Duplex Switching Device Fixing Failure Detection
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Solution Overview
Problem
Existing duplex systems fail to detect fixing failures in switching devices, leading to difficulties in normal switching operations and potential system shutdowns when abnormalities occur in service-side current output devices.
Innovation Solution
A duplex control device with a first and second duplex controller and a switching device that includes feedback paths with transmitters and receivers to generate and detect feedback data, allowing for the detection of fixing failures and enabling the switching device to maintain operation even if a fixing failure occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a duplex system uses a switching device to switch between service side and stand-by side, then reliability is improved through automatic failover, but the system cannot detect fixing failures in the switching device itself, leading to potential system shutdowns
Solution Approach 1:
The patent implements feedback mechanisms where each controller monitors the switching device's output signals and feeds this information back to detect fixing failures. The controllers exchange status information about the switching device's state, enabling continuous monitoring and detection of failures without requiring additional external monitoring equipment.
Solution Approach 2:
The patent introduces feedback signals as intermediary elements that mediate between the switching device and the controllers. These feedback signals carry information about the switching device's state, allowing the controllers to indirectly monitor and detect fixing failures in the switching device through the transmitted status information.
2Device complexity
If the switching device operates without fixing failure detection, then device complexity is reduced, but normal switching operations cannot be maintained when abnormalities occur
Solution Approach 1:
The controllers use feedback signals from the switching device to monitor its operational state. When a fixing failure is detected through this feedback mechanism, the controllers can identify the abnormality and maintain proper switching operations by adjusting their control signals accordingly, ensuring continuous system operation despite the failure.
3Measurement precision
If fixing failure detection is added to the switching device, then measurement precision of failure detection is improved, but device complexity increases due to additional transmitters and receivers
Solution Approach 1:
The patent makes the controllers multi-functional by having them perform both control functions and monitoring functions. The same controllers that manage the switching operations also detect fixing failures through feedback signals, eliminating the need for separate dedicated monitoring equipment and reducing overall system complexity while maintaining detection precision.
Solution Approach 2:
The switching device monitors its own state through feedback signals that it generates and transmits to the controllers. This self-monitoring capability allows the system to detect fixing failures without requiring external monitoring equipment, reducing device complexity while maintaining the ability to precisely detect failures.
Data Source
AI summary
A duplex control device includes: two systems of duplex controllers and a switching device. The switching device includes, in a feedback path of each system, a transmitter configured to generate feedback data including data for fixing failure detection and a receiving device configured to determine the presence or absence of a fixing failure based on the feedback data output from the transmitter.