EMI Detection Device Using Algorithmic Thresholding
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Solution Overview
Problem
Existing EMI detection systems are inadequate in detecting and differentiating various types of electromagnetic interference, particularly pulsed and ultra-wideband interference, and fail to provide effective indication of disruptive EMI levels, leading to potential equipment malfunction or damage in critical sectors like ICT and aviation.
Innovation Solution
A system comprising scalable antenna designs, such as broad band inverted spiral or centre-fed inverse log spiral, with flexible printed circuit boards, capable of detecting EMI across 30 MHz to 6 GHz, and a central terminal for remote control and data analysis, using visual and audible indicators, and a database-driven algorithm to set thresholds and reduce false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shielding and filtering are used on every piece of electrical/electronic equipment, then protection against EMI is improved, but cost and weight increase prohibitively
Solution Approach 1:
The patent replaces physical shielding and filtering mechanisms with an electromagnetic detection and indication system. Instead of mechanically enclosing equipment in conductive shields or adding filters to cables, the system uses detector devices with antennas to sense EMI fields and provides visual/audible alerts, allowing users to take evasive action without modifying the equipment itself.
Solution Approach 2:
The patent introduces detector devices as intermediary components between the EMI environment and the protected equipment. These detectors sense the electromagnetic field conditions and provide warning signals, acting as a mediator that enables protective action without direct physical protection of the equipment.
2Reliability
If shielding and filtering are used on every piece of electrical/electronic equipment, then protection against EMI is improved, but system weight increases considerably
Solution Approach 1:
The patent replaces heavy physical shielding structures with lightweight detector devices. The detection system uses small antennas and electronic circuitry to sense EMI fields, providing protection through information and alert mechanisms rather than physical barriers, thereby eliminating the weight penalty of traditional shielding.
Solution Approach 2:
The patent extracts the protection function from the equipment itself and places it in separate detector devices. Instead of adding weight to each piece of equipment with shields and filters, the detection capability is removed as a separate, portable device that can monitor the electromagnetic environment and alert users.
3Measurement precision
If traditional EMI detection systems are used, then detection capability is limited, but device complexity increases
Solution Approach 1:
The patent creates a universal detector device that can detect multiple types of EMI (narrowband, broadband, pulsed, continuous wave) across a wide frequency range using a single integrated system. The detector combines antenna, receiver, processor, and indication functions in one device, eliminating the need for multiple specialized detectors and reducing overall system complexity.
Solution Approach 2:
The patent merges detection, processing, and indication functions into an integrated detector device. The antenna receives EMI signals, the receiver processes them, the processor analyzes characteristics and compares against thresholds, and the indicator provides alerts - all in one unified system rather than separate components.
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 system effectively detects and differentiates EMI types, providing timely alerts and reducing false alarms, enabling users to take evasive actions and minimizing equipment disruption, while being cost-effective and adaptable to various environments.
Implementation Method 1
an antenna (or antenna(s)), a receiver with receiver protection and associated control electronics
Implementation Method 2
LED and buzzer as indicating means for generating a warning
Data Source
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AI summary
An electromagnetic interference (EMI) indicator comprising an ultra-wideband detector preferably having a bandwidth of at least 30 MHz to 6 GHz comprising at least one antenna for receiving EMI, each antenna having receiver protection, a logarithmic receiver to convert the EMI signal into a direct voltage proportional to the magnitude of the EMI signal, a peak/average detector and controller connected to the output of the receiver for generating a signal when the direct voltage developed in the detector exceeds a pre-set threshold voltage using, for example, a carefully defined algorithm wherein the peak/average detector and controller is connectable to indicating means which is activateable by the controller which stores EMI event data in a non-volatile memory store. Also provided are systems and methods for detecting and protecting electrical / electronic equipment from electromagnetic interference.