Sectorized Aircraft Freight Loading System with Local Control
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Solution Overview
Problem
Existing freight loading systems face challenges in scalability and cost-effectiveness due to the need for numerous input/output ports in central control units and the expense of implementing bus interfaces in all components, limiting expansion and increasing costs.
Innovation Solution
A scalable freight loading system is designed with a divided loading surface into sectors, each with a local control unit connected to I/O ports, and these local units communicate via a bus system to a central control unit, reducing the number of required ports and enabling easy expansion while using a CAN bus for efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all components are connected via serial interfaces to the central control unit, then each component can be individually controlled, but the number of I/O ports required increases significantly
Solution Approach 1:
The system divides the loading surface into multiple sectors, with each sector managed by a dedicated local control unit (SCB). This segmentation allows the central control unit to communicate with multiple sectors through a single bus interface rather than requiring individual serial connections to each component, thereby reducing the total number of I/O ports while maintaining individual component control capability.
2Device complexity
If all components are connected via a data bus to the central control unit, then the number of I/O ports is reduced, but simple components become more expensive due to required bus interfaces
Solution Approach 1:
The system introduces intermediate local control units (SCBs) that aggregate multiple simple components (drive means, sensors, locking bars) within each sector. These SCBs connect to the central control unit via bus interfaces, while simple components connect to their local SCB using cost-effective serial interfaces. This hierarchical segmentation reduces the number of expensive bus interfaces needed while maintaining individual component controllability.
Solution Approach 2:
Local control units (SCBs) serve as intermediary devices between the central control unit and simple components within each sector. The SCBs provide bus interfaces to the central control unit while offering serial interfaces to simple components, thereby mediating the communication requirements and reducing overall system cost by concentrating expensive interfaces at the intermediate level rather than at every component.
3Adaptability or versatility
If the loading surface is divided into sectors with local control units, then scalability is improved, but the system structure becomes more complex
Solution Approach 1:
The loading surface is divided into multiple independent sectors, each with its own local control unit (SCB). This segmentation enables scalable system design where sectors can be added or removed based on requirements. The standardized sector architecture with uniform communication protocols simplifies the overall system structure despite the increased scalability, as each sector follows the same template.
Solution Approach 2:
Each local control unit (SCB) is designed as a universal module capable of managing the same set of components (drive means, covering sensors, locking bars, proximity switches) in any sector. This universality allows the system to scale by simply adding more identical SCB modules rather than designing custom control logic for each sector, thereby improving scalability while keeping the system structure manageable through standardization.
Data Source
AI summary
The invention relates to a scalable freight loading system, especially for an aircraft, said system comprising drive means (L1-L9, R1-R9), covering sensors, bolts, proximity switches (PL1-PL9, PR1-PR9), and a central control device (CCB). According to the invention, the loading surface is divided into sectors (S1, S2, S3); a local control unit (SCB1, SCB2, SCB3) is associated with each sector; the drive means, covering sensors, and proximity switches of a sector are connected to IO ports of the local control unit; and the local control units are connected to the central control unit by means of a bus system (CAN-Bus).