EP4265845A1 - Dameuse pour la conception et l'entretien de terrain enneigés - Google Patents
Dameuse pour la conception et l'entretien de terrain enneigés Download PDFInfo
- Publication number
- EP4265845A1 EP4265845A1 EP23167433.4A EP23167433A EP4265845A1 EP 4265845 A1 EP4265845 A1 EP 4265845A1 EP 23167433 A EP23167433 A EP 23167433A EP 4265845 A1 EP4265845 A1 EP 4265845A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- snow
- drive
- snow groomer
- borne
- groomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H4/00—Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow
- E01H4/02—Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow for sporting purposes, e.g. preparation of ski trails; Construction of artificial surfacings for snow or ice sports ; Trails specially adapted for on-the-snow vehicles, e.g. devices adapted for ski-trails
Definitions
- the invention relates to a snow groomer for the design and maintenance of snow terrain with a chassis frame and with a tracked chassis, which has two drive sides on opposite longitudinal sides of the chassis frame, each drive side having a Turas wheel, several wheels, as well as a tension wheel and a wheel around the Turas wheel, the wheels and the tensioning wheel has a running chain, as well as with a travel drive system for driving the chain drive, and with a front or rear attachment.
- Such a snow groomer is known.
- the well-known snow groomer has a chassis frame on which a driver's cab is positioned.
- a chain drive is provided with two drive sides, each of which is assigned a drive chain.
- the track drive is driven by a traction drive system.
- a rear cutter is arranged at the rear of the snow groomer and is intended for processing a snow surface.
- a sensor is provided on the rear cutter, which is continuously immersed in a layer of snow on the snow surface when the snow groomer is in operation.
- the sensor is equipped with a force sensor and a temperature sensor in order to be able to detect snow surface structure.
- the object of the invention is to create a snow groomer of the type mentioned at the outset, which enables good processing quality of a snow surface on the snowy terrain.
- a sensor system for detecting structure-borne and/or airborne sound frequencies is arranged in the area of the chassis frame and/or on the attachment, which is connected to an electronic monitoring device in which target values for structure-borne or airborne sound frequency ranges of Functional parts are stored in the intended operation of the snow groomer, and compares the recorded actual values of structure-borne or airborne sound frequencies with the target values and, depending on the result of the comparison, outputs a signal.
- the sensor system according to the invention for detecting structure-borne sound frequencies and/or airborne sound frequencies makes it possible to detect the snow surface without - as in the prior art - a measuring sensor being immersed in the snow surface, which can cause damage to the snow surface.
- structure-borne sound waves and/or airborne sound waves are detected, which arise during driving due to the inevitable immersion of chain stays of the drive chains in the snow surface. These sound waves are evaluated and signaled. This allows conclusions to be drawn about snow conditions on the snow surface, without having to damage the snow surface.
- the detection takes place without contact.
- the functional parts themselves can be checked for proper operation, since damaged functional parts emit different sound frequencies than undamaged functional parts.
- it is additionally or alternatively provided to provide a corresponding sensor system on a front or rear attachment of the snow groomer in order, on the one hand, to be able to monitor corresponding functional parts of this attachment for proper functioning and, on the other hand, to monitor corresponding functional parameters of the attachment based on the recorded snow and layer build-up conditions to be able to adapt.
- the attachment preferably has at least one milling shaft that rotates during operation.
- the monitoring device is coupled to the travel drive system to obtain driving speed or chain speed data, and several characteristic curves of structure-borne or airborne sound frequency ranges for different driving or chain speeds of the snow groomer are stored in the monitoring device.
- This embodiment takes into account the fact that structure-borne or airborne sound frequencies are different at different speeds of the snow groomer and also depending on slip of the track drive when the snow groomer is driving.
- body and/or airborne sound frequency ranges for different surface or structure designs of the snowy terrain are stored in the monitoring device when the tracked running gear of the snow groomer drives over it. If the attachment is designed as a rear tiller, alternatively or additionally, body and/or airborne sound frequency ranges for different surface or structure designs of the snow terrain can be stored during the milling operation of the rear tiller, which serve as target values for a comparison with the actually recorded actual values.
- the attachment is designed as a rear tiller, and structure-borne noise frequency ranges are stored in the monitoring device for the intended operation of at least one milling shaft of the rear tiller and/or a smoothing device of the rear tiller.
- the sensor system has at least one triaxial acceleration sensor for recording structure-borne sound frequencies.
- the triaxiality allows three-dimensional detection of structure-borne sound waves.
- the acceleration sensor can be piezoelectric or based on quartz technology. Alternatively, the acceleration sensor can be designed to be capacitive or magnetically stabilized. Quartz technology uses acceleration measuring systems with flexible quartz rods. Alternatively, it is possible to provide an acceleration sensor with magnetically stabilized masses, the deflection of which results in corresponding magnetic field changes that are detected.
- Piezoelectric acceleration sensors use piezoceramic sensor plates that convert dynamic pressure fluctuations into electrical signals that are further processed accordingly. The pressure fluctuation is generated by a mass attached to the piezoceramic.
- the acceleration sensor is miniaturized, in particular as a micro-electro-mechanical system (MEMS).
- MEMS acceleration sensors work with changes in electrical capacity.
- Such sensors are usually made of silicon.
- the acceleration sensor is attached to a tensioning axle or a tensioning axle support of the tensioning wheel.
- the tension wheel is provided on each drive side of the snow groomer as the front wheel around which the respective drive chain runs. It has been found that when an acceleration sensor is arranged on the tensioning axle or a support of the tensioning axle, corresponding structure-borne sound frequencies of functional parts of the snow groomer can be detected particularly well when the snow groomer is driving.
- parts or sections of the drive sides of the track drive, parts of the travel drive system, parts of the attachment or bearing or pump components in the area of the chassis frame are provided as functional parts.
- Corresponding functional parts are all parts or sections that can be rotated or moved in some other way when the snow groomer is driving or working.
- At least one acceleration sensor for detecting structure-borne noise frequencies is on a support frame of the front or rear Attachment attached.
- the acceleration sensor is preferably attached to a support frame of a rear cutter of the snow groomer. This configuration enables functional components of the rear tiller to be controlled depending on evaluations of the snow terrain structure based on the detected structure-borne noise frequencies.
- the monitoring device is connected to a control device for controlling a milling drive of the milling shaft and for controlling an immersion depth of the milling shaft and for controlling a contact pressure of the smoothing device on the snow surface.
- a snow groomer 1 after the Fig. 1 and 2 is provided with a front attachment in the form of a clearing blade 2 and with a rear attachment in the form of a rear milling machine 3.
- the snow groomer 1 has a chassis frame 4, which carries a driver's cab 6 and a winch arrangement 5.
- the chassis frame 4 is flanked on opposite long sides by a chain drive, which has a left and a right drive side - seen in the normal direction of travel of the snow groomer 1.
- Each side of the drive is provided with a rear wheel 9, a front tension wheel 7 and a total of four wheels 8, around which a drive chain 10 runs.
- the drive chain 10 is made up of a plurality of chain webs 11 extending in the transverse direction of the vehicle and several chain belts running in the longitudinal direction of the vehicle, to which the chain webs 11 are attached.
- the drive chain 10 is guided using track brackets, which are each arranged on the inside of the chain webs 11 and are firmly connected to the chain webs 11 and the chain belts.
- the track drive is driven by a travel drive system that uses suitable drive motors to drive the two Turas wheels 9 on the opposite sides of the drive for forward travel, reverse travel and steering movements of the snow groomer 1.
- Fig. 1 It can be seen that the snow groomer 1 in the operational state with the chain webs 11 of a lower run of the drive chain 10 is immersed in a snow surface S of a snowy terrain up to approximately a snow layer Si shown schematically.
- the height of the snow build-up between the snow surface S and the snow layer S 1 processed by the chain webs 11 is the processing depth of the drive chains 10 when the snow groomer 1 drives over the snow surface, ie the snow terrain. This is caused by the immersion of the chain webs 11 when the drive chains 10 are rotating
- noises in the form of airborne sound waves which depend on the layer structure of the snow terrain starting from the snow surface S.
- structure-borne sound waves arise due to the large number of moving functional parts of the snow groomer 1 when driving.
- Such functional parts are in particular the drive chains 10, the running wheels 8, the tensioning wheels 7 and the Turas wheels 9 as well as corresponding axle bearings and axle suspensions of the wheel bearings or hydraulic pumps for a working hydraulics or for the travel drive system of the snow groomer 1, to name just a few.
- These air and structure-borne sound waves are generated in the snow groomer 1 in accordance with Fig. 1 and 2 detected by at least one acceleration sensor 12, which is based on the Fig. 2 is recognizable.
- the acceleration sensor 12 is designed as a micro-electro-mechanical system and can record triaxial accelerations caused by corresponding structure-borne sound waves.
- the acceleration sensor 12 is attached to a tensioning axle support of a tensioning axle 14, which carries the left tensioning wheel 7 - viewed in the normal direction of travel.
- the acceleration sensor 12 is connected to an electronic monitoring device Ü, in which target value ranges for structure-borne or airborne sound frequency ranges of different functional parts of the snow groomer are stored, which arise when the snow groomer is operated as intended. Several characteristic curves of target value ranges can be stored, which represent different snow conditions, different layer structures of the snow terrain and/or different driving or chain speeds of the snow groomer 1.
- the monitoring device Ü the recorded actual values of structure-borne or airborne sound frequencies of the acceleration sensor 12 are compared with the target value ranges and evaluated.
- a signal line Bi is provided to transmit the actual values of the acceleration sensor 12 to the monitoring device Ü.
- the monitoring device Ü outputs a signal which is sent in the form of data information to an electronic control unit St of the traction drive system or to other controls of functional parts of the snow groomer 1 can be forwarded.
- a corresponding data signal can also be sent to a display device D in the driver's cab 6 of the snow groomer 1, so that a driver of the snow groomer 1 receives information about the condition of the slope of the snowy terrain or information in the form of an error message about possibly damaged functional parts of the snow groomer 1 receives.
- the driver adapts the driving function of the traction drive system accordingly depending on the information transmitted, or that the control unit St of the traction drive system directly and automatically makes corresponding changes to the traction drive in order to guide the traction drive back towards intended operation.
- the drive drive can be reduced in order to reduce the slip.
- the control variable is the comparison between target and actual values of structure-borne sound frequencies or airborne sound frequencies.
- the acceleration sensor 12 can also be provided to record structure-borne sound frequencies of the front clearing blade 2 or the rear tiller 3 and to adapt a corresponding control of the clearing blade 2 or the rear tiller 3 depending on the comparison between corresponding target and actual values of structure-borne sound frequencies.
- the rear tiller 3 is additionally provided with a further acceleration sensor 13, which is coupled to the monitoring device Ü via a signal line B 2 .
- the acceleration sensor 13 is designed in the same way as the acceleration sensor 12, namely as a MEMS acceleration sensor with triaxial detection capability.
- the acceleration sensor 13 is attached to a support frame of the rear tiller 3.
- the acceleration sensor 13 particularly records structure-borne sound frequencies of at least one driven milling shaft of the rear-mounted tiller 3, but also structure-borne sound frequencies that arise from the pressing of a rear-side smoothing device of the rear-mounted tiller 3 onto the snow surface.
- the monitoring device Ü is in the illustrated embodiment according to Fig. 1 and 2 additionally also connected to a rear milling machine control HF, which on the one hand controls a milling shaft drive and, on the other hand, a corresponding hydraulic actuator, which controls the immersion depth of the at least one milling shaft in the snow surface and the orientation of the smoothing device relative to the snow ground as well as the contact pressure of the smoothing device on the snow ground .
- a rear milling machine control HF which on the one hand controls a milling shaft drive and, on the other hand, a corresponding hydraulic actuator, which controls the immersion depth of the at least one milling shaft in the snow surface and the orientation of the smoothing device relative to the snow ground as well as the contact pressure of the smoothing device on the snow ground .
- target value ranges for structure-borne sound frequencies of the corresponding functional parts of the rear tiller 3 are stored in the monitoring device Ü, preferably with different characteristics that include different driving speeds and/or different snow conditions or layer structures of the snow substrate.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022203857.6A DE102022203857A1 (de) | 2022-04-20 | 2022-04-20 | Pistenraupe zur Gestaltung und Pflege von Schneegelände |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4265845A1 true EP4265845A1 (fr) | 2023-10-25 |
| EP4265845B1 EP4265845B1 (fr) | 2025-06-04 |
Family
ID=86006713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23167433.4A Active EP4265845B1 (fr) | 2022-04-20 | 2023-04-11 | Dameuse pour la conception et l'entretien de terrain enneigés |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4265845B1 (fr) |
| DE (1) | DE102022203857A1 (fr) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4109257C1 (fr) * | 1991-03-21 | 1992-10-22 | Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De | |
| JP2011011622A (ja) * | 2009-07-01 | 2011-01-20 | Bridgestone Corp | 履帯装着車両監視装置 |
| DE102017002163A1 (de) * | 2017-03-09 | 2018-09-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Kettenspannsystem für Kettenfahrzeuge |
| DE102018213240A1 (de) * | 2018-08-07 | 2020-02-13 | Kässbohrer Geländefahrzeug AG | Pistenraupe mit einem Kettenlaufwerk |
| US20210173399A1 (en) * | 2017-12-08 | 2021-06-10 | Camso Inc. | Systems and methods for monitoring off-road vehicles |
| DE102020206710A1 (de) | 2020-05-28 | 2021-12-02 | Kässbohrer Geländefahrzeug Aktiengesellschaft | Pistenraupe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021211674A1 (de) * | 2021-10-15 | 2023-04-20 | Kässbohrer Geländefahrzeug Aktiengesellschaft | Computergestütztes Verfahren zur Pflege einer Schneepiste sowie computergestütztes System zur Durchführung des Verfahrens |
-
2022
- 2022-04-20 DE DE102022203857.6A patent/DE102022203857A1/de active Pending
-
2023
- 2023-04-11 EP EP23167433.4A patent/EP4265845B1/fr active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4109257C1 (fr) * | 1991-03-21 | 1992-10-22 | Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De | |
| JP2011011622A (ja) * | 2009-07-01 | 2011-01-20 | Bridgestone Corp | 履帯装着車両監視装置 |
| DE102017002163A1 (de) * | 2017-03-09 | 2018-09-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Kettenspannsystem für Kettenfahrzeuge |
| US20210173399A1 (en) * | 2017-12-08 | 2021-06-10 | Camso Inc. | Systems and methods for monitoring off-road vehicles |
| DE102018213240A1 (de) * | 2018-08-07 | 2020-02-13 | Kässbohrer Geländefahrzeug AG | Pistenraupe mit einem Kettenlaufwerk |
| DE102020206710A1 (de) | 2020-05-28 | 2021-12-02 | Kässbohrer Geländefahrzeug Aktiengesellschaft | Pistenraupe |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4265845B1 (fr) | 2025-06-04 |
| DE102022203857A1 (de) | 2023-10-26 |
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Effective date: 20260305 |