Voltage Sensor for High-Current Junction Fire Risk Detection
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Solution Overview
Problem
High-current junctions in data center racks are susceptible to fire risks due to increased electrical resistance and heat dissipation, making conventional temperature sensors and infrared cameras economically infeasible for large-scale installation.
Innovation Solution
Incorporating voltage sensors at each high-current junction to detect voltages exceeding a threshold, which indirectly monitor temperature and trigger predetermined actions to prevent fires, replacing the need for expensive temperature sensors and infrared cameras.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature sensors or infrared cameras are installed to monitor high-current junctions, then fire risk detection capability is improved, but system cost and complexity increase significantly
Solution Approach 1:
The patent introduces voltage as an intermediary parameter to indirectly monitor temperature conditions. Instead of directly measuring temperature with complex sensors, the system measures voltage across the high-current junction, which changes in response to temperature-induced resistance changes. This intermediary measurement approach simplifies the monitoring system while maintaining fire risk detection capability.
Solution Approach 2:
The patent replaces thermal measurement systems (temperature sensors and infrared cameras) with an electrical measurement system (voltage sensor). By substituting the mechanical/thermal sensing approach with an electrical sensing approach, the system achieves comparable fire risk detection with significantly reduced complexity and cost.
2Measurement precision
If temperature sensors or infrared cameras are installed at each high-current junction, then monitoring precision is improved, but installation cost becomes economically infeasible
Solution Approach 1:
The patent employs inexpensive voltage sensors instead of expensive temperature sensors or infrared cameras. The voltage sensors are significantly cheaper components that can be deployed at each high-current junction without making the overall system economically infeasible, while still providing adequate monitoring precision through voltage-based temperature inference.
Solution Approach 2:
The patent changes the measurement parameter from temperature to voltage. By measuring voltage across the high-current junction and inferring temperature conditions from voltage changes (caused by resistance changes due to heating), the system achieves temperature monitoring precision with a different, more cost-effective parameter measurement approach.
3Device complexity
If voltage sensors are used to monitor high-current junctions, then system cost is reduced, but direct temperature measurement capability is lost
Solution Approach 1:
The patent uses voltage as an intermediary indicator that correlates with temperature conditions. Instead of directly measuring temperature, the system measures voltage across the high-current junction, where voltage changes reflect resistance changes caused by temperature variations. This intermediary approach maintains temperature monitoring capability while using simpler, cheaper voltage sensors.
Solution Approach 2:
The patent converts the harmful effect of increased electrical resistance (which causes both power loss and temperature rise) into a useful measurement signal. By measuring voltage across the junction, the system detects resistance changes that indicate heating, turning the resistance increase itself into a detectable signal for fire risk monitoring.
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 approach allows for cost-effective, large-scale monitoring of high-current junctions, effectively addressing fire risks by detecting the underlying cause of increased power dissipation and alerting users to take corrective action before a fire occurs.
Implementation Method 1
A voltage sensor is provided to detect a voltage across the high-current junction
Data Source
AI summary
A system includes a high-current junction, a voltage sensor, and a controller. Power connectors of two components are electrically connected at the high-current junction, where a high current passes between the two components at the high-current junction. The voltage sensor detects a voltage at the high-current junction. The controller performs a predetermined action in response to the voltage sensor detecting the voltage at the high-current junction being greater than a predetermined threshold voltage. The system may be a data center rack. The high-current junction may be the junction at which an alternating current (AC) input receives AC power from AC mains. The high-current junction may alternatively be the junction at which a power supply receives the AC power from the AC input to generate direct current (DC) power to provide to data center rack components insertable within the data center rack.