Instrumentation Control System Unreliable Data Reset
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Solution Overview
Problem
In instrumentation control systems with asynchronous data transfer between control devices, unreliable information persists in closed loops, making it difficult to reset and causing continuous transmission of unreliable data, especially when devices are distributed across a network.
Innovation Solution
Implementing a reset switch and reset instruction units in each control device to output and monitor unreliability reset instructions, stopping the input of unreliable information for a defined period, and including unreliable information monitors to detect and manage reset instructions, ensuring all devices can reset unreliable data independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If asynchronous data transfer is implemented between control devices, then data transmission flexibility and device independence are improved, but unreliable information persists in closed loops and becomes difficult to reset
Solution Approach 1:
The patent applies preliminary action by having control devices proactively add unreliability flags to data before transmission when abnormal transitions are detected. This preliminary marking ensures that downstream devices can identify and handle unreliable information appropriately, preventing its continuous circulation in closed loops without requiring complex real-time coordination.
2Ease of operation
If reset switches are provided for each control device, then independent reset capability is improved, but coordination of reset timing becomes difficult in asynchronous systems
Solution Approach 1:
The patent implements feedback by having control devices monitor the presence of unreliability flags in received data and automatically adjust their operations accordingly. When unreliable information is detected, devices can trigger reset sequences or alternative processing paths, creating a self-regulating system that doesn't require external coordination for timing synchronization.
3Duration of action of stationary object
If unreliable information is continuously transmitted in closed loops, then device operation continuity is maintained, but data reliability deteriorates
Solution Approach 1:
The patent extracts unreliable information from the data stream by adding distinctive unreliability flags to marked data packets. This extraction allows the system to identify and isolate problematic information without disrupting the overall data flow and continuous operation of control devices. Downstream devices can then handle flagged data appropriately while maintaining system continuity.
Data Source
AI summary
In an instrumentation control system in which plural control devices are connected to each other through a network, and transfer of data is performed asynchronously, a reset switch is provided in one of a control device, and when this switch is depressed, an instruction to reset unreliable information in the respective control devices is transmitted to other control devices, the control device having transmitted the instruction and all the other control devices having received the instruction stop the reception of the unreliable information from the network for a definite period, the unreliable informations in the respective control devices are reset, and the unreliable informations in the whole network are reset.