Simulated Tachometer Signals 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, lacking compatibility with control systems and communication protocols, making them unsuitable for widespread commercialization in computer system applications.
Innovation Solution
Development of detectors and sensors that emit simulated signals, such as simulated fan-tachometer signals, to alert controllers of leaks or flow rate changes, allowing compatibility with existing communication protocols and systems, including the use of IPMI buses, and integration with leak detector circuits that modify signal waveforms upon detecting leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If commercially available leak detectors and flow-rate sensors are used, then leak detection and flow monitoring functions are provided, but compatibility with existing liquid-cooling systems and control systems is lost
Solution Approach 1:
The patent creates simulated versions of standard signals (fan tachometer signals, PWM signals) that copy the appearance and characteristics of signals used by existing liquid-cooling components. The leak detector outputs a simulated fan tachometer signal that looks identical to a real fan's tachometer signal, and the flow rate sensor outputs a simulated PWM signal that mimics standard fan control signals. This allows existing control systems to interpret sensor data without requiring new protocols or interfaces.
Solution Approach 2:
The patent introduces signal conversion circuits that act as intermediaries between the sensor/detector outputs and the existing control system inputs. These circuits translate specialized sensor signals into universal formats that liquid-cooling controllers already understand, enabling compatibility without modifying either the sensors or the control systems.
2Measurement precision
If specialized leak detectors and flow-rate sensors are developed, then detection accuracy and functionality are improved, but device complexity and integration difficulty increase
Solution Approach 1:
The patent changes the output signal parameters of the sensors and detectors to match standard industry formats. The leak detector outputs signals with frequency and duty cycle characteristics matching fan tachometer signals, while the flow rate sensor outputs PWM signals with timing characteristics matching standard fan control protocols. This parameter standardization simplifies integration despite the specialized detection functions.
3Adaptability or versatility
If existing communication protocols are utilized, then system integration is simplified, but the ability to transmit detailed sensor data is reduced
Solution Approach 1:
The patent makes existing communication protocols serve multiple functions. The simulated fan tachometer signal not only indicates fan speed but also encodes leak detection status. The simulated PWM signal not only controls fan speed but also conveys flow rate information. This multi-functionality allows detailed sensor data to be transmitted through standard protocols without requiring new communication channels.
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.