Resistive Vent Sensor Circuit for Laptop Liquid Damage Mitigation
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Solution Overview
Problem
Information handling systems face significant damage risk from liquid spills, with users often unaware of the optimal methods to prevent catastrophic events when liquids come into contact with computing components.
Innovation Solution
An information handling system equipped with a resistive sense circuit proximate to a venting system detects voltage changes to determine liquid contact, triggering a computer-implemented response to mitigate damage, including power state management and user notifications to either manually or automatically power down the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system continuously monitors voltage across the resistive sense circuit to detect liquid contact, then the reliability of damage mitigation is improved, but the energy consumption increases due to continuous monitoring and processing
Solution Approach 1:
The system performs periodic voltage comparisons at specific sampling times (first time and second time) rather than continuous monitoring. The processor compares the first voltage at a first time, then compares the second voltage at a second time, creating a periodic detection rhythm that reduces energy consumption while maintaining adequate monitoring coverage for liquid spill detection
Solution Approach 2:
The system establishes voltage thresholds and monitoring parameters in advance before liquid contact occurs. The resistive sense circuit is pre-configured with the venting system, and the processor has predetermined voltage comparison criteria ready, enabling rapid response when liquid is detected without requiring complex real-time decision-making that would consume additional energy
2Object-affected harmful factors
If the system automatically powers down upon liquid detection, then the protection of computing components is improved, but the loss of operational capability worsens
Solution Approach 1:
The system applies preliminary protective action by automatically transitioning to a powered-down power state when liquid contact is detected through voltage threshold comparison. This pre-emptive shutdown occurs before significant damage can occur to computing components, effectively counteracting the harmful liquid exposure by removing electrical power that would otherwise enable electrochemical corrosion and short circuits
Solution Approach 2:
The system dynamically adjusts its operational state based on environmental conditions. When voltage measurements indicate liquid contact, the system transitions from an operational powered-on state to a protective powered-down state. This dynamic state change allows the system to maintain productivity during normal operation while automatically prioritizing component protection when liquid exposure is detected
3Ease of operation
If the system provides user-selectable options for power state management, then the ease of operation is improved, but the response time to mitigate damage worsens due to user decision delay
Solution Approach 1:
The system implements dynamic response modes that adapt to user preferences and situation severity. Users can configure the system to provide selectable options for power state management, allowing them to balance control versus speed according to their needs. The system can operate in a more gradual mode where users review options, or switch to faster automatic responses when liquid contact is detected, dynamically adjusting the interaction model based on the detected threat level and user configuration
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
The solution effectively minimizes damage from liquid exposure by promptly powering down the system, preventing further harm to computing components and allowing for controlled recovery when the liquid is detected, thus protecting the hardware.
Implementation Method 1
detecting, across a resistive sense circuit proximate to a venting system of an information handling system (IHS), a first voltage at a first time, wherein the first voltage includes a state-steady voltage and a nominal voltage
Data Source
AI summary
Methods, systems, and computer programs encoded on computer storage medium, for detecting, across a resistive sense circuit proximate to a venting system of an IHS, a first voltage at a first time, wherein the first voltage includes a state-steady voltage and a nominal voltage; comparing the first voltage to a voltage threshold, and determining that the first voltage is less than or equal to the voltage threshold and in response, maintaining a power state of the IHS; detecting, across the resistive sense circuit, a second voltage at a second time after the first time, wherein the second voltage includes the steady-state voltage and a low-voltage; comparing the second voltage to the voltage threshold, and determining that the second voltage is greater than the threshold voltage, and in response preparing a computer-implemented response to mitigate damage to the IHS from liquid contacting one or more computing components of the IHS.