Storage Apparatus Shock Sensor Sensitivity Control
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Solution Overview
Problem
Conventional storage apparatuses face issues with erroneous shock sensor detections due to power supply fluctuations, leading to write faults and potential data destruction, as they struggle to differentiate between actual shocks and power supply-induced errors, affecting writing capability and data integrity.
Innovation Solution
A storage apparatus with a shock sensor system that includes a determining unit to differentiate between shock and power supply fluctuations, adjusting sensitivity accordingly, and a write disabling unit to manage write operations based on accurate detection, featuring multiple determining methods to validate shock sensor outputs and a sensitivity control unit to optimize detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shock sensor detection output is used to disable writing during shock, then data protection is improved, but erroneous detection due to power supply fluctuations causes write faults and deteriorates writing capability
Solution Approach 1:
The patent introduces a determining unit as an intermediary between the shock sensor and the write disabling unit. This determining unit analyzes multiple parameters (shock sensor output, head position signal, power supply voltage) to mediate whether writing should actually be disabled, thereby filtering out erroneous detections caused by power supply fluctuations while maintaining protection against real shocks
Solution Approach 2:
The patent changes the parameter of detection sensitivity dynamically. The sensitivity control unit adjusts the shock sensor's detection sensitivity based on the determination result - reducing sensitivity when power supply fluctuations are detected (to prevent erroneous write disablement) and maintaining high sensitivity when real shocks are detected (to ensure data protection)
2Measurement precision
If the shock sensor detection sensitivity is increased to improve shock detection accuracy, then data protection is improved, but false detection due to power supply fluctuations increases
Solution Approach 1:
The patent makes the detection sensitivity dynamic rather than fixed. The sensitivity control unit adjusts the shock sensor's sensitivity in real-time based on operating conditions, particularly power supply stability. This allows the system to maintain high detection accuracy when needed while reducing false alarms when power supply fluctuations occur
Solution Approach 2:
The patent implements feedback mechanisms where the determining unit continuously monitors multiple parameters including power supply voltage and head position, and uses this feedback to adjust the shock sensor's sensitivity through the sensitivity control unit, creating a closed-loop system that adapts to changing conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution prevents erroneous write disablements, ensures accurate data protection by differentiating between shock and power supply fluctuations, and enhances writing capability by optimizing shock sensor sensitivity, thereby reducing data destruction risks and improving access performance.
Implementation Method 1
as a shock sensor for use in a storage apparatus, a piezoelectric element is used for example
Data Source
AI summary
Upon obtaining a detection signal of a shock sensor that detects a shock applied to an apparatus for output, a write disabling unit disables writing by a head on a medium over a predetermined time corresponding to a shock convergence. A determining unit determines, during the write disable, whether an output of the shock sensor is a detection output of the shock sensor due to a shock or an erroneous detection output of the shock sensor due to power supply fluctuations. A sensitivity control unit increases a detection sensitivity of the shock sensor when the determining unit determines that the output is a detection output due to the shock, and decreases the detection sensitivity of the shock sensor and clears the write disable when the determining unit determines that the output is an erroneous detection output due to power supply fluctuations.