EP1339920B1 - Dispositif de reglage de hauteur au laser pour un engin de chantier - Google Patents

Dispositif de reglage de hauteur au laser pour un engin de chantier Download PDF

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Publication number
EP1339920B1
EP1339920B1 EP01999705A EP01999705A EP1339920B1 EP 1339920 B1 EP1339920 B1 EP 1339920B1 EP 01999705 A EP01999705 A EP 01999705A EP 01999705 A EP01999705 A EP 01999705A EP 1339920 B1 EP1339920 B1 EP 1339920B1
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EP
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Prior art keywords
laser
measuring head
laser measuring
height
reference surface
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EP01999705A
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German (de)
English (en)
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EP1339920A1 (fr
Inventor
Willibald Sehr
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MOBA Mobile Automation GmbH
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MOBA Mobile Automation GmbH
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/004—Devices for guiding or controlling the machines along a predetermined path
    • E01C19/006—Devices for guiding or controlling the machines along a predetermined path by laser or ultrasound

Definitions

  • the present invention relates to a laser control device for a construction machine for adjusting the height of a height-adjustable machining tool.
  • a paver with a tracked running on a prepared surface on which a road surface to be produced or a road surface to be produced is applied.
  • a height-adjustable screed is provided at the front of a stockpile of the paving material is piled up, which is distributed and tracked by a conveyor, which ensures that on the front of the screed always a sufficient but not too large amount of paving material kept in stock.
  • the height of the trailing edge of the screed opposite the surface of the prepared ground which may optionally also be formed by an old pavement, defines the thickness of the finished pavement prior to its subsequent further consolidation by rolling.
  • the reference plane along which the tactile ski is guided, depends on the current machining gear. Typically, the working width of a paver is less than the width of the road surface to be manufactured. In order to determine the height level of the road surface to be produced, a tensioned steel cable is usually used as reference height for a first path of the entire road surface to be manufactured. When placing the second web, which should connect to the first web without height offset, the touch ski is guided over the just-made first web, which then forms the reference surface. So it is possible with known road pavers, by using a Tastskis different objects, such as the strained reference rope or just the fabricated track of the road surface to use as a reference plane.
  • this known type of height control of the screed has some systemic disadvantages. If, for example, a manufactured track of the road surface is used as a reference plane for guiding the tactile ski in the production of the second track and if the first track has a certain unwanted waviness, then necessarily the second track is also subject to errors, which corresponds to a picture of the Mistakes of the road surface correspond to the area scanned by the touch ski.
  • the mechanical scanning by means of a tactile ski necessarily follows a kind of envelope over the highest points of the reference surface. If, for example, an unwanted obstacle in the form of a stone lies on the reference surface, the undesired deflection of the tactile ice caused by this defect leads to a corresponding height error of the manufactured path of the road surface.
  • Another problem is the mechanical sensitivity of Tastskis justified, which can easily be damaged not only in the carelessness of the operator, but also wears quickly during normal operation.
  • the Applicant is already known a control sensor for a construction machine for generating height control signals and direction control signals by scanning a reference rope or guide rope.
  • the known control sensor has a plurality of arranged transversely to the direction of movement of the construction machine ultrasonic transceivers, which are adjacent to each other, that overlap their radiation lobes in the measurement plane in which the guide cable or reference rope.
  • the EP 0542297 B1 describes an alternative control device in which at least three ultrasonic sensors are mounted substantially in the direction of movement of the paver and spaced apart on the screed, and wherein an evaluation device uses the distance signals of the ultrasonic sensors to generate a height control signal for setting the screed.
  • this principle allows averaging of the surface in the direction of travel and leads to satisfactory results in practice. But it also has some crucial practical disadvantages. Since the sensors must be located vertically above the respective measurement points on the ground, a stable construction must be established over the track to be averaged to hold the sensors in place. Also, to provide good accuracy, the ultrasonic sensors must be as close as possible (about 30 cm) to the reference surface to be assembled. Disadvantages of this ultrasonic control device are the high design complexity, the obstruction of workers in activities at or near the construction machine and the risk of mechanical damage to the sensors and the construction supporting them in rough construction site operation.
  • the EP 0547378 B1 describes an ultrasonic control device for a mobile milling machine.
  • An evaluation device uses the signals from at least three ultrasonic sensors in order to generate control signals for the chassis height adjustment devices as a function of an adjustable nominal milling depth. This device has the same disadvantages described above in connection with the road paver.
  • the WO 99/64681 A1 describes a laser-based control device for a paver.
  • a laser scans the profile of the unprocessed surface prior to application of the paving material and the surface of the freshly applied paving material along a plane along the direction of travel of the paver and perpendicular to the road surface at a plurality of measurement points. From the profile data thus obtained, in turn, an evaluation device generates a control signal for controlling the screed of the paver.
  • a disadvantage of this system is the comparatively complex and sensitive mechanics of the laser scanner used.
  • the DE 3827617A1 describes a scanning sensor that allows a rail-like target level detection, for example, serve curbs.
  • a pre-settable distance can serve the purpose of tracing and automatically aligning the processing device in a level desired relative to the reference plane thus formed.
  • the scanning sensor may be based on the use of ultrasound, a laser beam or other optical scanning systems.
  • the object of the present invention is to provide a constructively simpler, mechanically more robust and user-friendly in construction site control device for a construction machine to adjust the height of a height-adjustable machining tool to create.
  • the present invention provides a laser control device for a construction machine for adjusting the height of a height-adjustable machining tool having a first laser measuring head, a second laser measuring head and a third laser measuring head, which are arranged on the construction machine, wherein the first laser measuring head and the second laser measuring head in a the first laser measuring head and the third laser measuring head are arranged at a second angle to each other, wherein the first angle and the second angle are selected such that a first measuring point of the first laser measuring head, a second measuring point of the second laser measuring head and a third measuring point of the third Lasermeßkopfes are spaced on a reference surface from each other, wherein the first measuring point, the second measuring point and the third measuring point are substantially in the direction of movement of the construction machine in succession.
  • the laser control device further comprises an evaluation device which, depending on output signals of the first laser measuring head, the second laser measuring head and the third laser measuring head, a first distance of the first laser measuring head relative to the reference surface, a second distance of the second laser measuring head relative to the reference surface and a third distance of the third Laser measuring head relative to the reference surface determined, calculated due to the specific distances and the known geometric arrangement of the first laser measuring head, the second laser measuring head and the third laser measuring head relative to the machining tool, the height of the machining tool relative to the reference plane and a height control signal depending on the calculated height and a desired height generated for the machining tool.
  • an evaluation device which, depending on output signals of the first laser measuring head, the second laser measuring head and the third laser measuring head, a first distance of the first laser measuring head relative to the reference surface, a second distance of the second laser measuring head relative to the reference surface and a third distance of the third Laser measuring head relative to the reference surface determined, calculated due to the specific distances and the known geometric arrangement of the first laser measuring head, the
  • An advantage of the control device is that the arrangement of the laser measuring heads and the arrangement of the measuring points on a reference surface are substantially independent of each other. Therefore, on the one hand the laser measuring heads can be mounted in a place where they do not constitute a hindrance to work or workers on or in the vicinity of the construction machine and are themselves safe from damage, eg. B. in several meters height. On the other hand, the location of the measuring points on the reference surface is largely freely adaptable to the practical requirements.
  • the use of three laser measuring heads allows the control characteristics of the laser controller to be improved by detecting, with a simple plausibility check, artifacts that may result, for example, from objects on or holes in the reference surface and not affecting the control of the tool as well as averaging a ripple of the reference surface is possibly compensated.
  • a preferred embodiment of the laser control apparatus of the present invention further includes a fourth laser gauge head and a fifth laser gauge head disposed on the construction machine at a third angle and at a fourth angle to the first laser gauge head, respectively, wherein the third angle and the fourth angle are selected in that the first measuring point, the second measuring point, the third measuring point, a fourth measuring point of the fourth laser measuring head and a fifth measuring point of the fifth laser measuring head are spaced apart on the reference surface, and in that the measuring points lie substantially one behind the other in the direction of movement of the construction machine, wherein the evaluation device the height of the machining tool further depending on a fourth distance of the fourth laser measuring head relative to the reference surface, a fifth distance of the fifth laser measuring head relative to the reference surface and the known geometric arrangement of the vie laser measuring head and calculated fifth laser measuring head relative to the machining tool.
  • the laser controller determines the differences of every two distances and classifies those distances whose difference is less than a threshold, or discards one of the determined distances as invalid and does not use it to generate the altitude control signal if the distance concerned outside a predetermined range.
  • the predetermined range may be set by a predetermined distance above / below a plane, the plane being determined by the remaining distances.
  • the evaluation device forms the average of the determined and possibly not discarded distances.
  • the laser measuring heads are further adjacent in spatial proximity to one another, substantially in the direction of movement one behind the other and substantially equidistant from the machining tool.
  • the entire laser control device can be arranged in a compact housing, so that no mechanical or electrical connection to remote sensors is required.
  • disadvantages in connection with broken or damaged signal lines are avoided, which occur in known construction machines due to the required arrangement of the ultrasonic sensors.
  • An advantage of the laser control device according to the invention is that it contains no moving or moving parts, so that it is particularly robust, low prone to failure and inexpensive in design, manufacture, installation and maintenance.
  • the particular robustness is especially under the conditions of a construction machine (vibration, a very high working temperature range, humidity, etc.) of great importance.
  • the laser control device according to the invention is z. B. attached to a paver or on a street cold mill.
  • one of the laser measuring heads is aligned with the associated measuring point and the machining tool.
  • a paver 2 is shown with a tracked chassis 4 on a prepared surface 6.
  • a height-adjustable screed 8 is arranged, which is attached by means of a pulling arm 10 to a traction point 12 on the paver 2.
  • a stock 14 of paving material which is kept constant by a corresponding, known per se regulation of the speed of a screw-like conveyor 16 substantially over the entire width range of the screed 8.
  • the screed 8 floats on the paving material of a road surface 18 to be manufactured.
  • the thickness of the to be manufactured Road surface 18 before its final consolidation by road rollers is made by a compensation of the altitude of the trailing edge 20 of the screed 8. This height control is brought about by changing the angle of attack of the screed 8, and is typically carried out by the control of adjusting cylinders, which engage at the front ends of the traction arms 10.
  • the road paver 2 comprises a laser control device according to the present invention, which is mounted in a housing 30 via a bracket 32 on the traction arm 10.
  • the laser control device comprises in the embodiment shown three, in Fig. 1 not shown laser measuring heads, the three laser beams 40, 42 and 44 directed to three measuring points 50, 52 and 54 on a reference or reference surface 60 next to, in front of and / or behind the paver.
  • the average laser measuring head is arranged vertically above the trailing edge 20 of the screed 8 so that the associated measuring point 52 lies on a straight line with the trailing edge 20 of the screed 8.
  • the first laser beam 40 and the second laser beam 42 form a first angle 70
  • the first laser beam 40 and the third laser beam 44 form a second angle 72.
  • the reference surface can, for example, by an old or an already newly manufactured path of the road surface, by an already manufactured Edge of the road or another suitable surface may be formed.
  • Fig. 2 shows a schematic plan view of the road paver 2 Fig. 1
  • the laser beams 40, 42 and 44 of the not shown LasermeßkONE in the housing 30 are directed to measuring points 50, 52 and 54, respectively.
  • the first measuring point 50 and the second measuring point 52 lie on a reference surface 60, which is on the edge of the prepared substrate 6., which is provided in the image to the right with a road surface 18 during the movement of the paver.
  • the third measuring point 54 lies on the edge of the finished road surface 18 and with the first measuring point 50 and the second measuring point 52 on a straight line.
  • the use of a plurality of laser beams 40, 42, 44 of several laser measuring heads makes possible a flexible arrangement of the measuring points 50, 52, 54 adapted to the conditions and requirements of the respective field of use.
  • Fig. 3 an embodiment of the laser control device is shown, which, unlike the in Fig. 1 shown embodiment, five laser measuring heads 80, 82, 84, 86, 88, each having a functionally associated lens 90, 92, 94, 96 and 98, respectively.
  • the laser measuring heads 80, 82, 84, 86, 88 emit laser beams 40, 42, 44, 106, 107 which are directed to measuring points 50, 52, 54, 56, 108, 109.
  • the laser control device further comprises a number of the laser measuring heads 80, 82, 84, 86, 88 corresponding number of transceiver circuits 110, 112, 114, 116, 118.
  • transceiver circuits 110, 112, 114, 116, 118 are each electrically connected to one of the laser measuring heads 80, 82, 84, 86, 88.
  • the transmit-receive circuits 110, 112, 114, 116, 118 are further electrically signal-connected to an evaluation device 120, which may comprise, for example, a microcomputer.
  • an evaluation device 120 which may comprise, for example, a microcomputer.
  • each of the transceiver circuits is connected via two signal lines to the evaluation device, wherein signals are sent to the transceiver circuit via a line and signals are received from the transceiver circuit via the other line, as in Fig. 3 is shown by the arrows associated with the lines.
  • the evaluation device 120 is connected via an interface 122 and a first terminal 124 with a device, not shown, for driving the above-mentioned actuating cylinder which engage the front ends of the traction arms 10 to the altitude of the trailing edge 20 of the screed 8 and thus the thickness of to influence producing road surface 18.
  • the connection between the evaluation device 120 and the interface 122 is in Fig. 3 schematically shown by the arrow 125.
  • the evaluation device 120 is connected via a second terminal 126 to a device, not shown, on which a user can set a desired value for the height adjustment of the screed.
  • the members of the laser control device are powered by a power source, not shown, with electrical power.
  • Each laser measuring head 80, 82, 84, 86 and 88, respectively, may be integrated with the respective associated transmit-receive circuit 110, 112, 114, 116 and 118 in one device (as shown) and / or with the respective associated lens 90 , 92, 94, 96 and 98, respectively.
  • the transmit-receive circuit 110, 112, 114, 116 and 118, the laser gauge head 80, 82, 84, 86 and 88 and the lens 90, 92, 94, 96 and 98 act together on the transit time of the laser beam 40, 42, 44, 106 and 107 from the time of its emission by the laser measuring head 80, 82, 84, 86 and 88, respectively, to the time of receiving the reference surface 60 at the measuring point 50 , 52, 54, 108 and 109 reflected laser light by the laser measuring head 80, 82, 84, 86 and 88, respectively, the distance of the laser measuring head 80, 82, 84, 86 and 88 from the respective measuring point 50, 52, 54, 108 and 109 on the reference surface 60 and to send an electrical signal corresponding to this distance to the evaluation device 120.
  • the evaluation device 120 calculates its distance from the reference surface 60 from the thus determined distance of the laser measuring head 80, 82, 84, 86 or 88 and from its known geometric arrangement.
  • the laser height control device can have further, not shown interfaces for exchanging data with other devices, For example, have other control devices of the construction machine 2, with a central computer of the construction machine 2 or with an external computer for performing a fault diagnosis.
  • the laser measuring heads 80, 82, 84, 86, 88 or the laser beams 40, 42, 44, 106, 107 emanating from them are spatially aligned in this way in that the measuring points 50, 52, 54, 108, 109 are spaced as far as possible from each other, d. h., That z. B. the first angle 70 between the first laser beam 40 and the second laser beam 42 and the second angle 72 between the first laser beam 40 and the third laser beam 44 are selected to be as large as possible.
  • the evaluation device 120 determines from the distances of the laser measuring heads 80, 82, 84, 86, 88 relative to the reference surface 60 and the known geometric arrangement of the laser measuring heads 80, 82, 84, 86, 88 with respect to the plank 8, the height of the plank 8 relative to the reference surface 60. From this height of the screed 8 with respect to the reference surface 60 and from a desired height, which is adjustable at the above-mentioned, not shown, with the evaluation device 120 via the terminal 126 device, the evaluation device 120 determines a height control signal for the screed. 8 This height control signal is used on the paver 2 for driving the actuating cylinder for adjusting the front draw points 12 of the traction arms 10 of the screed. 8
  • the evaluation device 120 may be configured such that the evaluation device 120 rejects a distance of a laser measuring head 80, 82, 84, 86, 88 from the reference surface 60 as invalid and does not use it to generate the height control signal if the distance concerned is outside a predetermined range lies. This makes it possible, for example, to suppress the unwanted transmission of various errors of the reference surface 60 on the road surface 18 to be manufactured.
  • the predetermined range may be defined by a lower limit and an upper limit of the distance of a laser measuring head 80, 82, 84, 86, 88 from the reference surface 60.
  • the errors of the reference surface 60 are, for example, holes, stones or other objects lying on the reference surface 60, and their influence on the height regulation of the screed 8 is attenuated by the above-described averaging, but is not eliminated.
  • the upper limit and the lower limit are selected so that a ripple of the reference surface 60 is still within the range defined by the upper limit and the lower limit so as not to discard too many measurement points 50, 52, 54, 108, 109 as invalid , And that most objects and holes on or in the reference surface 60 or the distances generated by these errors are outside the range, so as to have no influence on the height control of the plank 8.
  • the exact values of the two limit values are determined by the respective conditions, for example the quality of the Reference surface 60 or a longitudinal curvature of the reference surface 60 and the road surface 18 to be manufactured as well as the spatial arrangement of the measuring points 50, 52, 54, 108, 109 dependent and can also be adapted manually or automatically to the particular circumstances during use.
  • the range just described, outside of which one of the predetermined distances is discarded and not used to generate the height control signal, may, in a laser height control device having at least three laser measuring heads 80, 82, 84, 86, 88, by an area above / below the plane, be defined by the remaining distances defined.
  • the difference between every two distances is determined and those distances are rejected as invalid and not used to generate the height control signal whose differences to the distances of the other laser measuring heads 80, 82, 84, 86, 88 over the reference surface 60 exceed a predetermined limit. Again, errors on the reference surface 60 are identified and their influence on the height control signal eliminated.
  • the advantage of the laser measuring heads 80, 82, 84, 86, 88 over conventional approaches using ultrasonic measuring heads is that, unlike ultrasonic measuring heads, no perpendicular irradiation to the reference surface 60 and no small distance to it is required.
  • the laser measuring heads 80, 82, 84, 86, 88 can be used under normal circumstances, ie with not too much reflecting reference surface 60, even at high angles to the surface solder and with a large distance from the reference surface 60. Thereby It is possible, all laser measuring heads 80, 82, 84, 86, 88 largely independent of the arrangement of the associated measuring points 50, 52, 54, 108, 109 to be arranged on the reference surface 60.
  • all laser measuring heads 80, 82, 84, 86, 88 together with the evaluation device 120 and the interface 122 as in Fig. 3 can be arranged in a common housing 30 which is mounted on the paver 2 at a height opposite the road, which corresponds substantially to the height of the paver 2.
  • the mechanical and design effort for the attachment of the control device is reduced considerably.
  • the risk of damage to the control device in rough construction site operation and the risk of obstruction of site workers fall during their activities on the paver 2 and in its immediate vicinity.
  • the laser measuring heads 80, 82, 84, 86, 88 which may be adjustable in their spatial orientation but are stationary during operation, avoid the disadvantages of a laser scanner which can be moved in operation and which has a sensitive mechanism.
  • the paver 2 mentioned in the preceding embodiments is only one example of a construction machine on which the laser control device can be used to control a height-adjustable machining tool in height so that the machined surface has a desired profile.
  • Another example is the in Fig. 4 illustrated road cold milling machine 200 with a front chassis 202 and a rear chassis 204, of which at least one is height adjustable.
  • the machining tool in this case is a milling drum 206 whose height is opposite an unprocessed roadway 208 and a processed roadway 210 and thus the "milling depth" is adjusted by the height-adjustable chassis 202 or 204 or optionally at least one of the height-adjustable trolleys 202, 204 is adjusted in height.
  • the bracket 32 is on the basis of Fig. 1 described laser control device mounted in the housing 30.
  • one of the laser measuring heads is aligned with the associated measuring point and the axis of the milling drum (206).
  • the height control signal generated by the laser control device controls the height adjustment of the chassis 202, 204 in this case.
  • the use of the laser control device according to the present invention is possible on any construction machine that changes the profile of a surface, i. H. Ablates or applies layers to obtain a desired profile and thereby refer to a reference surface. This may under certain circumstances be a bulldozer, a so-called motor grader, etc.

Claims (12)

  1. Dispositif de réglage au laser pour un engin de chantier (2; 200) pour le réglage de la hauteur d'un outil de traitement réglable en hauteur (8; 206), avec
    une première tête de mesure au laser (80), une deuxième tête de mesure au laser (82) et une troisième tête de mesure au laser (84) disposées sur l'engin de chantier (2; 200), la première tête de mesure au laser (80) et la deuxième tête de mesure au laser (82) étant disposées suivant un premier angle (70) entre elles, la première tête de mesure au laser (80) et la troisième tête de mesure au laser (84) étant disposées suivant un deuxième angle (72) entre elles, le premier angle (70) et le deuxième angle (72) étant choisis de sorte qu'un premier point de mesure (50) de la première tête de mesure au laser (80), un deuxième point de mesure (52) de la deuxième tête de mesure au laser (82) et un troisième point de mesure (54) de la troisième tête de mesure au laser (84) soient distants l'un de l'autre sur une surface de référence (60), le premier point de mesure (50), le deuxième point de mesure (52) et le troisième point de mesure (54) se situant sensiblement l'un derrière l'autre dans le sens de déplacement de l'engin de chantier (2; 200); et
    un moyen d'évaluation (120) qui détermine, en fonction de signaux de sortie de la première tête de mesure au laser (80), de la deuxième tête de mesure au laser (82) et de la troisième tête de mesure au laser (84), une première distance de la première tête de mesure au laser (80) par rapport à la surface de référence (60), une deuxième distance de la deuxième tête de mesure au laser (82) par rapport à la surface de référence (60) et une troisième distance de la troisième tête de mesure au laser (84) par rapport à la surface de référence (60), calcule, sur base des distances déterminées et de la disposition géométrique connue de la première tête de mesure au laser (80), de la deuxième tête de mesure au laser (82) et de la troisième tête de mesure au laser (84) par rapport à l'outil de traitement (8; 206), la hauteur de l'outil de traitement par rapport au plan de référence (60) et génère, en fonction de la hauteur calculée et d'une hauteur de consigne, un signal de réglage de hauteur pour l'outil de traitement (8; 206).
  2. Dispositif de réglage au laser selon la revendication 1, comprenant une quatrième tête de mesure au laser (86) et une cinquième tête de mesure au laser (88), la quatrième tête de mesure au laser (86) étant disposée sur l'engin de chantier (2; 200) suivant un troisième angle par rapport à la première tête de mesure au laser (80), la cinquième tête de mesure au laser (88) étant disposée sur l'engin de chantier (2; 200) suivant un quatrième angle par rapport à la première tête de mesure au laser (80), le troisième angle et le quatrième angle étant choisis de sorte que le premier point de mesure (50), le deuxième point de mesure (52), le troisième point de mesure (54), un quatrième point de mesure (108) de la quatrième tête de mesure au laser (86) et un cinquième point de mesure (109) de la cinquième tête de mesure au laser (88) soient distants l'un de l'autre sur la surface de référence (60) et que le premier (50), le deuxième (52), le troisième (54), le quatrième (108) et le cinquième point de mesure (109) se situent sensiblement l'un derrière l'autre dans le sens de déplacement de l'engin de chantier (2; 200), le moyen d'évaluation (120) calculant la hauteur de l'outil de traitement (8; 206) par ailleurs en fonction d'une quatrième distance de la quatrième tête de mesure au laser (86) par rapport à la surface de référence (60), d'une cinquième distance de la cinquième tête de mesure au laser (88) et de la disposition géométrique connue de la quatrième tête de mesure au laser (86) et de la cinquième tête de mesure au laser (84) par rapport à l'outil de traitement (8; 206).
  3. Dispositif de réglage au laser selon la revendication 2, dans lequel le moyen d'évaluation (120) détermine les différences de chaque fois deux distances, et classifie comme valides les distances dont les quantités de différence sont inférieures à une valeur limite.
  4. Dispositif de réglage au laser selon la revendication 1 ou 2, dans lequel le moyen d'évaluation (120) rejette l'une des distances déterminées comme étant non valide et ne l'utilise pas pour la génération du signal de réglage de hauteur lorsque la distance concernée se situe en dehors d'une plage fixée au préalable.
  5. Dispositif de réglage au laser selon la revendication 4, dans lequel la plage fixée au préalable est fixée par une distance prédéterminée au-dessus / au-dessous d'un plan, le plan étant fixé par les distances restantes.
  6. Dispositif de réglage au laser selon l'une des revendications 1 à 5,
    dans lequel le moyen d'évaluation (120) établit la moyenne des distances déterminées.
  7. Dispositif de réglage au laser selon l'une des revendications 1 à 6,
    dans lequel les têtes de mesure au laser (80, 82, 84, 86, 88) sont disposées adjacentes à proximité spatiale l'une de l'autre, sensiblement l'une derrière l'autre dans le sens de déplacement et sensiblement à des distances identiques par rapport à l'outil de traitement (8; 206).
  8. Dispositif de réglage au laser selon l'une des revendications précédentes, dans lequel l'une des têtes de mesure au laser (80, 82, 84, 86, 88) est alignée sur le point de mesure (50, 52, 54, 108, 109) associé et l'outil de traitement (8; 206).
  9. Dispositif de réglage au laser selon l'une des revendications 1 à 7,
    dans lequel l'engin de chantier est un finisseur routier (2) et l'outil de traitement est une poutre (8) qui est reliée par l'intermédiaire d'un bras de traction (10) au finisseur routier (2), les têtes de mesure au laser (80, 82, 84, 86, 88) étant fixées dans un boîtier commun (30), par l'intermédiaire d'un support (32), au bras de traction (10), le signal de réglage de hauteur généré par le moyen d'évaluation (120) provoquant un réglage d'un point de traction (12) du bras de traction (10) de la poutre (8).
  10. Dispositif de réglage au laser selon l'une des revendications 1 à 7,
    dans lequel l'engin de chantier est une fraise routière à froid (200) avec un train de roues avant (202) et un train de roues arrière (204), dont au moins l'un est réglable en hauteur, et dans lequel l'outil de traitement est une fraise (206), les têtes de mesure au laser (80, 82, 84, 86, 88) étant fixées dans un boîtier commun (30), par l'intermédiaire d'un support (104), à la fraise routière à froid (200), le signal de réglage en hauteur généré par le moyen d'évaluation (120) provoquant un réglage en hauteur du train de roues avant (202) et/ou arrière (204).
  11. Dispositif de réglage au laser selon la revendication 9, dans lequel l'une des têtes de mesure au laser (80, 82, 84, 86, 88) est alignée sur le point de mesure (50, 52, 54, 108, 109) associé et le bord arrière (20) de la poutre (8).
  12. Dispositif de réglage au laser selon la revendication 10, dans lequel l'une des têtes de mesure au laser (80, 82, 84, 86, 88) est alignée sur le point de mesure (50, 52, 54, 108, 109) associé et l'axe du tambour de fraise (206).
EP01999705A 2000-12-07 2001-11-28 Dispositif de reglage de hauteur au laser pour un engin de chantier Expired - Lifetime EP1339920B1 (fr)

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DE10060903 2000-12-07
DE10060903A DE10060903C2 (de) 2000-12-07 2000-12-07 Laser-Höhenregeleinrichtung für eine Baumaschine
PCT/EP2001/013912 WO2002046533A1 (fr) 2000-12-07 2001-11-28 Dispositif de reglage de hauteur au laser pour un engin de chantier

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DE10060903C2 (de) 2002-10-31
ES2317958T3 (es) 2009-05-01
WO2002046533A1 (fr) 2002-06-13
US20040068896A1 (en) 2004-04-15
DE50114533D1 (de) 2009-01-08
US6916070B2 (en) 2005-07-12
DE10060903A1 (de) 2002-07-11
EP1339920A1 (fr) 2003-09-03

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