Socket Detection Apparatus for Earth Wire Anomaly
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Solution Overview
Problem
Current power socket detection systems fail to detect critical anomalies such as a socket with only a live wire and lacking neutral and earth wires, or neutral and earth wires connected to each other's positions, posing safety hazards.
Innovation Solution
A socket detection apparatus with a micro-control unit, test plug, and induction antenna, along with test sub-circuits for each wire, uses MOS transistor switches and indicator lights to automatically detect these anomalies by sampling voltage and current values, and determining the correct or incorrect connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional power socket detection methods are used, then detection of normal wiring and basic anomalies is possible, but detection of critical anomalies (socket with only live wire, or neutral and earth wires swapped) fails
Solution Approach 1:
The detection function is divided into three independent test sub-circuits (live wire test, neutral wire test, earth wire test), each responsible for detecting a specific wire connection status. This segmentation allows each sub-circuit to independently evaluate its corresponding wire, enabling detection of critical anomalies that conventional unified detection methods miss.
Solution Approach 2:
An induction antenna is introduced as an intermediary component to detect the voltage state of the live wire without direct electrical contact. The antenna picks up electromagnetic signals from the live wire and transmits them to the micro-control unit, enabling safe and accurate detection of live wire presence even when other wires are missing or swapped.
2Device complexity
If the detection circuit is simplified to detect only basic states, then device complexity is reduced, but the ability to detect critical anomalies (neutral and earth wire swap, missing wires) is lost
Solution Approach 1:
The detection circuit is segmented into three independent test sub-circuits, each with its own indicator light. This modular structure maintains manageable complexity while significantly improving detection capability. Each sub-circuit can be independently analyzed and maintained, and the segmented design allows the system to detect all wire connection states including critical anomalies.
Solution Approach 2:
Different colored indicator lights are used to represent different detection states (green for normal, red for anomaly, yellow for specific anomaly types). This visual coding system provides intuitive feedback about the socket's wiring status, making it easy for users to understand detection results without complex displays or interfaces.
3Ease of operation
If conventional detection methods are used, then the device is simple to operate, but it provides false sense of security by failing to detect hazardous states
Solution Approach 1:
The detection results are segmented into distinct visual indicators for different wire states. Users simply need to observe the indicator lights to understand the socket's safety status, maintaining ease of operation. The segmented feedback system clearly distinguishes between normal and hazardous states, eliminating false security while keeping the interface simple.
Solution Approach 2:
The use of color-coded indicator lights (green for safe, red for dangerous) provides immediate, intuitive safety information without requiring user interpretation or technical knowledge. This visual safety signaling system maintains operational simplicity while effectively communicating hazard levels to users.
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 apparatus effectively detects the previously undetectable states, ensuring personal safety by identifying if a power socket is in a hazardous condition, and is applicable to both 220V/50 Hz and 110V power systems.
Implementation Method 1
an induction antenna arranged corresponding to a fire wire end of a detected power socket, the induction antenna being connected with a first signal input end of the micro-control unit
Data Source
AI summary
A socket detection apparatus for supporting anomaly detection of an earth wire and a neutral wire includes: a micro-control unit, provided with a test plug of a fire wire connection end, a neutral wire connection end and an earth wire connection end, and a detection circuit connected with the test plug; and an induction antenna arranged corresponding to a fire wire end of a detected power socket, the induction antenna being connected with a first signal input end of the micro-control unit.