Measuring device and method for continuously sensing height reference

Abstract

The invention relates to a measuring device (4, 4 ', 4' ') for a paver (1), comprising a height sensor (7) and a pivoting module (9) which is mounted so as to be pivotable on the height sensor (7) about a pivot axis (8) and which has a sensing device (10) with at least two feeler levers (11a, 11b) for sensing a cable (6) stretched along a paving section of the paver (1) as a height reference, wherein the two feeler levers (11a, 11b) are configured such that one of the two feeler levers (11a, 11b) is in a first orientation (14a, 14b) in which it is positioned to rest on the cable (6) at least constantly when the other of the two feeler levers (11a, 11b) is pressed into its second orientation (15a, 15b) spaced from the cable (6) by means of the support (5) for tensioning the cable (6).

Description

Technical Field

[0001] This invention relates to a measuring device for a paver. Furthermore, this invention relates to a method for continuously sensing a height reference. Background Technology

[0002] It is known that a mechanical height sensor attached to the screed of a paver can be used to mechanically sense cables or sensing wires stretched along the paving section of the paver in order to detect any unevenness in the roadbed on which the paver moves by contact sensing, and based on this, to level the height-adjustable screed so that a level paving layer can be produced.

[0003] One problem with conventional mechanical height sensors is their potential to get stuck in tension blocks—that is, in supports installed along the paving section for tensioning cables or guide wires. Therefore, currently, conventional height sensors are either deactivated in the area of ​​the corresponding clamping block, or the operator walking alongside the paver pushes the clamping block away to prevent the height sensor from getting stuck. However, temporarily deactivating the height sensor can lead to paving errors because the leveling system does not respond to unevenness in the subgrade during the deactivation interval. Pushing away the supports is physically demanding for the operator and causes the cable to slack along the paving section, requiring multiple retensioning attempts. However, without taking such problematic measures, the screed leveling may react when the mechanical height sensor is pushed away or lifted from its normal guide at the support, potentially resulting in undesirable profile errors in the paved layer.

[0004] DE 21 2024 000 014 U1 discloses a mechanical height sensor for sensing a reference in the form of a cable or guide wire stretched along a paving section of a paver. The height sensor includes a contact rod in the form of a rotating star, which can rotate away from the cable and rise above the support when it impacts a support during paving operation. As the rotating star rotates away from the support, an upper sensor member of the height sensor forming the rotating star moves upward on an ascending inclined guide of a lower sensor member, causing the rotating star impacting the support to space away from the cable and rise above the support. The rotating star then lowers and re-contacts the cable as it further rotates along a descending inclined guide of the lower sensor member on the support. While this allows the rotating star to bypass supports positioned along the paving section without human intervention, a drawback of this measuring device is that the sensors attached to the rotating star are not at least temporarily resting on the cable at the corresponding support, meaning that the measurement process for mechanically scanning the height reference at the corresponding support is interrupted. Therefore, the unevenness in the roadbed, especially in the area of ​​the support on which the paver moves, is not taken into account in the measurements used for leveling screeds, or is simply not recorded accurately, which may make the leveling inaccurate. Summary of the Invention

[0005] The object of the present invention is to provide a measuring device and a corresponding method that improve upon the shortcomings described in the context of the prior art.

[0006] This invention relates to a measuring device for a paver, comprising a height sensor and a pivoting module mounted on the height sensor for pivotability about a pivot axis. The pivoting module includes a sensing device with at least two contact rods for sensing a cable tensioned along a paving section of the paver as a height reference. The invention provides that the two contact rods are configured such that, at least always, when one of the two contact rods is pressed into a second orientation spaced apart from the cable by a support member for tensioning the cable, one of the two contact rods is positioned in a first orientation resting on the cable.

[0007] Therefore, at least one of the two contact rods is always in contact with the cable, even if one of the two contact rods strikes the support and thereby loses contact with the cable. Thus, the measuring device according to the invention allows for continuous contact-based sensing even when the cable passes the support. In other words, the measuring device according to the invention maintains contact with the cable without losing contact at the support. Even in the area of ​​the support, this ensures uninterrupted sensing of the cable, i.e., continuous guidance of the sensing device along the cable, enabling uninterrupted recording of measurements, and therefore, allowing for more precise leveling of the screed placed at the paver during paving operations.

[0008] During the paving operation of the paver, if one of the two contact rods comes into contact with a support, such as a tensioning block used to tension the cable or a guide wire used instead of the cable, that contact rod may yield to the support due to the contact, i.e., be pushed away from the support, thereby separating it from the cable. The other of the two contact rods either remains resting on the cable or moves onto the cable before the contact rod pushed away from the support temporarily breaks its contact with the cable. Therefore, the sensing device according to the invention always has at least one of the two contact rods in contact with the cable, enabling more precise leveling.

[0009] The contact rod is preferably a separate contact rod, which is mounted to rotate about separate axes of rotation (particularly a vertical axis of rotation) spaced apart from each other. This two-part design of the two contact rods allows one of the two contact rods to yield at the support and thus be spaced apart from the cable, while the other contact rod is still positioned to rest on the cable at different locations along the cable, thereby ensuring continuous cable sensing contact. Thus, the two separate contact rods perfectly complement each other to achieve continuous cable sensing contact along the paving section.

[0010] According to one embodiment of the invention, the distance between the two axes of rotation can be varied. The contact rods can then be installed at different intervals. This allows the contact rods to be installed at a selected distance along the paving section, ensuring that the contact rods do not simultaneously pass over the support. This allows the contact rods to be installed far enough apart, for example, 30 cm, 40 cm, or 50 cm, that the contact rods do not simultaneously lose contact with the cable during use.

[0011] Preferably, the contact rod is mounted such that it can pivot in the horizontal plane. To ensure that the contact rod is positioned relative to and on the cable in a preferred orientation, the contact rod can be adjusted within a predetermined pivot range, preferably incrementally. This can be done in such a way that the contact rod may tend to present a lateral position on the cable, or automatically return to a certain position once the contact rod has passed the support.

[0012] One variation specifies that at least one contact bar exists in the form of a single bar or multiple bars. In the single-bar form, the contact bar is configured as a compact bar and can be installed individually and spaced apart from each other on the side of the paver, particularly at the height of the lateral distribution auger in front of the paver's screed and / or on its side, such that the contact bar rests on the cable in a manner transverse to the paving direction and facing sideways. In the multiple-bar form, the contact bar can be configured as individual rotating star-shaped elements. For leveling purposes, the rotating star-shaped elements can be installed spaced apart from each other on the side of the paver, particularly at the height of the lateral distribution auger in front of the paver's screed and / or on its side. The sensing device with contact bars configured as rotating star-shaped elements provides a particularly stable structure.

[0013] It is conceivable that the individual contacts of the rotating star-shaped components are configured such that when a contact on one of the two rotating star-shaped components contacts the cable support, the contact can rotate about its axis of rotation, such that the contact only leaves the cable when the adjacent contact on the rotating star-shaped component has reached the cable, thus achieving seamless contact replacement at each rotating star-shaped component. Because this allows two contacts to rest on the cable at any time, the rotating star-shaped components can interact to prevent the sensing device from tilting.

[0014] One variation specifies that the contact rod, particularly when present as a single contact rod, is pre-tensioned to a first orientation under spring load. This allows the contact rod to automatically pivot back to its first orientation after passing the support, so as to rest on the cable again.

[0015] It is conceivable that the contact rod is in the form of a double rod, which is mounted to rotate about a single axis of rotation. The measuring device may also include several of the double rods. This double rod operates such that once one of the two contact rods formed thereon strikes a support, that contact rod rotates about a common axis of rotation, such that it only moves away from the cable when the other contact rod has rotated far enough to be positioned on the cable. Through this double rod, the contact rods formed thereon exchange positions on the cable, such that one contact rod rests on the cable without pivoting out along the cable, and by pivoting out that contact rod, the other contact rod (i.e., both contact rods) also rests on the cable, at least temporarily. Once the contact rod pushed away by the support has passed the support and is no longer pushed away by the support, it can be rotated back to its first orientation by a spring load, causing the other contact rod to lift off the cable again. Then, the other contact rod resting on the cable pivots away from the cable, such that it only moves away from the cable once the previously pushed-away contact rod has rotated back far enough to rest on the cable again. Even when pivoting back like this about the axis of rotation, the two contact rods rest together on the cable at least temporarily as they pivot outward and inward in opposite directions, making the change in position of the two contact rods on the cable seamless, meaning that at least one of the two contact rods is always resting on the cable.

[0016] In the case of two rods, it would be useful to mount one rod in a first orientation and the other in a second orientation, pre-tensioning the sensing cable under spring load. This spring-loaded mounting allows the two rods on the cable to reliably change position such that, as they pass the support, they are at least temporarily positioned simultaneously resting on the cable; that is, by pushing one rod away at the support, the other rod rotates onto the cable and reaches it before the pushed-away rod is separated from the cable.

[0017] It is advantageous if the contact rods are aligned with each other at an angle greater than 80° and less than 100°, preferably at right angles. In this arrangement, the two contact rods on the dual contact rods can be used for continuous cable sensing because, when passing the support, the two contact rods are positioned relative to each other such that they are at least simultaneously and temporarily resting on the cable, thereby ensuring continuous cable sensing contact. The contact rods are preferably formed to be at least 10 cm long, more preferably at least 20 cm long.

[0018] The sensing device preferably includes at least two spaced-apart rods, which are in a first orientation when sensing the cable, while a third rod is in a second orientation. This prevents the sensing device from tilting because the two rods resting on the cable provide sufficient support to keep the sensing device in a predetermined pivot position, particularly horizontally aligned on the cable.

[0019] According to one embodiment of the invention, the pivoting module forms a parallelogram hinge for carrying the sensing device. The parallelogram hinge ensures a robust structure for the pivoting module, allowing it to hold the sensing device in the desired horizontal pivoting position.

[0020] Specifically, the parallelogram hinge includes a mounting rail for the contact rod. The mounting rail provides a stable base for the attached contact rod, allowing the contact rod to selectively avoid the support. The mounting rail can be horizontally aligned at the parallelogram hinge to position the contact rod mounted thereon in a horizontal plane.

[0021] It is conceivable that the contact rods are mounted to be adjustable along a mounting track, thereby adjusting the distance between the contact rods, i.e., the distance between their axes of rotation. This allows the contact points of the contact rods on the cable to be spaced at different distances to accommodate different support spacings. This prevents the contact rods from passing over the supports simultaneously. For this purpose, an extendable mounting track can be provided.

[0022] It is conceivable that the parallelogram hinge has a counterweight unit for the sensing device. Using the counterweight unit, the pivoting module can be positioned at the desired pivot point to guide the sensing device resting on the cable at a predetermined height above the roadbed. Specifically, the sensitivity of the measuring device can be adjusted using the counterweight unit. Preferably, the force applied by the counterweight unit is variable. The counterweight unit may include plate segments that can be attached and removed for this purpose.

[0023] One variation specifies that the contact rod has an upward-sloping surface at its outer end. This helps to reliably guide the contact rod back onto the cable.

[0024] According to one embodiment of the invention, the sensing device includes at least one stop element for holding the contact rod in a predetermined orientation relative to the cable, particularly in an orthogonal lateral orientation relative to the cable. This allows the contact rod to be guided substantially perpendicular to the cable's direction during cable sensing, thereby ensuring reliable sliding of the contact rod on the cable and preventing the contact rod from directly impacting the clamping block.

[0025] It is conceivable that a stop element, for example, defines a latching position on a contact rod that exists in the form of a rotating star, or exists as an end stop on a single or double rod, to prevent the contact rod from pivoting back transversely to the direction of the cable.

[0026] Specifically, the contact rods can be used to sense the cable on both the right and left sides of the paver. It is conceivable that multiple rods arranged in the form of a rotating star are configured to sense the cable in both the right and left directions of travel of the paver. Alternatively, corresponding left or right versions of the rotating star can be provided for sensing performed on both the right and left sides of the machine.

[0027] Advantageously, the single or double lever is configured such that it can pivot from sensing in the direction of travel on the right side of the paver or switch to sensing in the direction of travel on the left side of the paver. Alternatively, a version is provided for use on the left side of the paver or on the right side of the paver.

[0028] The present invention also relates to a paver having at least one mechanical measuring device according to the invention. This measuring device enables continuous contact-based height measurements to be performed relative to a reference (e.g., a cable or guide wire) stretched along the paving section during the paver's paving operation, thereby achieving precise leveling of the paver screed. This contact-based sensing of the height reference has the advantages of being unaffected by weather and operationally stable, particularly compared to non-contact measuring systems (e.g., ultrasonic sensors).

[0029] The present invention also relates to a method for continuously sensing a cable stretched along a paving section of a paver as a height reference using a measuring device employing a sensing device having at least two contact rods for sensing the cable. According to the method of the invention, one of the two contact rods is always in a first orientation resting on the cable while the other of the two contact rods is pushed away from the cable by a support member of the tensioned cable to a second orientation spaced apart from the cable. This ensures that at least one of the two contact rods is always in contact with the cable, even when the contact rod must pass over the cable support member. This allows for continuous sensing of the cable by the sensing device, enabling continuous height measurement to be used for leveling the screed of the paver for precise leveling of the screed to produce a level paving layer. Attached Figure Description

[0030] The invention will be explained in more detail using the embodiments shown in the accompanying drawings, wherein:

[0031] Figure 1 A side view of a paver with measuring devices for sensing the guide wire or cable respectively is shown.

[0032] Figure 2 A rear view of a paver with measuring devices for sensing the guide wire or cable respectively is shown.

[0033] Figure 3 The measuring device for sensing the guide wire or cable separately is shown in a separate view.

[0034] Figures 4A to 4C The use of each is shown separately. Figure 3 The measuring device shown continuously senses the guide wire or cable.

[0035] Figures 5A to 5D Continuous sensing of the guide wire or cable using alternative measuring devices is shown respectively, and

[0036] Figure 6 A measuring device according to yet another embodiment is shown.

[0037] The technical features in all the accompanying drawings have the same reference numerals. Detailed description of implementation methods

[0038] Figure 1 A side view of a paver 1 during paving operation in the paving direction R is shown. The paver 1 includes a height-adjustable screed 2 for producing new paving layers 3 in the paving direction R. A measuring device 4 is attached to the screed 2. This measuring device is located on the side of a lateral distribution auger, which is positioned in front of the screed 2 and used for lateral distribution. The measuring device 4 is used to sense the cable 6 or guide wire stretched along the paving section via a support member 5 in the paving direction R.

[0039] During the paving operation of paver 1, the measured values ​​recorded by measuring device 4 are stored as actual values ​​for use by the automatic leveling system installed on paver 1. Based on this, the height position of screed 2 can be controlled in an open-loop or closed-loop manner by a leveling cylinder attached to the front traction point of screed 2, so as to generate a level paving layer 3 by leveling the screed. For precise leveling of screed 2, it is advantageous to continuously sense the cable 6 using measuring device 4, even as it is guided past the corresponding support 5.

[0040] Figure 2 A rear view of paver 1 is shown. Figure 2 The sensed cable 6 is shown to be located outside the paving area, i.e., on the side of the screed 2.

[0041] Figure 3 A variation of the measuring device 4 is shown in a separate view. The measuring device 4 includes a height sensor 7. A pivoting module 9 is mounted so as to pivot about a pivot axis 8 on the height sensor 7. To detect the pivoting position of the pivoting module 9, a rotational position sensor (not shown) is added to the height sensor 7, whose measurement signal can be stored as an actual value for use by an automatic leveling system to compensate for unevenness in the roadbed sensed by the measuring device 4 on which the paver 1 moves.

[0042] The lower end of the pivot module 9 is equipped with a sensing device 10 having two contact rods 11a and 11b. Figure 3 In the middle, the contact rods 11a and 11b are configured as single rods 12a and 12b, each rod being mounted to rotate about the vertical rotation axis 13a and 13b.

[0043] exist Figure 3 In the middle, the two contact rods 11a and 11b are respectively preloaded under spring load with a first orientation 14a and 14b. According to Figure 3 As shown in the dashed diagram, when the two contact rods 11a and 11b encounter the support member 5 used for tensioning the cable 6, they can rotate around their respective rotation axes 13a and 13b from the first orientation 14a and 14b to the second orientation 15a and 15b. Once the contact rods 11a and 11b have passed the support member 5, they can pivot again from the pivoting second orientation 15a and 15b back to the first orientation 14a and 14b due to the spring load.

[0044] Figure 3 The pivot module 9 shown forms a parallelogram hinge 16. A sensing device 10 is mounted at the lower end of the pivot module 9. The parallelogram hinge 16 includes a mounting rail 17 on which two contact rods 11a and 11b are spaced apart. Furthermore, the pivot module 9 includes a counterweight unit 18 disposed on the side of the parallelogram hinge 16 opposite to the mounting rail 17. The parallelogram hinge 16 includes a first leg 19a, one end of which is mounted to pivot about a pivot axis 8 on a height sensor 7 and connected to a rotational position sensor (not shown). Additionally, the parallelogram hinge 16 includes a second leg 19b rotatably attached to a support 20 mounted on the height sensor 7. The counterweight unit 18 is disposed on the second leg 19b. The mounting rail 17 is hinged to the lower ends of the two legs 19a and 19b.

[0045] Figure 3The measuring device 4 shown can be supplemented by a third contact rod rotatably mounted on a mounting rail 17 between the contact rods 11a and 11b. Specifically, the measuring device 4 can extend along the mounting rail 17. This means that one or more extension rails can be attached to the mounting rail 17 to attach one or more contact rods 11a and 11b as needed. It is conceivable that the mounting rail 17 is already equipped with retractable extension rails for attaching at least one additional contact rod 11a and 11b. This allows any number of contact rods 11a and 11b to be provided for the sensing device 10 as needed, for example, three separate contact rods 11a and 11b, such that when sensing the cable 6, at least two spaced-apart contact rods 11a and 11b are positioned in a first orientation 14a and 14b resting on the cable 6, while the third contact rod pivots outward at the support 5 to avoid the support 5. This prevents the measuring device 4 from tilting.

[0046] Figure 3 The contact rods 11a and 11b shown have upward-facing inclined surfaces 25a and 25b, respectively. These inclined surfaces 25a and 25b help the contact rods 11a and 11b pivot back onto the cable 6 and prevent the contact rods 11a and 11b from pivoting back below the cable 6.

[0047] Figure 4A A measuring device 4 for continuously sensing cable 6 is shown. When the measuring device 4 moves forward along the paving direction R, Figure 4A The contact rod 11a shown pivots about the axis of rotation 13a at the support 5 from its first orientation 14a. Figure 4A In the middle, another contact rod 11b is positioned as the first orientation 14b. Figure 4A In the middle, the two contact rods 11a and 11b are still resting on the cable 6.

[0048] As the paver 1 continues to move, the measuring device 4 also moves forward along the paving direction R, thereby pushing the contact rod 11a further away by the support member 5. This causes the contact rod 11a to pivot away from the cable 6, i.e., no longer resting on the cable 6. This is in Figure 4B As shown in the image. In this snapshot, only the other contact bar 11b remains resting on cable 6.

[0049] As the paver 1 continues to move, the contact rod 11a can be pulled past the support member 5, and as... Figure 4C As shown, it automatically pivots back to its initial position, namely the first orientation 14a, about its rotation axis 13a, where the contact rod 11a rests again on the cable 6. Then, according to... Figure 4C Another contact bar 11b strikes the support 5 that has already been passed by contact bar 11a, and is pushed out of its first orientation 14b, spaced apart from the cable 6, and manipulated to pass through the support 5, just as the previous contact bar 11a had done.

[0050] Figures 4A to 4C It is shown that when at least one of the two contact rods 11a, 11b is pressed into a second orientation 15a, 15b spaced apart from the cable 6 by a support 5 for tensioning the cable 6, one of the two contact rods 11a, 11b is in a first orientation 14a, 14b in which it is positioned resting on the cable 6.

[0051] according to Figures 4A to 4C The principle of continuous cable sensing of the contact rods 11a and 11b shown can also be used. Figures 5A to 5D The illustrated embodiment is used to implement this.

[0052] Figures 5A to 5D The measuring device 4' is shown in a schematic plan view, on which the contact rods 11a and 11b exist in the form of a double rod, which is mounted to be rotatable about a single axis of rotation 21.

[0053] In principle, the measuring device 4' is installed on the basis of the data to be measured. Figure 5A Above the pre-tensioned cable 6 shown in the diagram. Contact rod 11a rests on the cable 6, i.e., is positioned in the first orientation 14a. Another contact rod 11b is positioned in the second orientation 15b, because it does not rest on the cable 6, but is spaced apart from it.

[0054] exist Figure 5B In the process, contact rod 11a strikes support member 5 and is pushed away by support member 5, causing contact rods 11a and 11b to rotate together around rotation axis 21. This causes contact rod 11b to pivot onto cable 6. According to... Figure 5B The snapshot shown shows the paving operation process, with the two contact rods 11a and 11b positioned on the cable 6.

[0055] Figure 5C As shown, as the paver 1 continues to move forward, the contact rods 11a and 11b continue to rotate around the rotation axis 21, causing... Figure 5C At the indicated time point, contact rod 11a is spaced apart from cable 6, while contact rod 11b rests on cable 6.

[0056] The continued movement of paver 1 causes contact rods 11a and 11b to... Figure 5D Pivot together around axis 21 Figure 5A The initial position shown allows the contact rod 11a to rest on the cable 6 again.

[0057] Figures 5A to 5DThe measuring device 4' shown allows one or more of the two contact rods 11a and 11b, or sometimes both contact rods 11a and 11b, to always rest on the cable 6 so that the cable can be continuously sensed even when passing the support 5 along the paving section.

[0058] Figure 6 The measuring device 4” is shown, in which the contact rods 11a and 11b exist in the form of multiple rods, which can rotate about rotation axes 13a and 13b spaced apart from each other. According to Figure 6 Multiple rods are configured as rotating star-shaped components 22a and 22b. Similar to... Figures 4A to 4C The contact rods 11a and 11b shown are... Figure 6 The rotating star-shaped members 22a and 22b shown can be configured on the measuring device 4” such that at least always when the other of the rotating star-shaped members 22a and 22b is pressed into its second orientation 15a and 15b spaced apart from the cable 6 by the support 5 for tensioning the cable 6 (i.e., no longer resting on the cable 6), one of the two rotating star-shaped members 22a and 22b is positioned to rest on the first orientation 14a and 14b of the cable 6.

Claims

1. A measuring device (4, 4', 4") for a paver (1), the measuring device (4, 4', 4") comprising a height sensor (7) and a pivoting module (9), the pivoting module (9) being mounted on the height sensor (7) to pivot about a pivoting axis (8), and comprising a sensing device (10) having at least two contact rods (11a, 11b) for sensing a cable (6) tensioned along a paving section of the paver (1) as a height reference, characterized in that, The two contact rods (11a, 11b) are configured such that when the second contact rod of the two contact rods (11a, 11b) is pressed into a second orientation (15a, 15b) spaced apart from the cable (6) at least always by the support (5) for tensioning the cable (6), the first contact rod of the two contact rods (11a, 11b) is in a first orientation (14a, 14b) in which it is positioned to rest on the cable (6).

2. The measuring device of claim 1, wherein, The contact rods (11a, 11b) exist as individual contact rods, which are mounted to rotate about rotational axes (13a, 13b) spaced apart from each other.

3. The measuring device of claim 2, wherein, At least one of the contact rods (11a, 11b) exists as a single rod (12a, 12b) or as multiple rods.

4. The measuring device according to claim 2 or 3, characterized in that The contact rods (11a, 11b) are pre-tensioned to the first orientation (14a, 14b) under spring load.

5. The measuring device of claim 1, wherein, The contact rods (11a, 11b) exist in the form of a double rod, which is mounted to be able to rotate about a single axis of rotation.

6. The measuring device of claim 5, wherein, When the cable (6) is sensed, the first contact bar of the contact bars (11a, 11b) is installed in the first orientation (14a, 14b), and the second contact bar of the contact bars (11a, 11b) is installed in the second orientation (15a, 15b) and pre-tensioned under spring load.

7. The measuring device according to claim 5 or 6, characterized in that The contact rods (11a, 11b) are aligned with each other at an angle greater than 80° and less than 100°.

8. The measuring device of claim 7, wherein, The contact rods (11a, 11b) are aligned at right angles to each other.

9. The measuring device according to any of the preceding claims, characterized in that The sensing device includes at least three contact rods (11a, 11b) spaced apart from each other, wherein when sensing the cable (6), at least two of the contact rods (11a, 11b) are in the first orientation (14a, 14b), while the third contact rod is in the second orientation (15a, 15b).

10. The measuring device according to any one of the preceding claims, characterized in that, The pivoting module (9) forms a parallelogram hinge (16) for supporting the sensing device (10).

11. The measuring device of claim 10, wherein, The parallelogram hinge (16) includes a mounting rail (17) for the contact rods (11a, 11b).

12. The measuring device according to claim 10 or 11, characterized in that The parallelogram hinge (16) has a counterweight unit (18) for the sensing device (10).

13. The measuring device according to any of the preceding claims, characterized in that The contact rods (11a, 11b) form upward-sloping surfaces (25a, 25b) at their outer ends.

14. The measuring device according to any of the preceding claims, characterized in that The sensing device (10) includes at least one stop element for holding the contact rods (11a, 11b) in a predetermined orientation relative to the cable (6), and / or the contact rods (11a, 11b) can be used to sense the cable on the right and left sides of the paver (1).

15. A paver (1) having at least one measuring device (4, 4', 4") according to any one of claims 1 to 14.

16. A method for continuously sensing a cable (6) stretched along a paving section of a paving machine (1) as a height reference using a measuring device (4, 4', 4"), on which a sensing device (10) with at least two feelers (11a, 11b) for sensing the cable (6) is employed, characterized in that, The first of the two contact rods (11a, 11b) is in a first orientation (14a, 14b) resting on the cable (6), while the second of the two contact rods (11a, 11b) is pushed away from the cable (6) to a second orientation (15a, 15b) spaced apart from the cable (6) by the support (5) that tensions the cable (6).

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