Dual-Threshold EMI Pulse Detection for Real-Time Measurement
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Solution Overview
Problem
Current electromagnetic disturbance detection systems are complex, require large storage capacity, and often result in false positives or missed detections due to their reliance on single threshold comparisons, making real-time analysis unreliable and inefficient.
Innovation Solution
A detection and measurement unit using a programmable logic circuit with dual thresholds for pulse detection, along with subunits for pulse duration, amplitude, and repetition frequency measurement, allowing for reliable and efficient real-time detection without significant storage needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital acquisition with high sampling frequency is used, then measurement precision is improved, but storage capacity requirements increase
Solution Approach 1:
The invention extracts only the essential detection function from the complex digital acquisition system. By using a dedicated detection circuit with threshold comparison instead of full digital acquisition and storage, the system obtains pulse detection capability while eliminating the need for large storage memory, thus resolving the contradiction between measurement precision and storage capacity requirements
Solution Approach 2:
The invention replaces expensive, high-capacity storage memory with a simple, low-cost detection circuit that processes signals in real-time. The detection circuit uses basic electronic components (comparators, logic gates) to achieve pulse detection without requiring costly large-capacity memory systems, thereby resolving the contradiction between detection precision and storage cost/capacity
2Device complexity
If single threshold comparison is used, then device complexity is reduced, but detection reliability deteriorates
Solution Approach 1:
The invention segments the detection process into two distinct threshold comparisons: a first threshold for initial pulse detection and a second threshold for confirmation. This segmentation allows the system to maintain low complexity while improving reliability by requiring two-stage verification, thereby reducing false positives without significantly increasing device complexity
Solution Approach 2:
The invention implements feedback through the dual-threshold mechanism where the second threshold comparison provides confirmation feedback for pulses detected by the first threshold. This feedback loop enhances detection reliability by verifying initial detections, while the feedback is achieved through simple logical operations rather than complex control mechanisms, thus resolving the contradiction between complexity and reliability
Data Source
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AI summary
The invention relates to a detection and measurement unit (30) for detecting electromagnetic disturbances, the analysis unit (30) being configured to receive a representative digital signal (501) in which an electromagnetic disturbance may appear. The detection and measurement unit (30) comprises a detection subunit (310) configured to compare the amplitude of the representative digital signal (501) with a first trigger threshold (S1) and a second stop threshold (S2). The second stop threshold (S2) corresponds to an amplitude lower than that of the first trigger threshold (S1). The detection subunit (310) is further configured to detect an electromagnetic pulse each time the amplitude of the representative digital signal crosses the second stop threshold (S2) on the falling edge after the amplitude of the representative digital signal