EP4317584A1 - Asphalt finisher, and construction support system for asphalt finisher - Google Patents

Asphalt finisher, and construction support system for asphalt finisher Download PDF

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Publication number
EP4317584A1
EP4317584A1 EP22780825.0A EP22780825A EP4317584A1 EP 4317584 A1 EP4317584 A1 EP 4317584A1 EP 22780825 A EP22780825 A EP 22780825A EP 4317584 A1 EP4317584 A1 EP 4317584A1
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EP
European Patent Office
Prior art keywords
dump truck
asphalt finisher
right direction
offset
tractor
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.)
Pending
Application number
EP22780825.0A
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German (de)
English (en)
French (fr)
Inventor
Hisaho Mino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo SHI Construction Machinery Co Ltd
Original Assignee
Sumitomo SHI Construction Machinery Co Ltd
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 Sumitomo SHI Construction Machinery Co Ltd filed Critical Sumitomo SHI Construction Machinery Co Ltd
Publication of EP4317584A1 publication Critical patent/EP4317584A1/en
Pending legal-status Critical Current

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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
    • 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
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • 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
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/02—Feeding devices for pavers
    • E01C2301/04—Independent shuttles

Definitions

  • the present disclosure relates to an asphalt finisher, and a construction support system for an asphalt finisher.
  • an asphalt finisher including a tractor; a hopper; a conveyor that conveys a paving agent in the hopper to a rear side of the tractor; a screw that spreads the paving material conveyed by the conveyor; and a screed that levels the paving material behind the screw (refer to PTL 1).
  • the asphalt finisher performs asphalt pavement construction while receiving a supply of the paving material from a cargo bed of a dump truck adjacent at the front to the hopper. At this time, a driver of the dump truck brings the dump truck closer to the asphalt finisher while reversing the dump truck, and docks the dump truck at a predetermined position for supplying the paving material to the hopper.
  • an object of the present invention is to provide a technique capable of suppressing an offset in a left-right direction during the docking of a dump truck with an asphalt finisher.
  • an asphalt finisher including: a tractor; a hopper installed on a front side of the tractor to receive a paving material; a conveyor that conveys the paving material in the hopper to a rear side of the tractor; a screw that spreads the paving material, which is conveyed by the conveyor, behind the tractor; a screed that levels the paving material, which is spread by the screw, behind the screw; and a display unit that displays information regarding an offset in a left-right direction between a dump truck at a front and the asphalt finisher toward the dump truck.
  • a construction support system for an asphalt finisher including a tractor, a hopper installed on a front side of the tractor to receive a paving material, a conveyor that conveys the paving material in the hopper to a rear side of the tractor, a screw that spreads the paving material, which is conveyed by the conveyor, behind the tractor, and a screed that levels the paving material, which is spread by the screw, behind the screw, the system including: at least one of a display unit that displays information regarding an offset in a left-right direction between a dump truck at a front and the asphalt finisher toward the dump truck and a transmission unit that transmits the information regarding the offset in the left-right direction between the dump truck and the asphalt finisher to an outside.
  • Fig. 1 is a diagram showing one example of the asphalt finisher 100 according to the present embodiment. Specifically, Figs. 1A to 1C are a left side view, a top view, and a rear view of the asphalt finisher 100, respectively. Hereinafter, the front, rear, left, right, up, and down directions are used as directions as viewed from the asphalt finisher 100.
  • Figs. 1A to 1C show a state where a screed 3 is most extended in a vehicle width direction (left-right direction).
  • the asphalt finisher 100 includes a tractor 1, a hopper 2, and the screed 3.
  • the tractor 1 corresponds to a main body of the asphalt finisher 100, and causes the asphalt finisher 100 to travel.
  • the tractor 1 causes the asphalt finisher 100 to travel, for example, by rotating front wheels and rear wheels using a traveling hydraulic motor.
  • the traveling hydraulic motor rotates by receiving a supply of hydraulic oil from a hydraulic source (for example, a traveling hydraulic pump) mounted in the asphalt finisher.
  • a controller 30, a main monitor 60, a driver's seat 61, an imaging device 62, an audio output device 63, an indicator 64, and the like are mounted in the tractor 1.
  • the controller 30 is stored inside a frame 1a of the tractor 1.
  • the main monitor 60 and the driver's seat 61 are provided in a cab installed on an upper surface of the tractor 1.
  • the imaging device 62 and the audio output device 63 are installed at a central portion of a front end of the upper surface of the tractor 1.
  • the indicator 64 is installed on a right side portion of the tractor 1.
  • the indicator 64 may be installed on a left side portion of the tractor 1, or the indicators 64 may be installed on both the right side portion and the left side portion of the tractor 1.
  • the indicator 64 may be installed at any place as long as a driver of a dump truck that approaches in reverse from a position in front of the asphalt finisher 100 to supply a paving material to the hopper 2 can visually recognize the indicator 64 directly or indirectly through a rearview mirror or a side mirror.
  • the indicator 64 may be disposed to project outward from a right side portion of the frame 1a of the tractor 1 and to be located inside an end portion 3b of the screed 3 during use.
  • the indicator 64 may be configured to be foldable so as to fit within a vehicle width of the asphalt finisher 100 during non-use.
  • the hopper 2 receives the paving material supplied from a cargo bed of the dump truck.
  • the paving material is, for example, an asphalt mixture or the like.
  • the hopper 2 is provided at a front portion of the tractor 1.
  • the hopper 2 is configured to be openable and closable in the vehicle width direction (left-right direction) by a hopper cylinder 2a.
  • the asphalt finisher 100 receives the paving material from the cargo bed of the dump truck as a paving material transport vehicle in a state where the hopper 2 is fully opened.
  • the asphalt finisher 100 continues traveling (performing construction) while pushing the dump truck forward through a push roller 2b.
  • the paving material received into the hopper 2 is fed to the screed 3 using a conveyor and a screw.
  • the screed 3 levels the paving material spread over a roadbed by a screw.
  • the screed 3 is a floating screed towed by the tractor 1, and is connected to the tractor 1 through a leveling arm 3a.
  • Fig. 2 is a diagram showing one example of a configuration of the front monitoring system 150.
  • the front monitoring system 150 (one example of a construction support system) monitors a region in front of the asphalt finisher 100.
  • the front monitoring system 150 provides a user with a function of monitoring the approaching situation of the dump truck that approaches in reverse from a position in front of the asphalt finisher 100 to supply the paving material to the hopper 2 (hereinafter, "dump approaching situation monitoring function”.
  • the front monitoring system 150 may provide a user with a function of monitoring the presence or absence of an object between the dump truck approaching in reverse from a position in front of the asphalt finisher 100 and the asphalt finisher 100 (hereinafter, "object presence/absence monitoring function").
  • the object monitoring function may be an incidental function that is executed when the dump approaching situation monitoring function is enabled.
  • the front monitoring system 150 includes the controller 30, the main monitor 60, the imaging device 62, the audio output device 63, and the indicator 64.
  • the controller 30 performs control related to various front monitoring functions (for example, the dump approaching situation monitoring function, the object presence/absence monitoring function, and the like) by the front monitoring system 150.
  • various front monitoring functions for example, the dump approaching situation monitoring function, the object presence/absence monitoring function, and the like
  • the controller 30 may be a dedicated controller for the front monitoring system 150, or may be a controller that is also used for controlling other functions of the asphalt finisher 100.
  • the function of the controller 30 related to the front monitoring system 150 may be shared by a plurality of controllers.
  • the function of the controller 30 may be realized by any hardware, a combination of any hardware and software, or the like.
  • the controller 30 is mainly composed of, for example, a computer including a central processing unit (CPU), a memory device such as random access memory (RAM), an auxiliary storage device such as a read only memory (ROM), an interface device for the input and output of information from the outside, and the like.
  • the controller 30 realizes various functions by loading a program, which is installed in the auxiliary storage device, into the memory device and by causing the CPU to execute the program.
  • the controller 30 includes a determination unit 31 and an alerting unit 32 as functional units.
  • the main monitor 60 displays various information to the driver of the asphalt finisher 100.
  • the main monitor 60 is, for example, a liquid crystal display or an organic electroluminescence (EL) display.
  • the main monitor 60 can display various information under the control of the controller 30.
  • the main monitor 60 may include an input device (for example, a button, a toggle, a lever, a touch panel incorporated into a panel of a liquid crystal display, or the like) that receives an operation input of the driver of the asphalt finisher 100.
  • the imaging device 62 (one example of an acquisition unit) captures an image of space in front of the asphalt finisher 100 to acquire the image (captured image) of the space.
  • the imaging device 62 may include, for example, a monocular camera, a stereo camera, a distance image camera, a depth camera, a three-dimensional camera, an infrared camera, or the like.
  • the imaging device 62 outputs the acquired image data, and the image data output from the imaging device 62 is taken in by the controller 30.
  • the front monitoring system 150 may include a distance sensor (one example of an acquisition unit) capable of measuring a distance to an object in the space in front of the asphalt finisher 100.
  • the distance sensor may include, for example, a light detecting and ranging (LIDAR), a millimeter wave radar, an ultrasonic sensor, or the like. A signal corresponding to the measurement result output from the distance sensor may be taken in by the controller 30.
  • LIDAR light detecting and ranging
  • a signal corresponding to the measurement result output from the distance sensor may be taken in by the controller 30.
  • the audio output device 63 outputs audio toward the surroundings including the space in front of the asphalt finisher 100.
  • the audio output device 63 is, for example, a speaker, a buzzer, or the like. Under the control of the controller 30, the audio output device 63 can output a predetermined sound to the driver of the dump truck in front of the asphalt finisher 100, a worker between the dump truck and the asphalt finisher, or the like. In addition, the audio output device 63 may output, for example, an audio message under the control of the controller 30.
  • the indicator 64 (one example of a display unit) is configured to display visual information such that the visual information can be visually recognized by the driver of the dump truck, a worker, or the like in front of the asphalt finisher 100.
  • the indicator 64 is disposed such that a display region of the indicator 64 faces forward.
  • the indicator 64 is, for example, a compact electronic bulletin board using a large number of light emitting diodes (LEDs) disposed in a matrix pattern, a liquid crystal panel, an organic EL panel, or the like.
  • LEDs light emitting diodes
  • the indicator 64 is disposed above the frame 1a in which the controller 30 is stored, namely, the indicator 64 is disposed at a position higher than an upper surface of the frame 1a.
  • the indicator 64 can display various information under the control of the controller 30.
  • the indicator 64 may display a reverse instruction to the driver of the dump truck loaded with the paving material in front of the asphalt finisher 100, and notifies the driver that the dump truck can be reversed.
  • the determination unit 31 performs various determinations related to the front monitoring functions based on the output data of the imaging device 62 or the distance sensor.
  • the determination unit 31 performs a determination related to the dump approaching situation monitoring function.
  • the determination unit 31 may determine whether or not an offset amount in the left-right direction between the dump truck and the asphalt finisher 100 is within a predetermined range.
  • the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 represents an offset amount in the left-right direction between a center axis of the dump truck in the vehicle width direction and a center axis of the asphalt finisher 100 (hopper 2) in the vehicle width direction (left-right direction).
  • the determination unit 31 may simply determine the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 as an offset amount between a center of a rear end portion of the dump truck in the vehicle width direction and a center of the asphalt finisher 100 in the vehicle width direction (left-right direction). In addition, the determination unit 31 may consider a case where the center axis of the dump truck in the vehicle width direction and the center axis of the asphalt finisher 100 in the vehicle width direction (left-right direction) are not parallel to each other.
  • the case where the center axis of the dump truck in the vehicle width direction and the center axis of the asphalt finisher 100 in the vehicle width direction (left-right direction) are not parallel to each other corresponds to a case where a reverse direction of the dump truck is oblique with respect to a vehicle length direction of the asphalt finisher 100.
  • the determination unit 31 may determine the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 as an offset amount between both the center axes at a predetermined front-rear position as viewed from the asphalt finisher 100.
  • the predetermined front-rear position may be, for example, a front end position of the hopper 2 or the like.
  • the predetermined range is defined as a range in the left-right direction in which the cargo bed of the dump truck and the hopper 2 do not come into contact with each other with a certain degree of margin when the dump truck reaches a docking position where a rear wheel tire of the dump truck and the push roller 2b come into contact with each other (hereinafter, simply a "docking position").
  • the predetermined range may be fixed as a predefined range, or may be variable depending on the size of the dump truck in the vehicle width direction, the size of the asphalt finisher 100 in the vehicle width direction in which the front monitoring system 150 is mounted, or the like.
  • the determination unit 31 applies a known image processing technique or an image recognition technique using machine learning, to recognize the dump truck in front of the asphalt finisher 100 and to recognize the center axis (center) of the dump truck in the vehicle width direction. Then, the determination unit 31 may determine whether or not the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 is within the predetermined range, based on the left-right position of the recognized center axis (center) of the dump truck in the vehicle width direction with respect to the asphalt finisher 100. In addition, when the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 deviates from the predetermined range, the determination unit 31 may output a deviation amount and a deviation direction (a left direction or a right direction) together.
  • the dump approaching situation monitoring function may be manually switched between enabled (ON) and disabled (OFF) according to a predetermined input received from an operator of the asphalt finisher 100. Namely, the operator may visually recognize a situation where the dump truck approaches from a position in front of the asphalt finisher 100 to supply the paving material, may perform a predetermined input through the input device of the main monitor 60 or the like, and may enable (ON) the dump approaching situation monitoring function. In this case, for example, when the dump approaching situation monitoring function is switched to an enabled state, the determination unit 31 recognizes the dump truck in front of the asphalt finisher 100 based on the image data of the imaging device 62.
  • the determination unit 31 when the determination unit 31 recognizes the dump truck in front of the asphalt finisher 100, the determination unit 31 repeatedly calculates an offset amount in the vehicle width direction between the dump truck and the asphalt finisher 100 at each predetermined control cycle, and determines whether or not the offset amount is within the predetermined range. The determination process may be continued until any of the conditions such as the dump truck reaching a predetermined docking position, the dump truck not being recognized, and the dump approaching situation monitoring function being disabled (OFF) is satisfied.
  • the dump approaching situation monitoring function may be automatically switched between enabled (ON) and disabled (OFF).
  • the front monitoring system 150 may be provided with a function of automatically recognizing a situation where the dump truck that supplies the paving material to the hopper 2 approaches in reverse from a position in front of the asphalt finisher 100 (hereinafter, "dump approach recognition function").
  • the controller 30 repeats a process of attempting to recognize the dump truck approaching in reverse or having the possibility of approaching in reverse from a position in front of the asphalt finisher 100 at each predetermined control cycle, based on the captured image of the imaging device 62.
  • the controller 30 may perform the process of recognizing the dump truck in consideration of the presence or absence of the paving material on the cargo bed of the dump truck. Then, when the controller 30 recognizes the dump truck approaching or having the possibility of approaching in reverse from a position in front of the asphalt finisher 100, the controller 30 may automatically transit the dump approaching situation monitoring function to an enabled (ON) state.
  • the determination unit 31 may perform a determination related to the object presence/absence monitoring function.
  • the determination unit 31 determines the presence or absence of an object to be monitored (hereinafter, "monitored object") between the dump truck approaching in reverse from a position in front of the asphalt finisher 100 and the asphalt finisher 100.
  • the monitored object may include a person such as a worker and small machines such as a road cone, a rammer, or a tamper.
  • the determination unit 31 may apply a known image processing technique or an image recognition technique using machine learning or the like, to recognize the presence or absence of an object at a front-rear position between the dump truck and the asphalt finisher 100 and to recognize the type of the object when the object is recognized. Then, the determination unit 31 may determine the presence or absence of the monitored object between the dump truck and the asphalt finisher 100 by recognizing an object between the dump truck and the asphalt finisher 100 and by determining whether or not the type of the object corresponds to the monitored object.
  • the alerting unit 32 prompts the operator of the asphalt finisher 100, the driver of the dump truck, surrounding workers, and the like to be alert through the audio output device 63, the indicator 64, or the like, based on the determination result of the determination unit 31. Specifically, in synchronization with the determination unit 31, the alerting unit 32 repeats a process of prompting the operator of the asphalt finisher 100, the driver of the dump truck, the surrounding workers, and the like to be alert at each predetermined control cycle, based on the determination result of the determination unit 31.
  • the alerting unit 32 alerts the driver of the dump truck, for example, based on the determination result by the determination unit 31 as to whether or not the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 is within the predetermined range.
  • the alerting unit 32 may cause the indicator 64 to display a message that the dump truck can be reversed as it is (refer to Fig. 3 to be described later). Accordingly, the driver of the dump truck can check display contents of the indicator 64 through the rearview mirror or the side mirror, and can recognize that the dump truck may be reversed in the current state.
  • the alerting unit 32 may cause the indicator 64 to display alert information (refer to Fig. 4 to be described later).
  • the alerting unit 32 may cause the indicator 64 to display information notifying that an offset occurs, such as an offset amount or an offset direction (hereinafter, "left-right offset notification information").
  • the alerting unit 32 may cause the indicator 64 to display information notifying that the offset amount deviates from the predetermined range (for example, information representing a deviation amount, a deviation direction, or the like) (hereinafter, "deviation notification information").
  • the driver of the dump truck can recognize the occurrence of an offset of the dump truck with respect to the asphalt finisher 100 in the left-right direction and the direction or degree of the offset, and can correct the left-right position of the dump truck according to the recognition.
  • the alerting unit 32 may cause the indicator 64 to display information that prompts the elimination of the state of deviation of the offset amount from the predetermined range (hereinafter, "deviation elimination information").
  • the deviation elimination information may include, for example, information representing a direction, a return amount, or the like for returning the offset amount to within the predetermined range.
  • the deviation elimination information may include, for example, information representing a direction, a return amount, or the like for eliminating the offset itself in the left-right direction between the dump truck and the asphalt finisher 100, namely, making the offset substantially zero. Accordingly, the driver of the dump truck can directly identify the direction or degree of a correction for the left-right position of the dump truck to eliminate the state of deviation, and can execute the elimination of the state of deviation.
  • the alerting unit 32 may convey the deviation notification information or the deviation elimination information toward the driver of the dump truck through the audio output device 63.
  • the alerting unit 32 may change the contents (level) of the alert information according to the degree of a deviation of the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 from the predetermined range. For example, when the degree of the deviation of the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 from the predetermined range is relatively small, the alerting unit 32 may cause the indicator 64 to display the deviation notification information or the deviation elimination information.
  • the alerting unit 32 may cause the indicator 64 to display information instructing the dump truck to decelerate or stop in reverse (hereinafter, "deceleration/stop instruction information") (refer to Fig. 5 to be described later).
  • deceleration/stop instruction information instructing the dump truck to decelerate or stop in reverse
  • the case where the degree of the deviation of the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 from the predetermined range is relatively small corresponds to, for example, a case where there is a low possibility that the dump truck comes into contact with the hopper 2 when the dump truck is reversed to the docking position is low, but the distance is very narrow.
  • the case where the degree of the deviation of the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 from the predetermined range is relatively large corresponds to, for example, a case where there is a high possibility that the dump truck collides with the hopper 2 when the dump truck is reversed to the docking position.
  • the alerting unit 32 can change the level of the alert information according to the degree of the deviation of the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 from the predetermined range, and can prompt the driver to perform an appropriate driving operation.
  • the alerting unit 32 alerts the driver of the dump truck and surrounding workers based on the determination result by the determination unit 31 as to the presence or absence of the monitored object between the dump truck and the asphalt finisher 100.
  • the alerting unit 32 causes the indicator 64 to display the alert information.
  • the alerting unit 32 may cause the indicator 64 to display information representing that the monitored object is present between the dump truck and the asphalt finisher 100 (hereinafter, "monitored object presence information"). Accordingly, after the driver of the dump truck recognizes the presence of the monitored object, the driver can drive the dump truck in reverse while checking the presence of the monitored object through the rearview mirror or the side mirror, to avoid contact between the monitored object and the dump truck.
  • the alerting unit 32 may cause the indicator 64 to display information instructing the dump truck to decelerate or stop (deceleration/stop instruction information).
  • the driver of the dump truck can decelerate or stop the dump truck according to the instruction to directly avoid contact between the monitored object and the dump truck.
  • the alerting unit 32 may convey the monitored object presence information toward the driver of the dump truck, surrounding workers, or the like through the audio output device 63.
  • the alerting unit 32 may convey the deceleration/stop instruction information toward the driver of the dump truck through the audio output device 63.
  • the driver of the dump truck can be notified of support information during docking.
  • Fig. 3 is a diagram describing a first example of operation of the front monitoring system 150. Specifically, Fig. 3 is a left side view 300A and a top view 300B showing a first example of a situation where a dump truck 200 approaches in reverse from a position in front of the asphalt finisher 100 to supply the paving material.
  • a range RM1 indicated by the one-dot chain line represents a space range reflected on a rearview mirror M1 of the dump truck 200
  • a range RM2 indicated by the two-dot chain line represents a space range reflected on a right side mirror M2 of the dump truck 200.
  • a center axis of the dump truck 200 in the vehicle width direction and the center axis of the asphalt finisher 100 in the vehicle width direction are aligned at substantially the same position in the left-right direction.
  • the controller 30 determines that an offset amount in the left-right direction between the dump truck 200 and the asphalt finisher 100 is substantially zero and is within the predetermined range. For this reason, the controller 30 (alerting unit 32) causes the indicator 64 to display information indicating that the dump truck can be reversed as it is.
  • the indicator 64 displays an image of "o", which indicates that the dump truck can be reversed as it is, at a central portion 64A of the display region of the indicator 64 in an up-down direction. Accordingly, a driver can check the indicator 64 through the rearview mirror M1 or the right side mirror M2, and can identify that there is no problem even when the dump truck is reversed in the current state.
  • the indicator 64 displays information on a remaining distance to a docking position ("remaining 5.0 m") at an upper portion 64B of the display region of the indicator 64 in the up-down direction.
  • the controller 30 may recognize a positional relationship between the imaging device 62 or the distance sensor and the dump truck 200 in a front-rear direction based on the output data of the imaging device 62 or the distance sensor, and may calculate the remaining distance from the dump truck 200 to the docking position. Accordingly, the driver can specifically identify the remaining distance to the docking position as a numerical value.
  • the indicator 64 displays character information, which represents the remaining distance from the dump truck 200 to the docking position, in mirrored characters that are left-right reversed.
  • the driver of the dump truck 200 has checked the indicator 64 through the rearview mirror M1 or the right side mirror M2, the driver can appropriately recognize the character information representing the remaining distance.
  • information representing the remaining distance from the dump truck 200 to the docking position may be displayed on the indicator 64 as information in another format instead of or in addition to the character information.
  • the remaining distance from the dump truck 200 to the docking position may be displayed on the indicator 64 by means of a bar graph that changes continuously or stepwise (discretely).
  • the driver of the dump truck 200 can visually recognize the distance between the dump truck 200 and the asphalt finisher 100 from a change in the bar graph displayed on the indicator 64.
  • Fig. 4 is a diagram describing the second example of operation of the front monitoring system 150. Specifically, Fig. 4 is a left side view 400A and a top view 400B showing a second example of a situation where the dump truck 200 approaches in reverse from a position in front of the asphalt finisher 100 to supply the paving material.
  • an offset GP1 in the right direction of the center axis of the dump truck 200 in the vehicle width direction with respect to the center axis of the asphalt finisher 100 in the vehicle width direction occurs.
  • the controller 30 determines that the offset amount in the left-right direction between the dump truck 200 and the asphalt finisher 100 deviates from the predetermined range.
  • the controller 30 causes the indicator 64 to display the deviation elimination information as alert information.
  • the indicator 64 displays an arrow image (" ⁇ "), which indicates a return direction for eliminating the state of deviation of the offset amount from the predetermined range (in this example, the left direction), at the central portion 64A of the display region of the indicator 64 in the up-down direction.
  • the indicator 64 displays information ("return by 50 cm"), which indicates a return amount (in this example, 50 cm) for eliminating the state of deviation of the offset amount from the predetermined range, at a lower portion 64C of the display region of the indicator 64 in the up-down direction.
  • the driver can check the indicator 64 through the rearview mirror M1 or the right side mirror M2, and can easily recognize that the position of the dump truck 200 in the left-right direction has to be corrected to the left side by 50 cm.
  • the indicator 64 displays character information, which represents a return amount for eliminating the state of deviation of the offset amount from the predetermined range, in mirrored characters that are left-right reversed. Accordingly, when the driver of the dump truck 200 has checked the indicator 64 through the rearview mirror M1 or the right side mirror M2, the driver can appropriately recognize the character information representing the return amount for eliminating the state of deviation of the offset amount from the predetermined range.
  • the indicator 64 may display the deviation notification information instead of the deviation elimination information.
  • the indicator 64 may display an arrow image (" ⁇ ") indicating a deviation direction (in this example, the right direction) at the central portion 64A of the display region of the indicator 64 in the up-down direction, and may display information indicating a deviation amount (in this example, 50 cm) at the lower portion 64C.
  • the indicator 64 displays information on a remaining distance to the docking position ("remaining 5.0 m") at the upper portion 64B of the display region of the indicator 64 in the up-down direction. Accordingly, similarly to the case of the first example described above, the driver can specifically identify the remaining distance to the docking position as a numerical value.
  • Fig. 5 is a diagram describing a third example of operation of the front monitoring system 150.
  • Fig. 4 is a left side view 500A and a top view 500B showing a third example of a situation where the dump truck 200 approaches in reverse from a position in front of the asphalt finisher 100 to supply the paving material.
  • an offset GP2 in the right direction of the center axis of the dump truck 200 in the vehicle width direction with respect to the center axis of the asphalt finisher 100 in the vehicle width direction occurs.
  • the controller 30 determines that the offset amount in the left-right direction between the dump truck 200 and the asphalt finisher 100 deviates from the predetermined range.
  • the degree of a deviation of the offset GP2 from the predetermined range is relatively large, and there is a high possibility that the dump truck 200 collides with the hopper 2 when the dump truck 200 is reversed to the docking position in this state. For this reason, the controller 30 (alerting unit 32) causes the indicator 64 to display the deceleration/stop instruction information as alert information.
  • the indicator 64 displays information (" ⁇ "), which instructs the dump truck 200 to stop reversing, at the central portion 64A of the display region of the indicator 64 in the up-down direction.
  • the indicator 64 displays information, which indicates the possibility of contact between the dump truck 200 and the asphalt finisher 100 ("contact"), at the lower portion 64C of the display region of the indicator 64 in the up-down direction. Accordingly, the driver of the dump truck 200 can check the indicator 64 through the rearview mirror M1 or the right side mirror M2, can stop the reverse of the dump truck 200 for the moment, and can align the position of the dump truck 200 in the left-right direction while driving forward.
  • the driver of the dump truck can appropriately adjust the position of the dump truck in the left-right direction with respect to the asphalt finisher 100, and then can reverse the dump truck 200 toward the asphalt finisher 100 again.
  • the indicator 64 displays character information, which indicates the possibility of contact between the dump truck 200 and the asphalt finisher 100, in mirrored characters that are left-right reversed. Accordingly, when the driver of the dump truck 200 has checked the indicator 64 through the rearview mirror M1 or the right side mirror M2, the driver can appropriately recognize the character information indicating the possibility of contact between the dump truck 200 and the asphalt finisher 100.
  • the indicator 64 displays information on a remaining distance to the docking position ("remaining 5.0 m") at the upper portion 64B of the display region of the indicator 64 in the up-down direction. Accordingly, similarly to the case of the first example described above, the driver can specifically identify the remaining distance to the docking position as a numerical value.
  • the front monitoring system 150 may convey information to the driver of the dump truck in front of the asphalt finisher 100 using a monitor or an audio output device in a cabin of the dump truck instead of or in addition to the audio output device 63 or the indicator 64.
  • the front monitoring system 150 may convey information to the driver of the dump truck in front of the asphalt finisher 100 using a user terminal that the driver brings into the cabin of the dump truck, instead of or in addition to the audio output device 63 or the indicator 64.
  • the user terminal include portable terminal devices (mobile terminals) that the driver can bring into the cabin of the dump truck, such as a smartphone, a tablet terminal, and a laptop computer terminal.
  • the controller 30 may transmit a signal containing information to at least one of the dump truck and the user terminal through a predetermined communication line using a communication device that is built-in or connected to the outside.
  • the monitor in the cabin of the dump truck can display the information toward the driver based on the signal received from the asphalt finisher 100 through a communication device mounted in the dump truck.
  • the audio output device in the cabin of the dump truck can notify the driver of information using sound based on the signal received from the asphalt finisher 100 through the communication device mounted in the dump truck.
  • the user terminal can notify the driver of information by displaying the information in a display region or by outputting the information using sound through a speaker based on the signal received from the asphalt finisher 100 through a communication device mounted in the terminal.
  • the communication device of the dump truck and the communication device of the asphalt finisher 100 may be directly connected to each other to be able to communicate with each other through short-range communication.
  • the alerting unit 32 may transmit a signal containing information indicating that the dump truck can be reversed as it is to the dump truck or the user terminal.
  • the alerting unit 32 may transmit a signal containing alert information to the dump truck or the user terminal.
  • the alert information includes the deviation notification information, the deviation elimination information, the deceleration/stop instruction information, and the like.
  • the alerting unit 32 may transmit a signal containing alert information to the dump truck or the user terminal.
  • the alert information includes the monitored object presence information, the deceleration/stop instruction information, or the like.
  • the driver of the dump truck can be notified of support information during docking through the monitor or the audio output device installed in the cabin of the dump truck or through the user terminal (mobile terminal) that the driver of the dump truck brings into the cabin.
  • the front monitoring system 150 may be able both to notify the driver of the dump truck of support information using the indicator 64 and to notify the driver of the dump truck of support information using communication between the dump truck or the user terminal and the front monitoring system 150.
  • the asphalt finisher 100 (front monitoring system 150) includes the indicator 64 that displays information regarding an offset in the left-right direction between the dump truck at the front and the asphalt finisher 100 toward the dump truck.
  • the asphalt finisher 100 (front monitoring system 150) enables the driver of the dump truck to identify the presence or absence of an offset in the left-right direction between the dump truck and the asphalt finisher 100, the degree of the offset, or the like using the indicator 64.
  • the asphalt finisher 100 front monitoring system 150
  • the asphalt finisher 100 can appropriately support the driver of the dump truck in performing a driving operation for docking the dump truck with the asphalt finisher 100, and can suppress contact between the dump truck and the asphalt finisher 100.
  • the asphalt finisher 100 front monitoring system 150
  • the asphalt finisher 100 may include the imaging device 62, the distance sensor, or the like that acquires data related to an offset in the left-right direction between the dump truck and the asphalt finisher. Then, when the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 based on the data acquired by the imaging device 62, the distance sensor, or the like deviates from the predetermined range, the indicator 64 may display alert information toward the dump truck.
  • the asphalt finisher 100 front monitoring system 150
  • the asphalt finisher 100 can prompt the driver of the dump truck to be alert in a situation where the offset amount between the dump truck and the asphalt finisher is relatively large.
  • the indicator 64 may display a remaining distance until the dump truck reaches a predetermined position (docking position) for supplying the paving material to the hopper 2, toward the dump truck.
  • the driver of the dump truck can easily identify the remaining distance to the docking position as a specific numerical value.
  • the indicator 64 may display the degree of an offset in the left-right direction between the dump truck and the asphalt finisher 100 (for example, an offset amount itself or a deviation amount from the predetermined range) toward the dump truck.
  • the indicator 64 may display a return amount for suppressing an offset in the left-right direction between the dump truck and the asphalt finisher 100 (for example, a return amount for eliminating the deviation from the predetermined range or a return amount for eliminating the offset itself) toward the dump truck.
  • the driver of the dump truck can identify information required for a driving operation for eliminating the offset between the dump truck and the asphalt finisher 100, as a specific numerical value.
  • the asphalt finisher 100 can appropriately support the driver of the dump truck in performing a driving operation for docking the dump truck with the asphalt finisher 100, and can suppress contact between the dump truck and the asphalt finisher 100.
  • the indicator 64 may change the contents of the alert information according to the degree of the deviation of the offset amount in the left-right direction between the dump truck and the asphalt finisher 100 from the predetermined range.
  • the asphalt finisher 100 can change the contents (level) of the alert according to the possibility of contact between the dump truck and the asphalt finisher 100. For this reason, the asphalt finisher 100 can appropriately support the driver of the dump truck in performing a driving operation for docking the dump truck with the asphalt finisher 100, and can suppress contact between the dump truck and the asphalt finisher 100.
  • the asphalt finisher 100 may include the controller 30 that transmits information regarding an offset in the left-right direction between the dump truck at the front and the asphalt finisher 100 to the outside (for example, the dump truck or the user terminal of the driver thereof).
  • the asphalt finisher 100 (front monitoring system 150) enables the driver of the dump truck to identify the presence or absence of an offset in the left-right direction between the dump truck and the asphalt finisher 100, the degree of the offset, or the like through an external device. For this reason, the asphalt finisher 100 (front monitoring system 150) can appropriately support the driver of the dump truck in performing a driving operation for docking the dump truck with the asphalt finisher 100, and can suppress contact between the dump truck and the asphalt finisher 100.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
EP22780825.0A 2021-03-30 2022-03-28 Asphalt finisher, and construction support system for asphalt finisher Pending EP4317584A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021057824 2021-03-30
PCT/JP2022/015211 WO2022210614A1 (ja) 2021-03-30 2022-03-28 アスファルトフィニッシャ、アスファルトフィニッシャの施工支援システム

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EP4317584A1 true EP4317584A1 (en) 2024-02-07

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EP22780825.0A Pending EP4317584A1 (en) 2021-03-30 2022-03-28 Asphalt finisher, and construction support system for asphalt finisher

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EP (1) EP4317584A1 (zh)
JP (1) JPWO2022210614A1 (zh)
CN (1) CN116940735A (zh)
WO (1) WO2022210614A1 (zh)

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Publication number Priority date Publication date Assignee Title
JPH0743133Y2 (ja) * 1991-04-17 1995-10-04 株式会社新潟鉄工所 アスファルトフィニッシャにおけるダンプカーの誘導装置
JPH083445Y2 (ja) * 1993-04-09 1996-01-31 建設省東北地方建設局長 舗装工事車両におけるダンプカーの誘導装置
JP6748602B2 (ja) * 2017-05-09 2020-09-02 鹿島道路株式会社 車両誘導システム
CN113597490A (zh) * 2019-03-25 2021-11-02 住友建机株式会社 沥青滚平机
JP6714747B2 (ja) 2019-03-29 2020-06-24 住友建機株式会社 アスファルトフィニッシャ

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