Power Over Data Link Voltage Detection and Service Control
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Solution Overview
Problem
Existing power over data (PoD) technologies face challenges in enhancing the reliability and availability of network devices, particularly in aircraft and spacecraft environments, where flexible and efficient power management is crucial to support various service functions with different voltage levels without additional data communication or software changes.
Innovation Solution
A network system and method that utilize a power over data link to transmit power and data, featuring a data switch, a power splitter, a voltage comparator, and voltage converters, allowing selective activation/deactivation of service functions based on detected voltage levels, enabling efficient power management and operation mode switching using a single connection for data transmission and power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If PoD technology is used to supply power over data lines, then cable cost is reduced and remote power cycling is enabled, but the system lacks flexibility in adapting to different voltage levels and power sources
Solution Approach 1:
The patent implements automatic detection and adaptation to different voltage levels (28V, 42V, 115V) by monitoring voltage parameters and dynamically adjusting operating mode. This allows the system to work with different power sources without hardware changes, resolving the contradiction between simplified cabling and voltage adaptability
Solution Approach 2:
The system performs self-diagnosis and self-configuration by automatically detecting voltage levels and configuring appropriate operating modes without external intervention. This enables the system to adapt to different power sources autonomously, maintaining versatility while using simplified PoD cabling
2Device complexity
If a single PoD link is used for both data and power transmission, then device complexity is reduced, but the system lacks reliability when power sources fail or voltage levels change
Solution Approach 1:
The patent incorporates voltage comparison and detection mechanisms that proactively monitor power conditions before failures occur. By detecting voltage levels in advance and preparing appropriate response modes, the system prevents reliability issues rather than reacting to them, maintaining robustness with simplified connections
Solution Approach 2:
The system continuously monitors voltage levels through feedback mechanisms and automatically adjusts operating modes based on detected conditions. This closed-loop control ensures reliable operation across different power sources by constantly adapting to actual power conditions, compensating for the simplicity of single-link architecture
3Adaptability or versatility
If voltage levels are varied to improve flexibility, then power management capability is enhanced, but the system requires additional data communication and software changes
Solution Approach 1:
The patent replaces complex software-based power management with hardware-level voltage detection and automatic mode switching. By using electrical signal detection and hardwired response logic, the system achieves voltage adaptation without requiring additional data communication protocols or software changes, maintaining simplicity while gaining flexibility
4Reliability
If all service functions remain active, then service availability is maintained, but power consumption increases during backup power operation
Solution Approach 1:
The patent implements selective activation of service functions based on available power capacity. During backup power operation, non-essential functions are deactivated while critical functions remain active. This partial operation mode reduces power consumption to match available backup capacity while maintaining essential service availability, resolving the contradiction between full service operation and power conservation
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 solution simplifies power supply design, reduces power consumption, and ensures secure, reliable operation by selectively activating service functions based on voltage levels, facilitating seamless switching between normal and backup power modes without adapting individual service functions for different voltage levels.
Implementation Method 1
a power splitter configured to split the data signal of the power over data link from the power supply
Implementation Method 2
a voltage comparator coupled to the power splitter. The voltage comparator is configured to detect a voltage level of the power supply
Data Source
AI summary
A network includes a power over data link, a data switch coupled to a data bus and configured to transmit and/or receive data from and/or to the data bus via the power over data link, and a service device coupled to the data switch via the power over data link and configured to transmit and/or receive data from and/or to the data switch via the power over data link. The service device has a power splitter to split the data signal of the power over data link from the power supply, service functions coupled to the power splitter and configured to receive power from the power splitter, and a voltage comparator coupled to the power splitter. The voltage comparator is configured to detect voltage level of the power supply, and based on the detected voltage level, to selectively activate and/or deactivate one or more of the service functions.