Power Supply Control Device Re-powering Safety Mechanism
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Solution Overview
Problem
Existing power supply control methods for re-powering devices do not ensure safe and secure operations, as they lack mechanisms to verify if the power supply is ready to be turned off before restarting, potentially leading to unintended power disruptions during updates or operations.
Innovation Solution
A power supply control device and method that outputs a re-power signal and an off-ready signal, where the re-power signal turns off and then turns on the power supply for a predetermined period, and the off-ready signal indicates readiness to turn off, with a power-off enable signal being held for that duration to ensure safe re-powering operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power supply is turned off without verification, then the re-power operation can be executed quickly, but the system may experience unintended power disruptions during updates or operations
Solution Approach 1:
The system performs preliminary verification by checking the off-ready signal before executing the power-off operation. The control unit verifies that the power supply is ready to be turned off by receiving and validating the off-ready signal from the power supply unit, ensuring that no updates or operations are in progress that would be disrupted by power interruption.
Solution Approach 2:
The power supply unit provides feedback through the off-ready signal to indicate its readiness for power-off. The control unit receives this feedback signal and uses it to determine whether to proceed with the re-power operation, creating a closed-loop control system that ensures safe power management.
2Reliability
If manual verification is required before re-powering, then power supply safety is improved, but user convenience and ease of operation deteriorates
Solution Approach 1:
The system performs self-verification by automatically checking the off-ready signal internally without requiring user intervention. The control unit autonomously verifies power supply readiness and executes the re-power operation without requiring the user to manually check system status, thereby maintaining safety while improving convenience.
Solution Approach 2:
The off-ready signal acts as an intermediary that automatically communicates the power supply's readiness status to the control unit. This intermediary mechanism eliminates the need for direct user verification while ensuring that power-off operations only occur when safe.
3Reliability
If the power supply is held off for a predetermined period, then the re-power operation is ensured to be complete, but the re-power time increases
Solution Approach 1:
The system performs preliminary checks before the power-off operation to ensure updates are complete. By verifying the off-ready signal in advance, the system ensures that no updates are in progress before cutting power, eliminating the need for extended waiting periods after power restoration.
Solution Approach 2:
The system dynamically adjusts the power-off duration based on the predetermined period required for update completion. By optimizing this time parameter, the system ensures sufficient time for updates to complete while minimizing unnecessary delays, achieving a balance between reliability and speed.
Data Source
AI summary
A power supply control device includes a first signal output unit that outputs a re-power signal and an off-ready signal, the re-power signal being a signal for turning off the power supply of an apparatus for a predetermined period of time and then turning on the power supply of the apparatus, the off-ready signal indicating that the power supply of the apparatus is ready to be turned off; a second signal output unit that outputs a power-off enable signal for turning off the power supply of the apparatus to a power supply unit when the re-power signal and the off-ready signal are supplied to the second signal output unit; and a holding unit that holds the power-off enable signal for the predetermined period of time.