This technology is a leveling device where a blade is attached to the front of a mobile main body, and a controller adjusts the blade height by operating a drive unit based on height information provided by position sensors on the blade. The blade is also equipped with an attitude sensor to detect its tilt.
On construction sites, equipment like bulldozers and wheel loaders are used to level ground before or during construction. However, results vary significantly based on operator skill, creating a reliance on experienced workers. Additionally, when a blade tilts along its width axis, its height changes in an arc, making it difficult to determine the actual height of the blade's bottom using only sensor data.
This technology calculates the vertical distance between the position sensor and the bottom of the blade by accounting for the pitch angle, controlling the drive unit so that the sensor height minus this distance equals the target work surface height. It independently adjusts left and right heights using position sensors, incorporates chassis tilt via an attitude sensor, and uses pitch, yaw, and roll actuators to move the blade across three axes, with GPS for site entry. It can be used for site grading, roadbed leveling, and factory floor foundation work, allowing even inexperienced operators to achieve precise grading regardless of blade angle changes.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of a rough-terrain driving system capable of independent driving and attitude control.
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