Multiplexed Sensor Signaling for Liquid-Cooling Leak Detection
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Solution Overview
Problem
Commercially available leak detectors and flow-rate sensors are not compatible with existing liquid-cooling systems for computer systems, and there is a need for sensors that can detect leaks and monitor fluid flow rates in these systems while being compatible with control systems and communication protocols.
Innovation Solution
The development of detectors and sensors that emit simulated signals, such as simulated fan-tachometer signals, to alert controllers of changes in system states, including leaks and flow rates, allowing for compatibility with existing control systems and communication protocols like IPMI, and enabling the issuance of commands to manage system operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If commercially available leak detectors and flow-rate sensors are used, then leak detection and flow rate monitoring functions are provided, but compatibility with existing liquid-cooling systems and control systems is poor
Solution Approach 1:
The sensor is designed to provide multiple functions including leak detection, flow rate monitoring, and temperature sensing, while maintaining compatibility with existing liquid-cooling systems and control protocols through simulated fan-tachometer signals and IPMI interface support
Solution Approach 2:
The patent uses simulated fan-tachometer signals as an intermediary communication method, allowing the sensor to interface with existing control systems that expect fan speed signals, thereby bridging the compatibility gap without requiring system-wide redesign
2Measurement precision
If commercially available flow-rate sensors are used, then flow rate detection is provided, but device size and cost are too large for widespread commercialization in liquid-cooling systems
Solution Approach 1:
The sensor integrates multiple sensing functions (flow rate, temperature, leak detection) into a single compact unit that can be nested within the liquid-cooling system's existing infrastructure, eliminating the need for separate sensor components
Solution Approach 2:
The patent combines leak detection, flow rate monitoring, and temperature sensing capabilities into a single integrated sensor assembly, reducing overall device complexity and enabling easier integration into liquid-cooling systems
3Adaptability or versatility
If simulated fan-tachometer signals are used for communication, then compatibility with existing control systems is improved, but communication protocol complexity increases
Solution Approach 1:
The sensor creates a copy of the familiar fan-tachometer signal format to communicate sensor data, allowing existing control systems to interpret the signals without modification while the sensor simultaneously supports modern IPMI protocols for enhanced functionality
Data Source
AI summary
An observed operational state can include an operational state of one or more system devices. A sensor can emit, in response to a detected observable condition reflective of a given operational state, a simulated signal reflective of a different operational state as a proxy for the detected condition. A controller receiving such a proxy signal can, at least partially responsively to the proxy signal, issue a command corresponding to the given operational state. For example, a leak detector can emit in response to a detected leak, or a flow-rate sensor can emit in response to a detected flow-rate of a liquid, a simulated fan-speed tachometer signal representative of a selected fan speed. At least partially in response to observing a simulated tachometer signal, a controller can issue a system command corresponding to an underlying system condition for which the simulated tachometer signal is a proxy.