Abstract:
A method and apparatus for operating geography-altering machinery such as a track-type tractor, road grader, paver or the like relative to a work site to alter the geography of the site toward a desired condition. A first digital three-dimensional model (104) of the desired site geography, and a second digital three-dimensional model (106) of the actual site geography are stored in a digital data storage facility (126). The machine (10) is equipped with a position receiver to determine in three-dimensional space the location of the machine (10) relative to the site (12). A dynamic database (400) receives the machine position information, determines the difference between the first and second site models (104, 106) and generates representational signals of that difference for directing the operation of the machine (10) to bring the actual site geography into conformity with the desired site geography. In one embodiment, the signals representing the machine position and the difference between the first and second site models (104, 106) used to generate an operator display (108) which is updated in real time. Alternately, the signals representing the difference between the first and second site models (104, 106) can be supplied to automatic machine controls (128) for autonomous or semi-autonomous operation of the machine (10).
Abstract:
An apparatus (40, 50, 60) and method (100, 101, 102, 104, 106, 108, 108a, 109, 110) for directing the operations of multiple geography-altering machines (14) on a common work site (12) relative to one another. Position information from several machines (14) is shared to generate a common, dynamically-updated site database (66) showing the machines' relative positions and site progress in real time. The common site database (66) is used to direct the operation of one machine (14) with respect to another machine or machines (14), for example by generating an operator display (22) of the site (12) showing relative machine position and total machine work on the site (12). The operator can accordingly adjust the machine's operation to avoid interference with other machines (14) or unnecessary overlap of work on the site (12). The information can also be used to coordinate the operations of several machines (14) in complementary fashion. Machine position information can be broadcast from the machines (14) to the site database (66) to create a common, dynamically-updated database (66) which is then shared with one or more of the machines (14). In a particular embodiment each machine (14) is provided with its own dynamically-updated database (66) and operator display (22), and machine position information is shared on a continuous, real-time basis between the machines (14) so that they effectively share a common site database (66).
Abstract:
A method and apparatus for operating compacting machinery such as landfill, earth or asphalt compactors relative to a work site to compact the site material toward a desired degree of compaction. A first model (420) representing the desired degree of compaction of the site (12) and a second model (430) representing the actual degree of compaction of the site (12) are stored in a digital data storage facility (126). The machine (10) is equipped with a position receiver to determine in three-dimensional space the location of the compacting portions of the machine (10) relative to the site (12). A dynamic database (124) receives the machine positon information, determines the difference between the degree of compaction of the first and second site models (420, 430) and generates representational signals of that difference for directing the operation of the machine (10) to bring the actual degree of compaction of the site (12) into conformity with the desired degree of compaction. In one embodiment, the signals representing the machine position and the difference between the first and second site models (420, 430) are used to generate an operator display (22) which is updated in real time as the machine (10) operates over the site (12). Alternately, the signals representing the difference between the first and second site models (420, 430) can be supplied to automatic machine controls for automatic or semi-automatic operation of the machine (10).
Abstract:
A method (100-106 and 108-110) and apparatus (40, 50, 60) for monitoring in real time the removal of material from a land site (12) by a mobile machine (20). A digitized three dimensional model (104, 106) includes a model of the material to be removed and its characteristics. The instantaneous machine positon signal is generated by means (50) located in the machine (20). Loading signals are generated by the machine (20) and loading position is recorded in response to the loading signal. The invention includes a payload measurement system (65, 123) which measures each discrete load. The characteristics of the site material at the recorded loading position are correlated to the material removed from the site. A dynamic site database (66) is used to update the site (12) as material is removed and direct the machinery to a desired state.
Abstract:
An apparatus (702, 704, 706, 708, 802, 804, 806, 904, 906, 908, 910, 912) for determining the location of a work implement (102) at a work site is provided. The appartus (702, 704, 706, 708, 802, 804, 806, 904, 906, 908, 910, 912) includes an undercarriage (116), a car body (106) rotatably connected to the undercarriage (116), a boom (104) connected to the car body (106), a stick (110) connected to the boom (104), a work implement (108) connected to the stick (110), and a positioning system (802, 804, 806) including a receiver (202) connected to the stick (110) and a processor (704, 810, 818, 824) for determining the location of the receiver (202) in three dimensional space at a plurality of points as the car body (106) is rotated and for determining the location and orientation of the work implement (108).
Abstract:
An apparatus (10) and method for determining the position of a work implement (12) movably connected to a machine (16) utilizes first and second electromagnetic radiation receiving devices (18, 20) connected to the work implement (12) at predetermined spaced locations. A processor (24) determines the first and second current coordinate positions of the first and second receiving devices (18, 20) in a site coordinate system based on position signals from the first and second receiving devices (18, 20). The processor transforms the first and second receiving points (R, L) from a local coordinate system related to the machine (16) to the site coordinate system using a plane (98) passing through the first and second current coordinate positions and a mid-point (C) located along a substantially straight line (99) passing between first and second previously defined coordinate positions of the first and second receiving devices (18, 20). The processor (51) corrects the position of the first and second receiving points (R, L) in the site coordinate system based on sensed changes in the pitch of the implement (12).
Abstract:
An apparatus (10) and method for determining the position of a work implement (12) movably connected to a machine (16) utilizes first and second electromagnetic radiation receiving devices (18, 20) connected to the work implement (12) at predetermined spaced locations. A processor (24) determines the first and second current coordinate positions of the first and second receiving devices (18, 20) in a site coordinate system based on position signals from the first and second receiving devices (18, 20). The processor transforms the first and second receiving points (R, L) from a local coordinate system related to the machine (16) to the site coordinate system using a plane (98) passing through the first and second current coordinate positions and a mid-point (C) located along a substantially straight line (99) passing between first and second previously defined coordinate positions of the first and second receiving devices (18, 20). The processor (51) corrects the position of the first and second receiving points (R, L) in the site coordinate system based on sensed changes in the pitch of the implement (12).
Abstract:
A system and method (10) for automatically controlling the position of a work implement (12) movably connected to a work machine (16) and maintaining the work implement (12) at a preselected slope of cut relative to a geographic surface is provided. The system (10) has first and second receiving devices (18, 20) mounted on the work implement (12) for receiving position signals from a plurality of remote locations. A processor (24) determines the actual slope of cut of the work implement (12) based on the received position signals. An implement controller (122) delivers an implement control signal in response to a difference between the actual and a preselected desired slope of cut of the work implement (12). An implement control system (124) elevationally changes the slope of cut of the work implement (12) at an automatic mode of operation of the system (10). The system (10) is particularly suited for use on a geographic surface altering work machine (16).
Abstract:
An apparatus (702, 704, 706, 708, 802, 804, 806) is provided for determining the location of a digging implement (120) at a work site. The apparatus (702, 704, 706, 708, 802, 804, 806) includes an undercarriage (106), a car body (104) rotatably connected to the undercarriage (106), a receiver (125) connected to the car body (104), a positioning system (704, 805, 806) for determining the location of the receiver (125) in three dimensional space, the positioning system (704, 804, 806) determining the location of the receiver (125) at a plurality of points along an arc, and a processor (704, 818, 824) for determining the location and orientation of the car body (104) in response to the location of the plurality of points.