Server Fan Speed Control Using Optical Temperature Signals
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Solution Overview
Problem
Existing fan speed control systems in servers face issues such as complex signal routing, susceptibility to interference, and increased PCB routing space due to multiple temperature sensing points and a singular BMC location, leading to slower response speeds and design complexity.
Innovation Solution
Implementing a fan speed control system using optical signal transmission with temperature-to-optical signal conversion modules, light-converging modules, and a second temperature-to-optical signal conversion module to control fan speed without involving a BMC chip, reducing PCB routing and design complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple temperature monitoring units and I2C buses are used to monitor temperatures of crucial core components, then temperature monitoring coverage is improved, but signal routing complexity and PCB routing space increase
Solution Approach 1:
The patent replaces the electrical signal transmission system (I2C buses) with an optical signal transmission system. Temperature sensing units convert temperature signals into optical signals that travel through optical channels to the BMC, eliminating the need for complex electrical routing and reducing PCB routing space while maintaining comprehensive temperature monitoring coverage.
Solution Approach 2:
The patent introduces optical signals as an intermediary medium to transmit temperature data from multiple sensing points to the BMC. This intermediary approach allows parallel transmission of multiple temperature data streams through a single optical channel, simplifying the routing architecture while preserving complete temperature monitoring capability.
2Measurement precision
If multiple temperature sensing points and a singular BMC location are used, then temperature monitoring accuracy is improved, but the number of communication lines and PCB routing space increase
Solution Approach 1:
The patent merges multiple temperature data transmission channels into a single optical communication line. By consolidating multiple I2C buses into one optical signal transmission path, the system maintains accurate temperature monitoring from multiple sensing points while dramatically reducing the PCB routing space required for communication lines.
Solution Approach 2:
The patent transitions from two-dimensional electrical signal routing on the PCB to three-dimensional optical signal transmission through air or optical fibers. This dimensional change allows temperature data from multiple points to be transmitted simultaneously through a single channel without increasing PCB routing area.
3Measurement precision
If a large number of data points and varying data evaluation criteria are processed by BMC software, then temperature control accuracy is improved, but software complexity and response speed decrease
Solution Approach 1:
The patent segments the temperature data processing function by moving it from the BMC software to the optical signal transmission path itself. Temperature sensing units locally convert and prepare optical signals, reducing the data processing burden on BMC software and enabling faster response times while maintaining accurate temperature control through distributed processing.
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
Achieves high-accuracy fan speed control with reduced PCB routing and simplified BMC design, enabling rapid heat dissipation and avoiding high energy consumption and noise by utilizing optical signal transmission.
Implementation Method 1
The first temperature-to-optical signal conversion modules are configured to sense temperature values at preset positions within the server and convert the temperature values into first optical signals
Implementation Method 2
The light-converging modules are configured to reflect and converge the first optical signals to form second optical signals directed toward the second temperature-to-optical signal conversion module
Data Source
AI summary
Provided are a fan speed control system, method, and device based on optical signal transmission, and a medium. The system includes: first temperature-to-optical signal conversion modules, which are configured to sense temperature values at preset positions within a server and convert the temperature values into first optical signals; light-converging modules, which are configured to reflect and converge the first optical signals to form second optical signals directed toward the second temperature-to-optical signal conversion module; light-converging modules, which are correspondence with the first temperature-to-optical signal conversion modules; a second temperature-to-optical signal conversion module, which is disposed on one side where a fan is located within the server, and is configured to receive a plurality of second optical signals respectively corresponding to the plurality of preset positions within the server, and to control a rotational speed of the fan within the server based on the plurality of second optical signals.