Daisy-Chained P2P Sensor Access Circuit for Conflict-Free Communication
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Solution Overview
Problem
Current daisy chain network topologies for industrial automation systems face challenges in efficiently communicating between multiple point-to-point sensors, as they compete for a shared communication channel, leading to potential interruptions and reduced efficiency.
Innovation Solution
The implementation of accessing circuitry with flip-flop and switching circuitry that coordinates access to a shared communication channel using a selection clock signal, allowing multiple point-to-point sensors to be daisy chained without interference, enabling efficient communication between sensors and a master controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple point-to-point sensors are connected to a shared communication channel, then the system can support more sensors, but communication interruptions and interference increase
Solution Approach 1:
The patent divides the shared communication channel access into discrete time slots using a time-division multiplexing scheme. Each sensor is assigned specific time windows during which it can transmit data, preventing simultaneous access conflicts. This segmentation of communication resources allows multiple sensors to share the channel without interference, resolving the contradiction between supporting more sensors and maintaining communication reliability.
2Device complexity
If sensors compete for a shared communication channel, then system complexity is reduced, but communication efficiency decreases
Solution Approach 1:
The patent implements periodic time-division multiplexing where sensors transmit data in alternating time slots according to a predetermined schedule. This periodic structure provides organized, conflict-free communication without requiring complex arbitration protocols. The systematic allocation of time windows maintains relatively simple system architecture while significantly improving communication efficiency compared to competitive access methods.
3Ease of manufacture
If daisy chaining is implemented without coordination, then deployment cost is reduced, but communication interruptions increase
Solution Approach 1:
The patent establishes predetermined time allocation schemes and communication schedules before the sensors begin operation. Each sensor is pre-configured with its assigned time windows and transmission protocols. This preliminary coordination eliminates the need for complex real-time arbitration hardware while ensuring reliable, interruption-free communication. The upfront configuration enables simple daisy-chaining deployment without sacrificing communication continuity.
Data Source
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AI summary
Embodiments of this present disclosure may include an industrial control system that uses a daisy chain communication network to couple point-to-point sensors (P2P sensors) for communication of data between respective P2P sensors and a controller. Each P2P sensor may couple to the daisy chain communication network via accessing circuitry. The accessing circuitry may include switching circuitry and flip-flop circuitry to control when each P2P sensors may communicate with the controller via the daisy chain communication network.