Decentralized Conveyor Control Units with Asymmetric Bus Connections
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Solution Overview
Problem
Conveyor devices with complex structures and numerous zones require reliable and efficient communication between control units, but existing systems face issues with central control unit failures, high data transmission costs, and complex cabling efforts, making them costly and difficult to install and expand.
Innovation Solution
A conveyor device design featuring control units with cross-sectional recesses and asymmetrical cable geometries for reverse-polarity protected connections, allowing for simple and reliable data bus line insertion and reducing the need for pre-assembled bus line sections, enabling efficient communication and easy expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a central control unit is used to control multiple conveyor zones, then the system structure is simplified, but the reliability decreases because the entire conveying device becomes non-functional in case of failure
Solution Approach 1:
The control system is segmented into multiple independent control units, each responsible for specific conveyor zones. This segmentation eliminates the single point of failure inherent in central control systems, as each control unit operates autonomously and can continue functioning independently if others fail.
Solution Approach 2:
The patent transitions from a vertical hierarchical control structure (central control unit overseeing multiple zones) to a horizontal peer-to-peer network structure where control units are connected via bus lines in a distributed architecture, adding a dimensional shift in system organization that enhances reliability.
2Reliability
If control information is repeated throughout the system to achieve higher reliability, then the reliability improves, but the data transmission capacity requirements and costs increase
Solution Approach 1:
Bus lines serve as intermediary communication channels connecting control units in a structured manner. The bus line architecture enables reliable point-to-point communication between adjacent control units without requiring redundant transmission paths, thus maintaining reliability while minimizing data transmission capacity requirements.
3Manufacturing precision
If pre-assembled bus line sections are used for connecting control units, then the installation precision is improved, but the device complexity and installation effort increase
Solution Approach 1:
The connection device incorporates self-aligning features including guide elements and asymmetric cable cross-sectional geometry that automatically ensure correct orientation and polarity during insertion. This self-service mechanism eliminates the need for complex pre-assembly procedures while maintaining high connection precision.
Solution Approach 2:
The cable cross-sectional geometry is designed asymmetrically to match the connection device geometry, ensuring that cables can only be inserted in the correct orientation. This asymmetric design provides built-in polarity protection and simplifies installation by eliminating the need for complex marking or orientation procedures.
Data Source
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AI summary
The invention relates to a conveying device, comprising several conveying zones, which each have a conveying drive for producing a conveying force on an object located in the conveying zone and a sensor for detecting an object in the conveying zone, a plurality of control units (10, 100), wherein each control unit (10, 100) is associated with at least one conveying zone and is coupled to the sensor of the conveying zone in a signal-transmitting manner in order to receive signals that signal the presence of an object in the conveying zone and is coupled to the conveying drive in a signal-transmitting manner in order to control the conveying drive, and a data bus line (2, 102, 202, 302), which connects the control units (10, 100) to each other. According to the invention, each control unit (10, 100) has a connecting device (31, 141) for a bus line (2, 102, 202, 302), and the connecting device (31, 141) comprises a cross-sectional opening (33, 33a, 33b), in the region of which a first and a second electrical contact pin (34a, 34b) are arranged in order to penetrate the insulating sheathing of a cable line, which has a cross-sectional cable geometry that defines the orientation of the data bus line (2) in the cross-sectional opening (33).