Driverless Cargo Receptacle Positioning by Inertial Vehicle Acceleration
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Solution Overview
Problem
Existing methods for positioning cargo on driverless transport vehicles require additional positioning elements, which complicates precise placement and can lead to inaccuracies, especially during braking, acceleration, and curve travel.
Innovation Solution
A method where a detection device connected to the vehicle controller detects the actual cargo position and determines a correction vector to a target position, using vehicle acceleration to move the cargo into place through inertia, without additional positioning elements, by controlling the vehicle's drive to overcome friction and achieve precise positioning on the cargo receptacle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If additional positioning elements (tools, robots, shape-fit elements, active/passive elements) are used to position cargo on the cargo receptacle, then positioning precision can be improved, but device complexity increases
Solution Approach 1:
The transport vehicle itself performs the positioning function by using its drive system to generate inertial forces that move the cargo to the target position. The vehicle controller detects the actual cargo position and controls the drive to accelerate in the direction opposite to the cargo position correction vector, making the system self-sufficient without external positioning tools or additional elements on the vehicle.
Solution Approach 2:
The system changes the friction parameter of the cargo receptacle surface dynamically. Before vehicle acceleration for cargo repositioning, the friction value is reduced to allow the cargo to slide more easily. During normal travel, the friction is maintained at higher levels to keep the cargo securely in place. This parameter change enables precise positioning without mechanical positioning elements.
2Device complexity
If vehicle acceleration is used to move cargo into target position through inertia, then additional positioning elements can be eliminated, but cargo may deviate from travel route
Solution Approach 1:
The system continuously detects the actual cargo position using a detection device connected to the vehicle controller. Based on this feedback, the controller determines the cargo position correction vector and controls the vehicle acceleration accordingly. After cargo repositioning, the system can determine a relative vehicle position correction vector to return the vehicle to its target trajectory, ensuring both cargo positioning and travel route accuracy are maintained through continuous feedback control.
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
Enables precise positioning of cargo on the cargo receptacle without additional elements, ensuring the cargo remains securely on the receptacle and deviates minimally from its travel route, with omni-directional drive capabilities allowing sudden accelerations in all directions for accurate placement.
Implementation Method 1
the cargo reaches the target cargo position on the cargo receptacle... by means of targeted one-time or multiple vehicle acceleration counter to the displacement direction from the actual position to the target position, the cargo slides into the target position on the cargo receptacle, after overcoming the friction force by means of the inertia force that is in effect
Implementation Method 2
after overcoming the friction force by means of the inertia force that is in effect... the friction value of the surface of the cargo receptacle is changed... the friction value is reduced, so that the cargo can slide into the target position more easily
Data Source
AI summary
In a method for changing the position of cargo located on a cargo receptacle of a driverless transport vehicle, the drive of the transport vehicle is controlled by a vehicle controller. The actual position of the cargo is detected by a detection device connected to the controller, and a cargo position correction vector to a cargo target position on the cargo receptacle is determined by the vehicle controller from the actual position of the cargo, and the vehicle controller controls the drive such that the transport vehicle is substantially accelerated in the opposite direction to the cargo position correction vector so that the cargo reaches the cargo target position on the cargo receptacle.