem that the location of the overlay edge processing device is highly dependent on the experience and initiative of the road roller operator, and this is not in line with ergonomic principles; or the data used for distance measurement is based on a sensor whose function is affected by various factors. Utility Model Content

[0011] Therefore, based on the known prior art, the purpose of this utility model is to provide a ground compaction device of the aforementioned type and a method for operating the ground compaction device, which, compared with known solutions, achieves simplified operation, particularly in determining the location of the cladding edge processing device during operation.

[0012] The objective is achieved using the ground compaction equipment and asphalt roller according to this utility model.

[0013] According to this utility model, a ground compaction device is proposed, which is used to compact ground cover layers, and the ground compaction device...

[0014] - A compaction roller having at least one rotatable bearing structure supported on the ground compaction equipment about a horizontal axis of rotation extending transversely to the working direction, the compaction roller comprising a cylindrical outer circumferential surface that rolls on the ground during compaction operation.

[0015] - A coating edge processing device disposed on the supporting structure, the coating edge processing device including an edge processing roller, an adjustable roller holding device, and an adjusting driver, wherein the adjustable roller holding device, together with the edge processing roller, is supported on the supporting structure by the adjusting driver and can be adjusted from an end position to an edge processing position.

[0016] - Wherein, the adjusting actuator has a hydraulic system, and the hydraulic system has a hydraulic cylinder,

[0017] in,

[0018] The ground compaction equipment has a state determination device for the overlay edge processing device, the state determination device comprising the following components:

[0019] - A sensor device for detecting at least one operating parameter of the hydraulic system having hydraulic cylinders; and

[0020] - An identification device configured to identify the state of the edge processing roller based on at least one operating parameter of the hydraulic system having a hydraulic cylinder.

[0021] According to this utility model, an asphalt roller is also provided, which has a ground compaction device according to this utility model.

[0022] Current types of ground compaction equipment are used for compacting ground cover and include at least one compaction roller rotatably supported on a carrier structure of the ground compaction equipment about a horizontal axis of rotation extending transversely to the working direction. The compaction roller comprises a cylindrical outer circumferential surface that rolls on the ground during compaction. The compaction roller may, in particular, be a road roller drum. Through this rolling motion, the ground compaction equipment or the compaction roller comes into contact with the ground to be compacted. This can be done statically, but may also be done dynamically by means of a vibration exciter known per se.

[0023] Furthermore, the ground compaction equipment also includes a cladding edge processing device disposed on the supporting structure. The cladding edge processing device is used to process, for example, cut and / or compress the edges of the cladding as the ground compaction equipment passes over it. For this purpose, the cladding edge processing device includes, in a manner known per se, an edge processing roller; an adjustable roller holding device, particularly an adjusting arm; and an adjusting drive, wherein the edge processing roller is rotatably supported on the adjustable roller holding device about a roller rotation axis. The edge processing roller is typically undriven and rotatably disposed on the roller holding device. The edge processing roller may have a central support axis and a processing surface extending obliquely around the support axis, particularly in the radial direction. The adjustable roller holding device is configured such that, together with the edge processing roller, it is supported on the supporting structure via the adjusting drive, adjustable relative to the outer circumferential surface of the compaction roller from an end position to an edge processing position. For this purpose, the adjustable roller holding device, in particular, can be an adjusting arm and / or an adjusting lever, which is adjustablely supported on one side of the support structure relative to the support structure, and has a bearing for the edge processing roller spaced apart from this support position. In principle, the form of the adjusting movement between the endpoint position and the edge processing position can vary. However, it is preferred that the adjusting arm can swing relative to the support structure about a swing axis between the endpoint position and the edge processing position. In this case, the swing axis can extend, in particular, parallel to the travel rotation axis of the compaction roller. The endpoint position can be, in particular, a definite or unique raised position relative to the ground, unlike the endpoint position, the edge processing position can be one of several possible positions within the adjustment range. The adjustment range can, for example, extend vertically downwards from a region to a maximum adjustment position, from which the edge processing roller, with its vertically lower apex, is at the height of the lower apex of the roller drum when viewed vertically.

[0024] Another novel component of the ground compaction equipment according to this invention can be a hydraulic system with a hydraulic cylinder that enables stepless adjustment of an adjusting arm relative to a load-bearing structure or, in particular, a roller drum, on which the overlay edge processing device is mounted. The piston rod of the hydraulic cylinder can be fixed to the adjusting arm of the overlay edge processing device using a bearing. In one example, the bearing connects the hydraulic cylinder, and in particular the piston rod, to the adjusting arm. In another example, the bearing fixes the hydraulic cylinder, and in particular the piston rod, to the adjusting arm, that is, keeps the piston rod in a fixed position relative to the adjusting arm, particularly throughout the operation of the overlay edge processing device. The hydraulic cylinder can be, for example, a differential cylinder that allows controllable movement of the piston rod in two directions and includes corresponding supply and outlet lines. The hydraulic system including the hydraulic cylinder can include both the supply and outlet lines and other components necessary for the operation of the hydraulic cylinder, such as pumps, valves, fittings, and the like.

[0025] Importantly, according to the embodiment described herein, the ground compaction equipment has a state determination device for the coating edge processing apparatus. This state determination device can be configured to determine (e.g., by estimation) and, if necessary, monitor the current state of the coating edge processing apparatus. Specifically, the state determination device can be configured to detect the current state of the edge processing rollers. Multiple states of the coating edge processing apparatus can be determined using the state determination device according to this invention. This provides useful information about the current state of the coating edge processing apparatus, which can make operation safer and more reliable, and result in more uniform (processing) outcomes. Alternatively, the state determination device may also be referred to as a state measuring device or a state monitoring device.

[0026] In the ground compaction equipment according to this invention, the state determination device can detect, for example, at least one operating parameter and / or operating parameter change of a hydraulic cylinder or a hydraulic system including a hydraulic cylinder via a sensor device. Typically, the at least one operating parameter and / or the at least one operating parameter change is transmitted to an identification device. This can be done via wireless or wired communication. Based on the at least one operating parameter and / or operating parameter change detected by the sensor device and transmitted from the hydraulic system, the identification device can identify and / or determine the state of the edge processing rollers of the ground compaction equipment.

[0027] In one embodiment, the sensor device has at least one of the following features:

[0028] - Measuring orifice plate,

[0029] - Flow sensor,

[0030] -At least one pressure sensor,

[0031] - Ultrasonic flow sensor, and / or

[0032] - Timer.

[0033] In one embodiment, the at least one operating parameter of the hydraulic cylinder or the hydraulic system may relate to state quantities, state quantity changes, and / or time, particularly the activity time or activity period of the hydraulic cylinder, typically the activity time of the hydraulic cylinder from the moment the edge processing roller occupies its end position. The identification device can then identify or determine the current state of the edge processing roller. The current state of the edge processing roller may, in particular, include the position of the edge processing roller (e.g., relative to the ground), the contact of the edge processing roller with the ground, or a collision with an obstacle. The identification device may include suitable computer equipment.

[0034] Therefore, the state determination device of the ground compaction equipment according to the present invention can identify or detect determined events and / or positions of the edge processing rollers based on determined operating parameters in the hydraulic system, such as, for example, position adjustment events (and thus particularly determined adjustment strokes), degree of position adjustment, reaching the surface (such as, for example, the surface to be processed), or even undesirable events, such as collisions with obstacles.

[0035] In the overall system, in the ground compaction equipment according to this invention, data from the hydraulic system or data related to the hydraulic cylinder are used to determine the state of other components of the ground compaction equipment. Specifically, hydraulic parameters (referred to herein as operating parameters) occurring during the operation of the hydraulic cylinder are used in particular to identify the state of the edge processing rollers located away from the hydraulic cylinder. It may be advantageous to detect known operating parameters of the hydraulic cylinder or the hydraulic system containing the hydraulic cylinder. Additional sensors can be used, but this is not necessary. Here, additional installed sensors, such as sensors for distance measurement, may not be required. In one embodiment of the ground compaction equipment according to this invention, for example, only the operating parameters of the hydraulic cylinder or the hydraulic system containing the hydraulic cylinder are used to determine the state of the edge processing rollers. The hydraulic parameters may in particular be pressure and / or pressure change and / or volumetric flow and / or flow direction and / or flow rate and / or quantities and / or measurements associated with one or more of the said hydraulic parameters.

[0036] The result of determining the state of the edge processing roller by the at least one operating parameter of the hydraulic cylinder is the simplified determination of the adjustment stroke, reliable determination of the processing progress, and / or avoidance of conditions that could damage components of the ground compaction equipment. Which advantage prevails depends primarily on the type of operating parameter detected and the further use of the one or more detected operating parameters, as particularly shown in the specific embodiments below.

[0037] In one example, the sensor device of the state determination apparatus is specifically configured to detect at least the pressure in the hydraulic cylinder or at a defined or targeted location in the hydraulic system (e.g., the supply line to the hydraulic cylinder), the volumetric flow rate or volumetric flow in the hydraulic cylinder, and / or the operating time of the hydraulic cylinder's activity, which is typically the adjustment time of the activity since the last time it occupied the endpoint position. "Activity time" refers to the time period during which the hydraulic cylinder is hydraulically adjusted along its length, and therefore refers to a period that ultimately gives the duration of the adjustment movement of the hydraulic cylinder. In particular, detecting the activity time of the hydraulic cylinder as the sole operating parameter allows for the determination of the adjustment stroke completed so far as the state of the edge processing roller. The adjustment stroke determined based on the time value can be considered a somewhat coarse estimate, and can be regarded as a simple, effective, and objective determination of the state of the edge processing roller, albeit less precise. Thus, the sensor device, which in some cases only includes a timer, can be used particularly cost-effectively. Since the time is preferably measured from the last time the edge processing roller occupied the endpoint position, the endpoint position of the ground compaction equipment can be designed accordingly. For example, the endpoint position can be defined by a stop for the edge processing roller itself, an adjusting arm for the edge processing roller, or other elements of the coating edge processing device. In this case, the time since the edge processing roller began moving from the initial or endpoint position defined by the stop can be appropriately detected. Combined with a known distance to the ground or the relationship between the edge processing roller and a compaction roller rolling on the ground, the position of the edge processing roller relative to the ground can be determined simply, effectively, and with low cost.

[0038] In one embodiment of the ground compaction equipment according to this utility model, the pressure at two locations of the hydraulic cylinder or the hydraulic system including the hydraulic cylinder is measured as the at least one operating parameter. In one example, a measuring orifice plate can be used for this purpose, or the state determination device may include a measuring orifice plate (hereinafter also simply referred to as an orifice plate) as a sensor device. Typically, one or two pressure sensors can be provided to the measuring orifice plate disposed in the hydraulic system. In the case of two pressure sensors, each pressure sensor may, for example, measure the pressure before (upstream) or after (downstream) the orifice plate, or be configured and arranged for this purpose. The pressure sensors or each of the pressure sensors are connected to the identification device so that the pressure sensors can transmit the measured data to the identification device. This can be achieved, for example, through wireless communication, but may also be achieved through wiring connecting the identification device and the pressure sensors.

[0039] Preferably, the operating parameter to be detected is monitored substantially continuously or intermittently, that is, during the movement of the hydraulic cylinder. Here, in some embodiments of the ground compaction equipment according to this invention, the expression "substantially continuous" can mean that at least one operating parameter of the hydraulic cylinder is measured multiple times at defined intervals during the operation of the hydraulic cylinder, with the interval between two measurements typically being shorter than the movement time of the hydraulic cylinder. In particular, the interval between two measurements of at least one operating parameter can be, for example, particularly between 0.1 s and 2 s, typically between 0.1 s and 1 s, and also typically between 0.05 s and 0.2 s. The substantially continuous monitoring of the at least one operating parameter allows for reliable, accurate, and timely information about the state of the edge processing rollers, from which corresponding conclusions can be drawn.

[0040] In some embodiments of the ground compaction equipment according to the present invention, the at least one operating parameter is not monitored substantially continuously during the operation of the hydraulic cylinder. In these embodiments, it is preferable that at least two measurements are performed on the at least one operating parameter of the hydraulic cylinder or the hydraulic system including the hydraulic cylinder to determine or monitor the condition of the edge processing roller. These two measurements, for example, can determine the pressure rise over a defined period of time. The pressure rise can then confirm the contact of the edge processing roller with the material, such as the ground. If the edge processing roller contacts the ground, the pressure in the hydraulic system may, for example, rise in a jump. The operator of the ground compaction equipment can be indicated to the edge processing roller's contact with the material. The indication of contact (or generally an event involving the cladding edge processing device) can be made, for example, by a signal light, audible signal, display, or similar means. In one embodiment of the ground compaction equipment according to the present invention, the preferred continuous measurement of the cylinder pressure of the hydraulic cylinder can also provide an indication of the force acting on the cladding edge processing device, especially the edge processing roller, even without significant adjustment movement. This allows for the determination, and in particular, the identification and recognition of other events or conditions related to the edge processing rollers. In one example, the cutting depth can be determined using the force rise determined during edge cutting. Additionally or alternatively, it can be determined whether excessive force is acting on the coating edge processing device due to, for example, unfavorable turning movements or unexpected spatial conditions. This allows for the detection of misuse or initiating collisions and improves the safety of using the ground compaction equipment according to this invention.

[0041] In one embodiment of the ground compaction equipment according to the present invention, the volumetric flow of the hydraulic cylinder can be determined by pressure measurement, thereby deriving other information such as, for example, the force applied to the edge processing roller, the adjustment stroke achieved by the edge processing roller, and / or possible obstacles or collisions. Specifically, the speed of the hydraulic cylinder in the ground compaction equipment according to the present invention is primarily determined by an orifice plate. The hydraulic system including the hydraulic cylinder operates at a constant working pressure under normal conditions. If the pressure behind the orifice plate is measured, the volumetric flow per unit time can be determined more accurately, especially by implementing an identification device, because the volumetric flow rate through the orifice plate depends essentially only on the pressure difference. In the ground compaction equipment according to the present invention, the volumetric flow through the orifice plate in the case of the hydraulic cylinder is, in particular, essentially independent of the viscosity of the liquid. The adjustment stroke of the hydraulic cylinder can be determined, for example, from the volumetric flow of the hydraulic cylinder and the known cross-sectional area, and, knowing the geometry between the piston rod and the edge processing roller, the adjustment stroke of the edge processing roller can be determined, for example, using the identification device of the state determination device.

[0042] According to one design of the ground compaction equipment described herein, the sensor device may have a volumetric flow sensor or a volumetric flow sensor in the hydraulic system, wherein the volumetric flow sensor is used to detect the volumetric flow rate as at least one operating parameter of the hydraulic cylinder of the ground compaction equipment according to the present invention.

[0043] In a preferred embodiment of the ground compaction equipment according to this invention, more than one operating parameter of the hydraulic cylinder can be detected. For example, the operating time of the hydraulic cylinder, also known as the settling time, can be measured, as well as the pressure before and / or after the orifice plate (as illustrated above). Thus, the position of the edge processing roller can be economically estimated, preferably by measuring from the end position of the settling cylinder or the end position of the coating edge processing device.

[0044] According to one embodiment of the present invention, the hydraulic cylinder may be a differential cylinder having a first piston side and a second piston side. Specifically, a supply flow and an outlet flow of the fluid (typically hydraulic oil) used in the hydraulic cylinder may be provided to each piston side. Furthermore, the condition determination device for the ground compaction equipment according to the present invention preferably further includes: a pump for pumping the fluid used in the hydraulic cylinder; a first pipeline from the pump to the first piston side of the hydraulic cylinder; a first measuring orifice plate having an orifice that narrows the cross-section of the first pipeline; at least one first pressure sensor viewed after the orifice plate in the direction from the pump to the hydraulic cylinder; optionally, a second pressure sensor viewed before the orifice plate in the direction from the pump to the hydraulic cylinder; and a second pipeline from the second piston side to the pump. Additionally, the condition determination device may have a flow sensor for measuring the volumetric flow rate in the second pipeline. With the illustrated arrangement, the pressure in the supply pipeline of the hydraulic cylinder can be measured at one or both locations, which improves the accuracy of determining the condition of the coating edge processing device. The arrangement described herein preferably enables the implementations described above, such as substantially continuous pressure measurement or determining volumetric flow rate via an identification device. The flow sensor used to measure the volumetric flow rate in the second pipeline also contributes to improved accuracy and obtaining the most accurate possible information about the status (e.g., position) of the coating edge processing device. The flow sensor can be configured to complement or replace one or more pressure sensors.

[0045] In one embodiment of the ground compaction equipment of this invention, the state determination device may further include a second measuring orifice plate having an orifice plate that causes the cross-section of the second pipeline to contract. Using the second measuring orifice plate in the second pipeline of the state determination device, the state of the edge processing roller can be determined not only along its path from the end position to the processing position (in short, towards the ground or downwards), but also along its path from the processing position to the end position (or upwards away from the ground on the return journey back to the end position). This provides additional information that may be valuable in the operation of the ground compaction equipment. In one embodiment, by determining the adjustment stroke back to the end position, the stroke towards the end position can be omitted, and the sensor device can start measurements from almost every arbitrary (then known) position. Nevertheless, to improve reliability, the state determination device can be moved to the end position after a defined time interval, or after a certain number of uses of the ground compaction equipment, or even after each use of the ground compaction equipment, in order to calibrate the state determination device in a simple manner.

[0046] Alternatively or additionally, the ground compaction equipment according to this invention may have, in particular, unlockable check valves in the first and / or second pipelines, and / or a third pressure sensor in the first pipeline. These additional or alternative elements of the status determination device are used to improve the accuracy and reliability of the operation of the status determination device of the ground compaction equipment according to this invention. The said or all said check valves may, in particular, be configured to prevent unintentional movement of the hydraulic cylinder.

[0047] Therefore, the sensor and identification devices in the ground compaction equipment according to this invention are preferably configured to identify the state of the edge processing roller (e.g., the adjustment stroke of the hydraulic cylinder, contact with the ground, or collision) essentially based solely on one or more operating parameters of the hydraulic cylinder. These one or more operating parameters may be the pressure in or within the hydraulic system containing the hydraulic cylinder, the volumetric flow rate or volumetric flow through or to / from the hydraulic cylinder, and / or the activity time of the hydraulic cylinder, that is, the length of the corresponding adjustment time interval of the hydraulic cylinder. In other words, the state determination device of the ground compaction equipment according to this invention can identify or estimate the state of the edge processing roller, particularly its adjustment position within the adjustment range, especially without (directly) measuring the state itself, particularly the adjustment stroke. For example, in this invention, the adjustment stroke of the edge processing roller relative to the ground can be determined during operation, and thus the position of the edge processing roller can be determined, without the need (e.g., by a distance sensor) to measure distance or adjustment stroke. The same applies to other states and / or events to be identified, such as the contact of the edge processing roller with the ground or a (potential) collision of the edge processing roller. In the ground compaction equipment of this invention, the additional, potentially contaminated, and calibrated sensors used to determine the state of the edge processing rollers can be omitted.

[0048] In one embodiment of the ground compaction equipment according to the present invention, the status determination device may further include a display for indicating the identified status of the hydraulic cylinder, particularly the identified adjustment stroke of the hydraulic cylinder, and thereby indicating the current position of the edge processing roller. The display may also be configured and controlled such that it indicates collisions and / or current movement / adjustment of the edge processing roller, as well as other conditions. The display may, for example, be located in the cab of the ground compaction equipment according to the present invention, to facilitate operation by the operator, to design a more ergonomic working environment, and to enable the ground compaction equipment to be operated with greater precision (compared to known systems).

[0049] According to some embodiments of the ground compaction equipment of this invention, the state determination device can also be used and applied to automated operation, such as for automated cladding edge processing devices. For example, the ground compaction equipment according to this invention may include a control unit (such as a computer or onboard computer) that performs necessary steps to determine or identify the state of the cladding edge processing device based on one or more operating parameters of a hydraulic cylinder or a hydraulic system containing a hydraulic cylinder. The control unit of the ground compaction equipment according to this invention can, in particular, cause the device to move to an end position after a defined time interval, after a defined number of uses of the ground compaction equipment or cladding edge processing device, before each use of the ground compaction equipment or cladding edge processing device, and / or each time a state description of the cladding edge processing device is queried. This is especially to enable a defined starting point for measurement by a sensor device, from which the measurement can begin, especially always from a defined zero point, and the identification device can determine or calculate the state from the starting point, such as the adjustment stroke of the edge processing equipment, especially the edge processing roller. Furthermore, the identification of the state, the display of the determined state, and / or the control of the cladding edge processing device based on the determined state data can also be performed automatically.

[0050] This invention also relates to an asphalt roller, particularly a hinged or pivot-steering twin-drum roller or rubber-tired roller, which has the ground compaction equipment described above. The features, functions, and advantages of the ground compaction equipment mentioned above are equally applicable to the asphalt roller according to this invention. The same applies to the method according to this invention described below, which also achieves the aforementioned objective, as shown below.

[0051] Although the asphalt roller can be a manually operated asphalt roller, the advantages of this invention are particularly prominent when the asphalt roller is an autonomous or at least semi-autonomous asphalt roller.

[0052] The asphalt roller according to the present invention can be configured, in particular, for implementing the method according to the present invention.

[0053] This invention is suitable for implementing a method for operating a ground compaction device according to the foregoing description, the ground compaction device having a compaction roller, particularly a road roller roller, rotatably supported on a supporting structure, and a cladding edge processing device supported on the supporting structure, the cladding edge processing device including an edge processing roller, an adjusting arm, and an adjusting drive, the edge processing roller being adjustable from an end position to an edge processing position by the adjusting drive, the adjusting drive having a hydraulic system with a hydraulic cylinder. Thus, the ground compaction device according to this invention can be configured to implement the method, particularly as further explained below.

[0054] The method may include at least the following steps: adjusting the coating edge processing equipment from the endpoint position to the edge processing position; during the adjustment, measuring at least one operating parameter of the hydraulic cylinder or hydraulic system using a sensor device; transmitting the at least one operating parameter of the hydraulic cylinder or hydraulic system to an identification device; and identifying the state of the edge processing roller by the at least one operating parameter transmitted by the hydraulic cylinder or hydraulic system, particularly identifying the adjustment stroke of the edge processing roller, the contact point of the edge processing roller with the ground, and / or the collision of the edge processing roller. According to the embodiment of the method described herein, the ground compaction equipment described above can be used in the method. For example, the features of the ground compaction equipment explained in detail above (such as, for example, features concerning the structure of the sensor device, identification device, operating parameters, state determination device, etc.) can be used in this method.

[0055] According to one embodiment, the sensor device is configured to detect at least one operating parameter of the hydraulic cylinder from the following list:

[0056] - The pressure in the hydraulic cylinder or the pressure at a defined location in the hydraulic system;

[0057] - The volumetric flow rate through the hydraulic cylinder; and

[0058] - The activity time of the hydraulic cylinder.

[0059] Therefore, the measurement of at least one operating parameter of the hydraulic cylinder may preferably include: measuring pressure at at least one location of the hydraulic cylinder or at one or more defined locations in the hydraulic system (especially continuously or intermittently); (again, especially continuously or intermittently) measuring the volumetric flow rate through the hydraulic cylinder; and / or measuring the operating time of the hydraulic cylinder. In particular, the measurement can be performed using sensor devices as described above, and typically uses embodiments of the state determination device according to the present invention with matching elements, such as measuring orifice plates, pressure sensors, etc.

[0060] Furthermore, the method may further include defining a starting position before measuring the at least one operating parameter, in which the edge processing roller is in a transport position without contact with the ground. This definition can be made, for example, by moving or swinging an adjusting arm carrying the edge processing roller to a defined stop position or the like. Typically, the starting position corresponds to the end position of the coating edge processing device when it is adjusted to a transport position without contact with the ground. Generally, the starting position can be provided, for example, by moving to a stop, by a locking position, by a stationary position defined by geometry, or the like. Furthermore, the method may also include moving to the defined starting position; and starting measurement from the starting position. This allows for reliable measurements that yield credible results at any time. In other words, a calibration can be performed using the defined starting position, ensuring the accuracy of the measurement.

[0061] According to some preferred embodiments, the method may include: additionally or as a parameter of the hydraulic cylinder, determining the pressure and / or pressure profile in the hydraulic cylinder. This can be achieved, for example, by the embodiments of the state determination device described above. In one embodiment of the method according to the present invention, the method further includes reporting a determined pressure rise in which the pressure exceeds a minimum rise value over a determined time period. In particular, the determined pressure rise (minimum rise value per unit time) can be used to detect or determine the contact of the edge processing roller with the ground or the contact of the edge processing roller with an obstacle. This can prevent damage to the edge processing roller. Furthermore, the method according to the present invention achieves reliable operation of the coating edge processing device because the state and position of the edge processing roller are thus known at all times, and important or abnormal events are detected and may be indicated by a display or alarm.

[0062] In other words, in (especially automated or autonomous) coating edge processing devices, to achieve precise positioning of the edge processing rollers, an upward movement can first be initiated, and this upward movement is particularly sustained for such a long time that it is ensured, regardless of the initial position at the start of the method, that a determined starting position for measurement (i.e., an end position, or the upper end position of the coating edge processing device) has been reached. Afterward, the downward movement of the edge processing rollers can begin, and the volumetric flow rate is measured and integrated, for example, by differential pressure. The adjusted stroke of the hydraulic cylinder can be determined (particularly by the identification device) from the calculated volume and the known cylinder area of ​​the hydraulic cylinder. Typically, a direct relationship between this estimated cylinder stroke and the position of the edge processing rollers is derived based on a known lever ratio. The downward movement of the coating edge processing device can be performed continuously or in stages, since the position of the edge processing rollers is known during the downward movement after initiation.

[0063] Generally, the downward movement can be controlled manually or automatically. In manual mode, the position of the edge processing rollers can be displayed on the operator's monitor in the cab of the ground compaction equipment.

[0064] In automatic mode, the device can be pre-defined and moved to a target location. Status or events can also be displayed, for example, via a monitor. Thus, the system or method according to this invention can be used in conventional, semi-automatic, remotely controlled / remotely operated, and / or autonomous machines.

[0065] Furthermore, in some embodiments, the method may further include the step of setting a predetermined target value for one or more states of the edge processing roller, and setting this value no later than before the state of the edge processing roller is identified by an identification device, wherein the corresponding state is preferably a force acting on the edge processing roller from a hydraulic cylinder. After the corresponding state of the edge processing roller is identified by the identification device, the method may further include comparing the identified state with the corresponding set target value. The comparison may be a comparison of the two values ​​and may also include operational instructions, such as, for example, continuing to lower the edge processing roller or stopping the downward movement of the edge processing roller. This can also be done automatically, for example, by a control unit (e.g., an onboard computer) performing the comparison and possible subsequent operational instructions. Thus, it is possible to check whether the desired target value has been achieved. This, in particular, can further automate the operation of the ground compaction equipment.

[0066] To avoid repetition, the method and the various elements that may be used in the method are described above. Attached Figure Description

[0067] The present invention will now be described in detail with reference to embodiments shown in the accompanying drawings. Wherein, schematically:

[0068] Figure 1 A side view of an asphalt roller is shown;

[0069] Figure 2 An enlarged side view of the coating edge processing device is shown;

[0070] Figure 3 A top view of the coating edge processing device is shown;

[0071] Figures 4 to 8 Schematic diagrams of different states determination devices according to the embodiments described herein are shown;

[0072] Figure 9 A pressure-time diagram is shown for determining the state according to the embodiment described herein; and

[0073] Figure 10 A flowchart of the method is shown. Detailed Implementation

[0074] In the accompanying drawings, identical or functionally equivalent components are indicated by the same reference numerals. Repeating components are not labeled separately in every drawing.

[0075] Figure 1 An asphalt roller 1 is shown, which in this case is a twin-drum roller. The asphalt roller 1 has a machine frame 3. A cab 2 may be part of the asphalt roller 1. The travel mechanism of the asphalt roller includes a load-bearing structure 6 and a compaction roller 5 supported on the load-bearing structure 6, which in this case is a roller drum. The compaction roller 5 is supported on the machine frame 3 by the load-bearing structure 6. Furthermore, the asphalt roller 1 also has a drive motor 4, such as a diesel internal combustion engine or an electric motor, to drive the asphalt roller 1. During operation, the asphalt roller 1 is guided and compacts the ground along the working direction a or in the opposite direction of the working direction, for which the compaction roller 5 rotates about the travel axis of rotation 11. Here, the ground structure includes, for example, a foundation 9 and a ground cover 8 disposed on the foundation 9. The ground cover 8 is, for example, an asphalt layer, which is to be compacted by the asphalt roller 1 to form a road. The foundation 9 is, for example, the ground material disposed beneath the asphalt layer. Figure 1 The asphalt roller 1 includes a ground compaction device 10 according to the present invention, which comprises a bearing structure 6, a compaction roller 5, and a coating edge processing device 7. In the illustrated embodiment, the ground compaction device 10 and, in particular, the coating edge processing device 7 are arranged on the left front of the asphalt roller 1. However, the ground compaction device 10 or the coating edge processing device 7 can also be arranged on the right front, left rear, or right rear of the asphalt roller 1. Furthermore, it is also possible for multiple machine sides to each have a ground compaction device 10 with a coating edge processing device 7.

[0076] exist Figure 2 In the middle, with Figure 1 The same magnified side view shows the coating edge processing device 7. The coating edge processing device 7 is fixed to the support structure 6 of the compaction roller 5. The coating edge processing device has an edge processing roller 12, which is supported on the support structure 6 by a roller holding device 13, here an adjusting arm. The roller holding device 13, configured as an adjusting arm, is rotatably supported on the support structure 6 about a swing axis 30. The edge processing roller 12 is also rotatably fixed to the roller holding device 13, and specifically, is rotatable about a roller rotation axis 15.

[0077] If the adjusting arm of the roller holding device 13 swings about the swing axis 30, the position of the edge processing roller 12 in the vertical direction changes. According to the embodiment described herein, this vertical movement is called the adjusting stroke. Specifically, the coating edge processing device 7, and especially the edge processing roller 12, is adjusted between an end position and an edge processing position by the swinging of the roller holding device 13, in which the edge processing roller 12 is not in contact with the ground, and in which the edge processing roller 12 cuts or presses a portion of the ground coating 8. To drive this adjusting movement of the roller holding device 13 or the adjusting arm, an adjusting actuator 14 is provided, which in the illustrated embodiment is a hydraulic system with a hydraulic cylinder, particularly a double-acting hydraulic cylinder or possibly a differential cylinder. That is, the adjusting actuator 14 adjusts the roller holding device 13 between the end position and the edge processing position.

[0078] The regulating actuator 14 with a hydraulic cylinder is typically connected to a state determination device 31. The state determination device 31 includes a sensor device for detecting at least one operating parameter of the hydraulic cylinder and an identification device for identifying the state of the edge processing roller, particularly for identifying the regulating stroke of the edge processing roller. Here, the identification device is communicatively coupled to the sensor device so that the identification of the edge processing roller's state can be performed based on the data detected by the sensor device. Figures 4 to 8 The different implementations of the arrangement of the state determination device are shown in detail.

[0079] exist Figure 3 The edge processing device 7 is shown in a top view, which allows for a more accurate view of its structure. Thus, from... Figure 3As can be seen, the edge processing roller 12 is rotatably supported on the roller holding device 13, or in other words, on the adjusting arm, via the support shaft 20. Furthermore, the support device or support arm is also rotatably supported on the support shaft 20. Therefore, the support device or support arm can also rotate about the support shaft 20, and in particular about the adjusting axis 19 corresponding to the roller rotation axis 15. The state determination device 31 is connected to the adjusting drive 14, which has a hydraulic cylinder.

[0080] Figure 4 An example of a condition determination device 31 for a ground compaction device 10 according to the present invention, based on an embodiment described herein, is shown. The condition determination device 31 typically includes a pump 32 and a first line 45 leading from the pump to a first piston side 41 of a hydraulic cylinder 40, and a second line 46 leading from the pump 32 to a second piston side 42 of the hydraulic cylinder 40. Figure 4 In the example shown, the state determination device 31 further includes a measuring orifice plate 33 and a pressure sensor 34, both of which are disposed in the first conduit 45, and they can in particular form a sensor device according to an embodiment of the present invention. Figure 4 In the exemplary embodiment shown, a pressure sensor 34 is only disposed downstream of the orifice plate 33. A substantially constant system pressure can exist in the hydraulic system. The pressure can now be determined after (or downstream of) the orifice plate 33, or in particular, the pressure drop across the orifice plate 33 (i.e., the pressure drop between the system pressure and the hydraulic cylinder pressure), thereby allowing for a more accurate determination, for example, of the identification device 60 according to the embodiment described herein. It is particularly noteworthy here that the volumetric flow through the orifice plate depends substantially only on the pressure difference. Thus, in Figure 4 As can be seen, the operating parameters of the hydraulic cylinder 40 (here, the operating parameters are the pressure after the orifice plate 33) determine the stroke of the piston rod 43, thereby achieving the adjustment stroke of the edge processing roller 12.

[0081] In the second pipeline 46 of the state determination device 31, supplemented or alternatively located to the orifice plate 33 and / or pressure sensor 34, a volumetric flow meter 38 may also be provided, which can measure the volumetric flow toward or away from the second piston side 42 of the hydraulic cylinder 40. Furthermore... Figure 4 The connection between the edge processing roller 12 and the hydraulic cylinder 40 via the piston rod 43 and bearing 44 is also shown. Figure 4 The diagram also shows an adjusting arm 18, on which the edge processing roller 12 is fixed. When the piston rod 43, which is connected to the bearing, moves, the bearing 44 enables the edge processing roller 12 to move along the adjusting stroke, especially at least partially vertically.

[0082] exist Figure 4 The diagram shows an identification device 60 of the ground compaction equipment 10 according to the present invention, which is connected, by dashed lines, to a pressure sensor 34 in the first pipeline 45 and a flow sensor 38 in the second pipeline 38. Here, the pressure sensor 34 and the flow sensor 38 are exemplarily present as part of the sensor device of the state determination device 31. Alternatively or supplementarily, a timer 55 may also be part of the sensor device and may enable the degree of adjustment movement of the edge processing roller 12 to be determined solely by, for example, the adjustment duration of the hydraulic cylinder 40. In some embodiments, the identification device 60 may be connected to all the sensors of the state determination device 31.

[0083] Other supplementary or alternative elements of the state determination device 31 according to the embodiment described herein may include, for example, an adjustable pressure regulating valve 36 and a flow element 37 for regulating the flow rate in the corresponding direction. This (flow rate) may also be determined by means of a timer 55 and may be used to determine the adjustment stroke.

[0084] Figure 5 This illustrates another embodiment of the state determination device 31 of the ground compaction equipment 10 according to the present invention. Figure 5 In the embodiment shown, a second pressure sensor 35 is disposed in front of (or upstream of) the orifice plate. The second pressure sensor 35 can verify the expected pressure during normal operation of the hydraulic system and correct it if necessary. This also allows for the detection of small deviations in the pressure level and improves the accuracy of determining the state of the edge processing roller 12.

[0085] exist Figure 6 Another embodiment of the state determination device 31 of the ground compaction equipment 10 according to the present invention is shown. (In addition to those already referenced...) Figure 4 and 5 In addition to the components described, the state determining device includes check valves 50 in the first and second pipelines, respectively, and a third pressure sensor 51 in the first pipeline 45, preceding the check valves 50. The third pressure sensor may also replace the pressure sensor 35. Furthermore, in Figure 6 The diagram also shows a suspension structure 52 for the hydraulic cylinder 40 on a rigid system, which can be provided, for example, by a load-bearing structure of a ground compaction device according to the present invention. A check valve 50 prevents backflow of hydraulic fluid (typically oil) and thereby ensures proper positioning of the edge processing roller 12.

[0086] Figure 7 This illustrates another embodiment of the state determination device 31 of the ground compaction equipment 10 described herein, according to the present invention. Figure 7In the state determination device 31 shown, the second pipeline 46, connected to the second piston side 42 of the hydraulic cylinder 40, also has a measuring orifice plate 53. Additionally, another pressure sensor 54 is also installed in the second pipeline 46 to measure the pressure after (or downstream of) the orifice plate 53. In this way, the desired state of the edge processing roller 12 can be determined more accurately. For example, the pressure in the second piston side can be precisely determined, and the adjustment stroke of the edge processing roller 12 can be determined by means of the identification device. Here, in particular, the substantially vertical but upwardly extending adjustment stroke of the edge processing roller 12 can also be determined. Alternatively or supplementarily, pressure sensor 54 can be used in place of or in lieu of pressure sensor 34.

[0087] Although not shown in all the figures, those skilled in the art will understand that the identification device 60 (e.g., in the sensor device of the ground compaction equipment according to the present invention) is connected to the sensor device of the ground compaction equipment according to the present invention. Figure 4 (As shown in the diagram) It also exists in other embodiments. The identification device can in particular be connected to some or all of the sensors that belong to the sensor device family, such as, for example, pressure sensors, flow sensors, timers and the like.

[0088] Figure 8 Another example of the state determination device 31 of the ground compaction equipment 10 according to the present invention is shown. Figure 8 The state determination device 31, as the (particularly the only) element of the sensor device, has a timer 55 that measures the activity time of the hydraulic cylinder 40 of the ground compaction equipment 10 according to the present invention. Figure 8 In this embodiment, timer 55 exemplarily measures the movement time of piston rod 43, and this time can be transmitted to identification device 60 (shown in dashed lines) via a connection. Additionally, the timer can also measure the activity time of pump 32, or the activity time of other elements representing the activity of the hydraulic cylinder. Identification device 60 can provide an estimate of the stroke (adjustment stroke) traveled by the hydraulic cylinder from the measured time. Thus, in particular, the stroke traveled by edge processing roller 12 can also be estimated based on known geometry.

[0089] Other embodiments of the present invention not shown in the accompanying drawings may include, for example, combinations of the systems shown, such as combinations of sensors (e.g., pressure sensors, timers, and / or flow sensors) shown in different drawings.

[0090] The hydraulic system of the edge processing device can typically be connected to the existing hydraulic system of the ground compaction equipment. Alternatively or supplementarily, a decentralized system, particularly an electro-hydraulic system, can also be provided, comprising, in particular only, an electrically driven hydraulic pump and the hydraulic cylinder, which are particularly directly connected to each other in a flow-guiding manner.

[0091] The accompanying drawings described above primarily illustrate the identification of the adjustment stroke as the state of the edge processing device, while Figure 9 This schematically illustrates how identification of another state, such as contact with the ground on a material (or asphalt layer), can be performed. Figure 9 A graph is shown in which pressure p is plotted over time t. Pressure can be determined, for example, by... Figures 4 to 8 The sensor device shown and described herein is used. Figure 9 In the example shown, the pressure initially evolves at a substantially constant value p1. Then, at time t1, the pressure rises very rapidly to a value p2. This rise is relatively steep and ends at time t2. The values ​​of p1, p2, t1, and t2 are derived from the conditions of the ground compaction equipment, but also from the ground and the edge processing rollers. An identification device that obtains these values ​​from the sensor device can, for example, infer from the graph shown that the edge processing rollers have touched the ground and recognize this state. Figure 9 In the example shown, this could be the start of a cutting or extruding process.

[0092] In some implementations, the identification device may then report the status, for example, on a display, or activate an alarm, such as a visual or audible alarm, to notify the driver of the ground compaction equipment of the ground contact event.

[0093] According to some embodiments described herein, the pressure may increase further at the same slope or become gentler when a collision occurs or the material to be cut changes. This can also be identified by the identification device of this invention by comparison with stored data or by evaluation of a schema.

[0094] Additionally or supplementarily, the identification device may also have stored data about the expected state, such as a time period or adjustment stroke after which the edge processing roller is expected to touch the ground. If a strong pressure rise occurs at this time, unforeseen, the identification device can, for example, report a collision and thereby prevent further damage, and / or adjust the edge processing roller to a safe position, particularly to a raised end stop.

[0095] Figure 10A flowchart of the method is shown, with the ground compaction equipment 10 ideally configured to perform the method. The method 65 includes adjusting the cladding edge processing device 7 from an end position 61 to an edge processing position, and during adjustment, measuring 62 at least one operating parameter of the hydraulic cylinder 40 using a sensor device. The at least one operating parameter of the hydraulic cylinder 40 may be, for example (especially since the last arrival at the end position) the activity time of the hydraulic cylinder, the pressure in the hydraulic cylinder or one of the supply lines, or the volumetric flow rate of the hydraulic fluid in one of the supply lines. The method further includes: transmitting 63 the at least one operating parameter of the hydraulic cylinder 40 to an identification device 60; and identifying 64 the state of the edge processing roller 12 by the transmitted at least one operating parameter of the hydraulic cylinder, especially identifying the adjustment stroke of the edge processing roller 12, the contact of the edge processing roller 12 with the ground, and / or the collision of the edge processing roller 12. It is now important that the operating parameters of the hydraulic cylinder or the hydraulic system containing the hydraulic cylinder are used to determine the state of the edge processing roller; thus, the parameters of an element of the ground compaction equipment are measured, and these parameters are not inherently related to the detection of the state of the edge processing roller. However, the identification device uses these parameters of the first element (here, the hydraulic system) to determine the state of the second element (here, the edge processing roller). This offers several advantages, particularly compared to direct distance measurement of the edge processing roller. For example, sensors in a hydraulic system (i.e., in the lines leading to the hydraulic cylinder) are less susceptible to contamination compared to sensors that directly measure the distance to the edge processing roller. Moving to the endpoint can also be considered a form of calibration; conversely, distance sensors that directly measure the distance to the edge processing roller must be calibrated periodically, during which the edge processing unit typically needs to be paused.

[0096] It should be noted that all the features described herein for ground compaction equipment or its components can also be applied to the methods of the embodiments described herein.

Claims

1. A ground compaction device, the ground compaction device being used to compact a ground cover layer (8), and the ground compaction device... - A compaction roller (5) having at least one rotatable bearing structure (6) on the ground compaction equipment (10) about a travel rotation axis (11) extending horizontally and transversely to the working direction (a), the compaction roller comprising a cylindrical outer peripheral surface that rolls on the ground during compaction operation. - A coating edge processing device (7) is provided on the support structure (6), the coating edge processing device including an edge processing roller (12), an adjustable roller holding device (13), and an adjustment driver (14), the adjustable roller holding device (13) being supported on the support structure (6) by means of the adjustment driver (14) and being driven together with the edge processing roller (12) from the end position to the edge processing position. -in, The regulating actuator (14) has a hydraulic system, which has a hydraulic cylinder (40). Its features are, The ground compaction equipment has a state determination device (31) for the overlay edge processing device (7), the state determination device (31) including the following components: - A sensor device for detecting at least one operating parameter of the hydraulic system having a hydraulic cylinder (40); and - Identification device (60), the identification device being configured to identify the state of the edge processing roller (12) based on at least one operating parameter of the hydraulic system having a hydraulic cylinder (40).

2. The ground compaction equipment according to claim 1, characterized in that, The adjustable roller holding device is an adjusting arm.

3. The ground compaction equipment according to claim 1, characterized in that, The identification device is configured to identify the adjustment stroke of the edge processing roller (12), the contact of the edge processing roller (12) with the ground, and / or the collision of the edge processing roller (12) based on at least one operating parameter of the hydraulic system having the hydraulic cylinder (40).

4. The ground compaction equipment according to claim 1, characterized in that, The sensor device is configured to detect at least one operating parameter of the hydraulic cylinder (40) from the following list: - The pressure in the hydraulic cylinder (40) or the pressure at a defined location in the hydraulic system; - The volumetric flow rate through the hydraulic cylinder (40); and - The activity time of the hydraulic cylinder (40).

5. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The sensor device is configured to continuously detect at least one state quantity of the hydraulic system having a hydraulic cylinder (40).

6. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The sensor device has at least one of the following characteristics: - Measuring orifice plate (33). - Flow sensor (38). - At least one pressure sensor (34; 35). - Ultrasonic flow sensor, and / or - Timer (55).

7. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The identification device is designed to determine the volumetric flow rate of the hydraulic cylinder (40) using data from the sensor device, and to determine the adjustment stroke of the hydraulic cylinder (40) using the volumetric flow rate and the cross-sectional area of ​​the hydraulic cylinder (40).

8. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The status determination device (31) further includes a display for displaying the identified status of the hydraulic cylinder (40).

9. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The status determination device (31) further includes a display for displaying the identified adjustment stroke of the hydraulic cylinder (40).

10. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The sensor device and the identification device (60) are configured to identify the state of the edge processing roller (12) based on the following parameters: - The pressure in the hydraulic cylinder (40) or the pressure at a defined location in the hydraulic system; - The volumetric flow rate through the hydraulic cylinder (40); and - The activity time of the hydraulic cylinder (40).

11. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The sensor device and the identification device (60) are configured to identify the adjustment stroke of the hydraulic cylinder (40) based on the following parameters: - The pressure in the hydraulic cylinder (40) or the pressure at a defined location in the hydraulic system; - The volumetric flow rate through the hydraulic cylinder (40); and - The activity time of the hydraulic cylinder (40).

12. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The sensor device and the identification device (60) are configured to identify the state of the edge processing roller (12) based solely on the following parameters: - The pressure in the hydraulic cylinder (40) or the pressure at a defined location in the hydraulic system; - The volumetric flow rate through the hydraulic cylinder (40); and - The activity time of the hydraulic cylinder (40).

13. The ground compaction equipment according to any one of claims 1 to 4, characterized in that, The hydraulic cylinder (40) is a differential cylinder having a first piston side (41) and a second piston side (42), and the state determination device (31) further includes the following: - Pump (32); -A first pipeline (45) from the pump to the first piston side (41) of the hydraulic cylinder (40). - Measuring orifice plate (33), the measuring orifice plate having an orifice plate (33) that causes the cross-section of the first pipeline (45) to contract; -Observe along the flow direction from the pump (32) to the hydraulic cylinder (40) at least one first pressure sensor (34) downstream of the orifice plate (33). -Observe at least one second pressure sensor (35) upstream of the orifice plate (33) along the flow direction from the pump (32) to the hydraulic cylinder (40). - A second pipeline (46) from the second piston side (42) to the pump (32); and - Flow sensor (38) for measuring volumetric flow rate in the second pipeline (46).

14. The ground compaction equipment according to claim 13, characterized in that, The state determination device (31) further includes at least one of the following features: - Second measuring orifice plate (33), the second measuring orifice plate having an orifice plate that causes the cross-section of the second pipeline (46) to contract; - At least one check valve (50) in the first pipeline and / or the second pipeline.

15. An asphalt roller, characterized in that, The asphalt roller has ground compaction equipment according to any one of claims 1 to 14.

16. The asphalt roller according to claim 15, characterized in that, The asphalt roller is a double-drum roller with articulated steering or pivot steering.

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