Plug Cable Control Circuit for Abnormal Temperature Protection
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Solution Overview
Problem
Existing cable systems with plugs fail to promptly and reliably detect abnormal temperatures, leading to potential damage and requiring cumbersome fuse replacement, and existing temperature detection methods are inadequate for identifying heat issues outside the sensor's location.
Innovation Solution
A cable with a plug and integrated control circuit that includes a temperature sensor and switch, allowing for immediate power interruption when abnormal temperatures are detected, eliminating the need for fuse replacement and enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fuse is installed in the feed cable to prevent heat generation, then the electronic device can be protected from damage, but the fuse replacement becomes troublesome and the heat generation cannot be directly detected
Solution Approach 1:
The patent replaces the mechanical fuse system with an electronic control system comprising a temperature sensor, control circuit, and switch. The temperature sensor detects abnormal heat conditions, the control circuit processes this information, and the switch interrupts power supply electronically, eliminating the need for physical fuse replacement while maintaining protection functionality.
Solution Approach 2:
The patent introduces a control circuit as an intermediary between the temperature sensor and the power supply system. This control circuit receives temperature data, makes determination about abnormal conditions, and controls the switch operation, thereby enabling indirect detection and response to heat issues without direct mechanical intervention.
2Measurement precision
If a temperature sensor is installed in the middle of the feed cable to detect abnormal temperature, then the temperature can be measured, but the abnormal temperature at other locations cannot be detected promptly
Solution Approach 1:
The control circuit acts as an intelligent intermediary that not only receives temperature data from the sensor but also determines abnormal conditions based on this data. This intermediary processing enables the system to respond to temperature issues even when the sensor is located at a specific point, as the control logic can infer and respond to heat generation throughout the cable system.
3Device complexity
If no temperature detection system is used, then the device structure remains simple, but the abnormal temperature cannot be detected and power feeding continues causing damage
Solution Approach 1:
The patent replaces simple passive protection mechanisms with an active electronic monitoring system. The temperature sensor, control circuit, and switch work together to provide automated temperature monitoring and response, transforming the system from passive to active protection while maintaining reasonable structural complexity.
Solution Approach 2:
The patent implements a feedback loop where the temperature sensor continuously monitors temperature conditions, the control circuit processes this information, and the switch responds by interrupting power supply when abnormal conditions are detected. This closed-loop feedback system ensures reliable detection and response to temperature issues.
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
The solution enables prompt and reliable detection of abnormal temperatures, preventing damage to the cable and connected devices by automatically interrupting power supply, thus ensuring safer and more efficient operation.
Implementation Method 1
a temperature sensor mounted on the substrate and disposed in the vicinity of a power supply terminal of the plug or a grounding terminal of the plug
Implementation Method 2
the feed cable is liable to produce heat
Data Source
AI summary
A plug with a cable includes a plug and a cable. The plug is connected to a receptacle to which a secondary cell is connected. The plug includes a housing and a substrate therein. The cable includes a power supply line and a grounding line. The cable has one end connected to the plug and the other end connected to a power supply unit. A switch is mounted on the substrate and provided in series in a power supply interconnection connected to the power supply line. A temperature sensor is mounted on the substrate and disposed near a power supply terminal or a grounding terminal of the plug. A control circuit is mounted on the substrate and configured to interrupt the power supply interconnection by turning off the switch when a temperature detected by the temperature sensor exceeds a predetermined value.