Abstract:
PROBLEM TO BE SOLVED: To provide an improved machinery control method and a controller for guaranteeing the dynamic stabilization of machinery (for example, a bulldozer) in operation with a relatively high speed. SOLUTION: A ground leveling machine is provided with first and second satellite antennas 104 and 106 installed thereon in the longitudinal direction. A third satellite navigation antenna 108 is installed on a column 110 attached to a movable component of the ground leveling machine. According to an embodiment of this invention, the ground leveling machine refers to a bulldozer 102 and the movable component its blade 112. The machine is also equipped with a gravity reference sensor and a plurality of gyroscopes installed thereon. A computer processor generates machine control signals in accordance with the sensor data received from various components of the machine. The system and method disclosed by the invention allow the dynamic stabilization of ground leveling machine during its operation with a relatively fast speed without developing undesired vibrations. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PURPOSE:To make an accurate run by utilizing a laser beam to constitute the unmanned movement system for a moving body. CONSTITUTION:Beacons A and B as laser light sources are installed at two positions which are at a distance L. The moving body V mounts photodetectors 1 and 2 at a distance l from each other. Laser beams emitted from the beacons A and B are modulated by codes for discriminating those two beacons A and B and pieces of angle information on their emission azimuths, and those pieces of information in the photodetected laser beams are demodulated to discriminate the current position of the moving body. The laser beacons A and B have light emitting devices 3 rotated by motors 4 and emit vertically long slit beams through lens systems 5 and slits 6. The azimuth angle of each emitted laser light is detected by a rotary encoder 7 provided on a rotating shaft and inputted to a computer 8. The computer 8 generates a modulating signal corresponding to the azimuth angle to impose modulation on the laser right source 9.
Abstract:
A method for guiding a terrestrial vehicle along a desired path can include receiving a position signal from a global navigation satellite system (GNSS) antenna and a gyro signal from a gyro sensor that is indicative of: (i) at least one of a pitch and a roll of the terrestrial vehicle, and (ii) a gyro-based heading direction. A position of a point of interest of the terrestrial vehicle at a location different from the GNSS antenna can be determined based on the position signal, the gyro signal, and a positional relationship between the GNSS antenna location and the location of the point of interest. A position-based heading direction of the point of interest of the terrestrial vehicle can be determined based on the determined position of the point of interest and at least one previously determined position of the point of interest. A calibrated heading direction can be determined based on a combination of the gyro-based heading direction and the position-based heading direction.
Abstract:
A method for planning and optimizing a path of a machinery moving in an area, comprises the steps of: • taking coordinates of an area-contour, an operating width of the moving machinery, a distance between the area-contour and a perimetric path within the area-contour as parameters, • eroding (mathematical morphological operation) the area by the distance to an interior of the area, thereby obtaining a smaller area delineated by a contour, • selecting a lane orientation within the eroded area contour, and partitioning the eroded area into adjacent interior lanes, • intersecting the interior lanes with the eroded area contour, thereby generating a lane grid and a corresponding connected undirected transition graph, • performing a mathematical algorithm for determining an optimized sequence of position coordinates on the lane grid, wherein a complete area covering path is generated. This method enables a cost-efficient optimized path of machinery through agricultural fields.
Abstract:
An unmanned pruning vehicle includes a pruning device configured to prune plant material from a plant. The unmanned pruning vehicle also includes a processing circuit is configured to control operation of the pruning device to prune a plant.