Server Power Failure Monitoring via Counter-Phase Edge Detection
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Solution Overview
Problem
Existing power failure monitoring systems in servers are unable to accurately reflect abnormal power-on behaviors, leading to insufficient accuracy in power failure monitoring, particularly due to the oversight of a third type of power failure where the power supply turns on and off before reaching a preset counter value.
Innovation Solution
A power failure monitoring device and method that utilize a programmable logic device to send a power supply enable signal, start a counter, and analyze the power supply status indication signal, detecting falling edges to identify abnormal power supply status indications before the counter reaches its preset value, allowing for precise detection of power-on failures and generating corresponding logs for accurate monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing power failure monitoring methods are used, then the system can detect power-off failures, but it cannot accurately detect power-on failures where the power supply turns on and off before reaching preset counter value
Solution Approach 1:
The monitoring method segments power failure detection into distinct time periods: before counter reaches preset value (power-on phase) and after counter reaches preset value (normal operation phase). This segmentation allows different detection strategies to be applied to different failure modes, enabling accurate detection of both power-on failures and power-off failures without confusion between failure types.
Solution Approach 2:
The system performs preliminary action by starting the counter immediately when power supply is enabled and monitoring for the first falling edge before the counter reaches its preset value. This preliminary monitoring phase captures power-on failures that occur during the initialization period, preventing information loss about the actual power failure type.
2Productivity
If the counter reaches preset value before detecting failure, then normal operation is assumed, but actual power-on failures occurring before this point are missed
Solution Approach 1:
The system performs preliminary monitoring action during the counter-up phase, checking for power supply status changes before the counter reaches its preset value. This ensures that power-on failures occurring during initialization are captured before the system transitions to normal operation monitoring, maintaining both efficiency and accuracy.
Solution Approach 2:
The counter serves as an intermediary mechanism that structures the monitoring process into distinct phases. By using the counter's progression as a timing reference, the system can differentiate between power failures occurring during initialization versus those during normal operation, enabling accurate classification and detection of different failure types.
Data Source
AI summary
A power failure monitoring method applied to a programmable logic device includes outputting a power supply enable signal to instruct a power supply to power on, starting a counter, determining whether a first abnormal power status indication signal exists for each power supply before a current reading of the counter reaches a preset value, and in response that the first abnormal power status indication signal exists, outputting a first read notification signal according to the first abnormal power status indication signal, so that a baseboard management controller reads the first abnormal power supply status indication signal according to the first read notification signal and generates a corresponding power status log.