Greenhouse Sprayer Rail Switching With Lateral Auto-Alignment
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Solution Overview
Problem
Conventional autonomous mobile sprayer apparatuses in greenhouses require worker intervention for rail switching movements, limiting their operational autonomy and efficiency, especially in large greenhouses with numerous rails.
Innovation Solution
An autonomous driving-based unmanned sprayer apparatus equipped with a controller that enables the vehicle body to switch and move between rails without human intervention, using a combination of sensors and mecanum wheels for precise lateral movement and alignment with the rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional autonomous sprayer apparatus is used, then autonomous forward/rearward movement on rail is achieved, but worker intervention is still required for rail switching movement
Solution Approach 1:
The unmanned sprayer apparatus performs rail switching autonomously by detecting rail positions using sensors (ultrasonic, infrared, or vision sensors) and automatically controlling lateral movement of the vehicle body. The system serves itself by eliminating the need for worker intervention in rail switching operations, with the controller autonomously coordinating sensor data and actuator commands to complete the switching process
Solution Approach 2:
The patent replaces manual mechanical rail switching with an automated sensor-actuator system. Sensors detect rail positions and the controller processes this information to command lateral movement actuators, substituting human-operated mechanical switching with an automated electromechanical system that achieves the same functional outcome without worker intervention
2Ease of operation
If manual rail switching is performed, then rail switching can be completed, but time is lost and labor is required
Solution Approach 1:
The autonomous rail switching system enables continuous operation by eliminating idle time associated with manual switching. The sensor-based detection and automated actuator control allow the sprayer to transition between rails without interruption to the spraying workflow, maintaining continuous useful action throughout the operation
Solution Approach 2:
The system performs preliminary detection of rail positions using sensors before executing the lateral movement for switching. This preliminary action of detecting and planning the switching path in advance allows for smooth, pre-coordinated transitions that minimize time loss during actual rail switching execution
3Extent of automation
If autonomous rail switching is implemented, then complete automation is achieved, but system complexity increases
Solution Approach 1:
The sensor system is designed with multi-functionality, using the same sensors (ultrasonic, infrared, or vision sensors) for both forward/rearward movement navigation and lateral rail switching detection. This universal sensor platform reduces overall system complexity by avoiding dedicated sensors for each function while achieving complete automation
Solution Approach 2:
The patent merges the control functions for forward/rearward movement and lateral rail switching into a single integrated controller system. By combining these control functions and using shared sensor resources, the system achieves complete automation while managing complexity through functional integration rather than separate independent systems
Data Source
AI summary
The unmanned sprayer apparatus according to the present invention includes a vehicle body of the unmanned sprayer apparatus that moves automatically in a greenhouse including a first rail and a second rail installed on flat land, and a controller configured to control the vehicle body to be switched and moved between the first rail and the second rail while the vehicle body travels on the flat land. The controller is configured to travel the vehicle body rearward on the first rail and when a front end of the first rail is detected, stop the vehicle body, to move the vehicle body laterally toward the second rail and when a front end of the second rail is detected, stop the vehicle body, and to align the vehicle body in a direction of the second rail and then dock the vehicle body to the second rail.