Work Vehicle Obstacle Detection With Direction-Selective Collision Control
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Solution Overview
Problem
Existing obstacle detection systems for work vehicles, such as tractors, fail to efficiently confirm the functionality of sensors opposite to the travel direction, leading to potential collisions and reduced work efficiency due to unnecessary collision avoidance controls.
Innovation Solution
An obstacle detection system that includes front and rear obstacle sensors, a display unit, and a control unit to determine the travel direction and execute collision avoidance only when an obstacle is detected within the corresponding sensor range, while displaying obstacles outside the travel direction to inform the user without executing collision control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If obstacle detection is performed using sensors in the opposite direction to travel direction, then sensor functionality can be confirmed, but work efficiency is reduced due to unnecessary collision avoidance control
Solution Approach 1:
The system dynamically switches the active obstacle detection sensor based on the detected travel direction of the work vehicle. When forward travel is detected, the front obstacle sensor is activated; when backward travel is detected, the rear obstacle sensor is activated. This dynamic adaptation ensures that only the sensor corresponding to the current travel direction performs collision avoidance control, confirming sensor functionality while avoiding unnecessary control actions that would reduce work efficiency.
2Reliability
If collision avoidance control is executed for obstacles detected by sensors opposite to travel direction, then safety is improved, but work efficiency is reduced due to unnecessary control
Solution Approach 1:
The system applies different control qualities to different sensors based on their orientation relative to the travel direction. The obstacle detection unit selectively enables collision avoidance control only for the sensor (front or rear) that corresponds to the current travel direction, while disabling it for the opposite sensor. This localized application of control quality maintains safety for relevant obstacles while eliminating unnecessary control that would hinder work efficiency.
3Productivity
If only the sensor corresponding to travel direction is used for obstacle detection, then work efficiency is improved, but the user cannot confirm the functionality of the opposite sensor
Solution Approach 1:
The system provides feedback to the user through the display unit about the operational status of both obstacle sensors. While collision avoidance control is selectively applied only to the sensor corresponding to the travel direction, the display unit presents information indicating whether each sensor (front and rear) is properly functioning. This feedback mechanism allows the user to confirm the functionality of both sensors without compromising work efficiency through unnecessary control actions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures efficient operation by avoiding unnecessary collision avoidance controls and allowing users to confirm sensor functionality, thereby enhancing safety and productivity by accurately detecting and addressing obstacles within the travel path.
Implementation Method 1
a front obstacle sensor (front LIDAR sensor) that uses a laser beam to measure in three dimensions a distance to a measurement target on a front side of a work vehicle, a rear obstacle sensor (rear LIDAR sensor) that uses a laser beam to measure in three dimensions a distance to a measurement target on a rear side of a work vehicle
Data Source
AI summary
In this obstacle detection system, if an obstacle has been detected by a front obstacle sensor or a rear obstacle sensor which has an obstacle detection range corresponding to the travel direction of the work vehicle, then a control unit displays the detected position of the obstacle on a display unit and performs collision avoidance control corresponding to the detection position of the obstacle; further, if an obstacle has been detected by a front obstacle sensor or a rear obstacle sensor which has an obstacle detection range not corresponding to the travel direction of the work vehicle, then the control unit displays the detected position of the obstacle on the display unit without performing collision avoidance control corresponding to the detection position of the obstacle.