Non-Contact Voltage Detector with Shutter-Opening Pins
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Solution Overview
Problem
Tamper-resistant receptacles pose a challenge for detecting AC voltage, as their design prevents access with single-pronged objects, making it difficult to determine if AC voltage is present without inserting a two-pronged plug.
Innovation Solution
A non-contact, hand-held voltage detector with a safety extension that includes a pair of pins to open both shutters of the tamper-resistant receptacle, allowing for voltage detection without inserting a plug, featuring a conductive contact and a tester circuit with a speaker or indicator light for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tamper-resistant receptacle uses spring-loaded shutters to prevent access with single-pronged objects, then safety against tampering is improved, but the ability to detect voltage with a standard voltage detector deteriorates
Solution Approach 1:
The patent introduces a special adapter as an intermediary device that bridges the gap between the tamper-resistant receptacle design and voltage detection needs. The adapter includes two conductive prongs that simultaneously engage both shutters, acting as a mediator that allows voltage detection while maintaining the receptacle's tamper-resistant functionality for regular plugs
Solution Approach 2:
The voltage detector is segmented into two separate functional components: the main detector body and the adapter with conductive prongs. This segmentation allows the detector to maintain its non-contact detection capabilities while the adapter handles the mechanical function of opening both shutters simultaneously, separating the detection function from the shutter-opening function
2Ease of operation
If a two-pronged plug is inserted to open both shutters for voltage detection, then voltage detection capability is improved, but the risk of electrical contact and safety hazards increases
Solution Approach 1:
The patent replaces the traditional mechanical contact-based voltage detection method with a non-contact detection system. The voltage detector uses electrical field sensing to detect the presence of voltage without requiring physical contact with conductive elements, thereby eliminating the risk of electrical contact while maintaining detection capability
Solution Approach 2:
The adapter serves as a safe intermediary that opens the shutters using insulated conductive prongs, allowing the shutters to open without requiring the user to directly contact live electrical components. The non-contact detector then completes the process by detecting voltage through field sensing rather than physical contact
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
Enables safe and efficient detection of AC voltage in tamper-resistant receptacles by opening the shutters, allowing users to determine the presence of voltage without risking electrical contact, enhancing safety and usability.
Implementation Method 1
The voltage detector includes a conductive contact and a tester circuit with a speaker or indicator light for detection
Data Source
AI summary
A non-contact, hand-held voltage detector is used to determine if AC voltage is present in a tamper-resistant receptacle. The voltage detector includes a pair of pins to open both shutters of the tamper-resistant receptacle.