Straddle Carrier Sensor Positioning for Narrow Container Spacing
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Solution Overview
Problem
Current gantry lift stacker technologies face challenges in efficiently positioning containers to achieve high transport throughput, particularly in aligning containers for simultaneous picking up and precise spacing, which affects handling efficiency and storage optimization.
Innovation Solution
The method involves using sensors to determine the position of a rear wall of an already set-down container, allowing the gantry lift stacker to position a new container flush with the longitudinal direction of the existing one, enabling precise and automatic or semi-automatic positioning for simultaneous pick-up of two containers, with sensors on the gantry lift stacker detecting the rear wall and guiding the positioning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional positioning methods are used, then the gantry lift stacker can operate with simpler equipment, but the transport throughput and handling efficiency are reduced due to imprecise container positioning and spacing
Solution Approach 1:
The sensor determines the position of the rear wall of the already set-down container before the new container is positioned. This preliminary detection allows the system to calculate the exact positioning required for the new container to achieve uniform spacing, thereby improving transport throughput without requiring complex real-time adjustment mechanisms during the positioning process.
Solution Approach 2:
The patent replaces conventional mechanical positioning methods with an optical sensing system. The sensor detects the rear wall position of existing containers, and the controller automatically calculates and executes the precise positioning of new containers, substituting manual or mechanical measurement and adjustment with automated optical detection and control.
2Manufacturing precision
If precise positioning is achieved through manual operation, then positioning accuracy can be maintained, but driver pressure increases during complex maneuvers and handling efficiency is reduced
Solution Approach 1:
The positioning system performs self-service by automatically detecting the rear wall position of existing containers through the sensor and autonomously calculating the optimal positioning for new containers. The controller executes the positioning without requiring manual intervention, thereby maintaining high positioning precision while relieving the driver of complex maneuvering tasks.
Solution Approach 2:
The sensor continuously detects the position of the rear wall of already set-down containers and provides feedback to the controller. The controller uses this feedback information to automatically adjust and execute the precise positioning of new containers, creating a closed-loop control system that ensures positioning accuracy without increasing driver workload.
3Productivity
If containers are positioned with larger spacing to ensure alignment, then positioning errors are tolerated, but storage space is wasted and transport throughput is reduced
Solution Approach 1:
The sensor determines the exact position of the rear wall of the already set-down container before positioning the new container. This preliminary detection enables the system to calculate the precise minimum spacing required for proper alignment, eliminating the need for excessive spacing buffers and optimizing storage space utilization while maintaining high handling efficiency.
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
This approach enhances transport throughput by ensuring precise positioning, allowing for uniform and narrow container spacing, reducing storage needs, and providing flexibility between manual and automatic operation, thus improving handling efficiency and relieving driver pressure during complex maneuvers.
Implementation Method 1
measurement signals from sensors disposed on the gantry lift stacker are processed by the controller for the purpose of moving and positioning the gantry lift stacker and the container to be set down
Data Source
AI summary
A method for positioning a straddle carrier for containers and a container to be placed behind a container that has already been placed. The straddle carrier is moved by means of travel supports, travel drives, and a controller that interacts with same, and measurement signals from sensors arranged on the straddle carrier are processed by the controller in order to move and position the straddle carrier and the container to be placed.