Communication Line Control Unit for Overcurrent Protection
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Solution Overview
Problem
Conventional communication apparatuses, such as multifunction peripherals, face slow response times in circuit protection due to overcurrent detection and relay operation delays, leading to insufficient protection and difficulty in quickly resolving communication breakdowns caused by accidental mixing of commercial power with telephone lines.
Innovation Solution
A communication apparatus with a detection unit to monitor signal levels on the communication line, disconnecting it when excessive inputs are detected, and reconnecting after a predetermined time, allowing for automatic recovery and user notification of issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overcurrent detection and relay operation are used for circuit protection, then circuit protection is provided, but response time is slow
Solution Approach 1:
The patent replaces the mechanical relay system with an electronic switching mechanism. The line control unit directly controls the switching element (such as a transistor or solid-state switch) to open the circuit, eliminating the mechanical relay operation delay and achieving instantaneous response to overcurrent conditions.
Solution Approach 2:
The patent introduces a line control unit as an intermediary between the detection unit and the switching element. This control unit receives detection signals and rapidly actuates the switching element, providing a fast response mechanism that bridges the gap between detection and physical circuit opening.
2Reliability
If fuse or disconnect devices are used to maintain disconnection state, then excessive voltage or current is detected and line is disconnected, but user intervention is required and communication function cannot be restored
Solution Approach 1:
The patent implements automatic recovery functionality where the line control unit autonomously recloses the circuit after detecting that the abnormal condition has ceased. The system monitors the line condition continuously and automatically restores communication function without requiring user intervention, while still providing protection against recurring abnormalities.
Solution Approach 2:
The patent employs continuous feedback monitoring through the detection unit that watches line conditions. When the abnormal condition disappears, the feedback signal triggers the line control unit to reclose the circuit, creating an automatic closed-loop control system that adapts to changing line conditions and restores service automatically.
Data Source
AI summary
There is provided a method for capturing a line after an elapse of a predetermined time, in a case where the line has been disconnected caused by an occurrence of a specific event in which a heavy load signal is input to an input side connecting the line. The control method for controlling a communication apparatus configured to perform a data communication via a line, includes detecting a signal on the line, disconnecting the line based on a level of the detected signal, and capturing the line based on an elapse of a predetermined time after the line has been disconnected.