WO2015034497A1 - Système de pesage pour une fraiseuse routière - Google Patents

Système de pesage pour une fraiseuse routière Download PDF

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Publication number
WO2015034497A1
WO2015034497A1 PCT/US2013/058202 US2013058202W WO2015034497A1 WO 2015034497 A1 WO2015034497 A1 WO 2015034497A1 US 2013058202 W US2013058202 W US 2013058202W WO 2015034497 A1 WO2015034497 A1 WO 2015034497A1
Authority
WO
WIPO (PCT)
Prior art keywords
milling machine
volume
weight
road
milled
Prior art date
Application number
PCT/US2013/058202
Other languages
English (en)
Inventor
Brian Rudge
Original Assignee
Volvo Construction Equipment Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volvo Construction Equipment Ab filed Critical Volvo Construction Equipment Ab
Priority to PCT/US2013/058202 priority Critical patent/WO2015034497A1/fr
Publication of WO2015034497A1 publication Critical patent/WO2015034497A1/fr

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Classifications

    • 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
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums

Definitions

  • the present invention relates to a road milling machine, in particular, providing a convenient and inexpensive method for weighing truck load limit and a road milling machine having devices for providing such weighing and warning to a user.
  • a road milling machine is configured for use in degrading formations.
  • the road milling machine comprises a rotary degradation drum disposed on the underside of the machine and arranged transverse to the working direction.
  • the rotary degradation drum comprises a plurality of picks.
  • Such road milling machines traverse over ground, with the milling rotor submerging into the ground and milling off the soil material with the help of the milling picks arranged on the rotating milling rotor.
  • the road milling machine thus moves in the working direction and traverses over the soil to be processed.
  • Such road milling machines are also preferably designed as self-propelled machines, thus eliminating the need for separate transporting vehicles.
  • the road milling machines An important aspect in the operation of such road milling machines is the handling of the milled material, i.e. the material milled by the cutting drum. In many areas of application, it is necessary that the milled material is transported away from the milling location by means of a suitable transporting device, for example, a truck. To this end, the road milling machines usually has a conveyor by means of which the milled material can be transported during the milling operation of the road milling machine from the area of the milling rotor to the transporting container of the transporting vehicle.
  • a conveyor belt directed to the front has particularly proven suitable for milling devices designed as road milling machines.
  • Front-loader has the advantage that during milling operation the transporting vehicle may drive in front of the milling device on the ground still to be milled.
  • front-loader normally places heavy requirements on the milling machine operator. For example, the visibility of the preceding transporting vehicle is poor and the milling machine operator cannot see the loading trough in full. The driver of the transporting vehicle cannot see the loading conveyor as well.
  • Prior art shows that a measuring method with human senses to measure weight or volume of vehicle load material reaches a height that is visible and relying on the machine and the transporting vehicle operators' experience to approximate when the weight limit is reached.
  • this measurement is not accurate according to types of materials. Also, relying too much on an operator, who might not have that much experience, may interrupt operators' safe operation.
  • Prior art shows another method to measure the transporting vehicle load.
  • the weight of a truck fill materials can be measured by a conveyor belt scales purchased as part of a third party troughing roller assembly.
  • a conveyor belt scales purchased as part of a third party troughing roller assembly.
  • the conveyor with scale is not initially attached to the road milling machine, it is hard to be adopted later on.
  • prior art provides a method using a secondary conveyor belt lift cylinder pressure to determine the load being conveyed.
  • the conveyor drive motor speed sensor is additionally used along with weight and a material density table to calculate material volume.
  • This prior art has to be equipped with a secondary conveyor belt lift cylinder pressure sensor but the present invention does not require additional sensors except that are already used in conventional road milling machines. Disclosure
  • the present invention employs the following arrangement.
  • a method of controlling volume or weight of material loaded into a transporting container from a road milling machine comprising the steps of:
  • the method further comprising the step of:
  • step c) displaying loaded material volume and/or material weight of step c) at display panel. It is also preferable that in step c), the following steps occur:
  • the alarm system provides visual alarm and/or audible alarm.
  • a method of controlling volume or weight of material loaded into a transporting container from a road milling machine comprising the steps of:
  • a method further comprising the step of:
  • step c displaying loaded material volume and/or material weight of step c).
  • a conveyor through which the milled material is transported to a transporting container; a microprocessor that controls calculation of weight or volume of the milled material and determines when to activate alarm unit; and
  • said sensor devices includes a drive motor speed sensor that can detect speed of said conveyor drive speed and a material height sensor that can be attached at laminar portion of said conveyor top to detect material height of the milled material.
  • a road milling machine with transporting vehicle load limit detecting unit includes cutting depth detecting sensor device which determines the depth by tracking the difference of position of the lift cylinders where front wheel side lift cylinder located on the precut road surface and rear wheel side lift cylinder located on the milled road surface.
  • a road milling machine with a transporting vehicle load detecting device comprising:
  • a conveyor through which the milled material is transported to a transporting container; a microprocessor that controls calculation of weight or volume of the milled material and determines when to activate alarm unit;
  • sensor devices detecting drive motor speed, and cutting depth of the road.
  • the cutting depth can be determined by tracking position difference of front wheel side lift cylinder and rear wheel side lift cylinder where the front wheel side lift cylinder located on the precut road and the rear wheel side lift cylinder located on the milled road.
  • the present invention provides a method for measuring weight of truck load materials with conveyor drive motor speed sensor currently attached to a road milling machine, with conveyor cross sectional area and a material density table.
  • the present invention provides easy and affordable transporting vehicle load calculation without additional devices on the machine. It is easy to adopt, cost-efficient, and useful for providing relatively accurate weight measurement for a road milling machine.
  • the present invention also can provide warning signs to a user when the material load is close to preset percentage of the truck load limit so that a user can stop or slow down the operation.
  • Fig. 2 shows a flow chart for calculating weight by using conveyor cross- sectional area.
  • Fig. 3 shows a cross sectional view of the conveyor belt of the road milling machine measurements thereof would be used to calculate cross sectional area of loaded materials on the conveyor belt using the material height.
  • Fig.4 shows a simplified cross sectional view of the conveyor belt of the road milling machine.
  • Fig. 5 shows a flow chart for calculating weight by using cutting depth of the milling machine.
  • the road milling machine comprises a main body 1, a conveyor 2 connected to front part of the main body 1.
  • the main body contains mechanical components of the machine.
  • the main body 1 further comprises two rotating wheels 4, 5 under the machine part of the main body 1.
  • Rotary cutting drum 3 with a plurality of picks is located between two rotating wheels 4,5 of the machine. An operator would sit on the operation seat 6 and will get the required information from the control panel 7.
  • Prior art conveyor using conveyor roller weight sensor would have sensors on laminar portion of the conveyor. However, there are only limited numbers of points where the roller weight sensors can be located, design flexibility would be significantly harmed and complexity of the harness routing would make design very difficult. Also, these types of conveyor with weight sensors have to be ordered to a third party producing troughing roller assembly. These are usually more expensive and if the conveyor with weight sensors is not initially included in the road milling machine, it is hard to be included later on. However, height sensor of the present invention can be placed anywhere along the top surface of the conveyor cover. It is preferable to put the height sensor toward center of the conveyor width. The height sensor according to the present invention can be attached to laminar flow region of the conveyor which is 24, 25 in Fig. 1. Also, it can be used to almost any types of conveyor. Some conveyor already has height sensors as default so it is not needed to include them to utilize the present invention.
  • the microprocessor of the road milling machine discloses a method of calculating material volume or weight of the transporting vehicle by using material height in the conveyor and conveyor drive motor speed.
  • An operator would input information of desired truck load limit of a transporting vehicle and a type of material that the operator would mill with the road milling machine, to the microprocessor of the road milling machine. Then, the microprocessor would calculate material volume and weight using sensor-detected material height of the conveyor and conveyor drive motor speed.
  • the microprocessor calculates material cross sectional area in the conveyor using material height in detail according to the height level of the material in Example section later. Since we know specific measurements of the conveyor used on the specific road milling machine, the microprocessor can compute material cross sectional area using those measurements and the material height detected by a sensor located on the conveyor. Conveyor drive motor speed is usually used in a conventional road milling machine, thus most of the case the present invention can utilize this sensor. Then, the microprocessor can compute material volume using material cross sectional area and conveyor drive motor speed which is distance (length)/time. In other words, material cross sectional area multiplied by length of the conveyor would constitute the material volume.
  • the material density table is preferably providing density listing for types of materials that the road milling machine could conduct a milling process on the road consisting of those material.
  • the microprocessor would determine whether the weight or volume of the milled material is close to the desired truck load limit that the operator inputted before the operation.
  • warning could be given at X% of the truck load limit. It is preferable that the percentage is about 70% to 95% of truck load limit but it is up to the operator to decide at which point of the truck load, he/she wants to be alarmed.
  • the microprocessor could control to give an audible or a visible alarm or both to the operator. Otherwise, the information on truck loading can be given on the control panel. Either or both of material weight of the loaded material or material volume can be displayed on the control panel. This control panel warning can be given in addition to the audible or visible alarm or it can be given by itself.
  • Fig. 3 and 4 that show a cross sectional view and simplified cross sectional view of the conveyor belt of the road milling machine, measurements thereof would be used to calculate cross sectional area of loaded materials on the conveyor using the material height.
  • the height sensor located on top (cover) of the conveyor so that it can measure the height of the material moving on the conveyor 2. Measurements in Fig.
  • step two of the general solution first set triangular area equal to circular se ment area:
  • w base length of the triangular segment
  • ⁇ the angle of surcharge of the material
  • ⁇ the angle of the circular segment, sho n in the figure below.
  • ⁇ is defined in radians rather than degrees. Find the values of h from a known value of c from the part of the road milling machine to be used.
  • L is the length of the tapered belt edges
  • z represents the vertical distance between the end of the trapezoid and the beginning of the arc.
  • Total area can be written as a summation of the three geometric areas: 3
  • the microprocessor of the machine would input values every x number of milliseconds and creates a dataset of a set amount of values y , and calculate average. After this average for a set amount of time is calculated, the microprocessor would use the above equations to calculate volume of passing material. Once this volume for the time frame is calculated, the microprocessor would begin collecting new information for the next time frame, again calculating average and solving for volume. This will account for real-time increases in height due to increases in belt speed or reduction of milling belt angle.
  • An operator would input information of desired truck load limit of a transporting vehicle and a type of material that the operator would mill with the road milling machine, to the microprocessor of the road milling machine. Then, the microprocessor would calculate material volume and weight using sensor-detected conveyor drive motor speed and cutting depth of the road milling machine.
  • the material cross sectional area can be determined by using material cross sectional area and conveyor drive motor speed which is distance (length) /time. In other words, material cross sectional area multiplied by length the machine is working would constitute the material volume the road milling material milled during a specific time. Then, using the material type that operator inputted and a material density table, material weight can be calculated by the microprocessor. Material density equals weight/volume and we know volume and material density, thus we can get material weight easily by the microprocessor.
  • the material density table is preferably providing density listing for types of material where the road milling machine could conduct a milling process on.
  • the microprocessor would determine whether the weight or volume of the milled material is close to the desired truck load limit that the operator inputted before the operation.
  • warning could be given at X% of the truck load limit. It is preferable that the percentage is about 70% to 95% of truck load limit but it is up to the operator to decide at which point of the truck load, he/she wants to be alarmed.
  • the microprocessor could control to give an audible or a visible alarm or both to the operator. Otherwise, the information on truck loading can be given on the control panel. Either or both of material weight of the loaded material or material volume can be displayed on the control panel. This control panel warning can be given in addition to the audible or visible alarm or it can be given by itself.
  • FIG. 6 shows a schematic view of lift cylinders of the road milling machine
  • the method of determining cutting depth with these lift cylinders will be explained below.
  • FIG.l conventional road milling machines have four wheels as we can see two wheels 4, 5 from one side of the machine and there will be another set of two wheels on the other side of the machine.
  • Fig. 6 shows lift cylinders for all four wheels. Since the lift cylinders are connected to the wheels we can detect wheel position by tracking lift cylinder position.
  • the front tracks are sitting on the precut ground plane and the rear tracks are sitting on the milled road surface.
  • Cutting drum will be located between front lift cylinders 41, 81 and rear lift cylinders 51, 91.
  • front lift cylinders 41, 81 are located on a road which is not milled yet but the rear lift cylinders 51, 91 are located on an already milled road.
  • a road milling machine generally includes a body, a cutting drum rotatably mounted to the frame for removing material (e.g. asphalt, concrete) from a roadbed, and a conveyor.
  • the cutting drum is connected with the body by a drive assembly that includes a shaft, and operates by rotatably engaging with a road surface to remove material there from.
  • a drive assembly that includes a shaft, and operates by rotatably engaging with a road surface to remove material there from.
  • the depth of engagement of the drum generally must be increased in order to remove a desired quantity of material.
  • adjustment of the drum depth is achieved by vertically moving the body and thereby moving the connected drum assembly.
  • Cutting depth can be determined by tracking the position of the rear moldboard relative to the side skirts. Position sensors, limit switches, rope sensors or any kinds of known detector can be used to determine the height of the rear moldboard. The height of the side skirt is currently tracked with a rope sensor.
  • the present invention provides easy and affordable transporting vehicle load calculation without additional devices on the machine. It is easy to adopt, cost-efficient, and useful for providing relatively accurate weight measurement for a road milling machine.
  • the present invention also can provide warning signs to a user when the material load is close to preset percentage of the truck load limit so that a user can stop or slow down the operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Repair (AREA)

Abstract

L'invention concerne un procédé pratique et peu coûteux qui permet de peser une limite de charge de camion, ainsi qu'une fraiseuse routière ayant des dispositifs permettant d'assurer ce pesage et d'avertir un utilisateur lorsque la charge est proche d'une limite de charge de camion établie par l'utilisateur.
PCT/US2013/058202 2013-09-05 2013-09-05 Système de pesage pour une fraiseuse routière WO2015034497A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2013/058202 WO2015034497A1 (fr) 2013-09-05 2013-09-05 Système de pesage pour une fraiseuse routière

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2013/058202 WO2015034497A1 (fr) 2013-09-05 2013-09-05 Système de pesage pour une fraiseuse routière

Publications (1)

Publication Number Publication Date
WO2015034497A1 true WO2015034497A1 (fr) 2015-03-12

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3090968A1 (fr) * 2015-05-07 2016-11-09 Caterpillar Global Mining Europe GmbH Système de manipulation de matériau et son procédé de fonctionnement
US9915039B2 (en) 2013-09-05 2018-03-13 Volvo Construction Equipment Ab Device for cleaning the drum surface of asphalt compactors
US9938674B2 (en) 2015-05-27 2018-04-10 Caterpillar Paving Products Inc. Cold planer transport payload monitoring system
US9957675B2 (en) 2015-07-10 2018-05-01 Caterpillar Paving Products Inc. Cold planer loading and transport control system
US10208592B2 (en) 2015-12-02 2019-02-19 Joy Global Underground Mining Llc Longwall optimization control
US10308440B2 (en) 2017-10-23 2019-06-04 Caterpillar Paving Products Inc. System and method for managing speed of cold planer conveyor belt
CN111767595A (zh) * 2020-06-12 2020-10-13 中国二十冶集团有限公司 改建或扩建道路土方量和铣刨量的优化计算方法
WO2022002256A1 (fr) * 2020-07-03 2022-01-06 三一汽车制造有限公司 Procédé, système et appareil de commande de transport de matériau de machine de broyage, et machine de broyage
US11885080B2 (en) 2020-07-08 2024-01-30 Caterpillar Paving Products Inc. Material tracking for milling machines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269626A (en) * 1990-10-29 1993-12-14 Entreprise Jean Lefebvre Machine utilizing road-making materials
US6244782B1 (en) * 1998-03-20 2001-06-12 Bitelli Spa Finishing machine with a weighing device for the asphalt
EP1012396B1 (fr) * 1997-09-12 2002-06-19 WIRTGEN GmbH Engin pour travailler des chaussees
US20110121633A1 (en) * 2006-02-10 2011-05-26 Hall David R Billing System Integrated into a Milling Machine
US20120200138A1 (en) * 2010-02-08 2012-08-09 Wirtgen Gmbh Adaptive advance drive control for milling machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269626A (en) * 1990-10-29 1993-12-14 Entreprise Jean Lefebvre Machine utilizing road-making materials
EP1012396B1 (fr) * 1997-09-12 2002-06-19 WIRTGEN GmbH Engin pour travailler des chaussees
US6244782B1 (en) * 1998-03-20 2001-06-12 Bitelli Spa Finishing machine with a weighing device for the asphalt
US20110121633A1 (en) * 2006-02-10 2011-05-26 Hall David R Billing System Integrated into a Milling Machine
US20120200138A1 (en) * 2010-02-08 2012-08-09 Wirtgen Gmbh Adaptive advance drive control for milling machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9915039B2 (en) 2013-09-05 2018-03-13 Volvo Construction Equipment Ab Device for cleaning the drum surface of asphalt compactors
EP3090968A1 (fr) * 2015-05-07 2016-11-09 Caterpillar Global Mining Europe GmbH Système de manipulation de matériau et son procédé de fonctionnement
WO2016177460A1 (fr) * 2015-05-07 2016-11-10 Caterpillar Global Mining Europe Gmbh Système de manipulation de matériau et procédé pour faire fonctionner celui-ci
CN107709199A (zh) * 2015-05-07 2018-02-16 卡特彼勒环球矿业欧洲有限公司 物料搬运***及其操作方法
US9938674B2 (en) 2015-05-27 2018-04-10 Caterpillar Paving Products Inc. Cold planer transport payload monitoring system
CN115110387A (zh) * 2015-05-27 2022-09-27 卡特彼勒路面机械公司 具有传送负载监测***的铣刨机
US9957675B2 (en) 2015-07-10 2018-05-01 Caterpillar Paving Products Inc. Cold planer loading and transport control system
US10208592B2 (en) 2015-12-02 2019-02-19 Joy Global Underground Mining Llc Longwall optimization control
US10308440B2 (en) 2017-10-23 2019-06-04 Caterpillar Paving Products Inc. System and method for managing speed of cold planer conveyor belt
CN111767595A (zh) * 2020-06-12 2020-10-13 中国二十冶集团有限公司 改建或扩建道路土方量和铣刨量的优化计算方法
WO2022002256A1 (fr) * 2020-07-03 2022-01-06 三一汽车制造有限公司 Procédé, système et appareil de commande de transport de matériau de machine de broyage, et machine de broyage
US11885080B2 (en) 2020-07-08 2024-01-30 Caterpillar Paving Products Inc. Material tracking for milling machines

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