Patent Grant
9816253
The present invention relates to a display system of a work machine, a work machine, and a display method.
Generally, an operator operates an operating lever of a work machine such as an excavator, and a working unit, including a bucket, is thereby driven for construction such as excavation of the ground or the like as a work object. For example, in Patent Literature 1, an image of a bucket viewed from the side is displayed on a display unit.
Patent Literature 1: Japanese Laid-open Patent Publication No. 2012-172431
In a case where the type of bucket attached to a working unit is changed, if a shape of the bucket displayed on a display unit is not corresponding to a shape of the modified bucket, the relationship between the bucket displayed on the display unit and the target surface may not be displayed properly when the changed bucket is indicated to an operator of a work machine. As a result, there is a possibility of giving discomfort to the operator of the work machine.
An object of the present invention is to reduce the discomfort to the operator when displaying several types of buckets on the display unit.
According to the present invention, a display system of a work machine that has a working unit with a bucket attached thereto, the display system of the work machine comprises a generation unit that generates drawing information to draw an image of the bucket viewed from a side using information of shape and size of the bucket, and a display unit that displays the image of the bucket viewed from the side and an image that indicates a cross-section of landform based on the drawing information generated by the generation unit. The information of the shape and size of the bucket includes, in the side view of the bucket, a distance between a blade edge of the bucket and a bucket pin that attaches the bucket to the working unit, an angle formed by a straight line that connects the blade edge and the bucket pin and a straight line that indicates a bottom surface of the bucket, a position of the blade edge, a position of the bucket pin, and at least one position on the outer side of the bucket between a portion that couples the bucket to the working unit and the blade edge.
According to the present invention, a display system of a work machine that has a working unit with a bucket attached thereto, the display system of the work machine comprises a generation unit that generates drawing information to draw an image of the bucket viewed from the side using information of shape and size of the bucket, and a display unit that displays the image of the bucket viewed from the side and an image indicating a cross-section of landform based on the drawing information generated by the generation unit. The information of the shape and size of the bucket includes, in the side view of the bucket, a distance between a blade edge of the bucket and a bucket pin that attaches the bucket to the working unit, an angle formed by a straight line that connects the blade edge and the bucket pin and a straight line that indicates a bottom surface of the bucket, a position of the blade edge, a position of the bucket pin, and at least one position on the outer side of the bucket between a portion that couples the bucket to the working unit and the blade edge.
According to the present invention, a display system of a work machine that has a working unit with a bucket attached thereto, the display system of the work machine comprises a generation unit that generates drawing information to draw an image of the bucket viewed from the side using information of shape and size of the bucket, and a display unit that displays the image of the bucket viewed from the side and an image that indicates a cross-section of landform based on the drawing information generated by the generation unit. The information of the shape and size of the bucket includes, in the side view of the bucket, a distance between a blade edge of the bucket and a bucket pin that attaches the bucket to the working unit, an angle formed by a straight line that connects the blade edge and the bucket pin and a straight line indicating a bottom surface of the bucket, a length of the bottom surface of the bucket viewed from the side, a length from the bucket pin to at least one position on the outer side of the bucket between a portion that couples the bucket to the working unit and the blade edge, an angle formed by a straight line that connects the blade edge and the bucket pin and a straight line from the bucket pin to at least one position on the outer side of the bucket between the portion that couples the bucket to the working unit and the blade edge, a length of, in the side view of the bucket, a straight line that connects the bucket pin and a position of a bucket rear side end at the bottom surface, and an angle formed by a straight line that connects the blade edge and the bucket pin and a straight line that connects the bucket pin and the position of the bucket rear side end at the bottom surface.
In the present invention, it is preferable that the generation unit changes first drawing information of a first portion which is a portion that couples a bucket cylinder that drives the bucket and an arm of the working unit to the bucket and second drawing information of a second portion which is a portion from the first portion to the blade edge, based on the information of the shape and size of the bucket using the first drawing information and the second drawing information, obtains third drawing information by generating information of a figure that passes through at least one position on the outer side of the bucket, the position being between the blade edge and the first portion, and generates the drawing information using the first drawing information, the second drawing information, and the third drawing information.
In the present invention, it is preferable that the display unit displays, together with the image of the bucket viewed from the side, information of a target construction surface indicating a target shape of a construction object of the work machine.
According to the present invention, a work machine comprises the display system of the work machine described above.
According to the present invention, a display method comprises generating drawing information to draw an image of a bucket, included in a work machine, viewed from the side using information of shape and size of the bucket, and displaying the image of the bucket viewed from the side and an image indicating a cross-section of landform based on the drawing information generated by the generation unit. The information of the shape and size of the bucket includes, in the side view of the bucket, a distance between a blade edge of the bucket and a bucket pin that attaches the bucket to the working unit, a distance between the bucket pin and a predetermined position at an outer side of the bucket, and an angle formed by a straight line that connects the bucket pin and the blade edge of the bucket and a straight line that connects the bucket pin and the predetermined position.
According to the present invention, a display method comprises generating drawing information to draw an image of a bucket, included in a work machine, viewed from the side using information of shape and size of the bucket, and displaying the image of the bucket viewed from the side and an image indicating a cross-section of landform based on the drawing information generated by the generation unit. The information of the shape and size of the bucket includes, in the side view of the bucket, a distance between a blade edge of the bucket and a bucket pin that attaches the bucket to the working unit, an angle formed by a straight line that connects the blade edge and the bucket pin and a straight line indicating a bottom surface of the bucket, a length of the bottom surface of the bucket viewed from the side, a length from the bucket pin to at least one position on the outer side of the bucket between a portion that couples the bucket to the working unit and the blade edge, an angle formed by a straight line that connects the blade edge and the bucket pin and a straight line from the bucket pin to at least one position on the outer side of the bucket between the portion that couples the bucket to the working unit and the blade edge, a length of, in the side view of the bucket, a straight line that connects the bucket pin and a position of a bucket rear side end at the bottom surface, and an angle formed by a straight line that connects the blade edge and the bucket pin and a straight line that connects the bucket pin and the position of the bucket rear side end at the bottom surface.
It is preferable to change first drawing information of a first portion which is a portion that couples the bucket cylinder that drives the bucket and an arm of the working unit to the bucket and second drawing information of a second portion which is a portion from the first portion to the blade edge based on the information of the shape and size of the bucket using the first drawing information and the second drawing information, obtain third drawing information by generating information of a figure that passes through at least one position on the outer side of the bucket, the position being between the blade edge and the first portion, and generate the drawing information using the first drawing information, the second drawing information, and the third drawing information.
The present invention can reduce the discomfort to the operator when displaying several types of buckets on the display unit.
A mode to implement (embodiment of) the present invention will be described in detail with reference to the drawings.
<Overall Configuration of Work Machine>
In the embodiment, the excavator 100 uses, for example, an internal combustion engine such as a diesel engine as an engine which is a power generation device, but the power generation device is not limited to the internal combustion engine. The power generation device of the excavator 100 may be a so-called hybrid device, which is, for example, a combination of an internal combustion engine, a generator motor, and a power storage device. In addition, the power generation device of the excavator 100 may be a device obtained by combining the power storage device and the generator motor without the internal combustion engine.
The upper swing body 3 has an operator room 4. The operator room 4 is placed on the other end side of the upper swing body 3. That is, the operator room 4 is arranged at a side opposite to the machine room 3EG. In the operator room 4, a display unit 29 and an operating device 25 illustrated in
The upper swing body 3 is mounted on the traveling device 5. The traveling device 5 has crawler tracks 5a and 5b. The traveling device 5 is driven by one of, or both of hydraulic motors 5c provided on the left and right sides. By rotating the crawler tracks 5a and 5b of the traveling device 5, the excavator 100 is caused to travel. The working unit 2 is attached to the side of the operator room 4 of the upper swing body 3.
The working unit 2 has a boom 6, an arm 7, a bucket 8 which is an example of working tools, a boom cylinder 10, an arm cylinder 11, and a bucket cylinder 12. A base end portion of the boom 6 is turnably attached to a front portion of the vehicle main body 1 via a boom pin 13. A base end portion of the arm 7 is turnably attached to a tip portion of the boom 6 via an arm pin 14. The bucket 8 is attached to a tip portion of the arm 7 via a bucket pin 15. The bucket 8 is coupled to the bucket cylinder 12 via a link pin 16 and a link 17. The bucket 8 turns about the bucket pin 15. The bucket 8 has a plurality of blades 8B attached on the opposite side to the bucket pin 15. A blade edge 8T is a tip of the blade 8B.
The bucket 8 does not need to have a plurality of blades 8B. In other words, the bucket 8 may be a bucket in which the blade edge is formed in a straight shape by a steel sheet without having the plurality of blades 8B as illustrated in
The boom cylinder 10, the arm cylinder 11, and the bucket cylinder 12 illustrated in
Antennas 21 and 22 are provided above the upper swing body 3. The antennas 21 and 22 are used for detecting the current position of the excavator 100. The antennas 21 and 22 are electrically connected to a global coordinate calculation unit 23 illustrated in
The global coordinate calculation unit 23 is a position detection device that detects the position of the excavator 100. The global coordinate calculation unit 23 is a position detection device that detects the current position of the excavator 100 using the real time kinematic-global navigation satellite systems (RTK-GNSS). In the following description, the antennas 21 and 22 are appropriately referred to as GNSS antennas 21 and 22. A signal according to a GNSS radio wave received by the GNSS antennas 21 and 22 is input to the global coordinate calculation unit 23. The global coordinate calculation unit 23 determines the setting positions of the GNSS antennas 21 and 22 in the global coordinate system.
The global coordinate calculation unit 23 obtains two reference position data P1 and P2 represented by the global coordinate system. The global coordinate calculation unit 23 generates swing body arrangement data indicating the arrangement of the upper swing body 3 based on the two reference position data P1 and P2. In the embodiment, the swing body arrangement data includes the reference position data P1 and/or P2, and information of orientation of the upper swing body 3 generated based on the two reference position data P1 and P2. The two GNSS antennas 21 and 22 may configure a GPS compass, and may obtain the information of the orientation of the upper swing body 3. In other words, the global coordinate calculation unit 23 may calculate an orientation angle from the relative position of the two GNSS antennas 21 and 22 without outputting the reference position data P1 and P2 of both of the GNSS antennas 21 and 22, and determine the orientation angle as an orientation of the swing body.
The operating device 25 has a left operating lever 25L, a right operating lever 25R, a left traveling lever 25FL, and a right traveling lever 25FR. The operator of the excavator 100, by operating the left operating lever 25L and the right operating lever 25R, controls operation of the working unit 2 and the upper swing body 3 and performs construction, such as excavation, to the ground or the like which is the work object. The operator drives the hydraulic motor 5c to cause the excavator 100 to travel by operating the left traveling lever 25FL and the right traveling lever 25FR. In the embodiment, the left operating lever 25L, the right operating lever 25R, the left traveling lever 25FL, and the right traveling lever 25FR are levers of a pilot pressure system, but are not limited to this. The left operating lever 25L, the right operating lever 25R, the left traveling lever 25FL, and the right traveling lever 25FR may be, for example, levers of an electric system.
The working unit controller 26, which is an example of a working unit control unit, has a processing unit 26P and a storage unit 26M. The working unit controller 26 is a device that controls the operation of the working unit 2. The processing unit 26P controls the operation of the working unit 2, and the storage unit 26M stores necessary computer programs and control data for controlling the operation of the working unit 2. During construction by the excavator 100, the working unit 2 is controlled so that the position of the working unit 2, which is the position of the blade edge 8T of the bucket 8 in the embodiment, does not invade the target construction surface indicating the target shape of the construction object. This control is appropriately referred to as working unit control. In the embodiment, the position of the blade edge 8T is determined by the display controller 28, but it may be determined by a device other than the display controller 28.
The sensor controller 27 has a processing unit 27P and a storage unit 27M. Various sensors that detect the state of the excavator 100 are connected to the sensor controller 27. The sensor controller 27 converts information obtained from the various sensors into a format that can be handled by other devices included in the excavator 100, and then outputs the information. The information of the state of the excavator 100 includes, for example, information of a posture of the excavator 100 and information of a posture of the working unit 2. In the example illustrated in
The IMU 24 detects an angular velocity and acceleration of the excavator 100. A posture angle of the excavator 100 is obtained from the angular velocity and the acceleration of the excavator 100. The first working unit posture detection unit 18A detects the operation amount of the boom cylinder 10. The second working unit posture detection unit 18B detects the operation amount of the arm cylinder 11. The third working unit posture detection unit 180 detects the operation amount of the bucket cylinder 12. From the operation amount of the boom cylinder 10, the operation amount of the arm cylinder 11, and the operation amount of the bucket cylinder 12, the information representing the posture of the working unit 2 is obtained. The information representing the posture of the working unit 2 is defined by, for example, an angle θ1 formed by the boom 6 and the upper swing body 3, an angle θ2 formed by the boom 6 and the arm 7, and an angle θ3 formed by the arm 7 and the bucket 8. The first working unit posture detection unit 18A, the second working unit posture detection unit 18B, and the third working unit posture detection unit 18C may be potentiometers that detect the angle θ1, the angle θ2, and the angle θ3.
The sensor controller 27 obtains the information of the position of the excavator 100 in the global coordinate and the orientation of the upper swing body 3 determined by the global coordinate calculation unit 23, the information of the angular velocity and the acceleration of the excavator 100 obtained by the IMU 24, and the information representing the posture of the working unit 2. The sensor controller 27 outputs the obtained information of the position of the excavator 100 in the global coordinate and the orientation of the upper swing body 3 and the information representing the posture of the working unit 2 to the display controller 28. The processing unit 27P of the sensor controller 27 implements the functions of the sensor controller 27. The storage unit 27M stores a computer program and data necessary for implementing the functions of the sensor controller 27.
The display controller 28 has a processing unit 28P and a storage unit 28M. The display unit 29 is connected to the display controller 28. The display unit 29 is a device that displays an image and, for example, a touch panel having an operation function and a display function can be used. For example, a liquid crystal display panel or an organic electroluminescence (EL) panel is used for the display unit 29. The display controller 28 generates drawing information of the image displayed on the display unit 29. In the example illustrated in
In addition, on the guidance image IG, for example, a line indicating the cross-section of a target construction surface 70 which indicates the target shape of the construction object (a target construction surface line 79 described later), a ground-contacting surface of the excavator 100 which is not the construction object, and a line indicating the cross-section of the surrounding ground are displayed. In other words, the display controller 28 displays an image that indicates the cross-section of the landform on the guidance image IG. On the guidance image IG, the whole excavator 100 including the bucket 8 may be displayed, or the extracted bucket 8 including the working unit 2 may be displayed. Alternatively, the extracted bucket 8 may be displayed on the guidance image IG.
The display controller 28 determines the position of the working unit 2 using the position of the excavator 100 in the global coordinate and the orientation of the upper swing body 3 obtained from the sensor controller 27, the information representing the posture of the working unit 2, and the information indicating the size of the working unit 2. The information that indicates the size of the working unit 2 is, for example, stored in advance in the storage unit 28M of the display controller 28. The position of the working unit 2 determined by the display controller 28 is, for example, a position of the blade edge 8T of the bucket 8. The position of the blade edge 8T of the bucket 8 determined by the display controller 28 is a position in the global coordinate system. The display controller 28 simultaneously displays the determined position of the blade edge 8T and the target construction surface 70 on the display unit 29 in a case where the guidance image IG is displayed on the display unit 29. The operator of the excavator 100 can easily grasp the positional relationship between the positions of the blade edge 8T and the target construction surface 70 from the guidance image IG displayed on the display unit 29, and therefore, the working efficiency is improved. In the embodiment, the position of the blade edge 8T is determined by the display controller 28, but it may be determined by a device other than the display controller 28.
The display controller 28, for example, generates drawing information to draw the side of the bucket 8 using information of the shape and size of the bucket 8 in a case where the guidance image IG is displayed on the display unit 29. In the embodiment, the display controller 28 is an example of the generation unit. The display unit 29 displays the image of the side of the bucket 8 based on the drawing information generated by the display controller 28.
The processing unit 28P of the display controller 28 implements the functions of the display controller 28 such as generating the drawing information to draw an image of the bucket 8 viewed from the side, and generating the drawing information of the target construction surface 70 included in the guidance image IG. The storage unit 28M stores a computer program and data necessary for implementing the functions of the display controller 28. The data includes, for example, information of a designed landform for generating the target construction surface 70, and the information of the size of the working unit 2.
An input device 281 is connected to the display controller 28. The input device 281 inputs the information of the shape and size of the bucket 8 to the display controller 28, and outputs a command for switching a display of the display unit 29 to the display controller 28. In the embodiment, the input device 281 is configured of a touch panel, or an operating member of a hard key, a switch, or the like. In a case where the input device 281 is of a touch panel type, the display unit 29 is a touch panel as described above, and the input device 281 and the display unit 29 are integrated with each other.
The processing unit 26P of the working unit controller 26, the processing unit 27P of the sensor controller 27, and the processing unit 28P of the display controller 28 are implemented with a processor such as a central processing unit (CPU), and a memory. At least one of a nonvolatile or volatile semiconductor memory such as a random access memory (RAM), a random access memory (ROM), a flash memory, an erasable programmable random access memory (EPROM), and an electrically erasable programmable random access memory (EEPROM), a magnetic disk, a flexible disk, and a magnetic optical disk is used for the storage unit 26M of the working unit controller 26, the storage unit 27M of the sensor controller 27, and the storage unit 28M of the display controller 28.
<Guidance Image IG>
The guidance image IG is displayed on a screen 29P of the display unit 29. The guidance image IG includes a front view 53a and a side view 53b. The front view 53a indicates a designed surface 45 that includes a designed landform of a construction area, that is, the target construction surface 70, and a current position of the excavator 100. The side view 53b indicates a positional relationship between the target construction surface 70 and the excavator 100. The front view 53a of the guidance image IG represents the designed landform in a front view by a plurality of triangle polygons. As illustrated in the front view 53a, the display controller 28 causes the display unit 29 to display the whole plurality of triangle polygons as the designed surface 45 or the target construction surface 70.
The target construction surface 70 selected as the target work object from the plurality of designed surfaces 45 is displayed in a different color from other designed surfaces 45. For example, in a case where the touch panel is used for the display unit 29, the operator of the excavator 100 can select the target construction surface 70 by touching a place that corresponds to the target construction surface 70 among the plurality of designed surfaces 45 displayed on the screen 29P. In the front view 53a of
The guidance image IG includes an image that indicates the positional relationship between the target construction surface 70 and the blade edge 8T of the bucket 8, and distance information that indicates a distance between the target construction surface 70 and the blade edge 8T of the bucket 8. In the embodiment, the side view 53b includes a target construction surface line 79, an icon 75 of the excavator 100 viewed from the side, an icon 90 of the bucket 8 viewed from the side, and a ground LND in contact with the excavator 100. The target construction surface line 79 indicates a cross section of the target construction surface 70. The target construction surface line 79 is obtained by calculating an intersection line of a plane parallel to the center of the working unit passing through the current position of the blade edge 8T of the bucket 8 and the designed surface 45. The intersection line is determined by the processing unit 28P of the display controller 28. The plane parallel to the center of the working unit is, for example, a plane that passes through the center of the bucket pin 15 in the width direction illustrated in
In the side view 53b, the distance information that indicates the distance between the target construction surface 70 and the blade edge 8T of the bucket 8 includes graphic information 84. The distance between the target construction surface 70 and the blade edge 8T of the bucket 8 is, for example, a distance between a point at which a line drawn down from the blade edge 8T toward the target construction surface 70 in the vertical direction (the direction of gravity) intersects with the target construction surface 70, and the blade edge 8T. Alternatively, the distance between the target construction surface 70 and the blade edge 8T of the bucket 8 may be a distance between an intersection point generated when a perpendicular is drawn down from the blade edge 8T to the target construction surface 70, and the blade edge 8T.
The graphic information 84 is information that graphically indicates the distance between the blade edge 8T of the bucket 8 and the target construction surface 70. The graphic information 84 is a guidance index for indicating the position of the blade edge 8T of the bucket 8. A numerical distance between the target construction surface line 79 and the excavator 100 (not illustrated) for indicating a positional relationship therebetween may be displayed on the guidance image IG. The operator of the excavator 100 can easily excavate the ground so that the current landform becomes the designed landform (target construction surface 70) by moving the blade edge 8T of the bucket 8 along the target construction surface line 79.
The display controller 28 illustrated in
The bucket 8 is attached to the arm 7 illustrated in
The outer side 8K of the bucket 8 has a curved surface portion 8HH and the bottom surface 8BT. The curved surface portion 8HH is a portion between the attaching portion 8F and the blade edge 8T, and formed of a curved surface. The bottom surface 8BT is a portion between the blade edge 8T and the attaching portion 8F, and formed of a flat surface. Therefore, when the bucket 8 is viewed from the side surface 8S, the bottom surface 8BT is a straight line. A boundary between the bottom surface 8BT and the curved surface portion 8HH is a position A. The curved surface portion 8HH is from the bucket pin 15 to the position A. The bottom surface 8BT is from the blade edge 8T to the position A. The position A is at the rear side of the bucket 8, that is, on the side of the curved surface portion 8HH, and is a rear side end of the bottom surface 8BT. The position A is a position of the bucket rear side end at the bottom surface 8BT.
A center axis line AX1 of the bucket pin 15 is a center of turn of the bucket 8. In the side view of the bucket 8, the blade edge 8T and the bucket pin 15 of the bucket 8, more specifically, a straight line that connects the blade edge 8T and the center axis line AX1 of the bucket pin 15 is referred to as a first straight line LN1. Additionally, in the side view of the bucket 8, a straight line that indicates the bottom surface 8BT of the bucket 8 is appropriately referred to as a second straight line LN2.
The storage unit 28M of the display controller 28 illustrated in
In the side view of the bucket 8, the bucket length L3 is a distance between the blade edge 8T of the bucket 8 and the bucket pin 15, more specifically, a distance between the blade edge 8T and the center axis line AX1 of the bucket pin 15 (corresponds to the first straight line LN1). The bucket length L3 is a straight line that connects the blade edge 8T and the bucket pin 15. In the side view of the bucket 8, the angle α is an angle formed by the first straight line LN1 and the second straight line LN2. In the side view of the bucket 8, the position Q is a position of the blade edge 8T of the bucket 8. Hereinafter, the position of the blade edge 8T is appropriately referred to as a blade edge position Q. In the side view of the bucket 8, the position S is a position of the bucket pin 15, more specifically, a position of the center axis line AX1 of the bucket pin 15. At least one position on the outer side 8K of the bucket 8, between the attaching portion 8F and the blade edge 8T, is at least one of positions A, B, C, and D in the example illustrated in
The angles φa, φb, φc, φd, and φe illustrated in
From the information of the shape and size of the bucket 8, a length LBT of the bottom surface 8BT in the side view of the bucket 8, that is, the length LBT of the second straight line LN2, and the angle α are obtained. The length LBT of the bottom surface 8BT is determined by Formula (1), and the angle α is determined by Formula (2). The angle φa is an angle formed by the first straight line LN1 and a straight line that connects the center axis line AX1 and the position A. The length LA is a length of a straight line that connects the bucket pin 15, specifically the center axis line AX1, and the position A in the side view of the bucket 8. The length LA is a length of a straight line, in the side view of the bucket 8, that connects the bucket pin 15 and the position A of the bucket rear side end at the bottom surface 8BT. The angle α can be determined by the angle φa. Therefore, the angle α may not be included in the information that represents the shape and size of the bucket 8.
LBT=√{L32+LA2−2×L3×LA×cos(φa)} (1)
α=cos−1{(L32+LBT2−LA2)/(2×L3×LBT)} (2)
The first drawing information 91 is information for displaying an image of the first portion 8F on the display unit 29, and is a set of a plurality of pixels. The second drawing information 92 is information for displaying an image of the second portion 8GP on the display unit 29, and is a set of a plurality of pixels. The second portion 8GP is from the first portion 8F to the blade edge 8T of the bucket 8, and a portion that occupies a predetermined area from the opening portion 8G of the bucket 8 toward the inner side of the bucket 8. The second portion 8GP includes a part of the side surface 8S, and the blade 8B.
In the first drawing information 91, a position R as a reference is set in addition to the position E, and the position S of the bucket pin 15. The position R is a position on the side of a portion 94R that corresponds to the link side 8FR of the attaching portion 8F, and on the side of the second drawing information 92. In the second drawing information 92, a position P as a reference is set in addition to the blade edge position Q, and the position S of the bucket pin 15. The position P is a position on the side of the blade 8B, which is the inner side of the bucket 8.
In the embodiment, the first drawing information 91 and the second drawing information 92 are elements for reference. The display controller 28 generates the drawing information of the bucket 8 by deforming or rotating the first drawing information 91 and the second drawing information 92 using the information that represents the shape and size of the bucket 8 currently attached to the working unit 2 of the excavator 100. Next, a method of generating drawing information to draw the image of the bucket 8 viewed from the side and displaying the drawing information on the display unit 29, that is, the display method according to the embodiment will be described. The display method according to the embodiment is executed by the display controller 28.
When the display method according to the embodiment is executed, a command that specifies the bucket 8 attached to the working unit 2 is input by the input device 281 illustrated in
The processing unit 28P, as illustrated in
After obtaining the angle αr, the processing unit 28P changes the second drawing information 92. In this case, for example, the processing unit 28P, as illustrated in
As illustrated in
As illustrated in
In the embodiment, the ground LND displayed in the guidance image IG may be one of or all of a line that indicates the cross-section of the target construction surface 70 which indicates the target shape of the construction object (the target construction surface line 79), a ground-contacting surface of the excavator 100 which is not the construction object, and an image that indicates the cross-section of the surrounding ground (for example, a line image).
The comparative example displays an icon 900, which is an image of the bucket 8 viewed from the side, on the display unit 29 based on drawing information generated by only the bucket length L3 of the bucket 8, the angle α, and a length of a portion that corresponds to a straight line of the bottom surface 8BT. There is a case where the icon 900 cannot represent the shape of the bucket 8. Therefore, for example, when the excavator 100 brings the bucket 8 into contact with the ground LND, although the operator, as illustrated in
There is a possibility that the display of the guidance image IG and the actual state of the working unit 2 do not match, and the operator of the excavator 100 feels discomfort. Therefore, in the comparative example illustrated in
According to the display system 102 and the display method of the embodiment, which have been described in the embodiment, it is possible to display the icon 90, which is an image of the bucket 8 viewed from the side, on the display unit 29 based on the drawing information that has been properly generated using the information of the shape and size of the bucket 8. As described above, the icon 90 is properly displayed using the information of the shape and size of the bucket 8. Therefore, for example, in a case where the bucket 8 of the excavator 100 is brought into contact with the ground LND, the state in which the icon 90 is brought into contact with the ground LND is displayed in the guidance image IG, as illustrated in
In the embodiment, it is preferable that the position on the outer side 8K of the bucket 8, between the attaching portion 8F and the blade edge 8T, include a position at a farthest distance from the opening portion 8G in the side view of the bucket 8. The position at the farthest distance from the opening portion 8G is a portion of the outer side 8K including an intersection point Xb in a case where a distance between an intersection point Xa and the intersection point Xb is the longest. At a cross-section of the bucket 8 perpendicular to the center axis line AX1, the intersection point Xa is an intersection point of an imaginary line IL perpendicular to the first straight line LN1 and an opening end of the bucket 8 that defines the opening portion 8G, and the intersection point Xb is an intersection point of the imaginary line IL and the outer side 8K of the bucket 8. According to this, the display controller 28 can generate the
In a case where a position on the outer side 8K of the bucket 8, between the attaching portion 8F and the blade edge 8T, is one, it is preferable that the position be a position at the farthest distance from the opening portion 8G in the side view of the bucket 8. Similar to that described above, the position at the farthest distance from the opening portion 8G is a portion of the outer side 8K including the intersection point Xb in a case where a distance between the intersection point Xa and the intersection point Xb is the longest. According to this, the display controller 28 can generate the
In the bucket 8a for slope construction, an entire outer surface of the bottom plate 8BP becomes a bottom surface 8BTa. An end portion of the bottom plate 8BP on the side of the rear plate 8Ba is a position A which is a boundary between the bottom surface 8BTa and a portion other than the bottom surface 8BTa. The position A is a position at the farthest distance from an opening portion 8G of the bucket 8a for slope construction. A length from a blade edge 8Ta to the position A is also a length LBT of the bottom surface 8BTa in the bucket 8a for slope construction. Also for the bucket 8a for slope construction, similar to the bucket 8 illustrated in
The drawing information 90ai is generated by the processing unit 28P combining first drawing information 91a, second drawing information 92a, and third drawing information 98a. The second drawing information 92a is deformed so that an angle formed by the first straight line LN1 and the second straight line LN2 becomes the same as the angle αr formed by the first straight line LN1 and the second straight line LN2 of the bucket 8a for slope construction attached to the working unit 2. This processing of deformation is the same as that described above.
The third drawing information 98a is a set of pixels on and inside a
Thus, also for the bucket 8a for slope construction, similar to the ordinary bucket 8, the drawing information 90ai is generated. The bucket 8a for slope construction is also generated using the information of the shape and size of the bucket 8a for slope construction. Therefore, the shape of the bucket 8a for slope construction that is actually attached to the working unit 2 is represented on the screen of the display unit 29. As a result, since the display of the guidance image IG and the actual state of the working unit 2 match, the operator of the excavator 100 does not feel discomfort, and can grasp the actual state of the working unit 2 from the guidance image IG.
The display controller 28, including the generation unit, can generate the
The processing unit 28P uses, as the third drawing information 98b, the pixels on the
In the embodiment described above, as illustrated in
As in the third drawing information 98 of the embodiment described above, the
It is preferable for the
The predetermined position H at the outer side 8K of the bucket 8 should be at least one position on the outer side 8K of the bucket 8. The display controller 28 can represent the outline of the bucket 8 more accurately by using the plurality of predetermined positions H. In the side view of the bucket 8 illustrated in
In the embodiment and the modified example, the drawing information to draw an image of the bucket 8 viewed from the side is generated using the information of the shape and size of the bucket 8, and the image of the bucket 8 viewed from the side is displayed on the display unit 29 based on such drawing information. In this way, in the embodiment and the modified example, the shape of the bucket 8 actually attached to the working unit 2 can be represented and displayed on the display unit 29. Therefore, the discomfort to the operator can be reduced. Additionally, in the embodiment and the modified example, information about construction status can be comprehensibly provided to the operator.
In the embodiment and the modified example, the drawing information is generated using the information of the shape and size of the bucket 8. Therefore, it is not necessary to store, in the storage unit 28M of the display controller 28, a plurality of graphic data (image information) that indicates the shape of the bucket, depending on the type of bucket. For this reason, in the embodiment and the modified example, storage capacity for storing the information to generate the drawing information can be reduced when any of the several types of the bucket is displayed on the display unit 29. Therefore, it is possible to reduce a load on hardware resources. Additionally, in the embodiment and the modified example, it is not necessary to store in advance the graphic data (image information) that indicates the shape of the bucket. Therefore, time for creating graphic data (image information) in advance can be saved and, for example, display corresponding to the bucket 8 that has a variety of curved surface portions 8HH can be executed. The information of the shape and size of the bucket 8 is stored in advance in the storage unit or the like of the control device included in the excavator as information of the calibration of the excavator 100. Therefore, in the embodiment and the modified example, there is also an advantage that information the excavator 100 already has can be used.
In the embodiment and the modified example, the image of the bucket 8 viewed from the side is displayed on the display unit 29 in the excavator 100, but it is not limited to this. For example, in a case where the excavator 100 is operated by remote control from a control facility, the image of the bucket 8 viewed from the side may be displayed on a screen of a display device provided on an operating device of the control facility. In this case, a processing device of the control facility may generate drawing information to draw an image of the bucket 8 viewed from the side using the information of the shape and size of the bucket 8. Alternatively, the processing device of the control facility may acquire the drawing information generated by the display controller 28 of the excavator 100 through communication, and may display the image based on the drawing information on the display device of the control facility. The display device of the management device may be a portable terminal device equipped with an image display function.
The present embodiment and the modified example are not limited to the contents described above. The components described above may include components readily conceivable by those skilled in the art, components substantially identical, and so-called equivalents. Additionally, the components described above can be suitably combined. Furthermore, various kinds of omission, replacement, and modification may be made in the components in the scope not departing from the gist of the present embodiment and the modified example.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2015/080033 | 10/23/2015 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2016/056674 | 4/14/2016 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 9493929 | Kurihara et al. | Nov 2016 | B2 |
| 20080289108 | Menkedick | Nov 2008 | A1 |
| 20140100712 | Nomura | Apr 2014 | A1 |
| 20150218781 | Nomura | Aug 2015 | A1 |
| 20160010312 | Kurihara et al. | Jan 2016 | A1 |
| 20160054114 | Crozier | Feb 2016 | A1 |
| Number | Date | Country |
|---|---|---|
| 2006-200185 | Aug 2006 | JP |
| 2006-214246 | Aug 2006 | JP |
| 2012-172431 | Sep 2012 | JP |
| 2014-101664 | Jun 2014 | JP |
| 10-2015-0067369 | Jun 2015 | KR |
| Entry |
|---|
| International Search Report and Written Opinion dated Jan. 19, 2016, issued for PCT/JP2015/080033. |
| Number | Date | Country | |
|---|---|---|---|
| 20170114526 A1 | Apr 2017 | US |
