PoE Power Source Controller Cable Detection Mechanism
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Solution Overview
Problem
Conventional power source devices with Power over Ethernet (PoE) continue to consume power by transmitting handshake signals even when a power device is not coupled, failing to meet current energy efficiency regulations.
Innovation Solution
A power source device with a controller and trigger unit that activates only when a connection cable is coupled, generating a handshake signal to communicate with the power device and deactivating when uncoupled to reduce power consumption, meeting energy efficiency standards by implementing a physical detection mechanism using mechanical structures or alternative detection units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the controller continuously transmits handshake signals to detect the power device, then the power source equipment can maintain communication readiness, but power consumption increases and energy efficiency regulations cannot be met
Solution Approach 1:
The controller transmits handshake signals periodically rather than continuously. The controller is configured to transmit the handshake signal at predetermined intervals through the connection cable to detect whether the power device is coupled, thereby reducing power consumption while maintaining communication readiness.
Solution Approach 2:
The system dynamically adjusts its operation mode based on detection results. When a power device is detected, the controller maintains active communication; when no device is detected after periodic attempts, the controller enters a low-power state, transitioning between active and dormant modes to optimize energy usage.
2Use of energy by moving object
If the controller is deactivated when no power device is coupled, then power consumption is reduced, but the system cannot detect when a device is connected
Solution Approach 1:
The system performs preliminary detection actions at startup and at predetermined intervals to check for device connection before entering or remaining in low-power mode. This ensures the controller is ready to detect when a power device is coupled while minimizing unnecessary continuous operation.
Solution Approach 2:
The system uses feedback from periodic handshake signal transmissions to determine whether to remain active or enter low-power mode. The detection results feed back into the control logic, which adjusts the controller's operational state accordingly, ensuring reliable device detection while optimizing power consumption.
Data Source
AI summary
A power source device coupled to a power device includes an output port and a controller. When the output port is coupled to a connection cable, the controller is activated to generate a handshake signal, so as to communicate with the power device. When it is determined that the power device is able to be powered according to the handshake signal, the controller controls the power supply device to power the power device through the connection cable. When the connection cable is not coupled to the output port, the controller is deactivated and thus the handshake signal is not generated.